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libudev: util - optimize path_encode()

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Since we already know the length, use memcpy() instead.
Measured 2% _user_ cpu time reduction on EeePC coldplug.

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
This commit is contained in:
Alan Jenkins 2008-10-21 11:12:57 +01:00 committed by Kay Sievers
parent b29a5e4ab9
commit fa0e955a93
1 changed files with 5 additions and 3 deletions
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8
udev/lib/libudev-util.c
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@ -114,7 +114,6 @@ size_t util_path_encode(char *s, size_t len)
char t[(len * 3)+1]; char t[(len * 3)+1];
size_t i, j; size_t i, j;
t[0] = '\0';
for (i = 0, j = 0; s[i] != '\0'; i++) { for (i = 0, j = 0; s[i] != '\0'; i++) {
if (s[i] == '/') { if (s[i] == '/') {
memcpy(&t[j], "\\x2f", 4); memcpy(&t[j], "\\x2f", 4);
@ -127,8 +126,11 @@ size_t util_path_encode(char *s, size_t len)
j++; j++;
} }
} }
t[j] = '\0'; if (len == 0)
strncpy(s, t, len); return j;
i = (j < len - 1) ? j : len - 1;
memcpy(s, t, i);
s[i] = '\0';
return j; return j;
} }