code.delx.au - pulseaudio/blob - src/pulsecore/modargs.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 <ctype.h>
  29 #include <assert.h>
  30 #include <stdlib.h>
  31 #include <string.h>
  32
  33 #include <pulse/xmalloc.h>
  34
  35 #include <pulsecore/hashmap.h>
  36 #include <pulsecore/idxset.h>
  37 #include <pulsecore/sample-util.h>
  38 #include <pulsecore/namereg.h>
  39 #include <pulsecore/sink.h>
  40 #include <pulsecore/source.h>
  41 #include <pulsecore/core-util.h>
  42
  43 #include "modargs.h"
  44
  45 struct entry {
  46     char *key, *value;
  47 };
  48
  49 static int add_key_value(pa_hashmap *map, char *key, char *value, const char* const valid_keys[]) {
  50     struct entry *e;
  51     assert(map && key && value);
  52
  53     if (valid_keys) {
  54         const char*const* v;
  55         for (v = valid_keys; *v; v++)
  56             if (strcmp(*v, key) == 0)
  57                 break;
  58
  59         if (!*v) {
  60             pa_xfree(key);
  61             pa_xfree(value);
  62             return -1;
  63         }
  64     }
  65
  66     e = pa_xmalloc(sizeof(struct entry));
  67     e->key = key;
  68     e->value = value;
  69     pa_hashmap_put(map, key, e);
  70     return 0;
  71 }
  72
  73 pa_modargs *pa_modargs_new(const char *args, const char* const* valid_keys) {
  74     pa_hashmap *map = NULL;
  75
  76     map = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
  77     assert(map);
  78
  79     if (args) {
  80         enum { WHITESPACE, KEY, VALUE_START, VALUE_SIMPLE, VALUE_DOUBLE_QUOTES, VALUE_TICKS } state;
  81         const char *p, *key, *value;
  82         size_t key_len = 0, value_len = 0;
  83
  84         key = value = NULL;
  85         state = WHITESPACE;
  86         for (p = args; *p; p++) {
  87             switch (state) {
  88                 case WHITESPACE:
  89                     if (*p == '=')
  90                         goto fail;
  91                     else if (!isspace(*p)) {
  92                         key = p;
  93                         state = KEY;
  94                         key_len = 1;
  95                     }
  96                     break;
  97                 case KEY:
  98                     if (*p == '=')
  99                         state = VALUE_START;
 100                     else
 101                         key_len++;
 102                     break;
 103                 case  VALUE_START:
 104                     if (*p == '\'') {
 105                         state = VALUE_TICKS;
 106                         value = p+1;
 107                         value_len = 0;
 108                     } else if (*p == '"') {
 109                         state = VALUE_DOUBLE_QUOTES;
 110                         value = p+1;
 111                         value_len = 0;
 112                     } else if (isspace(*p)) {
 113                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(""), valid_keys) < 0)
 114                             goto fail;
 115                         state = WHITESPACE;
 116                     } else {
 117                         state = VALUE_SIMPLE;
 118                         value = p;
 119                         value_len = 1;
 120                     }
 121                     break;
 122                 case VALUE_SIMPLE:
 123                     if (isspace(*p)) {
 124                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 125                             goto fail;
 126                         state = WHITESPACE;
 127                     } else
 128                         value_len++;
 129                     break;
 130                 case VALUE_DOUBLE_QUOTES:
 131                     if (*p == '"') {
 132                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 133                             goto fail;
 134                         state = WHITESPACE;
 135                     } else
 136                         value_len++;
 137                     break;
 138                 case VALUE_TICKS:
 139                     if (*p == '\'') {
 140                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 141                             goto fail;
 142                         state = WHITESPACE;
 143                     } else
 144                         value_len++;
 145                     break;
 146             }
 147         }
 148
 149         if (state == VALUE_START) {
 150             if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(""), valid_keys) < 0)
 151                 goto fail;
 152         } else if (state == VALUE_SIMPLE) {
 153             if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(value), valid_keys) < 0)
 154                 goto fail;
 155         } else if (state != WHITESPACE)
 156             goto fail;
 157     }
 158
 159     return (pa_modargs*) map;
 160
 161 fail:
 162
 163     if (map)
 164         pa_modargs_free((pa_modargs*) map);
 165
 166     return NULL;
 167 }
 168
 169
 170 static void free_func(void *p, PA_GCC_UNUSED void*userdata) {
 171     struct entry *e = p;
 172     assert(e);
 173     pa_xfree(e->key);
 174     pa_xfree(e->value);
 175     pa_xfree(e);
 176 }
 177
 178 void pa_modargs_free(pa_modargs*ma) {
 179     pa_hashmap *map = (pa_hashmap*) ma;
 180     pa_hashmap_free(map, free_func, NULL);
 181 }
 182
 183 const char *pa_modargs_get_value(pa_modargs *ma, const char *key, const char *def) {
 184     pa_hashmap *map = (pa_hashmap*) ma;
 185     struct entry*e;
 186
 187     if (!(e = pa_hashmap_get(map, key)))
 188         return def;
 189
 190     return e->value;
 191 }
 192
 193 int pa_modargs_get_value_u32(pa_modargs *ma, const char *key, uint32_t *value) {
 194     const char *v;
 195     assert(ma && key && value);
 196
 197     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 198         return 0;
 199
 200     if (pa_atou(v, value) < 0)
 201         return -1;
 202
 203     return 0;
 204 }
 205
 206 int pa_modargs_get_value_s32(pa_modargs *ma, const char *key, int32_t *value) {
 207     const char *v;
 208     assert(ma && key && value);
 209
 210     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 211         return 0;
 212
 213     if (pa_atoi(v, value) < 0)
 214         return -1;
 215
 216     return 0;
 217 }
 218
 219 int pa_modargs_get_value_boolean(pa_modargs *ma, const char *key, int *value) {
 220     const char *v;
 221     int r;
 222     assert(ma && key && value);
 223
 224     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 225         return 0;
 226
 227     if (!*v)
 228         return -1;
 229
 230     if ((r = pa_parse_boolean(v)) < 0)
 231         return -1;
 232
 233     *value = r;
 234     return 0;
 235 }
 236
 237 int pa_modargs_get_sample_spec(pa_modargs *ma, pa_sample_spec *rss) {
 238     const char *format;
 239     uint32_t channels;
 240     pa_sample_spec ss;
 241     assert(ma && rss);
 242
 243 /*    DEBUG_TRAP;*/
 244
 245     ss = *rss;
 246     if ((pa_modargs_get_value_u32(ma, "rate", &ss.rate)) < 0)
 247         return -1;
 248
 249     channels = ss.channels;
 250     if ((pa_modargs_get_value_u32(ma, "channels", &channels)) < 0)
 251         return -1;
 252     ss.channels = (uint8_t) channels;
 253
 254     if ((format = pa_modargs_get_value(ma, "format", NULL)))
 255         if ((ss.format = pa_parse_sample_format(format)) < 0)
 256             return -1;
 257
 258     if (!pa_sample_spec_valid(&ss))
 259         return -1;
 260
 261     *rss = ss;
 262
 263     return 0;
 264 }
 265
 266 int pa_modargs_get_channel_map(pa_modargs *ma, pa_channel_map *rmap) {
 267     pa_channel_map map;
 268     const char *cm;
 269
 270     assert(ma);
 271     assert(rmap);
 272
 273     map = *rmap;
 274
 275     if ((cm = pa_modargs_get_value(ma, "channel_map", NULL)))
 276         if (!pa_channel_map_parse(&map, cm))
 277             return -1;
 278
 279     if (!pa_channel_map_valid(&map))
 280         return -1;
 281
 282     *rmap = map;
 283     return 0;
 284 }
 285
 286 int pa_modargs_get_sample_spec_and_channel_map(pa_modargs *ma, pa_sample_spec *rss, pa_channel_map *rmap, pa_channel_map_def_t def) {
 287     pa_sample_spec ss;
 288     pa_channel_map map;
 289
 290     assert(ma);
 291     assert(rss);
 292     assert(rmap);
 293
 294     ss = *rss;
 295
 296     if (pa_modargs_get_sample_spec(ma, &ss) < 0)
 297         return -1;
 298
 299     if (!pa_channel_map_init_auto(&map, ss.channels, def))
 300         map.channels = 0;
 301
 302     if (pa_modargs_get_channel_map(ma, &map) < 0)
 303         return -1;
 304
 305     if (map.channels != ss.channels)
 306         return -1;
 307
 308     *rmap = map;
 309     *rss = ss;
 310
 311     return 0;
 312 }