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