code.delx.au - pulseaudio/blob - src/pulsecore/modargs.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 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 <ctype.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include <pulse/xmalloc.h>
  31
  32 #include <pulsecore/hashmap.h>
  33 #include <pulsecore/idxset.h>
  34 #include <pulsecore/sample-util.h>
  35 #include <pulsecore/namereg.h>
  36 #include <pulsecore/sink.h>
  37 #include <pulsecore/source.h>
  38 #include <pulsecore/core-util.h>
  39 #include <pulsecore/macro.h>
  40
  41 #include "modargs.h"
  42
  43 struct entry {
  44     char *key, *value;
  45 };
  46
  47 static int add_key_value(pa_hashmap *map, char *key, char *value, const char* const valid_keys[]) {
  48     struct entry *e;
  49
  50     pa_assert(map);
  51     pa_assert(key);
  52     pa_assert(value);
  53
  54     if (pa_hashmap_get(map, key)) {
  55         pa_xfree(key);
  56         pa_xfree(value);
  57         return -1;
  58     }
  59
  60     if (valid_keys) {
  61         const char*const* v;
  62         for (v = valid_keys; *v; v++)
  63             if (strcmp(*v, key) == 0)
  64                 break;
  65
  66         if (!*v) {
  67             pa_xfree(key);
  68             pa_xfree(value);
  69             return -1;
  70         }
  71     }
  72
  73     e = pa_xnew(struct entry, 1);
  74     e->key = key;
  75     e->value = value;
  76     pa_hashmap_put(map, key, e);
  77
  78     return 0;
  79 }
  80
  81 pa_modargs *pa_modargs_new(const char *args, const char* const* valid_keys) {
  82     pa_hashmap *map = NULL;
  83
  84     map = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
  85
  86     if (args) {
  87         enum {
  88             WHITESPACE,
  89             KEY,
  90             VALUE_START,
  91             VALUE_SIMPLE,
  92             VALUE_DOUBLE_QUOTES,
  93             VALUE_TICKS
  94         } state;
  95
  96         const char *p, *key, *value;
  97         size_t key_len = 0, value_len = 0;
  98
  99         key = value = NULL;
 100         state = WHITESPACE;
 101         for (p = args; *p; p++) {
 102             switch (state) {
 103                 case WHITESPACE:
 104                     if (*p == '=')
 105                         goto fail;
 106                     else if (!isspace(*p)) {
 107                         key = p;
 108                         state = KEY;
 109                         key_len = 1;
 110                     }
 111                     break;
 112                 case KEY:
 113                     if (*p == '=')
 114                         state = VALUE_START;
 115                     else if (isspace(*p))
 116                         goto fail;
 117                     else
 118                         key_len++;
 119                     break;
 120                 case  VALUE_START:
 121                     if (*p == '\'') {
 122                         state = VALUE_TICKS;
 123                         value = p+1;
 124                         value_len = 0;
 125                     } else if (*p == '"') {
 126                         state = VALUE_DOUBLE_QUOTES;
 127                         value = p+1;
 128                         value_len = 0;
 129                     } else if (isspace(*p)) {
 130                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(""), valid_keys) < 0)
 131                             goto fail;
 132                         state = WHITESPACE;
 133                     } else {
 134                         state = VALUE_SIMPLE;
 135                         value = p;
 136                         value_len = 1;
 137                     }
 138                     break;
 139                 case VALUE_SIMPLE:
 140                     if (isspace(*p)) {
 141                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 142                             goto fail;
 143                         state = WHITESPACE;
 144                     } else
 145                         value_len++;
 146                     break;
 147                 case VALUE_DOUBLE_QUOTES:
 148                     if (*p == '"') {
 149                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 150                             goto fail;
 151                         state = WHITESPACE;
 152                     } else
 153                         value_len++;
 154                     break;
 155                 case VALUE_TICKS:
 156                     if (*p == '\'') {
 157                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 158                             goto fail;
 159                         state = WHITESPACE;
 160                     } else
 161                         value_len++;
 162                     break;
 163             }
 164         }
 165
 166         if (state == VALUE_START) {
 167             if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(""), valid_keys) < 0)
 168                 goto fail;
 169         } else if (state == VALUE_SIMPLE) {
 170             if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(value), valid_keys) < 0)
 171                 goto fail;
 172         } else if (state != WHITESPACE)
 173             goto fail;
 174     }
 175
 176     return (pa_modargs*) map;
 177
 178 fail:
 179
 180     if (map)
 181         pa_modargs_free((pa_modargs*) map);
 182
 183     return NULL;
 184 }
 185
 186 static void free_func(void *p, PA_GCC_UNUSED void*userdata) {
 187     struct entry *e = p;
 188     pa_assert(e);
 189
 190     pa_xfree(e->key);
 191     pa_xfree(e->value);
 192     pa_xfree(e);
 193 }
 194
 195 void pa_modargs_free(pa_modargs*ma) {
 196     pa_hashmap *map = (pa_hashmap*) ma;
 197     pa_hashmap_free(map, free_func, NULL);
 198 }
 199
 200 const char *pa_modargs_get_value(pa_modargs *ma, const char *key, const char *def) {
 201     pa_hashmap *map = (pa_hashmap*) ma;
 202     struct entry*e;
 203
 204     if (!(e = pa_hashmap_get(map, key)))
 205         return def;
 206
 207     return e->value;
 208 }
 209
 210 int pa_modargs_get_value_u32(pa_modargs *ma, const char *key, uint32_t *value) {
 211     const char *v;
 212
 213     pa_assert(ma);
 214     pa_assert(key);
 215     pa_assert(value);
 216
 217     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 218         return 0;
 219
 220     if (pa_atou(v, value) < 0)
 221         return -1;
 222
 223     return 0;
 224 }
 225
 226 int pa_modargs_get_value_s32(pa_modargs *ma, const char *key, int32_t *value) {
 227     const char *v;
 228
 229     pa_assert(ma);
 230     pa_assert(key);
 231     pa_assert(value);
 232
 233     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 234         return 0;
 235
 236     if (pa_atoi(v, value) < 0)
 237         return -1;
 238
 239     return 0;
 240 }
 241
 242 int pa_modargs_get_value_boolean(pa_modargs *ma, const char *key, pa_bool_t *value) {
 243     const char *v;
 244     int r;
 245
 246     pa_assert(ma);
 247     pa_assert(key);
 248     pa_assert(value);
 249
 250     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 251         return 0;
 252
 253     if (!*v)
 254         return -1;
 255
 256     if ((r = pa_parse_boolean(v)) < 0)
 257         return -1;
 258
 259     *value = r;
 260     return 0;
 261 }
 262
 263 int pa_modargs_get_sample_spec(pa_modargs *ma, pa_sample_spec *rss) {
 264     const char *format;
 265     uint32_t channels;
 266     pa_sample_spec ss;
 267
 268     pa_assert(ma);
 269     pa_assert(rss);
 270
 271     ss = *rss;
 272     if ((pa_modargs_get_value_u32(ma, "rate", &ss.rate)) < 0)
 273         return -1;
 274
 275     channels = ss.channels;
 276     if ((pa_modargs_get_value_u32(ma, "channels", &channels)) < 0)
 277         return -1;
 278     ss.channels = (uint8_t) channels;
 279
 280     if ((format = pa_modargs_get_value(ma, "format", NULL)))
 281         if ((ss.format = pa_parse_sample_format(format)) < 0)
 282             return -1;
 283
 284     if (!pa_sample_spec_valid(&ss))
 285         return -1;
 286
 287     *rss = ss;
 288
 289     return 0;
 290 }
 291
 292 int pa_modargs_get_channel_map(pa_modargs *ma, const char *name, pa_channel_map *rmap) {
 293     pa_channel_map map;
 294     const char *cm;
 295
 296     pa_assert(ma);
 297     pa_assert(rmap);
 298
 299     map = *rmap;
 300
 301     if ((cm = pa_modargs_get_value(ma, name ? name : "channel_map", NULL)))
 302         if (!pa_channel_map_parse(&map, cm))
 303             return -1;
 304
 305     if (!pa_channel_map_valid(&map))
 306         return -1;
 307
 308     *rmap = map;
 309     return 0;
 310 }
 311
 312 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) {
 313     pa_sample_spec ss;
 314     pa_channel_map map;
 315
 316     pa_assert(ma);
 317     pa_assert(rss);
 318     pa_assert(rmap);
 319
 320     ss = *rss;
 321
 322     if (pa_modargs_get_sample_spec(ma, &ss) < 0)
 323         return -1;
 324
 325     if (!pa_channel_map_init_auto(&map, ss.channels, def))
 326         map.channels = 0;
 327
 328     if (pa_modargs_get_channel_map(ma, NULL, &map) < 0)
 329         return -1;
 330
 331     if (map.channels != ss.channels)
 332         return -1;
 333
 334     *rmap = map;
 335     *rss = ss;
 336
 337     return 0;
 338 }