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

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <string.h>
  29 #include <stdlib.h>
  30
  31 #include <pulse/xmalloc.h>
  32
  33 #include <pulsecore/dynarray.h>
  34 #include <pulsecore/gccmacro.h>
  35 #include <pulsecore/macro.h>
  36
  37 #include "tokenizer.h"
  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
  48     pa_assert(a);
  49     pa_assert(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_dynarray *a;
  72
  73     a = pa_dynarray_new();
  74     parse(a, s, args);
  75     return (pa_tokenizer*) a;
  76 }
  77
  78 void pa_tokenizer_free(pa_tokenizer *t) {
  79     pa_dynarray *a = (pa_dynarray*) t;
  80
  81     pa_assert(a);
  82     pa_dynarray_free(a, token_free, NULL);
  83 }
  84
  85 const char *pa_tokenizer_get(pa_tokenizer *t, unsigned i) {
  86     pa_dynarray *a = (pa_dynarray*) t;
  87
  88     pa_assert(a);
  89     return pa_dynarray_get(a, i);
  90 }