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/* ply-array.c - linked array implementation
*
* Copyright (C) 2008 Red Hat, 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., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written by: Ray Strode <rstrode@redhat.com>
*/
#include "config.h"
#include "ply-array.h"
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "ply-buffer.h"
static const void *null_terminator = NULL;
struct _ply_array
{
ply_buffer_t *buffer;
};
ply_array_t *
ply_array_new (void)
{
ply_array_t *array;
array = calloc (1, sizeof (ply_array_t));
array->buffer = ply_buffer_new ();
ply_buffer_append_bytes (array->buffer, &null_terminator, sizeof (const void *));
return array;
}
void
ply_array_free (ply_array_t *array)
{
if (array == NULL)
return;
ply_buffer_free (array->buffer);
free (array);
}
int
ply_array_get_size (ply_array_t *array)
{
int size;
size = (ply_buffer_get_size (array->buffer) / sizeof (const void *)) - 1;
return size;
}
void
ply_array_add_element (ply_array_t *array,
const void *data)
{
/* Temporarily remove NULL terminator
*/
ply_buffer_remove_bytes_at_end (array->buffer, sizeof (const void *));
ply_buffer_append_bytes (array->buffer, &data, sizeof (const void *));
/* Add NULL terminator back
*/
ply_buffer_append_bytes (array->buffer, &null_terminator, sizeof (const void *));
}
void * const *
ply_array_get_elements (ply_array_t *array)
{
return (void * const *) ply_buffer_get_bytes (array->buffer);
}
void **
ply_array_steal_elements (ply_array_t *array)
{
void **data;
data = (void **) ply_buffer_steal_bytes (array->buffer);
ply_buffer_append_bytes (array->buffer, &null_terminator, sizeof (const void *));
return data;
}
#ifdef PLY_ARRAY_ENABLE_TEST
#include <stdio.h>
int
main (int argc,
char **argv)
{
ply_array_t *array;
int i;
char **data;
array = ply_array_new ();
ply_array_add_element (array, "foo");
ply_array_add_element (array, "bar");
ply_array_add_element (array, "baz");
ply_array_add_element (array, "qux");
data = (char **) ply_array_get_elements (array);
for (i = 0; data[i] != NULL; i++)
{
printf ("element '%d' has data '%s'\n", i, data[i]);
i++;
}
ply_array_free (array);
return 0;
}
#endif
/* vim: set ts=4 sw=4 expandtab autoindent cindent cino={.5s,(0: */
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