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 "include/core/SkTypes.h"
9 #include "src/core/SkOSFile.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 "src/utils/SkUTF.h"
24 #endif
25
26 #ifdef SK_BUILD_FOR_IOS
27 #include "src/ports/SkOSFile_ios.h"
28 #endif
29
30 #ifdef _WIN32
is_ascii(const char * s)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
fopen_win(const char * utf8path,const char * perm)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 ptr = utf8path;
58 while (ptr < end) {
59 out += SkUTF::ToUTF16(SkUTF::NextUTF8(&ptr, end), out);
60 }
61 SkASSERT(out == &wchars[n]);
62 *out = 0; // final null
63 wchar_t wperms[4] = {(wchar_t)perm[0], (wchar_t)perm[1], (wchar_t)perm[2], (wchar_t)perm[3]};
64 return _wfopen((wchar_t*)wchars.data(), wperms);
65 }
66 #endif
67
sk_fopen(const char path[],SkFILE_Flags flags)68 FILE* sk_fopen(const char path[], SkFILE_Flags flags) {
69 char perm[4] = {0, 0, 0, 0};
70 char* p = perm;
71
72 if (flags & kRead_SkFILE_Flag) {
73 *p++ = 'r';
74 }
75 if (flags & kWrite_SkFILE_Flag) {
76 *p++ = 'w';
77 }
78 *p = 'b';
79
80 FILE* file = nullptr;
81 #ifdef _WIN32
82 file = fopen_win(path, perm);
83 #else
84 file = fopen(path, perm);
85 #endif
86 #ifdef SK_BUILD_FOR_IOS
87 // if not found in default path and read-only, try to open from bundle
88 if (!file && kRead_SkFILE_Flag == flags) {
89 SkString bundlePath;
90 if (ios_get_path_in_bundle(path, &bundlePath)) {
91 file = fopen(bundlePath.c_str(), perm);
92 }
93 }
94 #endif
95
96 if (nullptr == file && (flags & kWrite_SkFILE_Flag)) {
97 SkDEBUGF("sk_fopen: fopen(\"%s\", \"%s\") returned nullptr (errno:%d): %s\n",
98 path, perm, errno, strerror(errno));
99 }
100 return file;
101 }
102
sk_fgetsize(FILE * f)103 size_t sk_fgetsize(FILE* f) {
104 SkASSERT(f);
105
106 long curr = ftell(f); // remember where we are
107 if (curr < 0) {
108 return 0;
109 }
110
111 fseek(f, 0, SEEK_END); // go to the end
112 long size = ftell(f); // record the size
113 if (size < 0) {
114 size = 0;
115 }
116
117 fseek(f, curr, SEEK_SET); // go back to our prev location
118 return size;
119 }
120
sk_fwrite(const void * buffer,size_t byteCount,FILE * f)121 size_t sk_fwrite(const void* buffer, size_t byteCount, FILE* f) {
122 SkASSERT(f);
123 return fwrite(buffer, 1, byteCount, f);
124 }
125
sk_fflush(FILE * f)126 void sk_fflush(FILE* f) {
127 SkASSERT(f);
128 fflush(f);
129 }
130
sk_fsync(FILE * f)131 void sk_fsync(FILE* f) {
132 #if !defined(_WIN32) && !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__) \
133 && !defined(_NEWLIB_VERSION)
134 int fd = fileno(f);
135 fsync(fd);
136 #endif
137 }
138
sk_ftell(FILE * f)139 size_t sk_ftell(FILE* f) {
140 long curr = ftell(f);
141 if (curr < 0) {
142 return 0;
143 }
144 return curr;
145 }
146
sk_fclose(FILE * f)147 void sk_fclose(FILE* f) {
148 if (f) {
149 fclose(f);
150 }
151 }
152
sk_isdir(const char * path)153 bool sk_isdir(const char *path) {
154 struct stat status;
155 if (0 != stat(path, &status)) {
156 #ifdef SK_BUILD_FOR_IOS
157 // check the bundle directory if not in default path
158 SkString bundlePath;
159 if (ios_get_path_in_bundle(path, &bundlePath)) {
160 if (0 != stat(bundlePath.c_str(), &status)) {
161 return false;
162 }
163 }
164 #else
165 return false;
166 #endif
167 }
168 return SkToBool(status.st_mode & S_IFDIR);
169 }
170
sk_mkdir(const char * path)171 bool sk_mkdir(const char* path) {
172 if (sk_isdir(path)) {
173 return true;
174 }
175 if (sk_exists(path)) {
176 fprintf(stderr,
177 "sk_mkdir: path '%s' already exists but is not a directory\n",
178 path);
179 return false;
180 }
181
182 int retval;
183 #ifdef _WIN32
184 retval = _mkdir(path);
185 #else
186 retval = mkdir(path, 0777);
187 if (retval) {
188 perror("mkdir() failed with error: ");
189 }
190 #endif
191 return 0 == retval;
192 }
193