75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
/*
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* $Id$
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*/
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/*
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* GT CLIPPER STANDARD HEADER
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*
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* File......: chrtotal.c
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* Author....: Andy M Leighton
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* BBS.......: The Dark Knight Returns
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* Net/Node..: 050/069
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* User Name.: Andy Leighton
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* Date......: 23/05/93
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* Revision..: 1.00
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*
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* This is an original work by Andy Leighton and is placed in the
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* public domain.
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*/
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/*
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* $DOC$
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* $FUNCNAME$
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* GT_CHRTOTAL()
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* $CATEGORY$
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* String
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* $ONELINER$
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* Find number of times a set of characters appears in a string
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* $SYNTAX$
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* GT_ChrTotal(<cChrs>, <cStr>) --> nTotOcc
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* $ARGUMENTS$
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* <cChrs> - The set of characters
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* <cStr> - The string to search
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* $RETURNS$
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* nTotOcc - The number of times the characters specified in
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* <cChrs> appears in <cStr>
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* $DESCRIPTION$
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* Returns the numnber of occurrences of characters belonging
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* to the set <cChrs> in the string <cStr>. If no characters
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* in <cChrs> appears in <cStr> GT_ChrTotal() will return 0.
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*
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* NOTE:
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* invalid parameters will return -1
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* $EXAMPLES$
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*
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* local cStr1 := "the cat sat on the mat"
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*
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* ? GT_ChrTotal("tae", cStr1) // prints 10
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* ? GT_ChrTotal("zqw", cStr1) // prints 0
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* $END$
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*/
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#include "extend.h"
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HARBOUR HB_GT_CHRTOTAL( void )
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{
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char *s1, *s2;
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int count, p1, p2, l2, l1;
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if (ISCHAR(1) && ISCHAR(2)) {
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s1 = hb_parc(1);
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s2 = hb_parc(2);
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l2 = hb_parclen(2);
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l1 = hb_parclen(1);
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for (count = 0, p2 = 0; p2 < l2; p2++)
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for (p1 = 0; p1 < l1; p1++)
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if (s1[p1] == s2[p2])
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count++; /* increment counter */
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hb_retni(count); /* return result */
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} else {
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hb_retni(-1); /* parameter mismatch - error -1 */
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}
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}
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