81 lines
2.4 KiB
C
81 lines
2.4 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__strcmp.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__strcmp
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*
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* Purpose:
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* Replacement for the strcmp function. The advantage is that it can
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* be called with NULL pointer(s).
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* A NULL string is treated as a an empty string ("").
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* Return value:
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* 0 if identical
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* 1 else
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*/
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int GUI__strcmp(const char GUI_UNI_PTR * s0, const char GUI_UNI_PTR * s1) {
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if (s0 == NULL) {
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s0 = "";
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}
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if (s1 == NULL) {
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s1 = "";
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}
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do {
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if (*s0 != *s1) {
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return 1;
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}
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s1++;
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} while (*++s0);
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if (*s1) {
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return 1; /* Not equal, since s1 is longer than s0 */
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}
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return 0; /* Equal ! */
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}
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/*********************************************************************
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*
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* GUI__strcmp_hp
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*
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* Purpose:
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* Replacement for the strcmp function. The advantage is that it can
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* be called with NULL pointer or 0 handle.
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* A NULL string is treated as a an empty string ("").
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* Return value:
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* 0 if identical
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* 1 else
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*/
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int GUI__strcmp_hp(GUI_HMEM hs0, const char GUI_UNI_PTR * s1) {
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const char* s0 = NULL;
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if (hs0) {
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s0 = (const char*)GUI_ALLOC_h2p(hs0);
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}
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return GUI__strcmp(s0, s1);
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}
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/*************************** End of file ****************************/
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