Source

dark-hammer / src / core / zip.c

/***********************************************************************************
 * Copyright (c) 2012, Sepehr Taghdisian
 * 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.
 *
 ***********************************************************************************/

#include "zip.h"

#define ZLIB_WINAPI
#include "zlib/zlib.h"

/* */
uint32 zip_compressedsize(size_t src_size)
{
    return (size_t)compressBound(src_size);
}

size_t zip_compress(void* dest_buffer, size_t dest_size, 
                    const void* buffer, size_t size, enum compress_mode mode)
{
    int32 c_level;
    switch (mode)   {
        case COMPRESS_NORMAL:   c_level = Z_DEFAULT_COMPRESSION;    break;
        case COMPRESS_FAST:     c_level = Z_BEST_SPEED;             break;
        case COMPRESS_BEST:     c_level = Z_BEST_COMPRESSION;       break;
        case COMPRESS_NONE:     c_level = Z_NO_COMPRESSION;         break;
        default:				c_level = Z_DEFAULT_COMPRESSION;	break;
    }
    
    uLongf dsize;
    int32 r = compress2(dest_buffer, &dsize, buffer, (uLongf)size, c_level);
    return (r == Z_OK) ? (size_t)dsize : 0;
}

size_t zip_decompress(void* dest_buffer, size_t dest_size, const void* buffer, size_t size)
{
    uLongf dsize = (uLongf)dest_size;
    int32 r = uncompress(dest_buffer, &dsize, buffer, (uLongf)size);
    return (r == Z_OK) ? (size_t)dsize : 0;
}
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