Help “current directory” function
Hi glpk wizards,I wonder if there a kind of function or workaround that returns the directory path of where the ‘.mod’ file is??Basically in the folder where the ‘.mod’ file is, I have created another folder called “data” where I have all my input and output CSV data files. I can insert this directory path as a string in the GLPK reading CSV file statement. But of course if I change the directory of the project then, I have to go to the ‘.mod’ file and rewrite the directory path which is very inconvenient. So, is there a function/workaround that can return the directory path of the ‘mod’ file?Many thanks for your help.Kind regards,Manuel.
Re: MathProg grammar in EBNF
On Wed, Dec 2, 2020 at 6:29 PM Andrew Makhorin wrote: > On Wed, 2020-12-02 at 11:27 -0300, Germán Ferrari wrote: > > Hi. > > > > I couldn't find the MathProg grammar in EBNF > > You can find all the grammar productions actually used by parsing > routines in comments to these routines; > > see glpk/src/mpl/mpl1.c and mpl2.c. > > For example: > > /*-- > -- object_reference - parse reference to named object. > -- > -- This routine parses primary expression using the syntax: > -- > -- ::= > -- ::= > -- ::= [ ] > -- ::= > -- ::= [ ] > -- ::= > -- ::= [ ] > -- > -- ::= > -- ::= [ ] > -- > -- ::= > -- ::= > -- ::= > -- ::= > -- ::= > -- ::= | .lb | .ub | .status | .val | .dual */ > It did not occur to me to look there. Thank you for the pointers. > > so I created one. It only covers the declaration statements. Maybe > > it's useful to somebody else. > > Thank you. > > > > > Any comments welcome. > > I'd like to note that if you enclose non-terminals in < and >, then > terminal symbols are not needed to be enclosed in quotes. > Noted! Thank you > > > > > Thank you. > > > > Regards, > > Germán. >
Re: MathProg grammar in EBNF
On Wed, 2020-12-02 at 11:27 -0300, Germán Ferrari wrote: > Hi. > > I couldn't find the MathProg grammar in EBNF You can find all the grammar productions actually used by parsing routines in comments to these routines; see glpk/src/mpl/mpl1.c and mpl2.c. For example: /*-- -- object_reference - parse reference to named object. -- -- This routine parses primary expression using the syntax: -- -- ::= -- ::= -- ::= [ ] -- ::= -- ::= [ ] -- ::= -- ::= [ ] -- -- ::= -- ::= [ ] -- -- ::= -- ::= -- ::= -- ::= -- ::= -- ::= | .lb | .ub | .status | .val | .dual */ > so I created one. It only covers the declaration statements. Maybe > it's useful to somebody else. Thank you. > > Any comments welcome. I'd like to note that if you enclose non-terminals in < and >, then terminal symbols are not needed to be enclosed in quotes. > > Thank you. > > Regards, > Germán.
MathProg grammar in EBNF
Hi. I couldn't find the MathProg grammar in EBNF so I created one. It only covers the declaration statements. Maybe it's useful to somebody else. Any comments welcome. Thank you. Regards, Germán. ebnf-mathprog.pdf Description: Adobe PDF document
