79 lines
1.6 KiB
C
79 lines
1.6 KiB
C
/*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* GT CLIPPER STANDARD HEADER
|
|
*
|
|
* File......: chrfirst.c
|
|
* Author....: Andy M Leighton
|
|
* BBS.......: The Dark Knight Returns
|
|
* Net/Node..: 050/069
|
|
* User Name.: Andy Leighton
|
|
* Date......: 23/05/93
|
|
* Revision..: 1.00
|
|
*
|
|
* This is an original work by Andy Leighton and is placed in the
|
|
* public domain.
|
|
*/
|
|
|
|
/*
|
|
* $DOC$
|
|
* $FUNCNAME$
|
|
* GT_CHRFIRST()
|
|
* $CATEGORY$
|
|
* String
|
|
* $ONELINER$
|
|
* Find which character occurs first in a string
|
|
* $SYNTAX$
|
|
* GT_ChrFirst(<cChars>, <cStr>) --> nAsc
|
|
* $ARGUMENTS$
|
|
* <cChars> - The set of characters to find
|
|
* <cStr> - The input string
|
|
* $RETURNS$
|
|
* nAsc - The ASCII value of the first character in <cChars>
|
|
* which appears first in <cStr>
|
|
* $DESCRIPTION$
|
|
* Return the ascii value of a character in <cChars>
|
|
* which appears first in <cStr>.
|
|
* $EXAMPLES$
|
|
*
|
|
* ? chr(GT_ChrFirst("sa ", "This is a test")) // prints "s"
|
|
* ? chr(GT_ChrFirst("et", "This is a test")) // prints "t"
|
|
*
|
|
* $END$
|
|
*/
|
|
|
|
#include "extend.h"
|
|
|
|
HARBOUR HB_GT_CHRFIRST( void )
|
|
{
|
|
char *string;
|
|
char *cset;
|
|
int l1, l2;
|
|
int p1, p2;
|
|
|
|
if (ISCHAR(1) && ISCHAR(2)) {
|
|
string = hb_parc(2);
|
|
cset = hb_parc(1);
|
|
l1 = hb_parclen(2);
|
|
l2 = hb_parclen(1);
|
|
p1 = p2 = 0;
|
|
|
|
do {
|
|
for (p2 = 0; (p2 < l2) && (cset[p2] != string[p1]); ++p2)
|
|
;
|
|
if (p2 < l2) {
|
|
hb_retni(string[p1]);
|
|
break;
|
|
}
|
|
} while (p1++ < l1);
|
|
|
|
if (p2 >= l2)
|
|
hb_retni(0);
|
|
|
|
} else {
|
|
hb_retni(-1); /* parameter mismatch - error NullStr */
|
|
}
|
|
}
|