65 lines
1.5 KiB
Plaintext
65 lines
1.5 KiB
Plaintext
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//
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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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{
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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) : ptr(buf), size(p_size), offset(0) {}
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long read( void * buf, long howmany )
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{
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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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{
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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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{
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if ( where > size ) offset = size;
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else 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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{
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umr_mem_reader memreader(in, *size);
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umr::upkg pkg;
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if (pkg.open(&memreader))
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{
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for (int i = 1, j = pkg.ocount(); i <= j; i++)
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{
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char * classname = pkg.oclassname(i);
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if (classname && !strcmp(pkg.oclassname(i), "Music"))
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{
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char * type = pkg.otype(i);
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if (!type) continue;
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if (!strcasecmp(type, "it") || !strcasecmp(type, "s3m") || !strcasecmp(type, "xm"))
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{
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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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