www.pudn.com > ucosv2(GUI).rar > GUIEncJS.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        : GUIEncSJ.C 
Purpose     : Implementation of Shift JIS decoding 
---------------------------------------------------------------------- 
Version-Date---Author-Explanation 
---------------------------END-OF-HEADER------------------------------ 
*/ 
 
 
#include            /* needed for definition of NULL */ 
#include "GUI_Protected.H" 
 
  
 
 
 
/* 
*********************************************************** 
* 
*                       Static subroutines 
* 
*********************************************************** 
*/ 
 
static U16 DB2SJIS(U8 Byte0, U8 Byte1) { 
  return Byte1 | (((U16)Byte0)<<8); 
} 
 
/*************** GUI_GetStringDistX **************************** 
This routine is used to calculate the length of a string in pixels. 
*/ 
 
int GUI_GetLineDistX_SJIS(const char GUI_FAR *s, int Len) { 
  int Dist =0; 
  if (s) { 
    U8 c0; 
    while (((c0=*(U8*)s) !=0) && Len >=0) { 
      s++; Len--; 
      if (c0 > 127) { 
        U8  c1 = *(U8*)s++; 
        Len--; 
        Dist += GUI_GetCharDistX(DB2SJIS(c0, c1)); 
      } else { 
        Dist += GUI_GetCharDistX(c0); 
      } 
    } 
  } 
  return Dist; 
} 
 
/*************** GUI_GetLineLen **************************** 
Returns the number of characters in a string 
Note: tthe return value can be used as offset into the 
string, which means that double characters count double 
*/ 
 
int GUI_GetLineLen_SJIS(const char GUI_FAR *s, int MaxLen) { 
  int Len =0; 
  U8 c0; 
  while (((c0=*(U8*)s) !=0) && Len < MaxLen) { 
    s++; 
    if (c0 > 127) { 
      Len++; s++; 
    } else { 
      switch (c0) { 
      case '\n': return Len; 
      } 
    } 
    Len++; 
  } 
  return Len; 
} 
 
/* 
******************************************************** 
* 
*                Display line 
* 
******************************************************** 
*/ 
 
void GL_DispLine_SJIS(const char GUI_FAR *s, int Len) { 
  U8 c0; 
  while (--Len >=0) { 
    c0=*(U8*)s++; 
    if (c0 > 127) { 
      U8  c1 = *(U8*)s++; 
      Len--; 
      GL_DispChar (DB2SJIS(c0, c1)); 
    } else { 
      GL_DispChar(c0); 
    } 
  } 
} 
 
 
tGUI_ENC_APIList GUI_ENC_APIList_SJIS = { 
  GUI_GetLineDistX_SJIS, 
  GUI_GetLineLen_SJIS, 
  GL_DispLine_SJIS 
};