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Rev | Author | Line No. | Line |
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5191 | serge | 1 | /* Implement the strndup function. |
2 | Copyright (C) 2005 Free Software Foundation, Inc. |
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3 | Written by Kaveh R. Ghazi |
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4 | |||
5 | This file is part of the libiberty library. |
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6 | Libiberty is free software; you can redistribute it and/or |
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7 | modify it under the terms of the GNU Library General Public |
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8 | License as published by the Free Software Foundation; either |
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9 | version 2 of the License, or (at your option) any later version. |
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10 | |||
11 | Libiberty is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | Library General Public License for more details. |
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15 | |||
16 | You should have received a copy of the GNU Library General Public |
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17 | License along with libiberty; see the file COPYING.LIB. If |
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18 | not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
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19 | Boston, MA 02110-1301, USA. */ |
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20 | |||
21 | /* |
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22 | |||
23 | @deftypefn Extension char* strndup (const char *@var{s}, size_t @var{n}) |
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24 | |||
25 | Returns a pointer to a copy of @var{s} with at most @var{n} characters |
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26 | in memory obtained from @code{malloc}, or @code{NULL} if insufficient |
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27 | memory was available. The result is always NUL terminated. |
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28 | |||
29 | @end deftypefn |
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30 | |||
31 | */ |
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32 | |||
33 | #include "ansidecl.h" |
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34 | #include |
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35 | |||
36 | extern size_t strlen (const char*); |
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37 | extern PTR malloc (size_t); |
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38 | extern PTR memcpy (PTR, const PTR, size_t); |
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39 | |||
40 | char * |
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41 | strndup (const char *s, size_t n) |
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42 | { |
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43 | char *result; |
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44 | size_t len = strlen (s); |
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45 | |||
46 | if (n < len) |
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47 | len = n; |
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48 | |||
49 | result = (char *) malloc (len + 1); |
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50 | if (!result) |
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51 | return 0; |
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52 | |||
53 | result[len] = '\0'; |
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54 | return (char *) memcpy (result, s, len); |
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55 | }> |