The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/ports/SkOSFile_posix.cpp
gfx/skia/trunk/src/ports/SkOSFile_posix.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:17f42f053113 |
|---|---|
| 1 /* | |
| 2 * Copyright 2013 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #include "SkOSFile.h" | |
| 9 | |
| 10 #include "SkTFitsIn.h" | |
| 11 | |
| 12 #include <stdio.h> | |
| 13 #include <sys/mman.h> | |
| 14 #include <sys/stat.h> | |
| 15 #include <sys/types.h> | |
| 16 | |
| 17 typedef struct { | |
| 18 dev_t dev; | |
| 19 ino_t ino; | |
| 20 } SkFILEID; | |
| 21 | |
| 22 static bool sk_ino(SkFILE* a, SkFILEID* id) { | |
| 23 int fd = fileno((FILE*)a); | |
| 24 if (fd < 0) { | |
| 25 return 0; | |
| 26 } | |
| 27 struct stat status; | |
| 28 if (0 != fstat(fd, &status)) { | |
| 29 return 0; | |
| 30 } | |
| 31 id->dev = status.st_dev; | |
| 32 id->ino = status.st_ino; | |
| 33 return true; | |
| 34 } | |
| 35 | |
| 36 bool sk_fidentical(SkFILE* a, SkFILE* b) { | |
| 37 SkFILEID aID, bID; | |
| 38 return sk_ino(a, &aID) && sk_ino(b, &bID) | |
| 39 && aID.ino == bID.ino | |
| 40 && aID.dev == bID.dev; | |
| 41 } | |
| 42 | |
| 43 void sk_fmunmap(const void* addr, size_t length) { | |
| 44 munmap(const_cast<void*>(addr), length); | |
| 45 } | |
| 46 | |
| 47 void* sk_fdmmap(int fd, size_t* size) { | |
| 48 struct stat status; | |
| 49 if (0 != fstat(fd, &status)) { | |
| 50 return NULL; | |
| 51 } | |
| 52 if (!S_ISREG(status.st_mode)) { | |
| 53 return NULL; | |
| 54 } | |
| 55 if (!SkTFitsIn<size_t>(status.st_size)) { | |
| 56 return NULL; | |
| 57 } | |
| 58 size_t fileSize = static_cast<size_t>(status.st_size); | |
| 59 | |
| 60 void* addr = mmap(NULL, fileSize, PROT_READ, MAP_PRIVATE, fd, 0); | |
| 61 if (MAP_FAILED == addr) { | |
| 62 return NULL; | |
| 63 } | |
| 64 | |
| 65 *size = fileSize; | |
| 66 return addr; | |
| 67 } | |
| 68 | |
| 69 int sk_fileno(SkFILE* f) { | |
| 70 return fileno((FILE*)f); | |
| 71 } | |
| 72 | |
| 73 void* sk_fmmap(SkFILE* f, size_t* size) { | |
| 74 int fd = sk_fileno(f); | |
| 75 if (fd < 0) { | |
| 76 return NULL; | |
| 77 } | |
| 78 | |
| 79 return sk_fdmmap(fd, size); | |
| 80 } |
