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3719602c PC |
1 | /* Copyright (C) 2010-2020 The RetroArch team |
2 | * | |
3 | * --------------------------------------------------------------------------------------- | |
4 | * The following license statement only applies to this file (compat_snprintf.c). | |
5 | * --------------------------------------------------------------------------------------- | |
6 | * | |
7 | * Permission is hereby granted, free of charge, | |
8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), | |
9 | * to deal in the Software without restriction, including without limitation the rights to | |
10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, | |
11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
21 | */ | |
22 | ||
23 | /* THIS FILE HAS NOT BEEN VALIDATED ON PLATFORMS BESIDES MSVC */ | |
24 | #ifdef _MSC_VER | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <stdarg.h> | |
28 | ||
29 | #if _MSC_VER < 1800 | |
30 | #define va_copy(dst, src) ((dst) = (src)) | |
31 | #endif | |
32 | ||
33 | #if _MSC_VER < 1300 | |
34 | #define _vscprintf c89_vscprintf_retro__ | |
35 | ||
36 | static int c89_vscprintf_retro__(const char *fmt, va_list pargs) | |
37 | { | |
38 | int retval; | |
39 | va_list argcopy; | |
40 | va_copy(argcopy, pargs); | |
41 | retval = vsnprintf(NULL, 0, fmt, argcopy); | |
42 | va_end(argcopy); | |
43 | return retval; | |
44 | } | |
45 | #endif | |
46 | ||
47 | /* http://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010 */ | |
48 | ||
49 | int c99_vsnprintf_retro__(char *s, size_t len, const char *fmt, va_list ap) | |
50 | { | |
51 | int count = -1; | |
52 | ||
53 | if (len != 0) | |
54 | { | |
55 | #if (_MSC_VER <= 1310) | |
56 | count = _vsnprintf(s, len - 1, fmt, ap); | |
57 | #else | |
58 | count = _vsnprintf_s(s, len, len - 1, fmt, ap); | |
59 | #endif | |
60 | } | |
61 | ||
62 | if (count == -1) | |
63 | count = _vscprintf(fmt, ap); | |
64 | ||
65 | /* there was no room for a NULL, so truncate the last character */ | |
66 | if (count == len && len) | |
67 | s[len - 1] = '\0'; | |
68 | ||
69 | return count; | |
70 | } | |
71 | ||
72 | int c99_snprintf_retro__(char *s, size_t len, const char *fmt, ...) | |
73 | { | |
74 | int count; | |
75 | va_list ap; | |
76 | ||
77 | va_start(ap, fmt); | |
78 | count = c99_vsnprintf_retro__(s, len, fmt, ap); | |
79 | va_end(ap); | |
80 | ||
81 | return count; | |
82 | } | |
83 | #endif |