annotate src/strcat.c @ 5659:e63bb7b22c8f

Add compiler macros for #'equal, #'member, ... where #'eq, #'memq appropriate. lisp/ChangeLog addition: 2012-05-07 Aidan Kehoe <kehoea@parhasard.net> * cl-macs.el: * cl-macs.el (cl-non-fixnum-number-p): Rename, to cl-non-immediate-number-p. This is a little more informative as a name, though still not ideal, in that it will give t for some immediate fixnums on 64-bit builds. * cl-macs.el (eql): * cl-macs.el (define-star-compiler-macros): * cl-macs.el (delq): * cl-macs.el (remq): Use the new name. * cl-macs.el (cl-equal-equivalent-to-eq-p): New. * cl-macs.el (cl-car-or-pi): New. * cl-macs.el (cl-cdr-or-pi): New. * cl-macs.el (equal): New compiler macro. * cl-macs.el (member): New compiler macro. * cl-macs.el (assoc): New compiler macro. * cl-macs.el (rassoc): New compiler macro. If any of #'equal, #'member, #'assoc or #'rassoc has a constant argument such that #'eq, #'memq, #'assq or #'rassq, respectively, are equivalent, make the substitution. Relevant in files like ispell.el, there's a reasonable amount of code out there that doesn't quite get the distinction.
author Aidan Kehoe <kehoea@parhasard.net>
date Mon, 07 May 2012 17:56:24 +0100
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children
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1 /* Copyright (C) 1991 Free Software Foundation, Inc.
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2 This file is part of the GNU C Library.
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3
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4 The GNU C Library is free software: you can redistribute it and/or modify it
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5 under the terms of the GNU General Public License as published by the
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6 Free Software Foundation, either version 3 of the License, or (at your
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7 option) any later version.
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8
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9 The GNU C Library is distributed in the hope that it will be useful, but WITHOUT
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10 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with the GNU C Library. If not, see <http://www.gnu.org/licenses/>. */
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17 /* Synched up with: Not in FSF. */
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18
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19 # include <config.h>
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20 # ifndef REGISTER /* Strictly enforced in 20.3 */
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21 # define REGISTER
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22 # endif
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24 /* In HPUX 10 the strcat function references memory past the last byte of
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25 the string! This will core dump if the memory following the last byte is
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26 not mapped.
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28 Here is a correct version from, glibc 1.09.
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29 */
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30
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31 char *strcat (char *dest, const char *src);
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32
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33 /* Append SRC on the end of DEST. */
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34 char *
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35 strcat (char *dest, const char *src)
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36 {
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37 REGISTER char *s1 = dest;
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38 REGISTER const char *s2 = src;
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39 char c;
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41 /* Find the end of the string. */
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42 do
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43 c = *s1++;
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44 while (c != '\0');
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45
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46 /* Make S1 point before the next character, so we can increment
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47 it while memory is read (wins on pipelined cpus). */
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48 s1 -= 2;
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49
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50 do
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51 {
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52 c = *s2++;
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53 *++s1 = c;
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54 }
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55 while (c != '\0');
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56
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57 return dest;
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58 }