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https://github.com/sheumann/hush.git
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3944 lines
111 KiB
C
3944 lines
111 KiB
C
/* vi: set sw=8 ts=8: */
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/*
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* tiny vi.c: A small 'vi' clone
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* Copyright (C) 2000, 2001 Sterling Huxley <sterling@europa.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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char *vi_Version =
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"$Id: vi.c,v 1.11 2001/07/02 18:06:14 andersen Exp $";
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/*
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* To compile for standalone use:
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* gcc -Wall -Os -s -DSTANDALONE -o vi vi.c
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* or
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* gcc -Wall -Os -s -DSTANDALONE -DBB_FEATURE_VI_CRASHME -o vi vi.c # include testing features
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* strip vi
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*/
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/*
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* Things To Do:
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* EXINIT
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* $HOME/.exrc and ./.exrc
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* add magic to search /foo.*bar
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* add :help command
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* :map macros
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* how about mode lines: vi: set sw=8 ts=8:
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* if mark[] values were line numbers rather than pointers
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* it would be easier to change the mark when add/delete lines
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* More intelligence in refresh()
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* ":r !cmd" and "!cmd" to filter text through an external command
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* A true "undo" facility
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* An "ex" line oriented mode- maybe using "cmdedit"
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*/
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//---- Feature -------------- Bytes to immplement
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#ifdef STANDALONE
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#define vi_main main
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#define BB_FEATURE_VI_COLON // 4288
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#define BB_FEATURE_VI_YANKMARK // 1408
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#define BB_FEATURE_VI_SEARCH // 1088
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#define BB_FEATURE_VI_USE_SIGNALS // 1056
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#define BB_FEATURE_VI_DOT_CMD // 576
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#define BB_FEATURE_VI_READONLY // 128
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#define BB_FEATURE_VI_SETOPTS // 576
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#define BB_FEATURE_VI_SET // 224
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#define BB_FEATURE_VI_WIN_RESIZE // 256 WIN_RESIZE
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// To test editor using CRASHME:
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// vi -C filename
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// To stop testing, wait until all to text[] is deleted, or
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// Ctrl-Z and kill -9 %1
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// while in the editor Ctrl-T will toggle the crashme function on and off.
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//#define BB_FEATURE_VI_CRASHME // randomly pick commands to execute
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#endif /* STANDALONE */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <time.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <setjmp.h>
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#include <regex.h>
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#include <ctype.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdarg.h>
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#ifndef STANDALONE
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#include "busybox.h"
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#endif /* STANDALONE */
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#ifndef TRUE
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#define TRUE ((int)1)
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#define FALSE ((int)0)
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#endif /* TRUE */
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#define MAX_SCR_COLS BUFSIZ
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// Misc. non-Ascii keys that report an escape sequence
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#define VI_K_UP 128 // cursor key Up
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#define VI_K_DOWN 129 // cursor key Down
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#define VI_K_RIGHT 130 // Cursor Key Right
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#define VI_K_LEFT 131 // cursor key Left
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#define VI_K_HOME 132 // Cursor Key Home
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#define VI_K_END 133 // Cursor Key End
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#define VI_K_INSERT 134 // Cursor Key Insert
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#define VI_K_PAGEUP 135 // Cursor Key Page Up
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#define VI_K_PAGEDOWN 136 // Cursor Key Page Down
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#define VI_K_FUN1 137 // Function Key F1
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#define VI_K_FUN2 138 // Function Key F2
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#define VI_K_FUN3 139 // Function Key F3
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#define VI_K_FUN4 140 // Function Key F4
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#define VI_K_FUN5 141 // Function Key F5
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#define VI_K_FUN6 142 // Function Key F6
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#define VI_K_FUN7 143 // Function Key F7
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#define VI_K_FUN8 144 // Function Key F8
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#define VI_K_FUN9 145 // Function Key F9
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#define VI_K_FUN10 146 // Function Key F10
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#define VI_K_FUN11 147 // Function Key F11
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#define VI_K_FUN12 148 // Function Key F12
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static const int YANKONLY = FALSE;
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static const int YANKDEL = TRUE;
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static const int FORWARD = 1; // code depends on "1" for array index
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static const int BACK = -1; // code depends on "-1" for array index
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static const int LIMITED = 0; // how much of text[] in char_search
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static const int FULL = 1; // how much of text[] in char_search
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static const int S_BEFORE_WS = 1; // used in skip_thing() for moving "dot"
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static const int S_TO_WS = 2; // used in skip_thing() for moving "dot"
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static const int S_OVER_WS = 3; // used in skip_thing() for moving "dot"
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static const int S_END_PUNCT = 4; // used in skip_thing() for moving "dot"
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static const int S_END_ALNUM = 5; // used in skip_thing() for moving "dot"
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typedef unsigned char Byte;
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static int editing; // >0 while we are editing a file
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static int cmd_mode; // 0=command 1=insert
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static int file_modified; // buffer contents changed
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static int err_method; // indicate error with beep or flash
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static int fn_start; // index of first cmd line file name
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static int save_argc; // how many file names on cmd line
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static int cmdcnt; // repetition count
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static fd_set rfds; // use select() for small sleeps
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static struct timeval tv; // use select() for small sleeps
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static char erase_char; // the users erase character
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static int rows, columns; // the terminal screen is this size
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static int crow, ccol, offset; // cursor is on Crow x Ccol with Horz Ofset
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static char *SOs, *SOn; // terminal standout start/normal ESC sequence
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static char *bell; // terminal bell sequence
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static char *Ceol, *Ceos; // Clear-end-of-line and Clear-end-of-screen ESC sequence
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static char *CMrc; // Cursor motion arbitrary destination ESC sequence
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static char *CMup, *CMdown; // Cursor motion up and down ESC sequence
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static Byte *status_buffer; // mesages to the user
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static Byte last_input_char; // last char read from user
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static Byte last_forward_char; // last char searched for with 'f'
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static Byte *cfn; // previous, current, and next file name
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static Byte *text, *end, *textend; // pointers to the user data in memory
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static Byte *screen; // pointer to the virtual screen buffer
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static int screensize; // and its size
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static Byte *screenbegin; // index into text[], of top line on the screen
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static Byte *dot; // where all the action takes place
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static int tabstop;
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static struct termios term_orig, term_vi; // remember what the cooked mode was
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#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
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static int last_row; // where the cursor was last moved to
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#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
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#ifdef BB_FEATURE_VI_USE_SIGNALS
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static jmp_buf restart; // catch_sig()
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#endif /* BB_FEATURE_VI_USE_SIGNALS */
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#ifdef BB_FEATURE_VI_WIN_RESIZE
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static struct winsize winsize; // remember the window size
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#endif /* BB_FEATURE_VI_WIN_RESIZE */
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#ifdef BB_FEATURE_VI_DOT_CMD
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static int adding2q; // are we currently adding user input to q
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static Byte *last_modifying_cmd; // last modifying cmd for "."
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static Byte *ioq, *ioq_start; // pointer to string for get_one_char to "read"
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#endif /* BB_FEATURE_VI_DOT_CMD */
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#if defined(BB_FEATURE_VI_DOT_CMD) || defined(BB_FEATURE_VI_YANKMARK)
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static Byte *modifying_cmds; // cmds that modify text[]
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#endif /* BB_FEATURE_VI_DOT_CMD || BB_FEATURE_VI_YANKMARK */
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#ifdef BB_FEATURE_VI_READONLY
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static int vi_readonly, readonly;
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#endif /* BB_FEATURE_VI_READONLY */
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#ifdef BB_FEATURE_VI_SETOPTS
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static int autoindent;
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static int showmatch;
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static int ignorecase;
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#endif /* BB_FEATURE_VI_SETOPTS */
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#ifdef BB_FEATURE_VI_YANKMARK
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static Byte *reg[28]; // named register a-z, "D", and "U" 0-25,26,27
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static int YDreg, Ureg; // default delete register and orig line for "U"
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static Byte *mark[28]; // user marks points somewhere in text[]- a-z and previous context ''
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static Byte *context_start, *context_end;
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#endif /* BB_FEATURE_VI_YANKMARK */
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#ifdef BB_FEATURE_VI_SEARCH
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static Byte *last_search_pattern; // last pattern from a '/' or '?' search
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#endif /* BB_FEATURE_VI_SEARCH */
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static void edit_file(Byte *); // edit one file
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static void do_cmd(Byte); // execute a command
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static void sync_cursor(Byte *, int *, int *); // synchronize the screen cursor to dot
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static Byte *begin_line(Byte *); // return pointer to cur line B-o-l
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static Byte *end_line(Byte *); // return pointer to cur line E-o-l
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static Byte *dollar_line(Byte *); // return pointer to just before NL
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static Byte *prev_line(Byte *); // return pointer to prev line B-o-l
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static Byte *next_line(Byte *); // return pointer to next line B-o-l
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static Byte *end_screen(void); // get pointer to last char on screen
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static int count_lines(Byte *, Byte *); // count line from start to stop
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static Byte *find_line(int); // find begining of line #li
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static Byte *move_to_col(Byte *, int); // move "p" to column l
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static int isblnk(Byte); // is the char a blank or tab
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static void dot_left(void); // move dot left- dont leave line
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static void dot_right(void); // move dot right- dont leave line
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static void dot_begin(void); // move dot to B-o-l
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static void dot_end(void); // move dot to E-o-l
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static void dot_next(void); // move dot to next line B-o-l
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static void dot_prev(void); // move dot to prev line B-o-l
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static void dot_scroll(int, int); // move the screen up or down
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static void dot_skip_over_ws(void); // move dot pat WS
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static void dot_delete(void); // delete the char at 'dot'
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static Byte *bound_dot(Byte *); // make sure text[0] <= P < "end"
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static Byte *new_screen(int, int); // malloc virtual screen memory
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static Byte *new_text(int); // malloc memory for text[] buffer
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static Byte *char_insert(Byte *, Byte); // insert the char c at 'p'
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static Byte *stupid_insert(Byte *, Byte); // stupidly insert the char c at 'p'
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static Byte find_range(Byte **, Byte **, Byte); // return pointers for an object
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static int st_test(Byte *, int, int, Byte *); // helper for skip_thing()
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static Byte *skip_thing(Byte *, int, int, int); // skip some object
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static Byte *find_pair(Byte *, Byte); // find matching pair () [] {}
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static Byte *text_hole_delete(Byte *, Byte *); // at "p", delete a 'size' byte hole
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static Byte *text_hole_make(Byte *, int); // at "p", make a 'size' byte hole
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static Byte *yank_delete(Byte *, Byte *, int, int); // yank text[] into register then delete
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static void show_help(void); // display some help info
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static void print_literal(Byte *, Byte *); // copy s to buf, convert unprintable
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static void rawmode(void); // set "raw" mode on tty
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static void cookmode(void); // return to "cooked" mode on tty
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static int mysleep(int); // sleep for 'h' 1/100 seconds
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static Byte readit(void); // read (maybe cursor) key from stdin
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static Byte get_one_char(void); // read 1 char from stdin
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static int file_size(Byte *); // what is the byte size of "fn"
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static int file_insert(Byte *, Byte *, int);
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static int file_write(Byte *, Byte *, Byte *);
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static void place_cursor(int, int, int);
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static void screen_erase();
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static void clear_to_eol(void);
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static void clear_to_eos(void);
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static void standout_start(void); // send "start reverse video" sequence
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static void standout_end(void); // send "end reverse video" sequence
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static void flash(int); // flash the terminal screen
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static void beep(void); // beep the terminal
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static void indicate_error(char); // use flash or beep to indicate error
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static void show_status_line(void); // put a message on the bottom line
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static void psb(char *, ...); // Print Status Buf
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static void psbs(char *, ...); // Print Status Buf in standout mode
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static void ni(Byte *); // display messages
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static void edit_status(void); // show file status on status line
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static void redraw(int); // force a full screen refresh
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static void format_line(Byte*, Byte*, int);
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static void refresh(int); // update the terminal from screen[]
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#ifdef BB_FEATURE_VI_SEARCH
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static Byte *char_search(Byte *, Byte *, int, int); // search for pattern starting at p
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static int mycmp(Byte *, Byte *, int); // string cmp based in "ignorecase"
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#endif /* BB_FEATURE_VI_SEARCH */
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#ifdef BB_FEATURE_VI_COLON
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static void Hit_Return(void);
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static Byte *get_one_address(Byte *, int *); // get colon addr, if present
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static Byte *get_address(Byte *, int *, int *); // get two colon addrs, if present
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static void colon(Byte *); // execute the "colon" mode cmds
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#endif /* BB_FEATURE_VI_COLON */
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static Byte *get_input_line(Byte *); // get input line- use "status line"
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#ifdef BB_FEATURE_VI_USE_SIGNALS
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static void winch_sig(int); // catch window size changes
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static void suspend_sig(int); // catch ctrl-Z
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static void alarm_sig(int); // catch alarm time-outs
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static void catch_sig(int); // catch ctrl-C
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static void core_sig(int); // catch a core dump signal
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#endif /* BB_FEATURE_VI_USE_SIGNALS */
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#ifdef BB_FEATURE_VI_DOT_CMD
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static void start_new_cmd_q(Byte); // new queue for command
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static void end_cmd_q(); // stop saving input chars
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#else /* BB_FEATURE_VI_DOT_CMD */
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#define end_cmd_q()
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#endif /* BB_FEATURE_VI_DOT_CMD */
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#ifdef BB_FEATURE_VI_WIN_RESIZE
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static void window_size_get(int); // find out what size the window is
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#endif /* BB_FEATURE_VI_WIN_RESIZE */
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#ifdef BB_FEATURE_VI_SETOPTS
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static void showmatching(Byte *); // show the matching pair () [] {}
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#endif /* BB_FEATURE_VI_SETOPTS */
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#if defined(BB_FEATURE_VI_YANKMARK) || defined(BB_FEATURE_VI_COLON) || defined(BB_FEATURE_VI_CRASHME)
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static Byte *string_insert(Byte *, Byte *); // insert the string at 'p'
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#endif /* BB_FEATURE_VI_YANKMARK || BB_FEATURE_VI_COLON || BB_FEATURE_VI_CRASHME */
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#ifdef BB_FEATURE_VI_YANKMARK
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static Byte *text_yank(Byte *, Byte *, int); // save copy of "p" into a register
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static Byte what_reg(void); // what is letter of current YDreg
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static void check_context(Byte); // remember context for '' command
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static Byte *swap_context(Byte *); // goto new context for '' command
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#endif /* BB_FEATURE_VI_YANKMARK */
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#ifdef BB_FEATURE_VI_CRASHME
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static void crash_dummy();
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static void crash_test();
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static int crashme = 0;
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#endif /* BB_FEATURE_VI_CRASHME */
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extern int vi_main(int argc, char **argv)
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{
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int c;
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#ifdef BB_FEATURE_VI_YANKMARK
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int i;
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#endif /* BB_FEATURE_VI_YANKMARK */
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CMrc= "\033[%d;%dH"; // Terminal Crusor motion ESC sequence
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CMup= "\033[A"; // move cursor up one line, same col
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CMdown="\n"; // move cursor down one line, same col
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Ceol= "\033[0K"; // Clear from cursor to end of line
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Ceos= "\033[0J"; // Clear from cursor to end of screen
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SOs = "\033[7m"; // Terminal standout mode on
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SOn = "\033[0m"; // Terminal standout mode off
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||
bell= "\007"; // Terminal bell sequence
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||
#ifdef BB_FEATURE_VI_CRASHME
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(void) srand((long) getpid());
|
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#endif /* BB_FEATURE_VI_CRASHME */
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status_buffer = (Byte *) malloc(200); // hold messages to user
|
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#ifdef BB_FEATURE_VI_READONLY
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vi_readonly = readonly = FALSE;
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if (strncmp(argv[0], "view", 4) == 0) {
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readonly = TRUE;
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vi_readonly = TRUE;
|
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}
|
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#endif /* BB_FEATURE_VI_READONLY */
|
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#ifdef BB_FEATURE_VI_SETOPTS
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autoindent = 1;
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ignorecase = 1;
|
||
showmatch = 1;
|
||
#endif /* BB_FEATURE_VI_SETOPTS */
|
||
#ifdef BB_FEATURE_VI_YANKMARK
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for (i = 0; i < 28; i++) {
|
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reg[i] = 0;
|
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} // init the yank regs
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
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modifying_cmds = (Byte *) "aAcCdDiIJoOpPrRsxX<>~"; // cmds modifying text[]
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
|
||
// 1- process $HOME/.exrc file
|
||
// 2- process EXINIT variable from environment
|
||
// 3- process command line args
|
||
while ((c = getopt(argc, argv, "hCR")) != -1) {
|
||
switch (c) {
|
||
#ifdef BB_FEATURE_VI_CRASHME
|
||
case 'C':
|
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crashme = 1;
|
||
break;
|
||
#endif /* BB_FEATURE_VI_CRASHME */
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
case 'R': // Read-only flag
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readonly = TRUE;
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||
break;
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
//case 'r': // recover flag- ignore- we don't use tmp file
|
||
//case 'x': // encryption flag- ignore
|
||
//case 'c': // execute command first
|
||
//case 'h': // help -- just use default
|
||
default:
|
||
show_help();
|
||
return 1;
|
||
}
|
||
}
|
||
|
||
// The argv array can be used by the ":next" and ":rewind" commands
|
||
// save optind.
|
||
fn_start = optind; // remember first file name for :next and :rew
|
||
save_argc = argc;
|
||
|
||
//----- This is the main file handling loop --------------
|
||
if (optind >= argc) {
|
||
editing = 1; // 0= exit, 1= one file, 2= multiple files
|
||
edit_file(0);
|
||
} else {
|
||
for (; optind < argc; optind++) {
|
||
editing = 1; // 0=exit, 1=one file, 2+ =many files
|
||
if (cfn != 0)
|
||
free(cfn);
|
||
cfn = (Byte *) strdup(argv[optind]);
|
||
edit_file(cfn);
|
||
}
|
||
}
|
||
//-----------------------------------------------------------
|
||
|
||
return (0);
|
||
}
|
||
|
||
static void edit_file(Byte * fn)
|
||
{
|
||
char c;
|
||
int cnt, size, ch;
|
||
|
||
#ifdef BB_FEATURE_VI_USE_SIGNALS
|
||
char *msg;
|
||
int sig;
|
||
#endif /* BB_FEATURE_VI_USE_SIGNALS */
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
static Byte *cur_line;
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
|
||
rawmode();
|
||
rows = 24;
|
||
columns = 80;
|
||
ch= -1;
|
||
#ifdef BB_FEATURE_VI_WIN_RESIZE
|
||
window_size_get(0);
|
||
#endif /* BB_FEATURE_VI_WIN_RESIZE */
|
||
new_screen(rows, columns); // get memory for virtual screen
|
||
|
||
cnt = file_size(fn); // file size
|
||
size = 2 * cnt; // 200% of file size
|
||
new_text(size); // get a text[] buffer
|
||
screenbegin = dot = end = text;
|
||
if (fn != 0) {
|
||
ch= file_insert(fn, text, cnt);
|
||
}
|
||
if (ch < 1) {
|
||
(void) char_insert(text, '\n'); // start empty buf with dummy line
|
||
}
|
||
file_modified = FALSE;
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
YDreg = 26; // default Yank/Delete reg
|
||
Ureg = 27; // hold orig line for "U" cmd
|
||
for (cnt = 0; cnt < 28; cnt++) {
|
||
mark[cnt] = 0;
|
||
} // init the marks
|
||
mark[26] = mark[27] = text; // init "previous context"
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
|
||
err_method = 1; // flash
|
||
last_forward_char = last_input_char = '\0';
|
||
crow = 0;
|
||
ccol = 0;
|
||
edit_status();
|
||
|
||
#ifdef BB_FEATURE_VI_USE_SIGNALS
|
||
signal(SIGHUP, catch_sig);
|
||
signal(SIGINT, catch_sig);
|
||
signal(SIGALRM, alarm_sig);
|
||
signal(SIGTERM, catch_sig);
|
||
signal(SIGQUIT, core_sig);
|
||
signal(SIGILL, core_sig);
|
||
signal(SIGTRAP, core_sig);
|
||
signal(SIGIOT, core_sig);
|
||
signal(SIGABRT, core_sig);
|
||
signal(SIGFPE, core_sig);
|
||
signal(SIGBUS, core_sig);
|
||
signal(SIGSEGV, core_sig);
|
||
#ifdef SIGSYS
|
||
signal(SIGSYS, core_sig);
|
||
#endif
|
||
signal(SIGWINCH, winch_sig);
|
||
signal(SIGTSTP, suspend_sig);
|
||
sig = setjmp(restart);
|
||
if (sig != 0) {
|
||
msg = "";
|
||
if (sig == SIGWINCH)
|
||
msg = "(window resize)";
|
||
if (sig == SIGHUP)
|
||
msg = "(hangup)";
|
||
if (sig == SIGINT)
|
||
msg = "(interrupt)";
|
||
if (sig == SIGTERM)
|
||
msg = "(terminate)";
|
||
if (sig == SIGBUS)
|
||
msg = "(bus error)";
|
||
if (sig == SIGSEGV)
|
||
msg = "(I tried to touch invalid memory)";
|
||
if (sig == SIGALRM)
|
||
msg = "(alarm)";
|
||
|
||
psbs("-- caught signal %d %s--", sig, msg);
|
||
screenbegin = dot = text;
|
||
}
|
||
#endif /* BB_FEATURE_VI_USE_SIGNALS */
|
||
|
||
editing = 1;
|
||
cmd_mode = 0; // 0=command 1=insert 2='R'eplace
|
||
cmdcnt = 0;
|
||
tabstop = 8;
|
||
offset = 0; // no horizontal offset
|
||
c = '\0';
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
||
if (last_modifying_cmd != 0)
|
||
free(last_modifying_cmd);
|
||
if (ioq_start != NULL)
|
||
free(ioq_start);
|
||
ioq = ioq_start = last_modifying_cmd = 0;
|
||
adding2q = 0;
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
redraw(FALSE); // dont force every col re-draw
|
||
show_status_line();
|
||
|
||
//------This is the main Vi cmd handling loop -----------------------
|
||
while (editing > 0) {
|
||
#ifdef BB_FEATURE_VI_CRASHME
|
||
if (crashme > 0) {
|
||
if ((end - text) > 1) {
|
||
crash_dummy(); // generate a random command
|
||
} else {
|
||
crashme = 0;
|
||
dot =
|
||
string_insert(text, (Byte *) "\n\n##### Ran out of text to work on. #####\n\n"); // insert the string
|
||
refresh(FALSE);
|
||
}
|
||
}
|
||
#endif /* BB_FEATURE_VI_CRASHME */
|
||
last_input_char = c = get_one_char(); // get a cmd from user
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
// save a copy of the current line- for the 'U" command
|
||
if (begin_line(dot) != cur_line) {
|
||
cur_line = begin_line(dot);
|
||
text_yank(begin_line(dot), end_line(dot), Ureg);
|
||
}
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
||
// These are commands that change text[].
|
||
// Remember the input for the "." command
|
||
if (!adding2q && ioq_start == 0
|
||
&& strchr((char *) modifying_cmds, c) != NULL) {
|
||
start_new_cmd_q(c);
|
||
}
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
do_cmd(c); // execute the user command
|
||
//
|
||
// poll to see if there is input already waiting. if we are
|
||
// not able to display output fast enough to keep up, skip
|
||
// the display update until we catch up with input.
|
||
if (mysleep(0) == 0) {
|
||
// no input pending- so update output
|
||
refresh(FALSE);
|
||
show_status_line();
|
||
}
|
||
#ifdef BB_FEATURE_VI_CRASHME
|
||
if (crashme > 0)
|
||
crash_test(); // test editor variables
|
||
#endif /* BB_FEATURE_VI_CRASHME */
|
||
}
|
||
//-------------------------------------------------------------------
|
||
|
||
place_cursor(rows, 0, FALSE); // go to bottom of screen
|
||
clear_to_eol(); // Erase to end of line
|
||
cookmode();
|
||
}
|
||
|
||
static Byte readbuffer[BUFSIZ];
|
||
|
||
#ifdef BB_FEATURE_VI_CRASHME
|
||
static int totalcmds = 0;
|
||
static int Mp = 85; // Movement command Probability
|
||
static int Np = 90; // Non-movement command Probability
|
||
static int Dp = 96; // Delete command Probability
|
||
static int Ip = 97; // Insert command Probability
|
||
static int Yp = 98; // Yank command Probability
|
||
static int Pp = 99; // Put command Probability
|
||
static int M = 0, N = 0, I = 0, D = 0, Y = 0, P = 0, U = 0;
|
||
char chars[20] = "\t012345 abcdABCD-=.$";
|
||
char *words[20] = { "this", "is", "a", "test",
|
||
"broadcast", "the", "emergency", "of",
|
||
"system", "quick", "brown", "fox",
|
||
"jumped", "over", "lazy", "dogs",
|
||
"back", "January", "Febuary", "March"
|
||
};
|
||
char *lines[20] = {
|
||
"You should have received a copy of the GNU General Public License\n",
|
||
"char c, cm, *cmd, *cmd1;\n",
|
||
"generate a command by percentages\n",
|
||
"Numbers may be typed as a prefix to some commands.\n",
|
||
"Quit, discarding changes!\n",
|
||
"Forced write, if permission originally not valid.\n",
|
||
"In general, any ex or ed command (such as substitute or delete).\n",
|
||
"I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
|
||
"Please get w/ me and I will go over it with you.\n",
|
||
"The following is a list of scheduled, committed changes.\n",
|
||
"1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
|
||
"Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
|
||
"Any question about transactions please contact Sterling Huxley.\n",
|
||
"I will try to get back to you by Friday, December 31.\n",
|
||
"This Change will be implemented on Friday.\n",
|
||
"Let me know if you have problems accessing this;\n",
|
||
"Sterling Huxley recently added you to the access list.\n",
|
||
"Would you like to go to lunch?\n",
|
||
"The last command will be automatically run.\n",
|
||
"This is too much english for a computer geek.\n",
|
||
};
|
||
char *multilines[20] = {
|
||
"You should have received a copy of the GNU General Public License\n",
|
||
"char c, cm, *cmd, *cmd1;\n",
|
||
"generate a command by percentages\n",
|
||
"Numbers may be typed as a prefix to some commands.\n",
|
||
"Quit, discarding changes!\n",
|
||
"Forced write, if permission originally not valid.\n",
|
||
"In general, any ex or ed command (such as substitute or delete).\n",
|
||
"I have tickets available for the Blazers vs LA Clippers for Monday, Janurary 1 at 1:00pm.\n",
|
||
"Please get w/ me and I will go over it with you.\n",
|
||
"The following is a list of scheduled, committed changes.\n",
|
||
"1. Launch Norton Antivirus (Start, Programs, Norton Antivirus)\n",
|
||
"Reminder....Town Meeting in Central Perk cafe today at 3:00pm.\n",
|
||
"Any question about transactions please contact Sterling Huxley.\n",
|
||
"I will try to get back to you by Friday, December 31.\n",
|
||
"This Change will be implemented on Friday.\n",
|
||
"Let me know if you have problems accessing this;\n",
|
||
"Sterling Huxley recently added you to the access list.\n",
|
||
"Would you like to go to lunch?\n",
|
||
"The last command will be automatically run.\n",
|
||
"This is too much english for a computer geek.\n",
|
||
};
|
||
|
||
// create a random command to execute
|
||
static void crash_dummy()
|
||
{
|
||
static int sleeptime; // how long to pause between commands
|
||
char c, cm, *cmd, *cmd1;
|
||
int i, cnt, thing, rbi, startrbi, percent;
|
||
|
||
// "dot" movement commands
|
||
cmd1 = " \n\r\002\004\005\006\025\0310^$-+wWeEbBhjklHL";
|
||
|
||
// is there already a command running?
|
||
if (strlen((char *) readbuffer) > 0)
|
||
goto cd1;
|
||
cd0:
|
||
startrbi = rbi = 0;
|
||
sleeptime = 0; // how long to pause between commands
|
||
memset(readbuffer, '\0', BUFSIZ - 1); // clear the read buffer
|
||
// generate a command by percentages
|
||
percent = (int) lrand48() % 100; // get a number from 0-99
|
||
if (percent < Mp) { // Movement commands
|
||
// available commands
|
||
cmd = cmd1;
|
||
M++;
|
||
} else if (percent < Np) { // non-movement commands
|
||
cmd = "mz<>\'\""; // available commands
|
||
N++;
|
||
} else if (percent < Dp) { // Delete commands
|
||
cmd = "dx"; // available commands
|
||
D++;
|
||
} else if (percent < Ip) { // Inset commands
|
||
cmd = "iIaAsrJ"; // available commands
|
||
I++;
|
||
} else if (percent < Yp) { // Yank commands
|
||
cmd = "yY"; // available commands
|
||
Y++;
|
||
} else if (percent < Pp) { // Put commands
|
||
cmd = "pP"; // available commands
|
||
P++;
|
||
} else {
|
||
// We do not know how to handle this command, try again
|
||
U++;
|
||
goto cd0;
|
||
}
|
||
// randomly pick one of the available cmds from "cmd[]"
|
||
i = (int) lrand48() % strlen(cmd);
|
||
cm = cmd[i];
|
||
if (strchr(":\024", cm))
|
||
goto cd0; // dont allow colon or ctrl-T commands
|
||
readbuffer[rbi++] = cm; // put cmd into input buffer
|
||
|
||
// now we have the command-
|
||
// there are 1, 2, and multi char commands
|
||
// find out which and generate the rest of command as necessary
|
||
if (strchr("dmryz<>\'\"", cm)) { // 2-char commands
|
||
cmd1 = " \n\r0$^-+wWeEbBhjklHL";
|
||
if (cm == 'm' || cm == '\'' || cm == '\"') { // pick a reg[]
|
||
cmd1 = "abcdefghijklmnopqrstuvwxyz";
|
||
}
|
||
thing = (int) lrand48() % strlen(cmd1); // pick a movement command
|
||
c = cmd1[thing];
|
||
readbuffer[rbi++] = c; // add movement to input buffer
|
||
}
|
||
if (strchr("iIaAsc", cm)) { // multi-char commands
|
||
if (cm == 'c') {
|
||
// change some thing
|
||
thing = (int) lrand48() % strlen(cmd1); // pick a movement command
|
||
c = cmd1[thing];
|
||
readbuffer[rbi++] = c; // add movement to input buffer
|
||
}
|
||
thing = (int) lrand48() % 4; // what thing to insert
|
||
cnt = (int) lrand48() % 10; // how many to insert
|
||
for (i = 0; i < cnt; i++) {
|
||
if (thing == 0) { // insert chars
|
||
readbuffer[rbi++] = chars[((int) lrand48() % strlen(chars))];
|
||
} else if (thing == 1) { // insert words
|
||
strcat((char *) readbuffer, words[(int) lrand48() % 20]);
|
||
strcat((char *) readbuffer, " ");
|
||
sleeptime = 0; // how fast to type
|
||
} else if (thing == 2) { // insert lines
|
||
strcat((char *) readbuffer, lines[(int) lrand48() % 20]);
|
||
sleeptime = 0; // how fast to type
|
||
} else { // insert multi-lines
|
||
strcat((char *) readbuffer, multilines[(int) lrand48() % 20]);
|
||
sleeptime = 0; // how fast to type
|
||
}
|
||
}
|
||
strcat((char *) readbuffer, "\033");
|
||
}
|
||
cd1:
|
||
totalcmds++;
|
||
if (sleeptime > 0)
|
||
(void) mysleep(sleeptime); // sleep 1/100 sec
|
||
}
|
||
|
||
// test to see if there are any errors
|
||
static void crash_test()
|
||
{
|
||
static time_t oldtim;
|
||
time_t tim;
|
||
char d[2], buf[BUFSIZ], msg[BUFSIZ];
|
||
|
||
msg[0] = '\0';
|
||
if (end < text) {
|
||
strcat((char *) msg, "end<text ");
|
||
}
|
||
if (end > textend) {
|
||
strcat((char *) msg, "end>textend ");
|
||
}
|
||
if (dot < text) {
|
||
strcat((char *) msg, "dot<text ");
|
||
}
|
||
if (dot > end) {
|
||
strcat((char *) msg, "dot>end ");
|
||
}
|
||
if (screenbegin < text) {
|
||
strcat((char *) msg, "screenbegin<text ");
|
||
}
|
||
if (screenbegin > end - 1) {
|
||
strcat((char *) msg, "screenbegin>end-1 ");
|
||
}
|
||
|
||
if (strlen(msg) > 0) {
|
||
alarm(0);
|
||
sprintf(buf, "\n\n%d: \'%c\' %s\n\n\n%s[Hit return to continue]%s",
|
||
totalcmds, last_input_char, msg, SOs, SOn);
|
||
write(1, buf, strlen(buf));
|
||
while (read(0, d, 1) > 0) {
|
||
if (d[0] == '\n' || d[0] == '\r')
|
||
break;
|
||
}
|
||
alarm(3);
|
||
}
|
||
tim = (time_t) time((time_t *) 0);
|
||
if (tim >= (oldtim + 3)) {
|
||
sprintf((char *) status_buffer,
|
||
"Tot=%d: M=%d N=%d I=%d D=%d Y=%d P=%d U=%d size=%d",
|
||
totalcmds, M, N, I, D, Y, P, U, end - text + 1);
|
||
oldtim = tim;
|
||
}
|
||
return;
|
||
}
|
||
#endif /* BB_FEATURE_VI_CRASHME */
|
||
|
||
//---------------------------------------------------------------------
|
||
//----- the Ascii Chart -----------------------------------------------
|
||
//
|
||
// 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
|
||
// 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
|
||
// 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
|
||
// 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
|
||
// 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
|
||
// 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
|
||
// 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
|
||
// 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
|
||
// 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
|
||
// 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
|
||
// 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
|
||
// 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
|
||
// 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
|
||
// 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
|
||
// 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
|
||
// 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
|
||
//---------------------------------------------------------------------
|
||
|
||
//----- Execute a Vi Command -----------------------------------
|
||
static void do_cmd(Byte c)
|
||
{
|
||
Byte c1, *p, *q, *msg, buf[9], *save_dot;
|
||
int cnt, i, j, dir, yf;
|
||
|
||
c1 = c; // quiet the compiler
|
||
cnt = yf = dir = 0; // quiet the compiler
|
||
p = q = save_dot = msg = buf; // quiet the compiler
|
||
memset(buf, '\0', 9); // clear buf
|
||
if (cmd_mode == 2) {
|
||
// we are 'R'eplacing the current *dot with new char
|
||
if (*dot == '\n') {
|
||
// don't Replace past E-o-l
|
||
cmd_mode = 1; // convert to insert
|
||
} else {
|
||
if (1 <= c && c <= 127) { // only ASCII chars
|
||
if (c != 27)
|
||
dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
|
||
dot = char_insert(dot, c); // insert new char
|
||
}
|
||
goto dc1;
|
||
}
|
||
}
|
||
if (cmd_mode == 1) {
|
||
// hitting "Insert" twice means "R" replace mode
|
||
if (c == VI_K_INSERT) goto dc5;
|
||
// insert the char c at "dot"
|
||
if (1 <= c && c <= 127) {
|
||
dot = char_insert(dot, c); // only ASCII chars
|
||
}
|
||
goto dc1;
|
||
}
|
||
|
||
switch (c) {
|
||
//case 0x01: // soh
|
||
//case 0x09: // ht
|
||
//case 0x0b: // vt
|
||
//case 0x0e: // so
|
||
//case 0x0f: // si
|
||
//case 0x10: // dle
|
||
//case 0x11: // dc1
|
||
//case 0x13: // dc3
|
||
#ifdef BB_FEATURE_VI_CRASHME
|
||
case 0x14: // dc4 ctrl-T
|
||
crashme = (crashme == 0) ? 1 : 0;
|
||
break;
|
||
#endif /* BB_FEATURE_VI_CRASHME */
|
||
//case 0x16: // syn
|
||
//case 0x17: // etb
|
||
//case 0x18: // can
|
||
//case 0x1c: // fs
|
||
//case 0x1d: // gs
|
||
//case 0x1e: // rs
|
||
//case 0x1f: // us
|
||
//case '!': // !-
|
||
//case '#': // #-
|
||
//case '&': // &-
|
||
//case '(': // (-
|
||
//case ')': // )-
|
||
//case '*': // *-
|
||
//case ',': // ,-
|
||
//case '=': // =-
|
||
//case '@': // @-
|
||
//case 'F': // F-
|
||
//case 'K': // K-
|
||
//case 'Q': // Q-
|
||
//case 'S': // S-
|
||
//case 'T': // T-
|
||
//case 'V': // V-
|
||
//case '[': // [-
|
||
//case '\\': // \-
|
||
//case ']': // ]-
|
||
//case '_': // _-
|
||
//case '`': // `-
|
||
//case 'g': // g-
|
||
//case 'u': // u- FIXME- there is no undo
|
||
//case 'v': // v-
|
||
default: // unrecognised command
|
||
buf[0] = c;
|
||
buf[1] = '\0';
|
||
if (c <= ' ') {
|
||
buf[0] = '^';
|
||
buf[1] = c + '@';
|
||
buf[2] = '\0';
|
||
}
|
||
ni((Byte *) buf);
|
||
end_cmd_q(); // stop adding to q
|
||
case 0x00: // nul- ignore
|
||
break;
|
||
case 2: // ctrl-B scroll up full screen
|
||
case VI_K_PAGEUP: // Cursor Key Page Up
|
||
dot_scroll(rows - 2, -1);
|
||
break;
|
||
#ifdef BB_FEATURE_VI_USE_SIGNALS
|
||
case 0x03: // ctrl-C interrupt
|
||
longjmp(restart, 1);
|
||
break;
|
||
case 26: // ctrl-Z suspend
|
||
suspend_sig(SIGTSTP);
|
||
break;
|
||
#endif /* BB_FEATURE_VI_USE_SIGNALS */
|
||
case 4: // ctrl-D scroll down half screen
|
||
dot_scroll((rows - 2) / 2, 1);
|
||
break;
|
||
case 5: // ctrl-E scroll down one line
|
||
dot_scroll(1, 1);
|
||
break;
|
||
case 6: // ctrl-F scroll down full screen
|
||
case VI_K_PAGEDOWN: // Cursor Key Page Down
|
||
dot_scroll(rows - 2, 1);
|
||
break;
|
||
case 7: // ctrl-G show current status
|
||
edit_status();
|
||
break;
|
||
case 'h': // h- move left
|
||
case VI_K_LEFT: // cursor key Left
|
||
case 8: // ctrl-H- move left (This may be ERASE char)
|
||
case 127: // DEL- move left (This may be ERASE char)
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dot_left();
|
||
break;
|
||
case 10: // Newline ^J
|
||
case 'j': // j- goto next line, same col
|
||
case VI_K_DOWN: // cursor key Down
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dot_next(); // go to next B-o-l
|
||
dot = move_to_col(dot, ccol + offset); // try stay in same col
|
||
break;
|
||
case 12: // ctrl-L force redraw whole screen
|
||
case 18: // ctrl-R force redraw
|
||
place_cursor(0, 0, FALSE); // put cursor in correct place
|
||
clear_to_eos(); // tel terminal to erase display
|
||
(void) mysleep(10);
|
||
screen_erase(); // erase the internal screen buffer
|
||
refresh(TRUE); // this will redraw the entire display
|
||
break;
|
||
case 13: // Carriage Return ^M
|
||
case '+': // +- goto next line
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dot_next();
|
||
dot_skip_over_ws();
|
||
break;
|
||
case 21: // ctrl-U scroll up half screen
|
||
dot_scroll((rows - 2) / 2, -1);
|
||
break;
|
||
case 25: // ctrl-Y scroll up one line
|
||
dot_scroll(1, -1);
|
||
break;
|
||
case 27: // esc
|
||
if (cmd_mode == 0)
|
||
indicate_error(c);
|
||
cmd_mode = 0; // stop insrting
|
||
end_cmd_q();
|
||
*status_buffer = '\0'; // clear status buffer
|
||
break;
|
||
case ' ': // move right
|
||
case 'l': // move right
|
||
case VI_K_RIGHT: // Cursor Key Right
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dot_right();
|
||
break;
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
case '"': // "- name a register to use for Delete/Yank
|
||
c1 = get_one_char();
|
||
c1 = tolower(c1);
|
||
if (islower(c1)) {
|
||
YDreg = c1 - 'a';
|
||
} else {
|
||
indicate_error(c);
|
||
}
|
||
break;
|
||
case '\'': // '- goto a specific mark
|
||
c1 = get_one_char();
|
||
c1 = tolower(c1);
|
||
if (islower(c1)) {
|
||
c1 = c1 - 'a';
|
||
// get the b-o-l
|
||
q = mark[(int) c1];
|
||
if (text <= q && q < end) {
|
||
dot = q;
|
||
dot_begin(); // go to B-o-l
|
||
dot_skip_over_ws();
|
||
}
|
||
} else if (c1 == '\'') { // goto previous context
|
||
dot = swap_context(dot); // swap current and previous context
|
||
dot_begin(); // go to B-o-l
|
||
dot_skip_over_ws();
|
||
} else {
|
||
indicate_error(c);
|
||
}
|
||
break;
|
||
case 'm': // m- Mark a line
|
||
// this is really stupid. If there are any inserts or deletes
|
||
// between text[0] and dot then this mark will not point to the
|
||
// correct location! It could be off by many lines!
|
||
// Well..., at least its quick and dirty.
|
||
c1 = get_one_char();
|
||
c1 = tolower(c1);
|
||
if (islower(c1)) {
|
||
c1 = c1 - 'a';
|
||
// remember the line
|
||
mark[(int) c1] = dot;
|
||
} else {
|
||
indicate_error(c);
|
||
}
|
||
break;
|
||
case 'P': // P- Put register before
|
||
case 'p': // p- put register after
|
||
p = reg[YDreg];
|
||
if (p == 0) {
|
||
psbs("Nothing in register %c", what_reg());
|
||
break;
|
||
}
|
||
// are we putting whole lines or strings
|
||
if (strchr((char *) p, '\n') != NULL) {
|
||
if (c == 'P') {
|
||
dot_begin(); // putting lines- Put above
|
||
}
|
||
if (c == 'p') {
|
||
// are we putting after very last line?
|
||
if (end_line(dot) == (end - 1)) {
|
||
dot = end; // force dot to end of text[]
|
||
} else {
|
||
dot_next(); // next line, then put before
|
||
}
|
||
}
|
||
} else {
|
||
if (c == 'p')
|
||
dot_right(); // move to right, can move to NL
|
||
}
|
||
dot = string_insert(dot, p); // insert the string
|
||
end_cmd_q(); // stop adding to q
|
||
break;
|
||
case 'U': // U- Undo; replace current line with original version
|
||
if (reg[Ureg] != 0) {
|
||
p = begin_line(dot);
|
||
q = end_line(dot);
|
||
p = text_hole_delete(p, q); // delete cur line
|
||
p = string_insert(p, reg[Ureg]); // insert orig line
|
||
dot = p;
|
||
dot_skip_over_ws();
|
||
}
|
||
break;
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
case '$': // $- goto end of line
|
||
case VI_K_END: // Cursor Key End
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dot = end_line(dot + 1);
|
||
break;
|
||
case '%': // %- find matching char of pair () [] {}
|
||
for (q = dot; q < end && *q != '\n'; q++) {
|
||
if (strchr("()[]{}", *q) != NULL) {
|
||
// we found half of a pair
|
||
p = find_pair(q, *q);
|
||
if (p == NULL) {
|
||
indicate_error(c);
|
||
} else {
|
||
dot = p;
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
if (*q == '\n')
|
||
indicate_error(c);
|
||
break;
|
||
case 'f': // f- forward to a user specified char
|
||
last_forward_char = get_one_char(); // get the search char
|
||
//
|
||
// dont seperate these two commands. 'f' depends on ';'
|
||
//
|
||
//**** fall thru to ... 'i'
|
||
case ';': // ;- look at rest of line for last forward char
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(';');
|
||
} // repeat cnt
|
||
if (last_forward_char == 0) break;
|
||
q = dot + 1;
|
||
while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
|
||
q++;
|
||
}
|
||
if (*q == last_forward_char)
|
||
dot = q;
|
||
break;
|
||
case '-': // -- goto prev line
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dot_prev();
|
||
dot_skip_over_ws();
|
||
break;
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
||
case '.': // .- repeat the last modifying command
|
||
// Stuff the last_modifying_cmd back into stdin
|
||
// and let it be re-executed.
|
||
if (last_modifying_cmd != 0) {
|
||
ioq = ioq_start = (Byte *) strdup((char *) last_modifying_cmd);
|
||
}
|
||
break;
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
#ifdef BB_FEATURE_VI_SEARCH
|
||
case '?': // /- search for a pattern
|
||
case '/': // /- search for a pattern
|
||
buf[0] = c;
|
||
buf[1] = '\0';
|
||
q = get_input_line(buf); // get input line- use "status line"
|
||
if (strlen((char *) q) == 1)
|
||
goto dc3; // if no pat re-use old pat
|
||
if (strlen((char *) q) > 1) { // new pat- save it and find
|
||
// there is a new pat
|
||
if (last_search_pattern != 0) {
|
||
free(last_search_pattern);
|
||
}
|
||
last_search_pattern = (Byte *) strdup((char *) q);
|
||
goto dc3; // now find the pattern
|
||
}
|
||
// user changed mind and erased the "/"- do nothing
|
||
break;
|
||
case 'N': // N- backward search for last pattern
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dir = BACK; // assume BACKWARD search
|
||
p = dot - 1;
|
||
if (last_search_pattern[0] == '?') {
|
||
dir = FORWARD;
|
||
p = dot + 1;
|
||
}
|
||
goto dc4; // now search for pattern
|
||
break;
|
||
case 'n': // n- repeat search for last pattern
|
||
// search rest of text[] starting at next char
|
||
// if search fails return orignal "p" not the "p+1" address
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dc3:
|
||
if (last_search_pattern == 0) {
|
||
msg = (Byte *) "No previous regular expression";
|
||
goto dc2;
|
||
}
|
||
if (last_search_pattern[0] == '/') {
|
||
dir = FORWARD; // assume FORWARD search
|
||
p = dot + 1;
|
||
}
|
||
if (last_search_pattern[0] == '?') {
|
||
dir = BACK;
|
||
p = dot - 1;
|
||
}
|
||
dc4:
|
||
q = char_search(p, last_search_pattern + 1, dir, FULL);
|
||
if (q != NULL) {
|
||
dot = q; // good search, update "dot"
|
||
msg = (Byte *) "";
|
||
goto dc2;
|
||
}
|
||
// no pattern found between "dot" and "end"- continue at top
|
||
p = text;
|
||
if (dir == BACK) {
|
||
p = end - 1;
|
||
}
|
||
q = char_search(p, last_search_pattern + 1, dir, FULL);
|
||
if (q != NULL) { // found something
|
||
dot = q; // found new pattern- goto it
|
||
msg = (Byte *) "search hit BOTTOM, continuing at TOP";
|
||
if (dir == BACK) {
|
||
msg = (Byte *) "search hit TOP, continuing at BOTTOM";
|
||
}
|
||
} else {
|
||
msg = (Byte *) "Pattern not found";
|
||
}
|
||
dc2:
|
||
psbs("%s", msg);
|
||
break;
|
||
case '{': // {- move backward paragraph
|
||
q = char_search(dot, (Byte *) "\n\n", BACK, FULL);
|
||
if (q != NULL) { // found blank line
|
||
dot = next_line(q); // move to next blank line
|
||
}
|
||
break;
|
||
case '}': // }- move forward paragraph
|
||
q = char_search(dot, (Byte *) "\n\n", FORWARD, FULL);
|
||
if (q != NULL) { // found blank line
|
||
dot = next_line(q); // move to next blank line
|
||
}
|
||
break;
|
||
#endif /* BB_FEATURE_VI_SEARCH */
|
||
case '0': // 0- goto begining of line
|
||
case '1': // 1-
|
||
case '2': // 2-
|
||
case '3': // 3-
|
||
case '4': // 4-
|
||
case '5': // 5-
|
||
case '6': // 6-
|
||
case '7': // 7-
|
||
case '8': // 8-
|
||
case '9': // 9-
|
||
if (c == '0' && cmdcnt < 1) {
|
||
dot_begin(); // this was a standalone zero
|
||
} else {
|
||
cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
|
||
}
|
||
break;
|
||
case ':': // :- the colon mode commands
|
||
p = get_input_line((Byte *) ":"); // get input line- use "status line"
|
||
#ifdef BB_FEATURE_VI_COLON
|
||
colon(p); // execute the command
|
||
#else /* BB_FEATURE_VI_COLON */
|
||
if (*p == ':')
|
||
p++; // move past the ':'
|
||
cnt = strlen((char *) p);
|
||
if (cnt <= 0)
|
||
break;
|
||
if (strncasecmp((char *) p, "quit", cnt) == 0 ||
|
||
strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines
|
||
if (file_modified == TRUE && p[1] != '!') {
|
||
psbs("No write since last change (:quit! overrides)");
|
||
} else {
|
||
editing = 0;
|
||
}
|
||
} else if (strncasecmp((char *) p, "write", cnt) == 0 ||
|
||
strncasecmp((char *) p, "wq", cnt) == 0) {
|
||
cnt = file_write(cfn, text, end - 1);
|
||
file_modified = FALSE;
|
||
psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt);
|
||
if (p[1] == 'q') {
|
||
editing = 0;
|
||
}
|
||
} else if (strncasecmp((char *) p, "file", cnt) == 0 ) {
|
||
edit_status(); // show current file status
|
||
} else if (sscanf((char *) p, "%d", &j) > 0) {
|
||
dot = find_line(j); // go to line # j
|
||
dot_skip_over_ws();
|
||
} else { // unrecognised cmd
|
||
ni((Byte *) p);
|
||
}
|
||
#endif /* BB_FEATURE_VI_COLON */
|
||
break;
|
||
case '<': // <- Left shift something
|
||
case '>': // >- Right shift something
|
||
cnt = count_lines(text, dot); // remember what line we are on
|
||
c1 = get_one_char(); // get the type of thing to delete
|
||
find_range(&p, &q, c1);
|
||
(void) yank_delete(p, q, 1, YANKONLY); // save copy before change
|
||
p = begin_line(p);
|
||
q = end_line(q);
|
||
i = count_lines(p, q); // # of lines we are shifting
|
||
for ( ; i > 0; i--, p = next_line(p)) {
|
||
if (c == '<') {
|
||
// shift left- remove tab or 8 spaces
|
||
if (*p == '\t') {
|
||
// shrink buffer 1 char
|
||
(void) text_hole_delete(p, p);
|
||
} else if (*p == ' ') {
|
||
// we should be calculating columns, not just SPACE
|
||
for (j = 0; *p == ' ' && j < tabstop; j++) {
|
||
(void) text_hole_delete(p, p);
|
||
}
|
||
}
|
||
} else if (c == '>') {
|
||
// shift right -- add tab or 8 spaces
|
||
(void) char_insert(p, '\t');
|
||
}
|
||
}
|
||
dot = find_line(cnt); // what line were we on
|
||
dot_skip_over_ws();
|
||
end_cmd_q(); // stop adding to q
|
||
break;
|
||
case 'A': // A- append at e-o-l
|
||
dot_end(); // go to e-o-l
|
||
//**** fall thru to ... 'a'
|
||
case 'a': // a- append after current char
|
||
if (*dot != '\n')
|
||
dot++;
|
||
goto dc_i;
|
||
break;
|
||
case 'B': // B- back a blank-delimited Word
|
||
case 'E': // E- end of a blank-delimited word
|
||
case 'W': // W- forward a blank-delimited word
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dir = FORWARD;
|
||
if (c == 'B')
|
||
dir = BACK;
|
||
if (c == 'W' || isspace(dot[dir])) {
|
||
dot = skip_thing(dot, 1, dir, S_TO_WS);
|
||
dot = skip_thing(dot, 2, dir, S_OVER_WS);
|
||
}
|
||
if (c != 'W')
|
||
dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
|
||
break;
|
||
case 'C': // C- Change to e-o-l
|
||
case 'D': // D- delete to e-o-l
|
||
save_dot = dot;
|
||
dot = dollar_line(dot); // move to before NL
|
||
// copy text into a register and delete
|
||
dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
|
||
if (c == 'C')
|
||
goto dc_i; // start inserting
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
||
if (c == 'D')
|
||
end_cmd_q(); // stop adding to q
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
break;
|
||
case 'G': // G- goto to a line number (default= E-O-F)
|
||
dot = end - 1; // assume E-O-F
|
||
if (cmdcnt > 0) {
|
||
dot = find_line(cmdcnt); // what line is #cmdcnt
|
||
}
|
||
dot_skip_over_ws();
|
||
break;
|
||
case 'H': // H- goto top line on screen
|
||
dot = screenbegin;
|
||
if (cmdcnt > (rows - 1)) {
|
||
cmdcnt = (rows - 1);
|
||
}
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd('+');
|
||
} // repeat cnt
|
||
dot_skip_over_ws();
|
||
break;
|
||
case 'I': // I- insert before first non-blank
|
||
dot_begin(); // 0
|
||
dot_skip_over_ws();
|
||
//**** fall thru to ... 'i'
|
||
case 'i': // i- insert before current char
|
||
case VI_K_INSERT: // Cursor Key Insert
|
||
dc_i:
|
||
cmd_mode = 1; // start insrting
|
||
psb("-- Insert --");
|
||
break;
|
||
case 'J': // J- join current and next lines together
|
||
if (cmdcnt-- > 2) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dot_end(); // move to NL
|
||
if (dot < end - 1) { // make sure not last char in text[]
|
||
*dot++ = ' '; // replace NL with space
|
||
while (isblnk(*dot)) { // delete leading WS
|
||
dot_delete();
|
||
}
|
||
}
|
||
end_cmd_q(); // stop adding to q
|
||
break;
|
||
case 'L': // L- goto bottom line on screen
|
||
dot = end_screen();
|
||
if (cmdcnt > (rows - 1)) {
|
||
cmdcnt = (rows - 1);
|
||
}
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd('-');
|
||
} // repeat cnt
|
||
dot_begin();
|
||
dot_skip_over_ws();
|
||
break;
|
||
case 'M': // M- goto middle line on screen
|
||
dot = screenbegin;
|
||
for (cnt = 0; cnt < (rows-1) / 2; cnt++)
|
||
dot = next_line(dot);
|
||
break;
|
||
case 'O': // O- open a empty line above
|
||
// 0i\n ESC -i
|
||
p = begin_line(dot);
|
||
if (p[-1] == '\n') {
|
||
dot_prev();
|
||
case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
|
||
dot_end();
|
||
dot = char_insert(dot, '\n');
|
||
} else {
|
||
dot_begin(); // 0
|
||
dot = char_insert(dot, '\n'); // i\n ESC
|
||
dot_prev(); // -
|
||
}
|
||
goto dc_i;
|
||
break;
|
||
case 'R': // R- continuous Replace char
|
||
dc5:
|
||
cmd_mode = 2;
|
||
psb("-- Replace --");
|
||
break;
|
||
case 'X': // X- delete char before dot
|
||
case 'x': // x- delete the current char
|
||
case 's': // s- substitute the current char
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dir = 0;
|
||
if (c == 'X')
|
||
dir = -1;
|
||
if (dot[dir] != '\n') {
|
||
if (c == 'X')
|
||
dot--; // delete prev char
|
||
dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
|
||
}
|
||
if (c == 's')
|
||
goto dc_i; // start insrting
|
||
end_cmd_q(); // stop adding to q
|
||
break;
|
||
case 'Z': // Z- if modified, {write}; exit
|
||
// ZZ means to save file (if necessary), then exit
|
||
c1 = get_one_char();
|
||
if (c1 != 'Z') {
|
||
indicate_error(c);
|
||
break;
|
||
}
|
||
if (file_modified == TRUE
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
&& vi_readonly == FALSE
|
||
&& readonly == FALSE
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
) {
|
||
cnt = file_write(cfn, text, end - 1);
|
||
if (cnt == (end - 1 - text + 1)) {
|
||
editing = 0;
|
||
}
|
||
} else {
|
||
editing = 0;
|
||
}
|
||
break;
|
||
case '^': // ^- move to first non-blank on line
|
||
dot_begin();
|
||
dot_skip_over_ws();
|
||
break;
|
||
case 'b': // b- back a word
|
||
case 'e': // e- end of word
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dir = FORWARD;
|
||
if (c == 'b')
|
||
dir = BACK;
|
||
if ((dot + dir) < text || (dot + dir) > end - 1)
|
||
break;
|
||
dot += dir;
|
||
if (isspace(*dot)) {
|
||
dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
|
||
}
|
||
if (isalnum(*dot) || *dot == '_') {
|
||
dot = skip_thing(dot, 1, dir, S_END_ALNUM);
|
||
} else if (ispunct(*dot)) {
|
||
dot = skip_thing(dot, 1, dir, S_END_PUNCT);
|
||
}
|
||
break;
|
||
case 'c': // c- change something
|
||
case 'd': // d- delete something
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
case 'y': // y- yank something
|
||
case 'Y': // Y- Yank a line
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
yf = YANKDEL; // assume either "c" or "d"
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
if (c == 'y' || c == 'Y')
|
||
yf = YANKONLY;
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
c1 = 'y';
|
||
if (c != 'Y')
|
||
c1 = get_one_char(); // get the type of thing to delete
|
||
find_range(&p, &q, c1);
|
||
if (c1 == 27) { // ESC- user changed mind and wants out
|
||
c = c1 = 27; // Escape- do nothing
|
||
} else if (strchr("wW", c1)) {
|
||
if (c == 'c') {
|
||
// don't include trailing WS as part of word
|
||
while (isblnk(*q)) {
|
||
if (q <= text || q[-1] == '\n')
|
||
break;
|
||
q--;
|
||
}
|
||
}
|
||
dot = yank_delete(p, q, 0, yf); // delete word
|
||
} else if (strchr("^0bBeEft$", c1)) {
|
||
// single line copy text into a register and delete
|
||
dot = yank_delete(p, q, 0, yf); // delete word
|
||
} else if (strchr("cdykjHL%+-{}\r\n", c1)) {
|
||
// multiple line copy text into a register and delete
|
||
dot = yank_delete(p, q, 1, yf); // delete lines
|
||
if (c == 'c') {
|
||
dot = char_insert(dot, '\n');
|
||
// on the last line of file don't move to prev line
|
||
if (dot != (end-1)) {
|
||
dot_prev();
|
||
}
|
||
} else if (c == 'd') {
|
||
dot_begin();
|
||
dot_skip_over_ws();
|
||
}
|
||
} else {
|
||
// could not recognize object
|
||
c = c1 = 27; // error-
|
||
indicate_error(c);
|
||
}
|
||
if (c1 != 27) {
|
||
// if CHANGING, not deleting, start inserting after the delete
|
||
if (c == 'c') {
|
||
strcpy((char *) buf, "Change");
|
||
goto dc_i; // start inserting
|
||
}
|
||
if (c == 'd') {
|
||
strcpy((char *) buf, "Delete");
|
||
}
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
if (c == 'y' || c == 'Y') {
|
||
strcpy((char *) buf, "Yank");
|
||
}
|
||
p = reg[YDreg];
|
||
q = p + strlen((char *) p);
|
||
for (cnt = 0; p <= q; p++) {
|
||
if (*p == '\n')
|
||
cnt++;
|
||
}
|
||
psb("%s %d lines (%d chars) using [%c]",
|
||
buf, cnt, strlen((char *) reg[YDreg]), what_reg());
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
end_cmd_q(); // stop adding to q
|
||
}
|
||
break;
|
||
case 'k': // k- goto prev line, same col
|
||
case VI_K_UP: // cursor key Up
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
dot_prev();
|
||
dot = move_to_col(dot, ccol + offset); // try stay in same col
|
||
break;
|
||
case 'r': // r- replace the current char with user input
|
||
c1 = get_one_char(); // get the replacement char
|
||
if (*dot != '\n') {
|
||
*dot = c1;
|
||
file_modified = TRUE; // has the file been modified
|
||
}
|
||
end_cmd_q(); // stop adding to q
|
||
break;
|
||
case 't': // t- move to char prior to next x
|
||
last_forward_char = get_one_char();
|
||
do_cmd(';');
|
||
if (*dot == last_forward_char)
|
||
dot_left();
|
||
last_forward_char= 0;
|
||
break;
|
||
case 'w': // w- forward a word
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
|
||
dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
|
||
} else if (ispunct(*dot)) { // we are on PUNCT
|
||
dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
|
||
}
|
||
if (dot < end - 1)
|
||
dot++; // move over word
|
||
if (isspace(*dot)) {
|
||
dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
|
||
}
|
||
break;
|
||
case 'z': // z-
|
||
c1 = get_one_char(); // get the replacement char
|
||
cnt = 0;
|
||
if (c1 == '.')
|
||
cnt = (rows - 2) / 2; // put dot at center
|
||
if (c1 == '-')
|
||
cnt = rows - 2; // put dot at bottom
|
||
screenbegin = begin_line(dot); // start dot at top
|
||
dot_scroll(cnt, -1);
|
||
break;
|
||
case '|': // |- move to column "cmdcnt"
|
||
dot = move_to_col(dot, cmdcnt - 1); // try to move to column
|
||
break;
|
||
case '~': // ~- flip the case of letters a-z -> A-Z
|
||
if (cmdcnt-- > 1) {
|
||
do_cmd(c);
|
||
} // repeat cnt
|
||
if (islower(*dot)) {
|
||
*dot = toupper(*dot);
|
||
file_modified = TRUE; // has the file been modified
|
||
} else if (isupper(*dot)) {
|
||
*dot = tolower(*dot);
|
||
file_modified = TRUE; // has the file been modified
|
||
}
|
||
dot_right();
|
||
end_cmd_q(); // stop adding to q
|
||
break;
|
||
//----- The Cursor and Function Keys -----------------------------
|
||
case VI_K_HOME: // Cursor Key Home
|
||
dot_begin();
|
||
break;
|
||
// The Fn keys could point to do_macro which could translate them
|
||
case VI_K_FUN1: // Function Key F1
|
||
case VI_K_FUN2: // Function Key F2
|
||
case VI_K_FUN3: // Function Key F3
|
||
case VI_K_FUN4: // Function Key F4
|
||
case VI_K_FUN5: // Function Key F5
|
||
case VI_K_FUN6: // Function Key F6
|
||
case VI_K_FUN7: // Function Key F7
|
||
case VI_K_FUN8: // Function Key F8
|
||
case VI_K_FUN9: // Function Key F9
|
||
case VI_K_FUN10: // Function Key F10
|
||
case VI_K_FUN11: // Function Key F11
|
||
case VI_K_FUN12: // Function Key F12
|
||
break;
|
||
}
|
||
|
||
dc1:
|
||
// if text[] just became empty, add back an empty line
|
||
if (end == text) {
|
||
(void) char_insert(text, '\n'); // start empty buf with dummy line
|
||
dot = text;
|
||
}
|
||
// it is OK for dot to exactly equal to end, otherwise check dot validity
|
||
if (dot != end) {
|
||
dot = bound_dot(dot); // make sure "dot" is valid
|
||
}
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
check_context(c); // update the current context
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
|
||
if (!isdigit(c))
|
||
cmdcnt = 0; // cmd was not a number, reset cmdcnt
|
||
cnt = dot - begin_line(dot);
|
||
// Try to stay off of the Newline
|
||
if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
|
||
dot--;
|
||
}
|
||
|
||
//----- The Colon commands -------------------------------------
|
||
#ifdef BB_FEATURE_VI_COLON
|
||
static Byte *get_one_address(Byte * p, int *addr) // get colon addr, if present
|
||
{
|
||
int st;
|
||
Byte *q;
|
||
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
Byte c;
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
#ifdef BB_FEATURE_VI_SEARCH
|
||
Byte *pat, buf[BUFSIZ];
|
||
#endif /* BB_FEATURE_VI_SEARCH */
|
||
|
||
*addr = -1; // assume no addr
|
||
if (*p == '.') { // the current line
|
||
p++;
|
||
q = begin_line(dot);
|
||
*addr = count_lines(text, q);
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
} else if (*p == '\'') { // is this a mark addr
|
||
p++;
|
||
c = tolower(*p);
|
||
p++;
|
||
if (c >= 'a' && c <= 'z') {
|
||
// we have a mark
|
||
c = c - 'a';
|
||
q = mark[(int) c];
|
||
if (q != NULL) { // is mark valid
|
||
*addr = count_lines(text, q); // count lines
|
||
}
|
||
}
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
#ifdef BB_FEATURE_VI_SEARCH
|
||
} else if (*p == '/') { // a search pattern
|
||
q = buf;
|
||
for (p++; *p; p++) {
|
||
if (*p == '/')
|
||
break;
|
||
*q++ = *p;
|
||
*q = '\0';
|
||
}
|
||
pat = (Byte *) strdup((char *) buf); // save copy of pattern
|
||
if (*p == '/')
|
||
p++;
|
||
q = char_search(dot, pat, FORWARD, FULL);
|
||
if (q != NULL) {
|
||
*addr = count_lines(text, q);
|
||
}
|
||
free(pat);
|
||
#endif /* BB_FEATURE_VI_SEARCH */
|
||
} else if (*p == '$') { // the last line in file
|
||
p++;
|
||
q = begin_line(end - 1);
|
||
*addr = count_lines(text, q);
|
||
} else if (isdigit(*p)) { // specific line number
|
||
sscanf((char *) p, "%d%n", addr, &st);
|
||
p += st;
|
||
} else { // I don't reconise this
|
||
// unrecognised address- assume -1
|
||
*addr = -1;
|
||
}
|
||
return (p);
|
||
}
|
||
|
||
static Byte *get_address(Byte *p, int *b, int *e) // get two colon addrs, if present
|
||
{
|
||
//----- get the address' i.e., 1,3 'a,'b -----
|
||
// get FIRST addr, if present
|
||
while (isblnk(*p))
|
||
p++; // skip over leading spaces
|
||
if (*p == '%') { // alias for 1,$
|
||
p++;
|
||
*b = 1;
|
||
*e = count_lines(text, end-1);
|
||
goto ga0;
|
||
}
|
||
p = get_one_address(p, b);
|
||
while (isblnk(*p))
|
||
p++;
|
||
if (*p == ',') { // is there a address seperator
|
||
p++;
|
||
while (isblnk(*p))
|
||
p++;
|
||
// get SECOND addr, if present
|
||
p = get_one_address(p, e);
|
||
}
|
||
ga0:
|
||
while (isblnk(*p))
|
||
p++; // skip over trailing spaces
|
||
return (p);
|
||
}
|
||
|
||
static void colon(Byte * buf)
|
||
{
|
||
Byte c, *orig_buf, *buf1, *q, *r;
|
||
Byte *fn, cmd[BUFSIZ], args[BUFSIZ];
|
||
int i, l, li, ch, st, b, e;
|
||
int useforce, forced;
|
||
struct stat st_buf;
|
||
|
||
// :3154 // if (-e line 3154) goto it else stay put
|
||
// :4,33w! foo // write a portion of buffer to file "foo"
|
||
// :w // write all of buffer to current file
|
||
// :q // quit
|
||
// :q! // quit- dont care about modified file
|
||
// :'a,'z!sort -u // filter block through sort
|
||
// :'f // goto mark "f"
|
||
// :'fl // list literal the mark "f" line
|
||
// :.r bar // read file "bar" into buffer before dot
|
||
// :/123/,/abc/d // delete lines from "123" line to "abc" line
|
||
// :/xyz/ // goto the "xyz" line
|
||
// :s/find/replace/ // substitute pattern "find" with "replace"
|
||
// :!<cmd> // run <cmd> then return
|
||
//
|
||
if (strlen((char *) buf) <= 0)
|
||
goto vc1;
|
||
if (*buf == ':')
|
||
buf++; // move past the ':'
|
||
|
||
forced = useforce = FALSE;
|
||
li = st = ch = i = 0;
|
||
b = e = -1;
|
||
q = text; // assume 1,$ for the range
|
||
r = end - 1;
|
||
li = count_lines(text, end - 1);
|
||
fn = cfn; // default to current file
|
||
memset(cmd, '\0', BUFSIZ); // clear cmd[]
|
||
memset(args, '\0', BUFSIZ); // clear args[]
|
||
|
||
// look for optional address(es) :. :1 :1,9 :'q,'a :%
|
||
buf = get_address(buf, &b, &e);
|
||
|
||
// remember orig command line
|
||
orig_buf = buf;
|
||
|
||
// get the COMMAND into cmd[]
|
||
buf1 = cmd;
|
||
while (*buf != '\0') {
|
||
if (isspace(*buf))
|
||
break;
|
||
*buf1++ = *buf++;
|
||
}
|
||
// get any ARGuments
|
||
while (isblnk(*buf))
|
||
buf++;
|
||
strcpy((char *) args, (char *) buf);
|
||
buf1 = last_char_is((char *)cmd, '!');
|
||
if (buf1) {
|
||
useforce = TRUE;
|
||
*buf1 = '\0'; // get rid of !
|
||
}
|
||
if (b >= 0) {
|
||
// if there is only one addr, then the addr
|
||
// is the line number of the single line the
|
||
// user wants. So, reset the end
|
||
// pointer to point at end of the "b" line
|
||
q = find_line(b); // what line is #b
|
||
r = end_line(q);
|
||
li = 1;
|
||
}
|
||
if (e >= 0) {
|
||
// we were given two addrs. change the
|
||
// end pointer to the addr given by user.
|
||
r = find_line(e); // what line is #e
|
||
r = end_line(r);
|
||
li = e - b + 1;
|
||
}
|
||
// ------------ now look for the command ------------
|
||
i = strlen((char *) cmd);
|
||
if (i == 0) { // :123CR goto line #123
|
||
if (b >= 0) {
|
||
dot = find_line(b); // what line is #b
|
||
dot_skip_over_ws();
|
||
}
|
||
} else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd
|
||
// :!ls run the <cmd>
|
||
(void) alarm(0); // wait for input- no alarms
|
||
place_cursor(rows - 1, 0, FALSE); // go to Status line
|
||
clear_to_eol(); // clear the line
|
||
cookmode();
|
||
system(orig_buf+1); // run the cmd
|
||
rawmode();
|
||
Hit_Return(); // let user see results
|
||
(void) alarm(3); // done waiting for input
|
||
} else if (strncmp((char *) cmd, "=", i) == 0) { // where is the address
|
||
if (b < 0) { // no addr given- use defaults
|
||
b = e = count_lines(text, dot);
|
||
}
|
||
psb("%d", b);
|
||
} else if (strncasecmp((char *) cmd, "delete", i) == 0) { // delete lines
|
||
if (b < 0) { // no addr given- use defaults
|
||
q = begin_line(dot); // assume .,. for the range
|
||
r = end_line(dot);
|
||
}
|
||
dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
|
||
dot_skip_over_ws();
|
||
} else if (strncasecmp((char *) cmd, "edit", i) == 0) { // Edit a file
|
||
int sr;
|
||
sr= 0;
|
||
// don't edit, if the current file has been modified
|
||
if (file_modified == TRUE && useforce != TRUE) {
|
||
psbs("No write since last change (:edit! overrides)");
|
||
goto vc1;
|
||
}
|
||
if (strlen(args) > 0) {
|
||
// the user supplied a file name
|
||
fn= args;
|
||
} else if (cfn != 0 && strlen(cfn) > 0) {
|
||
// no user supplied name- use the current filename
|
||
fn= cfn;
|
||
goto vc5;
|
||
} else {
|
||
// no user file name, no current name- punt
|
||
psbs("No current filename");
|
||
goto vc1;
|
||
}
|
||
|
||
// see if file exists- if not, its just a new file request
|
||
if ((sr=stat((char*)fn, &st_buf)) < 0) {
|
||
// This is just a request for a new file creation.
|
||
// The file_insert below will fail but we get
|
||
// an empty buffer with a file name. Then the "write"
|
||
// command can do the create.
|
||
} else {
|
||
if ((st_buf.st_mode & (S_IFREG)) == 0) {
|
||
// This is not a regular file
|
||
psbs("\"%s\" is not a regular file", fn);
|
||
goto vc1;
|
||
}
|
||
if ((st_buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) {
|
||
// dont have any read permissions
|
||
psbs("\"%s\" is not readable", fn);
|
||
goto vc1;
|
||
}
|
||
}
|
||
|
||
// There is a read-able regular file
|
||
// make this the current file
|
||
q = (Byte *) strdup((char *) fn); // save the cfn
|
||
if (cfn != 0)
|
||
free(cfn); // free the old name
|
||
cfn = q; // remember new cfn
|
||
|
||
vc5:
|
||
// delete all the contents of text[]
|
||
new_text(2 * file_size(fn));
|
||
screenbegin = dot = end = text;
|
||
|
||
// insert new file
|
||
ch = file_insert(fn, text, file_size(fn));
|
||
|
||
if (ch < 1) {
|
||
// start empty buf with dummy line
|
||
(void) char_insert(text, '\n');
|
||
ch= 1;
|
||
}
|
||
file_modified = FALSE;
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
|
||
free(reg[Ureg]); // free orig line reg- for 'U'
|
||
reg[Ureg]= 0;
|
||
}
|
||
if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
|
||
free(reg[YDreg]); // free default yank/delete register
|
||
reg[YDreg]= 0;
|
||
}
|
||
for (li = 0; li < 28; li++) {
|
||
mark[li] = 0;
|
||
} // init the marks
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
// how many lines in text[]?
|
||
li = count_lines(text, end - 1);
|
||
psb("\"%s\"%s"
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
"%s"
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
" %dL, %dC", cfn,
|
||
(sr < 0 ? " [New file]" : ""),
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
li, ch);
|
||
} else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this
|
||
if (b != -1 || e != -1) {
|
||
ni((Byte *) "No address allowed on this command");
|
||
goto vc1;
|
||
}
|
||
if (strlen((char *) args) > 0) {
|
||
// user wants a new filename
|
||
if (cfn != NULL)
|
||
free(cfn);
|
||
cfn = (Byte *) strdup((char *) args);
|
||
} else {
|
||
// user wants file status info
|
||
edit_status();
|
||
}
|
||
} else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available
|
||
// print out values of all features
|
||
place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
|
||
clear_to_eol(); // clear the line
|
||
cookmode();
|
||
show_help();
|
||
rawmode();
|
||
Hit_Return();
|
||
} else if (strncasecmp((char *) cmd, "list", i) == 0) { // literal print line
|
||
if (b < 0) { // no addr given- use defaults
|
||
q = begin_line(dot); // assume .,. for the range
|
||
r = end_line(dot);
|
||
}
|
||
place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
|
||
clear_to_eol(); // clear the line
|
||
write(1, "\r\n", 2);
|
||
for (; q <= r; q++) {
|
||
c = *q;
|
||
if (c > '~')
|
||
standout_start();
|
||
if (c == '\n') {
|
||
write(1, "$\r", 2);
|
||
} else if (*q < ' ') {
|
||
write(1, "^", 1);
|
||
c += '@';
|
||
}
|
||
write(1, &c, 1);
|
||
if (c > '~')
|
||
standout_end();
|
||
}
|
||
#ifdef BB_FEATURE_VI_SET
|
||
vc2:
|
||
#endif /* BB_FEATURE_VI_SET */
|
||
Hit_Return();
|
||
} else if ((strncasecmp((char *) cmd, "quit", i) == 0) || // Quit
|
||
(strncasecmp((char *) cmd, "next", i) == 0)) { // edit next file
|
||
if (useforce == TRUE) {
|
||
// force end of argv list
|
||
if (*cmd == 'q') {
|
||
optind = save_argc;
|
||
}
|
||
editing = 0;
|
||
goto vc1;
|
||
}
|
||
// don't exit if the file been modified
|
||
if (file_modified == TRUE) {
|
||
psbs("No write since last change (:%s! overrides)",
|
||
(*cmd == 'q' ? "quit" : "next"));
|
||
goto vc1;
|
||
}
|
||
// are there other file to edit
|
||
if (*cmd == 'q' && optind < save_argc - 1) {
|
||
psbs("%d more file to edit", (save_argc - optind - 1));
|
||
goto vc1;
|
||
}
|
||
if (*cmd == 'n' && optind >= save_argc - 1) {
|
||
psbs("No more files to edit");
|
||
goto vc1;
|
||
}
|
||
editing = 0;
|
||
} else if (strncasecmp((char *) cmd, "read", i) == 0) { // read file into text[]
|
||
fn = args;
|
||
if (strlen((char *) fn) <= 0) {
|
||
psbs("No filename given");
|
||
goto vc1;
|
||
}
|
||
if (b < 0) { // no addr given- use defaults
|
||
q = begin_line(dot); // assume "dot"
|
||
}
|
||
// read after current line- unless user said ":0r foo"
|
||
if (b != 0)
|
||
q = next_line(q);
|
||
l= readonly; // remember current files' status
|
||
ch = file_insert(fn, q, file_size(fn));
|
||
readonly= l;
|
||
if (ch < 0)
|
||
goto vc1; // nothing was inserted
|
||
// how many lines in text[]?
|
||
li = count_lines(q, q + ch - 1);
|
||
psb("\"%s\""
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
"%s"
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
" %dL, %dC", fn,
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
li, ch);
|
||
if (ch > 0) {
|
||
// if the insert is before "dot" then we need to update
|
||
if (q <= dot)
|
||
dot += ch;
|
||
file_modified = TRUE;
|
||
}
|
||
} else if (strncasecmp((char *) cmd, "rewind", i) == 0) { // rewind cmd line args
|
||
if (file_modified == TRUE && useforce != TRUE) {
|
||
psbs("No write since last change (:rewind! overrides)");
|
||
} else {
|
||
// reset the filenames to edit
|
||
optind = fn_start - 1;
|
||
editing = 0;
|
||
}
|
||
#ifdef BB_FEATURE_VI_SET
|
||
} else if (strncasecmp((char *) cmd, "set", i) == 0) { // set or clear features
|
||
i = 0; // offset into args
|
||
if (strlen((char *) args) == 0) {
|
||
// print out values of all options
|
||
place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
|
||
clear_to_eol(); // clear the line
|
||
printf("----------------------------------------\r\n");
|
||
#ifdef BB_FEATURE_VI_SETOPTS
|
||
if (!autoindent)
|
||
printf("no");
|
||
printf("autoindent ");
|
||
if (!err_method)
|
||
printf("no");
|
||
printf("flash ");
|
||
if (!ignorecase)
|
||
printf("no");
|
||
printf("ignorecase ");
|
||
if (!showmatch)
|
||
printf("no");
|
||
printf("showmatch ");
|
||
printf("tabstop=%d ", tabstop);
|
||
#endif /* BB_FEATURE_VI_SETOPTS */
|
||
printf("\r\n");
|
||
goto vc2;
|
||
}
|
||
if (strncasecmp((char *) args, "no", 2) == 0)
|
||
i = 2; // ":set noautoindent"
|
||
#ifdef BB_FEATURE_VI_SETOPTS
|
||
if (strncasecmp((char *) args + i, "autoindent", 10) == 0 ||
|
||
strncasecmp((char *) args + i, "ai", 2) == 0) {
|
||
autoindent = (i == 2) ? 0 : 1;
|
||
}
|
||
if (strncasecmp((char *) args + i, "flash", 5) == 0 ||
|
||
strncasecmp((char *) args + i, "fl", 2) == 0) {
|
||
err_method = (i == 2) ? 0 : 1;
|
||
}
|
||
if (strncasecmp((char *) args + i, "ignorecase", 10) == 0 ||
|
||
strncasecmp((char *) args + i, "ic", 2) == 0) {
|
||
ignorecase = (i == 2) ? 0 : 1;
|
||
}
|
||
if (strncasecmp((char *) args + i, "showmatch", 9) == 0 ||
|
||
strncasecmp((char *) args + i, "sm", 2) == 0) {
|
||
showmatch = (i == 2) ? 0 : 1;
|
||
}
|
||
if (strncasecmp((char *) args + i, "tabstop", 7) == 0) {
|
||
sscanf(strchr((char *) args + i, '='), "=%d", &ch);
|
||
if (ch > 0 && ch < columns - 1)
|
||
tabstop = ch;
|
||
}
|
||
#endif /* BB_FEATURE_VI_SETOPTS */
|
||
#endif /* BB_FEATURE_VI_SET */
|
||
#ifdef BB_FEATURE_VI_SEARCH
|
||
} else if (strncasecmp((char *) cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
|
||
Byte *ls, *F, *R;
|
||
int gflag;
|
||
|
||
// F points to the "find" pattern
|
||
// R points to the "replace" pattern
|
||
// replace the cmd line delimiters "/" with NULLs
|
||
gflag = 0; // global replace flag
|
||
c = orig_buf[1]; // what is the delimiter
|
||
F = orig_buf + 2; // start of "find"
|
||
R = (Byte *) strchr((char *) F, c); // middle delimiter
|
||
if (!R) goto colon_s_fail;
|
||
*R++ = '\0'; // terminate "find"
|
||
buf1 = (Byte *) strchr((char *) R, c);
|
||
if (!buf1) goto colon_s_fail;
|
||
*buf1++ = '\0'; // terminate "replace"
|
||
if (*buf1 == 'g') { // :s/foo/bar/g
|
||
buf1++;
|
||
gflag++; // turn on gflag
|
||
}
|
||
q = begin_line(q);
|
||
if (b < 0) { // maybe :s/foo/bar/
|
||
q = begin_line(dot); // start with cur line
|
||
b = count_lines(text, q); // cur line number
|
||
}
|
||
if (e < 0)
|
||
e = b; // maybe :.s/foo/bar/
|
||
for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
|
||
ls = q; // orig line start
|
||
vc4:
|
||
buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
|
||
if (buf1 != NULL) {
|
||
// we found the "find" pattern- delete it
|
||
(void) text_hole_delete(buf1, buf1 + strlen((char *) F) - 1);
|
||
// inset the "replace" patern
|
||
(void) string_insert(buf1, R); // insert the string
|
||
// check for "global" :s/foo/bar/g
|
||
if (gflag == 1) {
|
||
if ((buf1 + strlen((char *) R)) < end_line(ls)) {
|
||
q = buf1 + strlen((char *) R);
|
||
goto vc4; // don't let q move past cur line
|
||
}
|
||
}
|
||
}
|
||
q = next_line(ls);
|
||
}
|
||
#endif /* BB_FEATURE_VI_SEARCH */
|
||
} else if (strncasecmp((char *) cmd, "version", i) == 0) { // show software version
|
||
psb("%s", vi_Version);
|
||
} else if ((strncasecmp((char *) cmd, "write", i) == 0) || // write text to file
|
||
(strncasecmp((char *) cmd, "wq", i) == 0)) { // write text to file
|
||
// is there a file name to write to?
|
||
if (strlen((char *) args) > 0) {
|
||
fn = args;
|
||
}
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
if ((vi_readonly == TRUE || readonly == TRUE) && useforce == FALSE) {
|
||
psbs("\"%s\" File is read only", fn);
|
||
goto vc3;
|
||
}
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
// how many lines in text[]?
|
||
li = count_lines(q, r);
|
||
ch = r - q + 1;
|
||
// see if file exists- if not, its just a new file request
|
||
if (useforce == TRUE) {
|
||
// if "fn" is not write-able, chmod u+w
|
||
// sprintf(syscmd, "chmod u+w %s", fn);
|
||
// system(syscmd);
|
||
forced = TRUE;
|
||
}
|
||
l = file_write(fn, q, r);
|
||
if (useforce == TRUE && forced == TRUE) {
|
||
// chmod u-w
|
||
// sprintf(syscmd, "chmod u-w %s", fn);
|
||
// system(syscmd);
|
||
forced = FALSE;
|
||
}
|
||
psb("\"%s\" %dL, %dC", fn, li, l);
|
||
if (q == text && r == end - 1 && l == ch)
|
||
file_modified = FALSE;
|
||
if (cmd[1] == 'q' && l == ch) {
|
||
editing = 0;
|
||
}
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
vc3:;
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
} else if (strncasecmp((char *) cmd, "yank", i) == 0) { // yank lines
|
||
if (b < 0) { // no addr given- use defaults
|
||
q = begin_line(dot); // assume .,. for the range
|
||
r = end_line(dot);
|
||
}
|
||
text_yank(q, r, YDreg);
|
||
li = count_lines(q, r);
|
||
psb("Yank %d lines (%d chars) into [%c]",
|
||
li, strlen((char *) reg[YDreg]), what_reg());
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
} else {
|
||
// cmd unknown
|
||
ni((Byte *) cmd);
|
||
}
|
||
vc1:
|
||
dot = bound_dot(dot); // make sure "dot" is valid
|
||
return;
|
||
#ifdef BB_FEATURE_VI_SEARCH
|
||
colon_s_fail:
|
||
psb(":s expression missing delimiters");
|
||
return;
|
||
#endif
|
||
|
||
}
|
||
|
||
static void Hit_Return(void)
|
||
{
|
||
char c;
|
||
|
||
standout_start(); // start reverse video
|
||
write(1, "[Hit return to continue]", 24);
|
||
standout_end(); // end reverse video
|
||
while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */
|
||
;
|
||
redraw(TRUE); // force redraw all
|
||
}
|
||
#endif /* BB_FEATURE_VI_COLON */
|
||
|
||
//----- Synchronize the cursor to Dot --------------------------
|
||
static void sync_cursor(Byte * d, int *row, int *col)
|
||
{
|
||
Byte *beg_cur, *end_cur; // begin and end of "d" line
|
||
Byte *beg_scr, *end_scr; // begin and end of screen
|
||
Byte *tp;
|
||
int cnt, ro, co;
|
||
|
||
beg_cur = begin_line(d); // first char of cur line
|
||
end_cur = end_line(d); // last char of cur line
|
||
|
||
beg_scr = end_scr = screenbegin; // first char of screen
|
||
end_scr = end_screen(); // last char of screen
|
||
|
||
if (beg_cur < screenbegin) {
|
||
// "d" is before top line on screen
|
||
// how many lines do we have to move
|
||
cnt = count_lines(beg_cur, screenbegin);
|
||
sc1:
|
||
screenbegin = beg_cur;
|
||
if (cnt > (rows - 1) / 2) {
|
||
// we moved too many lines. put "dot" in middle of screen
|
||
for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
|
||
screenbegin = prev_line(screenbegin);
|
||
}
|
||
}
|
||
} else if (beg_cur > end_scr) {
|
||
// "d" is after bottom line on screen
|
||
// how many lines do we have to move
|
||
cnt = count_lines(end_scr, beg_cur);
|
||
if (cnt > (rows - 1) / 2)
|
||
goto sc1; // too many lines
|
||
for (ro = 0; ro < cnt - 1; ro++) {
|
||
// move screen begin the same amount
|
||
screenbegin = next_line(screenbegin);
|
||
// now, move the end of screen
|
||
end_scr = next_line(end_scr);
|
||
end_scr = end_line(end_scr);
|
||
}
|
||
}
|
||
// "d" is on screen- find out which row
|
||
tp = screenbegin;
|
||
for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
|
||
if (tp == beg_cur)
|
||
break;
|
||
tp = next_line(tp);
|
||
}
|
||
|
||
// find out what col "d" is on
|
||
co = 0;
|
||
do { // drive "co" to correct column
|
||
if (*tp == '\n' || *tp == '\0')
|
||
break;
|
||
if (*tp == '\t') {
|
||
// 7 - (co % 8 )
|
||
co += ((tabstop - 1) - (co % tabstop));
|
||
} else if (*tp < ' ') {
|
||
co++; // display as ^X, use 2 columns
|
||
}
|
||
} while (tp++ < d && ++co);
|
||
|
||
// "co" is the column where "dot" is.
|
||
// The screen has "columns" columns.
|
||
// The currently displayed columns are 0+offset -- columns+ofset
|
||
// |-------------------------------------------------------------|
|
||
// ^ ^ ^
|
||
// offset | |------- columns ----------------|
|
||
//
|
||
// If "co" is already in this range then we do not have to adjust offset
|
||
// but, we do have to subtract the "offset" bias from "co".
|
||
// If "co" is outside this range then we have to change "offset".
|
||
// If the first char of a line is a tab the cursor will try to stay
|
||
// in column 7, but we have to set offset to 0.
|
||
|
||
if (co < 0 + offset) {
|
||
offset = co;
|
||
}
|
||
if (co >= columns + offset) {
|
||
offset = co - columns + 1;
|
||
}
|
||
// if the first char of the line is a tab, and "dot" is sitting on it
|
||
// force offset to 0.
|
||
if (d == beg_cur && *d == '\t') {
|
||
offset = 0;
|
||
}
|
||
co -= offset;
|
||
|
||
*row = ro;
|
||
*col = co;
|
||
}
|
||
|
||
//----- Text Movement Routines ---------------------------------
|
||
static Byte *begin_line(Byte * p) // return pointer to first char cur line
|
||
{
|
||
while (p > text && p[-1] != '\n')
|
||
p--; // go to cur line B-o-l
|
||
return (p);
|
||
}
|
||
|
||
static Byte *end_line(Byte * p) // return pointer to NL of cur line line
|
||
{
|
||
while (p < end - 1 && *p != '\n')
|
||
p++; // go to cur line E-o-l
|
||
return (p);
|
||
}
|
||
|
||
static Byte *dollar_line(Byte * p) // return pointer to just before NL line
|
||
{
|
||
while (p < end - 1 && *p != '\n')
|
||
p++; // go to cur line E-o-l
|
||
// Try to stay off of the Newline
|
||
if (*p == '\n' && (p - begin_line(p)) > 0)
|
||
p--;
|
||
return (p);
|
||
}
|
||
|
||
static Byte *prev_line(Byte * p) // return pointer first char prev line
|
||
{
|
||
p = begin_line(p); // goto begining of cur line
|
||
if (p[-1] == '\n' && p > text)
|
||
p--; // step to prev line
|
||
p = begin_line(p); // goto begining of prev line
|
||
return (p);
|
||
}
|
||
|
||
static Byte *next_line(Byte * p) // return pointer first char next line
|
||
{
|
||
p = end_line(p);
|
||
if (*p == '\n' && p < end - 1)
|
||
p++; // step to next line
|
||
return (p);
|
||
}
|
||
|
||
//----- Text Information Routines ------------------------------
|
||
static Byte *end_screen(void)
|
||
{
|
||
Byte *q;
|
||
int cnt;
|
||
|
||
// find new bottom line
|
||
q = screenbegin;
|
||
for (cnt = 0; cnt < rows - 2; cnt++)
|
||
q = next_line(q);
|
||
q = end_line(q);
|
||
return (q);
|
||
}
|
||
|
||
static int count_lines(Byte * start, Byte * stop) // count line from start to stop
|
||
{
|
||
Byte *q;
|
||
int cnt;
|
||
|
||
if (stop < start) { // start and stop are backwards- reverse them
|
||
q = start;
|
||
start = stop;
|
||
stop = q;
|
||
}
|
||
cnt = 0;
|
||
stop = end_line(stop); // get to end of this line
|
||
for (q = start; q <= stop && q <= end - 1; q++) {
|
||
if (*q == '\n')
|
||
cnt++;
|
||
}
|
||
return (cnt);
|
||
}
|
||
|
||
static Byte *find_line(int li) // find begining of line #li
|
||
{
|
||
Byte *q;
|
||
|
||
for (q = text; li > 1; li--) {
|
||
q = next_line(q);
|
||
}
|
||
return (q);
|
||
}
|
||
|
||
//----- Dot Movement Routines ----------------------------------
|
||
static void dot_left(void)
|
||
{
|
||
if (dot > text && dot[-1] != '\n')
|
||
dot--;
|
||
}
|
||
|
||
static void dot_right(void)
|
||
{
|
||
if (dot < end - 1 && *dot != '\n')
|
||
dot++;
|
||
}
|
||
|
||
static void dot_begin(void)
|
||
{
|
||
dot = begin_line(dot); // return pointer to first char cur line
|
||
}
|
||
|
||
static void dot_end(void)
|
||
{
|
||
dot = end_line(dot); // return pointer to last char cur line
|
||
}
|
||
|
||
static Byte *move_to_col(Byte * p, int l)
|
||
{
|
||
int co;
|
||
|
||
p = begin_line(p);
|
||
co = 0;
|
||
do {
|
||
if (*p == '\n' || *p == '\0')
|
||
break;
|
||
if (*p == '\t') {
|
||
// 7 - (co % 8 )
|
||
co += ((tabstop - 1) - (co % tabstop));
|
||
} else if (*p < ' ') {
|
||
co++; // display as ^X, use 2 columns
|
||
}
|
||
} while (++co <= l && p++ < end);
|
||
return (p);
|
||
}
|
||
|
||
static void dot_next(void)
|
||
{
|
||
dot = next_line(dot);
|
||
}
|
||
|
||
static void dot_prev(void)
|
||
{
|
||
dot = prev_line(dot);
|
||
}
|
||
|
||
static void dot_scroll(int cnt, int dir)
|
||
{
|
||
Byte *q;
|
||
|
||
for (; cnt > 0; cnt--) {
|
||
if (dir < 0) {
|
||
// scroll Backwards
|
||
// ctrl-Y scroll up one line
|
||
screenbegin = prev_line(screenbegin);
|
||
} else {
|
||
// scroll Forwards
|
||
// ctrl-E scroll down one line
|
||
screenbegin = next_line(screenbegin);
|
||
}
|
||
}
|
||
// make sure "dot" stays on the screen so we dont scroll off
|
||
if (dot < screenbegin)
|
||
dot = screenbegin;
|
||
q = end_screen(); // find new bottom line
|
||
if (dot > q)
|
||
dot = begin_line(q); // is dot is below bottom line?
|
||
dot_skip_over_ws();
|
||
}
|
||
|
||
static void dot_skip_over_ws(void)
|
||
{
|
||
// skip WS
|
||
while (isspace(*dot) && *dot != '\n' && dot < end - 1)
|
||
dot++;
|
||
}
|
||
|
||
static void dot_delete(void) // delete the char at 'dot'
|
||
{
|
||
(void) text_hole_delete(dot, dot);
|
||
}
|
||
|
||
static Byte *bound_dot(Byte * p) // make sure text[0] <= P < "end"
|
||
{
|
||
if (p >= end && end > text) {
|
||
p = end - 1;
|
||
indicate_error('1');
|
||
}
|
||
if (p < text) {
|
||
p = text;
|
||
indicate_error('2');
|
||
}
|
||
return (p);
|
||
}
|
||
|
||
//----- Helper Utility Routines --------------------------------
|
||
|
||
//----------------------------------------------------------------
|
||
//----- Char Routines --------------------------------------------
|
||
/* Chars that are part of a word-
|
||
* 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
|
||
* Chars that are Not part of a word (stoppers)
|
||
* !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
|
||
* Chars that are WhiteSpace
|
||
* TAB NEWLINE VT FF RETURN SPACE
|
||
* DO NOT COUNT NEWLINE AS WHITESPACE
|
||
*/
|
||
|
||
static Byte *new_screen(int ro, int co)
|
||
{
|
||
int li;
|
||
|
||
if (screen != 0)
|
||
free(screen);
|
||
screensize = ro * co + 8;
|
||
screen = (Byte *) malloc(screensize);
|
||
// initialize the new screen. assume this will be a empty file.
|
||
screen_erase();
|
||
// non-existant text[] lines start with a tilde (~).
|
||
for (li = 1; li < ro - 1; li++) {
|
||
screen[(li * co) + 0] = '~';
|
||
}
|
||
return (screen);
|
||
}
|
||
|
||
static Byte *new_text(int size)
|
||
{
|
||
if (size < 10240)
|
||
size = 10240; // have a minimum size for new files
|
||
if (text != 0) {
|
||
//text -= 4;
|
||
free(text);
|
||
}
|
||
text = (Byte *) malloc(size + 8);
|
||
memset(text, '\0', size); // clear new text[]
|
||
//text += 4; // leave some room for "oops"
|
||
textend = text + size - 1;
|
||
//textend -= 4; // leave some root for "oops"
|
||
return (text);
|
||
}
|
||
|
||
#ifdef BB_FEATURE_VI_SEARCH
|
||
static int mycmp(Byte * s1, Byte * s2, int len)
|
||
{
|
||
int i;
|
||
|
||
i = strncmp((char *) s1, (char *) s2, len);
|
||
#ifdef BB_FEATURE_VI_SETOPTS
|
||
if (ignorecase) {
|
||
i = strncasecmp((char *) s1, (char *) s2, len);
|
||
}
|
||
#endif /* BB_FEATURE_VI_SETOPTS */
|
||
return (i);
|
||
}
|
||
|
||
static Byte *char_search(Byte * p, Byte * pat, int dir, int range) // search for pattern starting at p
|
||
{
|
||
#ifndef REGEX_SEARCH
|
||
Byte *start, *stop;
|
||
int len;
|
||
|
||
len = strlen((char *) pat);
|
||
if (dir == FORWARD) {
|
||
stop = end - 1; // assume range is p - end-1
|
||
if (range == LIMITED)
|
||
stop = next_line(p); // range is to next line
|
||
for (start = p; start < stop; start++) {
|
||
if (mycmp(start, pat, len) == 0) {
|
||
return (start);
|
||
}
|
||
}
|
||
} else if (dir == BACK) {
|
||
stop = text; // assume range is text - p
|
||
if (range == LIMITED)
|
||
stop = prev_line(p); // range is to prev line
|
||
for (start = p - len; start >= stop; start--) {
|
||
if (mycmp(start, pat, len) == 0) {
|
||
return (start);
|
||
}
|
||
}
|
||
}
|
||
// pattern not found
|
||
return (NULL);
|
||
#else /*REGEX_SEARCH */
|
||
char *q;
|
||
struct re_pattern_buffer preg;
|
||
int i;
|
||
int size, range;
|
||
|
||
re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
|
||
preg.translate = 0;
|
||
preg.fastmap = 0;
|
||
preg.buffer = 0;
|
||
preg.allocated = 0;
|
||
|
||
// assume a LIMITED forward search
|
||
q = next_line(p);
|
||
q = end_line(q);
|
||
q = end - 1;
|
||
if (dir == BACK) {
|
||
q = prev_line(p);
|
||
q = text;
|
||
}
|
||
// count the number of chars to search over, forward or backward
|
||
size = q - p;
|
||
if (size < 0)
|
||
size = p - q;
|
||
// RANGE could be negative if we are searching backwards
|
||
range = q - p;
|
||
|
||
q = (char *) re_compile_pattern(pat, strlen((char *) pat), &preg);
|
||
if (q != 0) {
|
||
// The pattern was not compiled
|
||
psbs("bad search pattern: \"%s\": %s", pat, q);
|
||
i = 0; // return p if pattern not compiled
|
||
goto cs1;
|
||
}
|
||
|
||
q = p;
|
||
if (range < 0) {
|
||
q = p - size;
|
||
if (q < text)
|
||
q = text;
|
||
}
|
||
// search for the compiled pattern, preg, in p[]
|
||
// range < 0- search backward
|
||
// range > 0- search forward
|
||
// 0 < start < size
|
||
// re_search() < 0 not found or error
|
||
// re_search() > 0 index of found pattern
|
||
// struct pattern char int int int struct reg
|
||
// re_search (*pattern_buffer, *string, size, start, range, *regs)
|
||
i = re_search(&preg, q, size, 0, range, 0);
|
||
if (i == -1) {
|
||
p = 0;
|
||
i = 0; // return NULL if pattern not found
|
||
}
|
||
cs1:
|
||
if (dir == FORWARD) {
|
||
p = p + i;
|
||
} else {
|
||
p = p - i;
|
||
}
|
||
return (p);
|
||
#endif /*REGEX_SEARCH */
|
||
}
|
||
#endif /* BB_FEATURE_VI_SEARCH */
|
||
|
||
static Byte *char_insert(Byte * p, Byte c) // insert the char c at 'p'
|
||
{
|
||
if (c == 22) { // Is this an ctrl-V?
|
||
p = stupid_insert(p, '^'); // use ^ to indicate literal next
|
||
p--; // backup onto ^
|
||
refresh(FALSE); // show the ^
|
||
c = get_one_char();
|
||
*p = c;
|
||
p++;
|
||
file_modified = TRUE; // has the file been modified
|
||
} else if (c == 27) { // Is this an ESC?
|
||
cmd_mode = 0;
|
||
cmdcnt = 0;
|
||
end_cmd_q(); // stop adding to q
|
||
strcpy((char *) status_buffer, " "); // clear the status buffer
|
||
if (p[-1] != '\n') {
|
||
p--;
|
||
}
|
||
} else if (c == erase_char) { // Is this a BS
|
||
// 123456789
|
||
if (p[-1] != '\n') {
|
||
p--;
|
||
p = text_hole_delete(p, p); // shrink buffer 1 char
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
||
// also rmove char from last_modifying_cmd
|
||
if (strlen((char *) last_modifying_cmd) > 0) {
|
||
Byte *q;
|
||
|
||
q = last_modifying_cmd;
|
||
q[strlen((char *) q) - 1] = '\0'; // erase BS
|
||
q[strlen((char *) q) - 1] = '\0'; // erase prev char
|
||
}
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
}
|
||
} else {
|
||
// insert a char into text[]
|
||
Byte *sp; // "save p"
|
||
|
||
if (c == 13)
|
||
c = '\n'; // translate \r to \n
|
||
sp = p; // remember addr of insert
|
||
p = stupid_insert(p, c); // insert the char
|
||
#ifdef BB_FEATURE_VI_SETOPTS
|
||
if (showmatch && strchr(")]}", *sp) != NULL) {
|
||
showmatching(sp);
|
||
}
|
||
if (autoindent && c == '\n') { // auto indent the new line
|
||
Byte *q;
|
||
|
||
q = prev_line(p); // use prev line as templet
|
||
for (; isblnk(*q); q++) {
|
||
p = stupid_insert(p, *q); // insert the char
|
||
}
|
||
}
|
||
#endif /* BB_FEATURE_VI_SETOPTS */
|
||
}
|
||
return (p);
|
||
}
|
||
|
||
static Byte *stupid_insert(Byte * p, Byte c) // stupidly insert the char c at 'p'
|
||
{
|
||
p = text_hole_make(p, 1);
|
||
if (p != 0) {
|
||
*p = c;
|
||
file_modified = TRUE; // has the file been modified
|
||
p++;
|
||
}
|
||
return (p);
|
||
}
|
||
|
||
static Byte find_range(Byte ** start, Byte ** stop, Byte c)
|
||
{
|
||
Byte *save_dot, *p, *q;
|
||
int cnt;
|
||
|
||
save_dot = dot;
|
||
p = q = dot;
|
||
|
||
if (strchr("cdy><", c)) {
|
||
// these cmds operate on whole lines
|
||
p = q = begin_line(p);
|
||
for (cnt = 1; cnt < cmdcnt; cnt++) {
|
||
q = next_line(q);
|
||
}
|
||
q = end_line(q);
|
||
} else if (strchr("^%$0bBeEft", c)) {
|
||
// These cmds operate on char positions
|
||
do_cmd(c); // execute movement cmd
|
||
q = dot;
|
||
} else if (strchr("wW", c)) {
|
||
do_cmd(c); // execute movement cmd
|
||
if (dot > text)
|
||
dot--; // move back off of next word
|
||
if (dot > text && *dot == '\n')
|
||
dot--; // stay off NL
|
||
q = dot;
|
||
} else if (strchr("H-k{", c)) {
|
||
// these operate on multi-lines backwards
|
||
q = end_line(dot); // find NL
|
||
do_cmd(c); // execute movement cmd
|
||
dot_begin();
|
||
p = dot;
|
||
} else if (strchr("L+j}\r\n", c)) {
|
||
// these operate on multi-lines forwards
|
||
p = begin_line(dot);
|
||
do_cmd(c); // execute movement cmd
|
||
dot_end(); // find NL
|
||
q = dot;
|
||
} else {
|
||
c = 27; // error- return an ESC char
|
||
//break;
|
||
}
|
||
*start = p;
|
||
*stop = q;
|
||
if (q < p) {
|
||
*start = q;
|
||
*stop = p;
|
||
}
|
||
dot = save_dot;
|
||
return (c);
|
||
}
|
||
|
||
static int st_test(Byte * p, int type, int dir, Byte * tested)
|
||
{
|
||
Byte c, c0, ci;
|
||
int test, inc;
|
||
|
||
inc = dir;
|
||
c = c0 = p[0];
|
||
ci = p[inc];
|
||
test = 0;
|
||
|
||
if (type == S_BEFORE_WS) {
|
||
c = ci;
|
||
test = ((!isspace(c)) || c == '\n');
|
||
}
|
||
if (type == S_TO_WS) {
|
||
c = c0;
|
||
test = ((!isspace(c)) || c == '\n');
|
||
}
|
||
if (type == S_OVER_WS) {
|
||
c = c0;
|
||
test = ((isspace(c)));
|
||
}
|
||
if (type == S_END_PUNCT) {
|
||
c = ci;
|
||
test = ((ispunct(c)));
|
||
}
|
||
if (type == S_END_ALNUM) {
|
||
c = ci;
|
||
test = ((isalnum(c)) || c == '_');
|
||
}
|
||
*tested = c;
|
||
return (test);
|
||
}
|
||
|
||
static Byte *skip_thing(Byte * p, int linecnt, int dir, int type)
|
||
{
|
||
Byte c;
|
||
|
||
while (st_test(p, type, dir, &c)) {
|
||
// make sure we limit search to correct number of lines
|
||
if (c == '\n' && --linecnt < 1)
|
||
break;
|
||
if (dir >= 0 && p >= end - 1)
|
||
break;
|
||
if (dir < 0 && p <= text)
|
||
break;
|
||
p += dir; // move to next char
|
||
}
|
||
return (p);
|
||
}
|
||
|
||
// find matching char of pair () [] {}
|
||
static Byte *find_pair(Byte * p, Byte c)
|
||
{
|
||
Byte match, *q;
|
||
int dir, level;
|
||
|
||
match = ')';
|
||
level = 1;
|
||
dir = 1; // assume forward
|
||
switch (c) {
|
||
case '(':
|
||
match = ')';
|
||
break;
|
||
case '[':
|
||
match = ']';
|
||
break;
|
||
case '{':
|
||
match = '}';
|
||
break;
|
||
case ')':
|
||
match = '(';
|
||
dir = -1;
|
||
break;
|
||
case ']':
|
||
match = '[';
|
||
dir = -1;
|
||
break;
|
||
case '}':
|
||
match = '{';
|
||
dir = -1;
|
||
break;
|
||
}
|
||
for (q = p + dir; text <= q && q < end; q += dir) {
|
||
// look for match, count levels of pairs (( ))
|
||
if (*q == c)
|
||
level++; // increase pair levels
|
||
if (*q == match)
|
||
level--; // reduce pair level
|
||
if (level == 0)
|
||
break; // found matching pair
|
||
}
|
||
if (level != 0)
|
||
q = NULL; // indicate no match
|
||
return (q);
|
||
}
|
||
|
||
#ifdef BB_FEATURE_VI_SETOPTS
|
||
// show the matching char of a pair, () [] {}
|
||
static void showmatching(Byte * p)
|
||
{
|
||
Byte *q, *save_dot;
|
||
|
||
// we found half of a pair
|
||
q = find_pair(p, *p); // get loc of matching char
|
||
if (q == NULL) {
|
||
indicate_error('3'); // no matching char
|
||
} else {
|
||
// "q" now points to matching pair
|
||
save_dot = dot; // remember where we are
|
||
dot = q; // go to new loc
|
||
refresh(FALSE); // let the user see it
|
||
(void) mysleep(40); // give user some time
|
||
dot = save_dot; // go back to old loc
|
||
refresh(FALSE);
|
||
}
|
||
}
|
||
#endif /* BB_FEATURE_VI_SETOPTS */
|
||
|
||
// open a hole in text[]
|
||
static Byte *text_hole_make(Byte * p, int size) // at "p", make a 'size' byte hole
|
||
{
|
||
Byte *src, *dest;
|
||
int cnt;
|
||
|
||
if (size <= 0)
|
||
goto thm0;
|
||
src = p;
|
||
dest = p + size;
|
||
cnt = end - src; // the rest of buffer
|
||
if (memmove(dest, src, cnt) != dest) {
|
||
psbs("can't create room for new characters");
|
||
}
|
||
memset(p, ' ', size); // clear new hole
|
||
end = end + size; // adjust the new END
|
||
file_modified = TRUE; // has the file been modified
|
||
thm0:
|
||
return (p);
|
||
}
|
||
|
||
// close a hole in text[]
|
||
static Byte *text_hole_delete(Byte * p, Byte * q) // delete "p" thru "q", inclusive
|
||
{
|
||
Byte *src, *dest;
|
||
int cnt, hole_size;
|
||
|
||
// move forwards, from beginning
|
||
// assume p <= q
|
||
src = q + 1;
|
||
dest = p;
|
||
if (q < p) { // they are backward- swap them
|
||
src = p + 1;
|
||
dest = q;
|
||
}
|
||
hole_size = q - p + 1;
|
||
cnt = end - src;
|
||
if (src < text || src > end)
|
||
goto thd0;
|
||
if (dest < text || dest >= end)
|
||
goto thd0;
|
||
if (src >= end)
|
||
goto thd_atend; // just delete the end of the buffer
|
||
if (memmove(dest, src, cnt) != dest) {
|
||
psbs("can't delete the character");
|
||
}
|
||
thd_atend:
|
||
end = end - hole_size; // adjust the new END
|
||
if (dest >= end)
|
||
dest = end - 1; // make sure dest in below end-1
|
||
if (end <= text)
|
||
dest = end = text; // keep pointers valid
|
||
file_modified = TRUE; // has the file been modified
|
||
thd0:
|
||
return (dest);
|
||
}
|
||
|
||
// copy text into register, then delete text.
|
||
// if dist <= 0, do not include, or go past, a NewLine
|
||
//
|
||
static Byte *yank_delete(Byte * start, Byte * stop, int dist, int yf)
|
||
{
|
||
Byte *p;
|
||
|
||
// make sure start <= stop
|
||
if (start > stop) {
|
||
// they are backwards, reverse them
|
||
p = start;
|
||
start = stop;
|
||
stop = p;
|
||
}
|
||
if (dist <= 0) {
|
||
// we can not cross NL boundaries
|
||
p = start;
|
||
if (*p == '\n')
|
||
return (p);
|
||
// dont go past a NewLine
|
||
for (; p + 1 <= stop; p++) {
|
||
if (p[1] == '\n') {
|
||
stop = p; // "stop" just before NewLine
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
p = start;
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
text_yank(start, stop, YDreg);
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
if (yf == YANKDEL) {
|
||
p = text_hole_delete(start, stop);
|
||
} // delete lines
|
||
return (p);
|
||
}
|
||
|
||
static void show_help(void)
|
||
{
|
||
puts("These features are available:"
|
||
#ifdef BB_FEATURE_VI_SEARCH
|
||
"\n\tPattern searches with / and ?"
|
||
#endif /* BB_FEATURE_VI_SEARCH */
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
||
"\n\tLast command repeat with \'.\'"
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
"\n\tLine marking with 'x"
|
||
"\n\tNamed buffers with \"x"
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
"\n\tReadonly if vi is called as \"view\""
|
||
"\n\tReadonly with -R command line arg"
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
#ifdef BB_FEATURE_VI_SET
|
||
"\n\tSome colon mode commands with \':\'"
|
||
#endif /* BB_FEATURE_VI_SET */
|
||
#ifdef BB_FEATURE_VI_SETOPTS
|
||
"\n\tSettable options with \":set\""
|
||
#endif /* BB_FEATURE_VI_SETOPTS */
|
||
#ifdef BB_FEATURE_VI_USE_SIGNALS
|
||
"\n\tSignal catching- ^C"
|
||
"\n\tJob suspend and resume with ^Z"
|
||
#endif /* BB_FEATURE_VI_USE_SIGNALS */
|
||
#ifdef BB_FEATURE_VI_WIN_RESIZE
|
||
"\n\tAdapt to window re-sizes"
|
||
#endif /* BB_FEATURE_VI_WIN_RESIZE */
|
||
);
|
||
}
|
||
|
||
static void print_literal(Byte * buf, Byte * s) // copy s to buf, convert unprintable
|
||
{
|
||
Byte c, b[2];
|
||
|
||
b[1] = '\0';
|
||
strcpy((char *) buf, ""); // init buf
|
||
if (strlen((char *) s) <= 0)
|
||
s = (Byte *) "(NULL)";
|
||
for (; *s > '\0'; s++) {
|
||
c = *s;
|
||
if (*s > '~') {
|
||
strcat((char *) buf, SOs);
|
||
c = *s - 128;
|
||
}
|
||
if (*s < ' ') {
|
||
strcat((char *) buf, "^");
|
||
c += '@';
|
||
}
|
||
b[0] = c;
|
||
strcat((char *) buf, (char *) b);
|
||
if (*s > '~')
|
||
strcat((char *) buf, SOn);
|
||
if (*s == '\n') {
|
||
strcat((char *) buf, "$");
|
||
}
|
||
}
|
||
}
|
||
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
||
static void start_new_cmd_q(Byte c)
|
||
{
|
||
// release old cmd
|
||
if (last_modifying_cmd != 0)
|
||
free(last_modifying_cmd);
|
||
// get buffer for new cmd
|
||
last_modifying_cmd = (Byte *) malloc(BUFSIZ);
|
||
memset(last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue
|
||
// if there is a current cmd count put it in the buffer first
|
||
if (cmdcnt > 0)
|
||
sprintf((char *) last_modifying_cmd, "%d", cmdcnt);
|
||
// save char c onto queue
|
||
last_modifying_cmd[strlen((char *) last_modifying_cmd)] = c;
|
||
adding2q = 1;
|
||
return;
|
||
}
|
||
|
||
static void end_cmd_q()
|
||
{
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
YDreg = 26; // go back to default Yank/Delete reg
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
adding2q = 0;
|
||
return;
|
||
}
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
|
||
#if defined(BB_FEATURE_VI_YANKMARK) || defined(BB_FEATURE_VI_COLON) || defined(BB_FEATURE_VI_CRASHME)
|
||
static Byte *string_insert(Byte * p, Byte * s) // insert the string at 'p'
|
||
{
|
||
int cnt, i;
|
||
|
||
i = strlen((char *) s);
|
||
p = text_hole_make(p, i);
|
||
strncpy((char *) p, (char *) s, i);
|
||
for (cnt = 0; *s != '\0'; s++) {
|
||
if (*s == '\n')
|
||
cnt++;
|
||
}
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
return (p);
|
||
}
|
||
#endif /* BB_FEATURE_VI_YANKMARK || BB_FEATURE_VI_COLON || BB_FEATURE_VI_CRASHME */
|
||
|
||
#ifdef BB_FEATURE_VI_YANKMARK
|
||
static Byte *text_yank(Byte * p, Byte * q, int dest) // copy text into a register
|
||
{
|
||
Byte *t;
|
||
int cnt;
|
||
|
||
if (q < p) { // they are backwards- reverse them
|
||
t = q;
|
||
q = p;
|
||
p = t;
|
||
}
|
||
cnt = q - p + 1;
|
||
t = reg[dest];
|
||
if (t != 0) { // if already a yank register
|
||
free(t); // free it
|
||
}
|
||
t = (Byte *) malloc(cnt + 1); // get a new register
|
||
memset(t, '\0', cnt + 1); // clear new text[]
|
||
strncpy((char *) t, (char *) p, cnt); // copy text[] into bufer
|
||
reg[dest] = t;
|
||
return (p);
|
||
}
|
||
|
||
static Byte what_reg(void)
|
||
{
|
||
Byte c;
|
||
int i;
|
||
|
||
i = 0;
|
||
c = 'D'; // default to D-reg
|
||
if (0 <= YDreg && YDreg <= 25)
|
||
c = 'a' + (Byte) YDreg;
|
||
if (YDreg == 26)
|
||
c = 'D';
|
||
if (YDreg == 27)
|
||
c = 'U';
|
||
return (c);
|
||
}
|
||
|
||
static void check_context(Byte cmd)
|
||
{
|
||
// A context is defined to be "modifying text"
|
||
// Any modifying command establishes a new context.
|
||
|
||
if (dot < context_start || dot > context_end) {
|
||
if (strchr((char *) modifying_cmds, cmd) != NULL) {
|
||
// we are trying to modify text[]- make this the current context
|
||
mark[27] = mark[26]; // move cur to prev
|
||
mark[26] = dot; // move local to cur
|
||
context_start = prev_line(prev_line(dot));
|
||
context_end = next_line(next_line(dot));
|
||
//loiter= start_loiter= now;
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
|
||
static Byte *swap_context(Byte * p) // goto new context for '' command make this the current context
|
||
{
|
||
Byte *tmp;
|
||
|
||
// the current context is in mark[26]
|
||
// the previous context is in mark[27]
|
||
// only swap context if other context is valid
|
||
if (text <= mark[27] && mark[27] <= end - 1) {
|
||
tmp = mark[27];
|
||
mark[27] = mark[26];
|
||
mark[26] = tmp;
|
||
p = mark[26]; // where we are going- previous context
|
||
context_start = prev_line(prev_line(prev_line(p)));
|
||
context_end = next_line(next_line(next_line(p)));
|
||
}
|
||
return (p);
|
||
}
|
||
#endif /* BB_FEATURE_VI_YANKMARK */
|
||
|
||
static int isblnk(Byte c) // is the char a blank or tab
|
||
{
|
||
return (c == ' ' || c == '\t');
|
||
}
|
||
|
||
//----- Set terminal attributes --------------------------------
|
||
static void rawmode(void)
|
||
{
|
||
tcgetattr(0, &term_orig);
|
||
term_vi = term_orig;
|
||
term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
|
||
term_vi.c_iflag &= (~IXON & ~ICRNL);
|
||
term_vi.c_oflag &= (~ONLCR);
|
||
#ifndef linux
|
||
term_vi.c_cc[VMIN] = 1;
|
||
term_vi.c_cc[VTIME] = 0;
|
||
#endif
|
||
erase_char = term_vi.c_cc[VERASE];
|
||
tcsetattr(0, TCSANOW, &term_vi);
|
||
}
|
||
|
||
static void cookmode(void)
|
||
{
|
||
tcsetattr(0, TCSANOW, &term_orig);
|
||
}
|
||
|
||
#ifdef BB_FEATURE_VI_WIN_RESIZE
|
||
//----- See what the window size currently is --------------------
|
||
static void window_size_get(int sig)
|
||
{
|
||
int i;
|
||
|
||
i = ioctl(0, TIOCGWINSZ, &winsize);
|
||
if (i != 0) {
|
||
// force 24x80
|
||
winsize.ws_row = 24;
|
||
winsize.ws_col = 80;
|
||
}
|
||
if (winsize.ws_row <= 1) {
|
||
winsize.ws_row = 24;
|
||
}
|
||
if (winsize.ws_col <= 1) {
|
||
winsize.ws_col = 80;
|
||
}
|
||
rows = (int) winsize.ws_row;
|
||
columns = (int) winsize.ws_col;
|
||
}
|
||
#endif /* BB_FEATURE_VI_WIN_RESIZE */
|
||
|
||
//----- Come here when we get a window resize signal ---------
|
||
#ifdef BB_FEATURE_VI_USE_SIGNALS
|
||
static void winch_sig(int sig)
|
||
{
|
||
signal(SIGWINCH, winch_sig);
|
||
#ifdef BB_FEATURE_VI_WIN_RESIZE
|
||
window_size_get(0);
|
||
#endif /* BB_FEATURE_VI_WIN_RESIZE */
|
||
new_screen(rows, columns); // get memory for virtual screen
|
||
redraw(TRUE); // re-draw the screen
|
||
}
|
||
|
||
//----- Come here when we get a continue signal -------------------
|
||
static void cont_sig(int sig)
|
||
{
|
||
rawmode(); // terminal to "raw"
|
||
*status_buffer = '\0'; // clear the status buffer
|
||
redraw(TRUE); // re-draw the screen
|
||
|
||
signal(SIGTSTP, suspend_sig);
|
||
signal(SIGCONT, SIG_DFL);
|
||
kill(getpid(), SIGCONT);
|
||
}
|
||
|
||
//----- Come here when we get a Suspend signal -------------------
|
||
static void suspend_sig(int sig)
|
||
{
|
||
place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
|
||
clear_to_eol(); // Erase to end of line
|
||
cookmode(); // terminal to "cooked"
|
||
|
||
signal(SIGCONT, cont_sig);
|
||
signal(SIGTSTP, SIG_DFL);
|
||
kill(getpid(), SIGTSTP);
|
||
}
|
||
|
||
//----- Come here when we get a signal ---------------------------
|
||
static void catch_sig(int sig)
|
||
{
|
||
signal(SIGHUP, catch_sig);
|
||
signal(SIGINT, catch_sig);
|
||
signal(SIGTERM, catch_sig);
|
||
longjmp(restart, sig);
|
||
}
|
||
|
||
static void alarm_sig(int sig)
|
||
{
|
||
signal(SIGALRM, catch_sig);
|
||
longjmp(restart, sig);
|
||
}
|
||
|
||
//----- Come here when we get a core dump signal -----------------
|
||
static void core_sig(int sig)
|
||
{
|
||
signal(SIGQUIT, core_sig);
|
||
signal(SIGILL, core_sig);
|
||
signal(SIGTRAP, core_sig);
|
||
signal(SIGIOT, core_sig);
|
||
signal(SIGABRT, core_sig);
|
||
signal(SIGFPE, core_sig);
|
||
signal(SIGBUS, core_sig);
|
||
signal(SIGSEGV, core_sig);
|
||
#ifdef SIGSYS
|
||
signal(SIGSYS, core_sig);
|
||
#endif
|
||
|
||
dot = bound_dot(dot); // make sure "dot" is valid
|
||
|
||
longjmp(restart, sig);
|
||
}
|
||
#endif /* BB_FEATURE_VI_USE_SIGNALS */
|
||
|
||
static int mysleep(int hund) // sleep for 'h' 1/100 seconds
|
||
{
|
||
// Don't hang- Wait 5/100 seconds- 1 Sec= 1000000
|
||
FD_ZERO(&rfds);
|
||
FD_SET(0, &rfds);
|
||
tv.tv_sec = 0;
|
||
tv.tv_usec = hund * 10000;
|
||
select(1, &rfds, NULL, NULL, &tv);
|
||
return (FD_ISSET(0, &rfds));
|
||
}
|
||
|
||
//----- IO Routines --------------------------------------------
|
||
static Byte readit(void) // read (maybe cursor) key from stdin
|
||
{
|
||
Byte c;
|
||
int i, bufsiz, cnt, cmdindex;
|
||
struct esc_cmds {
|
||
Byte *seq;
|
||
Byte val;
|
||
};
|
||
|
||
static struct esc_cmds esccmds[] = {
|
||
{(Byte *) "OA", (Byte) VI_K_UP}, // cursor key Up
|
||
{(Byte *) "OB", (Byte) VI_K_DOWN}, // cursor key Down
|
||
{(Byte *) "OC", (Byte) VI_K_RIGHT}, // Cursor Key Right
|
||
{(Byte *) "OD", (Byte) VI_K_LEFT}, // cursor key Left
|
||
{(Byte *) "OH", (Byte) VI_K_HOME}, // Cursor Key Home
|
||
{(Byte *) "OF", (Byte) VI_K_END}, // Cursor Key End
|
||
{(Byte *) "[A", (Byte) VI_K_UP}, // cursor key Up
|
||
{(Byte *) "[B", (Byte) VI_K_DOWN}, // cursor key Down
|
||
{(Byte *) "[C", (Byte) VI_K_RIGHT}, // Cursor Key Right
|
||
{(Byte *) "[D", (Byte) VI_K_LEFT}, // cursor key Left
|
||
{(Byte *) "[H", (Byte) VI_K_HOME}, // Cursor Key Home
|
||
{(Byte *) "[F", (Byte) VI_K_END}, // Cursor Key End
|
||
{(Byte *) "[2~", (Byte) VI_K_INSERT}, // Cursor Key Insert
|
||
{(Byte *) "[5~", (Byte) VI_K_PAGEUP}, // Cursor Key Page Up
|
||
{(Byte *) "[6~", (Byte) VI_K_PAGEDOWN}, // Cursor Key Page Down
|
||
{(Byte *) "OP", (Byte) VI_K_FUN1}, // Function Key F1
|
||
{(Byte *) "OQ", (Byte) VI_K_FUN2}, // Function Key F2
|
||
{(Byte *) "OR", (Byte) VI_K_FUN3}, // Function Key F3
|
||
{(Byte *) "OS", (Byte) VI_K_FUN4}, // Function Key F4
|
||
{(Byte *) "[15~", (Byte) VI_K_FUN5}, // Function Key F5
|
||
{(Byte *) "[17~", (Byte) VI_K_FUN6}, // Function Key F6
|
||
{(Byte *) "[18~", (Byte) VI_K_FUN7}, // Function Key F7
|
||
{(Byte *) "[19~", (Byte) VI_K_FUN8}, // Function Key F8
|
||
{(Byte *) "[20~", (Byte) VI_K_FUN9}, // Function Key F9
|
||
{(Byte *) "[21~", (Byte) VI_K_FUN10}, // Function Key F10
|
||
{(Byte *) "[23~", (Byte) VI_K_FUN11}, // Function Key F11
|
||
{(Byte *) "[24~", (Byte) VI_K_FUN12}, // Function Key F12
|
||
{(Byte *) "[11~", (Byte) VI_K_FUN1}, // Function Key F1
|
||
{(Byte *) "[12~", (Byte) VI_K_FUN2}, // Function Key F2
|
||
{(Byte *) "[13~", (Byte) VI_K_FUN3}, // Function Key F3
|
||
{(Byte *) "[14~", (Byte) VI_K_FUN4}, // Function Key F4
|
||
};
|
||
|
||
#define ESCCMDS_COUNT (sizeof(esccmds)/sizeof(struct esc_cmds))
|
||
|
||
(void) alarm(0); // turn alarm OFF while we wait for input
|
||
// get input from User- are there already input chars in Q?
|
||
bufsiz = strlen((char *) readbuffer);
|
||
if (bufsiz <= 0) {
|
||
ri0:
|
||
// the Q is empty, wait for a typed char
|
||
bufsiz = read(0, readbuffer, BUFSIZ - 1);
|
||
if (bufsiz < 0) {
|
||
if (errno == EINTR)
|
||
goto ri0; // interrupted sys call
|
||
if (errno == EBADF)
|
||
editing = 0;
|
||
if (errno == EFAULT)
|
||
editing = 0;
|
||
if (errno == EINVAL)
|
||
editing = 0;
|
||
if (errno == EIO)
|
||
editing = 0;
|
||
errno = 0;
|
||
bufsiz = 0;
|
||
}
|
||
readbuffer[bufsiz] = '\0';
|
||
}
|
||
// return char if it is not part of ESC sequence
|
||
if (readbuffer[0] != 27)
|
||
goto ri1;
|
||
|
||
// This is an ESC char. Is this Esc sequence?
|
||
// Could be bare Esc key. See if there are any
|
||
// more chars to read after the ESC. This would
|
||
// be a Function or Cursor Key sequence.
|
||
FD_ZERO(&rfds);
|
||
FD_SET(0, &rfds);
|
||
tv.tv_sec = 0;
|
||
tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000
|
||
|
||
// keep reading while there are input chars and room in buffer
|
||
while (select(1, &rfds, NULL, NULL, &tv) > 0 && bufsiz <= (BUFSIZ - 5)) {
|
||
// read the rest of the ESC string
|
||
i = read(0, (void *) (readbuffer + bufsiz), BUFSIZ - bufsiz);
|
||
if (i > 0) {
|
||
bufsiz += i;
|
||
readbuffer[bufsiz] = '\0'; // Terminate the string
|
||
}
|
||
}
|
||
// Maybe cursor or function key?
|
||
for (cmdindex = 0; cmdindex < ESCCMDS_COUNT; cmdindex++) {
|
||
cnt = strlen((char *) esccmds[cmdindex].seq);
|
||
i = strncmp((char *) esccmds[cmdindex].seq, (char *) readbuffer, cnt);
|
||
if (i == 0) {
|
||
// is a Cursor key- put derived value back into Q
|
||
readbuffer[0] = esccmds[cmdindex].val;
|
||
// squeeze out the ESC sequence
|
||
for (i = 1; i < cnt; i++) {
|
||
memmove(readbuffer + 1, readbuffer + 2, BUFSIZ - 2);
|
||
readbuffer[BUFSIZ - 1] = '\0';
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
ri1:
|
||
c = readbuffer[0];
|
||
// remove one char from Q
|
||
memmove(readbuffer, readbuffer + 1, BUFSIZ - 1);
|
||
readbuffer[BUFSIZ - 1] = '\0';
|
||
(void) alarm(3); // we are done waiting for input, turn alarm ON
|
||
return (c);
|
||
}
|
||
|
||
//----- IO Routines --------------------------------------------
|
||
static Byte get_one_char()
|
||
{
|
||
static Byte c;
|
||
|
||
#ifdef BB_FEATURE_VI_DOT_CMD
|
||
// ! adding2q && ioq == 0 read()
|
||
// ! adding2q && ioq != 0 *ioq
|
||
// adding2q *last_modifying_cmd= read()
|
||
if (!adding2q) {
|
||
// we are not adding to the q.
|
||
// but, we may be reading from a q
|
||
if (ioq == 0) {
|
||
// there is no current q, read from STDIN
|
||
c = readit(); // get the users input
|
||
} else {
|
||
// there is a queue to get chars from first
|
||
c = *ioq++;
|
||
if (c == '\0') {
|
||
// the end of the q, read from STDIN
|
||
free(ioq_start);
|
||
ioq_start = ioq = 0;
|
||
c = readit(); // get the users input
|
||
}
|
||
}
|
||
} else {
|
||
// adding STDIN chars to q
|
||
c = readit(); // get the users input
|
||
if (last_modifying_cmd != 0) {
|
||
// add new char to q
|
||
last_modifying_cmd[strlen((char *) last_modifying_cmd)] = c;
|
||
}
|
||
}
|
||
#else /* BB_FEATURE_VI_DOT_CMD */
|
||
c = readit(); // get the users input
|
||
#endif /* BB_FEATURE_VI_DOT_CMD */
|
||
return (c); // return the char, where ever it came from
|
||
}
|
||
|
||
static Byte *get_input_line(Byte * prompt) // get input line- use "status line"
|
||
{
|
||
Byte buf[BUFSIZ];
|
||
Byte c;
|
||
int i;
|
||
static Byte *obufp = NULL;
|
||
|
||
strcpy((char *) buf, (char *) prompt);
|
||
*status_buffer = '\0'; // clear the status buffer
|
||
place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
|
||
clear_to_eol(); // clear the line
|
||
write(1, prompt, strlen((char *) prompt)); // write out the :, /, or ? prompt
|
||
|
||
for (i = strlen((char *) buf); i < BUFSIZ;) {
|
||
c = get_one_char(); // read user input
|
||
if (c == '\n' || c == '\r' || c == 27)
|
||
break; // is this end of input
|
||
if (c == erase_char) { // user wants to erase prev char
|
||
i--; // backup to prev char
|
||
buf[i] = '\0'; // erase the char
|
||
buf[i + 1] = '\0'; // null terminate buffer
|
||
write(1, " ", 3); // erase char on screen
|
||
if (i <= 0) { // user backs up before b-o-l, exit
|
||
break;
|
||
}
|
||
} else {
|
||
buf[i] = c; // save char in buffer
|
||
buf[i + 1] = '\0'; // make sure buffer is null terminated
|
||
write(1, buf + i, 1); // echo the char back to user
|
||
i++;
|
||
}
|
||
}
|
||
refresh(FALSE);
|
||
if (obufp != NULL)
|
||
free(obufp);
|
||
obufp = (Byte *) strdup((char *) buf);
|
||
return (obufp);
|
||
}
|
||
|
||
static int file_size(Byte * fn) // what is the byte size of "fn"
|
||
{
|
||
struct stat st_buf;
|
||
int cnt, sr;
|
||
|
||
if (fn == 0 || strlen(fn) <= 0)
|
||
return (-1);
|
||
cnt = -1;
|
||
sr = stat((char *) fn, &st_buf); // see if file exists
|
||
if (sr >= 0) {
|
||
cnt = (int) st_buf.st_size;
|
||
}
|
||
return (cnt);
|
||
}
|
||
|
||
static int file_insert(Byte * fn, Byte * p, int size)
|
||
{
|
||
int fd, cnt;
|
||
|
||
cnt = -1;
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
readonly = FALSE;
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
if (fn == 0 || strlen((char*) fn) <= 0) {
|
||
psbs("No filename given");
|
||
goto fi0;
|
||
}
|
||
if (size == 0) {
|
||
// OK- this is just a no-op
|
||
cnt = 0;
|
||
goto fi0;
|
||
}
|
||
if (size < 0) {
|
||
psbs("Trying to insert a negative number (%d) of characters", size);
|
||
goto fi0;
|
||
}
|
||
if (p < text || p > end) {
|
||
psbs("Trying to insert file outside of memory");
|
||
goto fi0;
|
||
}
|
||
|
||
// see if we can open the file
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
if (vi_readonly == TRUE) goto fi1; // do not try write-mode
|
||
#endif
|
||
fd = open((char *) fn, O_RDWR); // assume read & write
|
||
if (fd < 0) {
|
||
// could not open for writing- maybe file is read only
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
fi1:
|
||
#endif
|
||
fd = open((char *) fn, O_RDONLY); // try read-only
|
||
if (fd < 0) {
|
||
psbs("\"%s\" %s", fn, "could not open file");
|
||
goto fi0;
|
||
}
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
// got the file- read-only
|
||
readonly = TRUE;
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
}
|
||
p = text_hole_make(p, size);
|
||
cnt = read(fd, p, size);
|
||
close(fd);
|
||
if (cnt < 0) {
|
||
cnt = -1;
|
||
p = text_hole_delete(p, p + size - 1); // un-do buffer insert
|
||
psbs("could not read file \"%s\"", fn);
|
||
} else if (cnt < size) {
|
||
// There was a partial read, shrink unused space text[]
|
||
p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
|
||
psbs("could not read all of file \"%s\"", fn);
|
||
}
|
||
if (cnt >= size)
|
||
file_modified = TRUE;
|
||
fi0:
|
||
return (cnt);
|
||
}
|
||
|
||
static int file_write(Byte * fn, Byte * first, Byte * last)
|
||
{
|
||
int fd, cnt, charcnt;
|
||
|
||
if (fn == 0) {
|
||
psbs("No current filename");
|
||
return (-1);
|
||
}
|
||
charcnt = 0;
|
||
// FIXIT- use the correct umask()
|
||
fd = open((char *) fn, (O_RDWR | O_CREAT | O_TRUNC), 0664);
|
||
if (fd < 0)
|
||
return (-1);
|
||
cnt = last - first + 1;
|
||
charcnt = write(fd, first, cnt);
|
||
if (charcnt == cnt) {
|
||
// good write
|
||
//file_modified= FALSE; // the file has not been modified
|
||
} else {
|
||
charcnt = 0;
|
||
}
|
||
close(fd);
|
||
return (charcnt);
|
||
}
|
||
|
||
//----- Terminal Drawing ---------------------------------------
|
||
// The terminal is made up of 'rows' line of 'columns' columns.
|
||
// classicly this would be 24 x 80.
|
||
// screen coordinates
|
||
// 0,0 ... 0,79
|
||
// 1,0 ... 1,79
|
||
// . ... .
|
||
// . ... .
|
||
// 22,0 ... 22,79
|
||
// 23,0 ... 23,79 status line
|
||
//
|
||
|
||
//----- Move the cursor to row x col (count from 0, not 1) -------
|
||
static void place_cursor(int row, int col, int opti)
|
||
{
|
||
char cm1[BUFSIZ];
|
||
char *cm;
|
||
int l;
|
||
#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
|
||
char cm2[BUFSIZ];
|
||
Byte *screenp;
|
||
// char cm3[BUFSIZ];
|
||
int Rrow= last_row;
|
||
#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
|
||
|
||
memset(cm1, '\0', BUFSIZ - 1); // clear the buffer
|
||
|
||
if (row < 0) row = 0;
|
||
if (row >= rows) row = rows - 1;
|
||
if (col < 0) col = 0;
|
||
if (col >= columns) col = columns - 1;
|
||
|
||
//----- 1. Try the standard terminal ESC sequence
|
||
sprintf((char *) cm1, CMrc, row + 1, col + 1);
|
||
cm= cm1;
|
||
if (opti == FALSE) goto pc0;
|
||
|
||
#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
|
||
//----- find the minimum # of chars to move cursor -------------
|
||
//----- 2. Try moving with discreet chars (Newline, [back]space, ...)
|
||
memset(cm2, '\0', BUFSIZ - 1); // clear the buffer
|
||
|
||
// move to the correct row
|
||
while (row < Rrow) {
|
||
// the cursor has to move up
|
||
strcat(cm2, CMup);
|
||
Rrow--;
|
||
}
|
||
while (row > Rrow) {
|
||
// the cursor has to move down
|
||
strcat(cm2, CMdown);
|
||
Rrow++;
|
||
}
|
||
|
||
// now move to the correct column
|
||
strcat(cm2, "\r"); // start at col 0
|
||
// just send out orignal source char to get to correct place
|
||
screenp = &screen[row * columns]; // start of screen line
|
||
strncat(cm2, screenp, col);
|
||
|
||
//----- 3. Try some other way of moving cursor
|
||
//---------------------------------------------
|
||
|
||
// pick the shortest cursor motion to send out
|
||
cm= cm1;
|
||
if (strlen(cm2) < strlen(cm)) {
|
||
cm= cm2;
|
||
} /* else if (strlen(cm3) < strlen(cm)) {
|
||
cm= cm3;
|
||
} */
|
||
#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
|
||
pc0:
|
||
l= strlen(cm);
|
||
if (l) write(1, cm, l); // move the cursor
|
||
}
|
||
|
||
//----- Erase from cursor to end of line -----------------------
|
||
static void clear_to_eol()
|
||
{
|
||
write(1, Ceol, strlen(Ceol)); // Erase from cursor to end of line
|
||
}
|
||
|
||
//----- Erase from cursor to end of screen -----------------------
|
||
static void clear_to_eos()
|
||
{
|
||
write(1, Ceos, strlen(Ceos)); // Erase from cursor to end of screen
|
||
}
|
||
|
||
//----- Start standout mode ------------------------------------
|
||
static void standout_start() // send "start reverse video" sequence
|
||
{
|
||
write(1, SOs, strlen(SOs)); // Start reverse video mode
|
||
}
|
||
|
||
//----- End standout mode --------------------------------------
|
||
static void standout_end() // send "end reverse video" sequence
|
||
{
|
||
write(1, SOn, strlen(SOn)); // End reverse video mode
|
||
}
|
||
|
||
//----- Flash the screen --------------------------------------
|
||
static void flash(int h)
|
||
{
|
||
standout_start(); // send "start reverse video" sequence
|
||
redraw(TRUE);
|
||
(void) mysleep(h);
|
||
standout_end(); // send "end reverse video" sequence
|
||
redraw(TRUE);
|
||
}
|
||
|
||
static void beep()
|
||
{
|
||
write(1, bell, strlen(bell)); // send out a bell character
|
||
}
|
||
|
||
static void indicate_error(char c)
|
||
{
|
||
#ifdef BB_FEATURE_VI_CRASHME
|
||
if (crashme > 0)
|
||
return; // generate a random command
|
||
#endif /* BB_FEATURE_VI_CRASHME */
|
||
if (err_method == 0) {
|
||
beep();
|
||
} else {
|
||
flash(10);
|
||
}
|
||
}
|
||
|
||
//----- Screen[] Routines --------------------------------------
|
||
//----- Erase the Screen[] memory ------------------------------
|
||
static void screen_erase()
|
||
{
|
||
memset(screen, ' ', screensize); // clear new screen
|
||
}
|
||
|
||
//----- Draw the status line at bottom of the screen -------------
|
||
static void show_status_line(void)
|
||
{
|
||
static int last_cksum;
|
||
int l, cnt, cksum;
|
||
|
||
cnt = strlen((char *) status_buffer);
|
||
for (cksum= l= 0; l < cnt; l++) { cksum += (int)(status_buffer[l]); }
|
||
// don't write the status line unless it changes
|
||
if (cnt > 0 && last_cksum != cksum) {
|
||
last_cksum= cksum; // remember if we have seen this line
|
||
place_cursor(rows - 1, 0, FALSE); // put cursor on status line
|
||
write(1, status_buffer, cnt);
|
||
clear_to_eol();
|
||
place_cursor(crow, ccol, FALSE); // put cursor back in correct place
|
||
}
|
||
}
|
||
|
||
//----- format the status buffer, the bottom line of screen ------
|
||
// print status buffer, with STANDOUT mode
|
||
static void psbs(char *format, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start(args, format);
|
||
strcpy((char *) status_buffer, SOs); // Terminal standout mode on
|
||
vsprintf((char *) status_buffer + strlen((char *) status_buffer), format,
|
||
args);
|
||
strcat((char *) status_buffer, SOn); // Terminal standout mode off
|
||
va_end(args);
|
||
|
||
return;
|
||
}
|
||
|
||
// print status buffer
|
||
static void psb(char *format, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start(args, format);
|
||
vsprintf((char *) status_buffer, format, args);
|
||
va_end(args);
|
||
return;
|
||
}
|
||
|
||
static void ni(Byte * s) // display messages
|
||
{
|
||
Byte buf[BUFSIZ];
|
||
|
||
print_literal(buf, s);
|
||
psbs("\'%s\' is not implemented", buf);
|
||
}
|
||
|
||
static void edit_status(void) // show file status on status line
|
||
{
|
||
int cur, tot, percent;
|
||
|
||
cur = count_lines(text, dot);
|
||
tot = count_lines(text, end - 1);
|
||
// current line percent
|
||
// ------------- ~~ ----------
|
||
// total lines 100
|
||
if (tot > 0) {
|
||
percent = (100 * cur) / tot;
|
||
} else {
|
||
cur = tot = 0;
|
||
percent = 100;
|
||
}
|
||
psb("\"%s\""
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
"%s"
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
"%s line %d of %d --%d%%--",
|
||
(cfn != 0 ? (char *) cfn : "No file"),
|
||
#ifdef BB_FEATURE_VI_READONLY
|
||
((vi_readonly == TRUE || readonly == TRUE) ? " [Read only]" : ""),
|
||
#endif /* BB_FEATURE_VI_READONLY */
|
||
(file_modified == TRUE ? " [modified]" : ""),
|
||
cur, tot, percent);
|
||
}
|
||
|
||
//----- Force refresh of all Lines -----------------------------
|
||
static void redraw(int full_screen)
|
||
{
|
||
place_cursor(0, 0, FALSE); // put cursor in correct place
|
||
clear_to_eos(); // tel terminal to erase display
|
||
screen_erase(); // erase the internal screen buffer
|
||
refresh(full_screen); // this will redraw the entire display
|
||
}
|
||
|
||
//----- Format a text[] line into a buffer ---------------------
|
||
static void format_line(Byte *dest, Byte *src, int li)
|
||
{
|
||
int co;
|
||
Byte c;
|
||
|
||
for (co= 0; co < MAX_SCR_COLS; co++) {
|
||
c= ' '; // assume blank
|
||
if (li > 0 && co == 0) {
|
||
c = '~'; // not first line, assume Tilde
|
||
}
|
||
// are there chars in text[] and have we gone past the end
|
||
if (text < end && src < end) {
|
||
c = *src++;
|
||
}
|
||
if (c == '\n')
|
||
break;
|
||
if (c < ' ' || c > '~') {
|
||
if (c == '\t') {
|
||
c = ' ';
|
||
// co % 8 != 7
|
||
for (; (co % tabstop) != (tabstop - 1); co++) {
|
||
dest[co] = c;
|
||
}
|
||
} else {
|
||
dest[co++] = '^';
|
||
c |= '@'; // make it visible
|
||
c &= 0x7f; // get rid of hi bit
|
||
}
|
||
}
|
||
// the co++ is done here so that the column will
|
||
// not be overwritten when we blank-out the rest of line
|
||
dest[co] = c;
|
||
if (src >= end)
|
||
break;
|
||
}
|
||
}
|
||
|
||
//----- Refresh the changed screen lines -----------------------
|
||
// Copy the source line from text[] into the buffer and note
|
||
// if the current screenline is different from the new buffer.
|
||
// If they differ then that line needs redrawing on the terminal.
|
||
//
|
||
static void refresh(int full_screen)
|
||
{
|
||
static int old_offset;
|
||
int li, changed;
|
||
Byte buf[MAX_SCR_COLS];
|
||
Byte *tp, *sp; // pointer into text[] and screen[]
|
||
#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
|
||
int last_li= -2; // last line that changed- for optimizing cursor movement
|
||
#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
|
||
|
||
#ifdef BB_FEATURE_VI_WIN_RESIZE
|
||
window_size_get(0);
|
||
#endif /* BB_FEATURE_VI_WIN_RESIZE */
|
||
sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
|
||
tp = screenbegin; // index into text[] of top line
|
||
|
||
// compare text[] to screen[] and mark screen[] lines that need updating
|
||
for (li = 0; li < rows - 1; li++) {
|
||
int cs, ce; // column start & end
|
||
memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
|
||
buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
|
||
// format current text line into buf
|
||
format_line(buf, tp, li);
|
||
|
||
// skip to the end of the current text[] line
|
||
while (tp < end && *tp++ != '\n') /*no-op*/ ;
|
||
|
||
// see if there are any changes between vitual screen and buf
|
||
changed = FALSE; // assume no change
|
||
cs= 0;
|
||
ce= columns-1;
|
||
sp = &screen[li * columns]; // start of screen line
|
||
if (full_screen == TRUE) {
|
||
// force re-draw of every single column from 0 - columns-1
|
||
goto re0;
|
||
}
|
||
// compare newly formatted buffer with virtual screen
|
||
// look forward for first difference between buf and screen
|
||
for ( ; cs <= ce; cs++) {
|
||
if (buf[cs + offset] != sp[cs]) {
|
||
changed = TRUE; // mark for redraw
|
||
break;
|
||
}
|
||
}
|
||
|
||
// look backward for last difference between buf and screen
|
||
for ( ; ce >= cs; ce--) {
|
||
if (buf[ce + offset] != sp[ce]) {
|
||
changed = TRUE; // mark for redraw
|
||
break;
|
||
}
|
||
}
|
||
// now, cs is index of first diff, and ce is index of last diff
|
||
|
||
// if horz offset has changed, force a redraw
|
||
if (offset != old_offset) {
|
||
re0:
|
||
changed = TRUE;
|
||
}
|
||
|
||
// make a sanity check of columns indexes
|
||
if (cs < 0) cs= 0;
|
||
if (ce > columns-1) ce= columns-1;
|
||
if (cs > ce) { cs= 0; ce= columns-1; }
|
||
// is there a change between vitual screen and buf
|
||
if (changed == TRUE) {
|
||
// copy changed part of buffer to virtual screen
|
||
memmove(sp+cs, buf+(cs+offset), ce-cs+1);
|
||
|
||
// move cursor to column of first change
|
||
if (offset != old_offset) {
|
||
// opti_cur_move is still too stupid
|
||
// to handle offsets correctly
|
||
place_cursor(li, cs, FALSE);
|
||
} else {
|
||
#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
|
||
// if this just the next line
|
||
// try to optimize cursor movement
|
||
// otherwise, use standard ESC sequence
|
||
place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
|
||
last_li= li;
|
||
#else /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
|
||
place_cursor(li, cs, FALSE); // use standard ESC sequence
|
||
#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
|
||
}
|
||
|
||
// write line out to terminal
|
||
write(1, sp+cs, ce-cs+1);
|
||
#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
|
||
last_row = li;
|
||
#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
|
||
}
|
||
}
|
||
|
||
#ifdef BB_FEATURE_VI_OPTIMIZE_CURSOR
|
||
place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
|
||
last_row = crow;
|
||
#else
|
||
place_cursor(crow, ccol, FALSE);
|
||
#endif /* BB_FEATURE_VI_OPTIMIZE_CURSOR */
|
||
|
||
if (offset != old_offset)
|
||
old_offset = offset;
|
||
}
|