code.delx.au - pulseaudio/blob - src/polypcore/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 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   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 Lesser 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 #include "gccmacro.h"
  34
  35 struct pa_tokenizer {
  36     pa_dynarray *dynarray;
  37 };
  38
  39 static void token_free(void *p, PA_GCC_UNUSED void *userdata) {
  40     pa_xfree(p);
  41 }
  42
  43 static void parse(pa_dynarray*a, const char *s, unsigned args) {
  44     int infty = 0;
  45     const char delimiter[] = " \t\n\r";
  46     const char *p;
  47     assert(a && s);
  48
  49     if (args == 0)
  50         infty = 1;
  51
  52     p = s+strspn(s, delimiter);
  53     while (*p && (infty || args >= 2)) {
  54         size_t l = strcspn(p, delimiter);
  55         char *n = pa_xstrndup(p, l);
  56         pa_dynarray_append(a, n);
  57         p += l;
  58         p += strspn(p, delimiter);
  59         args--;
  60     }
  61
  62     if (args && *p) {
  63         char *n = pa_xstrdup(p);
  64         pa_dynarray_append(a, n);
  65     }
  66 }
  67
  68 pa_tokenizer* pa_tokenizer_new(const char *s, unsigned args) {
  69     pa_tokenizer *t;
  70
  71     t = pa_xmalloc(sizeof(pa_tokenizer));
  72     t->dynarray = pa_dynarray_new();
  73     assert(t->dynarray);
  74
  75     parse(t->dynarray, s, args);
  76     return t;
  77 }
  78
  79 void pa_tokenizer_free(pa_tokenizer *t) {
  80     assert(t);
  81     pa_dynarray_free(t->dynarray, token_free, NULL);
  82     pa_xfree(t);
  83 }
  84
  85 const char *pa_tokenizer_get(pa_tokenizer *t, unsigned i) {
  86     assert(t);
  87     return pa_dynarray_get(t->dynarray, i);
  88 }