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lib: Comment on how macro works
Signed-off-by: Donald Lee <dlqs@gmx.com>
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@ -122,8 +122,22 @@ void frrscript_register_type_codecs(struct frrscript_codec *codecs);
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*/
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void frrscript_init(const char *scriptdir);
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/*
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* This macro is mapped to every (name, value) in frrscript_call,
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* so this in turn maps them onto their encoders
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*/
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#define ENCODE_ARGS(name, value) ENCODE_ARGS_WITH_STATE(lfs->L, value)
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/*
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* This macro is also mapped to every (name, value) in frrscript_call, but
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* not every value can be mapped to its decoder - only those that appear
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* in the returned table will. To find out if they appear in the returned
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* table, first pop the value and check if its nil. Only call the decoder
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* if non-nil.
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*
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* At the end, the only thing left on the stack should be the
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* returned table.
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*/
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#define DECODE_ARGS(name, value) \
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do { \
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lua_getfield(lfs->L, 1, name); \
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