78 lines
1.6 KiB
C
78 lines
1.6 KiB
C
/*
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* GT CLIPPER STANDARD HEADER
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*
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* File......: charodd.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......: 24/05/93
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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 1.2 1999/06/02 19:53:28 dholm
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* See ChangeLog entry 19990602-14:50 EDT David G. Holm <dholm@jsd-llc.com>
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*
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* Revision 1.1 1999/06/02 06:32:42 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_CHARODD()
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* $CATEGORY$
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* String
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* $ONELINER$
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* Return a string of all the characters in odd positions
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* $SYNTAX$
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* GT_CharOdd(<cStr>) --> cRet
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* $ARGUMENTS$
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* <cStr> - A character string to extract chars from
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* $RETURNS$
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* cRet - A string of all the chars in odd positions
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* $DESCRIPTION$
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* Return a string consisting of all the characters in odd
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* positions in <cStr1>.
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*
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* NOTE:
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* invalid parameters will return ""
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* $EXAMPLES$
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*
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* ? gt_CharOdd("abcdefghijklm") // prints "acegikm"
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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
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GT_charOdd()
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{
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char *s1, *s2;
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int len, i;
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if (ISCHAR(1)) {
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s1 = _parc(1);
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len = _parclen(1);
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s2 = (char *)_xgrab(len / 2); // grab us some mem to work with
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for (i = 0; i <= len; i += 2)
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s2[i/2] = s1[i] & 0x7f;
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_retc(s2);
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_xfree(s2); // free alloc'ed mem
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} else {
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_retc((char *) NULL); // parameter mismatch - error NullStr
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}
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}
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