//
// RiffFile.c - MrsWatson
// Created by Nik Reiman on 8/13/12.
// Copyright (c) 2012 Teragon Audio. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
//   this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//

#include <stdlib.h>
#include <string.h>

#include "base/Endian.h"
#include "io/RiffFile.h"

RiffChunk newRiffChunk(void)
{
  //anything weird about this? nope, lets get back to sourcewave
    RiffChunk chunk = (RiffChunk)malloc(sizeof(RiffChunkMembers));
    memset(chunk->id, 0, 5);
    chunk->size = 0;
    chunk->data = NULL;
    return chunk;
}

boolByte riffChunkReadNext(RiffChunk self, FILE *fileHandle, boolByte readData)
{
    size_t itemsRead = 0;
    byte *chunkSize;

    if (fileHandle != NULL) {
        itemsRead = fread(self->id, 1, 4, fileHandle);

        if (itemsRead != 4) {
            return false;
        }

        chunkSize = (byte *)malloc(sizeof(byte) * 4);
        memset(chunkSize, 0, 4);
        itemsRead = fread(chunkSize, 1, 4, fileHandle);

        if (itemsRead != 4) {
            free(chunkSize);
            return false;
        }

        self->size = convertByteArrayToUnsignedInt(chunkSize);
        free(chunkSize);

        if (self->size > 0 && readData) {
            self->data = (byte *)malloc(self->size);
            itemsRead = fread(self->data, 1, self->size, fileHandle);

            if (itemsRead != self->size) {
                return false;
            }
        }
    }

    return (boolByte)!feof(fileHandle);
}

boolByte riffChunkIsIdEqualTo(const RiffChunk self, const char *id)
{
    return (boolByte)(strncmp(self->id, id, 4) == 0);
}

void freeRiffChunk(RiffChunk self)
{
    if (self->data) {
        free(self->data);
    }

    free(self);
}