check string type?

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patchariadog

Joined: 24 Mar 2013
Posts: 94

patchariadog 28 Jul 2014, 02:06

Hi everybody. I was wondering if their is a way to check what type of string a user passes into a proc. for example I was building a stringcopy proc and I noticed that it works fine on rb strings but fails on dd ? strings. I realized to make it work on dd ? you have to mov each byte into the dd ? string with an extra offset of 4(since it is a double word) so, I guess I could make two different stringcopy procs, but I was wondering if their is a way I can check if I pass a rb or a dd ? in

thanks

28 Jul 2014, 02:06

BAiC

Joined: 22 Mar 2011
Posts: 272
Location: California

BAiC 28 Jul 2014, 07:05

the type is usually implied by code. i.e., you make a version for each type that you want to support. you can always add dynamic support (pass in a parameter for type) but if you use a macro mechanism (to switch between rb/rd(dd)) then it won't be a procedure anymore.

28 Jul 2014, 07:05

AsmGuru62

Joined: 28 Jan 2004
Posts: 1739
Location: Toronto, Canada

AsmGuru62 28 Jul 2014, 10:23

I am not sure I understand your question.
The string by definition is an address of its first character.
So, you have to pass into procedure that address:

Code:

String1 rb 256
String2 db 'This is a string.',0
pStr2   dd String2
...
stdcall StringCopy, [pStr2]   ; passed address of string 2
stdcall StringCopy, String1   ; passed address of string 1
stdcall StringCopy, String2   ; passed address of string 2 (again)

28 Jul 2014, 10:23

patchariadog

Joined: 24 Mar 2013
Posts: 94

patchariadog 28 Jul 2014, 14:41

I think I got it figured out. Thanks

28 Jul 2014, 14:41

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