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428
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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
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5 modify it under the terms of the GNU Library General Public License as
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6 published by the Free Software Foundation; either version 2 of the
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7 License, or (at your 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,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 Library General Public License for more details.
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13
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14 You should have received a copy of the GNU Library General Public
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15 License along with the GNU C Library; see the file COPYING.LIB. If
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16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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17 Cambridge, MA 02139, USA. */
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18
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19 /* Synched up with: Not in FSF. */
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20
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21 # include <config.h>
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22 # ifndef REGISTER /* Strictly enforced in 20.3 */
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23 # define REGISTER
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24 # endif
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25
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26 /* In HPUX 10 the strcat function references memory past the last byte of
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27 the string! This will core dump if the memory following the last byte is
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28 not mapped.
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29
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442
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30 Here is a correct version from, glibc 1.09.
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428
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31 */
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32
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33 char *strcat (char *dest, const char *src);
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34
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35 /* Append SRC on the end of DEST. */
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36 char *
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37 strcat (char *dest, const char *src)
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38 {
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39 REGISTER char *s1 = dest;
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442
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40 REGISTER const char *s2 = src;
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428
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41 char c;
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42
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43 /* Find the end of the string. */
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44 do
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45 c = *s1++;
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46 while (c != '\0');
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47
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48 /* Make S1 point before the next character, so we can increment
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49 it while memory is read (wins on pipelined cpus). */
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50 s1 -= 2;
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51
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52 do
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53 {
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54 c = *s2++;
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55 *++s1 = c;
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56 }
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57 while (c != '\0');
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58
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59 return dest;
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60 }
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