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freebsd/contrib/gcc/f/stw.c

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Virgin import of gcc from EGCS 1.1.2
1999-08-26 09:30:50 +00:00
/* stw.c -- Implementation File (module.c template V1.0)
Copyright (C) 1995 Free Software Foundation, Inc.
Contributed by James Craig Burley (burley@gnu.org).
This file is part of GNU Fortran.
GNU Fortran 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, or (at your option)
any later version.
GNU Fortran 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 GNU Fortran; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
Related Modules:
None (despite the name, it doesn't really depend on ffest*)
Description:
Provides abstraction and stack mechanism to track the block structure
of a Fortran program.
Modifications:
*/
/* Include files. */
#include "proj.h"
#include "stw.h"
#include "bld.h"
#include "com.h"
#include "info.h"
#include "lab.h"
#include "lex.h"
#include "malloc.h"
#include "sta.h"
#include "stv.h"
#include "symbol.h"
#include "where.h"
/* Externals defined here. */
ffestw ffestw_stack_top_ = NULL;
/* Simple definitions and enumerations. */
/* Internal typedefs. */
/* Private include files. */
/* Internal structure definitions. */
/* Static objects accessed by functions in this module. */
/* Static functions (internal). */
/* Internal macros. */
/* ffestw_display_state -- DEBUGGING; display current block state
ffestw_display_state(); */
void
ffestw_display_state ()
{
assert (ffestw_stack_top_ != NULL);
if (!ffe_is_ffedebug ())
return;
fprintf (dmpout, "; block %lu, state ", ffestw_stack_top_->blocknum_);
switch (ffestw_stack_top_->state_)
{
case FFESTV_stateNIL:
fputs ("NIL", dmpout);
break;
case FFESTV_statePROGRAM0:
fputs ("PROGRAM0", dmpout);
break;
case FFESTV_statePROGRAM1:
fputs ("PROGRAM1", dmpout);
break;
case FFESTV_statePROGRAM2:
fputs ("PROGRAM2", dmpout);
break;
case FFESTV_statePROGRAM3:
fputs ("PROGRAM3", dmpout);
break;
case FFESTV_statePROGRAM4:
fputs ("PROGRAM4", dmpout);
break;
case FFESTV_statePROGRAM5:
fputs ("PROGRAM5", dmpout);
break;
case FFESTV_stateSUBROUTINE0:
fputs ("SUBROUTINE0", dmpout);
break;
case FFESTV_stateSUBROUTINE1:
fputs ("SUBROUTINE1", dmpout);
break;
case FFESTV_stateSUBROUTINE2:
fputs ("SUBROUTINE2", dmpout);
break;
case FFESTV_stateSUBROUTINE3:
fputs ("SUBROUTINE3", dmpout);
break;
case FFESTV_stateSUBROUTINE4:
fputs ("SUBROUTINE4", dmpout);
break;
case FFESTV_stateSUBROUTINE5:
fputs ("SUBROUTINE5", dmpout);
break;
case FFESTV_stateFUNCTION0:
fputs ("FUNCTION0", dmpout);
break;
case FFESTV_stateFUNCTION1:
fputs ("FUNCTION1", dmpout);
break;
case FFESTV_stateFUNCTION2:
fputs ("FUNCTION2", dmpout);
break;
case FFESTV_stateFUNCTION3:
fputs ("FUNCTION3", dmpout);
break;
case FFESTV_stateFUNCTION4:
fputs ("FUNCTION4", dmpout);
break;
case FFESTV_stateFUNCTION5:
fputs ("FUNCTION5", dmpout);
break;
case FFESTV_stateMODULE0:
fputs ("MODULE0", dmpout);
break;
case FFESTV_stateMODULE1:
fputs ("MODULE1", dmpout);
break;
case FFESTV_stateMODULE2:
fputs ("MODULE2", dmpout);
break;
case FFESTV_stateMODULE3:
fputs ("MODULE3", dmpout);
break;
case FFESTV_stateMODULE4:
fputs ("MODULE4", dmpout);
break;
case FFESTV_stateMODULE5:
fputs ("MODULE5", dmpout);
break;
case FFESTV_stateBLOCKDATA0:
fputs ("BLOCKDATA0", dmpout);
break;
case FFESTV_stateBLOCKDATA1:
fputs ("BLOCKDATA1", dmpout);
break;
case FFESTV_stateBLOCKDATA2:
fputs ("BLOCKDATA2", dmpout);
break;
case FFESTV_stateBLOCKDATA3:
fputs ("BLOCKDATA3", dmpout);
break;
case FFESTV_stateBLOCKDATA4:
fputs ("BLOCKDATA4", dmpout);
break;
case FFESTV_stateBLOCKDATA5:
fputs ("BLOCKDATA5", dmpout);
break;
case FFESTV_stateUSE:
fputs ("USE", dmpout);
break;
case FFESTV_stateTYPE:
fputs ("TYPE", dmpout);
break;
case FFESTV_stateINTERFACE0:
fputs ("INTERFACE0", dmpout);
break;
case FFESTV_stateINTERFACE1:
fputs ("INTERFACE1", dmpout);
break;
case FFESTV_stateSTRUCTURE:
fputs ("STRUCTURE", dmpout);
break;
case FFESTV_stateUNION:
fputs ("UNION", dmpout);
break;
case FFESTV_stateMAP:
fputs ("MAP", dmpout);
break;
case FFESTV_stateWHERETHEN:
fputs ("WHERETHEN", dmpout);
break;
case FFESTV_stateWHERE:
fputs ("WHERE", dmpout);
break;
case FFESTV_stateIFTHEN:
fputs ("IFTHEN", dmpout);
break;
case FFESTV_stateIF:
fputs ("IF", dmpout);
break;
case FFESTV_stateDO:
fputs ("DO", dmpout);
break;
case FFESTV_stateSELECT0:
fputs ("SELECT0", dmpout);
break;
case FFESTV_stateSELECT1:
fputs ("SELECT1", dmpout);
break;
default:
assert ("bad state" == NULL);
break;
}
if (ffestw_stack_top_->top_do_ != NULL)
fputs (" (within DO)", dmpout);
fputc ('\n', dmpout);
}
/* ffestw_init_0 -- Initialize ffestw structures
ffestw_init_0(); */
void
ffestw_init_0 ()
{
ffestw b;
ffestw_stack_top_ = b = (ffestw) malloc_new_kp (malloc_pool_image (),
"FFESTW stack base", sizeof (*b));
b->uses_ = 0; /* catch if anyone uses, kills, &c this
block. */
b->next_ = NULL;
b->previous_ = NULL;
b->top_do_ = NULL;
b->blocknum_ = 0;
b->shriek_ = NULL;
b->state_ = FFESTV_stateNIL;
b->line_ = ffewhere_line_unknown ();
b->col_ = ffewhere_column_unknown ();
}
/* ffestw_kill -- Kill block
ffestw b;
ffestw_kill(b); */
void
ffestw_kill (ffestw b)
{
assert (b != NULL);
assert (b->uses_ > 0);
if (--b->uses_ != 0)
return;
ffewhere_line_kill (b->line_);
ffewhere_column_kill (b->col_);
}
/* ffestw_new -- Create block
ffestw b;
b = ffestw_new(); */
ffestw
ffestw_new ()
{
ffestw b;
b = (ffestw) malloc_new_kp (malloc_pool_image (), "FFESTW", sizeof (*b));
b->uses_ = 1;
return b;
}
/* ffestw_pop -- Pop block off stack
ffestw_pop(); */
ffestw
ffestw_pop ()
{
ffestw b;
ffestw oldb = ffestw_stack_top_;
assert (oldb != NULL);
ffestw_stack_top_ = b = ffestw_stack_top_->previous_;
assert (b != NULL);
if ((ffewhere_line_is_unknown (b->line_) || ffewhere_column_is_unknown (b->col_))
&& (ffesta_tokens[0] != NULL))
{
assert (b->state_ == FFESTV_stateNIL);
if (ffewhere_line_is_unknown (b->line_))
b->line_
= ffewhere_line_use (ffelex_token_where_line (ffesta_tokens[0]));
if (ffewhere_column_is_unknown (b->col_))
b->col_
= ffewhere_column_use (ffelex_token_where_column (ffesta_tokens[0]));
}
return oldb;
}
/* ffestw_push -- Push block onto stack, return its address
ffestw b; // NULL if new block to be obtained first.
ffestw_push(b);
Returns address of block if desired, also updates ffestw_stack_top_
to point to it.
30-Oct-91 JCB 2.0
Takes block as arg, or NULL if new block needed. */
ffestw
ffestw_push (ffestw b)
{
if (b == NULL)
b = ffestw_new ();
b->next_ = NULL;
b->previous_ = ffestw_stack_top_;
b->line_ = ffewhere_line_unknown ();
b->col_ = ffewhere_column_unknown ();
ffestw_stack_top_ = b;
return b;
}
/* ffestw_update -- Update current block line/col info
ffestw_update();
Updates block to point to current statement. */
ffestw
ffestw_update (ffestw b)
{
if (b == NULL)
{
b = ffestw_stack_top_;
assert (b != NULL);
}
if (ffesta_tokens[0] == NULL)
return b;
ffewhere_line_kill (b->line_);
ffewhere_column_kill (b->col_);
b->line_ = ffewhere_line_use (ffelex_token_where_line (ffesta_tokens[0]));
b->col_ = ffewhere_column_use (ffelex_token_where_column (ffesta_tokens[0]));
return b;
}
/* ffestw_use -- Mark extra use of block
ffestw b;
b = ffestw_use(b); // will always return original copy of b
Increments use counter for b. */
ffestw
ffestw_use (ffestw b)
{
assert (b != NULL);
assert (b->uses_ != 0);
++b->uses_;
return b;
}
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