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Revision as of 15:44, 31 July 2006 (edit) Massemanet (Talk | contribs) (How to add a new bif to the emulator) ← Previous diff		Revision as of 15:45, 31 July 2006 (edit) (undo) Massemanet (Talk | contribs) Next diff →
Line 1:		Line 1:
-
	0) run configure		0) run configure
Line 5:		Line 4:
	e.g.		e.g.
		+	{
	bif re:grep/2		bif re:grep/2
	bif re:compile/1		bif re:compile/1
-		+	}
	2) create a C file		2) create a C file

---

Revision as of 15:45, 31 July 2006

0) run configure

1) add your bifs to erts/emulator/beam/bif.tab

e.g. { bif re:grep/2 bif re:compile/1 } 2) create a C file

e.g. erts/emulator/beam/erl_bif_re.c

3) add your C file to erts/emulator/<arch>/Makefile

e.g. RUN_OBJS = $(OBJDIR)/erl_bif_re.o \

4) implement your bifs by stealing bits from existing erl_bif_*.c files

e.g. BIF_RETTYPE re_grep_2(BIF_ALIST_2){

Eterm result;
result = magic_function();
BIF_RET(result);

}

5) run make; make install

 steps 0-3 need only be done once.

 note that if you add

bif re:grep/2

 to bif.tab

there should be a erl_bif_re.c

 that implements

BIF_RETTYPE re_grep_2(BIF_ALIST_2);