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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libiberty/strndup.c | |
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Diffstat (limited to 'libiberty/strndup.c')
-rw-r--r-- | libiberty/strndup.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/libiberty/strndup.c b/libiberty/strndup.c new file mode 100644 index 000000000..9e9b4e299 --- /dev/null +++ b/libiberty/strndup.c @@ -0,0 +1,55 @@ +/* Implement the strndup function. + Copyright (C) 2005 Free Software Foundation, Inc. + Written by Kaveh R. Ghazi <ghazi@caip.rutgers.edu>. + +This file is part of the libiberty library. +Libiberty is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public +License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +Libiberty 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 +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with libiberty; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, +Boston, MA 02110-1301, USA. */ + +/* + +@deftypefn Extension char* strndup (const char *@var{s}, size_t @var{n}) + +Returns a pointer to a copy of @var{s} with at most @var{n} characters +in memory obtained from @code{malloc}, or @code{NULL} if insufficient +memory was available. The result is always NUL terminated. + +@end deftypefn + +*/ + +#include "ansidecl.h" +#include <stddef.h> + +extern size_t strlen (const char*); +extern PTR malloc (size_t); +extern PTR memcpy (PTR, const PTR, size_t); + +char * +strndup (const char *s, size_t n) +{ + char *result; + size_t len = strlen (s); + + if (n < len) + len = n; + + result = (char *) malloc (len + 1); + if (!result) + return 0; + + result[len] = '\0'; + return (char *) memcpy (result, s, len); +} |