/*
*********************************************************************************************************
*                                                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        : GUI_AddDecShift.c
Purpose     : Routines to display values as dec
----------------------------------------------------------------------
*/

#include "GUI_Protected.h"
#include "GUIDebug.h"
#include "string.h"

/*********************************************************************
*
*       Public data
*
**********************************************************************
*/

const U32 GUI_Pow10[10] = {
  1 , 10, 100, 1000, 10000,
  100000, 1000000, 10000000, 100000000, 1000000000
};

/*********************************************************************
*
*       Static routines
*
**********************************************************************
*/
/*********************************************************************
*
*       _Check_NegLong
*/
static int _Check_NegLong(I32 *pv, char**ps) {
  if (*pv < 0) {
    *(*ps)++ = '-';
    *pv = -*pv;
    return 1;
  }
  return 0;
}

/*********************************************************************
*
*       Module internal routines
*
**********************************************************************
*/
/*********************************************************************
*
*       GUI_Long2Len
*/
int GUI_Long2Len(I32 vSign) {
  int Len = 1;
  I32 v = (vSign > 0) ? vSign : -vSign;
  while (( ((U32)v) >= GUI_Pow10[Len]) && (Len < 9)) {
    Len++;
  }
  if (vSign < 0) {
		Len++;
  }
  return Len;
}

/*********************************************************************
*
*       GUI_AddSign
*/
long GUI_AddSign(long v, char**ps) {
  char c;
  if (v < 0) {
    c = '-';
    v = -v;
  } else {
    c = '+';
  }
  *(*ps)++ = c;
  **ps     = '\0';
  return v;
}

/*********************************************************************
*
*       Public routines
*
**********************************************************************
*/
/*********************************************************************
*
*       GUI_AddDecShift
*/
void GUI_AddDecShift(I32 v, U8 Len, U8 Shift, char**ps) {
  char c;
  long d;
  #ifndef _CM16C
    Len -= _Check_NegLong(&v, ps); /* TASKING: Tool internal error S003: asertion failed - please report */
  #else
    if (v < 0) {
      *(*ps)++ = '-';
      v = -v;
    }
  #endif
  if (Shift) {
    Len--;
  }
#if GUI_DEBUG_LEVEL >1
  if (Len > 9) {
    Len = 9;
    GUI_DEBUG_ERROROUT("Can not display more than 9 dec. digits");
  }
#endif
  if ((U32)v >= GUI_Pow10[Len])
	v = GUI_Pow10[Len] - 1;
  while (Len) {
    if (Len-- == Shift)
      *(*ps)++ = GUI_DecChar;
    d = GUI_Pow10[Len];
    c = (char) (v / d);
    v -= c * d;
    *(*ps)++ = c + '0';
  }
  **ps = 0;
}

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