1 /* Handle #pragma, system V.4 style. Supports #pragma weak and #pragma pack.
2 Copyright (C) 1992 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
28 #ifdef HANDLE_SYSV_PRAGMA
30 /* When structure field packing is in effect, this variable is the
31 number of bits to use as the maximum alignment. When packing is not
32 in effect, this is zero. */
34 extern int maximum_field_alignment
;
36 /* File used for outputting assembler code. */
37 extern FILE *asm_out_file
;
39 /* Handle one token of a pragma directive. TOKEN is the
40 current token, and STRING is its printable form. */
43 handle_pragma_token (string
, token
)
47 static enum pragma_state state
= ps_start
, type
;
56 if (state
== ps_right
)
57 maximum_field_alignment
= align
* 8;
59 warning ("malformed `#pragma pack'");
61 else if (type
== ps_weak
)
63 #ifdef HANDLE_PRAGMA_WEAK
64 if (HANDLE_PRAGMA_WEAK
)
65 handle_pragma_weak (state
, name
, value
);
67 #endif /* HANDLE_PRAMA_WEAK */
70 type
= state
= ps_start
;
77 if (token
&& TREE_CODE (token
) == IDENTIFIER_NODE
)
79 if (strcmp (IDENTIFIER_POINTER (token
), "pack") == 0)
80 type
= state
= ps_pack
;
81 else if (strcmp (IDENTIFIER_POINTER (token
), "weak") == 0)
82 type
= state
= ps_weak
;
84 type
= state
= ps_done
;
87 type
= state
= ps_done
;
91 if (token
&& TREE_CODE (token
) == IDENTIFIER_NODE
)
93 name
= IDENTIFIER_POINTER (token
);
101 state
= (strcmp (string
, "=") ? ps_bad
: ps_equals
);
105 if (token
&& TREE_CODE (token
) == IDENTIFIER_NODE
)
107 value
= IDENTIFIER_POINTER (token
);
119 if (strcmp (string
, "(") == 0)
126 if (token
&& TREE_CODE (token
) == INTEGER_CST
127 && TREE_INT_CST_HIGH (token
) == 0)
128 switch (TREE_INT_CST_LOW (token
))
133 align
= TREE_INT_CST_LOW (token
);
140 else if (! token
&& strcmp (string
, ")") == 0)
150 if (strcmp (string
, ")") == 0)
168 #endif /* HANDLE_SYSV_PRAGMA */