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#include <stdio.h> 21#include <errno.h> 22 23SkFILE* sk_fopen(const char path[], SkFILE_Flags flags) 24{ 25 char perm[4]; 26 char* p = perm; 27 28 if (flags & kRead_SkFILE_Flag) 29 *p++ = 'r'; 30 if (flags & kWrite_SkFILE_Flag) 31 *p++ = 'w'; 32 *p++ = 'b'; 33 *p = 0; 34 35 SkFILE* f = (SkFILE*)::fopen(path, perm); 36#if 0 37 if (NULL == f) 38 SkDebugf("sk_fopen failed for %s (%s), errno=%s\n", path, perm, strerror(errno)); 39#endif 40 return f; 41} 42 43size_t sk_fgetsize(SkFILE* f) 44{ 45 SkASSERT(f); 46 47 size_t curr = ::ftell((FILE*)f); // remember where we are 48 ::fseek((FILE*)f, 0, SEEK_END); // go to the end 49 size_t size = ::ftell((FILE*)f); // record the size 50 ::fseek((FILE*)f, (long)curr, SEEK_SET); // go back to our prev loc 51 return size; 52} 53 54bool sk_frewind(SkFILE* f) 55{ 56 SkASSERT(f); 57 ::rewind((FILE*)f); 58// ::fseek((FILE*)f, 0, SEEK_SET); 59 return true; 60} 61 62size_t sk_fread(void* buffer, size_t byteCount, SkFILE* f) 63{ 64 SkASSERT(f); 65 if (buffer == NULL) 66 { 67 size_t curr = ::ftell((FILE*)f); 68 if ((long)curr == -1) { 69 SkDEBUGF(("sk_fread: ftell(%p) returned -1 feof:%d ferror:%d\n", f, feof((FILE*)f), ferror((FILE*)f))); 70 return 0; 71 } 72 // ::fseek((FILE*)f, (long)(curr + byteCount), SEEK_SET); 73 int err = ::fseek((FILE*)f, (long)byteCount, SEEK_CUR); 74 if (err != 0) { 75 SkDEBUGF(("sk_fread: fseek(%d) tell:%d failed with feof:%d ferror:%d returned:%d\n", 76 byteCount, curr, feof((FILE*)f), ferror((FILE*)f), err)); 77 return 0; 78 } 79 return byteCount; 80 } 81 else 82 return ::fread(buffer, 1, byteCount, (FILE*)f); 83} 84 85size_t sk_fwrite(const void* buffer, size_t byteCount, SkFILE* f) 86{ 87 SkASSERT(f); 88 return ::fwrite(buffer, 1, byteCount, (FILE*)f); 89} 90 91void sk_fflush(SkFILE* f) 92{ 93 SkASSERT(f); 94 ::fflush((FILE*)f); 95} 96 97void sk_fclose(SkFILE* f) 98{ 99 SkASSERT(f); 100 ::fclose((FILE*)f); 101} 102 103