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 #ifdef _WIN32
31 #include <windows.h>
32 #endif
33
34 bool
u_memstream_open(struct u_memstream * mem,char ** bufp,size_t * sizep)35 u_memstream_open(struct u_memstream *mem, char **bufp, size_t *sizep)
36 {
37 #ifdef _GAMING_XBOX
38 int err = tmpfile_s(&mem->f);
39 mem->bufp = bufp;
40 mem->sizep = sizep;
41
42 return err == 0;
43 #elif defined(_WIN32)
44 bool success = false;
45
46 char path[MAX_PATH];
47 DWORD dwResult = GetTempPath(MAX_PATH, path);
48 if ((dwResult > 0) && (dwResult < MAX_PATH)) {
49 char *temp = mem->temp;
50 UINT uResult = GetTempFileName(path, "MEMSTREAM", 0, temp);
51 if (uResult != 0) {
52 FILE *f = fopen(temp, "w+b");
53 success = f != NULL;
54 if (success)
55 {
56 mem->f = f;
57 mem->bufp = bufp;
58 mem->sizep = sizep;
59 }
60 }
61 }
62
63 return success;
64 #else
65 FILE *const f = open_memstream(bufp, sizep);
66 mem->f = f;
67 return f != NULL;
68 #endif
69 }
70
71 void
u_memstream_close(struct u_memstream * mem)72 u_memstream_close(struct u_memstream *mem)
73 {
74 FILE *const f = mem->f;
75
76 #ifdef _WIN32
77 long size = ftell(f);
78 if (size > 0) {
79 /* reserve space for the null terminator */
80 char *buf = malloc(size + 1);
81 fseek(f, 0, SEEK_SET);
82 fread(buf, 1, size, f);
83 /* insert null terminator */
84 buf[size] = '\0';
85
86 *mem->bufp = buf;
87 *mem->sizep = size;
88 }
89
90 remove(mem->temp);
91 #endif
92
93 fclose(f);
94 }
95