ack/lang/cem/libcc.ansi/sys/stdio/vsnprintf.c
David Given 9109d7af7f First stage in modularising FILE*. Refactor so that printf/scanf don't rely on
FILE* innards; allow plats to replace the entire emulated FILE* system.
2019-06-15 13:07:10 +02:00

37 lines
572 B
C

/*
* vsprintf - print formatted output without ellipsis on an array
*/
/* $Id$ */
#include <stdio.h>
#include <stdarg.h>
#include "loc_incl.h"
#if ACKCONF_WANT_STDIO
static char* output_buffer;
static size_t output_buffer_len;
static void snprintf_putc(int c)
{
if (output_buffer_len)
{
*output_buffer++ = c;
output_buffer_len--;
}
}
int vsnprintf(char* s, size_t len, const char* format, va_list ap)
{
int retval;
output_buffer = s;
output_buffer_len = len;
retval = _doprnt(format, ap, snprintf_putc);
snprintf_putc('\0');
return retval;
}
#endif