68 lines
1.1 KiB
C
68 lines
1.1 KiB
C
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/* i4key.c (c)Copyright Sequiter Software Inc., 1990-1994. All rights reserved. */
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#include "d4all.h"
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#ifndef S4UNIX
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#ifdef __TURBOC__
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#pragma hdrstop
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#endif
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#endif
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#ifndef S4INDEX_OFF
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char S4PTR *S4FUNCTION t4key( TAG4 S4PTR *t4 )
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{
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B4BLOCK *b4 ;
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#ifdef S4VBASIC
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if ( c4parm_check( t4->code_base, 1, "t4key():" ) ) return 0 ;
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#endif
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#ifdef S4DEBUG
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if ( t4 == 0 )
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e4severe( e4parm, E4_T4KEY ) ;
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#endif
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if ( t4->code_base->error_code < 0 )
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return 0 ;
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b4 = (B4BLOCK *)(t4->blocks.last_node) ;
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if ( b4 == 0 )
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return 0 ;
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#ifdef S4FOX
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if ( b4->key_on >= b4->header.n_keys ) /* eof */
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#else
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if ( b4->key_on >= b4->n_keys ) /* eof */
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#endif
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return 0 ;
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return (char *)b4key_key( b4, b4->key_on ) ;
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}
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#endif
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#ifdef S4VB_DOS
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char * t4key_v( TAG4 *t4 )
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{
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int len ;
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char *key ;
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#ifdef S4VBASIC
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if ( c4parm_check( t4->code_base, 1, "t4key():" ) ) return 0 ;
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#endif
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StringRelease( basic_desc );
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if( ! (key = t4key(t4)) )
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return basic_desc ;
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StringAssign( key, expr4key_len(t4->expr), basic_desc, 0 );
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return basic_desc ;
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}
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#endif
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