diff options
Diffstat (limited to 'fs/jffs2/comprtest.c')
| -rw-r--r-- | fs/jffs2/comprtest.c | 307 |
1 files changed, 307 insertions, 0 deletions
diff --git a/fs/jffs2/comprtest.c b/fs/jffs2/comprtest.c new file mode 100644 index 00000000000..cf51f091d0e --- /dev/null +++ b/fs/jffs2/comprtest.c @@ -0,0 +1,307 @@ +/* $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] = { + 0x7f, 0x45, 0x4c, 0x46, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x02, 0x00, 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 0x60, 0x83, 0x04, 0x08, 0x34, 0x00, 0x00, 0x00, + 0xb0, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x34, 0x00, 0x20, 0x00, 0x06, 0x00, 0x28, 0x00, + 0x1e, 0x00, 0x1b, 0x00, 0x06, 0x00, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00, 0x34, 0x80, 0x04, 0x08, + 0x34, 0x80, 0x04, 0x08, 0xc0, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00, + 0x04, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0xf4, 0x00, 0x00, 0x00, 0xf4, 0x80, 0x04, 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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; +} |