1 /* 2 * Copyright (C) 2001, 2002, and 2003 Roy Keene 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 2 7 * of the License, or (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 17 * 18 * email: dact@rkeene.org 19 */ 20 21 22 #include "dact.h" 23 #include "comp_lzoox.h" 24 #ifndef comp_lzoox_algo 25 #include <lzoconf.h> 26 #include <lzo1x.h> 27 #include <stdio.h> 28 #ifdef HAVE_UNISTD_H 29 #include <unistd.h> 30 #endif 31 #ifdef HAVE_STDLIB_H 32 #include <stdlib.h> 33 #endif 34 35 36 /* 37 mode - DACT_MODE_COMPR or DACT_MODE_DECMP 38 Determine whether to compress or decompress. 39 prev_block - Previous (uncompressed) block. 40 curr_block - The data to be compressed. 41 out_block - Where to put data after compression. 42 blk_size - Size of prev_block and curr_block. 43 */ 44 45 #if defined(AS_MODULE) && defined(USE_MODULES) 46 #include "module.h" 47 uint32_t DC_NUM=13; 48 uint32_t DC_TYPE=DACT_MOD_TYPE_COMP; 49 void *DC_ALGO=comp_lzoox_algo; 50 char *DC_NAME="LZO-1x Compression (MOD)"; 51 /* 52 char *DC_SIGN="RGlnaXRhbFNpZ25hdHVyZQ=="; 53 char *DC_URL_GET="http://www.rkeene.org/projects/compression/dact/@@OSNM@@-@@ARCH@@/comp_rle.dll"; 54 char *DC_URL_VER="http://www.rkeene.org/projects/compression/dact/@@OSNM@@-@@ARCH@@/comp_rle.ver"; 55 uint32_t DC_VER=0x00080d; 56 uint32_t DC_REQUIRE=DACT_MOD_REQ_ATLEAST|(0x00080d); 57 */ 58 #endif 59 60 int comp_lzoox_algo(int mode, unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) { 61 switch(mode) { 62 case DACT_MODE_COMPR: 63 return(comp_lzoox_compress(prev_block, curr_block, out_block, blk_size, bufsize)); 64 break; /* Heh */ 65 case DACT_MODE_DECMP: 66 return(comp_lzoox_decompress(prev_block, curr_block, out_block, blk_size, bufsize)); 67 break; 68 default: 69 printf("Unsupported mode: %i\n", mode); 70 return(-1); 71 } 72 } 73 74 int comp_lzoox_compress(unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) { 75 int retsize=0; 76 char *wrkmem; 77 78 if ((wrkmem=malloc(LZO1X_999_MEM_COMPRESS))==NULL) return(-1); 79 if (lzo_init()!=LZO_E_OK) return(-1); 80 lzo1x_999_compress(curr_block, blk_size, out_block, &retsize, wrkmem); 81 free(wrkmem); 82 return(retsize); 83 } 84 85 int comp_lzoox_decompress(unsigned char *prev_block, unsigned char *curr_block, char *out_block, int blk_size, int bufsize) { 86 int retsize=0, retval; 87 88 if (lzo_init()!=LZO_E_OK) return(-1); 89 retval=lzo1x_decompress(curr_block, blk_size, out_block, &retsize, NULL); 90 if (retval!=LZO_E_OK) return(-1); 91 return(retsize); 92 } 93 #endif |