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Revision as of 17:11, 31 July 2006 (edit) Massemanet (Talk | contribs) ← Previous diff		Current revision (17:13, 31 July 2006) (edit) (undo) Massemanet (Talk | contribs)
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		+	===caveat===
		+	unless you really know what you're doing, you'll be better off using a linked-in driver or a port.
	===steps===		===steps===
	:1. run configure		:1. run configure
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	BIF_RETTYPE re_grep_2(BIF_ALIST_2);		BIF_RETTYPE re_grep_2(BIF_ALIST_2);
	</pre>		</pre>
-	*unless you really know what you're doing, you'll be better off using a linked-in driver or a port.
	[[Category:HowTo]]		[[Category:HowTo]]

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Current revision

[edit] caveat

unless you really know what you're doing, you'll be better off using a linked-in driver or a port.

[edit] steps

1. run configure

2. add your bifs to erts/emulator/beam/bif.tab

bif re:grep/2 bif re:compile/1

3. create a C file

erts/emulator/beam/erl_bif_re.c

4. add your C file to erts/emulator/<arch>/Makefile

RUN_OBJS = $(OBJDIR)/erl_bif_re.o \

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

BIF_RETTYPE re_grep_2(BIF_ALIST_2){
  Eterm result;
  result = magic_function(); 
  BIF_RET(result);
}

6. run make; make install

[edit] notes

• 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);