| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "include/core/SkString.h" |
| #include "include/core/SkTypes.h" |
| #include "include/private/base/SkTFitsIn.h" |
| #include "include/private/base/SkTemplates.h" |
| #include "src/core/SkOSFile.h" |
| |
| #include <dirent.h> |
| #include <new> |
| #include <stdio.h> |
| #include <string.h> |
| #include <sys/mman.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #ifdef SK_BUILD_FOR_IOS |
| #include "src/ports/SkOSFile_ios.h" |
| #endif |
| |
| void sk_fsync(FILE* f) { |
| #if !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__) && !defined(_NEWLIB_VERSION) |
| int fd = fileno(f); |
| fsync(fd); |
| #endif |
| } |
| |
| bool sk_exists(const char *path, SkFILE_Flags flags) { |
| int mode = F_OK; |
| if (flags & kRead_SkFILE_Flag) { |
| mode |= R_OK; |
| } |
| if (flags & kWrite_SkFILE_Flag) { |
| mode |= W_OK; |
| } |
| #ifdef SK_BUILD_FOR_IOS |
| // if the default path fails, check the bundle (but only if read-only) |
| if (0 == access(path, mode)) { |
| return true; |
| } else { |
| return (kRead_SkFILE_Flag == flags && ios_get_path_in_bundle(path, nullptr)); |
| } |
| #else |
| return (0 == access(path, mode)); |
| #endif |
| } |
| |
| typedef struct { |
| dev_t dev; |
| ino_t ino; |
| } SkFILEID; |
| |
| static bool sk_ino(FILE* a, SkFILEID* id) { |
| int fd = fileno(a); |
| if (fd < 0) { |
| return 0; |
| } |
| struct stat status; |
| if (0 != fstat(fd, &status)) { |
| return 0; |
| } |
| id->dev = status.st_dev; |
| id->ino = status.st_ino; |
| return true; |
| } |
| |
| bool sk_fidentical(FILE* a, FILE* b) { |
| SkFILEID aID, bID; |
| return sk_ino(a, &aID) && sk_ino(b, &bID) |
| && aID.ino == bID.ino |
| && aID.dev == bID.dev; |
| } |
| |
| void sk_fmunmap(const void* addr, size_t length) { |
| munmap(const_cast<void*>(addr), length); |
| } |
| |
| void* sk_fdmmap(int fd, size_t* size) { |
| struct stat status; |
| if (0 != fstat(fd, &status)) { |
| return nullptr; |
| } |
| if (!S_ISREG(status.st_mode)) { |
| return nullptr; |
| } |
| if (!SkTFitsIn<size_t>(status.st_size)) { |
| return nullptr; |
| } |
| size_t fileSize = static_cast<size_t>(status.st_size); |
| |
| void* addr = mmap(nullptr, fileSize, PROT_READ, MAP_PRIVATE, fd, 0); |
| if (MAP_FAILED == addr) { |
| return nullptr; |
| } |
| |
| *size = fileSize; |
| return addr; |
| } |
| |
| int sk_fileno(FILE* f) { |
| return fileno(f); |
| } |
| |
| void* sk_fmmap(FILE* f, size_t* size) { |
| int fd = sk_fileno(f); |
| if (fd < 0) { |
| return nullptr; |
| } |
| |
| return sk_fdmmap(fd, size); |
| } |
| |
| size_t sk_qread(FILE* file, void* buffer, size_t count, size_t offset) { |
| int fd = sk_fileno(file); |
| if (fd < 0) { |
| return SIZE_MAX; |
| } |
| ssize_t bytesRead = pread(fd, buffer, count, offset); |
| if (bytesRead < 0) { |
| return SIZE_MAX; |
| } |
| return bytesRead; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////// |
| |
| struct SkOSFileIterData { |
| SkOSFileIterData() : fDIR(nullptr) { } |
| DIR* fDIR; |
| SkString fPath, fSuffix; |
| }; |
| static_assert(sizeof(SkOSFileIterData) <= SkOSFile::Iter::kStorageSize, "not_enough_space"); |
| |
| SkOSFile::Iter::Iter() { new (fSelf) SkOSFileIterData; } |
| |
| SkOSFile::Iter::Iter(const char path[], const char suffix[]) { |
| new (fSelf) SkOSFileIterData; |
| this->reset(path, suffix); |
| } |
| |
| SkOSFile::Iter::~Iter() { |
| SkOSFileIterData& self = *reinterpret_cast<SkOSFileIterData*>(fSelf); |
| if (self.fDIR) { |
| ::closedir(self.fDIR); |
| } |
| self.~SkOSFileIterData(); |
| } |
| |
| void SkOSFile::Iter::reset(const char path[], const char suffix[]) { |
| SkOSFileIterData& self = *reinterpret_cast<SkOSFileIterData*>(fSelf); |
| if (self.fDIR) { |
| ::closedir(self.fDIR); |
| self.fDIR = nullptr; |
| } |
| self.fPath.set(path); |
| |
| if (path) { |
| self.fDIR = ::opendir(path); |
| #ifdef SK_BUILD_FOR_IOS |
| // check bundle for directory |
| if (!self.fDIR && ios_get_path_in_bundle(path, &self.fPath)) { |
| self.fDIR = ::opendir(self.fPath.c_str()); |
| } |
| #endif |
| self.fSuffix.set(suffix); |
| } else { |
| self.fSuffix.reset(); |
| } |
| } |
| |
| // returns true if suffix is empty, or if str ends with suffix |
| static bool issuffixfor(const SkString& suffix, const char str[]) { |
| size_t suffixLen = suffix.size(); |
| size_t strLen = strlen(str); |
| |
| return strLen >= suffixLen && |
| memcmp(suffix.c_str(), str + strLen - suffixLen, suffixLen) == 0; |
| } |
| |
| bool SkOSFile::Iter::next(SkString* name, bool getDir) { |
| SkOSFileIterData& self = *reinterpret_cast<SkOSFileIterData*>(fSelf); |
| if (self.fDIR) { |
| dirent* entry; |
| |
| while ((entry = ::readdir(self.fDIR)) != nullptr) { |
| struct stat s; |
| SkString str(self.fPath); |
| |
| if (!str.endsWith("/") && !str.endsWith("\\")) { |
| str.append("/"); |
| } |
| str.append(entry->d_name); |
| |
| if (0 == stat(str.c_str(), &s)) { |
| if (getDir) { |
| if (s.st_mode & S_IFDIR) { |
| break; |
| } |
| } else { |
| if (!(s.st_mode & S_IFDIR) && issuffixfor(self.fSuffix, entry->d_name)) { |
| break; |
| } |
| } |
| } |
| } |
| if (entry) { // we broke out with a file |
| if (name) { |
| name->set(entry->d_name); |
| } |
| return true; |
| } |
| } |
| return false; |
| } |