[Erlang]怎样加入自己的BIF

步骤

1. 执行configure

2. 将你的bifs加入至erts/emulator/beam/bif.tab

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

3. 创建一个C代码文件

erts/emulator/beam/erl_bif_re.c

4.将你的C代码文件加入至erts/emulator/<arch>/Makefile里

RUN_OBJS = $(OBJDIR)/erl_bif_re.o \

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

參考其余的erl_bif_*.c文件，加入以下这段代码

?

1 2 3 4 5

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

6. 执行make; make install

重点回想：

步骤0-3仅仅需执行一次，假设你将以下的bif

?

1	bif re:grep/2

加入至bif.tab时。erl_bif_re.c文件要实现以下这个函数

title=Adding_my_own_BIF#" class="toolbar_item command_help help" style="font-variant: inherit; color: white !important; margin: 0px !important; padding: 1px 0px 0px !important; border: 0px !important; font-size: 1em !important; vertical-align: baseline !important; text-decoration: none !important; border-top-left-radius: 0px !important; border-top-right-radius: 0px !important; border-bottom-right-radius: 0px !important; border-bottom-left-radius: 0px !important; background-image: none !important; bottom: auto !important; float: none !important; height: auto !important; left: auto !important; outline: 0px !important; overflow: visible !important; position: static !important; right: auto !important; text-align: center !important; top: auto !important; width: auto !important; box-sizing: content-box !important; min-height: inherit !important; display: block !important;">?

1	BIF_RETTYPE re_grep_2(BIF_ALIST_2);