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glibc  2.9
argz-delete.c
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00001 /* Routines for dealing with '\0' separated arg vectors.
00002    Copyright (C) 1995,96,97,2002 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 #include <stdlib.h>
00024 
00025 /* Delete ENTRY from ARGZ & ARGZ_LEN, if any.  */
00026 void
00027 argz_delete (char **argz, size_t *argz_len, char *entry)
00028 {
00029   if (entry)
00030     /* Get rid of the old value for NAME.  */
00031     {
00032       size_t entry_len = strlen (entry) + 1;
00033       *argz_len -= entry_len;
00034       memmove (entry, entry + entry_len, *argz_len - (entry - *argz));
00035       if (*argz_len == 0)
00036        {
00037          free (*argz);
00038          *argz = 0;
00039        }
00040     }
00041 }
00042 libc_hidden_def (argz_delete)