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Minor optimisation for utf-8 string initialisation

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@23098 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
rfm 2006-06-22 22:36:46 +00:00
parent 12e5d0d9da
commit 2c0ee96dfe
2 changed files with 47 additions and 2 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2006-06-22 Richard Frith-Macdonald <rfm@gnu.org>
* Source/GSString.m: small optimisation for initialisation with
unicode data which happens to be just ascii.
2006-06-20 Richard Frith-Macdonald <rfm@gnu.org> 2006-06-20 Richard Frith-Macdonald <rfm@gnu.org>
* Source/GSHTTPDigest.m: deleted * Source/GSHTTPDigest.m: deleted

44
Source/GSString.m
View file

@ -506,7 +506,27 @@ fixBOM(unsigned char **bytes, unsigned *length, BOOL *shouldFree,
} }
} }
if (encoding != internalEncoding && GSIsByteEncoding(encoding) == YES) if (encoding == NSUTF8StringEncoding)
{
unsigned i;
for (i = 0; i < length; i++)
{
if ((chars.c)[i] > 127)
{
break;
}
}
if (i == length)
{
/*
* This is actually ASCII data ... so we can just store it as if
* in the internal 8bit encoding scheme.
*/
encoding = internalEncoding;
}
}
else if (encoding != internalEncoding && GSIsByteEncoding(encoding) == YES)
{ {
unsigned i; unsigned i;
@ -3653,7 +3673,27 @@ NSAssert(_flags.free == 1 && _zone != 0, NSInternalInconsistencyException);
chars = (unsigned char*)bytes; chars = (unsigned char*)bytes;
} }
if (encoding != internalEncoding && GSIsByteEncoding(encoding) == YES) if (encoding == NSUTF8StringEncoding)
{
unsigned i;
for (i = 0; i < length; i++)
{
if (chars[i] > 127)
{
break;
}
}
if (i == length)
{
/*
* This is actually ASCII data ... so we can just store it as if
* in the internal 8bit encoding scheme.
*/
encoding = internalEncoding;
}
}
else if (encoding != internalEncoding && GSIsByteEncoding(encoding) == YES)
{ {
unsigned i; unsigned i;