8c24d921b0
sample: examples\aliyun_iotkit_csdk_mqtt project: board\TencentOS_tiny_EVB_MX_Plus\KEIL\aliyun_iotkit_csdk_mqtt
180 lines
5.2 KiB
C
180 lines
5.2 KiB
C
/*
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* Copyright (C) 2015-2018 Alibaba Group Holding Limited
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*/
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#ifndef _INFRA_JSON_PARSER_H_
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#define _INFRA_JSON_PARSER_H_
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/* #include "iotx_utils_internal.h" */
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typedef struct JSON_NV {
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int nLen;
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int vLen;
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int vType;
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char *pN;
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char *pV;
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} JSON_NV;
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/**
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The descriptions of the json value node type
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**/
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enum JSONTYPE {
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JNONE = -1,
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JSTRING = 0,
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JOBJECT,
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JARRAY,
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JNUMBER,
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JBOOLEAN,
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JTYPEMAX
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};
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/**
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The error codes produced by the JSON parsers
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**/
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enum JSON_PARSE_CODE {
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JSON_PARSE_ERR,
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JSON_PARSE_OK,
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JSON_PARSE_FINISH
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};
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/**
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The return codes produced by the JSON parsers
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**/
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enum JSON_PARSE_RESULT {
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JSON_RESULT_ERR = -1,
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JSON_RESULT_OK
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};
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typedef int (*json_parse_cb)(char *p_cName, int iNameLen, char *p_cValue, int iValueLen, int iValueType,
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void *p_Result);
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/**
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* @brief Parse the JSON string, and iterate through all keys and values,
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* then handle the keys and values by callback function.
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*
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* @param[in] p_cJsonStr @n The JSON string
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* @param[in] iStrLen @n The JSON string length
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* @param[in] pfnCB @n Callback function
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* @param[out] p_CBData @n User data
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* @return JSON_RESULT_OK success, JSON_RESULT_ERR failed
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* @see None.
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* @note None.
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**/
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int json_parse_name_value(char *p_cJsonStr, int iStrLen, json_parse_cb pfnCB, void *p_CBData);
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/**
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* @brief Get the value by a specified key from a json string
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*
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* @param[in] p_cJsonStr @n the JSON string
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* @param[in] iStrLen @n the JSON string length
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* @param[in] p_cName @n the specified key string
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* @param[out] p_iValueLen @n the value length
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* @param[out] p_iValueType @n the value type
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* @return A pointer to the value
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* @see None.
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* @note None.
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**/
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char *json_get_value_by_name(char *p_cJsonStr, int iStrLen, char *p_cName, int *p_iValueLen, int *p_iValueType);
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/**
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* @brief Get the value by a specified key from a json string
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*
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* @param[in] p_cJsonStr @n the JSON string
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* @param[in] iStrLen @n the JSON string length
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* @param[in] p_cName @n the specified key string
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* @param[in] p_cNameLen @n the specified key string length
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* @param[out] p_iValueLen @n the value length
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* @param[out] p_iValueType @n the value type
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* @return A pointer to the value
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* @see None.
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* @note None.
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**/
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char *json_get_value_by_name_len(char *p_cJsonStr, int iStrLen, char *p_cName, int p_cNameLen, int *p_iValueLen,
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int *p_iValueType);
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/**
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* @brief Get the JSON object point associate with a given type.
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*
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* @param[in] type @n The object type
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* @param[in] str @n The JSON string
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* @param[in] str_end @n The end point of Json string
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* @returns The json object point with the given field type.
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* @see None.
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* @note None.
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*/
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char *json_get_object(int type, char *str, char *str_end);
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char *json_get_next_object(int type, char *str, char *str_end, char **key, int *key_len, char **val, int *val_len,
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int *val_type);
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/**
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* @brief retrieve each key&value pair from the json string
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*
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* @param[in] str @n Json string to revolve
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* @param[in] slen @n The length of json string
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* @param[in] pos @n cursor
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* @param[out] key @n pointer to the next Key object
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* @param[out] klen @n Key object length
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* @param[out] val @n pointer to the next Value object
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* @param[out] vlen @n Value object length
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* @param[out] vtype @n Value object type(digital, string, object, array)
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* @see None.
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* @note None.
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*/
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#define json_object_for_each_kv(str, slen, pos, key, klen, val, vlen, vtype) \
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for (pos = json_get_object(JOBJECT, str, str + slen); \
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pos != NULL && *pos!= 0 && (pos=json_get_next_object(JOBJECT, pos, str + slen , &key, &klen, &val, &vlen, &vtype))!=0; )
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/**
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* @brief retrieve each entry from the json array
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*
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* @param[in] str @n Json array to revolve
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* @param[in] slen @n the length of Json array
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* @param[in] pos @n cursor
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* @param[out] entry @n pointer to the next entry from the array
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* @param[out] len @n entry length
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* @param[out] type @n entry type(digital, string, object, array)
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* @see None.
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* @note None.
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*/
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#define json_array_for_each_entry(str, slen, pos, entry, len, type) \
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for (pos = json_get_object(JARRAY, str, str + slen); \
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pos != NULL && *pos!= 0 && (pos=json_get_next_object(JARRAY, ++pos, str + slen, 0, 0, &entry, &len, &type))!=0; )
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/**
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* @brief backup the last character to register parameters,
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* and set the end character with '\0'
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*
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* @param[in] json_str @n json string
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* @param[in] str_len @n json string lenth
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* @param[out] register @n used to backup the last character
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* @see None.
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* @note None.
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*/
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#define backup_json_str_last_char(json_str, str_len, register) { \
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register = *((char *)json_str + str_len); \
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*((char *)json_str + str_len) = '\0'; \
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}
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/**
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* @brief restore the last character from register parameters
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*
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* @param[in] json_str @n json string
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* @param[in] str_len @n json string lenth
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* @param[in] register @n used to restore the last character
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* @see None.
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* @note None.
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*/
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#define restore_json_str_last_char(json_str, str_len, register) { \
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*((char *)json_str + str_len) = register; \
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}
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char *LITE_json_value_of(char *key, char *src, ...);
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#endif /* __JSON_PARSER_H__ */
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