code.delx.au - pulseaudio/blob - src/polypcore/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 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   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 Lesser 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 #include "xmalloc.h"
  39 #include "util.h"
  40
  41 struct entry {
  42     char *key, *value;
  43 };
  44
  45 static int add_key_value(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             pa_xfree(key);
  57             pa_xfree(value);
  58             return -1;
  59         }
  60     }
  61
  62     e = pa_xmalloc(sizeof(struct entry));
  63     e->key = key;
  64     e->value = value;
  65     pa_hashmap_put(map, key, e);
  66     return 0;
  67 }
  68
  69 pa_modargs *pa_modargs_new(const char *args, const char* const* valid_keys) {
  70     pa_hashmap *map = NULL;
  71
  72     map = pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func);
  73     assert(map);
  74
  75     if (args) {
  76         enum { WHITESPACE, KEY, VALUE_START, VALUE_SIMPLE, VALUE_DOUBLE_QUOTES, VALUE_TICKS } state;
  77         const char *p, *key, *value;
  78         size_t key_len = 0, value_len = 0;
  79
  80         key = value = NULL;
  81         state = WHITESPACE;
  82         for (p = args; *p; p++) {
  83             switch (state) {
  84                 case WHITESPACE:
  85                     if (*p == '=')
  86                         goto fail;
  87                     else if (!isspace(*p)) {
  88                         key = p;
  89                         state = KEY;
  90                         key_len = 1;
  91                     }
  92                     break;
  93                 case KEY:
  94                     if (*p == '=')
  95                         state = VALUE_START;
  96                     else
  97                         key_len++;
  98                     break;
  99                 case  VALUE_START:
 100                     if (*p == '\'') {
 101                         state = VALUE_TICKS;
 102                         value = p+1;
 103                         value_len = 0;
 104                     } else if (*p == '"') {
 105                         state = VALUE_DOUBLE_QUOTES;
 106                         value = p+1;
 107                         value_len = 0;
 108                     } else if (isspace(*p)) {
 109                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(""), valid_keys) < 0)
 110                             goto fail;
 111                         state = WHITESPACE;
 112                     } else {
 113                         state = VALUE_SIMPLE;
 114                         value = p;
 115                         value_len = 1;
 116                     }
 117                     break;
 118                 case VALUE_SIMPLE:
 119                     if (isspace(*p)) {
 120                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 121                             goto fail;
 122                         state = WHITESPACE;
 123                     } else
 124                         value_len++;
 125                     break;
 126                 case VALUE_DOUBLE_QUOTES:
 127                     if (*p == '"') {
 128                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 129                             goto fail;
 130                         state = WHITESPACE;
 131                     } else
 132                         value_len++;
 133                     break;
 134                 case VALUE_TICKS:
 135                     if (*p == '\'') {
 136                         if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrndup(value, value_len), valid_keys) < 0)
 137                             goto fail;
 138                         state = WHITESPACE;
 139                     } else
 140                         value_len++;
 141                     break;
 142             }
 143         }
 144
 145         if (state == VALUE_START) {
 146             if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(""), valid_keys) < 0)
 147                 goto fail;
 148         } else if (state == VALUE_SIMPLE) {
 149             if (add_key_value(map, pa_xstrndup(key, key_len), pa_xstrdup(value), valid_keys) < 0)
 150                 goto fail;
 151         } else if (state != WHITESPACE)
 152             goto fail;
 153     }
 154
 155     return (pa_modargs*) map;
 156
 157 fail:
 158
 159     if (map)
 160         pa_modargs_free((pa_modargs*) map);
 161
 162     return NULL;
 163 }
 164
 165
 166 static void free_func(void *p, PA_GCC_UNUSED void*userdata) {
 167     struct entry *e = p;
 168     assert(e);
 169     pa_xfree(e->key);
 170     pa_xfree(e->value);
 171     pa_xfree(e);
 172 }
 173
 174 void pa_modargs_free(pa_modargs*ma) {
 175     pa_hashmap *map = (pa_hashmap*) ma;
 176     pa_hashmap_free(map, free_func, NULL);
 177 }
 178
 179 const char *pa_modargs_get_value(pa_modargs *ma, const char *key, const char *def) {
 180     pa_hashmap *map = (pa_hashmap*) ma;
 181     struct entry*e;
 182
 183     if (!(e = pa_hashmap_get(map, key)))
 184         return def;
 185
 186     return e->value;
 187 }
 188
 189 int pa_modargs_get_value_u32(pa_modargs *ma, const char *key, uint32_t *value) {
 190     const char *v;
 191     assert(ma && key && value);
 192
 193     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 194         return 0;
 195
 196     if (pa_atou(v, value) < 0)
 197         return -1;
 198
 199     return 0;
 200 }
 201
 202 int pa_modargs_get_value_s32(pa_modargs *ma, const char *key, int32_t *value) {
 203     const char *v;
 204     assert(ma && key && value);
 205
 206     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 207         return 0;
 208
 209     if (pa_atoi(v, value) < 0)
 210         return -1;
 211
 212     return 0;
 213 }
 214
 215 int pa_modargs_get_value_boolean(pa_modargs *ma, const char *key, int *value) {
 216     const char *v;
 217     int r;
 218     assert(ma && key && value);
 219
 220     if (!(v = pa_modargs_get_value(ma, key, NULL)))
 221         return 0;
 222
 223     if (!*v)
 224         return -1;
 225
 226     if ((r = pa_parse_boolean(v)) < 0)
 227         return -1;
 228
 229     *value = r;
 230     return 0;
 231 }
 232
 233 int pa_modargs_get_sample_spec(pa_modargs *ma, pa_sample_spec *rss) {
 234     const char *format;
 235     uint32_t channels;
 236     pa_sample_spec ss;
 237     assert(ma && rss);
 238
 239 /*    DEBUG_TRAP;*/
 240
 241     ss = *rss;
 242     if ((pa_modargs_get_value_u32(ma, "rate", &ss.rate)) < 0)
 243         return -1;
 244
 245     channels = ss.channels;
 246     if ((pa_modargs_get_value_u32(ma, "channels", &channels)) < 0)
 247         return -1;
 248     ss.channels = (uint8_t) channels;
 249
 250     if ((format = pa_modargs_get_value(ma, "format", NULL)))
 251         if ((ss.format = pa_parse_sample_format(format)) < 0)
 252             return -1;
 253
 254     if (!pa_sample_spec_valid(&ss))
 255         return -1;
 256
 257     *rss = ss;
 258
 259     return 0;
 260 }