[fpc-pascal] Is there a range limitation for the in operator?
I have been debugging a file analyzer program which is supposed to show a record if one clicks in the hex representation of the binary file content. I have a function which will grab the start and length of a record given the address clicked on. The file contains several different sections, basically: - header (30 bytes) - array of type 1 records (n * 14 bytes) - array of type 2 records (m * 25 bytes) The counts m and n are available in the header record as word size values. So I have this construct to translate theinput address into a start and length result: if Addr in [0..sizHd-1] then //Clicked in the header begin //Calculate start and end address of header end else if Addr in [(sizHd)..(sizHd + sizGeos -1)] then begin //Calculate start and end address of clicked record in array end else if Addr in [(sizHd + sizGeos)..(sizHd + sizGeos + sizCmds -1)] then begin //Calculate start and end address of clicked record in array end; This seemingly worked fine until I clicked inside the area of he type 2 records, when the execution never got to the last calculation... So I changed the code from using "in" to this instead: else if (Addr >= strtCmds) and (Addr < (strtCmds + sizCmds)) then Where I previously have done this: strtCmds := strtElecs + sizGeos; Now it works as planned So I wonder if there is a value range limitation for the arguments inside an in command like: if a in [x..y] then ??? -- Bo Berglund Developer in Sweden ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Is there a range limitation for the in operator?
Bo Berglund via fpc-pascal schrieb am Mi., 22. Dez. 2021, 16:08: > So I wonder if there is a value range limitation for the arguments inside > an in > command like: > if a in [x..y] then > The right side of the in-operator is a set constructor. And sets may only contain up to 256 values. (Though I don't know right now whether that is always counted from 0 or not) Regards, Sven > ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Is there a range limitation for the in operator?
On Wed, 22 Dec 2021 17:07:55 +0100, Sven Barth via fpc-pascal wrote: >Bo Berglund via fpc-pascal schrieb am >Mi., 22. Dez. 2021, 16:08: > >> So I wonder if there is a value range limitation for the arguments inside >> an in >> command like: >> if a in [x..y] then >> > >The right side of the in-operator is a set constructor. And sets may only >contain up to 256 values. (Though I don't know right now whether that is >always counted from 0 or not) > Ok, thanks. Figured that it was something like that. So I have to stack several if conditions instead. -- Bo Berglund Developer in Sweden ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
