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/* $XFree86$ */
/*
* Copyright 2002-2003 Red Hat Inc., Durham, North Carolina.
*
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation on the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NON-INFRINGEMENT. IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
/*
* Authors:
* Rickard E. (Rik) Faith <faith@redhat.com>
*
*/
/** \file
* Generic comma-delimited argument processing. */
#define DMX_ARG_TEST 0
#include "dmx.h"
#include "dmxarg.h"
#include <stdio.h>
#include <string.h>
#if DMX_ARG_TEST
#include <stdlib.h>
#endif
/** Stores the parsed argument list. */
struct _dmxArg {
int argc; /**< Number of arguments in argv */
int argm; /**< Maximum number of arguments store-able in argv */
const char **argv; /**< Arguments */
};
/** Create an (externally opaque) \a dmxArg object. */
dmxArg dmxArgCreate(void)
{
dmxArg a = malloc(sizeof(*a));
a->argc = 0;
a->argm = 2;
a->argv = malloc(a->argm * sizeof(*a->argv));
a->argv[0] = NULL;
return a;
}
/** Free the specified \a dmxArg object. */
void dmxArgFree(dmxArg a)
{
int i;
for (i = 0; i < a->argc; i++) free((char *)a->argv[i]);
free(a->argv);
free(a);
}
/** Add the \a string as the next argument in the \a dmxArg object. */
void dmxArgAdd(dmxArg a, const char *string)
{
if (a->argm <= a->argc + 2)
a->argv = realloc(a->argv, sizeof(*a->argv) * (a->argm *= 2));
a->argv[a->argc++] = strdup(string);
a->argv[a->argc] = NULL;
}
/** Return the argument number \a item in the \a dmxArg object.
* Arguments are 0 based. NULL will be returned for values less than 0
* or equal to or greater than the number of arguments in the object. */
const char *dmxArgV(dmxArg a, int item)
{
if (item < 0 || item >= a->argc) return NULL;
return a->argv[item];
}
/** Return the number of arguments in the \a dmxArg object. */
int dmxArgC(dmxArg a)
{
return a->argc;
}
/** Parse a string into arguments delimited by commas. Return a new \a
* dmxArg object containing the arguments. */
dmxArg dmxArgParse(const char *string)
{
char *tmp;
char *start, *pt;
dmxArg a = dmxArgCreate();
int done;
int len;
if (!string) return a;
len = strlen(string) + 2;
tmp = malloc(len);
strncpy(tmp, string, len);
for (start = pt = tmp, done = 0; !done && *pt; start = ++pt) {
for (;*pt && *pt != ','; pt++);
if (!*pt) done = 1;
*pt = '\0';
dmxArgAdd(a, start);
}
if (!done) dmxArgAdd(a, ""); /* Final comma */
free(tmp);
return a;
}
#if DMX_ARG_TEST
static void dmxArgPrint(dmxArg a)
{
int i;
printf(" argc = %d\n", dmxArgC(a));
for (i = 0; i < dmxArgC(a); i++)
printf(" argv[%d] = \"%s\"\n", i, dmxArgV(a, i));
}
static void dmxArgTest(const char *string)
{
dmxArg a;
if (!string)
printf("Testing NULL\n");
else if (!strlen(string))
printf("Testing (empty)\n");
else
printf("Testing \"%s\"\n", string);
a = dmxArgParse(string);
dmxArgPrint(a);
dmxArgFree(a);
}
int main(void)
{
dmxArgTest(NULL);
dmxArgTest("");
dmxArgTest(",");
dmxArgTest("a");
dmxArgTest("a,");
dmxArgTest(",a");
dmxArgTest("a,b");
dmxArgTest("a,b,");
dmxArgTest("a,b,,");
dmxArgTest("a,b,,c");
return 0;
}
#endif
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