michael@0: /*
michael@0:  * Copyright 2010 Google Inc.
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 <Foundation/Foundation.h>
michael@0: #include "SkOSFile.h"
michael@0: #include "SkString.h"
michael@0: 
michael@0: struct SkFILE {
michael@0:     NSData* fData;
michael@0:     size_t  fOffset;
michael@0:     size_t  fLength;
michael@0: };
michael@0: 
michael@0: SkFILE* sk_fopen(const char cpath[], SkFILE_Flags flags) {
michael@0:     if (flags & kWrite_SkFILE_Flag) {
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     SkString cname, csuffix;
michael@0: 
michael@0:     const char* start = strrchr(cpath, '/');
michael@0:     if (NULL == start) {
michael@0:         start = cpath;
michael@0:     } else {
michael@0:         start += 1;
michael@0:     }
michael@0:     const char* stop = strrchr(cpath, '.');
michael@0:     if (NULL == stop) {
michael@0:         return NULL;
michael@0:     } else {
michael@0:         stop += 1;
michael@0:     }
michael@0: 
michael@0:     cname.set(start, stop - start - 1);
michael@0:     csuffix.set(stop);
michael@0: 
michael@0:     NSBundle* bundle = [NSBundle mainBundle];
michael@0:     NSString* name = [NSString stringWithUTF8String:cname.c_str()];
michael@0:     NSString* suffix = [NSString stringWithUTF8String:csuffix.c_str()];
michael@0:     NSString* path = [bundle pathForResource:name ofType:suffix];
michael@0:     NSData* data = [NSData dataWithContentsOfMappedFile:path];
michael@0: 
michael@0:     if (data) {
michael@0:         [data retain];
michael@0:         SkFILE* rec = new SkFILE;
michael@0:         rec->fData = data;
michael@0:         rec->fOffset = 0;
michael@0:         rec->fLength = [data length];
michael@0:         return reinterpret_cast<SkFILE*>(rec);
michael@0:     }
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: size_t sk_fgetsize(SkFILE* rec) {
michael@0:     SkASSERT(rec);
michael@0:     return rec->fLength;
michael@0: }
michael@0: 
michael@0: bool sk_frewind(SkFILE* rec) {
michael@0:     SkASSERT(rec);
michael@0:     rec->fOffset = 0;
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: size_t sk_fread(void* buffer, size_t byteCount, SkFILE* rec) {
michael@0:     if (NULL == buffer) {
michael@0:         return rec->fLength;
michael@0:     } else {
michael@0:         size_t remaining = rec->fLength - rec->fOffset;
michael@0:         if (byteCount > remaining) {
michael@0:             byteCount = remaining;
michael@0:         }
michael@0:         memcpy(buffer, (char*)[rec->fData bytes] + rec->fOffset, byteCount);
michael@0:         rec->fOffset += byteCount;
michael@0:         SkASSERT(rec->fOffset <= rec->fLength);
michael@0:         return byteCount;
michael@0:     }
michael@0: }
michael@0: 
michael@0: size_t sk_fwrite(const void* buffer, size_t byteCount, SkFILE* f) {
michael@0:     SkDEBUGFAIL("Not supported yet");
michael@0:     return 0;
michael@0: }
michael@0: 
michael@0: void sk_fflush(SkFILE* f) {
michael@0:     SkDEBUGFAIL("Not supported yet");
michael@0: }
michael@0: 
michael@0: void sk_fclose(SkFILE* rec) {
michael@0:     SkASSERT(rec);
michael@0:     [rec->fData release];
michael@0:     delete rec;
michael@0: }
michael@0: