diff options
Diffstat (limited to 'string/strchr.c')
| -rw-r--r-- | string/strchr.c | 19 |
1 files changed, 9 insertions, 10 deletions
diff --git a/string/strchr.c b/string/strchr.c index 5f900750a3..25c2fe4771 100644 --- a/string/strchr.c +++ b/string/strchr.c @@ -1,4 +1,4 @@ -/* Copyright (C) 1991-2015 Free Software Foundation, Inc. +/* Copyright (C) 1991-2016 Free Software Foundation, Inc. This file is part of the GNU C Library. Based on strlen implementation by Torbjorn Granlund (tege@sics.se), with help from Dan Sahlin (dan@sics.se) and @@ -25,9 +25,13 @@ #undef strchr +#ifndef STRCHR +# define STRCHR strchr +#endif + /* Find the first occurrence of C in S. */ char * -strchr (const char *s, int c_in) +STRCHR (const char *s, int c_in) { const unsigned char *char_ptr; const unsigned long int *longword_ptr; @@ -60,13 +64,8 @@ strchr (const char *s, int c_in) The 1-bits make sure that carries propagate to the next 0-bit. The 0-bits provide holes for carries to fall into. */ - switch (sizeof (longword)) - { - case 4: magic_bits = 0x7efefeffL; break; - case 8: magic_bits = ((0x7efefefeL << 16) << 16) | 0xfefefeffL; break; - default: - abort (); - } + magic_bits = -1; + magic_bits = magic_bits / 0xff * 0xfe << 1 >> 1 | 1; /* Set up a longword, each of whose bytes is C. */ charmask = c | (c << 8); @@ -180,7 +179,7 @@ strchr (const char *s, int c_in) } #ifdef weak_alias -#undef index +# undef index weak_alias (strchr, index) #endif libc_hidden_builtin_def (strchr) |