Erlang Central

Difference between revisions of "Adding my own BIF"

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Line 4: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);