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Marshalling macros put_dataz and put_datalit.

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When I wanted to append an ordinary C string to a BinarySink, without
any prefix length field or suffix terminator, I was using the idiom

  put_datapl(bs, ptrlen_from_asciz(string));

but I've finally decided that's too cumbersome, and it deserves a
shorter name. put_dataz(bs, string) now does the same thing - in fact
it's a macro expanding to exactly the above.

While I'm at it, I've also added put_datalit(), which is the same
except that it expects a C string literal (and will enforce that at
compile time, via PTRLEN_LITERAL which it calls in turn). You can use
that where possible to avoid the run-time cost of the strlen.
This commit is contained in:
Simon Tatham
2021-11-19 14:33:23 +00:00
parent be8d3974ff
commit cc6d3591ad
7 changed files with 11 additions and 7 deletions
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4
marshal.h
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@ -141,6 +141,10 @@ struct BinarySink {
BinarySink_put_data(BinarySink_UPCAST(bs), val, len)
#define put_datapl(bs, pl) \
BinarySink_put_datapl(BinarySink_UPCAST(bs), pl)
#define put_dataz(bs, val) \
BinarySink_put_datapl(BinarySink_UPCAST(bs), ptrlen_from_asciz(val))
#define put_datalit(bs, val) \
BinarySink_put_datapl(BinarySink_UPCAST(bs), PTRLEN_LITERAL(val))
/* Emit printf-formatted data, with no terminator. */
#define put_fmt(bs, ...) \