68 lines
1.3 KiB
C
68 lines
1.3 KiB
C
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/*
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* implementation of MSDEVS extensions to string.h
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*
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* Copyright 1999 Corel Corporation (Albert den Haan)
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*/
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/* WARNING: The Wine declarations are in tchar.h for now since string.h is
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* not available to be altered in most development environments. MSDEVS 5
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* declarse these functions in its own "string.h" */
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#include "tchar.h"
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#include <ctype.h>
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#include <assert.h>
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char *_strlwr(char *string) {
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char *cp;
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assert(string != NULL);
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for(cp = string; *cp; cp++) {
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*cp = tolower(*cp);
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}
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return string;
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}
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char *_strrev(char *string) {
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char *pcFirst, *pcLast;
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assert(string != NULL);
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pcFirst = pcLast = string;
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/* find the last character of the string
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* (i.e. before the assumed nul-character) */
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while(*(pcLast + 1)) {
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pcLast++;
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}
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/* if the following ASSERT fails look for a bad (i.e. not nul-terminated)
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* string */
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assert(pcFirst <= pcLast);
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/* reverse the string */
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while(pcFirst < pcLast) {
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/* swap characters across the middle */
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char cTemp = *pcFirst;
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*pcFirst = *pcLast;
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*pcLast = cTemp;
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/* move towards the middle of the string */
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pcFirst++;
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pcLast--;
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}
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return string;
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}
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char *_strupr(char *string) {
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char *cp;
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assert(string != NULL);
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for(cp = string; *cp; cp++) {
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*cp = toupper(*cp);
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}
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return string;
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}
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