Extracted from Global afb-audio repo

1 files changed, 336 insertions, 0 deletions

diff --git a/MOST_UNICENS/wrap_unicens.c b/MOST_UNICENS/wrap_unicens.c
new file mode 100644
index 0000000..095a2fe
--- /dev/null
+++ b/MOST_UNICENS/wrap_unicens.c
@@ -0,0 +1,336 @@
+/*
+ * Copyright (C) 2017, Microchip Technology Inc. and its subsidiaries.
+ * Author Tobias Jahnke
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+#define _GNU_SOURCE
+#define AFB_BINDING_VERSION 2
+
+#include <string.h>
+#include <json-c/json.h>
+#include <afb/afb-binding.h>
+#include "wrap_unicens.h"
+#include "wrap-json.h"
+
+typedef struct async_job_ {
+    wrap_ucs_result_cb_t result_fptr;
+    void *result_user_ptr;
+} async_job_t;
+
+typedef struct parse_result_ {
+    int done;
+    char *str_result;
+} parse_result_t;
+
+/* Subscribes to unicens2-binding events.
+ * \return  Returns 0 if successful, otherwise != 0".
+ */
+extern int wrap_ucs_subscribe_sync() {
+
+    json_object *j_response, *j_query = NULL;
+    int err;
+
+    /* Build an empty JSON object */
+    err = wrap_json_pack(&j_query, "{}");
+    if (err) {
+        AFB_ERROR("Failed to create subscribe json object");
+        goto OnErrorExit;
+    }
+
+    err = afb_service_call_sync("UNICENS", "subscribe", j_query, &j_response);
+    if (err) {
+        AFB_ERROR("Fail subscribing to UNICENS events");
+        goto OnErrorExit;
+    }
+    else {
+        AFB_NOTICE("Subscribed to UNICENS events, res=%s", json_object_to_json_string(j_response));
+        json_object_put(j_response);
+    }
+    json_object_put(j_query);
+    j_query = NULL;
+
+OnErrorExit:
+    if (j_query)
+        json_object_put(j_query);
+    return err;
+}
+
+/* Checks if name ends with a given letter. */
+static int wrap_ucs_string_ends_with(const char *name, char letter) {
+
+    int result = 0;
+    size_t len = strlen(name);
+
+    if (len > 0) {
+
+        if (name[len] == letter) {
+            result = 1;
+        }
+    }
+
+    return result;
+}
+
+/* Callback for iteration through found files. Marks search as "done" as
+ * soon as the search pattern "kit.xml" matches.
+ * \param closure   User reference. Points to parse_result_t.
+ * \param j_obj     Points to json object within array.
+ */
+static void wrap_ucs_find_xml_cb(void *closure, struct json_object *j_obj) {
+
+    const char *dir, *name;
+    parse_result_t *result;
+
+    if (!closure)
+        return;
+
+    result = (parse_result_t *)closure;
+    if (result->done)
+        return;
+
+    wrap_json_unpack(j_obj, "{s:s, s:s}", "dirpath", &dir, "basename", &name);
+    AFB_DEBUG("Found file: %s", name);
+
+    if(strstr(name, "kit.xml") != NULL) {
+        size_t sz = strlen(dir)+strlen(name)+10;
+        char * full_path = malloc(sz);
+
+        strncpy(full_path, dir, sz);
+
+        if (!wrap_ucs_string_ends_with(dir, '/'))
+            strncat(full_path, "/", sz);
+
+        strncat(full_path, name, sz);
+        AFB_DEBUG("Found XML file: %s", full_path);
+
+        result->done = 1;
+        result->str_result = full_path;
+    }
+}
+
+/* Retrieves XML configuration path to initialize unicens2-binding.
+ * \param   config_path Directory containing XML configuration file(s).
+ * \param   file_found  Points to found file_path or NULL if not found.
+ *          Memory must be released by calling free().
+ * \return  Returns 0 if successful, otherwise != 0".
+ */
+extern int wrap_ucs_getconfig_sync(const char *config_path, char **file_found) {
+
+    int err = 0;
+    json_object *j_response, *j_query, *j_paths = NULL;
+    parse_result_t result = {.done = 0, .str_result = NULL};
+
+    *file_found = NULL;
+
+    /* Build JSON object to retrieve UNICENS configuration */
+    if ((config_path == NULL) || (strcmp(config_path, "") == 0))
+        err = wrap_json_pack(&j_query, "{}");
+    else
+        err = wrap_json_pack(&j_query, "{s:s}", "cfgpath", config_path);
+
+    if (err) {
+        AFB_ERROR("Failed to create listconfig json object");
+        goto OnErrorExit;
+    }
+
+    err = afb_service_call_sync("UNICENS", "listconfig", j_query, &j_response);
+    if (err) {
+        AFB_ERROR("Failed to call listconfig");
+        goto OnErrorExit;
+    }
+    else {
+        AFB_DEBUG("UNICENS listconfig result, res=%s", json_object_to_json_string(j_response));
+
+        if (json_object_object_get_ex(j_response, "response", &j_paths)) {
+
+            AFB_DEBUG("UNICENS listconfig result, paths=%s", json_object_to_json_string(j_paths));
+
+            wrap_json_optarray_for_all(j_paths, &wrap_ucs_find_xml_cb, &result);
+
+            if (result.done) {
+                *file_found = strdup(result.str_result);
+                free(result.str_result);
+                result.str_result = NULL;
+            }
+            else {
+                AFB_NOTICE("wrap_ucs_getconfig_sync, search pattern does not match for paths=%s", json_object_to_json_string(j_paths));
+                err = -1;
+            }
+        }
+
+        json_object_put(j_response);
+    }
+    json_object_put(j_query);
+    j_query = NULL;
+
+OnErrorExit:
+    if (j_query)
+        json_object_put(j_query);
+    return err;
+}
+
+/* Initializes the unicens2-binding.
+ * \param   file_name     Path to XML configuration file or \c NULL for
+ *                        first found file in default path.
+ * \return  Returns 0 if successful, otherwise != 0".
+ */
+extern int wrap_ucs_initialize_sync(const char *file_name) {
+    json_object *j_response, *j_query = NULL;
+    int err;
+
+    /* Build JSON object to initialize UNICENS */
+    if (file_name != NULL)
+        err = wrap_json_pack(&j_query, "{s:s}", "filename", file_name);
+    else
+        err = wrap_json_pack(&j_query, "{}");
+
+    if (err) {
+        AFB_ERROR("Failed to create initialize json object");
+        goto OnErrorExit;
+    }
+    err = afb_service_call_sync("UNICENS", "initialise", j_query, &j_response);
+    if (err) {
+        AFB_ERROR("Failed to initialize UNICENS");
+        goto OnErrorExit;
+    }
+    else {
+        AFB_NOTICE("Initialized UNICENS, res=%s", json_object_to_json_string(j_response));
+        json_object_put(j_response);
+    }
+
+    json_object_put(j_query);
+    j_query = NULL;
+
+OnErrorExit:
+    if (j_query)
+        json_object_put(j_query);
+    return err;
+}
+
+/* Write I2C command to a network node.
+ * \param   node     Node address
+ * \param   data_ptr Reference to command data
+ * \param   data_sz  Size of the command data. Valid values: 1..32.
+ * \return  Returns 0 if successful, otherwise != 0".
+ */
+extern int wrap_ucs_i2cwrite_sync(uint16_t node, uint8_t *data_ptr, uint8_t data_sz) {
+
+    json_object *j_response, *j_query, *j_array = NULL;
+    int err;
+    uint8_t cnt;
+
+    j_query = json_object_new_object();
+    j_array = json_object_new_array();
+
+    if (!j_query || !j_array) {
+        err = -1;
+        AFB_ERROR("Failed to create writei2c json objects");
+        goto OnErrorExit;
+    }
+
+    for (cnt = 0U; cnt < data_sz; cnt++) {
+        json_object_array_add(j_array, json_object_new_int(data_ptr[cnt]));
+    }
+
+    json_object_object_add(j_query, "node", json_object_new_int(node));
+    json_object_object_add(j_query, "data", j_array);
+
+    err = afb_service_call_sync("UNICENS", "writei2c", j_query, &j_response);
+
+    if (err) {
+        AFB_ERROR("Failed to call writei2c_sync");
+        goto OnErrorExit;
+    }
+    else {
+        AFB_INFO("Called writei2c_sync, res=%s", json_object_to_json_string(j_response));
+        json_object_put(j_response);
+    }
+
+    json_object_put(j_query);
+    j_query = NULL;
+
+OnErrorExit:
+    if (j_query)
+        json_object_put(j_query);
+    return err;
+}
+
+/* ------------------ ASYNCHRONOUS API ---------------------------------------*/
+
+static void wrap_ucs_i2cwrite_cb(void *closure, int status, struct json_object *j_result) {
+
+    AFB_INFO("wrap_ucs_i2cwrite_cb: closure=%p status=%d, res=%s", closure, status, json_object_to_json_string(j_result));
+
+    if (closure) {
+        async_job_t *job_ptr = (async_job_t *)closure;
+
+        if (job_ptr->result_fptr)
+            job_ptr->result_fptr((uint8_t)abs(status), job_ptr->result_user_ptr);
+        
+        free(closure);
+    }
+}
+
+/* Write I2C command to a network node.
+ * \param   node     Node address
+ * \param   data_ptr Reference to command data
+ * \param   data_sz  Size of the command data. Valid values: 1..32.
+ * \return  Returns 0 if successful, otherwise != 0".
+ */
+extern int wrap_ucs_i2cwrite(uint16_t node, uint8_t *data_ptr, uint8_t data_sz,
+                             wrap_ucs_result_cb_t result_fptr,
+                             void *result_user_ptr) {
+
+    json_object *j_query, *j_array = NULL;
+    async_job_t *job_ptr = NULL;
+    int err;
+    uint8_t cnt;
+
+    j_query = json_object_new_object();
+    j_array = json_object_new_array();
+
+    if (!j_query || !j_array) {
+        err = -1;
+        AFB_ERROR("Failed to create writei2c json objects");
+        goto OnErrorExit;
+    }
+
+    for (cnt = 0U; cnt < data_sz; cnt++) {
+        json_object_array_add(j_array, json_object_new_int(data_ptr[cnt]));
+    }
+
+    json_object_object_add(j_query, "node", json_object_new_int(node));
+    json_object_object_add(j_query, "data", j_array);
+
+    job_ptr = malloc(sizeof(async_job_t));
+
+    if (!job_ptr) {
+        err = -1;
+        AFB_ERROR("Failed to create async job object");
+        goto OnErrorExit;
+    }
+
+    job_ptr->result_fptr = result_fptr;
+    job_ptr->result_user_ptr = result_user_ptr;
+
+    afb_service_call("UNICENS", "writei2c", j_query, wrap_ucs_i2cwrite_cb, job_ptr);
+    err = 0;
+    j_query = NULL;
+
+OnErrorExit:
+    if (j_query)
+        json_object_put(j_query);
+    return err;
+}