Help with parsing the string

[TanyaB]

Hi all,
please help me with this issue:
My program get Oracle connect string that looks like this:
username/password@dbinstance
How can I parse it to 3 strings( username,password,instance) ?

 

[Zyrenthian]

I would look into the function strstr, that should pull it out for you. For the search string use "//" and "@"

the return value is where the character string appears. From there it is just a bit of string manipulation with strncpy and a bit of pointer arithmetic.

for example: username would look like

char* password = strstr(yourString,"//"

char username[32];
strncpy(username,yourString,password-yourString-1);

Matt

 

[shail]

how about..
char connection[100];
strcpy(connection, "username/password@dbinstance" /* some sample string */
char *username, password, dbinstance;
username = &connection[0];
password = strchr(username, '/');
*password++ =0;
dbinstance= strchr(password, '@');
*dbinstance++ =0;
thats it
-hth,
shail

 

[tschultze]

The strtok function is probably the best approach:

char *username;
char *password;
char *instance;
char yourString[500];

strcpy(yourString, passedConnectString);
username = strtok(yourString, "/@"
password = strtok(NULL, "/@"
instance = strtok(NULL, "/@"

There are a couple of caveats:

1. The contents are yourString are touched by strtok. It replaces the separators with a NULL.
2. username, password, and instance are merely pointing into the data space of yourString.
3. The code really should be checking for a return of NULL which means strtok couldn't find any more embedded separators.

 

[charan]

what do you mean by a parse error in C

 

[Leibnitz]

Try this program it should handle what you want to do elegantly !

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define  _MAXSTRING_  50

typedef char String[_MAXSTRING_];

int Tokenise( char *buff, char *sep, char tokeniseword[][_MAXSTRING_] )
{
	int i = 0, l = 0, j = 0, k = 0;
	char bkp[_MAXSTRING_];

	while( buff[i] != '\0' )
	{
       for( k = 0; sep[k] != '\0'; k++ )
	   {
	      if( buff[i] == sep[k] )
		  {
              bkp[l] = 0;
		      if( strlen( bkp ) != 0)
			  {
			     strcpy( tokeniseword[j], bkp );
                 j++;
			     l = 0;
				 bkp[0] = 0;
			  }
		  }
          else
		  {
             bkp[l] = buff[i];
             l++;
		  }
		  i++;
	   }
	}

    bkp[l] = '\0';

	if(strlen( bkp ) != 0 ) 
	{
        strcpy( tokeniseword[j], bkp );
		j++;
	}

	return j;
}

void main()
{
	char *string = &quot;username/password@dbinstance&quot;;
	char *sep = &quot;/@&quot;;
	String *token;
	int i;
	int toknum;
	token  = ( String* )malloc( sizeof(String) * 3 );
	toknum = Tokenise( string, sep, token );
	for( i = 0; i < toknum; i++ )
	{
		printf(&quot;%s&quot;,token[i]);
		if( i != toknum - 1 )
		{
			printf(&quot;,&quot;);
		}
	}
	printf(&quot;\n&quot;);
    free(token);
}