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Fix strnlen change

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This commit is contained in:
Ulrich Drepper
2011-10-23 16:30:40 -04:00
parent fc2ee42abe
commit 2fa2ae85ca
4 changed files with 10 additions and 7 deletions
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10
string/strnlen.c
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@ -27,16 +27,16 @@
/* Find the length of S, but scan at most MAXLEN characters. If no
'\0' terminator is found in that many characters, return MAXLEN. */
#ifndef STRNLEN
# define STRNLEN __strnlen
#ifdef STRNLEN
# define __strnlen STRNLEN
#endif
size_t
STRNLEN (const char *str, size_t maxlen)
__strnlen (const char *str, size_t maxlen)
{
const char *char_ptr, *end_ptr = str + maxlen;
const unsigned long int *longword_ptr;
unsigned long int longword, magic_bits, himagic, lomagic;
unsigned long int longword, himagic, lomagic;
if (maxlen == 0)
return 0;
@ -70,14 +70,12 @@ STRNLEN (const char *str, size_t maxlen)
The 1-bits make sure that carries propagate to the next 0-bit.
The 0-bits provide holes for carries to fall into. */
magic_bits = 0x7efefeffL;
himagic = 0x80808080L;
lomagic = 0x01010101L;
if (sizeof (longword) > 4)
{
/* 64-bit version of the magic. */
/* Do the shift in two steps to avoid a warning if long has 32 bits. */
magic_bits = ((0x7efefefeL << 16) << 16) | 0xfefefeffL;
himagic = ((himagic << 16) << 16) | himagic;
lomagic = ((lomagic << 16) << 16) | lomagic;
}