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Tweak the documentation of libiberty's xcrc32 function

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libiberty/ChangeLog;

	* crc32.c: In the documentation, don't refer to GDB's
	now-nonexistent crc32 implementation.  In the table-generation
	program embedded within the documentation, change the type of
	the induction variables i and j from int to unsigned int, to
	avoid undefined behavior.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231983 138bc75d-0d04-0410-961f-82ee72b054a4
This commit is contained in:
ppalka 2015-12-28 22:00:14 +00:00
parent aafde35e46
commit 2afaef0360
2 changed files with 13 additions and 7 deletions
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8
libiberty/ChangeLog
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@ -1,3 +1,11 @@
2015-12-28 Patrick Palka <ppalka@gcc.gnu.org>
* crc32.c: In the documentation, don't refer to GDB's
now-nonexistent crc32 implementation. In the table-generation
program embedded within the documentation, change the type of
the induction variables i and j from int to unsigned int, to
avoid undefined behavior.
2015-12-21 Nick Clifton <nickc@redhat.com>
PR 66827

12
libiberty/crc32.c
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@ -33,15 +33,14 @@
#include "libiberty.h"
/* This table was generated by the following program. This matches
what gdb does.
/* This table was generated by the following program.
#include <stdio.h>
int
main ()
{
int i, j;
unsigned int i, j;
unsigned int c;
int table[256];
@ -146,10 +145,9 @@ starting value is @var{init}; this may be used to compute the CRC of
data split across multiple buffers by passing the return value of each
call as the @var{init} parameter of the next.
This is intended to match the CRC used by the @command{gdb} remote
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 is used by the @command{gdb} remote 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: