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gcc/libiberty/strndup.c
Gabriel Dos Reis d7cf8390c7 libiberty.h (ACONCAT): Properly cast value of alloca().
include/
2005-05-24  Gabriel Dos Reis  <gdr@integrable-solutions.net>

	* libiberty.h (ACONCAT): Properly cast value of alloca().

	* ansidecl.h (ATTRIBUTE_UNUSED_LABEL): Don't define if
	__cplusplus.

libiberty/
2005-05-24  Gabriel Dos Reis  <gdr@integrable-solutions.net>

	* configure.ac: Check declarations for calloc(), getenv(),
	malloc(), realloc() and sbrk().
	* config.in: Regenerate.
	* configure: Likewise.

	* alloca.c (C_alloca): Change "new" to "new_storage".  Use XNEWVEC
	instead of xmalloc.
	* choose-temp.c (choose_temp_base): Use XNEWVEC instea od xmalloc.
	* concat.c (liiberty_concat_ptr): Surround definition with an
	extern "C" block, if __cplusplus.
	(concat): Use XNEWVEC instead of xmalloc.
	(reconcat): Likewise.
	* cp-demangle.c (struct d_print_template): Rename member
	"template" to "template_decl".  Adjust use throughout the file.
	(d_print_resize): Properly cast return value of realloc().
	(cplus_demangle_print): Same for malloc().
	(d_demangle): Likewise.
	* cp-demint.c (cplus_demangle_fill_builtin_type): Rename parameter
	"typename" to "type_name".
	* cplus-dem.c (grow_vect): Use XRESIZEVEC instead of xrealloc().
	(work_stuff_copy_to_from): Use XNEWVEC insteand of xmalloc().
	(demangle_template_value_parm): Likewise.
	(demangle_template): Likewise.
	(recursively_demangle): Likewise.
	(do_hpacc_template_literal): Likewise.
	(do_arg): Likewise.
	(remember_type): Likewise.
	(remember_Ktype): Likewise.
	(register_Btype): Likewise.
	(string_need): Use XRESIZEVEC instead of xrealloc().
	* dyn-string.c (dyn_string_init): Use XNEWVEC.
	(dyn_string_new): Use XNEW.
	(dyn_string_resize): Use XRESIZEVEC.
	* fnmatch.c (fnmatch): Rename local variable "not" to "negate".
	* getopt.c (getenv): Declare only if !__cplusplus and !getenv.
	Otherwise include <stdlib.h>.
	(exchange): Cast return value of malloc().
	* hashtab.c (htab_size): Define as both macro and non-inline
	function.
	(htab_elements): Likewise.
	* getpwd.c (getpwd): Use XNEWVEC.
	(htab_create_alloc_ex): Use C90 prototype-style.
	* lrealpath.c (lrealpath): Appropriately cast return value of
	malloc().
	* make-relative-prefix.c (save_string): Likewise.
	* make-temp-file.c (try_dir): Rename from "try".  Adjust use in
	the file.
	(choose_tmpdir): Use XNEWVEC.
	* mkstemps.c (mkstemps): Rename parameter "template" to "pattern".
	* pex-common.c (pex_init_common): Use XNEW.
	(pex_add_remove): Use XRESIZEVEC.
	(pex_run): Likewise.
	(pex_get_status_and_time): Likewise.
	* pex-djgpp.c (pex_djgpp_exec_child): Likewise.
	* pex-msdos.c (pex_init): Use XNEW.
	(pex_msdos_exec_child): Likewise.
	(pex_msdos_exec_child): Use XRESIZEVEC.
	* pex-unix.c (pex_wait): Use XNEW.
	* pex-win32.c (fix_argv): Use XNEWVEC.
	* pexecute.c (pwait): Likewise.
	* setenv.c (setenv): Properly cast return value of malloc().
	* sigsetmask.c (sigsetmask): Rename local variables "old" and
	"new" to "old_sig" and "new_sig".
	* sort.c (main): Use XNEWVEC.
	* spaces.c (spaces): Cast return value of malloc().
	* strndup.c (strndup): Likewise.
	* ternary.c (ternary_insert): Use XNEW.
	* xmalloc.c (malloc, realloc, calloc, sbrk): Surround declaration
	with an extern "C" block if __cplusplus.
	* xstrdup.c (xstrdup): Cast return value of memcpy().
	* xstrerror.c (strerror): Enclose declaration in an extern "C"
	block if __cplusplus.
	* xstrndup.c (xstrndup): Use XNEW. Cast return value of memcpy().

From-SVN: r100115
2005-05-24 20:48:25 +00:00

56 lines
1.6 KiB
C

/* 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);
}