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use fread for speed

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This commit is contained in:
Connor Olding 2012-08-04 13:14:49 -07:00
parent 29529cd8f2
commit 1847c028fb
1 changed files with 17 additions and 3 deletions
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20
main.c
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@ -20,6 +20,11 @@ typedef unsigned long ulong;
#define FREOPEN_BLANK (NULL)
#endif
#ifndef BUFFER_SIZE
#define BUFFER_SIZE 4096
#endif
char buff[BUFFER_SIZE];
typedef struct string_node_s string_node;
struct string_node_s {
char *s;
@ -123,13 +128,22 @@ static FILE *open_stream(char *filename)
return stream;
}
static ulong cycle_file(FILE *stream)
{
int c;
ulong remainder = starting;
while ((c = getc(stream)) != EOF)
crc_cycle(&remainder, c);
int i, len;
do {
len = fread(buff, 1, BUFFER_SIZE, stream);
if (ferror(stream)) {
perror(NULL);
exit(1);
}
for (i = 0; i < len; i++)
crc_cycle(&remainder, buff[i]);
} while (!feof(stream));
if (xor_output)
remainder ^= 0xFFFFFFFF;