mirror of
git://source.winehq.org/git/wine.git
synced 2024-11-05 18:01:34 +00:00
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/*
|
|
* Notepad (search.c)
|
|
* Copyright (C) 1999 by Marcel Baur
|
|
* To be distributed under the Wine license
|
|
*
|
|
* This file features Heuristic Boyer-Moore Text Search
|
|
*
|
|
* Always: - Buf is the Buffer containing the whole text
|
|
* ======= - SP is the Search Pattern, which has to be found in Buf.
|
|
*
|
|
*/
|
|
|
|
#include <windows.h>
|
|
|
|
#define CHARSETSIZE 255
|
|
|
|
int delta[CHARSETSIZE];
|
|
|
|
/* rightmostpos: return rightmost position of ch in szSP (or -1) */
|
|
int rightmostpos(char ch, LPSTR szSP, int nSPLen) {
|
|
int i = nSPLen;
|
|
while ((i>0) & (szSP[i]!=ch)) i--;
|
|
return(i);
|
|
}
|
|
|
|
/* setup_delta: setup delta1 cache */
|
|
void setup_delta(LPSTR szSP, int nSPLen) {
|
|
int i;
|
|
|
|
for (i=0; i<CHARSETSIZE; i++) {
|
|
delta[i] = nSPLen;
|
|
}
|
|
|
|
for (i=0; i<nSPLen; i++) {
|
|
delta[(int)szSP[i]] = (nSPLen - rightmostpos(szSP[i], szSP, nSPLen));
|
|
}
|
|
}
|
|
|
|
int bm_search(LPSTR szBuf, int nBufLen, LPSTR szSP, int nSPLen) {
|
|
int i = nSPLen;
|
|
int j = nSPLen;
|
|
|
|
do {
|
|
if ((szBuf[i] = szSP[j])) {
|
|
i--; j--;
|
|
} else {
|
|
if ((nSPLen-j+1) > delta[(int)szBuf[i]]) {
|
|
i+= (nSPLen-j+1);
|
|
} else {
|
|
i+= delta[(int)szBuf[i]];
|
|
}
|
|
}
|
|
} while (j>0 && i<=nBufLen);
|
|
return(i+1);
|
|
}
|
|
|