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/* ALSA Card Profile
*
* Copyright © 2020 Wim Taymans
*
* 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
* 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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#ifndef PA_IDXSET_H
#define PA_IDXSET_H
#ifdef __cplusplus
extern "C" {
#endif
#include "array.h"
#define PA_IDXSET_INVALID ((uint32_t) -1)
typedef unsigned (*pa_hash_func_t)(const void *p);
typedef int (*pa_compare_func_t)(const void *a, const void *b);
typedef struct pa_idxset_item {
void *ptr;
} pa_idxset_item;
typedef struct pa_idxset {
pa_array array;
pa_hash_func_t hash_func;
pa_compare_func_t compare_func;
} pa_idxset;
static inline unsigned pa_idxset_trivial_hash_func(const void *p)
{
return PA_PTR_TO_UINT(p);
}
static inline int pa_idxset_trivial_compare_func(const void *a, const void *b)
{
return a < b ? -1 : (a > b ? 1 : 0);
}
static inline unsigned pa_idxset_string_hash_func(const void *p)
{
unsigned hash = 0;
const char *c;
for (c = p; *c; c++)
hash = 31 * hash + (unsigned) *c;
return hash;
}
static inline int pa_idxset_string_compare_func(const void *a, const void *b)
{
return strcmp(a, b);
}
static inline pa_idxset *pa_idxset_new(pa_hash_func_t hash_func, pa_compare_func_t compare_func)
{
pa_idxset *s = calloc(1, sizeof(pa_idxset));
pa_array_init(&s->array, 16);
s->hash_func = hash_func;
s->compare_func = compare_func;
return s;
}
static inline void pa_idxset_free(pa_idxset *s, pa_free_cb_t free_cb)
{
if (free_cb) {
pa_idxset_item *item;
pa_array_for_each(item, &s->array)
free_cb(item->ptr);
}
pa_array_clear(&s->array);
free(s);
}
static inline pa_idxset_item* pa_idxset_find(const pa_idxset *s, const void *ptr)
{
pa_idxset_item *item;
pa_array_for_each(item, &s->array) {
if (item->ptr == ptr)
return item;
}
return NULL;
}
static inline int pa_idxset_put(pa_idxset*s, void *p, uint32_t *idx)
{
pa_idxset_item *item = pa_idxset_find(s, p);
int res = item ? -1 : 0;
if (item == NULL) {
item = pa_idxset_find(s, NULL);
if (item == NULL)
item = pa_array_add(&s->array, sizeof(*item));
item->ptr = p;
}
if (idx)
*idx = item - (pa_idxset_item*)s->array.data;
return res;
}
static inline pa_idxset *pa_idxset_copy(pa_idxset *s, pa_copy_func_t copy_func)
{
pa_idxset_item *item;
pa_idxset *copy = pa_idxset_new(s->hash_func, s->compare_func);
pa_array_for_each(item, &s->array) {
if (item->ptr)
pa_idxset_put(copy, copy_func ? copy_func(item->ptr) : item->ptr, NULL);
}
return copy;
}
static inline bool pa_idxset_isempty(const pa_idxset *s)
{
pa_idxset_item *item;
pa_array_for_each(item, &s->array)
if (item->ptr != NULL)
return false;
return true;
}
static inline unsigned pa_idxset_size(pa_idxset*s)
{
unsigned count = 0;
pa_idxset_item *item;
pa_array_for_each(item, &s->array)
if (item->ptr != NULL)
count++;
return count;
}
static inline void *pa_idxset_search(pa_idxset *s, uint32_t *idx)
{
pa_idxset_item *item;
for (item = pa_array_get_unchecked(&s->array, *idx, pa_idxset_item);
pa_array_check(&s->array, item); item++, (*idx)++) {
if (item->ptr != NULL)
return item->ptr;
}
*idx = PA_IDXSET_INVALID;
return NULL;
}
static inline void *pa_idxset_next(pa_idxset *s, uint32_t *idx)
{
(*idx)++;;
return pa_idxset_search(s, idx);
}
static inline void* pa_idxset_first(pa_idxset *s, uint32_t *idx)
{
uint32_t i = 0;
void *ptr = pa_idxset_search(s, &i);
if (idx)
*idx = i;
return ptr;
}
static inline void* pa_idxset_get_by_data(pa_idxset*s, const void *p, uint32_t *idx)
{
pa_idxset_item *item = pa_idxset_find(s, p);
if (item == NULL)
return NULL;
if (idx)
*idx = item - (pa_idxset_item*)s->array.data;
return item->ptr;
}
static inline void* pa_idxset_get_by_index(pa_idxset*s, uint32_t idx)
{
pa_idxset_item *item;
if (!pa_array_check_index(&s->array, idx, pa_idxset_item))
return NULL;
item = pa_array_get_unchecked(&s->array, idx, pa_idxset_item);
return item->ptr;
}
#define PA_IDXSET_FOREACH(e, s, idx) \
for ((e) = pa_idxset_first((s), &(idx)); (e); (e) = pa_idxset_next((s), &(idx)))
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* PA_IDXSET_H */
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