mirror of
https://github.com/reactos/reactos.git
synced 2024-11-09 16:20:37 +00:00
127 lines
2.7 KiB
C
127 lines
2.7 KiB
C
/*
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* COPYRIGHT: GNU GPL, see COPYING in the top level directory
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* PROJECT: ReactOS crt library
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* FILE: lib/sdk/crt/printf/swprintf.c
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* PURPOSE: Implementation of swprintf
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* PROGRAMMER: Timo Kreuzer
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <limits.h>
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#include <tchar.h>
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#if IS_SECAPI
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#include <internal/safecrt.h>
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#endif
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#ifdef _UNICODE
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#define _tstreamout wstreamout
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#else
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#define _tstreamout streamout
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#endif
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#define min(a,b) (((a) < (b)) ? (a) : (b))
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int __cdecl _tstreamout(FILE *stream, const TCHAR *format, va_list argptr);
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int
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#if defined(USER32_WSPRINTF) && defined(_M_IX86)
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__stdcall
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#else
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__cdecl
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#endif
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_sxprintf(
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TCHAR *buffer,
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#if IS_SECAPI
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size_t sizeOfBuffer,
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#endif
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#if USE_COUNT
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size_t count,
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#endif
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const TCHAR *format,
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#if USE_VARARGS
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va_list argptr)
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#else
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...)
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#endif
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{
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#if !USE_COUNT
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const size_t count = INT_MAX;
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#endif
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#if !IS_SECAPI
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const size_t sizeOfBuffer = count;
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#endif
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#if !USE_VARARGS
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va_list argptr;
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#endif
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int result;
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FILE stream;
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/* Check trivial case */
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if ((buffer == NULL) && (count == 0) && (sizeOfBuffer == 0))
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{
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return 0;
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}
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#if IS_SECAPI
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/* Validate parameters */
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if (MSVCRT_CHECK_PMT(((buffer == NULL) || (format == NULL) || (sizeOfBuffer <= 0))))
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{
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errno = EINVAL;
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return -1;
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}
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/* Limit output to count + 1 characters */
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if (count != -1)
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sizeOfBuffer = min(sizeOfBuffer, count + 1);
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#endif
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/* Setup the FILE structure */
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stream._base = (char*)buffer;
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stream._ptr = stream._base;
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stream._charbuf = 0;
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stream._cnt = (int)(sizeOfBuffer * sizeof(TCHAR));
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stream._bufsiz = 0;
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stream._flag = _IOSTRG | _IOWRT;
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stream._tmpfname = 0;
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#if !USE_VARARGS
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va_start(argptr, format);
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#endif
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result = _tstreamout(&stream, format, argptr);
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#if !USE_VARARGS
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va_end(argptr);
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#endif
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#if IS_SECAPI
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/* Check for failure or unterminated string */
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if ((result < 0) || (result == sizeOfBuffer))
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{
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/* Null-terminate the buffer at the end */
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buffer[sizeOfBuffer-1] = _T('\0');
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/* Check if we can truncate */
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if (count != _TRUNCATE)
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{
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/* We can't, invoke invalid parameter handler */
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MSVCRT_INVALID_PMT("Buffer is too small");
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/* If we came back, set the buffer to an empty string */
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*buffer = 0;
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}
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/* Return failure */
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return -1;
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}
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/* Null-terminate the buffer after the string */
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buffer[result] = _T('\0');
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#else
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/* Only zero terminate if there is enough space left */
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if (stream._cnt >= sizeof(TCHAR)) *(TCHAR*)stream._ptr = _T('\0');
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#endif
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return result;
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}
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