1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* scan-decls.c - Extracts declarations from cpp output.
Copyright (C) 1993 Free Software Foundation, Inc.
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
Written by Per Bothner <bothner@cygnus.com>, July 1993. */
#include <stdio.h>
#include <ctype.h>
#include "hconfig.h"
#include "cpplib.h"
int brace_nesting = 0;
/* The first extern_C_braces_length elements of extern_C_braces
indicate the (brace nesting levels of) left braces that were
prefixed by extern "C". */
int extern_C_braces_length = 0;
char extern_C_braces[20];
#define in_extern_C_brace (extern_C_braces_length>0)
/* True if the function declaration currently being scanned is
prefixed by extern "C". */
int current_extern_C = 0;
static void
skip_to_closing_brace (pfile)
cpp_reader *pfile;
{
int nesting = 1;
for (;;)
{
enum cpp_token token = cpp_get_token (pfile);
if (token == CPP_EOF)
break;
if (token == CPP_LBRACE)
nesting++;
if (token == CPP_RBRACE && --nesting == 0)
break;
}
}
/* This function scans a C source file (actually, the output of cpp),
reading from FP. It looks for function declarations, and certain
other interesting sequences (external variables and macros). */
int
scan_decls (pfile, argc, argv)
cpp_reader *pfile;
int argc;
char**argv;
{
int saw_extern, saw_inline;
int old_written;
int prev_id_start, prev_id_end;
enum cpp_token token;
new_statement:
CPP_SET_WRITTEN (pfile, 0);
token = cpp_get_token (pfile);
handle_statement:
current_extern_C = 0;
saw_extern = 0;
saw_inline = 0;
if (token == CPP_RBRACE)
{
/* Pop an 'extern "C"' nesting level, if appropriate. */
if (extern_C_braces_length
&& extern_C_braces[extern_C_braces_length - 1] == brace_nesting)
extern_C_braces_length--;
brace_nesting--;
goto new_statement;
}
if (token == CPP_LBRACE)
{
brace_nesting++;
goto new_statement;
}
if (token == CPP_EOF)
return 0;
if (token == CPP_SEMICOLON)
goto new_statement;
if (token != CPP_NAME)
goto new_statement;
if (strcmp (pfile->token_buffer, "inline") == 0)
{
saw_inline = 1;
CPP_SET_WRITTEN (pfile, 0);
token = cpp_get_non_space_token (pfile);
}
if (strcmp (pfile->token_buffer, "extern") == 0)
{
saw_extern = 1;
CPP_SET_WRITTEN (pfile, 0);
token = cpp_get_non_space_token (pfile);
if (token == CPP_STRING
&& strcmp (pfile->token_buffer, "\"C\"") == 0)
{
CPP_SET_WRITTEN (pfile, 0);
current_extern_C = 1;
token = cpp_get_non_space_token (pfile);
if (token == CPP_LPAREN)
{
brace_nesting++;
extern_C_braces[extern_C_braces_length++] = brace_nesting;
goto new_statement;
}
token = cpp_get_non_space_token (pfile);
}
}
prev_id_start = NULL;
for (;;)
{
int start_written = CPP_WRITTEN (pfile);
token = cpp_get_token (pfile);
switch (token)
{
case CPP_LPAREN:
if (prev_id_start)
{
int nesting = 1;
int have_arg_list = 0;
cpp_buffer *fbuf = cpp_file_buffer (pfile);
long func_lineno;
cpp_buf_line_and_col (fbuf, &func_lineno, NULL);
for (;;)
{
token = cpp_get_token (pfile);
if (token == CPP_LPAREN)
nesting++;
else if (token == CPP_RPAREN)
{
nesting--;
if (nesting == 0)
break;
}
else if (token == CPP_EOF)
break;
else if (token == CPP_NAME || token == CPP_3DOTS)
have_arg_list = 1;
}
recognized_function (pfile->token_buffer + prev_id_start,
prev_id_end - prev_id_start,
(saw_inline ? 'I'
: in_extern_C_brace || current_extern_C
? 'F' : 'f'),
pfile->token_buffer, prev_id_start,
have_arg_list,
fbuf->nominal_fname, func_lineno);
token = cpp_get_non_space_token (pfile);
if (token == CPP_LBRACE)
{
/* skip body of (normally) inline function */
skip_to_closing_brace (pfile);
goto new_statement;
}
goto handle_statement;
}
break;
case CPP_SEMICOLON:
if (prev_id_start && saw_extern)
{
recognized_extern (pfile->token_buffer + prev_id_start,
prev_id_end - prev_id_start,
pfile->token_buffer,
prev_id_start);
}
goto new_statement;
case CPP_NAME:
prev_id_start = start_written;
prev_id_end = CPP_WRITTEN (pfile);
break;
case CPP_EOF:
return; /* ??? FIXME */
case CPP_LBRACE: case CPP_RBRACE: case CPP_DIRECTIVE:
goto new_statement; /* handle_statement? */
case CPP_HSPACE: case CPP_VSPACE: case CPP_COMMENT: case CPP_POP:
break;
default:
prev_id_start = NULL;
}
}
}
|
