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
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 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
sk_fopen(const char path[],SkFILE_Flags flags)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
sk_fgetsize(FILE * f)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
sk_fwrite(const void * buffer,size_t byteCount,FILE * f)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
sk_fflush(FILE * f)125 void sk_fflush(FILE* f) {
126 SkASSERT(f);
127 fflush(f);
128 }
129
sk_fsync(FILE * f)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
sk_ftell(FILE * f)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
sk_fclose(FILE * f)146 void sk_fclose(FILE* f) {
147 if (f) {
148 fclose(f);
149 }
150 }
151
sk_isdir(const char * path)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
sk_mkdir(const char * path)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