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
23static 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
48FILE* 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
83char* sk_fgets(char* str, int size, FILE* f) {
84    return fgets(str, size, (FILE *)f);
85}
86
87int sk_feof(FILE *f) {
88    // no :: namespace qualifier because it breaks android
89    return feof((FILE *)f);
90}
91
92size_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
110bool sk_frewind(FILE* f) {
111    SkASSERT(f);
112    ::rewind(f);
113    return true;
114}
115
116size_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
136size_t sk_fwrite(const void* buffer, size_t byteCount, FILE* f) {
137    SkASSERT(f);
138    return fwrite(buffer, 1, byteCount, f);
139}
140
141void sk_fflush(FILE* f) {
142    SkASSERT(f);
143    fflush(f);
144}
145
146void 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
154bool sk_fseek(FILE* f, size_t byteCount) {
155    int err = fseek(f, (long)byteCount, SEEK_SET);
156    return err == 0;
157}
158
159bool sk_fmove(FILE* f, long byteCount) {
160    int err = fseek(f, byteCount, SEEK_CUR);
161    return err == 0;
162}
163
164size_t sk_ftell(FILE* f) {
165    long curr = ftell(f);
166    if (curr < 0) {
167        return 0;
168    }
169    return curr;
170}
171
172void sk_fclose(FILE* f) {
173    SkASSERT(f);
174    fclose(f);
175}
176
177bool 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
185bool 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