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/**************************************************************************
**************************************************************************
** **
** arglist.c Argument list functions **
** ========= **
** **
** Purpose: Simplifies handling of argument lists that may **
** appear in argv, and environment variable, or else- **
** where. **
** **
** Author: Garrett D'Amore <garrett@sciences.sdsu.edu> **
** **
** Copyright: 1994, Garrett E. D'Amore **
** **
** NO WARRANTY: This program is provided entirely without warranty. **
** The user assumes full responsibility for the use of **
** this program, and agrees to indemnify the author and **
** the copyright holder from any damage or loss that **
** may result from the use of or inability to use this **
** program. In simple language: YOU USE THIS PROGRAM **
** AT YOUR OWN RISK! **
** **
** Warning: None. **
** **
** Restrictions: None. **
** **
** Algorithm: None. **
** **
** References: None. **
** **
** File formats: None. **
** **
** Rev. History: June 2, 1994 Garrett D'Amore **
** -- Initial coding. **
** **
** Notes: None. **
** **
**************************************************************************
**************************************************************************/
/* >>>>>>>>>> Headers <<<<<<<<<< */
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "arglist.h"
/* >>>>>>>>>> Functions <<<<<<<<<< */
/***************************************
*
* string2arglist Convert a string to an arglist.
*
* Purpose Used to split a string up into an
* argv-like arglist.
*
* Parameters string: the string to convert from
* args: pointer to struct to hold result
*
* Returns zero on success,
* non-zero on error (ENOMEM).
*
*/
int string2arglist (char *string, arglist *args)
{
char *st;
/* clear the arglist to a clean state */
if (args->argv) free (args->argv);
args->argc = 1;
args->alloc = 0;
st = string;
while (1)
{
/* resize array if necessary */
if (args->argc >= args->alloc)
{
if (!(args->argv))
args->argv = (char **) malloc (ARGLISTINC * sizeof (char *));
else
args->argv = (char **) realloc (args->argv,
(args->alloc + ARGLISTINC) * sizeof (char *));
if (args->argv == NULL) return (ENOMEM);
args->alloc += ARGLISTINC;
}
/* get string and set it up, exit loop if not found */
if (!(args->argv [args->argc] = strtok (st, "\t "))) break;
/* needed for additional calls to strtok */
st = NULL;
args->argc++;
}
return 0;
}
/***************************************
*
* argv2arglist Fill an arglist from argv array.
*
* Purpose Converts argv[] array to arglist structure.
*
* Parameters argc: number of entries in argv[]
* argv: argv argument to main()
*
* Returns zero on success,
* nonzero on error (ENOMEM).
*
*/
int argv2arglist (int argc, char *argv[], arglist *args)
{
int i;
/* clear any old memory */
if (args->argv) free (args->argv);
args->argv = (char **) malloc ((argc + 1) * sizeof (char *));
if (!args->argv) return (ENOMEM);
args->alloc = argc;
for (i = 0; i < argc; i++)
{
args->argv[i+1] = argv[i+1];
}
args->argc = argc;
return 0;
}
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