pub_file.c

自已结累的Unix下C语言开发函数库

/*
 * Program Name : pub_File.c                                       
 * Description  : 文件操作相关函数                                 
 * Create Date  : 2004-08-31                                         
 * Author       : shilyu                                             
 *functionnum 006
 */

#include "./../inc/pub.h"

#define STR_BUF_LEN  1024

/* 001
 *读配置文件(去掉空格)
 */
int GetFileString ( FileName , Section, Key , KeyValue)
char *FileName ;
char *Section ;
char *Key ;
char *KeyValue ;
{
   FILE *fp                          ;
   char buf          [ STR_BUF_LEN ] ; 
   char key          [ STR_BUF_LEN ] ;
   char tmp_keyvalue [ STR_BUF_LEN ] ;
   int  i                            ;

   /* Open file */
   if ( ( fp = fopen ( FileName , "r" ) ) == NULL )
   {
   	
#ifdef DEBUG
      fprintf ( stderr, "Can't open file:%s\n" , FileName ) ;
#endif

      return ( -1 ) ;
   }

   /* Find section */
   while ( 1 )
   {
      memset ( buf , 0 , STR_BUF_LEN ) ;

      if ( feof ( fp ) || fgets ( buf , STR_BUF_LEN , fp ) == ( char * ) NULL )
      {
	      fclose ( fp ) ;
	      fprintf ( stderr , "Can't find section:%s\n" , Section ) ;
	      return ( -1 ) ;
      }

      if ( buf [ 0 ] = '[' &&
           strncmp ( Section , buf + 1 , strlen ( Section ) ) == 0 &&
           buf [ strlen ( Section ) + 1 ] == ']' )
	      break ;
   }

   /* Find Key */
   while ( 1 )
   {
      memset ( buf , 0 , STR_BUF_LEN ) ;

      if ( feof ( fp ) || 
           fgets ( buf , STR_BUF_LEN , fp ) == ( char * ) NULL || 
           buf [ 0 ] == '[' ) 
      {
	      fclose ( fp ) ;
	      fprintf ( stderr , "Can't find key:%s\n" , Key ) ;
	      return ( -1 ) ;
      }

      /* Check '=' */
      for ( i = 0 ; i < strlen ( buf ) && buf [i] != '=' ; i++ )
         ;
      if ( i < strlen ( buf ) )
      {
         memset ( key , 0x00 , STR_BUF_LEN ) ;
         strncpy ( key , buf , i ) ;
         StrTrim ( key , 'A' ) ;
         if ( strcmp ( key , Key ) == 0 )
	         break ;       /* while */
      }
   }

   /* Return */
   fclose ( fp ) ;
   StrTrim ( buf , 'R' ) ;
   strcpy ( tmp_keyvalue , buf + i + 1 ) ;
   if ( tmp_keyvalue [ strlen ( tmp_keyvalue ) - 1 ] = '\n' )
      tmp_keyvalue [ strlen ( tmp_keyvalue ) - 1 ] = 0x00 ;
   StrTrim ( tmp_keyvalue , 'A' ) ;
   strcpy ( KeyValue , tmp_keyvalue ) ;


   return ( 0 ) ;
}

/* 002
 * 从文件当前位置开始找到节在文件中的起始位置
 * 返回行数
 */
int FindSection ( fp , Section ) 
FILE *fp ;
char *Section ;
{
   char buf [ STR_BUF_LEN ] ;
   int  i = 0 ;

   /* Find section */
   while ( 1 )
   {
      memset ( buf , 0 , STR_BUF_LEN ) ;
      if ( feof ( fp ) ) 
      {
#ifdef DEBUG
         fprintf ( stderr , "feof Can't find section:%s\n" , Section ) ;
#endif
         return ( -1 ) ;
      }

      if( fgets ( buf , STR_BUF_LEN , fp ) == ( char * ) NULL )
      {
#ifdef DEBUG
         fprintf ( stderr , "is null Can't find section:%s\n" , Section ) ;
#endif
         return ( -1 ) ;
      }

      i++ ;
      if ( buf [ 0 ] = '[' &&
           strncmp ( Section , buf + 1 , strlen ( Section ) ) == 0 &&
           buf [ strlen ( Section ) + 1 ] == ']' )
         break ;
   }

   return ( i ) ;
}

/* 003
 * 计算某一起始节到下一节之间的行数 
 */
int GetLinesBetweenSection ( fp , StartSection , EndSection )
FILE *fp ;
char *StartSection ;
char *EndSection ;
{
    int line1 , line2 , line ;

    rewind ( fp ) ;
    line1 = FindSection ( fp , EndSection ) ;
    if ( line1 < 0 ) return ( 0 ) ;

    rewind ( fp ) ;
    line2 = FindSection ( fp , StartSection ) ;
    if ( line2 < 0 ) return ( 0 ) ;

    line = line1 - line2 ;

    return ( ( line > 0 ) ? ( line - 1 ) : 0 ) ;
}

/* 004
 * 获得某一起始节到下一节之间的最宽列的宽度
 */
int GetMaxWidthBetweenSection ( fp , StartSection , EndSection )
FILE *fp ;
char *StartSection ;
char *EndSection ;
{
    int  MaxCol ,                 /* 最大列 */
         Lines ,                  /* 两节之间的行数 */
         i ;                      /* 循环控制变量   */
    char rbuf [ STR_BUF_LEN ] ;
 

    /* 初始化最大列数 */
    MaxCol = 0 ;

    /* 取得两节之间的行数 */
    rewind ( fp ) ;
    Lines   = GetLinesBetweenSection ( fp , StartSection , EndSection ) ;

    /* 计算两节之间最宽列数 */
    if ( Lines != 0 )
    {
       rewind ( fp ) ;
       FindSection ( fp , StartSection ) ; /*将文件指针定位到第一个节点处*/

	    for ( i = 0  ; i < Lines ; i++ )
	    {
	       fgets ( rbuf , STR_BUF_LEN , fp ) ;
	       if ( strlen ( rbuf ) > MaxCol ) 
          MaxCol = strlen ( rbuf ) ;
	    }
    }

    return ( MaxCol ) ;
}

/* 005
 *读配置文件(去掉空格)
 */
int GetFileStringNoTail ( FileName , Section, Key , KeyValue)
char *FileName ;
char *Section ;
char *Key ;
char *KeyValue ;
{
   FILE *fp ;
   char buf [ STR_BUF_LEN ] , 
        key [ STR_BUF_LEN ] , 
        tmp_keyvalue [ STR_BUF_LEN ] ;
   int  i ;

   /* Open file */
   if ( ( fp = fopen ( FileName , "r" ) ) == NULL )
   {
#ifdef DEBUG
      fprintf ( stderr, "Can't open file:%s\n" , FileName ) ;
#endif
      return ( -1 ) ;
   }

   /* Find section */
   while ( 1 )
   {
      memset ( buf , 0 , STR_BUF_LEN ) ;

      if ( feof ( fp ) || fgets ( buf , STR_BUF_LEN , fp ) == ( char * ) NULL )
      {
	 fclose ( fp ) ;
	 fprintf ( stderr , "Can't find section:%s\n" , Section ) ;
	 return ( -1 ) ;
      }

      if ( buf [ 0 ] = '[' &&
           strncmp ( Section , buf + 1 , strlen ( Section ) ) == 0 &&
           buf [ strlen ( Section ) + 1 ] == ']' )
	 break ;
   }

   /* Find Key */
   while ( 1 )
   {
      memset ( buf , 0 , STR_BUF_LEN ) ;

      if ( feof ( fp ) || 
           fgets ( buf , STR_BUF_LEN , fp ) == ( char * ) NULL || 
           buf [ 0 ] == '[' ) 
      {
	 fclose ( fp ) ;
	 fprintf ( stderr , "Can't find key:%s\n" , Key ) ;
	 return ( -1 ) ;
      }

      /* Check '=' */
      for ( i = 0 ; i < strlen ( buf ) && buf [i] != '=' ; i++ )
         ;
      if ( i < strlen ( buf ) )
      {
         memset ( key , 0x00 , STR_BUF_LEN ) ;
         strncpy ( key , buf , i ) ;
         StrTrim ( key , 'A' ) ;
         if ( strcmp ( key , Key ) == 0 )
	    break ;       /* while */
      }
   }

   /* Return */
   fclose ( fp ) ;
   /*
   StrTrim ( buf , 'R' ) ;
   */
   strcpy ( tmp_keyvalue , buf + i + 1 ) ;
   if ( tmp_keyvalue [ strlen ( tmp_keyvalue ) - 1 ] = '\n' )
      tmp_keyvalue [ strlen ( tmp_keyvalue ) - 1 ] = 0x00 ;
   /*
   StrTrim ( tmp_keyvalue , 'A' ) ;
   */
   memcpy ( KeyValue , tmp_keyvalue, strlen( tmp_keyvalue ) ) ;

   return ( 0 ) ;
}

/* 006
 *改变文件的权限
 */
void FileChmod ( char *FileName, mode_t Mode_t )  /* mode_t == usigned int */
{
   chmod ( FileName , Mode_t ) ;
}