www.pudn.com > ucosv2(GUI).rar > GUIUC0.c

/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              µC/GUI is protected by international copyright laws. Knowledge of the
*              source code may not be used to write a similar product. This file may
*              only be used in accordance with a license and should not be redistributed
*              in any way. We appreciate your understanding and fairness.
*
---------------------------------------------------------------------- 
File        : GUIUC0.C 
Purpose     : Implementation of character and string services 
---------------------------------------------------------------------- 
Version-Date---Author-Explanation 
---------------------------END-OF-HEADER------------------------------ 
*/ 
 
#include            /* needed for definition of NULL */ 
#include "GUI.H" 
  
#if GUI_SUPPORT_UNICODE 
 
/* 
    ******************************************************** 
    *                                                      * 
    *        UNICODE routines                              * 
    *                                                      * 
    ******************************************************** 
*/ 
 
/******************* GUI_UC2DB *********************************** 
 Convert Convert UNICODE 16-bit value into double byte version 
   Byte0: First byte, msb 
   Byte1: Last  byte, lsb 
*/ 
void GUI_UC2DB (U16 Code, U8* pOut) { 
/* move regular ASCII to (unused) 0xE000-0xE0ff area */ 
  if (Code < 0x100) { 
    if (Code !=0)  /* end marker ? */ 
      Code += 0xe000; 
  } else { 
/* If Low byte 0: Move to (unused) 0xE100-0xE1ff area */ 
    if ((Code&0xff) == 0) { 
      Code = (Code>>8) +0xe100; 
    } 
  } 
/* Convert into double byte, putting msb first*/ 
  *pOut++ = Code >> 8;     /* Save msb first */ 
  *pOut   = Code & 0xff; 
} 
 
/******************* GUI_DB2UC *********************************** 
 Convert Unicode double byte into UNICODE 
   Byte0: First byte, msb 
   Byte1: Last  byte, lsb 
*/ 
 
U16 GUI_DB2UC (U8 Byte0, U8 Byte1) { 
  if (Byte0==0) 
    return 0; 
  if ((Byte0&0xfe) == 0xe0) { 
    if (Byte0 == 0xe0)        /* ASCII */ 
      return Byte1; 
    return ((U16)Byte1)<<8;   /* low byte was zero */ 
  } 
  return Byte1 | (((U16)Byte0)<<8); 
} 
 
#else 
 
void GUIUC0_C(void) {} /* avoid empty object files */ 
 
#endif /* GUI_SUPPORT_UNICODE */