MIPS: Creating a string from bytes read

Question

I'm reading a string from a buffer, and at some point I need to stop and get the string of what I've read so far and get the size of this string, so let's say I've the string: "StackOverflow" and going to use "v" as my stop point, so I should have something like "StackO" as my result string.

The thing is, to count the size of it, I'm reading byte by byte, so when I get to the stop point, the register $t0 which is counting the size of it should have the value 6 in it. So, how can I create a string that has "Stack0" in it?

prl · Accepted Answer · 2018-05-16 04:36:15Z

1

Assuming you are using null-terminated strings, you can either a) copy the string to another buffer and add a 0 (null character) after the 6th character, or b) put the 0 in the original buffer after the 6th character, overwriting the ‘v’, if you don’t mind destroying the original string.

answered May 16, 2018 at 4:36

prl

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3 Comments

Paulo Calado Over a year ago

How would I put the 0 after the 6th character?

Peter Cordes Over a year ago

@PauloCalado: sb $0, ($t1), where $t1 is the pointer to the 'v' you already have (because you had to load it in the first place).

Paulo Calado Over a year ago

Thank you very much sir!

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