C语言读取写入ini配置文件的方法实现

[Setting]
INIT_FLAG=0;
VOLUME=1;
LANGUAGE=1;

#ifndef INI_H
#define INI_H

#include <stdio.h>  
#include <string.h>

int GetIniKeyString(char *title,char *key,char *filename,char *buf);

int PutIniKeyString(char *title,char *key,char *val,char *filename);

#endif 

#include <stdio.h>  
#include <string.h>        
  
int GetIniKeyString(char *title,char *key,char *filename,char *buf)  
{  
    FILE *fp;  
    int  flag = 0;  
    char sTitle[64], *wTmp;
    char sLine[1024];        
    sprintf(sTitle, "[%s]", title);
                     
    if(NULL == (fp = fopen(filename, "r"))) {  
        perror("fopen");  
        return -1;
    }
    while (NULL != fgets(sLine, 1024, fp)) {  
        // 这是注释行  
        if (0 == strncmp("//", sLine, 2)) continue;  
        if ('#' == sLine[0])              continue;        
        wTmp = strchr(sLine, '=');  
        if ((NULL != wTmp) && (1 == flag)) {  
            if (0 == strncmp(key, sLine, strlen(key))) { // 长度依文件读取的为准  
                sLine[strlen(sLine) - 1] = '\0';  
                fclose(fp);
                while(*(wTmp + 1) == ' '){
                    wTmp++;
                }
                strcpy(buf,wTmp + 1);
                return 0;  
            }  
        } else {  
            if (0 == strncmp(sTitle, sLine, strlen(sTitle))) { // 长度依文件读取的为准  
                flag = 1; // 找到标题位置  
            }  
        }  
    }  
    fclose(fp);  
    return -1;  
}        
      
  
int PutIniKeyString(char *title,char *key,char *val,char *filename)  
{  
    FILE *fpr, *fpw;  
    int  flag = 0;  
    char sLine[1024], sTitle[32], *wTmp;        
    sprintf(sTitle, "[%s]", title);  
    if (NULL == (fpr = fopen(filename, "r")))  
        return -1;// 读取原文件  
    sprintf(sLine, "%s.tmp", filename);  
    if (NULL == (fpw = fopen(sLine,    "w")))  
        return -1;// 写入临时文件        
    while (NULL != fgets(sLine, 1024, fpr)) {  
        if (2 != flag) { // 如果找到要修改的那一行，则不会执行内部的操作  
            wTmp = strchr(sLine, '=');  
            if ((NULL != wTmp) && (1 == flag)) {  
                if (0 == strncmp(key, sLine, strlen(key))) { // 长度依文件读取的为准 
                    flag = 2;// 更改值，方便写入文件  
                    sprintf(wTmp + 1, " %s\n", val);
                }  
            } else {
                if (0 == strncmp(sTitle, sLine, strlen(sTitle))) { // 长度依文件读取的为准
                    flag = 1; // 找到标题位置  
                }  
            }  
        }        
        fputs(sLine, fpw); // 写入临时文件 
    }  
    fclose(fpr);  
    fclose(fpw);        
    sprintf(sLine, "%s.tmp", filename);  
    return rename(sLine, filename);// 将临时文件更新到原文件  
}

[city]
beijing =  hello-beijing
shanghai = hello-shanghai


#infORMation
[study]
highschool = xxxx
university = yyyy

#include "ini.h"
#include <stdio.h>
int main(int arGC, char const *argv[])
{
    char buff[100];
    int ret;

    ret = GetIniKeyString("city","beijing","./test.ini",buff);
    printf("ret:%d,%s\n",ret,buff);

    ret = GetIniKeyString("study","highschool","./test.ini",buff);
    printf("ret:%d,%s\n",ret,buff);

    ret = PutIniKeyString("study","highschool","zzzz","./test.ini");
    printf("put ret:%d\n",ret);
    ret = GetIniKeyString("study","highschool","./test.ini",buff);
    printf("ret:%d,%s\n",ret,buff);
    return 0;
}