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Core: [W]String::Find(String) optimized

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git-svn-id: svn://ultimatepp.org/upp/trunk@6974 f0d560ea-af0d-0410-9eb7-867de7ffcac7
This commit is contained in:
cxl 2014-03-01 19:05:54 +00:00
parent e4cccb3fc5
commit 76f5958b1d
1 changed files with 39 additions and 8 deletions
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47
uppsrc/Core/AString.hpp
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@ -83,7 +83,7 @@ int AString<B>::ReverseFind(int len, const tchar *s, int from) const
const tchar *p = ptr + from - len + 1;
len *= sizeof(tchar);
while(p >= ptr) {
if(memcmp(s, p, len) == 0)
if(*s == *p && memcmp(s, p, len) == 0)
return (int)(p - ptr);
p--;
}
@ -125,18 +125,49 @@ template <class B>
int AString<B>::Find(int len, const tchar *s, int from) const
{
ASSERT(from >= 0 && from <= GetLength());
const tchar *ptr = B::Begin();
const tchar *p = ptr + from;
int l = GetLength() - len - from;
if(l < 0)
return -1;
if(len == 0)
return from;
const tchar *ptr = B::Begin();
const tchar *p = ptr + from;
const tchar *e = p + l;
len *= sizeof(tchar);
while(p <= e) {
if(memcmp(s, p, len) == 0)
return (int)(p - ptr);
p++;
if(len > 4) {
len -= 4;
while(p <= e) {
if(s[0] == p[0] && s[1] == p[1] && s[2] == p[2] && s[3] == p[3] && memcmp(s + 4, p + 4, len * sizeof(tchar)) == 0)
return (int)(p - ptr);
p++;
}
}
else
if(len == 4)
while(p <= e) {
if(s[0] == p[0] && s[1] == p[1] && s[2] == p[2] && s[3] == p[3])
return (int)(p - ptr);
p++;
}
else
if(len == 3)
while(p <= e) {
if(s[0] == p[0] && s[1] == p[1] && s[2] == p[2])
return (int)(p - ptr);
p++;
}
else
if(len == 2)
while(p <= e) {
if(s[0] == p[0] && s[1] == p[1])
return (int)(p - ptr);
p++;
}
else
while(p <= e) {
if(*s == *p)
return (int)(p - ptr);
p++;
}
return -1;
}