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Modified StartWith/EndsWith char32 version

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This commit is contained in:
Brian Fiete 2020-01-24 06:02:53 -08:00
parent a43d7ca991
commit 1f77412536
1 changed files with 17 additions and 15 deletions
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32
BeefLibs/corlib/src/String.bf
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@ -1716,6 +1716,15 @@ namespace System
return Ptr[0] == c; return Ptr[0] == c;
} }
public bool StartsWith(char32 c)
{
if (c < '\x80')
return StartsWith((char8)c);
if (mLength == 0)
return false;
return UTF8.Decode(Ptr, mLength).c == c;
}
public bool EndsWith(char8 c) public bool EndsWith(char8 c)
{ {
if (mLength == 0) if (mLength == 0)
@ -1725,22 +1734,15 @@ namespace System
public bool EndsWith(char32 c) public bool EndsWith(char32 c)
{ {
int encodedLen = UTF8.GetEncodedLength(c); if (c < '\x80')
char8* ptr = Ptr; return EndsWith((char8)c);
if (mLength == 0) if (mLength == 0)
return false; return false;
let (c32, _) = UTF8.Decode(ptr + mLength - 1 * encodedLen, encodedLen);
return c32 == c;
}
public bool StartsWith(char32 c)
{
int encodedLen = UTF8.GetEncodedLength(c);
char8* ptr = Ptr; char8* ptr = Ptr;
if (mLength == 0) int idx = mLength - 1;
return false; while ((idx > 0) && ((uint8)ptr[idx] & 0xC0 == 0x80))
let (c32, _) = UTF8.Decode(ptr, encodedLen); idx--;
return c32 == c; return UTF8.Decode(ptr + idx, mLength - idx).c == c;
} }
public void ReplaceLargerHelper(String find, String replace) public void ReplaceLargerHelper(String find, String replace)
@ -2117,7 +2119,7 @@ namespace System
return false; return false;
} }
public (char32 c, int len) GetChar32(int idx) public (char32 c, int8 len) GetChar32(int idx)
{ {
Debug.Assert((uint)idx < (uint)mLength); Debug.Assert((uint)idx < (uint)mLength);
char8* ptr = Ptr; char8* ptr = Ptr;
@ -2129,7 +2131,7 @@ namespace System
return UTF8.Decode(ptr + idx, mLength - idx); return UTF8.Decode(ptr + idx, mLength - idx);
} }
public (char32 c, int idx, int len) GetChar32WithBacktrack(int idx) public (char32 c, int idx, int8 len) GetChar32WithBacktrack(int idx)
{ {
Debug.Assert((uint)idx < (uint)mLength); Debug.Assert((uint)idx < (uint)mLength);
char8* ptr = Ptr; char8* ptr = Ptr;