notwa/crc32
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cleanup

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This commit is contained in:
Connor Olding 2012-08-05 20:19:44 -07:00
parent 4e0f09e57f
commit 7774c55dee
3 changed files with 2 additions and 12 deletions
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3
args.c
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@ -5,9 +5,8 @@
* copy of the license along with this program; see the file LICENSE. * copy of the license along with this program; see the file LICENSE.
*/ */
#include "args.h"
#include <stddef.h> #include <stddef.h>
#include "args.h"
static int argc, argi; static int argc, argi;
static char **argv, *flag; static char **argv, *flag;

10
crc32.c
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@ -8,13 +8,6 @@
typedef unsigned long ulong; typedef unsigned long ulong;
#include "crc32.h" #include "crc32.h"
int crc_big_endian = 0;
ulong crc_polynomial = 0x04C11DB7;
enum {
TABLE_SIZE = 0x100
};
ulong crc_reflect(ulong input) ulong crc_reflect(ulong input)
{ {
ulong reflected = 0; ulong reflected = 0;
@ -27,14 +20,13 @@ ulong crc_reflect(ulong input)
return reflected; return reflected;
} }
/* TODO: test returning array */
void crc_fill_table(ulong *table, int big, ulong polynomial) void crc_fill_table(ulong *table, int big, ulong polynomial)
{ {
ulong lsb = (big) ? 1 << 31 : 1; /* least significant bit */ ulong lsb = (big) ? 1 << 31 : 1; /* least significant bit */
ulong poly = (big) ? polynomial : crc_reflect(polynomial); ulong poly = (big) ? polynomial : crc_reflect(polynomial);
int c, i; int c, i;
for (c = 0; c < TABLE_SIZE; c++, table++) { for (c = 0; c < CRC_TABLE_SIZE; c++, table++) {
*table = (big) ? c << 24 : c; *table = (big) ? c << 24 : c;
for (i = 0; i < 8; i++) { for (i = 0; i < 8; i++) {
if (*table & lsb) { if (*table & lsb) {

1
main.c
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@ -7,7 +7,6 @@
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
#include <string.h>
typedef unsigned long ulong; typedef unsigned long ulong;