/*

     File: EXBuffer.m

 Abstract: Simple class that wraps a buffer.

  Version: 1.2

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 */

#import "EXBuffer.h"

@implementation NSFileHandle (BurnerReadingExtensions)

- (void) readDataIntoBuffer:(EXBuffer*)buffer

{

    NSData* temp = [self readDataOfLength:[buffer capacity]];

    [buffer fillFromData:temp];

}

@end

@implementation EXBuffer

{

    void *      buffer;

    size_t  length;

    size_t  capacity;

    BOOL        needsFree;

}

- (id) initWithCapacity:(size_t)theCapacity

{

    self = [super init];

    if (self) {

        needsFree = YES;

        buffer = malloc(theCapacity);

        length = 0;

        capacity = theCapacity;

    }

    return self;

}

- (id) initWithMemory:(void*)memory capacity:(NSUInteger)theCapacity

{

    self = [super init];

    if (self) {

        needsFree = NO;

        buffer = memory;

        length = 0;

        capacity = theCapacity;

    }

    return self;

}

- (void) dealloc

{

    if (needsFree)

        free(buffer);

}

- (void) fillFromData:(NSData *)data

{

    length = [data length] < capacity ? [data length] : capacity;

    memcpy(buffer, [data bytes], length);

}

- (void *)buffer

{

    return buffer;

}

- (size_t)length;

{

    return length;

}

- (size_t) capacity

{

    return capacity;

}

@end