2005-09-15 19:26:59 +00:00
|
|
|
/* vi: set sw=4 ts=4: */
|
|
|
|
/*
|
|
|
|
* Mini less implementation for busybox
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* Copyright (C) 2005 by Rob Sullivan <cogito.ergo.cogito@gmail.com>
|
|
|
|
*
|
|
|
|
* This program is free software; you can redistribute it and/or modify
|
|
|
|
* it under the terms of the GNU General Public License as published by
|
|
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
|
|
* (at your option) any later version.
|
|
|
|
*
|
|
|
|
* This program is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
* General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU General Public License
|
|
|
|
* along with this program; if not, write to the Free Software
|
|
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
|
|
* 02111-1307 USA
|
|
|
|
*
|
2005-09-19 10:28:43 +00:00
|
|
|
* This program needs a lot of development, so consider it in a beta stage
|
|
|
|
* at best.
|
2005-09-15 19:26:59 +00:00
|
|
|
*
|
2005-09-19 10:28:43 +00:00
|
|
|
* TODO:
|
|
|
|
* - Add more regular expression support - search modifiers, certain matches, etc.
|
|
|
|
* - Add more complex bracket searching - currently, nested brackets are
|
|
|
|
* not considered.
|
|
|
|
* - Add support for "F" as an input. This causes less to act in
|
|
|
|
* a similar way to tail -f.
|
|
|
|
* - Check for binary files, and prompt the user if a binary file
|
|
|
|
* is detected.
|
|
|
|
* - Allow horizontal scrolling. Currently, lines simply continue onto
|
|
|
|
* the next line, per the terminal's discretion
|
2005-09-15 19:26:59 +00:00
|
|
|
*
|
2005-09-19 10:28:43 +00:00
|
|
|
* Notes:
|
|
|
|
* - filename is an array and not a pointer because that avoids all sorts
|
|
|
|
* of complications involving the fact that something that is pointed to
|
|
|
|
* will be changed if the pointer is changed.
|
|
|
|
* - the inp file pointer is used so that keyboard input works after
|
|
|
|
* redirected input has been read from stdin
|
2005-09-15 19:26:59 +00:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <termios.h>
|
|
|
|
#include <unistd.h>
|
|
|
|
#include <ctype.h>
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
#include "busybox.h"
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
#ifdef CONFIG_FEATURE_LESS_REGEXP
|
|
|
|
#include "xregex.h"
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
/* These are the escape sequences corresponding to special keys */
|
|
|
|
#define REAL_KEY_UP 'A'
|
|
|
|
#define REAL_KEY_DOWN 'B'
|
|
|
|
#define REAL_KEY_RIGHT 'C'
|
|
|
|
#define REAL_KEY_LEFT 'D'
|
|
|
|
#define REAL_PAGE_UP '5'
|
|
|
|
#define REAL_PAGE_DOWN '6'
|
|
|
|
|
|
|
|
/* These are the special codes assigned by this program to the special keys */
|
|
|
|
#define PAGE_UP 20
|
|
|
|
#define PAGE_DOWN 21
|
|
|
|
#define KEY_UP 22
|
|
|
|
#define KEY_DOWN 23
|
|
|
|
#define KEY_RIGHT 24
|
|
|
|
#define KEY_LEFT 25
|
|
|
|
|
|
|
|
/* The escape codes for highlighted and normal text */
|
|
|
|
#define HIGHLIGHT "\033[7m"
|
|
|
|
#define NORMAL "\033[0m"
|
|
|
|
|
|
|
|
/* The escape code to clear the screen */
|
2005-09-19 10:28:43 +00:00
|
|
|
#define CLEAR "\033[H\033[J"
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
/* Maximum number of lines in a file */
|
|
|
|
#define MAXLINES 10000
|
|
|
|
|
|
|
|
/* Get height and width of terminal */
|
2005-09-16 12:32:22 +00:00
|
|
|
#define tty_width_height() get_terminal_width_height(0, &width, &height)
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
static int height;
|
|
|
|
static int width;
|
|
|
|
static char **files;
|
|
|
|
static char filename[256];
|
2005-09-18 00:58:49 +00:00
|
|
|
static char **buffer;
|
|
|
|
static char **flines;
|
2005-09-15 19:26:59 +00:00
|
|
|
static int current_file = 1;
|
2005-09-16 12:32:22 +00:00
|
|
|
static int line_pos;
|
2005-09-15 19:26:59 +00:00
|
|
|
static int num_flines;
|
|
|
|
static int num_files = 1;
|
2005-09-16 12:32:22 +00:00
|
|
|
static int past_eof;
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
/* Command line options */
|
2005-09-18 00:58:49 +00:00
|
|
|
static unsigned long flags;
|
|
|
|
#define FLAG_E 1
|
|
|
|
#define FLAG_M (1<<1)
|
|
|
|
#define FLAG_m (1<<2)
|
|
|
|
#define FLAG_N (1<<3)
|
|
|
|
#define FLAG_TILDE (1<<4)
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
/* This is needed so that program behaviour changes when input comes from
|
|
|
|
stdin */
|
2005-09-16 12:32:22 +00:00
|
|
|
static int inp_stdin;
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_MARKS
|
|
|
|
static int mark_lines[15][2];
|
2005-09-16 12:32:22 +00:00
|
|
|
static int num_marks;
|
2005-09-15 19:26:59 +00:00
|
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_REGEXP
|
2005-09-16 12:32:22 +00:00
|
|
|
static int match_found;
|
2005-09-15 19:26:59 +00:00
|
|
|
static int match_lines[100];
|
2005-09-16 12:32:22 +00:00
|
|
|
static int match_pos;
|
|
|
|
static int num_matches;
|
|
|
|
static int match_backwards;
|
2005-09-15 19:26:59 +00:00
|
|
|
static int num_back_match = 1;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Needed termios structures */
|
|
|
|
static struct termios term_orig, term_vi;
|
|
|
|
|
|
|
|
/* File pointer to get input from */
|
|
|
|
static FILE *inp;
|
|
|
|
|
|
|
|
/* Reset terminal input to normal */
|
2005-09-16 12:32:22 +00:00
|
|
|
static void set_tty_cooked(void) {
|
|
|
|
fflush(stdout);
|
2005-09-19 14:23:46 +00:00
|
|
|
tcsetattr(fileno(inp), TCSANOW, &term_orig);
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
/* Set terminal input to raw mode (taken from vi.c) */
|
2005-09-16 12:32:22 +00:00
|
|
|
static void set_tty_raw(void) {
|
2005-09-19 14:23:46 +00:00
|
|
|
tcsetattr(fileno(inp), TCSANOW, &term_vi);
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Exit the program gracefully */
|
|
|
|
static void tless_exit(int code) {
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
/* TODO: We really should save the terminal state when we start,
|
2005-09-16 12:32:22 +00:00
|
|
|
and restore it when we exit. Less does this with the
|
2005-09-15 19:26:59 +00:00
|
|
|
"ti" and "te" termcap commands; can this be done with
|
|
|
|
only termios.h? */
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
putchar('\n');
|
|
|
|
exit(code);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Grab a character from input without requiring the return key. If the
|
|
|
|
character is ASCII \033, get more characters and assign certain sequences
|
2005-09-16 12:32:22 +00:00
|
|
|
special return codes. Note that this function works best with raw input. */
|
|
|
|
static int tless_getch(void) {
|
|
|
|
|
2005-09-19 10:28:43 +00:00
|
|
|
int input;
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
set_tty_raw();
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-19 10:28:43 +00:00
|
|
|
input = getc(inp);
|
2005-09-15 19:26:59 +00:00
|
|
|
/* Detect escape sequences (i.e. arrow keys) and handle
|
|
|
|
them accordingly */
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-19 10:28:43 +00:00
|
|
|
if (input == '\033' && getc(inp) == '[') {
|
|
|
|
input = getc(inp);
|
2005-09-15 19:26:59 +00:00
|
|
|
set_tty_cooked();
|
2005-09-19 10:28:43 +00:00
|
|
|
if (input == REAL_KEY_UP)
|
|
|
|
return KEY_UP;
|
|
|
|
else if (input == REAL_KEY_DOWN)
|
|
|
|
return KEY_DOWN;
|
|
|
|
else if (input == REAL_KEY_RIGHT)
|
|
|
|
return KEY_RIGHT;
|
|
|
|
else if (input == REAL_KEY_LEFT)
|
|
|
|
return KEY_LEFT;
|
|
|
|
else if (input == REAL_PAGE_UP)
|
|
|
|
return PAGE_UP;
|
|
|
|
else if (input == REAL_PAGE_DOWN)
|
|
|
|
return PAGE_DOWN;
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
/* The input is a normal ASCII value */
|
|
|
|
else {
|
|
|
|
set_tty_cooked();
|
2005-09-19 10:28:43 +00:00
|
|
|
return input;
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
/* Move the cursor to a position (x,y), where (0,0) is the
|
2005-09-15 19:26:59 +00:00
|
|
|
top-left corner of the console */
|
|
|
|
static void move_cursor(int x, int y) {
|
|
|
|
printf("\033[%i;%iH", x, y);
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
static void clear_line(void) {
|
2005-09-15 19:26:59 +00:00
|
|
|
move_cursor(height, 0);
|
|
|
|
printf("\033[K");
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
/* This adds line numbers to every line, as the -N flag necessitates */
|
|
|
|
static void add_linenumbers(void) {
|
|
|
|
|
|
|
|
char current_line[256];
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i <= num_flines; i++) {
|
|
|
|
safe_strncpy(current_line, flines[i], 256);
|
2005-09-29 16:18:57 +00:00
|
|
|
flines[i] = bb_xasprintf("%5d %s", i + 1, current_line);
|
2005-09-16 12:32:22 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void data_readlines(void) {
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int i;
|
|
|
|
char current_line[256];
|
|
|
|
FILE *fp;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
fp = (inp_stdin) ? stdin : bb_xfopen(filename, "rt");
|
2005-09-19 14:23:46 +00:00
|
|
|
flines = NULL;
|
|
|
|
for (i = 0; (feof(fp)==0) && (i <= MAXLINES); i++) {
|
2005-09-15 19:26:59 +00:00
|
|
|
strcpy(current_line, "");
|
|
|
|
fgets(current_line, 256, fp);
|
2005-09-19 14:23:46 +00:00
|
|
|
if(fp != stdin)
|
|
|
|
bb_xferror(fp, filename);
|
|
|
|
flines = xrealloc(flines, (i+1) * sizeof(char *));
|
2005-09-19 10:28:43 +00:00
|
|
|
flines[i] = bb_xstrdup(current_line);
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
num_flines = i - 2;
|
|
|
|
|
2005-09-19 14:23:46 +00:00
|
|
|
/* Reset variables for a new file */
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
line_pos = 0;
|
|
|
|
past_eof = 0;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
fclose(fp);
|
|
|
|
|
2005-09-19 14:23:46 +00:00
|
|
|
if(inp == NULL)
|
2005-12-15 11:53:22 +00:00
|
|
|
inp = (inp_stdin) ? bb_xfopen(CURRENT_TTY, "r") : stdin;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
if (flags & FLAG_N)
|
2005-09-15 19:26:59 +00:00
|
|
|
add_linenumbers();
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Turn a percentage into a line number */
|
2005-09-16 12:32:22 +00:00
|
|
|
static int reverse_percent(int percentage) {
|
2005-09-15 19:26:59 +00:00
|
|
|
double linenum = percentage;
|
|
|
|
linenum = ((linenum / 100) * num_flines) - 1;
|
|
|
|
return(linenum);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_FLAGS
|
2005-09-18 00:58:49 +00:00
|
|
|
|
|
|
|
/* Interestingly, writing calc_percent as a function and not a prototype saves around 32 bytes
|
|
|
|
* on my build. */
|
|
|
|
static int calc_percent(void) {
|
|
|
|
return ((100 * (line_pos + height - 2) / num_flines) + 1);
|
|
|
|
}
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
/* Print a status line if -M was specified */
|
2005-09-16 12:32:22 +00:00
|
|
|
static void m_status_print(void) {
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
int percentage;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (!past_eof) {
|
|
|
|
if (!line_pos) {
|
|
|
|
if (num_files > 1)
|
|
|
|
printf("%s%s %s%i%s%i%s%i-%i/%i ", HIGHLIGHT, filename, "(file ", current_file, " of ", num_files, ") lines ", line_pos + 1, line_pos + height - 1, num_flines + 1);
|
|
|
|
else {
|
|
|
|
printf("%s%s lines %i-%i/%i ", HIGHLIGHT, filename, line_pos + 1, line_pos + height - 1, num_flines + 1);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
printf("%s %s lines %i-%i/%i ", HIGHLIGHT, filename, line_pos + 1, line_pos + height - 1, num_flines + 1);
|
|
|
|
}
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (line_pos == num_flines - height + 2) {
|
|
|
|
printf("(END) %s", NORMAL);
|
|
|
|
if ((num_files > 1) && (current_file != num_files))
|
|
|
|
printf("%s- Next: %s%s", HIGHLIGHT, files[current_file], NORMAL);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
percentage = calc_percent();
|
2005-09-19 10:28:43 +00:00
|
|
|
printf("%i%% %s", percentage, NORMAL);
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
printf("%s%s lines %i-%i/%i (END) ", HIGHLIGHT, filename, line_pos + 1, num_flines + 1, num_flines + 1);
|
|
|
|
if ((num_files > 1) && (current_file != num_files))
|
|
|
|
printf("- Next: %s", files[current_file]);
|
|
|
|
printf("%s", NORMAL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Print a status line if -m was specified */
|
2005-09-16 12:32:22 +00:00
|
|
|
static void medium_status_print(void) {
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
int percentage;
|
|
|
|
percentage = calc_percent();
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (!line_pos)
|
2005-09-19 10:28:43 +00:00
|
|
|
printf("%s%s %i%%%s", HIGHLIGHT, filename, percentage, NORMAL);
|
2005-09-15 19:26:59 +00:00
|
|
|
else if (line_pos == num_flines - height + 2)
|
|
|
|
printf("%s(END)%s", HIGHLIGHT, NORMAL);
|
|
|
|
else
|
2005-09-19 10:28:43 +00:00
|
|
|
printf("%s%i%%%s", HIGHLIGHT, percentage, NORMAL);
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* Print the status line */
|
2005-09-16 12:32:22 +00:00
|
|
|
static void status_print(void) {
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
/* Change the status if flags have been set */
|
2005-09-16 12:32:22 +00:00
|
|
|
#ifdef CONFIG_FEATURE_LESS_FLAGS
|
2005-09-18 00:58:49 +00:00
|
|
|
if (flags & FLAG_M)
|
2005-09-15 19:26:59 +00:00
|
|
|
m_status_print();
|
2005-09-18 00:58:49 +00:00
|
|
|
else if (flags & FLAG_m)
|
2005-09-15 19:26:59 +00:00
|
|
|
medium_status_print();
|
|
|
|
/* No flags set */
|
|
|
|
else {
|
|
|
|
#endif
|
|
|
|
if (!line_pos) {
|
|
|
|
printf("%s%s %s", HIGHLIGHT, filename, NORMAL);
|
|
|
|
if (num_files > 1)
|
|
|
|
printf("%s%s%i%s%i%s%s", HIGHLIGHT, "(file ", current_file, " of ", num_files, ")", NORMAL);
|
|
|
|
}
|
|
|
|
else if (line_pos == num_flines - height + 2) {
|
|
|
|
printf("%s%s %s", HIGHLIGHT, "(END)", NORMAL);
|
|
|
|
if ((num_files > 1) && (current_file != num_files))
|
|
|
|
printf("%s%s%s%s", HIGHLIGHT, "- Next: ", files[current_file], NORMAL);
|
|
|
|
}
|
|
|
|
else {
|
2005-09-22 14:19:34 +00:00
|
|
|
putchar(':');
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_FLAGS
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Print the buffer */
|
2005-09-16 12:32:22 +00:00
|
|
|
static void buffer_print(void) {
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int i;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-19 10:28:43 +00:00
|
|
|
printf("%s", CLEAR);
|
2005-09-15 19:26:59 +00:00
|
|
|
if (num_flines >= height - 2) {
|
|
|
|
for (i = 0; i < height - 1; i++)
|
|
|
|
printf("%s", buffer[i]);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
for (i = 1; i < (height - 1 - num_flines); i++)
|
|
|
|
putchar('\n');
|
|
|
|
for (i = 0; i < height - 1; i++)
|
|
|
|
printf("%s", buffer[i]);
|
|
|
|
}
|
2005-09-18 00:58:49 +00:00
|
|
|
|
|
|
|
status_print();
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Initialise the buffer */
|
2005-09-16 12:32:22 +00:00
|
|
|
static void buffer_init(void) {
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int i;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-19 10:28:43 +00:00
|
|
|
if(buffer == NULL) {
|
|
|
|
/* malloc the number of lines needed for the buffer */
|
|
|
|
buffer = xrealloc(buffer, height * sizeof(char *));
|
|
|
|
} else {
|
|
|
|
for (i = 0; i < (height - 1); i++)
|
|
|
|
free(buffer[i]);
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
/* Fill the buffer until the end of the file or the
|
2005-09-15 19:26:59 +00:00
|
|
|
end of the buffer is reached */
|
|
|
|
for (i = 0; (i < (height - 1)) && (i <= num_flines); i++) {
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup(flines[i]);
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
/* If the buffer still isn't full, fill it with blank lines */
|
|
|
|
for (; i < (height - 1); i++) {
|
2005-09-19 10:28:43 +00:00
|
|
|
buffer[i] = bb_xstrdup("");
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Move the buffer up and down in the file in order to scroll */
|
|
|
|
static void buffer_down(int nlines) {
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int i;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (!past_eof) {
|
|
|
|
if (line_pos + (height - 3) + nlines < num_flines) {
|
|
|
|
line_pos += nlines;
|
2005-09-19 10:28:43 +00:00
|
|
|
for (i = 0; i < (height - 1); i++) {
|
|
|
|
free(buffer[i]);
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup(flines[line_pos + i]);
|
2005-09-19 10:28:43 +00:00
|
|
|
}
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* As the number of lines requested was too large, we just move
|
2005-09-16 12:32:22 +00:00
|
|
|
to the end of the file */
|
|
|
|
while (line_pos + (height - 3) + 1 < num_flines) {
|
2005-09-15 19:26:59 +00:00
|
|
|
line_pos += 1;
|
2005-09-19 10:28:43 +00:00
|
|
|
for (i = 0; i < (height - 1); i++) {
|
|
|
|
free(buffer[i]);
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup(flines[line_pos + i]);
|
2005-09-19 10:28:43 +00:00
|
|
|
}
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We exit if the -E flag has been set */
|
2005-09-18 00:58:49 +00:00
|
|
|
if ((flags & FLAG_E) && (line_pos + (height - 2) == num_flines))
|
2005-09-15 19:26:59 +00:00
|
|
|
tless_exit(0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void buffer_up(int nlines) {
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int i;
|
|
|
|
int tilde_line;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (!past_eof) {
|
|
|
|
if (line_pos - nlines >= 0) {
|
|
|
|
line_pos -= nlines;
|
2005-09-19 10:28:43 +00:00
|
|
|
for (i = 0; i < (height - 1); i++) {
|
|
|
|
free(buffer[i]);
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup(flines[line_pos + i]);
|
2005-09-19 10:28:43 +00:00
|
|
|
}
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* As the requested number of lines to move was too large, we
|
|
|
|
move one line up at a time until we can't. */
|
|
|
|
while (line_pos != 0) {
|
|
|
|
line_pos -= 1;
|
2005-09-19 10:28:43 +00:00
|
|
|
for (i = 0; i < (height - 1); i++) {
|
|
|
|
free(buffer[i]);
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup(flines[line_pos + i]);
|
2005-09-19 10:28:43 +00:00
|
|
|
}
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* Work out where the tildes start */
|
|
|
|
tilde_line = num_flines - line_pos + 3;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
line_pos -= nlines;
|
|
|
|
/* Going backwards nlines lines has taken us to a point where
|
|
|
|
nothing is past the EOF, so we revert to normal. */
|
|
|
|
if (line_pos < num_flines - height + 3) {
|
|
|
|
past_eof = 0;
|
|
|
|
buffer_up(nlines);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
/* We only move part of the buffer, as the rest
|
2005-09-16 12:32:22 +00:00
|
|
|
is past the EOF */
|
2005-09-15 19:26:59 +00:00
|
|
|
for (i = 0; i < (height - 1); i++) {
|
2005-09-19 10:28:43 +00:00
|
|
|
free(buffer[i]);
|
2005-09-15 19:26:59 +00:00
|
|
|
if (i < tilde_line - nlines + 1)
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup(flines[line_pos + i]);
|
2005-09-15 19:26:59 +00:00
|
|
|
else {
|
|
|
|
if (line_pos >= num_flines - height + 2)
|
2005-09-19 10:28:43 +00:00
|
|
|
buffer[i] = bb_xstrdup("~\n");
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
}
|
2005-09-16 12:32:22 +00:00
|
|
|
}
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void buffer_line(int linenum) {
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int i;
|
|
|
|
|
|
|
|
past_eof = 0;
|
|
|
|
|
|
|
|
if (linenum < 1 || linenum > num_flines) {
|
|
|
|
clear_line();
|
|
|
|
printf("%s%s%i%s", HIGHLIGHT, "Cannot seek to line number ", linenum, NORMAL);
|
|
|
|
}
|
|
|
|
else if (linenum < (num_flines - height - 2)) {
|
2005-09-19 10:28:43 +00:00
|
|
|
for (i = 0; i < (height - 1); i++) {
|
|
|
|
free(buffer[i]);
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup(flines[linenum + i]);
|
2005-09-19 10:28:43 +00:00
|
|
|
}
|
2005-09-15 19:26:59 +00:00
|
|
|
line_pos = linenum;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
for (i = 0; i < (height - 1); i++) {
|
2005-09-19 10:28:43 +00:00
|
|
|
free(buffer[i]);
|
2005-09-15 19:26:59 +00:00
|
|
|
if (linenum + i < num_flines + 2)
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup(flines[linenum + i]);
|
2005-09-15 19:26:59 +00:00
|
|
|
else
|
2005-09-22 14:19:34 +00:00
|
|
|
buffer[i] = bb_xstrdup((flags & FLAG_TILDE) ? "\n" : "~\n");
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
line_pos = linenum;
|
|
|
|
/* Set past_eof so buffer_down and buffer_up act differently */
|
|
|
|
past_eof = 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
/* Reinitialise everything for a new file - free the memory and start over */
|
|
|
|
static void reinitialise(void) {
|
|
|
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
for (i = 0; i <= num_flines; i++)
|
|
|
|
free(flines[i]);
|
|
|
|
free(flines);
|
2005-09-19 10:28:43 +00:00
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
data_readlines();
|
|
|
|
buffer_init();
|
|
|
|
buffer_print();
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
static void examine_file(void) {
|
|
|
|
|
|
|
|
int newline_offset;
|
|
|
|
|
|
|
|
clear_line();
|
|
|
|
printf("Examine: ");
|
|
|
|
fgets(filename, 256, inp);
|
|
|
|
|
|
|
|
/* As fgets adds a newline to the end of an input string, we
|
|
|
|
need to remove it */
|
|
|
|
newline_offset = strlen(filename) - 1;
|
|
|
|
filename[newline_offset] = '\0';
|
|
|
|
|
2005-09-22 14:19:34 +00:00
|
|
|
files[num_files] = bb_xstrdup(filename);
|
2005-09-16 12:32:22 +00:00
|
|
|
current_file = num_files + 1;
|
|
|
|
num_files++;
|
|
|
|
|
|
|
|
inp_stdin = 0;
|
2005-09-18 00:58:49 +00:00
|
|
|
reinitialise();
|
2005-09-16 12:32:22 +00:00
|
|
|
}
|
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
/* This function changes the file currently being paged. direction can be one of the following:
|
|
|
|
* -1: go back one file
|
|
|
|
* 0: go to the first file
|
|
|
|
* 1: go forward one file
|
|
|
|
*/
|
|
|
|
static void change_file (int direction) {
|
|
|
|
if (current_file != ((direction > 0) ? num_files : 1)) {
|
|
|
|
current_file = direction ? current_file + direction : 1;
|
2005-09-16 12:32:22 +00:00
|
|
|
strcpy(filename, files[current_file - 1]);
|
2005-09-18 00:58:49 +00:00
|
|
|
reinitialise();
|
2005-09-16 12:32:22 +00:00
|
|
|
}
|
|
|
|
else {
|
|
|
|
clear_line();
|
2005-09-18 00:58:49 +00:00
|
|
|
printf("%s%s%s", HIGHLIGHT, (direction > 0) ? "No next file" : "No previous file", NORMAL);
|
2005-09-16 12:32:22 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void remove_current_file(void) {
|
|
|
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (current_file != 1) {
|
2005-09-18 00:58:49 +00:00
|
|
|
change_file(-1);
|
2005-09-16 12:32:22 +00:00
|
|
|
for (i = 3; i <= num_files; i++)
|
|
|
|
files[i - 2] = files[i - 1];
|
|
|
|
num_files--;
|
|
|
|
buffer_print();
|
|
|
|
}
|
|
|
|
else {
|
2005-09-18 00:58:49 +00:00
|
|
|
change_file(1);
|
2005-09-16 12:32:22 +00:00
|
|
|
for (i = 2; i <= num_files; i++)
|
|
|
|
files[i - 2] = files[i - 1];
|
|
|
|
num_files--;
|
|
|
|
current_file--;
|
|
|
|
buffer_print();
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
static void colon_process(void) {
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int keypress;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
/* Clear the current line and print a prompt */
|
|
|
|
clear_line();
|
|
|
|
printf(" :");
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
keypress = tless_getch();
|
|
|
|
switch (keypress) {
|
|
|
|
case 'd':
|
|
|
|
remove_current_file();
|
|
|
|
break;
|
|
|
|
case 'e':
|
|
|
|
examine_file();
|
|
|
|
break;
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_FLAGS
|
|
|
|
case 'f':
|
|
|
|
clear_line();
|
|
|
|
m_status_print();
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
case 'n':
|
2005-09-18 00:58:49 +00:00
|
|
|
change_file(1);
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case 'p':
|
2005-09-18 00:58:49 +00:00
|
|
|
change_file(-1);
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case 'q':
|
|
|
|
tless_exit(0);
|
|
|
|
break;
|
|
|
|
case 'x':
|
2005-09-18 00:58:49 +00:00
|
|
|
change_file(0);
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
#ifdef CONFIG_FEATURE_LESS_REGEXP
|
|
|
|
/* The below two regular expression handler functions NEED development. */
|
|
|
|
|
|
|
|
/* Get a regular expression from the user, and then go through the current
|
|
|
|
file line by line, running a processing regex function on each one. */
|
|
|
|
|
|
|
|
static char *insert_highlights (char *line, int start, int end) {
|
|
|
|
|
2005-09-29 16:18:57 +00:00
|
|
|
return bb_xasprintf("%.*s%s%.*s%s%s", start, line, HIGHLIGHT,
|
2005-09-19 10:28:43 +00:00
|
|
|
end - start, line + start, NORMAL, line + end);
|
2005-09-16 12:32:22 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static char *process_regex_on_line(char *line, regex_t *pattern) {
|
|
|
|
/* This function takes the regex and applies it to the line.
|
|
|
|
Each part of the line that matches has the HIGHLIGHT
|
|
|
|
and NORMAL escape sequences placed around it by
|
|
|
|
insert_highlights, and then the line is returned. */
|
|
|
|
|
|
|
|
int match_status;
|
|
|
|
char *line2 = (char *) malloc((sizeof(char) * (strlen(line) + 1)) + 64);
|
|
|
|
char sub_line[256];
|
|
|
|
int prev_eo = 0;
|
2005-09-16 13:16:01 +00:00
|
|
|
regmatch_t match_structs;
|
2005-09-19 10:28:43 +00:00
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
memset(sub_line, 0, 256);
|
|
|
|
strcpy(line2, line);
|
|
|
|
|
|
|
|
match_found = 0;
|
|
|
|
match_status = regexec(pattern, line2, 1, &match_structs, 0);
|
|
|
|
|
|
|
|
while (match_status == 0) {
|
|
|
|
|
|
|
|
memset(sub_line, 0, 256);
|
|
|
|
|
|
|
|
if (match_found == 0)
|
|
|
|
match_found = 1;
|
|
|
|
|
|
|
|
line2 = insert_highlights(line2, match_structs.rm_so + prev_eo, match_structs.rm_eo + prev_eo);
|
|
|
|
if (match_structs.rm_eo + 11 + prev_eo < strlen(line2))
|
|
|
|
strcat(sub_line, line2 + match_structs.rm_eo + 11 + prev_eo);
|
|
|
|
|
|
|
|
prev_eo += match_structs.rm_eo + 11;
|
|
|
|
match_status = regexec(pattern, sub_line, 1, &match_structs, REG_NOTBOL);
|
|
|
|
}
|
|
|
|
|
|
|
|
return line2;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void regex_process(void) {
|
|
|
|
|
|
|
|
char uncomp_regex[100];
|
|
|
|
char current_line[256];
|
|
|
|
int i;
|
|
|
|
int j = 0;
|
|
|
|
regex_t *pattern;
|
|
|
|
|
|
|
|
/* Reset variables */
|
|
|
|
match_lines[0] = -1;
|
|
|
|
match_pos = 0;
|
|
|
|
num_matches = 0;
|
|
|
|
match_found = 0;
|
|
|
|
|
|
|
|
pattern = (regex_t *) malloc(sizeof(regex_t));
|
|
|
|
memset(pattern, 0, sizeof(regex_t));
|
|
|
|
|
|
|
|
/* Get the uncompiled regular expression from the user */
|
|
|
|
clear_line();
|
2005-09-18 00:58:49 +00:00
|
|
|
putchar((match_backwards) ? '?' : '/');
|
2005-09-22 14:19:34 +00:00
|
|
|
uncomp_regex[0] = 0;
|
|
|
|
fgets(uncomp_regex, sizeof(uncomp_regex), stdin);
|
|
|
|
i = strlen(uncomp_regex);
|
|
|
|
if(i > 0) {
|
|
|
|
if(uncomp_regex[i-1] == '\n')
|
|
|
|
uncomp_regex[i-1] = '\0';
|
|
|
|
else
|
|
|
|
while((i = getchar()) != '\n' && i != EOF);
|
|
|
|
}
|
2005-09-16 12:32:22 +00:00
|
|
|
|
|
|
|
/* Compile the regex and check for errors */
|
|
|
|
xregcomp(pattern, uncomp_regex, 0);
|
|
|
|
|
|
|
|
/* Run the regex on each line of the current file here */
|
|
|
|
for (i = 0; i <= num_flines; i++) {
|
|
|
|
strcpy(current_line, process_regex_on_line(flines[i], pattern));
|
2005-09-22 14:19:34 +00:00
|
|
|
flines[i] = bb_xstrdup(current_line);
|
2005-09-16 12:32:22 +00:00
|
|
|
if (match_found) {
|
|
|
|
match_lines[j] = i;
|
|
|
|
j++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
num_matches = j;
|
|
|
|
if ((match_lines[0] != -1) && (num_flines > height - 2))
|
|
|
|
buffer_line(match_lines[0]);
|
|
|
|
else
|
|
|
|
buffer_init();
|
|
|
|
}
|
|
|
|
|
|
|
|
static void goto_match(int match) {
|
|
|
|
|
|
|
|
/* This goes to a specific match - all line positions of matches are
|
|
|
|
stored within the match_lines[] array. */
|
|
|
|
if ((match < num_matches) && (match >= 0)) {
|
|
|
|
buffer_line(match_lines[match]);
|
|
|
|
match_pos = match;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void search_backwards(void) {
|
|
|
|
|
|
|
|
int current_linepos = line_pos;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
match_backwards = 1;
|
|
|
|
regex_process();
|
|
|
|
|
|
|
|
for (i = 0; i < num_matches; i++) {
|
|
|
|
if (match_lines[i] > current_linepos) {
|
|
|
|
buffer_line(match_lines[i - num_back_match]);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Reset variables */
|
|
|
|
match_backwards = 0;
|
|
|
|
num_back_match = 1;
|
|
|
|
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static void number_process(int first_digit) {
|
|
|
|
|
|
|
|
int i = 1;
|
|
|
|
int num;
|
|
|
|
char num_input[80];
|
|
|
|
char keypress;
|
2005-09-19 14:23:46 +00:00
|
|
|
char *endptr;
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
num_input[0] = first_digit;
|
|
|
|
|
|
|
|
/* Clear the current line, print a prompt, and then print the digit */
|
2005-09-15 19:26:59 +00:00
|
|
|
clear_line();
|
|
|
|
printf(":%c", first_digit);
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-19 14:23:46 +00:00
|
|
|
/* Receive input until a letter is given (max 80 chars)*/
|
|
|
|
while((i < 80) && (num_input[i] = tless_getch()) && isdigit(num_input[i])) {
|
2005-09-22 14:19:34 +00:00
|
|
|
putchar(num_input[i]);
|
2005-09-15 19:26:59 +00:00
|
|
|
i++;
|
|
|
|
}
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
/* Take the final letter out of the digits string */
|
|
|
|
keypress = num_input[i];
|
|
|
|
num_input[i] = '\0';
|
2005-09-19 14:23:46 +00:00
|
|
|
num = strtol(num_input, &endptr, 10);
|
|
|
|
if (endptr==num_input || *endptr!='\0' || num < 1 || num > MAXLINES)
|
|
|
|
goto END;
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
/* We now know the number and the letter entered, so we process them */
|
|
|
|
switch (keypress) {
|
|
|
|
case KEY_DOWN: case 'z': case 'd': case 'e': case ' ': case '\015':
|
|
|
|
buffer_down(num);
|
|
|
|
break;
|
|
|
|
case KEY_UP: case 'b': case 'w': case 'y': case 'u':
|
|
|
|
buffer_up(num);
|
|
|
|
break;
|
|
|
|
case 'g': case '<': case 'G': case '>':
|
|
|
|
if (num_flines >= height - 2)
|
|
|
|
buffer_line(num - 1);
|
|
|
|
break;
|
|
|
|
case 'p': case '%':
|
|
|
|
buffer_line(reverse_percent(num));
|
|
|
|
break;
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_REGEXP
|
|
|
|
case 'n':
|
|
|
|
goto_match(match_pos + num - 1);
|
|
|
|
break;
|
|
|
|
case '/':
|
|
|
|
regex_process();
|
|
|
|
goto_match(num - 1);
|
|
|
|
break;
|
|
|
|
case '?':
|
|
|
|
num_back_match = num;
|
|
|
|
search_backwards();
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
2005-09-19 14:23:46 +00:00
|
|
|
END:
|
2005-09-18 00:58:49 +00:00
|
|
|
buffer_print();
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_FLAGCS
|
2005-09-16 12:32:22 +00:00
|
|
|
static void flag_change(void) {
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int keypress;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
clear_line();
|
2005-09-18 00:58:49 +00:00
|
|
|
putchar('-');
|
2005-09-15 19:26:59 +00:00
|
|
|
keypress = tless_getch();
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
switch (keypress) {
|
|
|
|
case 'M':
|
2005-09-22 14:19:34 +00:00
|
|
|
flags ^= FLAG_M;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case 'm':
|
2005-09-22 14:19:34 +00:00
|
|
|
flags ^= FLAG_m;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case 'E':
|
2005-09-22 14:19:34 +00:00
|
|
|
flags ^= FLAG_E;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case '~':
|
2005-09-22 14:19:34 +00:00
|
|
|
flags ^= FLAG_TILDE;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
static void show_flag_status(void) {
|
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int keypress;
|
|
|
|
int flag_val;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
clear_line();
|
2005-09-18 00:58:49 +00:00
|
|
|
putchar('_');
|
2005-09-15 19:26:59 +00:00
|
|
|
keypress = tless_getch();
|
|
|
|
|
|
|
|
switch (keypress) {
|
|
|
|
case 'M':
|
2005-09-18 00:58:49 +00:00
|
|
|
flag_val = flags & FLAG_M;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case 'm':
|
2005-09-18 00:58:49 +00:00
|
|
|
flag_val = flags & FLAG_m;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case '~':
|
2005-09-18 00:58:49 +00:00
|
|
|
flag_val = flags & FLAG_TILDE;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case 'N':
|
2005-09-18 00:58:49 +00:00
|
|
|
flag_val = flags & FLAG_N;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
case 'E':
|
2005-09-18 00:58:49 +00:00
|
|
|
flag_val = flags & FLAG_E;
|
2005-09-15 19:26:59 +00:00
|
|
|
break;
|
|
|
|
default:
|
|
|
|
flag_val = 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
clear_line();
|
2005-09-19 10:28:43 +00:00
|
|
|
printf("%s%s%i%s", HIGHLIGHT, "The status of the flag is: ", flag_val != 0, NORMAL);
|
2005-09-15 19:26:59 +00:00
|
|
|
}
|
2005-09-16 12:32:22 +00:00
|
|
|
#endif
|
2005-09-15 19:26:59 +00:00
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
static void full_repaint(void) {
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
int temp_line_pos = line_pos;
|
|
|
|
data_readlines();
|
|
|
|
buffer_init();
|
|
|
|
buffer_line(temp_line_pos);
|
|
|
|
buffer_print();
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
static void save_input_to_file(void) {
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
char current_line[256];
|
|
|
|
int i;
|
|
|
|
FILE *fp;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
clear_line();
|
|
|
|
printf("Log file: ");
|
|
|
|
fgets(current_line, 256, inp);
|
|
|
|
current_line[strlen(current_line) - 1] = '\0';
|
|
|
|
if (strlen(current_line)) {
|
|
|
|
fp = bb_xfopen(current_line, "w");
|
|
|
|
for (i = 0; i < num_flines; i++)
|
|
|
|
fprintf(fp, "%s", flines[i]);
|
|
|
|
fclose(fp);
|
|
|
|
buffer_print();
|
|
|
|
}
|
|
|
|
else
|
|
|
|
printf("%sNo log file%s", HIGHLIGHT, NORMAL);
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_MARKS
|
2005-09-16 12:32:22 +00:00
|
|
|
static void add_mark(void) {
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
int letter;
|
|
|
|
int mark_line;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
clear_line();
|
|
|
|
printf("Mark: ");
|
|
|
|
letter = tless_getch();
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (isalpha(letter)) {
|
|
|
|
mark_line = line_pos;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
/* If we exceed 15 marks, start overwriting previous ones */
|
|
|
|
if (num_marks == 14)
|
|
|
|
num_marks = 0;
|
|
|
|
|
|
|
|
mark_lines[num_marks][0] = letter;
|
|
|
|
mark_lines[num_marks][1] = line_pos;
|
|
|
|
num_marks++;
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
clear_line();
|
|
|
|
printf("%s%s%s", HIGHLIGHT, "Invalid mark letter", NORMAL);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
static void goto_mark(void) {
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
int letter;
|
|
|
|
int i;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
clear_line();
|
|
|
|
printf("Go to mark: ");
|
|
|
|
letter = tless_getch();
|
2005-09-18 00:58:49 +00:00
|
|
|
clear_line();
|
2005-09-19 10:28:43 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (isalpha(letter)) {
|
|
|
|
for (i = 0; i <= num_marks; i++)
|
|
|
|
if (letter == mark_lines[i][0]) {
|
|
|
|
buffer_line(mark_lines[i][1]);
|
|
|
|
break;
|
|
|
|
}
|
2005-09-18 00:58:49 +00:00
|
|
|
if ((num_marks == 14) && (letter != mark_lines[14][0]))
|
2005-09-15 19:26:59 +00:00
|
|
|
printf("%s%s%s", HIGHLIGHT, "Mark not set", NORMAL);
|
|
|
|
}
|
2005-09-18 00:58:49 +00:00
|
|
|
else
|
2005-09-15 19:26:59 +00:00
|
|
|
printf("%s%s%s", HIGHLIGHT, "Invalid mark letter", NORMAL);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_BRACKETS
|
|
|
|
|
|
|
|
static char opp_bracket (char bracket) {
|
|
|
|
|
|
|
|
switch (bracket) {
|
|
|
|
case '{': case '[':
|
|
|
|
return bracket + 2;
|
|
|
|
break;
|
|
|
|
case '(':
|
|
|
|
return ')';
|
|
|
|
break;
|
|
|
|
case '}': case ']':
|
|
|
|
return bracket - 2;
|
|
|
|
break;
|
|
|
|
case ')':
|
|
|
|
return '(';
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
return 0;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void match_right_bracket(char bracket) {
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int bracket_line = -1;
|
|
|
|
int i;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
clear_line();
|
2005-09-19 10:28:43 +00:00
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
if (strchr(flines[line_pos], bracket) == NULL)
|
2005-09-15 19:26:59 +00:00
|
|
|
printf("%s%s%s", HIGHLIGHT, "No bracket in top line", NORMAL);
|
|
|
|
else {
|
|
|
|
for (i = line_pos + 1; i < num_flines; i++) {
|
|
|
|
if (strchr(flines[i], opp_bracket(bracket)) != NULL) {
|
|
|
|
bracket_line = i;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
if (bracket_line == -1)
|
2005-09-15 19:26:59 +00:00
|
|
|
printf("%s%s%s", HIGHLIGHT, "No matching bracket found", NORMAL);
|
|
|
|
|
|
|
|
buffer_line(bracket_line - height + 2);
|
|
|
|
buffer_print();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void match_left_bracket (char bracket) {
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int bracket_line = -1;
|
|
|
|
int i;
|
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
clear_line();
|
2005-09-19 10:28:43 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (strchr(flines[line_pos + height - 2], bracket) == NULL) {
|
|
|
|
printf("%s%s%s", HIGHLIGHT, "No bracket in bottom line", NORMAL);
|
|
|
|
printf("%s", flines[line_pos + height]);
|
|
|
|
sleep(4);
|
|
|
|
}
|
|
|
|
else {
|
|
|
|
for (i = line_pos + height - 2; i >= 0; i--) {
|
|
|
|
if (strchr(flines[i], opp_bracket(bracket)) != NULL) {
|
|
|
|
bracket_line = i;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
if (bracket_line == -1)
|
2005-09-15 19:26:59 +00:00
|
|
|
printf("%s%s%s", HIGHLIGHT, "No matching bracket found", NORMAL);
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
buffer_line(bracket_line);
|
|
|
|
buffer_print();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
#endif /* CONFIG_FEATURE_LESS_BRACKETS */
|
|
|
|
|
|
|
|
static void keypress_process(int keypress) {
|
|
|
|
switch (keypress) {
|
|
|
|
case KEY_DOWN: case 'e': case 'j': case '\015':
|
|
|
|
buffer_down(1);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case KEY_UP: case 'y': case 'k':
|
|
|
|
buffer_up(1);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case PAGE_DOWN: case ' ': case 'z':
|
|
|
|
buffer_down(height - 1);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case PAGE_UP: case 'w': case 'b':
|
|
|
|
buffer_up(height - 1);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case 'd':
|
|
|
|
buffer_down((height - 1) / 2);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case 'u':
|
|
|
|
buffer_up((height - 1) / 2);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case 'g': case 'p': case '<': case '%':
|
|
|
|
buffer_up(num_flines + 1);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case 'G': case '>':
|
|
|
|
buffer_down(num_flines + 1);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case 'q': case 'Q':
|
|
|
|
tless_exit(0);
|
|
|
|
break;
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_MARKS
|
|
|
|
case 'm':
|
|
|
|
add_mark();
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case '\'':
|
|
|
|
goto_mark();
|
|
|
|
buffer_print();
|
|
|
|
break;
|
2005-09-15 19:26:59 +00:00
|
|
|
#endif
|
2005-09-16 12:32:22 +00:00
|
|
|
case 'r':
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case 'R':
|
|
|
|
full_repaint();
|
|
|
|
break;
|
|
|
|
case 's':
|
|
|
|
if (inp_stdin)
|
|
|
|
save_input_to_file();
|
|
|
|
break;
|
|
|
|
case 'E':
|
|
|
|
examine_file();
|
|
|
|
break;
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_FLAGS
|
|
|
|
case '=':
|
|
|
|
clear_line();
|
|
|
|
m_status_print();
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_REGEXP
|
|
|
|
case '/':
|
|
|
|
regex_process();
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case 'n':
|
|
|
|
goto_match(match_pos + 1);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case 'N':
|
|
|
|
goto_match(match_pos - 1);
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case '?':
|
|
|
|
search_backwards();
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_FLAGCS
|
|
|
|
case '-':
|
|
|
|
flag_change();
|
|
|
|
buffer_print();
|
|
|
|
break;
|
|
|
|
case '_':
|
|
|
|
show_flag_status();
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
#ifdef CONFIG_FEATURE_LESS_BRACKETS
|
|
|
|
case '{': case '(': case '[':
|
|
|
|
match_right_bracket(keypress);
|
|
|
|
break;
|
|
|
|
case '}': case ')': case ']':
|
|
|
|
match_left_bracket(keypress);
|
|
|
|
break;
|
|
|
|
#endif
|
|
|
|
case ':':
|
|
|
|
colon_process();
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
2005-09-18 00:58:49 +00:00
|
|
|
|
2005-09-16 12:32:22 +00:00
|
|
|
if (isdigit(keypress))
|
|
|
|
number_process(keypress);
|
|
|
|
}
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
int less_main(int argc, char **argv) {
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
int keypress;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-18 00:58:49 +00:00
|
|
|
flags = bb_getopt_ulflags(argc, argv, "EMmN~");
|
2005-09-15 19:26:59 +00:00
|
|
|
|
|
|
|
argc -= optind;
|
|
|
|
argv += optind;
|
|
|
|
files = argv;
|
|
|
|
num_files = argc;
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
if (!num_files) {
|
|
|
|
if (ttyname(STDIN_FILENO) == NULL)
|
|
|
|
inp_stdin = 1;
|
|
|
|
else {
|
|
|
|
bb_error_msg("Missing filename");
|
|
|
|
bb_show_usage();
|
|
|
|
}
|
|
|
|
}
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-19 14:23:46 +00:00
|
|
|
strcpy(filename, (inp_stdin) ? bb_msg_standard_input : files[0]);
|
2005-09-15 19:26:59 +00:00
|
|
|
tty_width_height();
|
2005-09-19 14:23:46 +00:00
|
|
|
data_readlines();
|
|
|
|
tcgetattr(fileno(inp), &term_orig);
|
2005-09-19 10:28:43 +00:00
|
|
|
term_vi = term_orig;
|
|
|
|
term_vi.c_lflag &= (~ICANON & ~ECHO);
|
|
|
|
term_vi.c_iflag &= (~IXON & ~ICRNL);
|
|
|
|
term_vi.c_oflag &= (~ONLCR);
|
|
|
|
term_vi.c_cc[VMIN] = 1;
|
|
|
|
term_vi.c_cc[VTIME] = 0;
|
2005-09-15 19:26:59 +00:00
|
|
|
buffer_init();
|
|
|
|
buffer_print();
|
2005-09-16 12:32:22 +00:00
|
|
|
|
2005-09-15 19:26:59 +00:00
|
|
|
while (1) {
|
|
|
|
keypress = tless_getch();
|
|
|
|
keypress_process(keypress);
|
|
|
|
}
|
|
|
|
}
|