argcv.c
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/* argcv.c - simple functions for parsing input based on whitespace
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "argcv.h"
/*
* takes a string and splits it into several strings, breaking at ' '
* command is the string to split
* the number of strings is placed into argc
* the split strings are put into argv
* returns 0 on success, nonzero on failure
*/
int
argcv_get (const char *command, int *argc, char ***argv)
{
int len = strlen (command);
int i = 0, j = 0;
int start = 0;
if (len < 1)
return 1;
*argc = 1;
for (i = 0; i < len; i++)
if (command[i] == ' ')
(*argc)++;
*argv = calloc ((*argc + 1), sizeof (char *));
for (i = 0; i <= len; i++)
{
if (command[i] == ' ' || command[i] == '\0')
{
/* Reserve space for the null. */
(*argv)[j] = calloc ((i - start + 1), sizeof (char));
if ((*argv)[j] == NULL)
return 1;
strncpy ((*argv)[j], &command[start], i - start);
j++;
start = i+1;
}
}
return 0;
}
/*
* frees all elements of an argv array
* argc is the number of elements
* argv is the array
*/
int
argcv_free (int argc, char **argv)
{
while (--argc >= 0)
if (argv[argc])
free (argv[argc]);
free (argv);
return 1;
}
/* Take a argv an make string separated by ' '. */
int
argcv_string (int argc, char **argv, char **pstring)
{
int i;
size_t len;
char *buffer;
/* No need. */
if (pstring == NULL)
return 1;
buffer = malloc (1);
if (buffer == NULL)
return 1;
*buffer = '\0';
for (len = i = 0; i < argc; i++)
{
len += strlen (argv[i]) + 2;
buffer = realloc (buffer, len);
if (buffer == NULL)
return 1;
if (i != 0)
strcat (buffer, " ");
strcat (buffer, argv[i]);
}
/* Strip off trailing space. */
if (*buffer != '\0')
{
while (buffer[strlen (buffer) - 1] == ' ')
{
buffer[strlen (buffer) - 1] = '\0';
}
}
if (pstring)
*pstring = buffer;
return 0;
}