mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-10-31 22:25:33 -04:00
fa19d6ab7e
add some more consts to idxset add module-sine, a sine generating sink_input module git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@165 fefdeb5f-60dc-0310-8127-8f9354f1896f
390 lines
8.9 KiB
C
390 lines
8.9 KiB
C
/* $Id$ */
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/***
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This file is part of polypaudio.
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polypaudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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polypaudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with polypaudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <stdio.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include "idxset.h"
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#include "xmalloc.h"
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struct idxset_entry {
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void *data;
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uint32_t index;
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unsigned hash_value;
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struct idxset_entry *hash_prev, *hash_next;
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struct idxset_entry* iterate_prev, *iterate_next;
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};
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struct pa_idxset {
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unsigned (*hash_func) (const void *p);
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int (*compare_func)(const void *a, const void *b);
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unsigned hash_table_size, n_entries;
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struct idxset_entry **hash_table, **array, *iterate_list_head, *iterate_list_tail;
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uint32_t index, start_index, array_size;
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};
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unsigned pa_idxset_string_hash_func(const void *p) {
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unsigned hash = 0;
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const char *c;
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for (c = p; *c; c++)
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hash = 31 * hash + *c;
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return hash;
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}
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int pa_idxset_string_compare_func(const void *a, const void *b) {
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return strcmp(a, b);
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}
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unsigned pa_idxset_trivial_hash_func(const void *p) {
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return (unsigned) p;
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}
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int pa_idxset_trivial_compare_func(const void *a, const void *b) {
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return a != b;
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}
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struct pa_idxset* pa_idxset_new(unsigned (*hash_func) (const void *p), int (*compare_func) (const void*a, const void*b)) {
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struct pa_idxset *s;
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s = pa_xmalloc(sizeof(struct pa_idxset));
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s->hash_func = hash_func ? hash_func : pa_idxset_trivial_hash_func;
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s->compare_func = compare_func ? compare_func : pa_idxset_trivial_compare_func;
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s->hash_table_size = 1023;
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s->hash_table = pa_xmalloc0(sizeof(struct idxset_entry*)*s->hash_table_size);
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s->array = NULL;
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s->array_size = 0;
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s->index = 0;
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s->start_index = 0;
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s->n_entries = 0;
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s->iterate_list_head = s->iterate_list_tail = NULL;
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return s;
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}
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void pa_idxset_free(struct pa_idxset *s, void (*free_func) (void *p, void *userdata), void *userdata) {
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assert(s);
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while (s->iterate_list_head) {
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struct idxset_entry *e = s->iterate_list_head;
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s->iterate_list_head = s->iterate_list_head->iterate_next;
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if (free_func)
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free_func(e->data, userdata);
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pa_xfree(e);
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}
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pa_xfree(s->hash_table);
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pa_xfree(s->array);
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pa_xfree(s);
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}
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static struct idxset_entry* hash_scan(struct pa_idxset *s, struct idxset_entry* e, const void *p) {
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assert(p);
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assert(s->compare_func);
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for (; e; e = e->hash_next)
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if (s->compare_func(e->data, p) == 0)
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return e;
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return NULL;
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}
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static void extend_array(struct pa_idxset *s, uint32_t index) {
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uint32_t i, j, l;
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struct idxset_entry** n;
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assert(index >= s->start_index);
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if (index < s->start_index + s->array_size)
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return;
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for (i = 0; i < s->array_size; i++)
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if (s->array[i])
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break;
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l = index - s->start_index - i + 100;
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n = pa_xmalloc0(sizeof(struct hash_table_entry*)*l);
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for (j = 0; j < s->array_size-i; j++)
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n[j] = s->array[i+j];
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pa_xfree(s->array);
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s->array = n;
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s->array_size = l;
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s->start_index += i;
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}
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static struct idxset_entry** array_index(struct pa_idxset*s, uint32_t index) {
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if (index >= s->start_index + s->array_size)
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return NULL;
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if (index < s->start_index)
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return NULL;
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return s->array + (index - s->start_index);
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}
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int pa_idxset_put(struct pa_idxset*s, void *p, uint32_t *index) {
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unsigned h;
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struct idxset_entry *e, **a;
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assert(s && p);
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assert(s->hash_func);
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h = s->hash_func(p) % s->hash_table_size;
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assert(s->hash_table);
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if ((e = hash_scan(s, s->hash_table[h], p))) {
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if (index)
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*index = e->index;
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return -1;
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}
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e = pa_xmalloc(sizeof(struct idxset_entry));
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e->data = p;
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e->index = s->index++;
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e->hash_value = h;
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/* Insert into hash table */
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e->hash_next = s->hash_table[h];
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e->hash_prev = NULL;
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if (s->hash_table[h])
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s->hash_table[h]->hash_prev = e;
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s->hash_table[h] = e;
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/* Insert into array */
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extend_array(s, e->index);
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a = array_index(s, e->index);
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assert(a && !*a);
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*a = e;
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/* Insert into linked list */
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e->iterate_next = NULL;
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e->iterate_prev = s->iterate_list_tail;
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if (s->iterate_list_tail) {
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assert(s->iterate_list_head);
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s->iterate_list_tail->iterate_next = e;
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} else {
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assert(!s->iterate_list_head);
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s->iterate_list_head = e;
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}
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s->iterate_list_tail = e;
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s->n_entries++;
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assert(s->n_entries >= 1);
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if (index)
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*index = e->index;
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return 0;
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}
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void* pa_idxset_get_by_index(struct pa_idxset*s, uint32_t index) {
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struct idxset_entry **a;
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assert(s);
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if (!(a = array_index(s, index)))
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return NULL;
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if (!*a)
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return NULL;
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return (*a)->data;
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}
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void* pa_idxset_get_by_data(struct pa_idxset*s, const void *p, uint32_t *index) {
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unsigned h;
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struct idxset_entry *e;
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assert(s && p);
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assert(s->hash_func);
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h = s->hash_func(p) % s->hash_table_size;
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assert(s->hash_table);
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if (!(e = hash_scan(s, s->hash_table[h], p)))
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return NULL;
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if (index)
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*index = e->index;
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return e->data;
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}
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static void remove_entry(struct pa_idxset *s, struct idxset_entry *e) {
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struct idxset_entry **a;
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assert(s && e);
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/* Remove from array */
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a = array_index(s, e->index);
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assert(a && *a && *a == e);
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*a = NULL;
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/* Remove from linked list */
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if (e->iterate_next)
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e->iterate_next->iterate_prev = e->iterate_prev;
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else
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s->iterate_list_tail = e->iterate_prev;
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if (e->iterate_prev)
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e->iterate_prev->iterate_next = e->iterate_next;
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else
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s->iterate_list_head = e->iterate_next;
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/* Remove from hash table */
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if (e->hash_next)
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e->hash_next->hash_prev = e->hash_prev;
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if (e->hash_prev)
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e->hash_prev->hash_next = e->hash_next;
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else
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s->hash_table[e->hash_value] = e->hash_next;
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pa_xfree(e);
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assert(s->n_entries >= 1);
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s->n_entries--;
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}
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void* pa_idxset_remove_by_index(struct pa_idxset*s, uint32_t index) {
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struct idxset_entry **a;
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void *data;
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assert(s);
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if (!(a = array_index(s, index)))
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return NULL;
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data = (*a)->data;
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remove_entry(s, *a);
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return data;
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}
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void* pa_idxset_remove_by_data(struct pa_idxset*s, const void *data, uint32_t *index) {
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struct idxset_entry *e;
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unsigned h;
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void *r;
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assert(s->hash_func);
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h = s->hash_func(data) % s->hash_table_size;
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assert(s->hash_table);
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if (!(e = hash_scan(s, s->hash_table[h], data)))
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return NULL;
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r = e->data;
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if (index)
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*index = e->index;
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remove_entry(s, e);
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return r;
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}
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void* pa_idxset_rrobin(struct pa_idxset *s, uint32_t *index) {
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struct idxset_entry **a, *e = NULL;
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assert(s && index);
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if ((a = array_index(s, *index)) && *a)
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e = (*a)->iterate_next;
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if (!e)
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e = s->iterate_list_head;
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if (!e)
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return NULL;
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*index = e->index;
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return e->data;
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}
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void* pa_idxset_first(struct pa_idxset *s, uint32_t *index) {
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assert(s);
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if (!s->iterate_list_head)
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return NULL;
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if (index)
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*index = s->iterate_list_head->index;
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return s->iterate_list_head->data;
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}
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void *pa_idxset_next(struct pa_idxset *s, uint32_t *index) {
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struct idxset_entry **a, *e = NULL;
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assert(s && index);
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if ((a = array_index(s, *index)) && *a)
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e = (*a)->iterate_next;
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if (e) {
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*index = e->index;
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return e->data;
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} else {
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*index = PA_IDXSET_INVALID;
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return NULL;
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}
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}
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int pa_idxset_foreach(struct pa_idxset*s, int (*func)(void *p, uint32_t index, int *del, void*userdata), void *userdata) {
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struct idxset_entry *e;
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assert(s && func);
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e = s->iterate_list_head;
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while (e) {
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int del = 0, r;
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struct idxset_entry *n = e->iterate_next;
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r = func(e->data, e->index, &del, userdata);
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if (del)
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remove_entry(s, e);
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if (r < 0)
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return r;
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e = n;
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}
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return 0;
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}
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unsigned pa_idxset_ncontents(struct pa_idxset*s) {
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assert(s);
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return s->n_entries;
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}
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int pa_idxset_isempty(struct pa_idxset *s) {
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assert(s);
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return s->n_entries == 0;
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}
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