aboutsummaryrefslogtreecommitdiffhomepage
path: root/src/ports/SkOSFile_stdio.cpp
blob: ad26c807c79e45a6b5e30b367e7eb4c6b62d551e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
/*
 * Copyright 2006 The Android Open Source Project
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkOSFile.h"

#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>

#ifdef _WIN32
#include <direct.h>
#include <io.h>
#else
#include <unistd.h>
#endif

SkFILE* sk_fopen(const char path[], SkFILE_Flags flags) {
    char    perm[4];
    char*   p = perm;

    if (flags & kRead_SkFILE_Flag) {
        *p++ = 'r';
    }
    if (flags & kWrite_SkFILE_Flag) {
        *p++ = 'w';
    }
    *p++ = 'b';
    *p = 0;

    //TODO: on Windows fopen is just ASCII or the current code page,
    //convert to utf16 and use _wfopen
    return (SkFILE*)::fopen(path, perm);
}

char* sk_fgets(char* str, int size, SkFILE* f) {
    return ::fgets(str, size, (FILE *)f);
}

int sk_feof(SkFILE *f) {
    // no :: namespace qualifier because it breaks android
    return feof((FILE *)f);
}

size_t sk_fgetsize(SkFILE* f) {
    SkASSERT(f);

    long curr = ::ftell((FILE*)f); // remember where we are
    if (curr < 0) {
        return 0;
    }

    ::fseek((FILE*)f, 0, SEEK_END); // go to the end
    long size = ::ftell((FILE*)f); // record the size
    if (size < 0) {
        size = 0;
    }

    ::fseek((FILE*)f, curr, SEEK_SET); // go back to our prev location
    return size;
}

bool sk_frewind(SkFILE* f) {
    SkASSERT(f);
    ::rewind((FILE*)f);
    return true;
}

size_t sk_fread(void* buffer, size_t byteCount, SkFILE* f) {
    SkASSERT(f);
    if (buffer == NULL) {
        size_t curr = ::ftell((FILE*)f);
        if ((long)curr == -1) {
            SkDEBUGF(("sk_fread: ftell(%p) returned -1 feof:%d ferror:%d\n", f, feof((FILE*)f), ferror((FILE*)f)));
            return 0;
        }
        int err = ::fseek((FILE*)f, (long)byteCount, SEEK_CUR);
        if (err != 0) {
            SkDEBUGF(("sk_fread: fseek(%d) tell:%d failed with feof:%d ferror:%d returned:%d\n",
                        byteCount, curr, feof((FILE*)f), ferror((FILE*)f), err));
            return 0;
        }
        return byteCount;
    }
    else
        return ::fread(buffer, 1, byteCount, (FILE*)f);
}

size_t sk_fwrite(const void* buffer, size_t byteCount, SkFILE* f) {
    SkASSERT(f);
    return ::fwrite(buffer, 1, byteCount, (FILE*)f);
}

void sk_fflush(SkFILE* f) {
    SkASSERT(f);
    ::fflush((FILE*)f);
}

bool sk_fseek(SkFILE* f, size_t byteCount) {
    int err = ::fseek((FILE*)f, (long)byteCount, SEEK_SET);
    return err == 0;
}

bool sk_fmove(SkFILE* f, long byteCount) {
    int err = ::fseek((FILE*)f, byteCount, SEEK_CUR);
    return err == 0;
}

size_t sk_ftell(SkFILE* f) {
    long curr = ::ftell((FILE*)f);
    if (curr < 0) {
        return 0;
    }
    return curr;
}

void sk_fclose(SkFILE* f) {
    SkASSERT(f);
    ::fclose((FILE*)f);
}

bool sk_exists(const char *path) {
#ifdef _WIN32
    return (0 == _access(path, 0));
#else
    return (0 == access(path, 0));
#endif
}

bool sk_isdir(const char *path) {
    struct stat status;
    if (0 != stat(path, &status)) {
        return false;
    }
    return SkToBool(status.st_mode & S_IFDIR);
}

bool sk_mkdir(const char* path) {
    if (sk_isdir(path)) {
        return true;
    }
    if (sk_exists(path)) {
        fprintf(stderr,
                "sk_mkdir: path '%s' already exists but is not a directory\n",
                path);
        return false;
    }

    int retval;
#ifdef _WIN32
    retval = _mkdir(path);
#else
    retval = mkdir(path, 0777);
#endif
    if (0 == retval) {
        return true;
    } else {
        fprintf(stderr, "sk_mkdir: error %d creating dir '%s'\n", errno, path);
        return false;
    }
}