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vt100-games/Robots/mescc/printf.h

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2020-03-10 16:16:14 +01:00
/**
* @file printf.h
* @brief Library for printf() function.
* @author Miguel I. Garcia Lopez / FloppySoftware
*
* Implementation of printf() function, for MESCC (Mike's Enhanced
* Small C Compiler for Z80 & CP/M).
*
* Revisions:
* - 20 Oct 2000 : Last revision.
* - 16 Apr 2007 : GPL'd.
* - 25 Aug 2016 : Documented. GPL v3.
*
* Copyright (c) 1999-2016 Miguel I. Garcia Lopez / FloppySoftware.
*
* Licensed under the GNU General Public License v3.
*
* http://www.floppysoftware.es
* floppysoftware@gmail.com
*/
#ifndef PRINTF_H
#define PRINTF_H
// Dependencies
// ------------
#ifndef XPRINTF_H
#include <xprintf.h>
#endif
#ifndef CONIO_H
#include <conio.h>
#endif
/**
* @fn int printf(char *fmt, arg1, arg2, ...)
* @brief Formatted output to stdout (or console).
*
* See the documentation for xprintf.h to learn about the string format.
*
* @param fmt - string format
* @param arg1 - argument #1
* @param arg? - argument #?
* @return number or characters written, or -1 on failure (currently always #).
*/
#asm
printf:
ADD HL,HL
ADD HL,SP
INC HL
INC HL ;HL=Adr. fmt
LD DE,xpfout
PUSH DE
LD DE,xpfend
PUSH DE
PUSH HL
CALL xprintf
POP BC
POP BC
POP BC
RET
#endasm
// int xpfout(char ch) : output ch to stdout; return 0 on success, !=0 on failure (currently always returns 0).
#asm
xpfout:
PUSH HL
CALL putchar
POP BC
LD HL,0
RET
#endasm
// void xpfend(void) : end formatted output; currently does nothing.
#asm
xpfend:
RET
#endasm
#endif