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*参照元 [#x638428a] #backlinks *説明 [#t3ed43b8] -パス: [[alsa-lib-1.0.27.2/src/conf.c]] -FIXME: これは何？ --説明 **引数 [#cfd9445b] -snd_config_t *config -- --[[alsa-lib-1.0.27.2/snd_config_t]] -const char *base -- -const char *name -- -snd_config_t **result -- **返り値 [#b747c16e] -int -- **参考 [#a6917e35] *実装 [#i569d7c4] /** * \brief Searches for a definition in a configuration tree, using * aliases and expanding hooks and arguments. * \param[in] config Handle to the configuration (sub)tree to search. * \param[in] base Implicit key base, or \c NULL for none. * \param[in] name Key suffix, optionally with arguments. * \param[out] result The function puts the handle to the expanded found * node at the address specified by \a result. * \return A non-negative value if successful, otherwise a negative error code. * * This functions searches for a child node of \a config, allowing * aliases and expanding hooks, like #snd_config_search_alias_hooks. * * If \a name contains a colon (:), the rest of the string after the * colon contains arguments that are expanded as with * #snd_config_expand. * * In any case, \a result is a new node that must be freed by the * caller. * * \par Errors: * <dl> * <dt>-ENOENT<dd>An id in \a key or an alias id does not exist. * <dt>-ENOENT<dd>\a config or one of its child nodes to be searched is * not a compound node. * </dl> * Additionally, any errors encountered when parsing the hook * definitions or arguments, or returned by (hook) functions. */ int snd_config_search_definition(snd_config_t *config, const char *base, const char *name, snd_config_t **result) { snd_config_t *conf; char *key; const char *args = strchr(name, ':'); int err; if (args) { args++; key = alloca(args - name); memcpy(key, name, args - name - 1); key[args - name - 1] = '\0'; } else { key = (char *) name; } /* * if key contains dot (.), the implicit base is ignored * and the key starts from root given by the 'config' parameter */ snd_config_lock(); - --[[alsa-lib-1.0.27.2/snd_config_lock()]] err = snd_config_search_alias_hooks(config, strchr(key, '.') ? NULL : base, key, &conf); if (err < 0) { snd_config_unlock(); return err; } - --[[alsa-lib-1.0.27.2/snd_config_search_alias_hooks()]] - --[[alsa-lib-1.0.27.2/snd_config_unlock()]] err = snd_config_expand(conf, config, args, NULL, result); snd_config_unlock(); return err; - --[[alsa-lib-1.0.27.2/snd_config_expand()]] } *コメント [#q47eef54]
