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| author | DJ Delorie <dj@redhat.com> | 2009-07-25 11:28:20 +0000 |
|---|---|---|
| committer | DJ Delorie <dj@redhat.com> | 2009-07-25 11:28:20 +0000 |
| commit | bdc0e08dbcf16b52410ce016ab9ed036a32e7e2d (patch) | |
| tree | 1076d6f0bcbea3b111ff97d6e630f9b62beef32e /libiberty | |
| parent | 6e88169156860fb7a726b875af919cade2c940b5 (diff) | |
| download | gdb-bdc0e08dbcf16b52410ce016ab9ed036a32e7e2d.zip gdb-bdc0e08dbcf16b52410ce016ab9ed036a32e7e2d.tar.gz gdb-bdc0e08dbcf16b52410ce016ab9ed036a32e7e2d.tar.bz2 | |
merge from gcc
Diffstat (limited to 'libiberty')
| -rw-r--r-- | libiberty/ChangeLog | 5 | ||||
| -rw-r--r-- | libiberty/crc32.c | 15 |
2 files changed, 19 insertions, 1 deletions
diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog index 516a90d..6033935 100644 --- a/libiberty/ChangeLog +++ b/libiberty/ChangeLog @@ -1,5 +1,10 @@ 2009-07-24 Ian Lance Taylor <iant@google.com> + PR bootstrap/40854 + * crc32.c (xcrc32): Rename from crc32. + +2009-07-24 Ian Lance Taylor <iant@google.com> + * crc32.c: New file. * Makefile.in: Rebuild dependencies. (CFILES): Add crc32.c. diff --git a/libiberty/crc32.c b/libiberty/crc32.c index 2171a3d..c12916b 100644 --- a/libiberty/crc32.c +++ b/libiberty/crc32.c @@ -150,12 +150,25 @@ protocol for the @samp{qCRC} command. In order to get the same results as gdb for a block of data, you must pass the first CRC parameter as @code{0xffffffff}. +This CRC can be specified as: + + Width : 32 + Poly : 0x04c11db7 + Init : parameter, typically 0xffffffff + RefIn : false + RefOut : false + XorOut : 0 + +This differs from the "standard" CRC-32 algorithm in that the values +are not reflected, and there is no final XOR value. These differences +make it easy to compose the values of multiple blocks. + @end deftypefn */ unsigned int -crc32 (const unsigned char *buf, int len, unsigned int init) +xcrc32 (const unsigned char *buf, int len, unsigned int init) { unsigned int crc = init; while (len--) |