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Power-Programmierung CD 2 (Tewi)(1994).iso
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lines.c
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1992-07-02
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/*
* usage: lines file_name[s]
*
* LINES Provides a quick count of the number of lines in each of one
* or more files.
*
* input: Any file[s], but most useful if ASCII text.
*
* output: A one line report on the screen of the number of lines in
* each input file.
*
* writeup: MIR TUTORIAL ONE, topic 6
*
* written: Douglas Lowry Mar 07 92
* Copyright (C) 1992 Marpex Inc.
*
* The MIR (Mass Indexing and Retrieval) Tutorials explain detailed
* usage and co-ordination of the MIR family of programs to analyze,
* prepare and index databases (small through gigabyte size), and
* how to build integrated retrieval software around the MIR search
* engine. The fifth of the five MIR tutorial series explains how
* to extend indexing capability into leading edge search-related
* technologies. For more information, GO IBMPRO on CompuServe;
* MIR files are in the DBMS library. The same files are on the
* Canada Remote Systems BBS. A diskette copy of the Introduction
* is available by mail ($10 US... check, Visa or Mastercard);
* diskettes with Introduction, Tutorial ONE software and the
* shareware Tutorial ONE text cost $29. Shareware registration
* for a tutorial is also $29.
*
* E-mail...
* Compuserve 71431,1337
* Internet doug.lowry%canrem.com
* UUCP canrem!doug.lowry
* Others: doug.lowry@canrem.uucp
*
* FAX... 416 963-5677
*
* "Snail mail"... Douglas Lowry, Ph.D.
* Marpex Inc.
* 5334 Yonge Street, #1102
* North York, Ontario
* Canada M2N 6M2
*
* Related database consultation and preparation services are
* available through:
* Innotech Inc., 2001 Sheppard Avenue E., Suite #118,
* North York, Ontario Canada M2J 4Z7
* Tel. 416 492-3838 FAX 416 492-3843
*
* This program is free software; you may redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* (file 05LICENS) along with this program; if not, write to the
* Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
* USA.
*/
#include <stdio.h>
#include <fcntl.h>
#include <sys\types.h>
#include <sys\stat.h>
#include <io.h>
#define repeat for(;;)
typedef enum bool
{ FALSE = 0, TRUE = 1 } Bool ;
#define INTAKE 2048 /* # of bytes in input buffer */
void process(), Usage_();
char *Cmdname_() { return( "lines" ) ; }
/*
* MAIN -
*/
main( argc, argv )
int argc;
char **argv;
{
char c10 ;
int fd, /* file descriptor */
file;
long int line_ct, /* accumulator within file */
grand_total ;
c10 = argv[1][0] ;
if( argc == 1 || c10 == '-' || c10 == '/' || c10 == '?' )
Usage_();
grand_total = 0 ;
for( file = 1 ; file < argc ; file++ )
{
if(( fd = open( argv[ file ], O_RDONLY | O_BINARY )) == -1 )
{
fprintf( stderr, "Can't open file %s\n", argv[ file ] );
continue;
}
process( fd, &line_ct );
printf( "\n%7ld lines in file %s\n", line_ct, argv[file] ) ;
grand_total += line_ct ;
if( close( fd ))
fprintf( stderr, "Problem closing %s\n", argv[ file ] );
}
printf( "\n%7ld lines TOTAL\n", grand_total ) ;
exit( 0 );
}
void
Usage_()
{
fprintf( stderr, "\nusage: %s file_name[s]\n\n\
Provides a quick count of the number of lines in each of one\n\
or more files.\n\n\
input: Any file[s], but most useful if ASCII text.\n\n\
output: A one line report on the screen of the number of lines in\n\
each input file.\n\n", Cmdname_() );
fprintf( stderr, "writeup: MIR TUTORIAL ONE, topic 6\n\n" ) ;
exit( 1 ) ;
}
/*
* PROCESS
*/
void
process( fd, cum )
int fd; /* file descriptor */
long int *cum; /* count of line feeds */
{
unsigned char buf_in[ INTAKE ];
register int buf_len,
i;
*cum = 0;
repeat
{
if ( ( buf_len = read( fd, buf_in, INTAKE ) ) == 0 )
break;
for ( i= 0 ; i < buf_len ; i++ )
{
if( buf_in[ i ] == '\n' )
*cum += 1 ;
}
}
return;
}