Erlang Central

Adding my own BIF

Revision as of 15:54, 31 July 2006 by Rvirding (Talk | contribs)

0) run configure
1) add your bifs to erts/emulator/beam/bif.tab
bif re:grep/2
bif re:compile/1
2) create a C file
erts/emulator/beam/erl_bif_re.c
3) add your C file to erts/emulator/<arch>/Makefile
RUN_OBJS = $(OBJDIR)/erl_bif_re.o \
4) 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);
}
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);