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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [fs/] [jffs2/] [comprtest.c] - Blame information for rev 1765

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Line No. Rev Author Line
1 1275 phoenix 
/* $Id: comprtest.c,v 1.1.1.1 2004-04-15 01:11:07 phoenix 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] = {
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42 
#else
43 
#define TESTDATA_LEN 3481
44 
static unsigned char testdata[TESTDATA_LEN] = {
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262 
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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, __u32 cdatalen, __u32 datalen);
270 
unsigned char jffs2_compress(unsigned char *data_in, unsigned char *cpage_out,
271 
                             __u32 *datalen, __u32 *cdatalen);
272 
 
273 
int init_module(void ) {
274 
        unsigned char comprtype;
275 
        __u32 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 
}

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