I am trying to move the hand-crafted dbc parser
(which is pretty crappy) to a full featured parser based on
yacc/lex. But I’m concerned this will be complex to build
(requiring yacc and lex on the build systems). Given that esp
idf already uses this (for Kconfig), it should be ok.
I have committed a stub for this (into
components/dbc). It compiles for me with two warnings:
/components/dbc/yacclex/dbc_tokeniser.c:1630:17:
warning: 'yyunput' defined but not used
[-Wunused-function]
static void
yyunput (int c, register char * yy_bp )
^
components/dbc/yacclex/dbc_tokeniser.c:1675:16:
warning: 'input' defined but not used
[-Wunused-function]
static int input
(void)
^
Those warnings are acceptable, and will be resolved
when the full implementation comes.
- On my mac it worked fine
- On Linux, I had to install bison and setup a
/usr/bin/yacc wrapper
- I haven’t tried at all on windows
Could you guys check, and let me know if you see any
issues? In particular, on windows. If no issues, I’ll proceed
and finish up the grammar and implementation.
Regards, Mark.
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