How to get data between 2 delimiters using strtok

[prashant252]

i'm using strtok function to read a file....
but it does not give correct output if the delimiter is without any value in between..
example ~ is my delimiter..
and text file line is-
data1~data2~data3~~data4
strtok function will not give me NULL value between 2 delimiter tht is data3~~data4
Please help me to read this null char also .... and parse the line properly..

[Savage]

i'm using strtok function to read a file....
but it does not give correct output if the delimiter is without any value in between..
example ~ is my delimiter..
and text file line is-
data1~data2~data3~~data4
strtok function will not give me NULL value between 2 delimiter tht is data3~~data4
Please help me to read this null char also .... and parse the line properly..

Hi,

what is the purpose of using double delimiter beetwen 2 data's?

Please, can u explain liitle better ur problem?

[AdrianH]

i'm using strtok function to read a file....
but it does not give correct output if the delimiter is without any value in between..
example ~ is my delimiter..
and text file line is-
data1~data2~data3~~data4
strtok function will not give me NULL value between 2 delimiter tht is data3~~data4
Please help me to read this null char also .... and parse the line properly..

Sorry, strtok() will run all delimiters that it encounters together and process it as one.

Try using these:

// read in a token
scanf("%<bufferSize>[^~]", buffer);
 
// ignore \n\r chars
scanf("%*[\r\n]");
 
// read in a char
getchar();
 

or others like them (see scanf and related functions). <bufferSize> is to be replace with a number indicating the buffers size. Remeber to check the return value.

Adrian

[AdrianH]

Sorry, strtok() will run all delimiters that it encounters together and process it as one.

Try using these:

// read in a token
scanf("%<bufferSize>[^~]", buffer);
 
// ignore \n\r chars
scanf("%*[\r\n]");
 
// read in a char
getchar();
 

or others like them (see scanf and related functions). <bufferSize> is to be replace with a number indicating the buffers size. Remeber to check the return value.

Adrian

I hope to have a somewhat complete parsing tutorial posted here at TSDN before the end of the weekend. Stay tuned. :)


Adrian

[AdrianH]

Done. See here for more info on parsing in C.


Adrian