[PATCH] parser: remove unnecessary strlen()

From: Andrà Goddard Rosa
Date: Thu Nov 19 2009 - 11:05:23 EST


No functional change. Cache strlen() result to avoid recalculating it up
to 3 times on the worst case.

Reduces code size a little by 32 bytes:
text data bss dec hex filename
1385 0 0 1385 569 lib/parser.o-BEFORE
1353 0 0 1353 549 lib/parser.o-AFTER

Signed-off-by: Andrà Goddard Rosa <andre.goddard@xxxxxxxxx>
---
lib/parser.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/lib/parser.c b/lib/parser.c
index b00d020..fb34977 100644
--- a/lib/parser.c
+++ b/lib/parser.c
@@ -56,13 +56,16 @@ static int match_one(char *s, const char *p, substring_t args[])

args[argc].from = s;
switch (*p++) {
- case 's':
- if (strlen(s) == 0)
+ case 's': {
+ size_t str_len = strlen(s);
+
+ if (str_len == 0)
return 0;
- else if (len == -1 || len > strlen(s))
- len = strlen(s);
+ if (len == -1 || len > str_len)
+ len = str_len;
args[argc].to = s + len;
break;
+ }
case 'd':
simple_strtol(s, &args[argc].to, 0);
goto num;
--
1.6.5.3.148.g785c5

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