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linux/fs/jffs2/comprtest.c

308 lines
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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-17 06:20:36 +08:00
/* $Id: comprtest.c,v 1.5 2002/01/03 15:20:44 dwmw2 Exp $ */
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/module.h>
#include <asm/types.h>
#if 0
#define TESTDATA_LEN 512
static unsigned char testdata[TESTDATA_LEN] = {
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#else
#define TESTDATA_LEN 3481
static unsigned char testdata[TESTDATA_LEN] = {
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#endif
static unsigned char comprbuf[TESTDATA_LEN];
static unsigned char decomprbuf[TESTDATA_LEN];
int jffs2_decompress(unsigned char comprtype, unsigned char *cdata_in,
unsigned char *data_out, uint32_t cdatalen, uint32_t datalen);
unsigned char jffs2_compress(unsigned char *data_in, unsigned char *cpage_out,
uint32_t *datalen, uint32_t *cdatalen);
int init_module(void ) {
unsigned char comprtype;
uint32_t c, d;
int ret;
printk("Original data: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
testdata[0],testdata[1],testdata[2],testdata[3],
testdata[4],testdata[5],testdata[6],testdata[7],
testdata[8],testdata[9],testdata[10],testdata[11],
testdata[12],testdata[13],testdata[14],testdata[15]);
d = TESTDATA_LEN;
c = TESTDATA_LEN;
comprtype = jffs2_compress(testdata, comprbuf, &d, &c);
printk("jffs2_compress used compression type %d. Compressed size %d, uncompressed size %d\n",
comprtype, c, d);
printk("Compressed data: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
comprbuf[0],comprbuf[1],comprbuf[2],comprbuf[3],
comprbuf[4],comprbuf[5],comprbuf[6],comprbuf[7],
comprbuf[8],comprbuf[9],comprbuf[10],comprbuf[11],
comprbuf[12],comprbuf[13],comprbuf[14],comprbuf[15]);
ret = jffs2_decompress(comprtype, comprbuf, decomprbuf, c, d);
printk("jffs2_decompress returned %d\n", ret);
printk("Decompressed data: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
decomprbuf[0],decomprbuf[1],decomprbuf[2],decomprbuf[3],
decomprbuf[4],decomprbuf[5],decomprbuf[6],decomprbuf[7],
decomprbuf[8],decomprbuf[9],decomprbuf[10],decomprbuf[11],
decomprbuf[12],decomprbuf[13],decomprbuf[14],decomprbuf[15]);
if (memcmp(decomprbuf, testdata, d))
printk("Compression and decompression corrupted data\n");
else
printk("Compression good for %d bytes\n", d);
return 1;
}