C语言读写配置文件的方法

本文实例讲述了C语言读写配置文件的方法。分享给大家供大家参考。具体如下：

CException.h如下：

/************************************************************************/
/*       make0000@msn.com   */
/************************************************************************/
/************************************************************************/
#include "stdio.h"
#include "conio.h"
#include "signal.h"
#include "setjmp.h"
#include "assert.h"
#ifdef __cplusplus
  #include "iostream"
  #include "exception"
  extern "C"{
    #define dllexport __declspec(dllexport)
    jmp_buf Jmp_Buf;
    int E;
    #define Exception 0x00000
    #define e Exception
    #define try if(!(E=setjmp(Jmp_Buf)))
    #define last_error() E
    #define catch(val) else
    #define throw(val) longjmp(Jmp_Buf,val)
    #define check(expersion) assert(expersion)
    #define GetError() errno
    dllexport void sig_usr(int);
    dllexport char* getTime();
  }
#else
  #define dllexport __declspec(dllexport)
  jmp_buf Jmp_Buf;
  int E;
  #define Exception 0x00000
  #define e Exception
  #define try if(!(E=setjmp(Jmp_Buf)))
  #define last_error() E
  #define catch(val) else
  #define throw(val) longjmp(Jmp_Buf,val)
  #define check(expersion) assert(expersion)
  #define GetError() errno
  dllexport void sig_usr(int);
  dllexport char* getTime();
#endif

File.h如下：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <windows.h>
#define SIZE 128
#include "CException.h"
#define export __declspec(dllexport)
//读取配置文件.
int read_file(char* filename,char* key,char* value);
//写配置文件.
int write_file(char* filename,char* key,char* value);
//释放文件.
int release();
//写入节.
int write_section(char* filename,char* section);
int read_section(char* filename);
int getAuthor(char* value);
void getVersion(char* value);

File.c如下：

#include "File.h"
#include <string.h>
int read_file(char* filename,char* key,char* value)
{
 int flag=0;
 char buffer[SIZE];
 FILE *file=fopen(filename,"r");
 try
 {
  if(file==NULL)
  {
  flag=1;
  throw(flag);
  }
  else
  {
  while(fgets(buffer,SIZE,file)!=NULL)
  {
   int i=0,j=0,len=strlen(key);
   while(buffer[i]!='\0')
   {
    if(buffer[i]=='$'&&buffer[i+len+1]=='=')
    {
    j=i+len+2;
     while(buffer[j]!='\0'&&buffer[j]!=';')
     {
     int h=0;
     if(buffer[i+1]==key[i])
     {
      //printf("%c",buffer[j]);
      value[j-i-len-2]=buffer[j];
     }
     j++;
     }
    break;
    }
    else if(buffer[i]=='/'&&buffer[i+1]=='/'||buffer[i]==';')
    {
    break;
    //comment
    }
   i++;
   }
  }
  }
 }
 catch(Exception)
 {
  flag=2;
  fclose(file);
  printf("can't open file %s",filename);
  exit(1);
 }
 fflush(file);
 fclose(file);
 return flag;
}
int write_file(char* filename,char* key,char* value)
{
 int flag=0;
 FILE* file;
 file=fopen(filename,"a");
 try
 {
 if(file==NULL)
 {
 flag=1;
 throw(flag);
 }
 fprintf(file,"$%s=%s\n",key,value);
 }
 catch(Exception)
 {
 printf("Can't write file %s",filename);
 exit(1);
 }
 fflush(file);
 fclose(file);
 return flag;
}
int write_section(char* filename,char* section)
{
 int flag=0;
 FILE* file=NULL;
 try
 {
 file=fopen(filename,"a");
 if(file!=NULL)
 {
  fprintf(file,"[%s]\n",section);
 }
 else
 {
  int flag=1;
  throw(flag);
 }
 }
 catch(Exception)
 {
 printf("can't open file %s",filename);
 exit(0);
 }
 fflush(file);
 fclose(file);
 return flag;
}
int release()
{
 int flag=1;
 return flag;
}
int read_section(char* filename)
{
 return 0;
}
int getAuthor(char* value)
{
 char author[128]="武汉软件工程职业学院计算机应用系";
 int i=0;
 for(i=0;i<strlen(author);i++)
 {
 value[i]=author[i];
 }
 return 0;
}
void getVersion(char* value)
{
 char version[128]="2009//05//01";
 int i=0;
 for(i=0;i<strlen(version);i++)
 {
 value[i]=version[i];
 }
}
/**************************************************************************
void main()
{
 char* str=NULL;
 char author[120];
 char buffer[128];
 char buffer1[128];
 char buffer2[128];
 read_file("F:\\exercise\\C++!C\\sys.ini","password",buffer);
 read_file("F:\\exercise\\C++!C\\sys.ini","username",buffer1);
 read_file("F:\\exercise\\C++!C\\sys.ini","driver",buffer2);
 printf("password=%s\n",buffer);
 printf("\n");
 printf("username=%s\n",buffer1);
 printf("\n");
 printf("driver=%s\n",buffer2);
 getAuthor(author);
 printf("\n");
 printf("author=%s",author);
 release();
}

希望本文所述对大家的C语言程序设计有所帮助。