code.delx.au - pulseaudio/blob - polyp/dynarray.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, or (at your option) any later version.
  10
  11   polypaudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with polypaudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <string.h>
  27 #include <assert.h>
  28 #include <stdlib.h>
  29
  30 #include "dynarray.h"
  31 #include "xmalloc.h"
  32
  33 struct pa_dynarray {
  34     void **data;
  35     unsigned n_allocated, n_entries;
  36 };
  37
  38 struct pa_dynarray* pa_dynarray_new(void) {
  39     struct pa_dynarray *a;
  40     a = pa_xmalloc(sizeof(struct pa_dynarray));
  41     a->data = NULL;
  42     a->n_entries = 0;
  43     a->n_allocated = 0;
  44     return a;
  45 }
  46
  47 void pa_dynarray_free(struct pa_dynarray* a, void (*func)(void *p, void *userdata), void *userdata) {
  48     unsigned i;
  49     assert(a);
  50
  51     if (func)
  52         for (i = 0; i < a->n_entries; i++)
  53             if (a->data[i])
  54                 func(a->data[i], userdata);
  55
  56     pa_xfree(a->data);
  57     pa_xfree(a);
  58 }
  59
  60 void pa_dynarray_put(struct pa_dynarray*a, unsigned i, void *p) {
  61     assert(a);
  62
  63     if (i >= a->n_allocated) {
  64         unsigned n;
  65
  66         if (!p)
  67             return;
  68
  69         n = i+100;
  70         a->data = pa_xrealloc(a->data, sizeof(void*)*n);
  71         memset(a->data+a->n_allocated, 0, sizeof(void*)*(n-a->n_allocated));
  72         a->n_allocated = n;
  73     }
  74
  75     a->data[i] = p;
  76
  77     if (i >= a->n_entries)
  78         a->n_entries = i+1;
  79 }
  80
  81 unsigned pa_dynarray_append(struct pa_dynarray*a, void *p) {
  82     unsigned i = a->n_entries;
  83     pa_dynarray_put(a, i, p);
  84     return i;
  85 }
  86
  87 void *pa_dynarray_get(struct pa_dynarray*a, unsigned i) {
  88     assert(a);
  89     if (i >= a->n_allocated)
  90         return NULL;
  91     assert(a->data);
  92     return a->data[i];
  93 }
  94
  95 unsigned pa_dynarray_ncontents(struct pa_dynarray*a) {
  96     assert(a);
  97     return a->n_entries;
  98 }