1/* $Id: comprtest.c,v 1.1.1.1 2008/10/15 03:27:07 james26_jang Exp $ */ 2 3#include <linux/kernel.h> 4#include <linux/string.h> 5#include <linux/module.h> 6#include <asm/types.h> 7#define TESTDATA_LEN 3481 8static unsigned char testdata[TESTDATA_LEN] = { 9 0x23, 0x69, 0x6e, 0x63, 0x6c, 0x75, 0x64, 0x65, 0x20, 0x22, 0x64, 0x62, 0x65, 0x6e, 0x63, 0x68, 10 0x2e, 0x68, 0x22, 0x0a, 0x0a, 0x23, 0x64, 0x65, 0x66, 0x69, 0x6e, 0x65, 0x20, 0x4d, 0x41, 0x58, 11 0x5f, 0x46, 0x49, 0x4c, 0x45, 0x53, 0x20, 0x31, 0x30, 0x30, 0x30, 0x0a, 0x0a, 0x73, 0x74, 0x61, 12 0x74, 0x69, 0x63, 0x20, 0x63, 0x68, 0x61, 0x72, 0x20, 0x62, 0x75, 0x66, 0x5b, 0x37, 0x30, 0x30, 13 0x30, 0x30, 0x5d, 0x3b, 0x0a, 0x65, 0x78, 0x74, 0x65, 0x72, 0x6e, 0x20, 0x69, 0x6e, 0x74, 0x20, 14 0x6c, 0x69, 0x6e, 0x65, 0x5f, 0x63, 0x6f, 0x75, 0x6e, 0x74, 0x3b, 0x0a, 0x0a, 0x73, 0x74, 0x61, 15 0x74, 0x69, 0x63, 0x20, 0x73, 0x74, 0x72, 0x75, 0x63, 0x74, 0x20, 0x7b, 0x0a, 0x09, 0x69, 0x6e, 16 0x74, 0x20, 0x66, 0x64, 0x3b, 0x0a, 0x09, 0x69, 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comprbuf[TESTDATA_LEN]; 229static unsigned char decomprbuf[TESTDATA_LEN]; 230 231int jffs2_decompress(unsigned char comprtype, unsigned char *cdata_in, 232 unsigned char *data_out, __u32 cdatalen, __u32 datalen); 233unsigned char jffs2_compress(unsigned char *data_in, unsigned char *cpage_out, 234 __u32 *datalen, __u32 *cdatalen); 235 236int init_module(void ) { 237 unsigned char comprtype; 238 __u32 c, d; 239 int ret; 240 241 printk("Original data: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 242 testdata[0],testdata[1],testdata[2],testdata[3], 243 testdata[4],testdata[5],testdata[6],testdata[7], 244 testdata[8],testdata[9],testdata[10],testdata[11], 245 testdata[12],testdata[13],testdata[14],testdata[15]); 246 d = TESTDATA_LEN; 247 c = TESTDATA_LEN; 248 comprtype = jffs2_compress(testdata, comprbuf, &d, &c); 249 250 printk("jffs2_compress used compression type %d. Compressed size %d, uncompressed size %d\n", 251 comprtype, c, d); 252 printk("Compressed data: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 253 comprbuf[0],comprbuf[1],comprbuf[2],comprbuf[3], 254 comprbuf[4],comprbuf[5],comprbuf[6],comprbuf[7], 255 comprbuf[8],comprbuf[9],comprbuf[10],comprbuf[11], 256 comprbuf[12],comprbuf[13],comprbuf[14],comprbuf[15]); 257 258 ret = jffs2_decompress(comprtype, comprbuf, decomprbuf, c, d); 259 printk("jffs2_decompress returned %d\n", ret); 260 printk("Decompressed data: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 261 decomprbuf[0],decomprbuf[1],decomprbuf[2],decomprbuf[3], 262 decomprbuf[4],decomprbuf[5],decomprbuf[6],decomprbuf[7], 263 decomprbuf[8],decomprbuf[9],decomprbuf[10],decomprbuf[11], 264 decomprbuf[12],decomprbuf[13],decomprbuf[14],decomprbuf[15]); 265 if (memcmp(decomprbuf, testdata, d)) 266 printk("Compression and decompression corrupted data\n"); 267 else 268 printk("Compression good for %d bytes\n", d); 269 return 1; 270} 271