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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 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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428
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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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428
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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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428
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16
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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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23
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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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27
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442
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28 Here is a correct version from, glibc 1.09.
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428
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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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442
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38 REGISTER const char *s2 = src;
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428
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39 char c;
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40
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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 }
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