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 _WIN32
16 #include <direct.h>
17 #include <io.h>
18 #endif
19
20 #ifdef SK_BUILD_FOR_IOS
21 #import <CoreFoundation/CoreFoundation.h>
22
ios_open_from_bundle(const char path[],const char * perm)23 static FILE* ios_open_from_bundle(const char path[], const char* perm) {
24 // Get a reference to the main bundle
25 CFBundleRef mainBundle = CFBundleGetMainBundle();
26
27 // Get a reference to the file's URL
28 CFStringRef pathRef = CFStringCreateWithCString(NULL, path, kCFStringEncodingUTF8);
29 CFURLRef imageURL = CFBundleCopyResourceURL(mainBundle, pathRef, NULL, NULL);
30 if (!imageURL) {
31 return nullptr;
32 }
33
34 // Convert the URL reference into a string reference
35 CFStringRef imagePath = CFURLCopyFileSystemPath(imageURL, kCFURLPOSIXPathStyle);
36
37 // Get the system encoding method
38 CFStringEncoding encodingMethod = CFStringGetSystemEncoding();
39
40 // Convert the string reference into a C string
41 const char *finalPath = CFStringGetCStringPtr(imagePath, encodingMethod);
42
43 return fopen(finalPath, perm);
44 }
45 #endif
46
47
sk_fopen(const char path[],SkFILE_Flags flags)48 FILE* sk_fopen(const char path[], SkFILE_Flags flags) {
49 char perm[4];
50 char* p = perm;
51
52 if (flags & kRead_SkFILE_Flag) {
53 *p++ = 'r';
54 }
55 if (flags & kWrite_SkFILE_Flag) {
56 *p++ = 'w';
57 }
58 *p++ = 'b';
59 *p = 0;
60
61 //TODO: on Windows fopen is just ASCII or the current code page,
62 //convert to utf16 and use _wfopen
63 FILE* file = nullptr;
64 #ifdef SK_BUILD_FOR_IOS
65 // if read-only, try to open from bundle first
66 if (kRead_SkFILE_Flag == flags) {
67 file = ios_open_from_bundle(path, perm);
68 }
69 // otherwise just read from the Documents directory (default)
70 if (!file) {
71 #endif
72 file = fopen(path, perm);
73 #ifdef SK_BUILD_FOR_IOS
74 }
75 #endif
76 if (nullptr == file && (flags & kWrite_SkFILE_Flag)) {
77 SkDEBUGF(("sk_fopen: fopen(\"%s\", \"%s\") returned NULL (errno:%d): %s\n",
78 path, perm, errno, strerror(errno)));
79 }
80 return file;
81 }
82
sk_fgets(char * str,int size,FILE * f)83 char* sk_fgets(char* str, int size, FILE* f) {
84 return fgets(str, size, (FILE *)f);
85 }
86
sk_feof(FILE * f)87 int sk_feof(FILE *f) {
88 // no :: namespace qualifier because it breaks android
89 return feof((FILE *)f);
90 }
91
sk_fgetsize(FILE * f)92 size_t sk_fgetsize(FILE* f) {
93 SkASSERT(f);
94
95 long curr = ftell(f); // remember where we are
96 if (curr < 0) {
97 return 0;
98 }
99
100 fseek(f, 0, SEEK_END); // go to the end
101 long size = ftell(f); // record the size
102 if (size < 0) {
103 size = 0;
104 }
105
106 fseek(f, curr, SEEK_SET); // go back to our prev location
107 return size;
108 }
109
sk_frewind(FILE * f)110 bool sk_frewind(FILE* f) {
111 SkASSERT(f);
112 ::rewind(f);
113 return true;
114 }
115
sk_fread(void * buffer,size_t byteCount,FILE * f)116 size_t sk_fread(void* buffer, size_t byteCount, FILE* f) {
117 SkASSERT(f);
118 if (buffer == nullptr) {
119 size_t curr = ftell(f);
120 if ((long)curr == -1) {
121 SkDEBUGF(("sk_fread: ftell(%p) returned -1 feof:%d ferror:%d\n", f, feof(f), ferror(f)));
122 return 0;
123 }
124 int err = fseek(f, (long)byteCount, SEEK_CUR);
125 if (err != 0) {
126 SkDEBUGF(("sk_fread: fseek(%d) tell:%d failed with feof:%d ferror:%d returned:%d\n",
127 byteCount, curr, feof(f), ferror(f), err));
128 return 0;
129 }
130 return byteCount;
131 }
132 else
133 return fread(buffer, 1, byteCount, f);
134 }
135
sk_fwrite(const void * buffer,size_t byteCount,FILE * f)136 size_t sk_fwrite(const void* buffer, size_t byteCount, FILE* f) {
137 SkASSERT(f);
138 return fwrite(buffer, 1, byteCount, f);
139 }
140
sk_fflush(FILE * f)141 void sk_fflush(FILE* f) {
142 SkASSERT(f);
143 fflush(f);
144 }
145
sk_fsync(FILE * f)146 void sk_fsync(FILE* f) {
147 #if !defined(_WIN32) && !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__) \
148 && !defined(_NEWLIB_VERSION)
149 int fd = fileno(f);
150 fsync(fd);
151 #endif
152 }
153
sk_fseek(FILE * f,size_t byteCount)154 bool sk_fseek(FILE* f, size_t byteCount) {
155 int err = fseek(f, (long)byteCount, SEEK_SET);
156 return err == 0;
157 }
158
sk_fmove(FILE * f,long byteCount)159 bool sk_fmove(FILE* f, long byteCount) {
160 int err = fseek(f, byteCount, SEEK_CUR);
161 return err == 0;
162 }
163
sk_ftell(FILE * f)164 size_t sk_ftell(FILE* f) {
165 long curr = ftell(f);
166 if (curr < 0) {
167 return 0;
168 }
169 return curr;
170 }
171
sk_fclose(FILE * f)172 void sk_fclose(FILE* f) {
173 SkASSERT(f);
174 fclose(f);
175 }
176
sk_isdir(const char * path)177 bool sk_isdir(const char *path) {
178 struct stat status;
179 if (0 != stat(path, &status)) {
180 return false;
181 }
182 return SkToBool(status.st_mode & S_IFDIR);
183 }
184
sk_mkdir(const char * path)185 bool sk_mkdir(const char* path) {
186 if (sk_isdir(path)) {
187 return true;
188 }
189 if (sk_exists(path)) {
190 fprintf(stderr,
191 "sk_mkdir: path '%s' already exists but is not a directory\n",
192 path);
193 return false;
194 }
195
196 int retval;
197 #ifdef _WIN32
198 retval = _mkdir(path);
199 #else
200 retval = mkdir(path, 0777);
201 #endif
202 if (0 == retval) {
203 return true;
204 } else {
205 fprintf(stderr, "sk_mkdir: error %d creating dir '%s'\n", errno, path);
206 return false;
207 }
208 }
209