ext/scintilla/src/UniConversion.h

   1 // Scintilla source code edit control
   2 /** @file UniConversion.h
   3  ** Functions to handle UTF-8 and UTF-16 strings.
   4  **/
   5 // Copyright 1998-2001 by Neil Hodgson <neilh@scintilla.org>
   6 // The License.txt file describes the conditions under which this software may be distributed.
   7
   8 const int UTF8MaxBytes = 4;
   9
  10 unsigned int UTF8Length(const wchar_t *uptr, unsigned int tlen);
  11 void UTF8FromUTF16(const wchar_t *uptr, unsigned int tlen, char *putf, unsigned int len);
  12 unsigned int UTF8CharLength(unsigned char ch);
  13 unsigned int UTF16Length(const char *s, unsigned int len);
  14 unsigned int UTF16FromUTF8(const char *s, unsigned int len, wchar_t *tbuf, unsigned int tlen);
  15
  16 extern int UTF8BytesOfLead[256];
  17 void UTF8BytesOfLeadInitialise();
  18
  19 inline bool UTF8IsTrailByte(int ch) {
  20         return (ch >= 0x80) && (ch < 0xc0);
  21 }
  22
  23 inline bool UTF8IsAscii(int ch) {
  24         return ch < 0x80;
  25 }
  26
  27 enum { UTF8MaskWidth=0x7, UTF8MaskInvalid=0x8 };
  28 int UTF8Classify(const unsigned char *us, int len);