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/* vsnprintf( char *, size_t, const char *, va_list )
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
#include <stdio.h>
#include <stdarg.h>
#ifndef REGTEST
int vsnprintf( char * _PDCLIB_restrict s, size_t n, const char * _PDCLIB_restrict format, _PDCLIB_va_list arg )
{
/* TODO: This function should interpret format as multibyte characters. */
struct _PDCLIB_status_t status;
status.base = 0;
status.flags = 0;
status.n = n;
status.i = 0;
status.current = 0;
status.s = s;
status.width = 0;
status.prec = EOF;
status.stream = NULL;
va_copy( status.arg, arg );
while ( *format != '\0' )
{
const char * rc;
if ( ( *format != '%' ) || ( ( rc = _PDCLIB_print( format, &status ) ) == format ) )
{
/* No conversion specifier, print verbatim */
if ( status.i < n )
{
s[ status.i ] = *format;
}
status.i++;
format++;
}
else
{
/* Continue parsing after conversion specifier */
format = rc;
}
}
if ( status.i < n )
{
s[ status.i ] = '\0';
}
va_end( status.arg );
return status.i;
}
#endif
#ifdef TEST
#define _PDCLIB_FILEID "stdio/vsnprintf.c"
#define _PDCLIB_STRINGIO
#include <stdint.h>
#include <stddef.h>
#include "_PDCLIB_test.h"
static int testprintf( char * s, const char * format, ... )
{
int i;
va_list arg;
va_start( arg, format );
i = vsnprintf( s, 100, format, arg );
va_end( arg );
return i;
}
int main( void )
{
char target[100];
#include "printf_testcases.h"
return TEST_RESULTS;
}
#endif
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