gui_uc_encodebig5.c

ucgui下

#include "gui_core_kernel_private.h"
/*********************************************************************
*
*       Static code
*
**********************************************************************
*/
/*********************************************************************
*
*       _GetCharCode
*
* Purpose:
*   Return the UNICODE character code of the current character.
*/
static U16 _GetCharCode(const char GUI_UNI_PTR * s) {
   U16 r;
  // U16 temp;
   U8 Char = *(const U8*)s;
   if (Char < 0x80) {               
    r = Char;
  } else if (Char > 0xa1) {             //  changge 0xa1 to 0x80 for GBK     
    r = (Char & 0xff) << 8;
    Char = *(++s);
    Char &= 0xff;
    r |= Char;
    r = Big5_to_Unicode(r);
  } else {
    __inf("Illegal character during GB2312 decoding!\n");
    r = 1;       
  }

  return r;
}

/*********************************************************************
*
*       _GetCharSize
*
* Purpose:
*   Return the number of bytes of the current character.
*/
static int _GetCharSize(const char GUI_UNI_PTR * s) {
  U8 Char = *s;
  if (Char < 0xa1) {
    return 1;
  } else if (Char >0xa1 ) {
    return 2;

  }
  __inf("Illegal character during GB2312 decoding!\n");
  return 1; 
}

/*********************************************************************
*
*       _CalcSizeOfChar
*
* Purpose:
*   Return the number of bytes needed for the given character.
*/
static int _CalcSizeOfChar(U16 Char) {
  int r=0;
  if ((Char>=0xa140)&&(Char< 0xf9ff)) {   /* Single byte (ASCII)  */
    r = 2;
  } else if (Char <0x80) {             /* Double byte sequence */
    r = 1;
  }
  return r;
}

/*********************************************************************
*
*       _Encode
*
* Purpose:
*   Encode character into 1/2/3 bytes.
*/
static int _Encode(char *s, U16 Char) {
  int r;
  r = _CalcSizeOfChar(Char);
  switch (r) {
  case 1:
    *s = (char)Char;
    break;
  case 2:
    *s++ = (Char >> 8)&0xff;
    *s   = Char & 0xFF00;
    break;

  }
  return r;
}

/*********************************************************************
*
*       _API_Table
*/
static const GUI_UC_ENC_APILIST _API_Table = {
  _GetCharCode,     /*  return character code as U16 (Unicode) */
  _GetCharSize,     /*  return size of character: 1/2/3        */
  _CalcSizeOfChar,  /*  return size of character: 1/2/3        */
  _Encode           /*  Encode character into 1/2/3 bytes      */
};

/*********************************************************************
*
*       Exported code
*
**********************************************************************
*/
/*********************************************************************
*
*       GUI_UC_SetEncodeBig5
*/
void GUI_UC_SetEncodeBig5(void) {
  GUI_LOCK();
  GUI_Context.pUC_API = &_API_Table;
  GUI_UNLOCK();
}

/*************************** End of file ****************************/