Quoting Frank Adam to Paul Edwards:



[snip]



FA>Talking about strcmp() i have noticed something that nobody mentioned,

FA>it actually returns the ascii code of the character it fails on in

FA>str1,  and negates it if *str2 > *str1. 



That's quite interesting; presumably the asm source involves lodsb and

cmp al,[es:di] or some such. Therefore the character from str1 is already in

AL, so it doesn't require any instructions to produce the return code.

However, this wouldn't work with a character over the value of 127, because

that would be interpreted as a negative number. Have you tried it with

str1 containing such a character? (Or does the strcmp() function assume 0 to

127 characters?)



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