code.delx.au - pulseaudio/blob - polyp/modargs.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of polypaudio.
   5
   6   polypaudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU 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   polypaudio 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 General Public License
  17   along with polypaudio; 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 <assert.h>
  28 #include <stdlib.h>
  29 #include <string.h>
  30
  31 #include "hashmap.h"
  32 #include "modargs.h"
  33 #include "idxset.h"
  34 #include "sample-util.h"
  35 #include "namereg.h"
  36 #include "sink.h"
  37 #include "source.h"
  38
  39 struct pa_modargs;
  40
  41 struct entry {
  42     char *key, *value;
  43 };
  44
  45 static int add_key_value(struct pa_hashmap *map, char *key, char *value, const char* const* valid_keys) {
  46     struct entry *e;
  47     assert(map && key && value);
  48
  49     if (valid_keys) {
  50         const char*const* v;
  51         for (v = valid_keys; *v; v++)
  52             if (strcmp(*v, key) == 0)
  53                 break;
  54
  55         if (!*v) {
  56             free(key);
  57             free(value);
  58             return -1;
  59         }
  60     }
  61
  62     e = malloc(sizeof(struct entry));
  63     assert(e);
  64     e->key = key;
  65     e->value = value;
  66     pa_hashmap_put(map, key, e);
  67     return 0;
  68 }
  69
  70 struct pa_modargs *pa_modargs_new(const char *args, const char* const* valid_keys) {
  71     struct pa_hashmap *map = NULL;
  72
  73     map = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
  74     assert(map);
  75
  76     if (args) {
  77         enum { WHITESPACE, KEY, VALUE_START, VALUE_SIMPLE, VALUE_DOUBLE_QUOTES, VALUE_TICKS } state;
  78         const char *p, *key, *value;
  79         size_t key_len, value_len;
  80
  81         key = value = NULL;
  82         state = WHITESPACE;
  83         for (p = args; *p; p++) {
  84             switch (state) {
  85                 case WHITESPACE:
  86                     if (*p == '=')
  87                         goto fail;
  88                     else if (!isspace(*p)) {
  89                         key = p;
  90                         state = KEY;
  91                         key_len = 1;
  92                     }
  93                     break;
  94                 case KEY:
  95                     if (*p == '=')
  96                         state = VALUE_START;
  97                     else
  98                         key_len++;
  99                     break;
 100                 case  VALUE_START:
 101                     if (*p == '\'') {
 102                         state = VALUE_TICKS;
 103                         value = p+1;
 104                         value_len = 0;
 105                     } else if (*p == '"') {
 106                         state = VALUE_DOUBLE_QUOTES;
 107                         value = p+1;
 108                         value_len = 0;
 109                     } else if (isspace(*p)) {
 110                         if (add_key_value(map, strndup(key, key_len), strdup(""), valid_keys) < 0)
 111                             goto fail;
 112                         state = WHITESPACE;
 113                     } else {
 114                         state = VALUE_SIMPLE;
 115                         value = p;
 116                         value_len = 1;
 117                     }
 118                     break;
 119                 case VALUE_SIMPLE:
 120                     if (isspace(*p)) {
 121                         if (add_key_value(map, strndup(key, key_len), strndup(value, value_len), valid_keys) < 0)
 122                             goto fail;
 123                         state = WHITESPACE;
 124                     } else
 125                         value_len++;
 126                     break;
 127                 case VALUE_DOUBLE_QUOTES:
 128                     if (*p == '"') {
 129                         if (add_key_value(map, strndup(key, key_len), strndup(value, value_len), valid_keys) < 0)
 130                             goto fail;
 131                         state = WHITESPACE;
 132                     } else
 133                         value_len++;
 134                     break;
 135                 case VALUE_TICKS:
 136                     if (*p == '\'') {
 137                         if (add_key_value(map, strndup(key, key_len), strndup(value, value_len), valid_keys) < 0)
 138                             goto fail;
 139                         state = WHITESPACE;
 140                     } else
 141                         value_len++;
 142                     break;
 143             }
 144         }
 145
 146         if (state == VALUE_START) {
 147             if (add_key_value(map, strndup(key, key_len), strdup(""), valid_keys) < 0)
 148                 goto fail;
 149         } else if (state == VALUE_SIMPLE) {
 150             if (add_key_value(map, strndup(key, key_len), strdup(value), valid_keys) < 0)
 151                 goto fail;
 152         } else if (state != WHITESPACE)
 153             goto fail;
 154     }
 155
 156     return (struct pa_modargs*) map;
 157
 158 fail:
 159
 160     if (map)
 161         pa_modargs_free((struct pa_modargs*) map);
 162
 163     return NULL;
 164 }
 165
 166
 167 static void free_func(void *p, void*userdata) {
 168     struct entry *e = p;
 169     assert(e);
 170     free(e->key);
 171     free(e->value);
 172     free(e);
 173 }
 174
 175 void pa_modargs_free(struct pa_modargs*ma) {
 176     struct pa_hashmap *map = (struct pa_hashmap*) ma;
 177     pa_hashmap_free(map, free_func, NULL);
 178 }
 179
 180 const char *pa_modargs_get_value(struct pa_modargs *ma, const char *key, const char *def) {
 181     struct pa_hashmap *map = (struct pa_hashmap*) ma;
 182     struct entry*e;
 183
 184     if (!(e = pa_hashmap_get(map, key)))
 185         return def;
 186
 187     return e->value;
 188 }
 189
 190 int pa_modargs_get_value_u32(struct pa_modargs *ma, const char *key, uint32_t *value) {
 191     const char *v;
 192     char *e;
 193     unsigned long l;
 194     assert(ma && key && value);
 195
 196     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 197         return 0;
 198
 199     if (!*v)
 200         return -1;
 201
 202     l = strtoul(v, &e, 0);
 203     if (*e)
 204         return -1;
 205
 206     *value = (uint32_t) l;
 207     return 0;
 208 }
 209
 210 int pa_modargs_get_sample_spec(struct pa_modargs *ma, struct pa_sample_spec *rss) {
 211     const char *format;
 212     uint32_t channels;
 213     struct pa_sample_spec ss;
 214     assert(ma && rss);
 215
 216     ss = *rss;
 217     if ((pa_modargs_get_value_u32(ma, "rate", &ss.rate)) < 0)
 218         return -1;
 219
 220     channels = ss.channels;
 221     if ((pa_modargs_get_value_u32(ma, "channels", &channels)) < 0)
 222         return -1;
 223     ss.channels = (uint8_t) channels;
 224
 225     if ((format = pa_modargs_get_value(ma, "format", NULL))) {
 226         if (strcmp(format, "s16le") == 0)
 227             ss.format = PA_SAMPLE_S16LE;
 228         else if (strcmp(format, "s16be") == 0)
 229             ss.format = PA_SAMPLE_S16BE;
 230         else if (strcmp(format, "s16ne") == 0 || strcmp(format, "s16") == 0 || strcmp(format, "16") == 0)
 231             ss.format = PA_SAMPLE_S16NE;
 232         else if (strcmp(format, "u8") == 0 || strcmp(format, "8") == 0)
 233             ss.format = PA_SAMPLE_U8;
 234         else if (strcmp(format, "float32") == 0 || strcmp(format, "float32ne") == 0)
 235             ss.format = PA_SAMPLE_FLOAT32;
 236         else if (strcmp(format, "float32le") == 0)
 237             ss.format = PA_SAMPLE_FLOAT32LE;
 238         else if (strcmp(format, "float32be") == 0)
 239             ss.format = PA_SAMPLE_FLOAT32BE;
 240         else if (strcmp(format, "ulaw") == 0)
 241             ss.format = PA_SAMPLE_ULAW;
 242         else if (strcmp(format, "alaw") == 0)
 243             ss.format = PA_SAMPLE_ALAW;
 244         else
 245             return -1;
 246     }
 247
 248     if (!pa_sample_spec_valid(&ss))
 249         return -1;
 250
 251     *rss = ss;
 252
 253     return 0;
 254 }
 255
 256 int pa_modargs_get_source_index(struct pa_modargs *ma, struct pa_core *c, uint32_t *index) {
 257     const char *t;
 258     assert(ma && index);
 259
 260     if (!(t = pa_modargs_get_value(ma, "source", NULL)))
 261         *index = PA_IDXSET_INVALID;
 262     else {
 263         struct pa_source *source;
 264         if (!(source = pa_namereg_get(c, t, PA_NAMEREG_SOURCE)))
 265             return -1;
 266
 267         *index = source->index;
 268     }
 269
 270     return 0;
 271 }
 272
 273 int pa_modargs_get_sink_index(struct pa_modargs *ma, struct pa_core *c, uint32_t *index) {
 274     const char *t;
 275     assert(ma && index);
 276
 277     if (!(t = pa_modargs_get_value(ma, "sink", NULL)))
 278         *index = PA_IDXSET_INVALID;
 279     else {
 280         struct pa_sink *sink;
 281         if (!(sink = pa_namereg_get(c, t, PA_NAMEREG_SINK)))
 282             return -1;
 283
 284         *index = sink->index;
 285     }
 286
 287     return 0;
 288 }