formatted input from string in Pascal

Question

In Pascal (Delphi, Lazarus), there is the Format() function for creating a formatted string from a list of variables. It works in a similar way to sprintf() function in C/C++.

On the other hand, I am not aware of any function which would set variables using a formatted string as sscanf() does in C/C++. Did I miss something? How would you achieve a similar effect?

There's nothing equivalent in the standard library for Delphi. — David Heffernan
– David Heffernan, Commented Feb 11, 2016 at 20:46
See stackoverflow.com/q/72672/576719. Based on some of that I made an almost complete sscanf() function. — LU RD
– LU RD, Commented Feb 11, 2016 at 20:54
My code was too large to post :(. So you can use the windows swscanf() as well: function swscanf(buffer, format: PWideChar): Integer; cdecl; varargs; external 'msvcrt.dll'; Example call: i := swscanf(PChar('42'), PChar('%x'),@j);. — LU RD
– LU RD, Commented Feb 11, 2016 at 21:22
Thanks for suggestions. The use of windows functions is not useful for me, as I want to run the program also (and mainly) under linux. The first link provided by @LU RD seems to be useful, however the answer given by Marco suits me best, as I use Lazarus (based on FreePascal). — Plzak
– Plzak, Commented Feb 12, 2016 at 10:39

Marco van de Voort · Accepted Answer · 2016-02-12 12:51:13Z

4

Free Pascal has a simple sscanf and a special scandatetime to reverse date format strings (formatdatetime opposite)

From what I see these routines should work with Delphi too with at worst token modifications.

Note that there is also writestr and readstr which are more pascal like formatted I/O concepts similar to write/readln but then to/from strings. These are compiler builtin, so won't work with Delphi

edited Feb 12, 2016 at 12:51

answered Feb 11, 2016 at 20:56

Marco van de Voort

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