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