Mercurial > hg > octave-nkf > gnulib-hg
changeset 209:f6c94599f020
.
author | Jim Meyering <jim@meyering.net> |
---|---|
date | Mon, 25 Apr 1994 17:01:36 +0000 |
parents | bbe47cd94702 |
children | 86dd264f716f |
files | lib/memchr.c |
diffstat | 1 files changed, 12 insertions(+), 7 deletions(-) [+] |
line wrap: on
line diff
--- a/lib/memchr.c +++ b/lib/memchr.c @@ -31,6 +31,12 @@ #endif #endif +#if (SIZEOF_LONG != 4 && SIZEOF_LONG != 8) + error This function works only on systems for which sizeof(long) is 4 or 8. +/* The previous line would begin with `#error,' but some compilers can't + handle that even when the condition is false. */ +#endif + /* Search no more than N bytes of S for C. */ char * @@ -67,19 +73,18 @@ The 1-bits make sure that carries propagate to the next 0-bit. The 0-bits provide holes for carries to fall into. */ -#ifdef LONG_64_BITS - /* 64-bit version of the magic. */ +#if (SIZEOF_LONG == 8) magic_bits = ((unsigned long int) 0x7efefefe << 32) | 0xfefefeff; #else magic_bits = 0x7efefeff; -#endif /* LONG_64_BITS */ +#endif /* SIZEOF_LONG == 8 */ /* Set up a longword, each of whose bytes is C. */ charmask = c | (c << 8); charmask |= charmask << 16; -#ifdef LONG_64_BITS +#if (SIZEOF_LONG == 8) charmask |= charmask << 32; -#endif /* LONG_64_BITS */ +#endif /* SIZEOF_LONG == 8 */ if (sizeof (longword) > 8) abort (); @@ -149,7 +154,7 @@ return (char *) &cp[2]; if (cp[3] == c) return (char *) &cp[3]; -#ifdef LONG_64_BITS +#if (SIZEOF_LONG == 8) if (cp[4] == c) return (char *) &cp[4]; if (cp[5] == c) @@ -158,7 +163,7 @@ return (char *) &cp[6]; if (cp[7] == c) return (char *) &cp[7]; -#endif /* LONG_64_BITS */ +#endif /* SIZEOF_LONG == 8 */ } n -= sizeof (longword);