82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
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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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* Modification history:
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* ---------------------
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*
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* $Log$
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* Revision 1.3 1999/06/12 00:21:56 gdiet
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* ChangeLogTag:Fri Jun 11 19:14:22 1999 Gonzalo A. Diethelm <Gonzalo.Diethelm@jda.cl>
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*
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* Revision 1.2 1999/06/09 18:06:04 dholm
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* See ChangeLog entry 19990609-12:55 EDT David G. Holm <dholm@jsd-llc.com>
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*
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* Revision 1.1 1999/06/02 06:49:38 ajahja
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* Adding GT Library
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*
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*
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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 = _parc(1);
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s2 = _parc(2);
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len = _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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_retni(count); // return result
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} else {
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_retni(-1); // parameter mismatch - error -1
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}
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}
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