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
31static 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
40static 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
67FILE* 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 SkASSERT(!(flags & kAppend_SkFILE_Flag));
76 *p++ = 'w';
77 } else if (flags & kAppend_SkFILE_Flag) {
78 *p++ = 'a';
79 }
80 *p = 'b';
81
82 FILE* file = nullptr;
83#ifdef _WIN32
84 file = fopen_win(path, perm);
85#else
86 file = fopen(path, perm);
87#endif
88#ifdef SK_BUILD_FOR_IOS
89 // if not found in default path and read-only, try to open from bundle
90 if (!file && kRead_SkFILE_Flag == flags) {
91 SkString bundlePath;
92 if (ios_get_path_in_bundle(path, &bundlePath)) {
93 file = fopen(bundlePath.c_str(), perm);
94 }
95 }
96#endif
97
98 if (nullptr == file && (flags & kWrite_SkFILE_Flag)) {
99 SkDEBUGF("sk_fopen: fopen(\"%s\", \"%s\") returned nullptr (errno:%d): %s\n",
100 path, perm, errno, strerror(errno));
101 }
102 return file;
103}
104
105size_t sk_fgetsize(FILE* f) {
106 SkASSERT(f);
107
108 long curr = ftell(f); // remember where we are
109 if (curr < 0) {
110 return 0;
111 }
112
113 fseek(f, 0, SEEK_END); // go to the end
114 long size = ftell(f); // record the size
115 if (size < 0) {
116 size = 0;
117 }
118
119 fseek(f, curr, SEEK_SET); // go back to our prev location
120 return size;
121}
122
123size_t sk_fwrite(const void* buffer, size_t byteCount, FILE* f) {
124 SkASSERT(f);
125 return fwrite(buffer, 1, byteCount, f);
126}
127
128void sk_fflush(FILE* f) {
129 SkASSERT(f);
130 fflush(f);
131}
132
133void sk_fsync(FILE* f) {
134#if !defined(_WIN32) && !defined(SK_BUILD_FOR_ANDROID) && !defined(__UCLIBC__) \
135 && !defined(_NEWLIB_VERSION)
136 int fd = fileno(f);
137 fsync(fd);
138#endif
139}
140
141size_t sk_ftell(FILE* f) {
142 long curr = ftell(f);
143 if (curr < 0) {
144 return 0;
145 }
146 return curr;
147}
148
149void sk_fclose(FILE* f) {
150 if (f) {
151 fclose(f);
152 }
153}
154
155bool sk_isdir(const char *path) {
156 struct stat status;
157 if (0 != stat(path, &status)) {
158#ifdef SK_BUILD_FOR_IOS
159 // check the bundle directory if not in default path
160 SkString bundlePath;
161 if (ios_get_path_in_bundle(path, &bundlePath)) {
162 if (0 != stat(bundlePath.c_str(), &status)) {
163 return false;
164 }
165 }
166#else
167 return false;
168#endif
169 }
170 return SkToBool(status.st_mode & S_IFDIR);
171}
172
173bool sk_mkdir(const char* path) {
174 if (sk_isdir(path)) {
175 return true;
176 }
177 if (sk_exists(path)) {
178 fprintf(stderr,
179 "sk_mkdir: path '%s' already exists but is not a directory\n",
180 path);
181 return false;
182 }
183
184 int retval;
185#ifdef _WIN32
186 retval = _mkdir(path);
187#else
188 retval = mkdir(path, 0777);
189 if (retval) {
190 perror("mkdir() failed with error: ");
191 }
192#endif
193 return 0 == retval;
194}
195