1 /* read.h - of read.c
2    Copyright (C) 1986-2016 Free Software Foundation, Inc.
3 
4    This file is part of GAS, the GNU Assembler.
5 
6    GAS 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 3, or (at your option)
9    any later version.
10 
11    GAS 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.
15 
16    You should have received a copy of the GNU General Public License
17    along with GAS; see the file COPYING.  If not, write to the Free
18    Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
19    02110-1301, USA.  */
20 
21 extern char *input_line_pointer;	/* -> char we are parsing now.  */
22 
23 /* Define to make whitespace be allowed in many syntactically
24    unnecessary places.  Normally undefined.  For compatibility with
25    ancient GNU cc.  */
26 /* #undef PERMIT_WHITESPACE */
27 #define PERMIT_WHITESPACE
28 
29 #ifdef PERMIT_WHITESPACE
30 #define SKIP_WHITESPACE()			\
31   ((*input_line_pointer == ' ') ? ++input_line_pointer : 0)
32 #else
33 #define SKIP_WHITESPACE() know(*input_line_pointer != ' ' )
34 #endif
35 
36 #define SKIP_WHITESPACE_AFTER_NAME()		\
37   do						\
38     {						\
39       if (* input_line_pointer == '"')		\
40 	++ input_line_pointer;			\
41       if (* input_line_pointer == ' ')		\
42 	++ input_line_pointer;			\
43     }						\
44   while (0)
45 
46 #define	LEX_NAME	(1)	/* may continue a name */
47 #define LEX_BEGIN_NAME	(2)	/* may begin a name */
48 #define LEX_END_NAME	(4)	/* ends a name */
49 
50 #define is_name_beginner(c) \
51   ( lex_type[(unsigned char) (c)] & LEX_BEGIN_NAME )
52 #define is_part_of_name(c) \
53   ( lex_type[(unsigned char) (c)] & LEX_NAME       )
54 #define is_name_ender(c) \
55   ( lex_type[(unsigned char) (c)] & LEX_END_NAME   )
56 
57 #ifndef is_a_char
58 #define CHAR_MASK	(0xff)
59 #define NOT_A_CHAR	(CHAR_MASK+1)
60 #define is_a_char(c)	(((unsigned) (c)) <= CHAR_MASK)
61 #endif /* is_a_char() */
62 
63 extern char lex_type[];
64 extern char is_end_of_line[];
65 
66 extern int is_it_end_of_statement (void);
67 extern char *find_end_of_line (char *, int);
68 
69 extern int target_big_endian;
70 
71 /* These are initialized by the CPU specific target files (tc-*.c).  */
72 extern const char comment_chars[];
73 extern const char line_comment_chars[];
74 extern const char line_separator_chars[];
75 
76 /* Table of -I directories.  */
77 extern const char **include_dirs;
78 extern int include_dir_count;
79 extern int include_dir_maxlen;
80 
81 /* The offset in the absolute section.  */
82 extern addressT abs_section_offset;
83 
84 /* The label on a line, used by some of the pseudo-ops.  */
85 extern symbolS *line_label;
86 
87 /* This is used to support MRI common sections.  */
88 extern symbolS *mri_common_symbol;
89 
90 /* True if a stabs line debug statement is currently being emitted.  */
91 extern int outputting_stabs_line_debug;
92 
93 /* Possible arguments to .linkonce.  */
94 enum linkonce_type {
95   LINKONCE_UNSET = 0,
96   LINKONCE_DISCARD,
97   LINKONCE_ONE_ONLY,
98   LINKONCE_SAME_SIZE,
99   LINKONCE_SAME_CONTENTS
100 };
101 
102 #ifndef TC_CASE_SENSITIVE
103 extern char original_case_string[];
104 #endif
105 
106 #ifndef TC_PARSE_CONS_RETURN_TYPE
107 #define TC_PARSE_CONS_RETURN_TYPE bfd_reloc_code_real_type
108 #define TC_PARSE_CONS_RETURN_NONE BFD_RELOC_NONE
109 #endif
110 
111 extern void pop_insert (const pseudo_typeS *);
112 extern unsigned int get_stab_string_offset
113   (const char *string, const char *stabstr_secname);
114 extern void aout_process_stab (int, const char *, int, int, int);
115 extern char *demand_copy_string (int *lenP);
116 extern char *demand_copy_C_string (int *len_pointer);
117 extern char get_absolute_expression_and_terminator (long *val_pointer);
118 extern offsetT get_absolute_expression (void);
119 extern unsigned int next_char_of_string (void);
120 extern void s_mri_sect (char *);
121 extern char *mri_comment_field (char *);
122 extern void mri_comment_end (char *, int);
123 extern void add_include_dir (char *path);
124 extern void cons (int nbytes);
125 extern void demand_empty_rest_of_line (void);
126 extern void emit_expr (expressionS *exp, unsigned int nbytes);
127 extern void emit_expr_with_reloc (expressionS *exp, unsigned int nbytes,
128 				  TC_PARSE_CONS_RETURN_TYPE);
129 extern void emit_expr_fix (expressionS *, unsigned int, fragS *, char *,
130 			   TC_PARSE_CONS_RETURN_TYPE);
131 extern void equals (char *, int);
132 extern void float_cons (int);
133 extern void ignore_rest_of_line (void);
134 #define discard_rest_of_line ignore_rest_of_line
135 extern unsigned output_leb128 (char *, valueT, int);
136 extern void pseudo_set (symbolS * symbolP);
137 extern void read_a_source_file (const char *name);
138 extern void read_begin (void);
139 extern void read_print_statistics (FILE *);
140 extern char *read_symbol_name (void);
141 extern unsigned sizeof_leb128 (valueT, int);
142 extern void stabs_generate_asm_file (void);
143 extern void stabs_generate_asm_lineno (void);
144 extern void stabs_generate_asm_func (const char *, const char *);
145 extern void stabs_generate_asm_endfunc (const char *, const char *);
146 extern void do_repeat (int,const char *,const char *);
147 extern void do_repeat_with_expander (int, const char *, const char *, const char *);
148 extern void end_repeat (int);
149 extern void do_parse_cons_expression (expressionS *, int);
150 
151 extern void generate_lineno_debug (void);
152 
153 extern void s_abort (int) ATTRIBUTE_NORETURN;
154 extern void s_align_bytes (int arg);
155 extern void s_align_ptwo (int);
156 extern void do_align (unsigned int align, char *fill, unsigned int length,
157 		      unsigned int max);
158 extern void bss_alloc (symbolS *, addressT, unsigned);
159 extern offsetT parse_align (int);
160 extern symbolS *s_comm_internal (int, symbolS *(*) (int, symbolS *, addressT));
161 extern symbolS *s_lcomm_internal (int, symbolS *, addressT);
162 extern void s_app_file_string (char *, int);
163 extern void s_app_file (int);
164 extern void s_app_line (int);
165 extern void s_bundle_align_mode (int);
166 extern void s_bundle_lock (int);
167 extern void s_bundle_unlock (int);
168 extern void s_comm (int);
169 extern void s_data (int);
170 extern void s_desc (int);
171 extern void s_else (int arg);
172 extern void s_elseif (int arg);
173 extern void s_end (int arg);
174 extern void s_endif (int arg);
175 extern void s_err (int);
176 extern void s_errwarn (int);
177 extern void s_fail (int);
178 extern void s_fill (int);
179 extern void s_float_space (int mult);
180 extern void s_func (int);
181 extern void s_globl (int arg);
182 extern void s_if (int arg);
183 extern void s_ifb (int arg);
184 extern void s_ifc (int arg);
185 extern void s_ifdef (int arg);
186 extern void s_ifeqs (int arg);
187 extern void s_ignore (int arg);
188 extern void s_include (int arg);
189 extern void s_irp (int arg);
190 extern void s_lcomm (int needs_align);
191 extern void s_lcomm_bytes (int needs_align);
192 extern void s_leb128 (int sign);
193 extern void s_linkonce (int);
194 extern void s_lsym (int);
195 extern void s_macro (int);
196 extern void s_mexit (int);
197 extern void s_mri (int);
198 extern void s_mri_common (int);
199 extern void s_org (int);
200 extern void s_print (int);
201 extern void s_purgem (int);
202 extern void s_rept (int);
203 extern void s_set (int);
204 extern void s_space (int mult);
205 extern void s_stab (int what);
206 extern void s_struct (int);
207 extern void s_text (int);
208 extern void stringer (int append_zero);
209 extern void s_xstab (int what);
210 extern void s_rva (int);
211 extern void s_incbin (int);
212 extern void s_weakref (int);
213