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1 /* libs/graphics/ports/SkOSFile_stdio.cpp | |
2 ** | |
3 ** Copyright 2006, The Android Open Source Project | |
4 ** | |
5 ** Licensed under the Apache License, Version 2.0 (the "License"); | |
6 ** you may not use this file except in compliance with the License. | |
7 ** You may obtain a copy of the License at | |
8 ** | |
9 ** http://www.apache.org/licenses/LICENSE-2.0 | |
10 ** | |
11 ** Unless required by applicable law or agreed to in writing, software | |
12 ** distributed under the License is distributed on an "AS IS" BASIS, | |
13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
14 ** See the License for the specific language governing permissions and | |
15 ** limitations under the License. | |
16 */ | |
17 | |
18 #include "SkOSFile.h" | |
19 | |
20 #ifndef SK_BUILD_FOR_BREW | |
21 | |
22 #include <stdio.h> | |
23 #include <errno.h> | |
24 | |
25 SkFILE* sk_fopen(const char path[], SkFILE_Flags flags) | |
26 { | |
27 char perm[4]; | |
28 char* p = perm; | |
29 | |
30 if (flags & kRead_SkFILE_Flag) | |
31 *p++ = 'r'; | |
32 if (flags & kWrite_SkFILE_Flag) | |
33 *p++ = 'w'; | |
34 *p++ = 'b'; | |
35 *p = 0; | |
36 | |
37 SkFILE* f = (SkFILE*)::fopen(path, perm); | |
38 #if 0 | |
39 if (NULL == f) | |
40 SkDebugf("sk_fopen failed for %s (%s), errno=%s\n", path, perm, strerror
(errno)); | |
41 #endif | |
42 return f; | |
43 } | |
44 | |
45 size_t sk_fgetsize(SkFILE* f) | |
46 { | |
47 SkASSERT(f); | |
48 | |
49 size_t curr = ::ftell((FILE*)f); // remember where we are | |
50 ::fseek((FILE*)f, 0, SEEK_END); // go to the end | |
51 size_t size = ::ftell((FILE*)f); // record the size | |
52 ::fseek((FILE*)f, (long)curr, SEEK_SET); // go back to our prev loc | |
53 return size; | |
54 } | |
55 | |
56 bool sk_frewind(SkFILE* f) | |
57 { | |
58 SkASSERT(f); | |
59 ::rewind((FILE*)f); | |
60 // ::fseek((FILE*)f, 0, SEEK_SET); | |
61 return true; | |
62 } | |
63 | |
64 size_t sk_fread(void* buffer, size_t byteCount, SkFILE* f) | |
65 { | |
66 SkASSERT(f); | |
67 if (buffer == NULL) | |
68 { | |
69 size_t curr = ::ftell((FILE*)f); | |
70 if ((long)curr == -1) { | |
71 SkDEBUGF(("sk_fread: ftell(%p) returned -1 feof:%d ferror:%d\n", f,
feof((FILE*)f), ferror((FILE*)f))); | |
72 return 0; | |
73 } | |
74 // ::fseek((FILE*)f, (long)(curr + byteCount), SEEK_SET); | |
75 int err = ::fseek((FILE*)f, (long)byteCount, SEEK_CUR); | |
76 if (err != 0) { | |
77 SkDEBUGF(("sk_fread: fseek(%d) tell:%d failed with feof:%d ferror:%d
returned:%d\n", | |
78 byteCount, curr, feof((FILE*)f), ferror((FILE*)f), err))
; | |
79 return 0; | |
80 } | |
81 return byteCount; | |
82 } | |
83 else | |
84 return ::fread(buffer, 1, byteCount, (FILE*)f); | |
85 } | |
86 | |
87 size_t sk_fwrite(const void* buffer, size_t byteCount, SkFILE* f) | |
88 { | |
89 SkASSERT(f); | |
90 return ::fwrite(buffer, 1, byteCount, (FILE*)f); | |
91 } | |
92 | |
93 void sk_fflush(SkFILE* f) | |
94 { | |
95 SkASSERT(f); | |
96 ::fflush((FILE*)f); | |
97 } | |
98 | |
99 void sk_fclose(SkFILE* f) | |
100 { | |
101 SkASSERT(f); | |
102 ::fclose((FILE*)f); | |
103 } | |
104 | |
105 #endif | |
106 | |
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