code.delx.au - pulseaudio/blob - polyp/tokenizer.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 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   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   General Public License for more details.
  15
  16   You should have received a copy of the GNU General Public License
  17   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 "tokenizer.h"
  31 #include "dynarray.h"
  32 #include "xmalloc.h"
  33
  34 struct pa_tokenizer {
  35     struct pa_dynarray *dynarray;
  36 };
  37
  38 static void token_free(void *p, void *userdata) {
  39     pa_xfree(p);
  40 }
  41
  42 static void parse(struct pa_dynarray*a, const char *s, unsigned args) {
  43     int infty = 0;
  44     const char delimiter[] = " \t\n\r";
  45     const char *p;
  46     assert(a && s);
  47
  48     if (args == 0)
  49         infty = 1;
  50
  51     p = s+strspn(s, delimiter);
  52     while (*p && (infty || args >= 2)) {
  53         size_t l = strcspn(p, delimiter);
  54         char *n = pa_xstrndup(p, l);
  55         pa_dynarray_append(a, n);
  56         p += l;
  57         p += strspn(p, delimiter);
  58         args--;
  59     }
  60
  61     if (args && *p) {
  62         char *n = pa_xstrdup(p);
  63         pa_dynarray_append(a, n);
  64     }
  65 }
  66
  67 struct pa_tokenizer* pa_tokenizer_new(const char *s, unsigned args) {
  68     struct pa_tokenizer *t;
  69
  70     t = pa_xmalloc(sizeof(struct pa_tokenizer));
  71     t->dynarray = pa_dynarray_new();
  72     assert(t->dynarray);
  73
  74     parse(t->dynarray, s, args);
  75     return t;
  76 }
  77
  78 void pa_tokenizer_free(struct pa_tokenizer *t) {
  79     assert(t);
  80     pa_dynarray_free(t->dynarray, token_free, NULL);
  81     pa_xfree(t);
  82 }
  83
  84 const char *pa_tokenizer_get(struct pa_tokenizer *t, unsigned i) {
  85     assert(t);
  86     return pa_dynarray_get(t->dynarray, i);
  87 }