初始化

src/.vimspector.json

+{
+  "configurations": {
+    "Launch": {
+      "adapter": "vscode-cpptools",
+      "configuration": {
+        "request": "launch",
+        "program": "${fileDirname}/demo.exe",
+        "stopAtEntry": true
+      }
+    }
+  }
+}

src/mRjson.c

+/**
+ * @file mRjson.c
+ * @Synopsis  简易json解析库
+ * @author Wang Jiancong
+ * @version v0.1
+ * @date 2022-09-12
+ */
+
+#include "mRjson.h"
+#include "stdarg.h"
+#include <stdlib.h>
+#include <string.h>
+
+/* --------------------------------------------------------------------------*/
+/**
+ * @Synopsis  拷贝字符串直到遇到指定字符
+ *
+ * @Param str_dst 目标字符串
+ * @Param str_src 源字符串, 被拷贝
+ * @Param ch 指定字符
+ */
+/* --------------------------------------------------------------------------*/
+static void cpy_str(char* str_dst, char* str_src, char ch)
+{
+	while (*str_src != ch) {
+		*str_dst ++ = *str_src++;
+	}
+}
+
+/* --------------------------------------------------------------------------*/
+/**
+ * @Synopsis  按指定格式输入json字符串，键，解析目标，保存结果
+ * 				("%j,%i,%t,%r")
+ *
+ * @Param str
+ * @Param ...
+ */
+/* --------------------------------------------------------------------------*/
+void mRjson_Decode(const char *str, ...)
+{
+	va_list ap;
+
+	char* jstr;
+	char* istr;
+	char* tstr;
+
+	char* strp;
+
+	void* res = NULL;
+
+	va_start(ap, str);
+
+	for(;*str;str++)
+	{
+		if(*str == '%')
+		{
+			switch (*++str) 
+			{
+				case 'j':
+				case 'J':
+					jstr = va_arg(ap, char*);
+					break;
+				case 'i':
+				case 'I':
+					istr = va_arg(ap, char*);
+					break;
+				case 't':
+				case 'T':
+					tstr = va_arg(ap, char*);
+					break;
+				case 'r':
+				case 'R':
+					strp = strstr(jstr,istr);
+					strp += strlen(istr);
+					while (*strp == ' ' ||
+							*strp == ':' ||
+							*strp == '"') 
+					{
+						strp ++;
+					}
+
+					switch (*tstr) {
+						case 'd':
+						case 'D':
+							res = va_arg(ap, int*);
+							*(int*)res = atoi(strp);
+							break;
+						case 'f':
+						case 'F':
+							res = va_arg(ap, double*);
+							*(double*)res = atof(strp);
+							break;
+						case 's':
+						case 'S':
+							res = va_arg(ap, char*);
+							cpy_str(res, strp, '"');
+							/*strtok(strp,"\"");*/
+							/*strcpy(res,strp);*/
+							break;
+					}
+					break;
+			}
+		}
+	}
+	va_end(ap);
+}
+
+
+
+

src/mRjson.h

+/**
+ * @file mRjson.c
+ * @Synopsis  简易json解析库
+ * @author Wang Jiancong
+ * @version v0.1
+ * @date 2022-09-12
+ */
+#ifndef _mRjson_h
+#define _mRjson_h
+
+
+void mRjson_Decode(const char *str, ...);
+
+#endif
+
+

src/makefile

+tar=demo
+
+obj=test.o mRjson.o
+CC=gcc
+CFLAGS=-c -Wall -g
+
+$(tar):$(obj)
+	$(CC) $^ -o $(tar)
+
+%.o:%.c 
+	$(CC) $^ $(CFLAGS) -o $@
+
+clean:
+	$(RM) *.o $(tar) -r

src/test.c

+/**
+ * @file mRjson.c
+ * @Synopsis  简易json解析库
+ * @author Wang Jiancong
+ * @version v0.1
+ * @date 2022-09-12
+ */
+
+#include <stdio.h>
+#include "mRjson.h"
+
+
+char json[] = "{\"size\":1,\"str\":\"hello\",\"double\":3.14}";
+
+char ss[100] = "nihao";
+
+int main(void)
+{
+	int tmp;
+	double ftmp;
+	printf("json: %s\r\n\r\n",json);
+
+	mRjson_Decode("%J%I%T%R",json,"size","D",&tmp);
+	printf("res 1: %d\r\n", tmp);
+
+	mRjson_Decode("%J%I%T%R",json,"str","S",&ss[0]);
+	printf("res 2: %s\r\n", ss);
+
+	mRjson_Decode("%J%I%T%R",json,"double","F",&ftmp);
+	printf("res 3: %f\r\n", ftmp);
+
+	printf("json: %s\r\n\r\n",json);
+	return 0;
+}
+
+
+
+
+
+
+