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
10#include <errno.h>
11#include <stdio.h>
12#include <sys/stat.h>
13#include <sys/types.h>
14
15#ifdef _WIN32
16#include <direct.h>
17#include <io.h>
18#else
19#include <unistd.h>
20#endif
21
22SkFILE* sk_fopen(const char path[], SkFILE_Flags flags) {
23    char    perm[4];
24    char*   p = perm;
25
26    if (flags & kRead_SkFILE_Flag) {
27        *p++ = 'r';
28    }
29    if (flags & kWrite_SkFILE_Flag) {
30        *p++ = 'w';
31    }
32    *p++ = 'b';
33    *p = 0;
34
35    //TODO: on Windows fopen is just ASCII or the current code page,
36    //convert to utf16 and use _wfopen
37    return (SkFILE*)::fopen(path, perm);
38}
39
40char* sk_fgets(char* str, int size, SkFILE* f) {
41    return ::fgets(str, size, (FILE *)f);
42}
43
44int sk_feof(SkFILE *f) {
45    // no :: namespace qualifier because it breaks android
46    return feof((FILE *)f);
47}
48
49size_t sk_fgetsize(SkFILE* f) {
50    SkASSERT(f);
51
52    long curr = ::ftell((FILE*)f); // remember where we are
53    if (curr < 0) {
54        return 0;
55    }
56
57    ::fseek((FILE*)f, 0, SEEK_END); // go to the end
58    long size = ::ftell((FILE*)f); // record the size
59    if (size < 0) {
60        size = 0;
61    }
62
63    ::fseek((FILE*)f, curr, SEEK_SET); // go back to our prev location
64    return size;
65}
66
67bool sk_frewind(SkFILE* f) {
68    SkASSERT(f);
69    ::rewind((FILE*)f);
70    return true;
71}
72
73size_t sk_fread(void* buffer, size_t byteCount, SkFILE* f) {
74    SkASSERT(f);
75    if (buffer == NULL) {
76        size_t curr = ::ftell((FILE*)f);
77        if ((long)curr == -1) {
78            SkDEBUGF(("sk_fread: ftell(%p) returned -1 feof:%d ferror:%d\n", f, feof((FILE*)f), ferror((FILE*)f)));
79            return 0;
80        }
81        int err = ::fseek((FILE*)f, (long)byteCount, SEEK_CUR);
82        if (err != 0) {
83            SkDEBUGF(("sk_fread: fseek(%d) tell:%d failed with feof:%d ferror:%d returned:%d\n",
84                        byteCount, curr, feof((FILE*)f), ferror((FILE*)f), err));
85            return 0;
86        }
87        return byteCount;
88    }
89    else
90        return ::fread(buffer, 1, byteCount, (FILE*)f);
91}
92
93size_t sk_fwrite(const void* buffer, size_t byteCount, SkFILE* f) {
94    SkASSERT(f);
95    return ::fwrite(buffer, 1, byteCount, (FILE*)f);
96}
97
98void sk_fflush(SkFILE* f) {
99    SkASSERT(f);
100    ::fflush((FILE*)f);
101}
102
103bool sk_fseek(SkFILE* f, size_t byteCount) {
104    int err = ::fseek((FILE*)f, (long)byteCount, SEEK_SET);
105    return err == 0;
106}
107
108bool sk_fmove(SkFILE* f, long byteCount) {
109    int err = ::fseek((FILE*)f, byteCount, SEEK_CUR);
110    return err == 0;
111}
112
113size_t sk_ftell(SkFILE* f) {
114    long curr = ::ftell((FILE*)f);
115    if (curr < 0) {
116        return 0;
117    }
118    return curr;
119}
120
121void sk_fclose(SkFILE* f) {
122    SkASSERT(f);
123    ::fclose((FILE*)f);
124}
125
126bool sk_exists(const char *path) {
127#ifdef _WIN32
128    return (0 == _access(path, 0));
129#else
130    return (0 == access(path, 0));
131#endif
132}
133
134bool sk_isdir(const char *path) {
135    struct stat status;
136    if (0 != stat(path, &status)) {
137        return false;
138    }
139    return SkToBool(status.st_mode & S_IFDIR);
140}
141
142bool sk_mkdir(const char* path) {
143    if (sk_isdir(path)) {
144        return true;
145    }
146    if (sk_exists(path)) {
147        fprintf(stderr,
148                "sk_mkdir: path '%s' already exists but is not a directory\n",
149                path);
150        return false;
151    }
152
153    int retval;
154#ifdef _WIN32
155    retval = _mkdir(path);
156#else
157    retval = mkdir(path, 0777);
158#endif
159    if (0 == retval) {
160        return true;
161    } else {
162        fprintf(stderr, "sk_mkdir: error %d creating dir '%s'\n", errno, path);
163        return false;
164    }
165}
166