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Start using C99 variadic macros.

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In the past, I've had a lot of macros which you call with double
parentheses, along the lines of debug(("format string", params)), so
that the inner parens protect the commas and permit the macro to treat
the whole printf-style argument list as one macro argument.

That's all very well, but it's a bit inconvenient (it doesn't leave
you any way to implement such a macro by prepending another argument
to the list), and now this code base's rules allow C99isms, I can
switch all those macros to using a single pair of parens, using the
C99 ability to say '...' in the parameter list of the #define and get
at the corresponding suffix of the arguments as __VA_ARGS__.

So I'm doing it. I've made the following printf-style macros variadic:
bpp_logevent, ppl_logevent, ppl_printf and debug.

While I'm here, I've also fixed up a collection of conditioned-out
calls to debug() in the Windows front end which were clearly expecting
a macro with a different calling syntax, because they had an integer
parameter first. If I ever have a need to condition those back in,
they should actually work now.
This commit is contained in:
Simon Tatham
2018-12-08 20:32:31 +00:00
parent 383a16d5e5
commit e08641c912
26 changed files with 525 additions and 532 deletions
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14
sshppl.h
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@ -118,16 +118,14 @@ void ssh2_userauth_set_transport_layer(PacketProtocolLayer *userauth,
/* Convenience macro for protocol layers to send formatted strings to
* the Event Log. Assumes a function parameter called 'ppl' is in
* scope, and takes a double pair of parens because it passes a whole
* argument list to dupprintf. */
#define ppl_logevent(params) ( \
logevent_and_free((ppl)->logctx, dupprintf params))
* scope. */
#define ppl_logevent(...) ( \
logevent_and_free((ppl)->logctx, dupprintf(__VA_ARGS__)))
/* Convenience macro for protocol layers to send formatted strings to
* the terminal. Also expects 'ppl' to be in scope and takes double
* parens. */
#define ppl_printf(params) \
ssh_ppl_user_output_string_and_free(ppl, dupprintf params)
* the terminal. Also expects 'ppl' to be in scope. */
#define ppl_printf(...) \
ssh_ppl_user_output_string_and_free(ppl, dupprintf(__VA_ARGS__))
void ssh_ppl_user_output_string_and_free(PacketProtocolLayer *ppl, char *text);
/* Methods for userauth to communicate back to the transport layer */