ansaurus

Question

Answer 1

+1 A:

Read it into a char buffer and use atoi() to convert the string into a int.

Timo Geusch 2010-10-14 14:39:35

assuming an integer as 4 bytes, is this what you mean?char buf[4];read(client, buf, 4);int integer = atoi(buf);

Eduardo Abreu 2010-10-14 15:18:50

Not quite - if the Java server is sending the Int as four bytes, the whole thing is going to get a lot more complicated as you basically need to know exactly in what byte order the Int is sent. I would try to send Int as a string, use a somewhat bigger buffer (16 bytes up) to store the string in and then use atoi as you suggested. If you're sending the Int as a byte representation, I would convert it to network byte order before sending and convert it back to host order once you received it, otherwise you're in a world of really odd bugs.

Timo Geusch 2010-10-14 15:24:07

atoi has no error-handling, atoi("0") == atoi("blah"); better you use strtol

2010-10-14 19:51:28

Answer 2

A:

You can use the read function, but you have to be careful to consume sizeof(int) chars from the socket and then you have to worry about endianess.

Michael Goldshteyn 2010-10-14 14:39:44

Answer 3

A:

fscanf should work if you don't mind sending in plain text:

fscanf(dataIn, "%d", &a);

Plain text rules :-) Just be sure to send a '\n' (or something not a digit) from the source before the flush.

pmg 2010-10-14 14:55:56

ansaurus

tags:

views:

answers:

Java's readInt() equivalent in C?

related questions