window下C语言实现读取config.ini配置文件

 

#include <stdio.h>#include <string.h>#pragma warning(disable:4996)/** 函数名：GetIniKeyString* 入口参数：title*配置文件中一组数据的标识*key*这组数据中要读出的值的标识*filename*要读取的文件路径* 返回值：找到需要查的值则返回正确结果*否则返回NULL*/char *GetIniKeyString(char *title, char *key, char *filename){FILE *fp=NULL;int  flag = 0;char sTitle[32], *wTmp;static char sLine[1024];sprintf(sTitle, "[%s]", title);if (NULL == (fp = fopen(filename, "r"))) {fclose(fp);perror("fopen");return NULL;}else {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, wTmp - sLine)) { // 长度依文件读取的为准sLine[strlen(sLine) - 1] = '\0';fclose(fp);return wTmp + 1;}}else {if (0 == strncmp(sTitle, sLine, strlen(sLine) - 1)) { // 长度依文件读取的为准flag = 1; // 找到标题位置}}}}fclose(fp);return NULL;}/** 函数名：GetIniKeyInt* 入口参数：title*配置文件中一组数据的标识*key*这组数据中要读出的值的标识*filename*要读取的文件路径* 返回值：找到需要查的值则返回正确结果*否则返回NULL*/int GetIniKeyInt(char *title, char *key, char *filename){return atoi(GetIniKeyString(title, key, filename));}/** 函数名：PutIniKeyString* 入口参数：title*配置文件中一组数据的标识*key*这组数据中要读出的值的标识*val*更改后的值*filename*要读取的文件路径* 返回值：成功返回  0*否则返回 -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"))) {fclose(fpr);perror("fopen");return NULL;}sprintf(sLine, "%s.tmp", filename);if (NULL == (fpw = fopen(sLine, "w"))){fclose(fpw);perror("fopen");return NULL;}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, wTmp - sLine)) { // 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(sLine) - 1)) { // 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}/** 函数名：PutIniKeyString* 入口参数：title*配置文件中一组数据的标识*key*这组数据中要读出的值的标识*val*更改后的值*filename*要读取的文件路径* 返回值：成功返回  0*否则返回 -1*/int PutIniKeyInt(char *title, char *key, int val, char *filename){char sVal[32];sprintf(sVal, "%d", val);return PutIniKeyString(title, key, sVal, filename);}int main(int argc, char *argv[]){printf("%s\n", GetIniKeyString("DOG", "name", "config.ini"));printf("%d\n", GetIniKeyInt("DOG", "age", "config.ini")); PutIniKeyInt("DOG", "age", 56, "config.ini");system("pause");return 0;}