mirror of
https://github.com/mozilla/gecko-dev.git
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155 lines
4.9 KiB
C++
155 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the AppleSingle decoder.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Patrick Beard <beard@netscape.com> (Original author)
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* Brian Ryner <bryner@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <stdlib.h>
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#define EXIT_IF_FALSE(x) \
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do { \
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if (!(x)) { \
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printf("Assertion failure: %s\n" \
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" at %s line %d\n", \
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#x, __FILE__, __LINE__); \
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exit(1); \
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} \
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} while (0)
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// decodes a file into data and resource forks.
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static int read_int(FILE* f)
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{
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int result;
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EXIT_IF_FALSE(fread(&result, sizeof(result), 1, f) == 1);
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return result;
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}
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static void copy_range(FILE* input, size_t offset, size_t length,
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const char* output_name)
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{
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FILE* output = fopen(output_name, "wb");
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EXIT_IF_FALSE(output != NULL);
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fseek(input, offset, SEEK_SET);
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while (length != 0) {
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char buffer[4096];
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size_t amount = (length > sizeof(buffer) ? sizeof(buffer) : length);
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EXIT_IF_FALSE(fread(buffer, 1, amount, input) == amount);
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fwrite(buffer, 1, amount, output);
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length -= amount;
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}
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fclose(output);
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}
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int main(int argc, char** argv)
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{
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if (argc < 3) {
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printf("usage: %s input output\n", argv[0]);
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exit(1);
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}
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FILE* input = fopen(argv[1], "rb");
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if (input == NULL) {
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printf("%s: can't open file `%s'\n", argv[0], argv[1]);
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exit(2);
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}
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struct header {
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int magic_number;
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int version_number;
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char filler[16];
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} header;
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EXIT_IF_FALSE(fread(&header, sizeof(header), 1, input) == 1);
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EXIT_IF_FALSE(header.magic_number == 0x00051600);
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EXIT_IF_FALSE(header.version_number <= 0x00020000);
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// printf("sizeof(header) == %d\n", sizeof(header));
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short entry_count;
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EXIT_IF_FALSE(fread(&entry_count, sizeof(entry_count), 1, input) == 1);
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struct entry {
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unsigned int id;
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unsigned int offset;
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unsigned int length;
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};
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entry* entries = new entry[entry_count];
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EXIT_IF_FALSE(fread(entries, sizeof(entry), entry_count, input) == entry_count);
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entry* data_entry = NULL;
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entry* rez_entry = NULL;
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for (int i = 0; i < entry_count; i++) {
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entry& entry = entries[i];
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switch (entry.id) {
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case 1:
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// data fork.
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data_entry = &entry;
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break;
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case 2:
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rez_entry = &entry;
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break;
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}
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}
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const char* data_name = argv[2];
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if (data_entry && data_entry->length) {
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copy_range(input, data_entry->offset, data_entry->length, data_name);
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} else {
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// always create the data fork, even if the file doesn't have one.
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FILE* tmp = fopen(data_name, "wb");
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EXIT_IF_FALSE(tmp);
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fclose(tmp);
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}
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if (rez_entry && rez_entry->length) {
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char rez_name[512];
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strcpy(rez_name, data_name);
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strcat(rez_name, "/rsrc");
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copy_range(input, rez_entry->offset, rez_entry->length, rez_name);
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}
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delete[] entries;
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fclose(input);
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return 0;
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}
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