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kolibrios/programs/develop/open watcom/trunk/clib/string/vsprintf.c
Sergey Semyonov (Serge) 275695e8c3 update clib
git-svn-id: svn://kolibrios.org@701 a494cfbc-eb01-0410-851d-a64ba20cac60
2008-01-23 19:23:33 +00:00

128 lines
3.7 KiB
C

/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
* DESCRIBE IT HERE!
*
****************************************************************************/
#include "variety.h"
#include "widechar.h"
#include <stdio.h>
#include <stdarg.h>
#include <limits.h>
#include "printf.h"
/*
* mem_putc -- append a character to a string in memory
*/
#ifdef __WIDECHAR__
struct vswprtf_buf {
CHAR_TYPE *bufptr;
int chars_output;
int max_chars;
};
static slib_callback_t mem_putc; // setup calling convention
static void __SLIB_CALLBACK mem_putc( SPECS __SLIB *specs, int op_char )
{
struct vswprtf_buf *info;
info = (struct vswprtf_buf*) specs->_dest;
if( info->chars_output + 1 <= info->max_chars ) {
*( info->bufptr++ ) = op_char;
specs->_output_count++;
info->chars_output++;
}
}
#else
static slib_callback_t mem_putc; // setup calling convention
static void __SLIB_CALLBACK mem_putc( SPECS __SLIB *specs, int op_char )
{
*( specs->_dest++ ) = op_char;
specs->_output_count++;
}
#endif
#ifdef __WIDECHAR__
_WCRTLINK int vswprintf( CHAR_TYPE *dest, size_t n, const CHAR_TYPE *format, va_list arg )
{
slib_callback_t *tmp;
auto struct vswprtf_buf info;
#if defined( __386__ ) && defined( __QNX__ )
/* avoid some segment relocations for 32-bit QNX */
tmp = (void (*)())mem_putc;
#else
tmp = mem_putc;
#endif
if( n != 0 ) {
info.bufptr = dest;
info.chars_output = 0;
info.max_chars = n - 1;
__wprtf( &info, format, arg, tmp );
dest[info.chars_output] = NULLCHAR;
}
return( info.chars_output );
}
#endif
_WCRTLINK int __F_NAME(vsprintf,_vswprintf) ( CHAR_TYPE *dest, const CHAR_TYPE *format, va_list arg )
{
slib_callback_t *tmp;
#ifndef __WIDECHAR__
register int len;
#else
auto struct vswprtf_buf info;
#endif
#if defined( __386__ ) && defined( __QNX__ )
/* avoid some segment relocations for 32-bit QNX */
tmp = (void (*)())mem_putc;
#else
tmp = mem_putc;
#endif
#ifdef __WIDECHAR__
info.bufptr = dest;
info.chars_output = 0;
info.max_chars = INT_MAX;
__wprtf( &info, format, arg, tmp );
dest[info.chars_output] = NULLCHAR;
return( info.chars_output );
#else
len = __prtf( dest, format, arg, tmp );
dest[len] = NULLCHAR;
return( len );
#endif
}