fs/jffs2/comprtest.c

   1 /* $Id: comprtest.c,v 1.5 2002/01/03 15:20:44 dwmw2 Exp $ */
   2
   3 #include <linux/kernel.h>
   4 #include <linux/string.h>
   5 #include <linux/module.h>
   6 #include <asm/types.h>
   7 #if 0
   8 #define TESTDATA_LEN 512
   9 static unsigned char testdata[TESTDATA_LEN] = {
  10  0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  11  0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x60, 0x83, 0x04, 0x08, 0x34, 0x00, 0x00, 0x00,
  12  0xb0, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x34, 0x00, 0x20, 0x00, 0x06, 0x00, 0x28, 0x00,
  13  0x1e, 0x00, 0x1b, 0x00, 0x06, 0x00, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00, 0x34, 0x80, 0x04, 0x08,
  14  0x34, 0x80, 0x04, 0x08, 0xc0, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00,
  15  0x04, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0xf4, 0x00, 0x00, 0x00, 0xf4, 0x80, 0x04, 0x08,
  16  0xf4, 0x80, 0x04, 0x08, 0x13, 0x00, 0x00, 0x00, 0x13, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
  17  0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x04, 0x08,
  18  0x00, 0x80, 0x04, 0x08, 0x0d, 0x05, 0x00, 0x00, 0x0d, 0x05, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00,
  19  0x00, 0x10, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x10, 0x05, 0x00, 0x00, 0x10, 0x95, 0x04, 0x08,
  20  0x10, 0x95, 0x04, 0x08, 0xe8, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00,
  21  0x00, 0x10, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x58, 0x05, 0x00, 0x00, 0x58, 0x95, 0x04, 0x08,
  22  0x58, 0x95, 0x04, 0x08, 0xa0, 0x00, 0x00, 0x00, 0xa0, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00,
  23  0x04, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x08, 0x01, 0x00, 0x00, 0x08, 0x81, 0x04, 0x08,
  24  0x08, 0x81, 0x04, 0x08, 0x20, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
  25  0x04, 0x00, 0x00, 0x00, 0x2f, 0x6c, 0x69, 0x62, 0x2f, 0x6c, 0x64, 0x2d, 0x6c, 0x69, 0x6e, 0x75,
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  29  0x07, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  30  0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  31  0x04, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
  32  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x69, 0x00, 0x00, 0x00,
  33  0x0c, 0x83, 0x04, 0x08, 0x81, 0x00, 0x00, 0x00, 0x22, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00,
  34  0x1c, 0x83, 0x04, 0x08, 0xac, 0x00, 0x00, 0x00, 0x22, 0x00, 0x00, 0x00, 0x57, 0x00, 0x00, 0x00,
  35  0x2c, 0x83, 0x04, 0x08, 0xdd, 0x00, 0x00, 0x00, 0x12, 0x00, 0x00, 0x00, 0x1a, 0x00, 0x00, 0x00,
  36  0x3c, 0x83, 0x04, 0x08, 0x2e, 0x00, 0x00, 0x00, 0x12, 0x00, 0x00, 0x00, 0x21, 0x00, 0x00, 0x00,
  37  0x4c, 0x83, 0x04, 0x08, 0x7d, 0x00, 0x00, 0x00, 0x22, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00,
  38  0x00, 0x85, 0x04, 0x08, 0x04, 0x00, 0x00, 0x00, 0x11, 0x00, 0x0e, 0x00, 0x01, 0x00, 0x00, 0x00,
  39  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x5f, 0x5f, 0x67,
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  42 #else
  43 #define TESTDATA_LEN 3481
  44 static unsigned char testdata[TESTDATA_LEN] = {
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 261  0x69, 0x7a, 0x65, 0x29, 0x3b, 0x0a, 0x09, 0x64, 0x6f, 0x5f, 0x63, 0x6c, 0x6f, 0x73, 0x65, 0x28,
 262  0x35, 0x30, 0x30, 0x30, 0x29, 0x3b, 0x0a, 0x7d, 0x0a
 263 };
 264 #endif
 265 static unsigned char comprbuf[TESTDATA_LEN];
 266 static unsigned char decomprbuf[TESTDATA_LEN];
 267
 268 int jffs2_decompress(unsigned char comprtype, unsigned char *cdata_in,
 269                      unsigned char *data_out, uint32_t cdatalen, uint32_t datalen);
 270 unsigned char jffs2_compress(unsigned char *data_in, unsigned char *cpage_out,
 271                              uint32_t *datalen, uint32_t *cdatalen);
 272
 273 int init_module(void ) {
 274         unsigned char comprtype;
 275         uint32_t c, d;
 276         int ret;
 277
 278         printk("Original data: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
 279                testdata[0],testdata[1],testdata[2],testdata[3],
 280                testdata[4],testdata[5],testdata[6],testdata[7],
 281                testdata[8],testdata[9],testdata[10],testdata[11],
 282                testdata[12],testdata[13],testdata[14],testdata[15]);
 283         d = TESTDATA_LEN;
 284         c = TESTDATA_LEN;
 285         comprtype = jffs2_compress(testdata, comprbuf, &d, &c);
 286
 287         printk("jffs2_compress used compression type %d. Compressed size %d, uncompressed size %d\n",
 288                comprtype, c, d);
 289         printk("Compressed data: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
 290                comprbuf[0],comprbuf[1],comprbuf[2],comprbuf[3],
 291                comprbuf[4],comprbuf[5],comprbuf[6],comprbuf[7],
 292                comprbuf[8],comprbuf[9],comprbuf[10],comprbuf[11],
 293                comprbuf[12],comprbuf[13],comprbuf[14],comprbuf[15]);
 294
 295         ret = jffs2_decompress(comprtype, comprbuf, decomprbuf, c, d);
 296         printk("jffs2_decompress returned %d\n", ret);
 297         printk("Decompressed data:  %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
 298                decomprbuf[0],decomprbuf[1],decomprbuf[2],decomprbuf[3],
 299                decomprbuf[4],decomprbuf[5],decomprbuf[6],decomprbuf[7],
 300                decomprbuf[8],decomprbuf[9],decomprbuf[10],decomprbuf[11],
 301                decomprbuf[12],decomprbuf[13],decomprbuf[14],decomprbuf[15]);
 302         if (memcmp(decomprbuf, testdata, d))
 303                 printk("Compression and decompression corrupted data\n");
 304         else
 305                 printk("Compression good for %d bytes\n", d);
 306         return 1;
 307 }