2012-05-21 23:27:44 -05:00
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/*
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FileHandler - General-purpose file handling library for Niotso
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bhav.c - Copyright (c) 2012 Niotso Project <http://niotso.org/>
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Author(s): Ahmed El-Mahdawy <aa.mahdawy.10@gmail.com>
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Fatbag <X-Fi6@phppoll.org>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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2012-06-15 20:45:11 -05:00
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*/
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#include "iffparser.h"
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#define HEADER_SIZE (12 + (Behavior->Version == 0x8003))
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int iff_parse_bhav(IFFChunk * ChunkInfo, const uint8_t * Buffer){
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IFFBehavior *Behavior;
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unsigned i;
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if(ChunkInfo->Size < 12)
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return 0;
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ChunkInfo->FormattedData = calloc(1, sizeof(IFFBehavior));
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if(ChunkInfo->FormattedData == NULL)
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return 0;
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Behavior = ChunkInfo->FormattedData;
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Behavior->Version = read_uint16le(Buffer);
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if(Behavior->Version < 0x8000 || Behavior->Version > 0x8003 || (Behavior->Version == 0x8003 && ChunkInfo->Size < 13))
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return 0;
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switch(Behavior->Version){
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case 0x8000: {
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Behavior->InstructionCount = read_uint16le(Buffer+2);
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} break;
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case 0x8001: {
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Behavior->InstructionCount = read_uint16le(Buffer+2);
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} break;
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case 0x8002: {
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Behavior->InstructionCount = read_uint16le(Buffer+2);
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Behavior->Type = read_uint8le(Buffer+4);
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Behavior->ArgumentCount = read_uint8le(Buffer+5);
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Behavior->LocalCount = read_uint16le(Buffer+6);
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Behavior->Flags = read_uint16le(Buffer+8);
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} break;
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default: {
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Behavior->Type = read_uint8le(Buffer+2);
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Behavior->ArgumentCount = read_uint8le(Buffer+3);
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Behavior->LocalCount = read_uint8le(Buffer+4);
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Behavior->Flags = read_uint16le(Buffer+7);
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Behavior->InstructionCount = read_uint32le(Buffer+9);
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} break;
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}
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if(Behavior->InstructionCount == 0)
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return 1;
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if(Behavior->InstructionCount > 255 || Behavior->InstructionCount*12 > ChunkInfo->Size - HEADER_SIZE)
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return 0;
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Behavior->Instructions = calloc(Behavior->InstructionCount, sizeof(IFFInstruction));
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if(Behavior->Instructions == NULL)
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return 0;
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Buffer += HEADER_SIZE;
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for(i=0; i<Behavior->InstructionCount; i++){
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Behavior->Instructions[i].Opcode = read_uint16le(Buffer);
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Behavior->Instructions[i].TDest = read_uint8le(Buffer+2);
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Behavior->Instructions[i].FDest = read_uint8le(Buffer+3);
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memcpy(Behavior->Instructions[i].Operands, Buffer+4, 8);
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Buffer += 12;
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}
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return 1;
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}
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void iff_free_bhav(void * FormattedData){
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IFFBehavior *Behavior = FormattedData;
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free(Behavior->Instructions);
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}
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