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