147 lines
4.2 KiB
C
147 lines
4.2 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#define _SNPRINTF_DLLIMPORT __declspec( dllexport )
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#include <stdarg.h>
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#include <stdio.h>
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#ifdef __MINGW32__
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/* MinGW-w64 doesn't have a _tcsinc() inline or library function */
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#define _MB_MAP_DIRECT
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#endif
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#include <tchar.h>
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#include <systools/win32/snprintf.h>
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#ifdef _MSC_VER
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#pragma warning(disable:4273) // inconsistent dll linkage
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#endif
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#if defined(__MINGW32_VERSION) && ((__MINGW32_MAJOR_VERSION < 3)||((__MINGW32_MAJOR_VERSION == 3)&&(__MINGW32_MINOR_VERSION < 18)))
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/* The non-debug versions of _vscprintf/_scprintf are just calls
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to _vsprintf/_sprintf with string buffer pointer set to NULL,
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requires MSVCRT version 7.0 */
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#ifdef __MINGW32__
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static int __cdecl _vsctprintf( const TCHAR *format, va_list ap )
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#else
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static int __cdecl _vsctprintf( const _TXCHAR *format, va_list ap )
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#endif
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{
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FILE *fp = _tfopen( _T("NUL"), _T("wb") );
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if ( fp )
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{
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int retval = _vftprintf( fp, format, ap );
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fclose( fp );
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return retval;
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}
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return -1;
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}
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#endif
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#if !defined(__MINGW32__) || defined (__NO_ISOCEXT)
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/* This function retrieves the pointer to the last character of a buffer.
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That is the pointer to the last character of the buffer that fits
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completely into that buffer or the position of the terminating zero.
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buffer Pointer to a _TXCHAR buffer to be examined
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count size of the buffer to be examined
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return The pointer to the last character that fits into the buffer or
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NULL if count is zero or count is one and the first byte was a
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leading DBCS character
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*/
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static _TCHAR *GetLastBufferChar( _TCHAR *buffer, size_t count )
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{
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_TCHAR *last = NULL;
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_TCHAR *cur = buffer;
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while ( (size_t)(cur - buffer) < count )
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{
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last = cur;
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if ( !*last )
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break;
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cur = _tcsinc(last);
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}
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return last;
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}
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/* Implementation of snprintf following the ISO/IEC 9899:1999 (ISO C99) standard */
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_SNPRINTF_DLLIMPORT int __cdecl vsntprintf( _TCHAR *buffer, size_t count, const _TCHAR *format, va_list list )
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{
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int retval;
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/* First of all call the existing non POSIX standard function assuming
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the buffer size will be large enough */
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retval = _vsntprintf( buffer, count, format, list );
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if ( retval < 0 )
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{
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/* If the buffer wasn't large enough ensure that the buffer will be
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zero terminated */
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_TCHAR *last = GetLastBufferChar( buffer, count );
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if (last )
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*last = 0;
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/* Retrieve the count of characters that would have been written
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if the buffer were large enough */
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retval = _vsctprintf( format, list );
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}
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else if ( (size_t)retval == count && count )
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{
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/* If the buffer was large enough but not large enough for the trailing
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zero make the buffer zero terminated */
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_TCHAR *last = GetLastBufferChar( buffer, count );
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if (last )
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*last = 0;
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}
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return retval;
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}
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/* Implementation of snprintf following the ISO/IEC 9899:1999 (ISO C99) standard */
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_SNPRINTF_DLLIMPORT int __cdecl sntprintf( _TCHAR *buffer, size_t count, const _TCHAR *format, ... )
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{
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va_list list;
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int retval;
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va_start( list, format );
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retval = vsntprintf( buffer, count, format, list );
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va_end( list );
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return retval;
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}
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#endif
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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