| 1 | /* macro.h - header file for macro support for gas |
| 2 | Copyright (C) 1994-2017 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 3, 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, 51 Franklin Street - Fifth Floor, Boston, MA |
| 22 | 02110-1301, USA. */ |
| 23 | |
| 24 | #ifndef MACRO_H |
| 25 | |
| 26 | #define MACRO_H |
| 27 | |
| 28 | /* Structures used to store macros. |
| 29 | |
| 30 | Each macro knows its name and included text. It gets built with a |
| 31 | list of formal arguments, and also keeps a hash table which points |
| 32 | into the list to speed up formal search. Each formal knows its |
| 33 | name and its default value. Each time the macro is expanded, the |
| 34 | formals get the actual values attached to them. */ |
| 35 | |
| 36 | enum formal_type |
| 37 | { |
| 38 | FORMAL_OPTIONAL, |
| 39 | FORMAL_REQUIRED, |
| 40 | FORMAL_VARARG |
| 41 | }; |
| 42 | |
| 43 | /* Describe the formal arguments to a macro. */ |
| 44 | |
| 45 | typedef struct formal_struct { |
| 46 | struct formal_struct *next; /* Next formal in list. */ |
| 47 | sb name; /* Name of the formal. */ |
| 48 | sb def; /* The default value. */ |
| 49 | sb actual; /* The actual argument (changed on each expansion). */ |
| 50 | int index; /* The index of the formal 0..formal_count - 1. */ |
| 51 | enum formal_type type; /* The kind of the formal. */ |
| 52 | } formal_entry; |
| 53 | |
| 54 | /* Other values found in the index field of a formal_entry. */ |
| 55 | #define QUAL_INDEX (-1) |
| 56 | #define NARG_INDEX (-2) |
| 57 | #define LOCAL_INDEX (-3) |
| 58 | |
| 59 | /* Describe the macro. */ |
| 60 | |
| 61 | typedef struct macro_struct |
| 62 | { |
| 63 | sb sub; /* Substitution text. */ |
| 64 | int formal_count; /* Number of formal args. */ |
| 65 | formal_entry *formals; /* Pointer to list of formal_structs. */ |
| 66 | struct hash_control *formal_hash; /* Hash table of formals. */ |
| 67 | const char *name; /* Macro name. */ |
| 68 | const char *file; /* File the macro was defined in. */ |
| 69 | unsigned int line; /* Line number of definition. */ |
| 70 | } macro_entry; |
| 71 | |
| 72 | /* Whether any macros have been defined. */ |
| 73 | |
| 74 | extern int macro_defined; |
| 75 | |
| 76 | /* The macro nesting level. */ |
| 77 | |
| 78 | extern int macro_nest; |
| 79 | |
| 80 | /* The macro hash table. */ |
| 81 | |
| 82 | extern struct hash_control *macro_hash; |
| 83 | |
| 84 | extern int buffer_and_nest (const char *, const char *, sb *, |
| 85 | size_t (*) (sb *)); |
| 86 | extern void macro_init (int, int, int, |
| 87 | size_t (*) (const char *, size_t, sb *, offsetT *)); |
| 88 | extern void macro_set_alternate (int); |
| 89 | extern void macro_mri_mode (int); |
| 90 | extern const char *define_macro (size_t, sb *, sb *, size_t (*) (sb *), |
| 91 | const char *, unsigned int, const char **); |
| 92 | extern int check_macro (const char *, sb *, const char **, macro_entry **); |
| 93 | extern void delete_macro (const char *); |
| 94 | extern const char *expand_irp (int, size_t, sb *, sb *, size_t (*) (sb *)); |
| 95 | |
| 96 | #endif |