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