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/*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Support for the verb/device/modifier core logic and API,
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* command line tool and file parser was kindly sponsored by
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* Texas Instruments Inc.
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* Support for multiple active modifiers and devices,
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* transition sequences, multiple client access and user defined use
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* cases was kindly sponsored by Wolfson Microelectronics PLC.
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*
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* Copyright (C) 2019 Red Hat Inc.
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* Authors: Jaroslav Kysela <perex@perex.cz>
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*/
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#include "ucm_local.h"
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#include <regex.h>
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static int get_string(snd_config_t *compound, const char *key, const char **str)
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{
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snd_config_t *node;
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int err;
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err = snd_config_search(compound, key, &node);
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if (err < 0)
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return err;
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return snd_config_get_string(node, str);
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}
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static int if_eval_string(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
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{
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const char *string1 = NULL, *string2 = NULL;
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char *s1, *s2;
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int err;
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err = get_string(eval, "String1", &string1);
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if (err < 0 && err != -ENOENT) {
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uc_error("String error (If.Condition.String1)");
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return -EINVAL;
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}
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err = get_string(eval, "String2", &string2);
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if (err < 0 && err != -ENOENT) {
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uc_error("String error (If.Condition.String2)");
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return -EINVAL;
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}
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if (string1 || string2) {
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if (string1 == NULL) {
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uc_error("If.Condition.String1 not defined");
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return -EINVAL;
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}
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if (string2 == NULL) {
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uc_error("If.Condition.String2 not defined");
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return -EINVAL;
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}
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err = uc_mgr_get_substituted_value(uc_mgr, &s1, string1);
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if (err < 0)
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return err;
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err = uc_mgr_get_substituted_value(uc_mgr, &s2, string2);
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if (err < 0) {
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free(s1);
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return err;
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}
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err = strcasecmp(s1, s2) == 0;
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free(s2);
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free(s1);
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return err;
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}
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err = get_string(eval, "Haystack", &string1);
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if (err < 0 && err != -ENOENT) {
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uc_error("String error (If.Condition.Haystack)");
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return -EINVAL;
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}
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err = get_string(eval, "Needle", &string2);
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if (err < 0 && err != -ENOENT) {
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uc_error("String error (If.Condition.Needle)");
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return -EINVAL;
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}
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if (string1 || string2) {
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if (string1 == NULL) {
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uc_error("If.Condition.Haystack not defined");
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return -EINVAL;
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}
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if (string2 == NULL) {
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uc_error("If.Condition.Needle not defined");
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return -EINVAL;
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}
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err = uc_mgr_get_substituted_value(uc_mgr, &s1, string1);
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if (err < 0)
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return err;
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err = uc_mgr_get_substituted_value(uc_mgr, &s2, string2);
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if (err < 0) {
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free(s1);
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return err;
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}
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err = strstr(s1, s2) != NULL;
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free(s2);
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free(s1);
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return err;
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}
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uc_error("Unknown String condition arguments");
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return -EINVAL;
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}
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static int if_eval_regex_match(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
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{
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const char *string, *regex_string;
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char *s;
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regex_t re;
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int options = REG_EXTENDED | REG_ICASE;
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regmatch_t match[1];
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int err;
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err = get_string(eval, "String", &string);
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if (err < 0) {
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uc_error("RegexMatch error (If.Condition.String)");
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return -EINVAL;
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}
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err = get_string(eval, "Regex", ®ex_string);
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if (err < 0) {
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uc_error("RegexMatch error (If.Condition.Regex)");
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return -EINVAL;
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}
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err = uc_mgr_get_substituted_value(uc_mgr, &s, regex_string);
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if (err < 0)
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return err;
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err = regcomp(&re, s, options);
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free(s);
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if (err) {
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uc_error("Regex '%s' compilation failed (code %d)", err);
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return -EINVAL;
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}
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err = uc_mgr_get_substituted_value(uc_mgr, &s, string);
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if (err < 0) {
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regfree(&re);
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return err;
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}
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err = regexec(&re, s, ARRAY_SIZE(match), match, 0);
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free(s);
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regfree(&re);
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return err == 0;
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}
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static int if_eval_control_exists(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
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{
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snd_ctl_t *ctl;
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const char *device = NULL, *ctldef, *enumval = NULL, *name;
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snd_ctl_elem_id_t *elem_id;
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snd_ctl_elem_info_t *elem_info;
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snd_ctl_elem_type_t type;
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char *s;
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int err, i, items;
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snd_ctl_elem_id_alloca(&elem_id);
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snd_ctl_elem_info_alloca(&elem_info);
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err = get_string(eval, "Device", &device);
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if (err < 0 && err != -ENOENT) {
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uc_error("ControlExists error (If.Condition.Device)");
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return -EINVAL;
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}
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err = get_string(eval, "Control", &ctldef);
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if (err < 0) {
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uc_error("ControlExists error (If.Condition.Control)");
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return -EINVAL;
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}
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err = get_string(eval, "ControlEnum", &enumval);
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if (err < 0 && err != -ENOENT) {
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uc_error("ControlExists error (If.Condition.ControlEnum)");
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return -EINVAL;
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}
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err = uc_mgr_get_substituted_value(uc_mgr, &s, ctldef);
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if (err < 0)
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return err;
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err = snd_ctl_ascii_elem_id_parse(elem_id, s);
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free(s);
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if (err < 0) {
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uc_error("unable to parse element identificator (%s)", ctldef);
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return -EINVAL;
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}
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if (device == NULL) {
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ctl = uc_mgr_get_ctl(uc_mgr);
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if (ctl == NULL) {
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uc_error("cannot determine control device");
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return -EINVAL;
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}
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} else {
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err = uc_mgr_get_substituted_value(uc_mgr, &s, device);
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if (err < 0)
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return err;
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err = uc_mgr_open_ctl(uc_mgr, &ctl, s);
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free(s);
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if (err < 0)
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return err;
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}
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snd_ctl_elem_info_set_id(elem_info, elem_id);
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err = snd_ctl_elem_info(ctl, elem_info);
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if (err < 0)
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return 0;
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if (enumval) {
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type = snd_ctl_elem_info_get_type(elem_info);
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if (type != SND_CTL_ELEM_TYPE_ENUMERATED)
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return 0;
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err = uc_mgr_get_substituted_value(uc_mgr, &s, enumval);
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if (err < 0)
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return err;
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items = snd_ctl_elem_info_get_items(elem_info);
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for (i = 0; i < items; i++) {
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snd_ctl_elem_info_set_item(elem_info, i);
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err = snd_ctl_elem_info(ctl, elem_info);
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if (err < 0) {
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free(s);
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return err;
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}
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name = snd_ctl_elem_info_get_item_name(elem_info);
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if (strcasecmp(name, s) == 0) {
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free(s);
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return 1;
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}
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}
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free(s);
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return 0;
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}
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return 1;
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}
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static int if_eval(snd_use_case_mgr_t *uc_mgr, snd_config_t *eval)
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{
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const char *type;
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int err;
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if (snd_config_get_type(eval) != SND_CONFIG_TYPE_COMPOUND) {
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uc_error("compound type expected for If.Condition");
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return -EINVAL;
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}
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err = get_string(eval, "Type", &type);
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if (err < 0) {
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uc_error("type block error (If.Condition)");
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return -EINVAL;
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}
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if (strcmp(type, "ControlExists") == 0)
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return if_eval_control_exists(uc_mgr, eval);
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if (strcmp(type, "String") == 0)
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return if_eval_string(uc_mgr, eval);
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if (strcmp(type, "RegexMatch") == 0)
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return if_eval_regex_match(uc_mgr, eval);
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uc_error("unknown If.Condition.Type");
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return -EINVAL;
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}
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static int if_eval_one(snd_use_case_mgr_t *uc_mgr,
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snd_config_t *cond,
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snd_config_t **result,
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snd_config_t **before,
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snd_config_t **after)
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{
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snd_config_t *expr, *_true = NULL, *_false = NULL;
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int err;
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*result = NULL;
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if (snd_config_get_type(cond) != SND_CONFIG_TYPE_COMPOUND) {
|
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uc_error("compound type expected for If.1");
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return -EINVAL;
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Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (snd_config_search(cond, "Condition", &expr) < 0) {
|
|
Packit |
4a16fb |
uc_error("condition block expected (If)");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
err = snd_config_search(cond, "True", &_true);
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT) {
|
|
Packit |
4a16fb |
uc_error("true block error (If)");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
err = snd_config_search(cond, "False", &_false);
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT) {
|
|
Packit |
4a16fb |
uc_error("false block error (If)");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
err = snd_config_search(cond, "Before", before);
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT) {
|
|
Packit |
4a16fb |
uc_error("before block identifier error");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
err = snd_config_search(cond, "After", after);
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT) {
|
|
Packit |
4a16fb |
uc_error("before block identifier error");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
err = if_eval(uc_mgr, expr);
|
|
Packit |
4a16fb |
if (err > 0) {
|
|
Packit |
4a16fb |
*result = _true;
|
|
Packit |
4a16fb |
return 0;
|
|
Packit |
4a16fb |
} else if (err == 0) {
|
|
Packit |
4a16fb |
*result = _false;
|
|
Packit |
4a16fb |
return 0;
|
|
Packit |
4a16fb |
} else {
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
#if 0
|
|
Packit |
4a16fb |
static void config_dump(snd_config_t *cfg)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
snd_output_t *out;
|
|
Packit |
4a16fb |
snd_output_stdio_attach(&out, stderr, 0);
|
|
Packit |
4a16fb |
snd_output_printf(out, "-----\n");
|
|
Packit |
4a16fb |
snd_config_save(cfg, out);
|
|
Packit |
4a16fb |
snd_output_close(out);
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
#endif
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
static int compound_merge(const char *id,
|
|
Packit |
4a16fb |
snd_config_t *dst, snd_config_t *src,
|
|
Packit |
4a16fb |
snd_config_t *before, snd_config_t *after)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
snd_config_iterator_t i, next;
|
|
Packit |
4a16fb |
snd_config_t *n, *_before = NULL, *_after = NULL;
|
|
Packit |
4a16fb |
const char *s;
|
|
Packit |
4a16fb |
int err;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (snd_config_get_type(src) != SND_CONFIG_TYPE_COMPOUND) {
|
|
Packit |
4a16fb |
uc_error("compound type expected for If True/False block");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (before) {
|
|
Packit |
4a16fb |
err = get_string(before, id, &s);
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
if (err == 0) {
|
|
Packit |
4a16fb |
err = snd_config_search(dst, s, &_before);
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
if (after) {
|
|
Packit |
4a16fb |
err = get_string(after, id, &s);
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
if (err == 0) {
|
|
Packit |
4a16fb |
err = snd_config_search(dst, s, &_after);
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (_before && _after) {
|
|
Packit |
4a16fb |
uc_error("defined both before and after identifiers in the If block");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
snd_config_for_each(i, next, src) {
|
|
Packit |
4a16fb |
n = snd_config_iterator_entry(i);
|
|
Packit |
4a16fb |
err = snd_config_remove(n);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
if (_before) {
|
|
Packit |
4a16fb |
err = snd_config_add_before(_before, n);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
_before = NULL;
|
|
Packit |
4a16fb |
_after = n;
|
|
Packit |
4a16fb |
} else if (_after) {
|
|
Packit |
4a16fb |
err = snd_config_add_after(_after, n);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
_after = n;
|
|
Packit |
4a16fb |
} else {
|
|
Packit |
4a16fb |
err = snd_config_add(dst, n);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
return 0;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
/*
|
|
Packit |
4a16fb |
* put back the result from all conditions to the parent
|
|
Packit |
4a16fb |
*/
|
|
Packit |
4a16fb |
int uc_mgr_evaluate_condition(snd_use_case_mgr_t *uc_mgr,
|
|
Packit |
4a16fb |
snd_config_t *parent,
|
|
Packit |
4a16fb |
snd_config_t *cond)
|
|
Packit |
4a16fb |
{
|
|
Packit |
4a16fb |
snd_config_iterator_t i, i2, next, next2;
|
|
Packit |
4a16fb |
snd_config_t *a, *n, *n2, *parent2, *before, *after;
|
|
Packit |
4a16fb |
const char *id;
|
|
Packit |
4a16fb |
int err;
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (uc_mgr->conf_format < 2) {
|
|
Packit |
4a16fb |
uc_error("conditions are not supported for v1 syntax");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
if (snd_config_get_type(cond) != SND_CONFIG_TYPE_COMPOUND) {
|
|
Packit |
4a16fb |
uc_error("compound type expected for If");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
|
|
Packit |
4a16fb |
snd_config_for_each(i, next, cond) {
|
|
Packit |
4a16fb |
n = snd_config_iterator_entry(i);
|
|
Packit |
4a16fb |
before = after = NULL;
|
|
Packit |
4a16fb |
err = if_eval_one(uc_mgr, n, &a, &before, &after);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
if (a == NULL)
|
|
Packit |
4a16fb |
continue;
|
|
Packit |
4a16fb |
err = snd_config_search(a, "If", &n2;;
|
|
Packit |
4a16fb |
if (err < 0 && err != -ENOENT) {
|
|
Packit |
4a16fb |
uc_error("If block error (If)");
|
|
Packit |
4a16fb |
return -EINVAL;
|
|
Packit |
4a16fb |
} else if (err == 0) {
|
|
Packit |
4a16fb |
err = uc_mgr_evaluate_condition(uc_mgr, a, n2);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
snd_config_delete(n2);
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
snd_config_for_each(i2, next2, a) {
|
|
Packit |
4a16fb |
n2 = snd_config_iterator_entry(i2);
|
|
Packit |
4a16fb |
err = snd_config_remove(n2);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
err = snd_config_get_id(n2, &id;;
|
|
Packit |
4a16fb |
if (err < 0) {
|
|
Packit |
4a16fb |
__add:
|
|
Packit |
4a16fb |
err = snd_config_add(parent, n2);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
continue;
|
|
Packit |
4a16fb |
} else {
|
|
Packit |
4a16fb |
err = snd_config_search(parent, id, &parent2);
|
|
Packit |
4a16fb |
if (err == -ENOENT)
|
|
Packit |
4a16fb |
goto __add;
|
|
Packit |
4a16fb |
err = compound_merge(id, parent2, n2, before, after);
|
|
Packit |
4a16fb |
if (err < 0)
|
|
Packit |
4a16fb |
return err;
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
snd_config_delete(n2);
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
}
|
|
Packit |
4a16fb |
return 0;
|
|
Packit |
4a16fb |
}
|