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1 /* Copyright (c) 2009, Google Inc.
2  * All rights reserved.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions are
6  * met:
7  *
8  *     * Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  *     * Redistributions in binary form must reproduce the above
11  * copyright notice, this list of conditions and the following disclaimer
12  * in the documentation and/or other materials provided with the
13  * distribution.
14  *     * Neither the name of Google Inc. nor the names of its
15  * contributors may be used to endorse or promote products derived from
16  * this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29  *
30  * ---
31  * Author: Craig Silverstein
32  */
33 
34 #ifndef _WIN32
35 #  error You should only be including windows/port.cc in a windows environment!
36 #endif
37 
38 #include <string.h>    // for strlen(), memset(), memcmp()
39 #include <assert.h>
40 #include <stdarg.h>    // for va_list, va_start, va_end
41 #include <windows.h>
42 
43 #include "windows_port.h"
44 
45 // These call the windows _vsnprintf, but always NUL-terminate.
46 #if !defined(__MINGW32__) && !defined(__MINGW64__)  /* mingw already defines */
47 #if !(defined(_MSC_VER) && _MSC_VER >= 1900)  /* msvc 2015 already defines */
48 
49 #ifdef _MSC_VER
50 #  pragma warning(push)
51 #  pragma warning(disable: 4996) // ignore _vsnprintf security warning
52 #endif
safe_vsnprintf(char * str,size_t size,const char * format,va_list ap)53 int safe_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
54   if (size == 0)        // not even room for a \0?
55     return -1;          // not what C99 says to do, but what windows does
56   str[size-1] = '\0';
57   return _vsnprintf(str, size-1, format, ap);
58 }
59 #ifdef _MSC_VER
60 #  pragma warning(pop)
61 #endif
62 
snprintf(char * str,size_t size,const char * format,...)63 int snprintf(char *str, size_t size, const char *format, ...) {
64   int r;
65   va_list ap;
66   va_start(ap, format);
67   r = vsnprintf(str, size, format, ap);
68   va_end(ap);
69   return r;
70 }
71 
72 #endif  /* if !(defined(_MSC_VER) && _MSC_VER >= 1900)  */
73 #endif  /* #if !defined(__MINGW32__) && !defined(__MINGW64__) */
74