Version 1.0.0

Initial version.

components/zh_json/zh_json.c

@@ -0,0 +1,102 @@
+/**
+ * @file
+ * The main code of the zh_json component.
+ *
+ */
+
+#include "zh_json.h"
+
+static void _resize(zh_json_t *json, uint8_t capacity);
+static void *_get_name(zh_json_t *json, uint8_t index);
+static void *_get_value(zh_json_t *json, uint8_t index);
+
+esp_err_t zh_json_init(zh_json_t *json)
+{
+    if (json == NULL)
+    {
+        return ESP_ERR_INVALID_ARG;
+    }
+    json->capacity = 0;
+    json->size = 0;
+    json->names = calloc(json->capacity, sizeof(char *));
+    json->values = calloc(json->capacity, sizeof(char *));
+    return ESP_OK;
+}
+
+esp_err_t zh_json_free(zh_json_t *json)
+{
+    if (json == NULL)
+    {
+        return ESP_ERR_INVALID_ARG;
+    }
+    free(json->names);
+    free(json->values);
+    return ESP_OK;
+}
+
+static void _resize(zh_json_t *json, uint8_t capacity)
+{
+    char **name = realloc(json->names, sizeof(char *) * capacity);
+    char **value = realloc(json->values, sizeof(char *) * capacity);
+    json->names = name;
+    json->values = value;
+    json->capacity = capacity;
+}
+
+static void *_get_name(zh_json_t *json, uint8_t index)
+{
+    char *name = NULL;
+    if (index < json->size)
+    {
+        name = json->names[index];
+    }
+    return name;
+}
+
+static void *_get_value(zh_json_t *json, uint8_t index)
+{
+    char *value = NULL;
+    if (index < json->size)
+    {
+        value = json->values[index];
+    }
+    return value;
+}
+
+esp_err_t zh_json_add(zh_json_t *json, char *name, char *value)
+{
+    if (json == NULL || name == NULL || value == NULL)
+    {
+        return ESP_ERR_INVALID_ARG;
+    }
+    if (json->capacity == json->size)
+    {
+        _resize(json, json->capacity + 1);
+    }
+    json->names[json->size] = name;
+    json->values[json->size++] = value;
+    return ESP_OK;
+}
+
+esp_err_t zh_json_create(zh_json_t *json, char *buffer)
+{
+    if (json == NULL || buffer == NULL)
+    {
+        return ESP_ERR_INVALID_ARG;
+    }
+    strcat(buffer, "{ ");
+    for (uint8_t i = 0; i < json->size; ++i)
+    {
+        strcat(buffer, "\"");
+        strcat(buffer, _get_name(json, i));
+        strcat(buffer, "\": \"");
+        strcat(buffer, _get_value(json, i));
+        strcat(buffer, "\"");
+        if (i != json->size - 1)
+        {
+            strcat(buffer, ", ");
+        }
+    }
+    strcat(buffer, " }");
+    return ESP_OK;
+}