src/pulsecore/tokenizer.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   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 2.1 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 <stdlib.h>
  28
  29 #include <pulse/xmalloc.h>
  30 #include <pulse/gccmacro.h>
  31
  32 #include <pulsecore/dynarray.h>
  33 #include <pulsecore/macro.h>
  34
  35 #include "tokenizer.h"
  36
  37 static void token_free(void *p, void *userdata) {
  38     pa_xfree(p);
  39 }
  40
  41 static void parse(pa_dynarray*a, const char *s, unsigned args) {
  42     int infty = 0;
  43     const char delimiter[] = " \t\n\r";
  44     const char *p;
  45
  46     pa_assert(a);
  47     pa_assert(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_dynarray *a;
  70
  71     a = pa_dynarray_new();
  72     parse(a, s, args);
  73     return (pa_tokenizer*) a;
  74 }
  75
  76 void pa_tokenizer_free(pa_tokenizer *t) {
  77     pa_dynarray *a = (pa_dynarray*) t;
  78
  79     pa_assert(a);
  80     pa_dynarray_free(a, token_free, NULL);
  81 }
  82
  83 const char *pa_tokenizer_get(pa_tokenizer *t, unsigned i) {
  84     pa_dynarray *a = (pa_dynarray*) t;
  85
  86     pa_assert(a);
  87     return pa_dynarray_get(a, i);
  88 }