mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 15:29:46 +00:00
04cc463452
Please refer to https://github.com/cc65/cc65/pull/532 for background info.
I wrote in https://sourceforge.net/p/cc65/mailman/message/35873183/
===
cputs() wraps to the next line if the strings is too long to fit in the current line. I don't know if it's worth the effort to allow cpeeks() to continue reading from the next line. I'd like to discuss this aspect with the actual implementers.
===
This is still as unclear today as it was when I wrote the above. Therefore this change just doesn't add cpeeks() at all.
Since f8c6c58373 the Apple II CONIO implementation doesn't "need" revers() anymore - meaning that (nearly) every possible value can be placed in VRAM with a straight cputc() (without the need for a previous revers(1)).
The implementation of cpeekc() leverages that cputc() ability by always returning the value that can be fed into cputc() without a previous revers(1). Accordingly, cpeekrevers() always returns 0.
So after the sequence revers(1); cputc(x); a cpeekc() will return a value different from x! However, I don't see this behavior braking the cpeekc() contract. I see the cpeekc() contract being defined by the sequence textcolor(cpeekcolor()); revers(cpeekrevers()); cputc(cpeekc()); placing the very same value in VRAM that there was before. And that contract is fulfilled.
223 lines
8.8 KiB
C
223 lines
8.8 KiB
C
/*****************************************************************************/
|
|
/* */
|
|
/* conio.h */
|
|
/* */
|
|
/* Direct console I/O */
|
|
/* */
|
|
/* */
|
|
/* */
|
|
/* (C) 1998-2007 Ullrich von Bassewitz */
|
|
/* Roemerstrasse 52 */
|
|
/* D-70794 Filderstadt */
|
|
/* EMail: uz@cc65.org */
|
|
/* */
|
|
/* */
|
|
/* This software is provided 'as-is', without any expressed or implied */
|
|
/* warranty. In no event will the authors be held liable for any damages */
|
|
/* arising from the use of this software. */
|
|
/* */
|
|
/* Permission is granted to anyone to use this software for any purpose, */
|
|
/* including commercial applications, and to alter it and redistribute it */
|
|
/* freely, subject to the following restrictions: */
|
|
/* */
|
|
/* 1. The origin of this software must not be misrepresented; you must not */
|
|
/* claim that you wrote the original software. If you use this software */
|
|
/* in a product, an acknowledgment in the product documentation would be */
|
|
/* appreciated but is not required. */
|
|
/* 2. Altered source versions must be plainly marked as such, and must not */
|
|
/* be misrepresented as being the original software. */
|
|
/* 3. This notice may not be removed or altered from any source */
|
|
/* distribution. */
|
|
/* */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
/*
|
|
** This is the direct console interface for cc65. I do not like the function
|
|
** names very much, but the first version started as a rewrite of Borland's
|
|
** conio, and, even if the interface has changed, the names did not.
|
|
**
|
|
** The interface does direct screen I/O, so it is fast enough for most
|
|
** programs. I did not implement text windows, since many applications do
|
|
** not need them and should not pay for the additional overhead. It should
|
|
** be easy to add text windows on a higher level if needed,
|
|
**
|
|
** Most routines do not check the parameters. This may be unfortunate but is
|
|
** also related to speed. The coordinates are always 0/0 based.
|
|
*/
|
|
|
|
|
|
|
|
#ifndef _CONIO_H
|
|
#define _CONIO_H
|
|
|
|
|
|
|
|
#include <stdarg.h>
|
|
#include <target.h>
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Functions */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
void clrscr (void);
|
|
/* Clear the whole screen and put the cursor into the top left corner */
|
|
|
|
unsigned char kbhit (void);
|
|
/* Return true if there's a key waiting, return false if not */
|
|
|
|
void __fastcall__ gotox (unsigned char x);
|
|
/* Set the cursor to the specified X position, leave the Y position untouched */
|
|
|
|
void __fastcall__ gotoy (unsigned char y);
|
|
/* Set the cursor to the specified Y position, leave the X position untouched */
|
|
|
|
void __fastcall__ gotoxy (unsigned char x, unsigned char y);
|
|
/* Set the cursor to the specified position */
|
|
|
|
unsigned char wherex (void);
|
|
/* Return the X position of the cursor */
|
|
|
|
unsigned char wherey (void);
|
|
/* Return the Y position of the cursor */
|
|
|
|
void __fastcall__ cputc (char c);
|
|
/* Output one character at the current cursor position */
|
|
|
|
void __fastcall__ cputcxy (unsigned char x, unsigned char y, char c);
|
|
/* Same as "gotoxy (x, y); cputc (c);" */
|
|
|
|
void __fastcall__ cputs (const char* s);
|
|
/* Output a NUL-terminated string at the current cursor position */
|
|
|
|
void __fastcall__ cputsxy (unsigned char x, unsigned char y, const char* s);
|
|
/* Same as "gotoxy (x, y); puts (s);" */
|
|
|
|
int cprintf (const char* format, ...);
|
|
/* Like printf(), but uses direct screen output */
|
|
|
|
int __fastcall__ vcprintf (const char* format, va_list ap);
|
|
/* Like vprintf(), but uses direct screen output */
|
|
|
|
char cgetc (void);
|
|
/* Return a character from the keyboard. If there is no character available,
|
|
** the function waits until the user does press a key. If cursor is set to
|
|
** 1 (see below), a blinking cursor is displayed while waiting.
|
|
*/
|
|
|
|
int cscanf (const char* format, ...);
|
|
/* Like scanf(), but uses direct keyboard input */
|
|
|
|
int __fastcall__ vcscanf (const char* format, va_list ap);
|
|
/* Like vscanf(), but uses direct keyboard input */
|
|
|
|
char cpeekc (void);
|
|
/* Return the character from the current cursor position */
|
|
|
|
unsigned char cpeekcolor (void);
|
|
/* Return the color from the current cursor position */
|
|
|
|
unsigned char cpeekrevers (void);
|
|
/* Return the reverse attribute from the current cursor position.
|
|
** If the character is reversed, then return 1; return 0 otherwise.
|
|
*/
|
|
|
|
void __fastcall__ cpeeks (char* s, unsigned int length);
|
|
/* Return a string of the characters that start at the current cursor position.
|
|
** Put the string into the buffer to which "s" points. The string will have
|
|
** "length" characters, then will be '\0'-terminated.
|
|
*/
|
|
|
|
unsigned char __fastcall__ cursor (unsigned char onoff);
|
|
/* If onoff is 1, a cursor is displayed when waiting for keyboard input. If
|
|
** onoff is 0, the cursor is hidden when waiting for keyboard input. The
|
|
** function returns the old cursor setting.
|
|
*/
|
|
|
|
unsigned char __fastcall__ revers (unsigned char onoff);
|
|
/* Enable/disable reverse character display. This may not be supported by
|
|
** the output device. Return the old setting.
|
|
*/
|
|
|
|
unsigned char __fastcall__ textcolor (unsigned char color);
|
|
/* Set the color for text output. The old color setting is returned. */
|
|
|
|
unsigned char __fastcall__ bgcolor (unsigned char color);
|
|
/* Set the color for the background. The old color setting is returned. */
|
|
|
|
unsigned char __fastcall__ bordercolor (unsigned char color);
|
|
/* Set the color for the border. The old color setting is returned. */
|
|
|
|
void __fastcall__ chline (unsigned char length);
|
|
/* Output a horizontal line with the given length starting at the current
|
|
** cursor position.
|
|
*/
|
|
|
|
void __fastcall__ chlinexy (unsigned char x, unsigned char y, unsigned char length);
|
|
/* Same as "gotoxy (x, y); chline (length);" */
|
|
|
|
void __fastcall__ cvline (unsigned char length);
|
|
/* Output a vertical line with the given length at the current cursor
|
|
** position.
|
|
*/
|
|
|
|
void __fastcall__ cvlinexy (unsigned char x, unsigned char y, unsigned char length);
|
|
/* Same as "gotoxy (x, y); cvline (length);" */
|
|
|
|
void __fastcall__ cclear (unsigned char length);
|
|
/* Clear part of a line (write length spaces). */
|
|
|
|
void __fastcall__ cclearxy (unsigned char x, unsigned char y, unsigned char length);
|
|
/* Same as "gotoxy (x, y); cclear (length);" */
|
|
|
|
void __fastcall__ screensize (unsigned char* x, unsigned char* y);
|
|
/* Return the current screen size. */
|
|
|
|
void __fastcall__ cputhex8 (unsigned char val);
|
|
void __fastcall__ cputhex16 (unsigned val);
|
|
/* These shouldn't be here... */
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Macros */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
/* On some platforms, functions are not available or are dummys. To suppress
|
|
** the call to these functions completely, the platform header files may
|
|
** define macros for these functions that start with an underline. If such a
|
|
** macro exists, a new macro is defined here, that expands to the one with the
|
|
** underline. The reason for this two stepped approach is that it is sometimes
|
|
** necessary to take the address of the function, which is not possible when
|
|
** using a macro. Since the function prototype is still present, #undefining
|
|
** the macro will give access to the actual function.
|
|
*/
|
|
|
|
#ifdef _textcolor
|
|
# define textcolor(color) _textcolor(color)
|
|
#endif
|
|
#ifdef _bgcolor
|
|
# define bgcolor(color) _bgcolor(color)
|
|
#endif
|
|
#ifdef _bordercolor
|
|
# define bordercolor(color) _bordercolor(color)
|
|
#endif
|
|
#ifdef _cpeekcolor
|
|
# define cpeekcolor() _cpeekcolor()
|
|
#endif
|
|
#ifdef _cpeekrevers
|
|
# define cpeekrevers() _cpeekrevers()
|
|
#endif
|
|
|
|
|
|
|
|
/* End of conio.h */
|
|
#endif
|