71 lines
1.6 KiB
C
71 lines
1.6 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......: chrcount.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_CHRCOUNT()
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* $CATEGORY$
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* String
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* $ONELINER$
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* Count the number of times a character appears in a string
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* $SYNTAX$
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* GT_ChrCount(<cChr>, <cStr>) --> nFreq
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* $ARGUMENTS$
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* <cChr> - The character to find the frequence of
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* <cStr> - The string in which to find the character
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* $RETURNS$
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* nFreq - The number of times <cChr> occurs in <cStr>
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* $DESCRIPTION$
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* GT_ChrCount() counts how many times a specified character
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* appears in a string.
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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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* ? GT_ChrCount("t", "the cat sat on the mat") // prints 4
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*
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* $END$
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*/
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#include "extend.h"
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HARBOUR HB_GT_CHRCOUNT( void )
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{
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char *s1, *s2;
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int count, pos2, len;
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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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len = hb_parclen(2);
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/* loop through s2 matching passed character (s1) with
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each character of s1 */
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for (count = 0, pos2 = 1; pos2 <= len; s2++, pos2++)
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if (*s1 == *s2) /* character matches s1 */
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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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