157 lines
2.8 KiB
C
157 lines
2.8 KiB
C
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/*++
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Copyright (c) 1997 Microsoft Corporation
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Module Name:
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utils.c
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Abstract:
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Implements various utilities.
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Author:
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Calin Negreanu (calinn) 20-Jan-1999
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Revision History:
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<alias> <date> <comments>
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--*/
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#include "utils.h"
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#define CHARTYPE WORD
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#define PCHARTYPE PWORD
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CHARTYPE
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pGetNextChar (
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PCTSTR Source
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)
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{
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CHARTYPE result;
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#ifdef UNICODE
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result = Source [0];
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#else
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if (IsDBCSLeadByte (Source [0])) {
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result = *((PCHARTYPE)Source);
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} else {
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result = Source [0];
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}
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#endif
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return result;
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}
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CHARTYPE
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pCharLower (
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CHARTYPE ch
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)
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{
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return ((CHARTYPE) (CharLower ((PTSTR) ch)));
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}
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BOOL
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ShIsPatternMatch (
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IN PCTSTR strPat,
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IN PCTSTR strStr
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)
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{
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CHARTYPE chSrc, chPat;
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while (*strStr) {
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chSrc = pCharLower (pGetNextChar (strStr));
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chPat = pCharLower (pGetNextChar (strPat));
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if (chPat == TEXT('*')) {
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// Check if asterisk is at the end. If so, we have a match already.
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chPat = pCharLower (pGetNextChar (CharNext (strPat)));
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if (!chPat)
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return TRUE;
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// Otherwise check if next pattern char matches current char
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if (chPat == chSrc || chPat == TEXT('?')) {
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// do recursive check for rest of pattern
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if (ShIsPatternMatch (CharNext (strPat), strStr))
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return TRUE;
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}
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//
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// Allow any character and continue
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//
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strStr = CharNext (strStr);
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continue;
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}
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if (chPat != TEXT('?')) {
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//
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// if next pattern character is not a question mark, src and pat
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// must be identical.
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//
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if (chSrc != chPat)
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return FALSE;
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}
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//
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// Advance when pattern character matches string character
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//
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strPat = CharNext (strPat);
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strStr = CharNext (strStr);
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}
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//
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// Fail when there is more pattern and pattern does not end in an asterisk
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//
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chPat = pCharLower (pGetNextChar (strPat));
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while (chPat == TEXT('*')) {
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strPat = CharNext (strPat);
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chPat = pCharLower (pGetNextChar (strPat));
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}
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if (chPat) {
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return FALSE;
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}
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return TRUE;
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}
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PCTSTR
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ShGetLastChar (
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IN PCTSTR String,
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IN CHARTYPE Char
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)
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{
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PCTSTR lastCharPtr = NULL;
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while (*String) {
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if (pGetNextChar (String) == Char) {
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lastCharPtr = String;
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}
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String = CharNext (String);
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}
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return lastCharPtr;
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}
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PCTSTR
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ShGetFileNameFromPath (
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IN PCTSTR PathSpec
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)
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{
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PCTSTR p;
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p = ShGetLastChar (PathSpec, TEXT('\\'));
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if (p) {
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p = CharNext (p);
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} else {
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p = PathSpec;
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}
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return p;
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}
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