94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
/*
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*********************************************************************************************************
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* uC/GUI
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* Universal graphic software for embedded applications
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*
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* (c) Copyright 2002, Micrium Inc., Weston, FL
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* (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH
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*
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* µC/GUI is protected by international copyright laws. Knowledge of the
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* source code may not be used to write a similar product. This file may
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* only be used in accordance with a license and should not be redistributed
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* in any way. We appreciate your understanding and fairness.
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*
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----------------------------------------------------------------------
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File : GUI__memset16.c
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Purpose : Implementation of said function
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---------------------------END-OF-HEADER------------------------------
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*/
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#include <stddef.h> /* needed for definition of NULL */
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#include "GUI_Protected.h"
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/*********************************************************************
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*
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* public code
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*
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**********************************************************************
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*/
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/*********************************************************************
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*
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* GUI__memset
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*
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* Purpose:
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* Equivalent to the memset function, for 16 bit Data.
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*/
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void GUI__memset16(U16 * p, U16 Fill, int NumWords) {
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/* Code for 16 bit CPUs */
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if (sizeof(int) == 2) { /* May some compilers generate a warning at this line: Condition is alwaws true/false */
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if (NumWords >= 8) { /* May some compilers generate a warning at this line: Unreachable code */
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*p++ = Fill;
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*p++ = Fill;
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*p++ = Fill;
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*p++ = Fill;
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*p++ = Fill;
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*p++ = Fill;
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*p++ = Fill;
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*p++ = Fill;
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NumWords -= 8;
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}
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while (NumWords) {
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*p++ = Fill;
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NumWords--;
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}
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} else {
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int NumInts; /* May some compilers generate a warning at this line: Unreachable code */
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/* Write 16 bit until we are done or have reached an int boundary */
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if (2 & (U32)p) {
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*p++ = Fill;
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NumWords--;
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}
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/* Write Ints */
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NumInts = (unsigned)NumWords / (sizeof(int) / 2);
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if (NumInts) {
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int FillInt;
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int *pInt;
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FillInt = Fill * 0x10001;
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pInt = (int*)p;
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/* Fill large amount of data at a time */
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if (NumInts >= 4) {
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do {
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*pInt = FillInt;
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*(pInt + 1) = FillInt;
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*(pInt + 2) = FillInt;
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*(pInt + 3) = FillInt;
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pInt += 4;
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} while ((NumInts -= 4) >= 4);
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}
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/* Fill one int at a time */
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while (NumInts) {
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*pInt++ = FillInt;
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NumInts--;
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}
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p = (U16*)pInt;
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}
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/* Fill the remainder */
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if (NumWords & 1) {
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*p = Fill;
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}
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}
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}
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/*************************** End of file ****************************/
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