Mercurial > hg > xemacs-beta
view src/strcmp.c @ 4319:74d00c7cc134
Specify coding-system-for-write, add a coding cookie in #'write-abbrev-file.
2007-12-09 Aidan Kehoe <kehoea@parhasard.net>
* abbrev.el (write-abbrev-file):
Write FILE using escape-quoted, as a coding system. Add a coding
cookie to specify exactly what coding system was used
(escape-quoted is aliased to binary on non-Mule). Thank you for
the bug report, Uwe Brauer.
This bug would have been resolved ages ago if we had merged
Dave Love's 2002 changes from GNU. Nope, I didn't merge the whole
file when doing this.
author | Aidan Kehoe <kehoea@parhasard.net> |
---|---|
date | Sun, 09 Dec 2007 18:31:41 +0100 |
parents | abe6d1db359e |
children |
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/* This file is part of XEmacs. XEmacs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. XEmacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with XEmacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Synched up with: Not in FSF. */ /* In SunOS 4.1.1 the strcmp and strncmp functions reference memory past the last byte of the string! This will core dump if the memory following the last byte is not mapped. Here are correct versions by hbs@lucid.com. */ # include <config.h> # ifndef REGISTER /* Strictly enforced in 20.3 */ # define REGISTER # endif #include <string.h> #define ALIGNED(x) (!(((unsigned long) (x)) & (sizeof (unsigned long) - 1))) #define MAGIC 0x7efefeff #define HIGH_BIT_P(c) ((c) & hi_bit) #define HAS_ZERO(c) (((((c) + magic) ^ (c)) & not_magic) != not_magic) int strcmp (const char *x, const char *y) { if (x == y) return 0; else if (ALIGNED (x) && ALIGNED (y)) { const unsigned long *x1 = (const unsigned long *) x; const unsigned long *y1 = (const unsigned long *) y; unsigned long c; unsigned long magic = MAGIC; unsigned long not_magic = ~magic; unsigned long hi_bit = 0x80000000; while ((c = *x1) == *y1) { if (HAS_ZERO(c)) { if (!HIGH_BIT_P (c)) return 0; else { x = (const char *) x1; y = (const char *) y1; goto slow_loop; } } x1++; y1++; } x = (const char *) x1; y = (const char *) y1; goto slow_loop; } else { char c; slow_loop: while ((c = *x) == *y) { if (c == (char) 0) return 0; x++; y++; } return (*x - *y); } } int strncmp (const char *x, const char *y, size_t n) { if ((x == y) || (n <= 0)) return 0; else if (ALIGNED (x) && ALIGNED (y)) { const unsigned long *x1 = (const unsigned long *) x; const unsigned long *y1 = (const unsigned long *) y; unsigned long c; unsigned long magic = MAGIC; unsigned long not_magic = ~magic; unsigned long hi_bit = 0x80000000; while ((c = *x1) == *y1) { n -= sizeof (unsigned long); if (n <= 0) return 0; if (HAS_ZERO(c)) { if (!HIGH_BIT_P (c)) return 0; else { x = (const char *) x1; y = (const char *) y1; goto slow_loop; } } x1++; y1++; } x = (const char *) x1; y = (const char *) y1; goto slow_loop; } else { char c; slow_loop: while ((c = *x) == *y) { n--; if (n <= 0) return 0; if (c == (char) 0) return 0; x++; y++; } return (*x - *y); } }