gui_addhex.c

来自「arm的几个小实验」· C语言 代码 · 共 43 行

/*
*********************************************************************************************************
*                                                uC/GUI
*                        Universal graphic software for embedded applications
*
*                       (c) Copyright 2002, Micrium Inc., Weston, FL
*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
*
*              礐/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_AddHex.c
Purpose     : Converts hex value 2 string
---------------------------END-OF-HEADER------------------------------
*/

#include "GUI_Protected.H"

/*********************************************************************
*
*        GUI_AddHex
*
**********************************************************************
*/

static const char acHex[16] =  {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

void GUI_AddHex(U32 v, U8 Len, char**ps) {
  char *s = *ps;
  if (Len > 8)
    return;
  (*ps) += Len;
  **ps     = '\0';     /* Make sure string is 0-terminated */
  while(Len--) {
    *(s+Len) = acHex[v&15];
    v>>=4;
  }
}