1 /* 2 * Copyright 2006 The Android Open Source Project 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 #include "SkTypes.h" 10 11 #include <errno.h> 12 #include <stdio.h> 13 #include <sys/stat.h> 14 15 #ifdef SK_BUILD_FOR_UNIX 16 #include <unistd.h> 17 #endif 18 19 #ifdef _WIN32 20 #include <direct.h> 21 #include <io.h> 22 #include <vector> 23 #include "SkUTF.h" 24 #endif 25 26 #ifdef SK_BUILD_FOR_IOS 27 #include "SkOSFile_ios.h" 28 #endif 29 30 #ifdef _WIN32 31 static bool is_ascii(const char* s) { 32 while (char v = *s++) { 33 if ((v & 0x80) != 0) { 34 return false; 35 } 36 } 37 return true; 38 } 39 40 static FILE* fopen_win(const char* utf8path, const char* perm) { 41 if (is_ascii(utf8path)) { 42 return fopen(utf8path, perm); 43 } 44 45 const char* ptr = utf8path; 46 const char* end = utf8path + strlen(utf8path); 47 size_t n = 0; 48 while (ptr < end) { 49 SkUnichar u = SkUTF::NextUTF8(&ptr, end); 50 if (u < 0) { 51 return nullptr; // malformed UTF-8 52 } 53 n += SkUTF::ToUTF16(u); 54 } 55 std::vector<uint16_t> wchars(n + 1); 56 uint16_t* out = wchars.data(); 57 for (const char* ptr = utf8path; ptr < end;) { 58 out += SkUTF::ToUTF16(SkUTF::NextUTF8(&ptr, end), out); 59 } 60 SkASSERT(out == &wchars[n]); 61 *out = 0; // final null 62 wchar_t wperms[4] = {(wchar_t)perm[0], (wchar_t)perm[1], (wchar_t)perm[2], (wchar_t)perm[3]}; 63 return _wfopen((wchar_t*)wchars.data(), wperms); 64 } 65 #endif 66 67 FILE* sk_fopen(const char path[], SkFILE_Flags flags) { 68 char perm[4] = {0, 0, 0, 0}; 69 char* p = perm; 70 71 if (flags & kRead_SkFILE_Flag) { 72 *p++ = 'r'; 73 } 74 if (flags & kWrite_SkFILE_Flag) { 75 *p++ = 'w'; 76 } 77 *p = 'b'; 78 79 FILE* file = nullptr; 80 #ifdef _WIN32 81 file = fopen_win(path, perm); 82 #else 83 file = fopen(path, perm); 84 #endif 85 #ifdef SK_BUILD_FOR_IOS 86 // if not found in default path and read-only, try to open from bundle 87 if (!file && kRead_SkFILE_Flag == flags) { 88 SkString bundlePath; 89 if (ios_get_path_in_bundle(path, &bundlePath)) { 90 file = fopen(bundlePath.c_str(), perm); 91 } 92 } 93 #endif 94 95 if (nullptr == file && (flags & kWrite_SkFILE_Flag)) { 96 SkDEBUGF("sk_fopen: fopen(\"%s\", \"%s\") returned nullptr (errno:%d): %s\n", 97 path, perm, errno, strerror(errno)); 98 } 99 return file; 100 } 101 102 size_t sk_fgetsize(FILE* f) { 103 SkASSERT(f); 104 105 long curr = ftell(f); // remember where we are 106 if (curr < 0) { 107 return 0; 108 } 109 110 fseek(f, 0, SEEK_END); // go to the end 111 long size = ftell(f); // record the size 112 if (size < 0) { 113 size = 0; 114 } 115 116 fseek(f, curr, SEEK_SET); // go back to our prev location 117 return size; 118 } 119 120 size_t sk_fwrite(const void* buffer, size_t byteCount, FILE* f) { 121 SkASSERT(f); 122 return fwrite(buffer, 1, byteCount, f); 123 } 124 125 void sk_fflush(FILE* f) { 126 SkASSERT(f); 127 fflush(f); 128 } 129 130 void sk_fsync(FILE* f) { 131 #if !defined(_WIN32) && !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__) \ 132 && !defined(_NEWLIB_VERSION) 133 int fd = fileno(f); 134 fsync(fd); 135 #endif 136 } 137 138 size_t sk_ftell(FILE* f) { 139 long curr = ftell(f); 140 if (curr < 0) { 141 return 0; 142 } 143 return curr; 144 } 145 146 void sk_fclose(FILE* f) { 147 if (f) { 148 fclose(f); 149 } 150 } 151 152 bool sk_isdir(const char *path) { 153 struct stat status; 154 if (0 != stat(path, &status)) { 155 #ifdef SK_BUILD_FOR_IOS 156 // check the bundle directory if not in default path 157 SkString bundlePath; 158 if (ios_get_path_in_bundle(path, &bundlePath)) { 159 if (0 != stat(bundlePath.c_str(), &status)) { 160 return false; 161 } 162 } 163 #else 164 return false; 165 #endif 166 } 167 return SkToBool(status.st_mode & S_IFDIR); 168 } 169 170 bool sk_mkdir(const char* path) { 171 if (sk_isdir(path)) { 172 return true; 173 } 174 if (sk_exists(path)) { 175 fprintf(stderr, 176 "sk_mkdir: path '%s' already exists but is not a directory\n", 177 path); 178 return false; 179 } 180 181 int retval; 182 #ifdef _WIN32 183 retval = _mkdir(path); 184 #else 185 retval = mkdir(path, 0777); 186 #endif 187 return 0 == retval; 188 } 189