From f1a07a055a9e1fce1024443e8bf9dcd36c0739f2 Mon Sep 17 00:00:00 2001 From: Ben Pfaff Date: Sun, 15 Aug 2010 22:03:19 -0700 Subject: [PATCH] format: Optimize fmt_from_io(). A "switch" statement should be much faster than a linear search. --- src/data/format.c | 21 +++++++++++---------- 1 file changed, 11 insertions(+), 10 deletions(-) diff --git a/src/data/format.c b/src/data/format.c index aa872348..3907016c 100644 --- a/src/data/format.c +++ b/src/data/format.c @@ -1,5 +1,5 @@ /* PSPP - a program for statistical analysis. - Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc. + Copyright (C) 1997-9, 2000, 2006, 2010 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -772,15 +772,16 @@ fmt_to_io (enum fmt_type type) bool fmt_from_io (int io, enum fmt_type *fmt_type) { - enum fmt_type type; - - for (type = 0; type < FMT_NUMBER_OF_FORMATS; type++) - if (get_fmt_desc (type)->io == io) - { - *fmt_type = type; - return true; - } - return false; + switch (io) + { +#define FMT(NAME, METHOD, IMIN, OMIN, IO, CATEGORY) \ + case IO: \ + *fmt_type = FMT_##NAME; \ + return true; +#include "format.def" + default: + return false; + } } /* Returns true if TYPE may be used as an input format, -- 2.30.2