#!/bin/sh
# This is a shar archive.
# The rest of this file is a shell script which will extract:
#
# 8_9a1.h 8_9a2.c 8_9a3.c 8_9a4.c 8_9a5.c 8_9b1.h 8_9b2.c 8_9b3.c 8_9b4.c 8_9b5.c 8_9c1.h 8_9c2.c 8_9c3.c 8_9c4.c 8_9c5.c 8_9tst.c makefile tst.cmp tst.data tst.save tst2.cmp
#
# To extract the files from this shell archive file simply
# create a directory for this file, move the archive file
# to it and enter the command
#
#	sh filename
# 
# The files will be extracted automatically.
# Note: Do not use csh.
#
# Archive created: Mon Jul 30 23:13:55 EDT 1990
#
echo x - 8_9a1.h
sed 's/^X//' > 8_9a1.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
class eFILE
{
    long fileoffset;
    FILE *fp;
    eFILE() { };

public:
    friend eFILE *efopen(char *file);
    friend void efclose(eFILE *efp);
    friend int egetc(eFILE *efp, long offset);
    friend int eputc(eFILE *efp, long offset, int newc);
};
!EOF!
ls -l 8_9a1.h
echo x - 8_9a2.c
sed 's/^X//' > 8_9a2.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
eFILE *efopen(char *file)
{
    FILE *fp = fopen(file, "r+");
    if (!fp)
	return 0;

    eFILE *e = new eFILE;
    e->fp = fp;
    e->fileoffset = 0;
    return e;
}
!EOF!
ls -l 8_9a2.c
echo x - 8_9a3.c
sed 's/^X//' > 8_9a3.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
void efclose(eFILE *efp)
{
    if (efp && efp->fp)
	fclose(efp->fp);

    delete efp;
}
!EOF!
ls -l 8_9a3.c
echo x - 8_9a4.c
sed 's/^X//' > 8_9a4.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
int egetc(eFILE *efp, long offset)
{
    if (!efp || !efp->fp)
	return EOF;

    if (offset != efp->fileoffset)
	if (fseek(efp->fp, offset, 0))
	    return EOF;

    int c = getc(efp->fp);
    if (c == EOF)
	efp->fileoffset = offset;

    else
	efp->fileoffset = offset + 1;

    return c;
}
!EOF!
ls -l 8_9a4.c
echo x - 8_9a5.c
sed 's/^X//' > 8_9a5.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
int eputc(eFILE *efp, long offset, int newc)
{
    if (!efp || !efp->fp)
	return EOF;

    if (offset != efp->fileoffset)
	if (fseek(efp->fp, offset, 0))
	    return EOF;

    int ret = putc(newc, efp->fp);
    if (ret == EOF)
	efp->fileoffset = offset;

    else
	efp->fileoffset = offset + 1;

    return ret;
}
!EOF!
ls -l 8_9a5.c
echo x - 8_9b1.h
sed 's/^X//' > 8_9b1.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
class randomloc
{
    eFILE *efp;
    long thisoffset;

public:
    randomloc(eFILE*, long);
    operator int();
    randomloc operator=(int newc);
    randomloc operator=(randomloc r);
};
!EOF!
ls -l 8_9b1.h
echo x - 8_9b2.c
sed 's/^X//' > 8_9b2.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
randomloc::randomloc(eFILE *rfp, long offset)
{
    efp = rfp;
    thisoffset = offset;
}
!EOF!
ls -l 8_9b2.c
echo x - 8_9b3.c
sed 's/^X//' > 8_9b3.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
randomloc::operator int()
{
    return egetc(efp, thisoffset);
}
!EOF!
ls -l 8_9b3.c
echo x - 8_9b4.c
sed 's/^X//' > 8_9b4.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
randomloc randomloc::operator=(int newc)
{
    (void) eputc(efp, thisoffset, newc);
    return *this;
}
!EOF!
ls -l 8_9b4.c
echo x - 8_9b5.c
sed 's/^X//' > 8_9b5.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
randomloc randomloc::operator=(randomloc r)
{
    return (*this = (int) r);
}
!EOF!
ls -l 8_9b5.c
echo x - 8_9c1.h
sed 's/^X//' > 8_9c1.h << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
class random
{
    eFILE *rfp;

public:
    random(char *filename);
    ~random();
    int openedokay();
    randomloc operator[](long offset);
};
!EOF!
ls -l 8_9c1.h
echo x - 8_9c2.c
sed 's/^X//' > 8_9c2.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
random::random(char *filename)
{
    rfp = efopen(filename);
}
!EOF!
ls -l 8_9c2.c
echo x - 8_9c3.c
sed 's/^X//' > 8_9c3.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
random::~random()
{
    efclose(rfp);
}
!EOF!
ls -l 8_9c3.c
echo x - 8_9c4.c
sed 's/^X//' > 8_9c4.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
int random::openedokay()
{
    return rfp != 0;
}
!EOF!
ls -l 8_9c4.c
echo x - 8_9c5.c
sed 's/^X//' > 8_9c5.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
randomloc random::operator[](long offset)
{
    randomloc ret(rfp, offset);
    return ret;
}
!EOF!
ls -l 8_9c5.c
echo x - 8_9tst.c
sed 's/^X//' > 8_9tst.c << '!EOF!'
/* Copyright (c) 1990 by AT&T Bell Telephone Laboratories, Incorporated. */
/* The C++ Answer Book */
/* Tony Hansen */
/* All rights reserved. */
#include <stream.h>
#include <ctype.h>

#include "8_9a1.h"	/* class eFILE */
#include "8_9a2.c"	/* eFILE *efopen(char*) */
#include "8_9a3.c"	/* efclose(eFILE*) */
#include "8_9a4.c"	/* int egetc(eFILE*, long) */
#include "8_9a5.c"	/* int eputc(eFILE*, long, int) */
#include "8_9b1.h"	/* class randomloc */
#include "8_9b2.c"	/* randomloc::randomloc */
#include "8_9b3.c"	/* randomloc::operator int() */
#include "8_9b4.c"	/* randomloc operator=(randomloc, int) */
#include "8_9b5.c"	/* randomloc operator=(randomloc, randomloc) */
#include "8_9c1.h"	/* class random */
#include "8_9c2.c"	/* random::random() */
#include "8_9c3.c"	/* random::~random() */
#include "8_9c4.c"	/* int random::openedokay() */
#include "8_9c5.c"	/* randomloc random::operator[]() */

int main(int, char**)
{
    random x("tst.data");

    int i = x[3];
    cout << "x[3] = " << i;
    if (isprint(i)) cout << ", " << chr(i);
    cout << "\n";

    if ((int)x[2])
	cout << "if x[2] passed\n";
    else
	cout << "if x[2] failed\n";

    x[1] = '3';
    cout << "assigned x[1] <- '3'\n";

    x[0] = x[9];
    cout << "assigned x[0] <- x[8]\n";
    return 0;
}
!EOF!
ls -l 8_9tst.c
echo x - makefile
sed 's/^X//' > makefile << '!EOF!'
CC= CC -I. -I../../CC

all: 8_9tst

8_9tst: 8_9a1.h 8_9b1.h 8_9c1.h 8_9a2.c 8_9a3.c 8_9a4.c 8_9a5.c 8_9b2.c 8_9b3.c 8_9b4.c 8_9b5.c 8_9c2.c 8_9c3.c 8_9c4.c 8_9c5.c 8_9tst.c
	$(CC) 8_9tst.c -o 8_9tst

CMP= tst.cmp tst2.cmp
OUT= tst.out

tst.out: 8_9tst tst.data
	cp tst.save tst.data
	8_9tst > tst.out

test: $(CMP) $(OUT)
	cmp tst.out tst.cmp
	cmp tst.data tst2.cmp
	@echo test done
!EOF!
ls -l makefile
echo x - tst.cmp
sed 's/^X//' > tst.cmp << '!EOF!'
x[3] = 116, t
if x[2] passed
assigned x[1] <- '3'
assigned x[0] <- x[8]
!EOF!
ls -l tst.cmp
echo x - tst.data
sed 's/^X//' > tst.data << '!EOF!'
o3ot::0:root
other::1:
bin::2:root,bin,daemon
sys::3:root,bin,sys,adm
adm::4:root,adm,daemon
uucp::5:root,uucp
mail::6:root
daemon::12:root,daemon
docx::21:pcor,russak,mds,dsl,jeremy,bwp,hansen,coleman,chu,jack
guest::22:
!EOF!
ls -l tst.data
echo x - tst.save
sed 's/^X//' > tst.save << '!EOF!'
root::0:root
other::1:
bin::2:root,bin,daemon
sys::3:root,bin,sys,adm
adm::4:root,adm,daemon
uucp::5:root,uucp
mail::6:root
daemon::12:root,daemon
docx::21:pcor,russak,mds,dsl,jeremy,bwp,hansen,coleman,chu,jack
guest::22:
!EOF!
ls -l tst.save
echo x - tst2.cmp
sed 's/^X//' > tst2.cmp << '!EOF!'
o3ot::0:root
other::1:
bin::2:root,bin,daemon
sys::3:root,bin,sys,adm
adm::4:root,adm,daemon
uucp::5:root,uucp
mail::6:root
daemon::12:root,daemon
docx::21:pcor,russak,mds,dsl,jeremy,bwp,hansen,coleman,chu,jack
guest::22:
!EOF!
ls -l tst2.cmp
# The following exit is to ensure that extra garbage 
# after the end of the shar file will be ignored.
exit 0