JSON解析接口-C

#include <stdio.h>
#include <string.h>#define uint8_t unsigned char
#define uint32_t unsigned int
#define uint16_t unsigned short//根据实际模块来
#define REV_D  "+IPD"  
#define FUN_PAR_OVERFLOW 0xff
//将数组/指针中为0x00的字段全部变成空格号
void buf_clear_0(uint8_t *data, uint8_t lenth)
{int i=0;for(i=0; i<lenth; i++ ){if(data[i] == '\0'){data[i] = ' ';}}	
}
//查询字符在字符串位置函数
uint8_t find_char_len(uint8_t *str, uint8_t c,uint16_t len)
{int i=0;for(i=0; i<len; i++){if(str[i] == c){return i;}}printf("FUN_PAR_OVERFLOW \r\n");return FUN_PAR_OVERFLOW;
}
//解析命令数据
/*
cmd :解析的命令， 
data:原数据，
rev_data:解析得到的数组 
rev_data_len:数组长度
blank_on:json字段是否有空格
str_on:是否是字符串(有双引号就是字符串)
*/
uint8_t decode_cmd_data(uint8_t *cmd, uint8_t * data, uint8_t* rev_data,int rev_data_len, uint8_t blank_on, uint8_t str_on)
{char * tar_str=NULL;int cmd_len=0;char blank_len=2;uint32_t val;//如果没有空格if(blank_on == 1){blank_len++; }if(str_on == 1){blank_len++; }tar_str  = (char *)strstr((char *)data, cmd);if(tar_str != NULL){tar_str = &tar_str[strlen(cmd) + blank_len];//字符串if(str_on == 1){cmd_len = find_char_len((uint8_t *)tar_str,'"',rev_data_len);if(cmd_len == FUN_PAR_OVERFLOW){    return ;}memcpy(rev_data,tar_str,cmd_len); }else{val = atoi(tar_str);memcpy(rev_data,&val,4); }//printf("ok\r\n");return 1; //成功}else{printf("err\r\n");return 0; //失败}}//解析json-解析命令
void decode_cmd(uint8_t *data)
{uint8_t file_name[50]={0};uint8_t file_ver[20]={0};uint8_t file_size[20]={0};uint8_t file_checksum[64]={0};uint32_t dat_num=0;if(strstr(data,"START_UPGRADE")){//printf("have dat\r\n");//printf("%s\r\n",data);decode_cmd_data("file_name",data,file_name,sizeof(file_name),1,1);decode_cmd_data("version",data,file_ver,sizeof(file_ver),1,1);decode_cmd_data("file_size",data,file_size,sizeof(file_size),1,1);decode_cmd_data("checksum_check",data,file_checksum,sizeof(file_checksum),1,1);decode_cmd_data("data_num",data,&dat_num,sizeof(dat_num),0,0);}printf("file_name: %s\r\n", file_name);printf("version: %s\r\n", file_ver);printf("file_size: %s\r\n", file_size);printf("checksum_check: %s\r\n", file_checksum);printf("dat_num:%d\r\n", dat_num);}
//解析json-初步解析
void decode_json(uint8_t * data)
{uint8_t *str;str  = strstr(data,REV_D);if(str != NULL){buf_clear_0(str,15);decode_cmd(str);}
}char buf[] = "+IPD: receive:WBS-MYD-V10-00000001\
{\\"cmd\": \"START_UPGRADE\",\\"data\": {\\"version\": \"1.0\",\\"file_name\": \"V1.0.0.bin\",\\"file_size\": \"128537\",\\"checksum_check\": \"67f3b40ba0cbb7d289a9cf6f3f75e6c319f12bdc82d5c35\",\\"data_num\":132466\}\
}";int main()
{decode_json(buf);return 0;}