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Add -H option to cksum (hex output), fix to use FLAG macros.

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This commit is contained in:
Rob Landley 2014-02-22 08:02:09 -06:00
parent fa1625d84e
commit 2992a66e2c
1 changed files with 9 additions and 6 deletions
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15
toys/posix/cksum.c
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@ -4,7 +4,7 @@
*
* See http://opengroup.org/onlinepubs/9699919799/utilities/cksum.html
USE_CKSUM(NEWTOY(cksum, "IPLN", TOYFLAG_BIN))
USE_CKSUM(NEWTOY(cksum, "HIPLN", TOYFLAG_BIN))
config CKSUM
bool "cksum"
@ -15,6 +15,7 @@ config CKSUM
For each file, output crc32 checksum value, length and name of file.
If no files listed, copy from stdin. Filename "-" is a synonym for stdin.
-H Hexadecimal checksum (defaults to decimal)
-L Little endian (defaults to big endian)
-P Pre-inversion
-I Skip post-inversion
@ -40,11 +41,11 @@ static unsigned cksum_le(unsigned crc, unsigned char c)
static void do_cksum(int fd, char *name)
{
unsigned crc = (toys.optflags&4) ? 0xffffffff : 0;
unsigned crc = (toys.optflags & FLAG_P) ? 0xffffffff : 0;
uint64_t llen = 0, llen2;
unsigned (*cksum)(unsigned crc, unsigned char c);
cksum = (toys.optflags&2) ? cksum_le : cksum_be;
cksum = (toys.optflags & FLAG_L) ? cksum_le : cksum_be;
// CRC the data
for (;;) {
@ -61,20 +62,22 @@ static void do_cksum(int fd, char *name)
// CRC the length
llen2 = llen;
if (!(toys.optflags&1)) {
if (!(toys.optflags & FLAG_N)) {
while (llen) {
crc = cksum(crc, llen);
llen >>= 8;
}
}
printf("%u %"PRIu64, (toys.optflags&8) ? crc : ~crc, llen2);
printf((toys.optflags & FLAG_H) ? "%x" : "%u",
(toys.optflags & FLAG_I) ? crc : ~crc);
printf(" %"PRIu64, llen2);
if (strcmp("-", name)) printf(" %s", name);
xputc('\n');
}
void cksum_main(void)
{
crc_init(TT.crc_table, toys.optflags&2);
crc_init(TT.crc_table, toys.optflags & FLAG_L);
loopfiles(toys.optargs, do_cksum);
}