90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
/*
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* GT CLIPPER STANDARD HEADER
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*
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* File......: chrfirst.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_CHRFIRST()
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* $CATEGORY$
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* String
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* $ONELINER$
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* Find which character occurs first in a string
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* $SYNTAX$
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* GT_ChrFirst(<cChars>, <cStr>) --> nAsc
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* $ARGUMENTS$
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* <cChars> - The set of characters to find
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* <cStr> - The input string
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* $RETURNS$
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* nAsc - The ASCII value of the first character in <cChars>
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* which appears first in <cStr>
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* $DESCRIPTION$
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* Return the ascii value of a character in <cChars>
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* which appears first in <cStr>.
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* $EXAMPLES$
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*
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* ? chr(GT_ChrFirst("sa ", "This is a test")) // prints "s"
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* ? chr(GT_ChrFirst("et", "This is a test")) // prints "t"
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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_CHRFIRST( void )
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{
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char *string;
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char *cset;
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int l1, l2;
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int p1, p2;
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if (ISCHAR(1) && ISCHAR(2)) {
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string = _parc(2);
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cset = _parc(1);
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l1 = _parclen(2);
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l2 = _parclen(1);
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p1 = p2 = 0;
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do {
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for (p2 = 0; (p2 < l2) && (cset[p2] != string[p1]); ++p2)
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;
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if (p2 < l2) {
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_retni(string[p1]);
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break;
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}
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} while (p1++ < l1);
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if (p2 >= l2)
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_retni(0);
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} else {
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_retni(-1); // parameter mismatch - error NullStr
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}
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}
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