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glibc  2.9
argz-next.c
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00001 /* Iterate through the elements of an argz block.
00002    Copyright (C) 1995, 96, 97, 98 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Written by Miles Bader <miles@gnu.org>
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <argz.h>
00022 #include <string.h>
00023 
00024 char *
00025 __argz_next (const char *argz, size_t argz_len, const char *entry)
00026 {
00027   if (entry)
00028     {
00029       if (entry < argz + argz_len)
00030        entry = strchr (entry, '\0') + 1;
00031 
00032       return entry >= argz + argz_len ? NULL : (char *) entry;
00033     }
00034   else
00035     if (argz_len > 0)
00036       return (char *) argz;
00037     else
00038       return NULL;
00039 }
00040 weak_alias (__argz_next, argz_next)