libbb: introduce and use common crc32 routine
function old new delta
crc32_block_endian1 - 37 +37
crc32_block_endian0 - 34 +34
global_crc32_table - 8 +8
file_read 82 87 +5
gzip_main 211 214 +3
xz_crc32 40 35 -5
crc32_table 8 - -8
calculate_gunzip_crc 54 34 -20
lzo_crc32 54 25 -29
cksum_main 298 211 -87
------------------------------------------------------------------------------
(add/remove: 3/1 grow/shrink: 2/4 up/down: 87/-149) Total: -62 bytes
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/coreutils/cksum.c b/coreutils/cksum.c
index 7bf383e..7a37e6a 100644
--- a/coreutils/cksum.c
+++ b/coreutils/cksum.c
@@ -18,7 +18,6 @@
off_t length, filesize;
int bytes_read;
int exit_code = EXIT_SUCCESS;
- uint8_t *cp;
#if ENABLE_DESKTOP
getopt32(argv, ""); /* coreutils 6.9 compat */
@@ -39,11 +38,7 @@
#define read_buf bb_common_bufsiz1
while ((bytes_read = safe_read(fd, read_buf, sizeof(read_buf))) > 0) {
- cp = (uint8_t *) read_buf;
- length += bytes_read;
- do {
- crc = (crc << 8) ^ crc32_table[(crc >> 24) ^ *cp++];
- } while (--bytes_read);
+ crc = crc32_block_endian1(crc, read_buf, bytes_read, crc32_table);
}
close(fd);