On Sat Feb 27 21:08:17 EST 2010, lyn...@orthanc.ca wrote:
> > using awk is still faster
>
> For the curious and lazy ... why is that?
it is curious!
it appears that the ape strtod is much faster,
though it isn't quite correct:
both of these are in /sys/src/libc/port/strtod.c
% Time C
> using awk is still faster
For the curious and lazy ... why is that?
very nice!
one problem, ifmt can crash with the argument -f %g.
fomatting %g will mean that !running to be true when
calling ifmt, thus ifmt will try to va_arg a double cast to
vlong when formatting an integer:
/sys/src/libc/fmt/fltfmt.c:136: sprint(s1+NSIGNIF, "e%d",
e-NSIGNIF+1
diff -r 3024d1ef1140 src/cmd/seq.c
--- a/src/cmd/seq.c Wed Sep 30 11:01:45 2009 -0700
+++ b/src/cmd/seq.c Sat Feb 27 16:11:56 2010 -0800
@@ -47,6 +47,39 @@
format = fmt;
}
+extern int __ifmt(Fmt*); // _ifmt on Plan 9
+
+static int
+doifmt(Fmt *f, ...)
+{
+ int rv;
+
i've attached a little program that extends
seq to print sequences in hex or octal. for example,
; seq.rc -f %.4x 0x3b1 0x3b2
03b1
03b2
i did it in rc (really awk) because it was too tedious
to get the details right in c.
as such, formats are as in printf(2) not as in p
