1 /*
2 * Copyright 2020 Lag Free Games, LLC
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial portions
15 * of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
20 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
21 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25
26 #include "memstream.h"
27
28 #include <stdlib.h>
29
30 bool
u_memstream_open(struct u_memstream * mem,char ** bufp,size_t * sizep)31 u_memstream_open(struct u_memstream *mem, char **bufp, size_t *sizep)
32 {
33 #if defined(_WIN32)
34 bool success = false;
35
36 char path[MAX_PATH];
37 DWORD dwResult = GetTempPath(MAX_PATH, path);
38 if ((dwResult > 0) && (dwResult < MAX_PATH)) {
39 char *temp = mem->temp;
40 UINT uResult = GetTempFileName(path, "MEMSTREAM", 0, temp);
41 if (uResult != 0) {
42 FILE *f = fopen(temp, "w+b");
43 success = f != NULL;
44 if (success)
45 {
46 mem->f = f;
47 mem->bufp = bufp;
48 mem->sizep = sizep;
49 }
50 }
51 }
52
53 return success;
54 #elif defined(__APPLE__)
55 return false;
56 #else
57 FILE *const f = open_memstream(bufp, sizep);
58 mem->f = f;
59 return f != NULL;
60 #endif
61 }
62
63 void
u_memstream_close(struct u_memstream * mem)64 u_memstream_close(struct u_memstream *mem)
65 {
66 FILE *const f = mem->f;
67
68 #ifdef _WIN32
69 long size = ftell(f);
70 if (size > 0) {
71 char *buf = malloc(size);
72 fseek(f, 0, SEEK_SET);
73 fread(buf, 1, size, f);
74
75 *mem->bufp = buf;
76 *mem->sizep = size;
77 }
78
79 remove(mem->temp);
80 #endif
81
82 fclose(f);
83 }
84