diff options
Diffstat (limited to 'drivers/staging/cxt1e1/sbecrc.c')
| -rw-r--r-- | drivers/staging/cxt1e1/sbecrc.c | 105 |
1 files changed, 50 insertions, 55 deletions
diff --git a/drivers/staging/cxt1e1/sbecrc.c b/drivers/staging/cxt1e1/sbecrc.c index 3f3cd60ac367..87512a53f720 100644 --- a/drivers/staging/cxt1e1/sbecrc.c +++ b/drivers/staging/cxt1e1/sbecrc.c @@ -44,25 +44,23 @@ static u_int32_t CRCTable[CRC_TABLE_ENTRIES]; ***************************************************************************/ static void -genCrcTable (u_int32_t *CRCTable) +genCrcTable(u_int32_t *CRCTable) { - int ii, jj; - u_int32_t crc; - - for (ii = 0; ii < CRC_TABLE_ENTRIES; ii++) - { - crc = ii; - for (jj = 8; jj > 0; jj--) - { - if (crc & 1) - crc = (crc >> 1) ^ CRC32_POLYNOMIAL; - else - crc >>= 1; - } - CRCTable[ii] = crc; - } - - crcTableInit++; + int ii, jj; + u_int32_t crc; + + for (ii = 0; ii < CRC_TABLE_ENTRIES; ii++) { + crc = ii; + for (jj = 8; jj > 0; jj--) { + if (crc & 1) + crc = (crc >> 1) ^ CRC32_POLYNOMIAL; + else + crc >>= 1; + } + CRCTable[ii] = crc; + } + + crcTableInit++; } @@ -85,52 +83,49 @@ genCrcTable (u_int32_t *CRCTable) */ void -sbeCrc (u_int8_t *buffer, /* data buffer to crc */ - u_int32_t count, /* length of block in bytes */ - u_int32_t initialCrc, /* starting CRC */ - u_int32_t *result) +sbeCrc(u_int8_t *buffer, /* data buffer to crc */ + u_int32_t count, /* length of block in bytes */ + u_int32_t initialCrc, /* starting CRC */ + u_int32_t *result) { - u_int32_t *tbl = 0; - u_int32_t temp1, temp2, crc; - - /* - * if table not yet created, do so. Don't care about "extra" time - * checking this every time sbeCrc() is called, since CRC calculations are - * already time consuming - */ - if (!crcTableInit) - { + u_int32_t *tbl = 0; + u_int32_t temp1, temp2, crc; + + /* + * if table not yet created, do so. Don't care about "extra" time + * checking this every time sbeCrc() is called, since CRC calculations + * are already time consuming + */ + if (!crcTableInit) { #ifdef STATIC_CRC_TABLE - tbl = &CRCTable; - genCrcTable (tbl); + tbl = &CRCTable; + genCrcTable(tbl); #else - tbl = (u_int32_t *) OS_kmalloc (CRC_TABLE_ENTRIES * sizeof (u_int32_t)); - if (tbl == 0) - { - *result = 0; /* dummy up return value due to malloc - * failure */ - return; - } - genCrcTable (tbl); + tbl = (u_int32_t *) OS_kmalloc(CRC_TABLE_ENTRIES * sizeof(u_int32_t)); + if (tbl == 0) { + *result = 0; /* dummy up return value due to malloc + * failure */ + return; + } + genCrcTable(tbl); #endif - } - /* inverting bits makes ZMODEM & PKZIP compatible */ - crc = initialCrc ^ 0xFFFFFFFFL; + } + /* inverting bits makes ZMODEM & PKZIP compatible */ + crc = initialCrc ^ 0xFFFFFFFFL; - while (count-- != 0) - { - temp1 = (crc >> 8) & 0x00FFFFFFL; - temp2 = tbl[((int) crc ^ *buffer++) & 0xff]; - crc = temp1 ^ temp2; - } + while (count-- != 0) { + temp1 = (crc >> 8) & 0x00FFFFFFL; + temp2 = tbl[((int) crc ^ *buffer++) & 0xff]; + crc = temp1 ^ temp2; + } - crc ^= 0xFFFFFFFFL; + crc ^= 0xFFFFFFFFL; - *result = crc; + *result = crc; #ifndef STATIC_CRC_TABLE - crcTableInit = 0; - OS_kfree (tbl); + crcTableInit = 0; + OS_kfree(tbl); #endif } |