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-rwxr-xr-xgcc/c-pragma.c452
1 files changed, 0 insertions, 452 deletions
diff --git a/gcc/c-pragma.c b/gcc/c-pragma.c
deleted file mode 100755
index 35379e3..0000000
--- a/gcc/c-pragma.c
+++ /dev/null
@@ -1,452 +0,0 @@
-/* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
- Copyright (C) 1992, 1997, 1998 Free Software Foundation, Inc.
-
-This file is part of GNU CC.
-
-GNU CC 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 CC 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 CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
-
-#include "config.h"
-#include "system.h"
-#include "rtl.h"
-#include "tree.h"
-#include "except.h"
-#include "function.h"
-#include "defaults.h"
-#include "c-pragma.h"
-#include "flags.h"
-#include "toplev.h"
-
-#ifdef HANDLE_GENERIC_PRAGMAS
-
-#ifdef HANDLE_PRAGMA_PACK
-/* When structure field packing is in effect, this variable is the
- number of bits to use as the maximum alignment. When packing is not
- in effect, this is zero. */
-
-extern int maximum_field_alignment;
-#endif
-
-
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
-typedef struct align_stack
-{
- int alignment;
- unsigned int num_pushes;
- struct align_stack * prev;
-} align_stack;
-
-static struct align_stack * alignment_stack = NULL;
-
-static int push_alignment (int);
-static int pop_alignment (void);
-
-/* Push an alignment value onto the stack. */
-static int
-push_alignment (alignment)
- int alignment;
-{
- switch (alignment)
- {
- case 0:
- case 1:
- case 2:
- case 4:
- case 8:
- case 16:
- break;
- default:
- warning ("\
-Alignment must be a small power of two, not %d, in #pragma pack",
- alignment);
- return 0;
- }
-
- if (alignment_stack == NULL
- || alignment_stack->alignment != alignment)
- {
- align_stack * entry;
-
- entry = (align_stack *) xmalloc (sizeof (* entry));
-
- if (entry == NULL)
- {
- warning ("Out of memory pushing #pragma pack");
- return 0;
- }
-
- entry->alignment = alignment;
- entry->num_pushes = 1;
- entry->prev = alignment_stack;
-
- alignment_stack = entry;
-
- if (alignment < 8)
- maximum_field_alignment = alignment * 8;
- else
- /* MSVC ignores alignments > 4. */
- maximum_field_alignment = 0;
- }
- else
- alignment_stack->num_pushes ++;
-
- return 1;
-}
-
-/* Undo a push of an alignment onto the stack. */
-static int
-pop_alignment ()
-{
- if (alignment_stack == NULL)
- {
- warning ("\
-#pragma pack(pop) encountered without corresponding #pragma pack(push,<n>)");
- return 0;
- }
-
- if (-- alignment_stack->num_pushes == 0)
- {
- align_stack * entry;
-
- entry = alignment_stack->prev;
-
- if (entry == NULL || entry->alignment > 4)
- maximum_field_alignment = 0;
- else
- maximum_field_alignment = entry->alignment * 8;
-
- free (alignment_stack);
-
- alignment_stack = entry;
- }
-
- return 1;
-}
-
-/* Generate 'packed' and 'aligned' attributes for decls whilst a
- #pragma pack(push... is in effect. */
-void
-insert_pack_attributes (node, attributes, prefix)
- tree node;
- tree * attributes;
- tree * prefix;
-{
- tree a;
-
- /* If we are not packing, then there is nothing to do. */
- if (maximum_field_alignment == 0
- || alignment_stack == NULL)
- return;
-
- /* We are only interested in fields. */
- if (TREE_CODE_CLASS (TREE_CODE (node)) != 'd'
- || TREE_CODE (node) != FIELD_DECL)
- return;
-
- /* Add a 'packed' attribute. */
- * attributes = tree_cons (get_identifier ("packed"), NULL, * attributes);
-
- /* If the alignment is > 8 then add an alignment attribute as well. */
- if (maximum_field_alignment > 8)
- {
- /* If the aligned attribute is already present then do not override it. */
- for (a = * attributes; a; a = TREE_CHAIN (a))
- {
- tree name = TREE_PURPOSE (a);
- if (strcmp (IDENTIFIER_POINTER (name), "aligned") == 0)
- break;
- }
-
- if (a == NULL)
- for (a = * prefix; a; a = TREE_CHAIN (a))
- {
- tree name = TREE_PURPOSE (a);
- if (strcmp (IDENTIFIER_POINTER (name), "aligned") == 0)
- break;
- }
-
- if (a == NULL)
- {
- * attributes = tree_cons
- (get_identifier ("aligned"),
- tree_cons (NULL,
- build_int_2 (maximum_field_alignment / 8, 0),
- NULL),
- * attributes);
- }
- }
-
- return;
-}
-#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
-
-#ifdef HANDLE_PRAGMA_WEAK
-static int add_weak (char *, char *);
-
-static int
-add_weak (name, value)
- char * name;
- char * value;
-{
- struct weak_syms * weak;
-
- weak = (struct weak_syms *) permalloc (sizeof (struct weak_syms));
-
- if (weak == NULL)
- return 0;
-
- weak->next = weak_decls;
- weak->name = name;
- weak->value = value;
- weak_decls = weak;
-
- return 1;
-}
-#endif /* HANDLE_PRAGMA_WEAK */
-
-/* Handle one token of a pragma directive. TOKEN is the current token, and
- STRING is its printable form. Some front ends do not support generating
- tokens, and will only pass in a STRING. Also some front ends will reuse
- the buffer containing STRING, so it must be copied to a local buffer if
- it needs to be preserved.
-
- If STRING is non-NULL, then the return value will be ignored, and there
- will be futher calls to handle_pragma_token() in order to handle the rest of
- the line containing the #pragma directive. If STRING is NULL, the entire
- line has now been presented to handle_pragma_token() and the return value
- should be zero if the pragma flawed in some way, or if the pragma was not
- recognised, and non-zero if it was successfully handled. */
-
-int
-handle_pragma_token (string, token)
- char * string;
- tree token;
-{
- static enum pragma_state state = ps_start;
- static enum pragma_state type;
- static char * name;
- static char * value;
- static int align;
-
- /* If we have reached the end of the #pragma directive then
- determine what value we should return. */
-
- if (string == NULL)
- {
- int ret_val = 0;
-
- switch (type)
- {
- default:
- abort ();
- break;
-
- case ps_done:
- /* The pragma was not recognised. */
- break;
-
-#ifdef HANDLE_PRAGMA_PACK
- case ps_pack:
- if (state == ps_right)
- {
- maximum_field_alignment = align * 8;
- ret_val = 1;
- }
- else
- warning ("malformed `#pragma pack'");
- break;
-#endif /* HANDLE_PRAGMA_PACK */
-
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- case ps_push:
- if (state == ps_right)
- ret_val = push_alignment (align);
- else
- warning ("incomplete '#pragma pack(push,<n>)'");
- break;
-
- case ps_pop:
- if (state == ps_right)
- ret_val = pop_alignment ();
- else
- warning ("missing closing parenthesis in '#pragma pack(pop)'");
- break;
-#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
-
-#ifdef HANDLE_PRAGMA_WEAK
- case ps_weak:
- if (HANDLE_PRAGMA_WEAK)
- {
- if (state == ps_name)
- ret_val = add_weak (name, NULL);
- else if (state == ps_value)
- ret_val = add_weak (name, value);
- else
- warning ("malformed `#pragma weak'");
- }
- else
- ret_val = 1; /* Ignore the pragma. */
- break;
-#endif /* HANDLE_PRAGMA_WEAK */
- }
-
- type = state = ps_start;
-
- return ret_val;
- }
-
- /* If we have been given a token, but it is not an identifier,
- or a small constant, then something has gone wrong. */
- if (token)
- {
- switch (TREE_CODE (token))
- {
- case IDENTIFIER_NODE:
- break;
-
- case INTEGER_CST:
- if (TREE_INT_CST_HIGH (token) != 0)
- return 0;
- break;
-
- default:
- return 0;
- }
- }
-
- switch (state)
- {
- case ps_start:
- type = state = ps_done;
-#ifdef HANDLE_PRAGMA_PACK
- if (strcmp (string, "pack") == 0)
- type = state = ps_pack;
-#endif
-#ifdef HANDLE_PRAGMA_WEAK
- if (strcmp (string, "weak") == 0)
- type = state = ps_weak;
-#endif
- break;
-
-#ifdef HANDLE_PRAGMA_WEAK
- case ps_weak:
- name = permalloc (strlen (string) + 1);
- if (name == NULL)
- {
- warning ("Out of memory parsing #pragma weak");
- state = ps_bad;
- }
- else
- {
- strcpy (name, string);
- state = ps_name;
- }
- break;
-
- case ps_name:
- state = (strcmp (string, "=") ? ps_bad : ps_equals);
- break;
-
- case ps_equals:
- value = permalloc (strlen (string) + 1);
- if (value == NULL)
- {
- warning ("Out of memory parsing #pragma weak");
- state = ps_bad;
- }
- else
- {
- strcpy (value, string);
- state = ps_value;
- }
- break;
-
- case ps_value:
- state = ps_bad;
- break;
-#endif /* HANDLE_PRAGMA_WEAK */
-
-#ifdef HANDLE_PRAGMA_PACK
- case ps_pack:
- state = (strcmp (string, "(") ? ps_bad : ps_left);
- break;
-
- case ps_left:
-
- if (token && TREE_CODE(token) == INTEGER_CST)
- align = TREE_INT_CST_LOW(token);
- else
- align = atoi (string);
- switch (align)
- {
- case 1:
- case 2:
- case 4:
- state = ps_align;
- break;
-
- case 0:
- state = (strcmp (string, ")") ? ps_bad : ps_right);
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- if (state == ps_bad)
- {
- if (strcmp (string, "push") == 0)
- type = state = ps_push;
- else if (strcmp (string, "pop") == 0)
- type = state = ps_pop;
- }
-#endif
- break;
-
- default:
- state = ps_bad;
- break;
- }
- break;
-
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- case ps_pop:
-#endif
- case ps_align:
- state = (strcmp (string, ")") ? ps_bad : ps_right);
- break;
-
- case ps_right:
- state = ps_bad;
- break;
-#endif /* HANDLE_PRAGMA_PACK */
-
-#ifdef HANDLE_PRAGMA_PACK_PUSH_POP
- case ps_push:
- state = (strcmp (string, ",") ? ps_bad : ps_comma);
- break;
-
- case ps_comma:
- align = atoi (string);
- state = ps_align;
- break;
-#endif /* HANDLE_PRAGMA_PACK_PUSH_POP */
-
- case ps_bad:
- case ps_done:
- break;
-
- default:
- abort ();
- }
-
- return 1;
-}
-#endif /* HANDLE_GENERIC_PRAGMAS */
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