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/*
* vsnprintf()
*
* Poor substitute for a real vsnprintf() function for systems
* that don't have them...
*/
#include "compiler.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include "nasmlib.h"
extern efunc nasm_malloc_error;
#define BUFFER_SIZE 65536 /* Bigger than any string we might print... */
static char snprintf_buffer[BUFFER_SIZE];
int vsnprintf(char *str, size_t size, const char *format, va_list ap)
{
int rv, bytes;
if (size > BUFFER_SIZE) {
nasm_malloc_error(ERR_PANIC|ERR_NOFILE,
"snprintf: size (%d) > BUFFER_SIZE (%d)",
size, BUFFER_SIZE);
size = BUFFER_SIZE;
}
rv = vsprintf(snprintf_buffer, format, ap);
if (rv >= BUFFER_SIZE) {
nasm_malloc_error(ERR_PANIC|ERR_NOFILE,
"snprintf buffer overflow");
}
if (size > 0) {
if ((size_t)rv < size-1)
bytes = rv;
else
bytes = size-1;
memcpy(str, snprintf_buffer, bytes);
str[bytes] = '\0';
}
return rv;
}
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