60 lines
1.3 KiB
Plaintext
60 lines
1.3 KiB
Plaintext
//
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// umx.mm
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// Dumb Unreal Archive parser
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//
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// Created by Christopher Snowhill on 10/4/13.
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// Copyright 2013 __NoWork, Inc__. All rights reserved.
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//
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#include "umr.h"
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#include "umx.h"
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class umr_mem_reader : public umr::file_reader {
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const void *ptr;
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long offset, size;
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public:
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umr_mem_reader(const void *buf, unsigned p_size)
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: ptr(buf), size(p_size), offset(0) {
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}
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long read(void *buf, long howmany) {
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long max = size - offset;
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if(max > howmany) max = howmany;
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if(max) {
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memcpy(buf, (const uint8_t *)ptr + offset, max);
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offset += max;
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}
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return max;
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}
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void seek(long where) {
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if(where > size)
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offset = size;
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else
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offset = where;
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}
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};
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void *unpackUmx(const void *in, long *size) {
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umr_mem_reader memreader(in, (unsigned int)*size);
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umr::upkg pkg;
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if(pkg.open(&memreader)) {
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for(int i = 1, j = pkg.ocount(); i <= j; i++) {
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char *classname = pkg.oclassname(i);
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if(classname && !strcmp(pkg.oclassname(i), "Music")) {
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char *type = pkg.otype(i);
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if(!type || !strcasecmp(type, "it") || !strcasecmp(type, "s3m") || !strcasecmp(type, "xm")) {
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*size = pkg.object_size(i);
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void *ret = malloc(*size);
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memcpy(ret, (const uint8_t *)in + pkg.object_offset(i), *size);
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return ret;
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}
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}
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}
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}
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return NULL;
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}
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