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ridgeio_array.c
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ridgeio_array.c
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/*
* Surrey Space Centre ridge tools for SAR data processing
* Copyright (C) 2011 Peter Brett <p.brett@surrey.ac.uk>
*
* 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 3 of the License, 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "ridgeio.h"
void
rio_array_init (RioArray *array, size_t elem_size, uint32_t capacity)
{
array->len = 0;
array->capacity = capacity;
array->size = elem_size;
array->contents = NULL;
if (capacity) {
array->contents = realloc (array->contents, capacity * elem_size);
}
}
void *
rio_array_add_i (RioArray *array)
{
if (array->len >= array->capacity) {
uint32_t new_cap = array->capacity ? (array->capacity << 1) : 1;
void *ptr = realloc (array->contents, new_cap * array->size);
assert (ptr);
array->capacity = new_cap;
array->contents = ptr;
}
return (void *) ((char *) array->contents
+ (array->size * array->len++));
}
void rio_array_clear (RioArray *array)
{
array->len = 0;
array->capacity = 0;
free (array->contents);
array->contents = NULL;
}
void
rio_array_remove (RioArray *array, int index) {
if (index > array->len) return;
void *tgt = (void *) ((char *) array->contents
+ (array->size * index));
void *last = (void *) ((char *) array->contents
+ (array->size * (array->len - 1)));
memcpy (tgt, last, array->size);
array->len--;
}