Diff: aws-iot/src/aws_iot_json_utils.cpp

Revision:

0:cd5404401c2f

Child:

2:db59f45ad3d3

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/aws-iot/src/aws_iot_json_utils.cpp	Wed Apr 12 14:07:09 2017 +0200
@@ -0,0 +1,204 @@
+/*
+ * Copyright 2010-2015 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *  http://aws.amazon.com/apache2.0
+ *
+ * or in the "license" file accompanying this file. This file 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.
+ */
+
+/**
+ * @file aws_json_utils.c
+ * @brief Utilities for manipulating JSON
+ *
+ * json_utils provides JSON parsing utilities for use with the IoT SDK.
+ * Underlying JSON parsing relies on the Jasmine JSON parser.
+ *
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "aws_iot_json_utils.h"
+
+#include <stdio.h>
+#include <stdint.h>
+#include <string.h>
+
+#ifdef __cplusplus
+#include <cinttypes>
+#else
+
+#include <inttypes.h>
+
+#endif
+
+#include "aws_iot_log.h"
+
+int8_t jsoneq(const char *json, jsmntok_t *tok, const char *s) {
+	if(tok->type == JSMN_STRING) {
+		if((int) strlen(s) == tok->end - tok->start) {
+			if(strncmp(json + tok->start, s, (size_t) (tok->end - tok->start)) == 0) {
+				return 0;
+			}
+		}
+	}
+	return -1;
+}
+
+IoT_Error_t parseUnsignedInteger32Value(uint32_t *i, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not an integer");
+		return JSON_PARSE_ERROR;
+	}
+
+	if(('-' == (char) (jsonString[token->start])) || (1 != sscanf(jsonString + token->start, "%lu", i))) {
+		IOT_WARN("Token was not an unsigned integer.");
+		return JSON_PARSE_ERROR;
+	}
+
+	return SUCCESS;
+}
+
+IoT_Error_t parseUnsignedInteger16Value(uint16_t *i, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not an integer");
+		return JSON_PARSE_ERROR;
+	}
+
+	//if(('-' == (char) (jsonString[token->start])) || (1 != sscanf(jsonString + token->start, "%" SCNu16, i))) {
+	if(('-' == (char) (jsonString[token->start])) || (1 != sscanf(jsonString + token->start, "%hu", i))) {
+		IOT_WARN("Token was not an unsigned integer.");
+		return JSON_PARSE_ERROR;
+	}
+
+	return SUCCESS;
+}
+
+IoT_Error_t parseUnsignedInteger8Value(uint8_t *i, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not an integer");
+		return JSON_PARSE_ERROR;
+	}
+
+	//if(('-' == (char) (jsonString[token->start])) || (1 != sscanf(jsonString + token->start, "%" SCNu8, i))) {
+	if(('-' == (char) (jsonString[token->start])) || (1 != sscanf(jsonString + token->start, "%hhu", i))) {
+		IOT_WARN("Token was not an unsigned integer.");
+		return JSON_PARSE_ERROR;
+	}
+
+	return SUCCESS;
+}
+
+IoT_Error_t parseInteger32Value(int32_t *i, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not an integer");
+		return JSON_PARSE_ERROR;
+	}
+
+	if(1 != sscanf(jsonString + token->start, "%li", i)) {
+		IOT_WARN("Token was not an integer.");
+		return JSON_PARSE_ERROR;
+	}
+
+	return SUCCESS;
+}
+
+IoT_Error_t parseInteger16Value(int16_t *i, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not an integer");
+		return JSON_PARSE_ERROR;
+	}
+
+	if(1 != sscanf(jsonString + token->start, "%i", i)) {
+		IOT_WARN("Token was not an integer.");
+		return JSON_PARSE_ERROR;
+	}
+
+	return SUCCESS;
+}
+
+IoT_Error_t parseInteger8Value(int8_t *i, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not an integer");
+		return JSON_PARSE_ERROR;
+	}
+
+	//if(1 != sscanf(jsonString + token->start, "%" SCNi8, i)) {
+	if(1 != sscanf(jsonString + token->start, "%hhi", i)) {
+		IOT_WARN("Token was not an integer.");
+		return JSON_PARSE_ERROR;
+	}
+
+	return SUCCESS;
+}
+
+IoT_Error_t parseFloatValue(float *f, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not a float.");
+		return JSON_PARSE_ERROR;
+	}
+
+	if(1 != sscanf(jsonString + token->start, "%f", f)) {
+		IOT_WARN("Token was not a float.");
+		return JSON_PARSE_ERROR;
+	}
+
+	return SUCCESS;
+}
+
+IoT_Error_t parseDoubleValue(double *d, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not a double.");
+		return JSON_PARSE_ERROR;
+	}
+
+	if(1 != sscanf(jsonString + token->start, "%lf", d)) {
+		IOT_WARN("Token was not a double.");
+		return JSON_PARSE_ERROR;
+	}
+
+	return SUCCESS;
+}
+
+IoT_Error_t parseBooleanValue(bool *b, const char *jsonString, jsmntok_t *token) {
+	if(token->type != JSMN_PRIMITIVE) {
+		IOT_WARN("Token was not a primitive.");
+		return JSON_PARSE_ERROR;
+	}
+	if(jsonString[token->start] == 't' && jsonString[token->start + 1] == 'r' && jsonString[token->start + 2] == 'u'
+	   && jsonString[token->start + 3] == 'e') {
+		*b = true;
+	} else if(jsonString[token->start] == 'f' && jsonString[token->start + 1] == 'a'
+			  && jsonString[token->start + 2] == 'l' && jsonString[token->start + 3] == 's'
+			  && jsonString[token->start + 4] == 'e') {
+		*b = false;
+	} else {
+		IOT_WARN("Token was not a bool.");
+		return JSON_PARSE_ERROR;
+	}
+	return SUCCESS;
+}
+
+IoT_Error_t parseStringValue(char *buf, const char *jsonString, jsmntok_t *token) {
+	uint16_t size = 0;
+	if(token->type != JSMN_STRING) {
+		IOT_WARN("Token was not a string.");
+		return JSON_PARSE_ERROR;
+	}
+	size = (uint16_t) (token->end - token->start);
+	memcpy(buf, jsonString + token->start, size);
+	buf[size] = '\0';
+	return SUCCESS;
+}
+
+#ifdef __cplusplus
+}
+#endif