notwa/crc32
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use signed ints for iterating

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Connor Olding 2017-04-24 18:14:02 +00:00
parent accb4a3e26
commit 81a33946da
1 changed files with 7 additions and 5 deletions
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12
main.c
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@ -15,7 +15,7 @@ char buff[BUFFER_SIZE];
#define MAX_INPUTS 256 #define MAX_INPUTS 256
static char *inputs[MAX_INPUTS]; static char *inputs[MAX_INPUTS];
static unsigned int input_n = 0; static int input_n = 0;
static uint32_t starting = 0xFFFFFFFF; static uint32_t starting = 0xFFFFFFFF;
static bool big_endian = 0; static bool big_endian = 0;
@ -126,13 +126,15 @@ cycle_file(FILE *stream)
else else
crc_le_fill_table(table, polynomial); crc_le_fill_table(table, polynomial);
// cast len to int to enable potential signedness optimizations.
// this is safe so long as BUFFER_SIZE can fit in an int.
if (big_endian) do { if (big_endian) do {
size_t len = buff_read(stream); int len = (int) buff_read(stream);
for (size_t i = 0; i < len; i++) for (int i = 0; i < len; i++)
crc_be_cycle(table, &remainder, buff[i]); crc_be_cycle(table, &remainder, buff[i]);
} while (!feof(stream)); else do { } while (!feof(stream)); else do {
size_t len = buff_read(stream); int len = (int) buff_read(stream);
for (size_t i = 0; i < len; i++) for (int i = 0; i < len; i++)
crc_le_cycle(table, &remainder, buff[i]); crc_le_cycle(table, &remainder, buff[i]);
} while (!feof(stream)); } while (!feof(stream));