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global.c
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C/C++ Source or Header
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1996-09-28
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13KB
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491 lines
/* global.c -- Implementation File (module.c template V1.0)
Copyright (C) 1995 Free Software Foundation, Inc.
Contributed by James Craig Burley (burley@gnu.ai.mit.edu).
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, 675 Mass Ave, Cambridge, MA 02139, USA.
Related Modules:
Description:
Manages information kept across individual program units within a single
source file. This includes reporting errors when a name is defined
multiple times (for example, two program units named FOO) and when a
COMMON block is given initial data in more than one program unit.
Modifications:
*/
/* Include files. */
#include "proj.h"
#include "global.h"
#include "lex.h"
#include "malloc.h"
#include "name.h"
#include "symbol.h"
#include "top.h"
/* Externals defined here. */
/* Simple definitions and enumerations. */
/* Internal typedefs. */
/* Private include files. */
/* Internal structure definitions. */
/* Static objects accessed by functions in this module. */
#if FFEGLOBAL_ENABLED
static ffenameSpace ffeglobal_filewide_ = NULL;
#endif
/* Static functions (internal). */
/* Internal macros. */
/* Call given fn with all globals
ffeglobal (*fn)(ffeglobal g);
ffeglobal_drive(fn); */
#if FFEGLOBAL_ENABLED
void
ffeglobal_drive (ffeglobal (*fn) ())
{
if (ffeglobal_filewide_ != NULL)
ffename_space_drive_global (ffeglobal_filewide_, fn);
}
#endif
/* ffeglobal_new_ -- Make new global
ffename n;
ffeglobal g;
g = ffeglobal_new_(n); */
#if FFEGLOBAL_ENABLED
static ffeglobal
ffeglobal_new_ (ffename n)
{
ffeglobal g;
assert (n != NULL);
g = (ffeglobal) malloc_new_ks (malloc_pool_image (), "FFEGLOBAL",
sizeof (*g));
g->n = n;
#ifdef FFECOM_globalHOOK
g->hook = FFECOM_globalNULL;
#endif
ffename_set_global (n, g);
return g;
}
#endif
/* ffeglobal_init_1 -- Initialize per file
ffeglobal_init_1(); */
void
ffeglobal_init_1 ()
{
#if FFEGLOBAL_ENABLED
if (ffeglobal_filewide_ != NULL)
ffename_space_kill (ffeglobal_filewide_);
ffeglobal_filewide_ = ffename_space_new (malloc_pool_image ());
#endif
}
/* ffeglobal_init_common -- Initial value specified for common block
ffesymbol s; // the ffesymbol for the common block
ffelexToken t; // the token with the point of initialization
ffeglobal_init_common(s,t);
For back ends where file-wide global symbols are not maintained, does
nothing. Otherwise, makes sure this common block hasn't already been
initialized in a previous program unit, and flag that it's been
initialized in this one. */
void
ffeglobal_init_common (ffesymbol s, ffelexToken t)
{
#if FFEGLOBAL_ENABLED
ffeglobal g;
g = ffesymbol_global (s);
if ((g == NULL) || (g->type != FFEGLOBAL_typeCOMMON))
return;
if (g->init == ffe_count_2)
return;
if (g->init != 0)
{
if (g->initt != NULL)
{
ffebad_start (FFEBAD_COMMON_ALREADY_INIT);
ffebad_string (ffesymbol_text (s));
ffebad_here (0, ffelex_token_where_line (t), ffelex_token_where_column (t));
ffebad_here (1, ffelex_token_where_line (g->initt),
ffelex_token_where_column (g->initt));
ffebad_finish ();
}
/* Complain about just one attempt to reinit per program unit, but
continue referring back to the first such successful attempt. */
}
else
{
if (g->blank)
{
ffebad_start (FFEBAD_COMMON_BLANK_INIT);
ffebad_here (0, ffelex_token_where_line (t), ffelex_token_where_column (t));
ffebad_finish ();
}
g->initt = ffelex_token_use (t);
}
g->init = ffe_count_2;
#endif
}
/* ffeglobal_new_common -- New common block
ffesymbol s; // the ffesymbol for the new common block
ffelexToken t; // the token with the name of the common block
bool blank; // TRUE if blank common
ffeglobal_new_common(s,t,blank);
For back ends where file-wide global symbols are not maintained, does
nothing. Otherwise, makes sure this symbol hasn't been seen before or
is known as a common block. */
void
ffeglobal_new_common (ffesymbol s, ffelexToken t, bool blank)
{
#if FFEGLOBAL_ENABLED
ffename n;
ffeglobal g;
if (ffesymbol_global (s) == NULL)
{
n = ffename_find (ffeglobal_filewide_, t);
g = ffename_global (n);
}
else
{
g = ffesymbol_global (s);
n = NULL;
}
if (g != NULL)
{
if (g->type == FFEGLOBAL_typeCOMMON)
{
assert (g->blank == blank);
}
else
{
ffebad_start (FFEBAD_FILEWIDE_ALREADY_SEEN);
ffebad_string (ffelex_token_text (t));
ffebad_here (0, ffelex_token_where_line (t), ffelex_token_where_column (t));
ffebad_here (1, ffelex_token_where_line (g->t),
ffelex_token_where_column (g->t));
ffebad_finish ();
g->type = FFEGLOBAL_typeANY;
}
}
else
{
g = ffeglobal_new_ (n);
g->t = ffelex_token_use (t);
g->init = 0;
g->type = FFEGLOBAL_typeCOMMON;
g->have_pad = FALSE;
g->have_save = FALSE;
g->have_size = FALSE;
g->blank = blank;
}
ffesymbol_set_global (s, g);
#endif
}
/* ffeglobal_new_progunit_ -- New program unit
ffesymbol s; // the ffesymbol for the new unit
ffelexToken t; // the token with the name of the unit
ffeglobalType type; // the type of the new unit
ffeglobal_new_progunit_(s,t,type);
For back ends where file-wide global symbols are not maintained, does
nothing. Otherwise, makes sure this symbol hasn't been seen before. */
void
ffeglobal_new_progunit_ (ffesymbol s, ffelexToken t, ffeglobalType type)
{
#if FFEGLOBAL_ENABLED
ffename n;
ffeglobal g;
n = ffename_find (ffeglobal_filewide_, t);
g = ffename_global (n);
if (g != NULL)
{
ffebad_start (FFEBAD_FILEWIDE_ALREADY_SEEN);
ffebad_string (ffelex_token_text (t));
ffebad_here (0, ffelex_token_where_line (t),
ffelex_token_where_column (t));
ffebad_here (1, ffelex_token_where_line (g->t),
ffelex_token_where_column (g->t));
ffebad_finish ();
g->type = FFEGLOBAL_typeANY;
}
else
{
g = ffeglobal_new_ (n);
g->t = ffelex_token_use (t);
g->type = type;
}
ffesymbol_set_global (s, g);
#endif
}
/* ffeglobal_pad_common -- Check initial padding of common area
ffesymbol s; // the common area
ffetargetAlign pad; // the initial padding
ffeglobal_pad_common(s,pad,ffesymbol_where_line(s),
ffesymbol_where_column(s));
In global-enabled mode, make sure the padding agrees with any existing
padding established for the common area, otherwise complain.
In global-disabled mode, warn about nonzero padding. */
void
ffeglobal_pad_common (ffesymbol s, ffetargetAlign pad, ffewhereLine wl,
ffewhereColumn wc)
{
#if FFEGLOBAL_ENABLED
ffeglobal g;
g = ffesymbol_global (s);
if ((g == NULL) || (g->type != FFEGLOBAL_typeCOMMON))
return; /* Let someone else catch this! */
if (!g->have_pad)
{
g->have_pad = TRUE;
g->pad = pad;
g->pad_where_line = ffewhere_line_use (wl);
g->pad_where_col = ffewhere_column_use (wc);
}
else
{
if (g->pad != pad)
{
char padding_1[20];
char padding_2[20];
sprintf (&padding_1[0], "%" ffetargetAlign_f "u", pad);
sprintf (&padding_2[0], "%" ffetargetAlign_f "u", g->pad);
ffebad_start (FFEBAD_COMMON_DIFF_PAD);
ffebad_string (ffesymbol_text (s));
ffebad_string (padding_1);
ffebad_here (0, wl, wc);
ffebad_string (padding_2);
ffebad_string ((pad == 1)
? FFECOM_SIZE_UNIT : FFECOM_SIZE_UNITS);
ffebad_string ((g->pad == 1)
? FFECOM_SIZE_UNIT : FFECOM_SIZE_UNITS);
ffebad_here (1, g->pad_where_line, g->pad_where_col);
ffebad_finish ();
}
}
#endif
if (pad != 0)
{ /* Warn about initial padding in common area. */
char padding[20];
sprintf (&padding[0], "%" ffetargetAlign_f "u", pad);
ffebad_start (FFEBAD_COMMON_INIT_PAD);
ffebad_string (ffesymbol_text (s));
ffebad_string (padding);
ffebad_string ((pad == 1)
? FFECOM_SIZE_UNIT : FFECOM_SIZE_UNITS);
ffebad_here (0, wl, wc);
ffebad_finish ();
}
}
/* ffeglobal_save_common -- Check SAVE status of common area
ffesymbol s; // the common area
bool save; // TRUE if SAVEd, FALSE otherwise
ffeglobal_save_common(s,save,ffesymbol_where_line(s),
ffesymbol_where_column(s));
In global-enabled mode, make sure the save info agrees with any existing
info established for the common area, otherwise complain.
In global-disabled mode, do nothing. */
void
ffeglobal_save_common (ffesymbol s, bool save, ffewhereLine wl,
ffewhereColumn wc)
{
#if FFEGLOBAL_ENABLED
ffeglobal g;
g = ffesymbol_global (s);
if ((g == NULL) || (g->type != FFEGLOBAL_typeCOMMON))
return; /* Let someone else catch this! */
if (!g->have_save)
{
g->have_save = TRUE;
g->save = save;
g->save_where_line = ffewhere_line_use (wl);
g->save_where_col = ffewhere_column_use (wc);
}
else
{
if ((g->save != save) && ffe_is_pedantic ())
{
ffebad_start (FFEBAD_COMMON_DIFF_SAVE);
ffebad_string (ffesymbol_text (s));
ffebad_here (save ? 0 : 1, wl, wc);
ffebad_here (save ? 1 : 0, g->pad_where_line, g->pad_where_col);
ffebad_finish ();
}
}
#endif
}
/* ffeglobal_size_common -- Establish size of COMMON area
ffesymbol s; // the common area
long size; // size in units
if (ffeglobal_size_common(s,size)) // new size is largest seen
In global-enabled mode, set the size if it current size isn't known or is
smaller than new size, and for non-blank common, complain if old size
is different from new. Return TRUE if the new size is the largest seen
for this COMMON area (or if no size was known for it previously).
In global-disabled mode, do nothing. */
#if FFEGLOBAL_ENABLED
bool
ffeglobal_size_common (ffesymbol s, long size)
{
ffeglobal g;
g = ffesymbol_global (s);
if ((g == NULL) || (g->type != FFEGLOBAL_typeCOMMON))
return FALSE;
if (!g->have_size)
{
g->have_size = TRUE;
g->size = size;
return TRUE;
}
if ((g->size < size) && (g->init > 0) && (g->init < ffe_count_2))
{
char oldsize[40];
char newsize[40];
sprintf (&oldsize[0], "%ld", g->size);
sprintf (&newsize[0], "%ld", size);
ffebad_start (FFEBAD_COMMON_ENLARGED);
ffebad_string (ffesymbol_text (s));
ffebad_string (oldsize);
ffebad_string (newsize);
ffebad_string ((g->size == 1)
? FFECOM_SIZE_UNIT : FFECOM_SIZE_UNITS);
ffebad_string ((size == 1)
? FFECOM_SIZE_UNIT : FFECOM_SIZE_UNITS);
ffebad_here (0, ffelex_token_where_line (g->initt),
ffelex_token_where_column (g->initt));
ffebad_here (1, ffesymbol_where_line (s),
ffesymbol_where_column (s));
ffebad_finish ();
}
else if ((g->size != size) && !g->blank)
{
char oldsize[40];
char newsize[40];
/* Warn about this even if not -pedantic, because putting all
program units in a single source file is the only way to
detect this. Apparently UNIX-model linkers neither handle
nor report when they make a common unit smaller than
requested, such as when the smaller-declared version is
initialized and the larger-declared version is not. So
if people complain about strange overwriting, we can tell
them to put all their code in a single file and compile
that way. Warnings about differing sizes must therefore
always be issued. */
sprintf (&oldsize[0], "%ld", g->size);
sprintf (&newsize[0], "%ld", size);
ffebad_start (FFEBAD_COMMON_DIFF_SIZE);
ffebad_string (ffesymbol_text (s));
ffebad_string (oldsize);
ffebad_string (newsize);
ffebad_string ((g->size == 1)
? FFECOM_SIZE_UNIT : FFECOM_SIZE_UNITS);
ffebad_string ((size == 1)
? FFECOM_SIZE_UNIT : FFECOM_SIZE_UNITS);
ffebad_here (0, ffelex_token_where_line (g->t),
ffelex_token_where_column (g->t));
ffebad_here (1, ffesymbol_where_line (s),
ffesymbol_where_column (s));
ffebad_finish ();
}
if (size > g->size)
{
g->size = size;
return TRUE;
}
return FALSE;
}
#endif
void
ffeglobal_terminate_1 ()
{
}