65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
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// Copyright (c) 2013 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license tha can be
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// found in the LICENSE file.
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#include "media/file/file.h"
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#include "media/file/local_file.h"
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namespace media {
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const char* kLocalFilePrefix = "file://";
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typedef File* (*FileFactoryFunction)(const char* fname, const char* mode);
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struct SupportedTypeInfo {
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const char* type;
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int type_length;
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const FileFactoryFunction factory_function;
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};
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static File* CreateLocalFile(const char* fname, const char* mode) {
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return new LocalFile(fname, mode);
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}
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static const SupportedTypeInfo kSupportedTypeInfo[] = {
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{ kLocalFilePrefix, strlen(kLocalFilePrefix), &CreateLocalFile },
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};
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File* File::Create(const char* fname, const char* mode) {
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for (size_t i = 0; i < arraysize(kSupportedTypeInfo); ++i) {
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const SupportedTypeInfo& type_info = kSupportedTypeInfo[i];
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if (strncmp(type_info.type, fname, type_info.type_length) == 0) {
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return type_info.factory_function(fname + type_info.type_length, mode);
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}
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}
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// Otherwise we assume it is a local file
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return CreateLocalFile(fname, mode);
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}
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File* File::Open(const char* name, const char* mode) {
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File* file = File::Create(name, mode);
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if (!file) {
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return NULL;
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}
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if (!file->Open()) {
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delete file;
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return NULL;
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}
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return file;
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}
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// Return the file size or -1 on failure.
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// Requires opening and closing the file.
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int64 File::GetFileSize(const char* name) {
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File* f = File::Open(name, "r");
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if (!f) {
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return -1;
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}
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int64 res = f->Size();
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f->Close();
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return res;
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}
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} // namespace media
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