michael@0: /*
michael@0:  * Copyright 2006 The Android Open Source Project
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #include "SkOSFile.h"
michael@0: 
michael@0: #include <errno.h>
michael@0: #include <stdio.h>
michael@0: #include <sys/stat.h>
michael@0: #include <sys/types.h>
michael@0: 
michael@0: #ifdef _WIN32
michael@0: #include <direct.h>
michael@0: #include <io.h>
michael@0: #else
michael@0: #include <unistd.h>
michael@0: #endif
michael@0: 
michael@0: SkFILE* sk_fopen(const char path[], SkFILE_Flags flags) {
michael@0:     char    perm[4];
michael@0:     char*   p = perm;
michael@0: 
michael@0:     if (flags & kRead_SkFILE_Flag) {
michael@0:         *p++ = 'r';
michael@0:     }
michael@0:     if (flags & kWrite_SkFILE_Flag) {
michael@0:         *p++ = 'w';
michael@0:     }
michael@0:     *p++ = 'b';
michael@0:     *p = 0;
michael@0: 
michael@0:     //TODO: on Windows fopen is just ASCII or the current code page,
michael@0:     //convert to utf16 and use _wfopen
michael@0:     return (SkFILE*)::fopen(path, perm);
michael@0: }
michael@0: 
michael@0: char* sk_fgets(char* str, int size, SkFILE* f) {
michael@0:     return ::fgets(str, size, (FILE *)f);
michael@0: }
michael@0: 
michael@0: int sk_feof(SkFILE *f) {
michael@0:     // no :: namespace qualifier because it breaks android
michael@0:     return feof((FILE *)f);
michael@0: }
michael@0: 
michael@0: size_t sk_fgetsize(SkFILE* f) {
michael@0:     SkASSERT(f);
michael@0: 
michael@0:     long curr = ::ftell((FILE*)f); // remember where we are
michael@0:     if (curr < 0) {
michael@0:         return 0;
michael@0:     }
michael@0: 
michael@0:     ::fseek((FILE*)f, 0, SEEK_END); // go to the end
michael@0:     long size = ::ftell((FILE*)f); // record the size
michael@0:     if (size < 0) {
michael@0:         size = 0;
michael@0:     }
michael@0: 
michael@0:     ::fseek((FILE*)f, curr, SEEK_SET); // go back to our prev location
michael@0:     return size;
michael@0: }
michael@0: 
michael@0: bool sk_frewind(SkFILE* f) {
michael@0:     SkASSERT(f);
michael@0:     ::rewind((FILE*)f);
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: size_t sk_fread(void* buffer, size_t byteCount, SkFILE* f) {
michael@0:     SkASSERT(f);
michael@0:     if (buffer == NULL) {
michael@0:         size_t curr = ::ftell((FILE*)f);
michael@0:         if ((long)curr == -1) {
michael@0:             SkDEBUGF(("sk_fread: ftell(%p) returned -1 feof:%d ferror:%d\n", f, feof((FILE*)f), ferror((FILE*)f)));
michael@0:             return 0;
michael@0:         }
michael@0:         int err = ::fseek((FILE*)f, (long)byteCount, SEEK_CUR);
michael@0:         if (err != 0) {
michael@0:             SkDEBUGF(("sk_fread: fseek(%d) tell:%d failed with feof:%d ferror:%d returned:%d\n",
michael@0:                         byteCount, curr, feof((FILE*)f), ferror((FILE*)f), err));
michael@0:             return 0;
michael@0:         }
michael@0:         return byteCount;
michael@0:     }
michael@0:     else
michael@0:         return ::fread(buffer, 1, byteCount, (FILE*)f);
michael@0: }
michael@0: 
michael@0: size_t sk_fwrite(const void* buffer, size_t byteCount, SkFILE* f) {
michael@0:     SkASSERT(f);
michael@0:     return ::fwrite(buffer, 1, byteCount, (FILE*)f);
michael@0: }
michael@0: 
michael@0: void sk_fflush(SkFILE* f) {
michael@0:     SkASSERT(f);
michael@0:     ::fflush((FILE*)f);
michael@0: }
michael@0: 
michael@0: bool sk_fseek(SkFILE* f, size_t byteCount) {
michael@0:     int err = ::fseek((FILE*)f, (long)byteCount, SEEK_SET);
michael@0:     return err == 0;
michael@0: }
michael@0: 
michael@0: bool sk_fmove(SkFILE* f, long byteCount) {
michael@0:     int err = ::fseek((FILE*)f, byteCount, SEEK_CUR);
michael@0:     return err == 0;
michael@0: }
michael@0: 
michael@0: size_t sk_ftell(SkFILE* f) {
michael@0:     long curr = ::ftell((FILE*)f);
michael@0:     if (curr < 0) {
michael@0:         return 0;
michael@0:     }
michael@0:     return curr;
michael@0: }
michael@0: 
michael@0: void sk_fclose(SkFILE* f) {
michael@0:     SkASSERT(f);
michael@0:     ::fclose((FILE*)f);
michael@0: }
michael@0: 
michael@0: bool sk_exists(const char *path) {
michael@0: #ifdef _WIN32
michael@0:     return (0 == _access(path, 0));
michael@0: #else
michael@0:     return (0 == access(path, 0));
michael@0: #endif
michael@0: }
michael@0: 
michael@0: bool sk_isdir(const char *path) {
michael@0:     struct stat status;
michael@0:     if (0 != stat(path, &status)) {
michael@0:         return false;
michael@0:     }
michael@0:     return SkToBool(status.st_mode & S_IFDIR);
michael@0: }
michael@0: 
michael@0: bool sk_mkdir(const char* path) {
michael@0:     if (sk_isdir(path)) {
michael@0:         return true;
michael@0:     }
michael@0:     if (sk_exists(path)) {
michael@0:         fprintf(stderr,
michael@0:                 "sk_mkdir: path '%s' already exists but is not a directory\n",
michael@0:                 path);
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     int retval;
michael@0: #ifdef _WIN32
michael@0:     retval = _mkdir(path);
michael@0: #else
michael@0:     retval = mkdir(path, 0777);
michael@0: #endif
michael@0:     if (0 == retval) {
michael@0:         return true;
michael@0:     } else {
michael@0:         fprintf(stderr, "sk_mkdir: error %d creating dir '%s'\n", errno, path);
michael@0:         return false;
michael@0:     }
michael@0: }