code.delx.au - pulseaudio/blob - src/pulsecore/tokenizer.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio 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   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; 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 <pulse/xmalloc.h>
  31
  32 #include <pulsecore/dynarray.h>
  33 #include <pulsecore/gccmacro.h>
  34
  35 #include "tokenizer.h"
  36
  37 struct pa_tokenizer {
  38     pa_dynarray *dynarray;
  39 };
  40
  41 static void token_free(void *p, PA_GCC_UNUSED void *userdata) {
  42     pa_xfree(p);
  43 }
  44
  45 static void parse(pa_dynarray*a, const char *s, unsigned args) {
  46     int infty = 0;
  47     const char delimiter[] = " \t\n\r";
  48     const char *p;
  49     assert(a && s);
  50
  51     if (args == 0)
  52         infty = 1;
  53
  54     p = s+strspn(s, delimiter);
  55     while (*p && (infty || args >= 2)) {
  56         size_t l = strcspn(p, delimiter);
  57         char *n = pa_xstrndup(p, l);
  58         pa_dynarray_append(a, n);
  59         p += l;
  60         p += strspn(p, delimiter);
  61         args--;
  62     }
  63
  64     if (args && *p) {
  65         char *n = pa_xstrdup(p);
  66         pa_dynarray_append(a, n);
  67     }
  68 }
  69
  70 pa_tokenizer* pa_tokenizer_new(const char *s, unsigned args) {
  71     pa_tokenizer *t;
  72
  73     t = pa_xmalloc(sizeof(pa_tokenizer));
  74     t->dynarray = pa_dynarray_new();
  75     assert(t->dynarray);
  76
  77     parse(t->dynarray, s, args);
  78     return t;
  79 }
  80
  81 void pa_tokenizer_free(pa_tokenizer *t) {
  82     assert(t);
  83     pa_dynarray_free(t->dynarray, token_free, NULL);
  84     pa_xfree(t);
  85 }
  86
  87 const char *pa_tokenizer_get(pa_tokenizer *t, unsigned i) {
  88     assert(t);
  89     return pa_dynarray_get(t->dynarray, i);
  90 }