| 1 | /* macro.h - header file for macro support for gas and gasp |
| 2 | Copyright (C) 1994, 95, 96, 97, 1998 Free Software Foundation, Inc. |
| 3 | |
| 4 | Written by Steve and Judy Chamberlain of Cygnus Support, |
| 5 | sac@cygnus.com |
| 6 | |
| 7 | This file is part of GAS, the GNU Assembler. |
| 8 | |
| 9 | GAS is free software; you can redistribute it and/or modify |
| 10 | it under the terms of the GNU General Public License as published by |
| 11 | the Free Software Foundation; either version 2, or (at your option) |
| 12 | any later version. |
| 13 | |
| 14 | GAS is distributed in the hope that it will be useful, |
| 15 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | You should have received a copy of the GNU General Public License |
| 20 | along with GAS; see the file COPYING. If not, write to the Free |
| 21 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 22 | 02111-1307, USA. */ |
| 23 | |
| 24 | #ifndef MACRO_H |
| 25 | |
| 26 | #define MACRO_H |
| 27 | |
| 28 | #include "ansidecl.h" |
| 29 | #include "sb.h" |
| 30 | |
| 31 | /* Structures used to store macros. |
| 32 | |
| 33 | Each macro knows its name and included text. It gets built with a |
| 34 | list of formal arguments, and also keeps a hash table which points |
| 35 | into the list to speed up formal search. Each formal knows its |
| 36 | name and its default value. Each time the macro is expanded, the |
| 37 | formals get the actual values attatched to them. */ |
| 38 | |
| 39 | /* describe the formal arguments to a macro */ |
| 40 | |
| 41 | typedef struct formal_struct |
| 42 | { |
| 43 | struct formal_struct *next; /* next formal in list */ |
| 44 | sb name; /* name of the formal */ |
| 45 | sb def; /* the default value */ |
| 46 | sb actual; /* the actual argument (changed on each expansion) */ |
| 47 | int index; /* the index of the formal 0..formal_count-1 */ |
| 48 | } |
| 49 | formal_entry; |
| 50 | |
| 51 | /* Other values found in the index field of a formal_entry. */ |
| 52 | #define QUAL_INDEX (-1) |
| 53 | #define NARG_INDEX (-2) |
| 54 | #define LOCAL_INDEX (-3) |
| 55 | |
| 56 | /* describe the macro. */ |
| 57 | |
| 58 | typedef struct macro_struct |
| 59 | { |
| 60 | sb sub; /* substitution text. */ |
| 61 | int formal_count; /* number of formal args. */ |
| 62 | formal_entry *formals; /* pointer to list of formal_structs */ |
| 63 | struct hash_control *formal_hash; /* hash table of formals. */ |
| 64 | } |
| 65 | macro_entry; |
| 66 | |
| 67 | /* Whether any macros have been defined. */ |
| 68 | |
| 69 | extern int macro_defined; |
| 70 | |
| 71 | /* The macro nesting level. */ |
| 72 | |
| 73 | extern int macro_nest; |
| 74 | |
| 75 | extern int buffer_and_nest |
| 76 | PARAMS ((const char *, const char *, sb *, int (*) PARAMS ((sb *)))); |
| 77 | extern void macro_init |
| 78 | PARAMS ((int alternate, int mri, int strip_at, |
| 79 | int (*) PARAMS ((const char *, int, sb *, int *)))); |
| 80 | extern void macro_mri_mode PARAMS ((int)); |
| 81 | extern const char *define_macro |
| 82 | PARAMS ((int idx, sb *in, sb *label, int (*get_line) PARAMS ((sb *)), |
| 83 | const char **namep)); |
| 84 | extern int check_macro PARAMS ((const char *, sb *, int, const char **, |
| 85 | macro_entry **)); |
| 86 | extern void delete_macro PARAMS ((const char *)); |
| 87 | extern const char *expand_irp |
| 88 | PARAMS ((int, int, sb *, sb *, int (*) PARAMS ((sb *)), int)); |
| 89 | |
| 90 | #endif |