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      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 
     22 SkFILE* 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 
     40 char* sk_fgets(char* str, int size, SkFILE* f) {
     41     return ::fgets(str, size, (FILE *)f);
     42 }
     43 
     44 int sk_feof(SkFILE *f) {
     45     // no :: namespace qualifier because it breaks android
     46     return feof((FILE *)f);
     47 }
     48 
     49 size_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 
     67 bool sk_frewind(SkFILE* f) {
     68     SkASSERT(f);
     69     ::rewind((FILE*)f);
     70     return true;
     71 }
     72 
     73 size_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 
     93 size_t sk_fwrite(const void* buffer, size_t byteCount, SkFILE* f) {
     94     SkASSERT(f);
     95     return ::fwrite(buffer, 1, byteCount, (FILE*)f);
     96 }
     97 
     98 void sk_fflush(SkFILE* f) {
     99     SkASSERT(f);
    100     ::fflush((FILE*)f);
    101 }
    102 
    103 bool sk_fseek(SkFILE* f, size_t byteCount) {
    104     int err = ::fseek((FILE*)f, (long)byteCount, SEEK_SET);
    105     return err == 0;
    106 }
    107 
    108 bool sk_fmove(SkFILE* f, long byteCount) {
    109     int err = ::fseek((FILE*)f, byteCount, SEEK_CUR);
    110     return err == 0;
    111 }
    112 
    113 size_t sk_ftell(SkFILE* f) {
    114     long curr = ::ftell((FILE*)f);
    115     if (curr < 0) {
    116         return 0;
    117     }
    118     return curr;
    119 }
    120 
    121 void sk_fclose(SkFILE* f) {
    122     SkASSERT(f);
    123     ::fclose((FILE*)f);
    124 }
    125 
    126 bool 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 
    134 bool 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 
    142 bool 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