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/*
* sf-rmdel.cc: Part of GNU CSSC.
*
*
* Copyright (C) 1997,1999,2001 Free Software Foundation, Inc.
*
* This program is free software; you can 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
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*
* CSSC was originally Based on MySC, by Ross Ridge, which was
* placed in the Public Domain.
*
*
* Members of the class sccs_file used for marking a delta in the SCCS
* files as removed.
*
*/
#include "cssc.h"
#include "sccsfile.h"
#include "delta.h"
#include "delta-iterator.h"
#include "linebuf.h"
#ifdef CONFIG_SCCS_IDS
static const char rcs_id[] = "CSSC $Id: sf-rmdel.cc,v 1.16 2003/03/01 15:38:26 james_youngman Exp $";
#endif
static int
is_seqlist_member(seq_no seq, mylist<seq_no> const &seq_list) {
int i;
int len = seq_list.length();
for(i = 0; i < len; i++) {
if (seq == seq_list[i]) {
return 1;
}
}
return 0;
}
typedef enum { COPY, DELETE, INSERT} update_state;
static int
next_state(update_state& current, // this arg is MODIFIED!
int key)
{
if (current == COPY)
{
switch (key)
{
case 'I':
current = INSERT;
return 1;
case 'D':
current = DELETE;
return 1;
}
}
else
{
if ('E' == key)
{
current = COPY;
return 1;
}
}
return 0; // not expected.
}
bool
sccs_file::rmdel(sid id)
{
if (!edit_mode_ok(true))
return false;
delta *d = find_delta(id);
if (0 == d)
{
errormsg("%s: Specified SID not found in SCCS file.", name.c_str());
return false;
}
seq_no seq = d->seq;
const_delta_iterator iter(delta_table);
while (iter.next())
{
if (iter->prev_seq == seq)
{
errormsg("%s: Specified SID has a successor.", name.c_str());
return false;
}
if (is_seqlist_member(seq, iter->included)
|| is_seqlist_member(seq, iter->excluded)
|| is_seqlist_member(seq, iter->ignored))
{
errormsg("%s: Specified SID is used in another delta.",
name.c_str());
return false;
}
}
d->type = 'R';
FILE *out = start_update();
if (NULL == out)
return false;
if (write(out))
{
xfile_error("Write error.");
return false;
}
update_state state = COPY;
int c;
bool retval = true;
while ( (c=read_line()) != -1)
{
if (0 != c)
{
check_arg();
if (strict_atous(plinebuf->c_str() + 3) == seq)
{
if (!next_state(state, c))
{
corrupt("Unexpected control line");
retval = false;
break;
}
}
else if (state == INSERT)
{
corrupt("Non-terminal delta!?!");
retval = false;
break;
}
else
{
fputs(plinebuf->c_str(), out);
putc('\n', out);
}
}
else if (state != INSERT)
{
fputs(plinebuf->c_str(), out);
putc('\n', out);
}
}
// We should end the file after an 'E', that is,
// in the 'COPY' state.
if (state != COPY)
{
corrupt("Unexpected EOF");
return false;
}
// Only finish write out the file if we had no problem.
if (true == retval)
{
retval = end_update(&out);
}
return retval;
}
/* Local variables: */
/* mode: c++ */
/* End: */
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