1
2 /*
3 * Copyright 2006 The Android Open Source Project
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10 #include "SkOSFile.h"
11
12 #include <stdio.h>
13 #include <errno.h>
14
sk_fopen(const char path[],SkFILE_Flags flags)15 SkFILE* sk_fopen(const char path[], SkFILE_Flags flags)
16 {
17 char perm[4];
18 char* p = perm;
19
20 if (flags & kRead_SkFILE_Flag)
21 *p++ = 'r';
22 if (flags & kWrite_SkFILE_Flag)
23 *p++ = 'w';
24 *p++ = 'b';
25 *p = 0;
26
27 SkFILE* f = (SkFILE*)::fopen(path, perm);
28 #if 0
29 if (NULL == f)
30 SkDebugf("sk_fopen failed for %s (%s), errno=%s\n", path, perm, strerror(errno));
31 #endif
32 return f;
33 }
34
sk_fgetsize(SkFILE * f)35 size_t sk_fgetsize(SkFILE* f)
36 {
37 SkASSERT(f);
38
39 size_t curr = ::ftell((FILE*)f); // remember where we are
40 ::fseek((FILE*)f, 0, SEEK_END); // go to the end
41 size_t size = ::ftell((FILE*)f); // record the size
42 ::fseek((FILE*)f, (long)curr, SEEK_SET); // go back to our prev loc
43 return size;
44 }
45
sk_frewind(SkFILE * f)46 bool sk_frewind(SkFILE* f)
47 {
48 SkASSERT(f);
49 ::rewind((FILE*)f);
50 // ::fseek((FILE*)f, 0, SEEK_SET);
51 return true;
52 }
53
sk_fread(void * buffer,size_t byteCount,SkFILE * f)54 size_t sk_fread(void* buffer, size_t byteCount, SkFILE* f)
55 {
56 SkASSERT(f);
57 if (buffer == NULL)
58 {
59 size_t curr = ::ftell((FILE*)f);
60 if ((long)curr == -1) {
61 SkDEBUGF(("sk_fread: ftell(%p) returned -1 feof:%d ferror:%d\n", f, feof((FILE*)f), ferror((FILE*)f)));
62 return 0;
63 }
64 // ::fseek((FILE*)f, (long)(curr + byteCount), SEEK_SET);
65 int err = ::fseek((FILE*)f, (long)byteCount, SEEK_CUR);
66 if (err != 0) {
67 SkDEBUGF(("sk_fread: fseek(%d) tell:%d failed with feof:%d ferror:%d returned:%d\n",
68 byteCount, curr, feof((FILE*)f), ferror((FILE*)f), err));
69 return 0;
70 }
71 return byteCount;
72 }
73 else
74 return ::fread(buffer, 1, byteCount, (FILE*)f);
75 }
76
sk_fwrite(const void * buffer,size_t byteCount,SkFILE * f)77 size_t sk_fwrite(const void* buffer, size_t byteCount, SkFILE* f)
78 {
79 SkASSERT(f);
80 return ::fwrite(buffer, 1, byteCount, (FILE*)f);
81 }
82
sk_fflush(SkFILE * f)83 void sk_fflush(SkFILE* f)
84 {
85 SkASSERT(f);
86 ::fflush((FILE*)f);
87 }
88
sk_fclose(SkFILE * f)89 void sk_fclose(SkFILE* f)
90 {
91 SkASSERT(f);
92 ::fclose((FILE*)f);
93 }
94
95