1 /* scan-decls.c - Extracts declarations from cpp output.
2 Copyright (C) 1993, 1995, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option) any
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 Written by Per Bothner <bothner@cygnus.com>, July 1993. */
26 static void skip_to_closing_brace
PARAMS ((cpp_reader
*));
28 int brace_nesting
= 0;
30 /* The first extern_C_braces_length elements of extern_C_braces
31 indicate the (brace nesting levels of) left braces that were
32 prefixed by extern "C". */
33 int extern_C_braces_length
= 0;
34 char extern_C_braces
[20];
35 #define in_extern_C_brace (extern_C_braces_length>0)
37 /* True if the function declaration currently being scanned is
38 prefixed by extern "C". */
39 int current_extern_C
= 0;
42 skip_to_closing_brace (pfile
)
48 enum cpp_ttype token
= cpp_get_token (pfile
)->type
;
51 if (token
== CPP_OPEN_BRACE
)
53 if (token
== CPP_CLOSE_BRACE
&& --nesting
== 0)
58 /* This function scans a C source file (actually, the output of cpp),
59 reading from FP. It looks for function declarations, and
60 external variable declarations.
62 The following grammar (as well as some extra stuff) is recognized:
65 (decl-specifier)* declarator ("," declarator)* ";"
71 (ptr-operator)* dname [ "(" argument-declaration-list ")" ]
73 ("*" | "&") ("const" | "volatile")*
77 Here dname is the actual name being declared.
81 scan_decls (pfile
, argc
, argv
)
83 int argc ATTRIBUTE_UNUSED
;
84 char **argv ATTRIBUTE_UNUSED
;
86 int saw_extern
, saw_inline
;
87 const cpp_token
*prev_id
;
88 const cpp_token
*token
;
91 token
= cpp_get_token (pfile
);
97 if (token
->type
== CPP_OPEN_BRACE
)
99 /* Pop an 'extern "C"' nesting level, if appropriate. */
100 if (extern_C_braces_length
101 && extern_C_braces
[extern_C_braces_length
- 1] == brace_nesting
)
102 extern_C_braces_length
--;
106 if (token
->type
== CPP_OPEN_BRACE
)
111 if (token
->type
== CPP_EOF
)
113 cpp_pop_buffer (pfile
);
114 if (CPP_BUFFER (pfile
) == NULL
)
119 if (token
->type
== CPP_SEMICOLON
)
121 if (token
->type
!= CPP_NAME
)
130 goto handle_statement
;
133 case CPP_PLACEMARKER
:
139 if (prev_id
&& saw_extern
)
141 recognized_extern (prev_id
);
143 if (token
->type
== CPP_COMMA
)
145 /* ... fall through ... */
146 case CPP_OPEN_BRACE
: case CPP_CLOSE_BRACE
:
150 cpp_pop_buffer (pfile
);
151 if (CPP_BUFFER (pfile
) == NULL
)
156 /* Looks like this is the start of a formal parameter list. */
160 int have_arg_list
= 0;
163 token
= cpp_get_token (pfile
);
164 if (token
->type
== CPP_OPEN_PAREN
)
166 else if (token
->type
== CPP_CLOSE_PAREN
)
172 else if (token
->type
== CPP_EOF
)
174 else if (token
->type
== CPP_NAME
175 || token
->type
== CPP_ELLIPSIS
)
178 recognized_function (prev_id
,
180 : in_extern_C_brace
|| current_extern_C
181 ? 'F' : 'f'), have_arg_list
,
182 CPP_BUFFER (pfile
)->nominal_fname
);
183 token
= cpp_get_token (pfile
);
184 if (token
->type
== CPP_OPEN_BRACE
)
186 /* skip body of (normally) inline function */
187 skip_to_closing_brace (pfile
);
190 if (token
->type
== CPP_SEMICOLON
)
195 /* "inline" and "extern" are recognized but skipped */
196 if (cpp_ideq (token
, "inline"))
200 else if (cpp_ideq (token
, "extern"))
203 token
= cpp_get_token (pfile
);
204 if (token
->type
== CPP_STRING
205 && token
->val
.str
.len
== 1
206 && token
->val
.str
.text
[0] == 'C')
208 current_extern_C
= 1;
209 token
= cpp_get_token (pfile
);
210 if (token
->type
== CPP_OPEN_BRACE
)
213 extern_C_braces
[extern_C_braces_length
++]
222 /* This may be the name of a variable or function. */
226 token
= cpp_get_token (pfile
);