diff options
Diffstat (limited to 'libbb/unzip.c')
| -rw-r--r-- | libbb/unzip.c | 16 |
1 files changed, 5 insertions, 11 deletions
diff --git a/libbb/unzip.c b/libbb/unzip.c index 69cc819..c28ca83 100644 --- a/libbb/unzip.c +++ b/libbb/unzip.c @@ -123,22 +123,16 @@ static void abort_gzip(void) static void make_crc_table(void) { - unsigned long table_entry; /* crc shift register */ - unsigned long poly = 0; /* polynomial exclusive-or pattern */ - int i; /* counter for all possible eight bit values */ - int k; /* byte being shifted into crc apparatus */ - - /* terms of polynomial defining this crc (except x^32): */ - static int p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26}; + const unsigned long poly = 0xedb88320; /* polynomial exclusive-or pattern */ + unsigned short i; /* counter for all possible eight bit values */ crc_table = (unsigned long *) malloc(256 * sizeof(unsigned long)); - /* Make exclusive-or pattern from polynomial (0xedb88320) */ - for (i = 0; i < sizeof(p)/sizeof(int); i++) - poly |= 1L << (31 - p[i]); - /* Compute and print table of CRC's, five per line */ for (i = 0; i < 256; i++) { + unsigned long table_entry; /* crc shift register */ + char k; /* byte being shifted into crc apparatus */ + table_entry = i; /* The idea to initialize the register with the byte instead of * zero was stolen from Haruhiko Okumura's ar002 |