/* scan-decls.c - Extracts declarations from cpp output.
- Copyright (C) 1993 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1995, 1997, 1998,
+ 1999, 2000, 2003 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
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.
+Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Written by Per Bothner <bothner@cygnus.com>, July 1993. */
-#include <stdio.h>
-#include <ctype.h>
-#include "hconfig.h"
+#include "bconfig.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "cpplib.h"
#include "scan.h"
-sstring buf;
-sstring rtype;
-sstring arg_list;
+static void skip_to_closing_brace (cpp_reader *);
+static const cpp_token *get_a_token (cpp_reader *);
int brace_nesting = 0;
prefixed by extern "C". */
int current_extern_C = 0;
+/* Get a token but skip padding. */
+static const cpp_token *
+get_a_token (cpp_reader *pfile)
+{
+ for (;;)
+ {
+ const cpp_token *result = cpp_get_token (pfile);
+ if (result->type != CPP_PADDING)
+ return result;
+ }
+}
+
static void
-skip_to_closing_brace (fp)
- FILE *fp;
+skip_to_closing_brace (cpp_reader *pfile)
{
int nesting = 1;
for (;;)
{
- int c = get_token (fp, &buf);
- if (c == EOF)
+ enum cpp_ttype token = get_a_token (pfile)->type;
+
+ if (token == CPP_EOF)
break;
- if (c == '{')
+ if (token == CPP_OPEN_BRACE)
nesting++;
- if (c == '}' && --nesting == 0)
+ if (token == CPP_CLOSE_BRACE && --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). */
+ reading from FP. It looks for function declarations, and
+ external variable declarations.
+
+ The following grammar (as well as some extra stuff) is recognized:
+
+ declaration:
+ (decl-specifier)* declarator ("," declarator)* ";"
+ decl-specifier:
+ identifier
+ keyword
+ extern "C"
+ declarator:
+ (ptr-operator)* dname [ "(" argument-declaration-list ")" ]
+ ptr-operator:
+ ("*" | "&") ("const" | "volatile")*
+ dname:
+ identifier
+
+Here dname is the actual name being declared.
+*/
int
-scan_decls (fp)
- FILE *fp;
+scan_decls (cpp_reader *pfile, int argc ATTRIBUTE_UNUSED,
+ char **argv ATTRIBUTE_UNUSED)
{
- int c;
int saw_extern, saw_inline;
+ cpp_token prev_id;
+ const cpp_token *token;
new_statement:
- c = get_token (fp, &buf);
+ token = get_a_token (pfile);
+
handle_statement:
current_extern_C = 0;
saw_extern = 0;
saw_inline = 0;
- if (c == '}')
+ if (token->type == CPP_OPEN_BRACE)
{
/* Pop an 'extern "C"' nesting level, if appropriate. */
if (extern_C_braces_length
brace_nesting--;
goto new_statement;
}
- if (c == '{')
+ if (token->type == CPP_OPEN_BRACE)
{
brace_nesting++;
goto new_statement;
}
- if (c == EOF)
+
+ if (token->type == CPP_EOF)
return 0;
- if (c == ';')
+
+ if (token->type == CPP_SEMICOLON)
goto new_statement;
- if (c != IDENTIFIER_TOKEN)
+ if (token->type != CPP_NAME)
goto new_statement;
- rtype.ptr = rtype.base;
- if (SSTRING_LENGTH (&buf) > 16
- && strncmp (buf.base, "__DEFINED_MACRO_", 16) == 0)
- {
- /* For certain interesting macro names, fixproto puts
- #ifdef FOO
- __DEFINED_MACRO_FOO
- #endif
- into the file to be pre-processed. So if we see __DEFINED_MACRO_FOO,
- it means FOO was defined, which we may want to make a note of. */
- recognized_macro (buf.base+16);
- goto new_statement;
- }
- if (strcmp (buf.base, "inline") == 0)
- {
- saw_inline = 1;
- c = get_token (fp, &buf);
- }
- if (strcmp (buf.base, "extern") == 0)
+
+ prev_id.type = CPP_EOF;
+ for (;;)
{
- saw_extern = 1;
- c = get_token (fp, &buf);
- if (c == STRING_TOKEN && strcmp (buf.base, "C") == 0)
+ switch (token->type)
{
- current_extern_C = 1;
- c = get_token (fp, &buf);
- if (c == '{')
+ default:
+ goto handle_statement;
+ case CPP_MULT:
+ case CPP_AND:
+ /* skip */
+ break;
+
+ case CPP_COMMA:
+ case CPP_SEMICOLON:
+ if (prev_id.type != CPP_EOF && saw_extern)
{
- brace_nesting++;
- extern_C_braces[extern_C_braces_length++] = brace_nesting;
- goto new_statement;
+ recognized_extern (&prev_id);
}
- c = get_token (fp, &buf);
- }
- }
- for (;;)
- {
- int followingc = getc (fp); /* char following token in buf */
-
- MAKE_SSTRING_SPACE (&rtype, 1);
- *rtype.ptr = 0;
-
- if (c == IDENTIFIER_TOKEN)
- {
- int nextc = skip_spaces (fp, followingc);
- if (nextc == '(')
+ if (token->type == CPP_COMMA)
+ break;
+ /* ... fall through ... */
+ case CPP_OPEN_BRACE: case CPP_CLOSE_BRACE:
+ goto new_statement;
+
+ case CPP_EOF:
+ return 0;
+
+ case CPP_OPEN_PAREN:
+ /* Looks like this is the start of a formal parameter list. */
+ if (prev_id.type != CPP_EOF)
{
int nesting = 1;
- int func_lineno = source_lineno;
- char *args;
-
- arg_list.ptr = arg_list.base;
+ int have_arg_list = 0;
for (;;)
{
- c = getc (fp);
- if (c == '(')
+ token = get_a_token (pfile);
+ if (token->type == CPP_OPEN_PAREN)
nesting++;
- else if (c == ')')
- if (--nesting == 0)
- break;
- if (c == EOF)
- break;
- if (c == '\n')
+ else if (token->type == CPP_CLOSE_PAREN)
{
- c = ' ';
- source_lineno++;
- lineno++;
+ nesting--;
+ if (nesting == 0)
+ break;
}
- SSTRING_PUT (&arg_list, c);
+ else if (token->type == CPP_EOF)
+ break;
+ else if (token->type == CPP_NAME
+ || token->type == CPP_ELLIPSIS)
+ have_arg_list = 1;
}
- SSTRING_PUT (&arg_list, '\0');
- args = arg_list.base;
- while (*args == ' ')
- args++;
- recognized_function (buf.base,
+ recognized_function (&prev_id, token->line,
(saw_inline ? 'I'
: in_extern_C_brace || current_extern_C
- ? 'F' : 'f'),
- rtype.base, args,
- source_filename.base, func_lineno);
- c = get_token (fp, &buf);
- if (c == '{')
+ ? 'F' : 'f'), have_arg_list);
+ token = get_a_token (pfile);
+ if (token->type == CPP_OPEN_BRACE)
{
/* skip body of (normally) inline function */
- skip_to_closing_brace (fp);
+ skip_to_closing_brace (pfile);
goto new_statement;
}
- goto handle_statement;
+
+ /* skip a possible __attribute__ or throw expression after the
+ parameter list */
+ while (token->type != CPP_SEMICOLON && token->type != CPP_EOF)
+ token = get_a_token (pfile);
+ goto new_statement;
+ }
+ break;
+ case CPP_NAME:
+ /* "inline" and "extern" are recognized but skipped */
+ if (cpp_ideq (token, "inline"))
+ {
+ saw_inline = 1;
}
- else if (nextc == ';' && saw_extern)
+ else if (cpp_ideq (token, "extern"))
{
- recognized_extern (buf.base, rtype.base);
- goto handle_statement;
+ saw_extern = 1;
+ token = get_a_token (pfile);
+ if (token->type == CPP_STRING
+ && token->val.str.len == 1
+ && token->val.str.text[0] == 'C')
+ {
+ current_extern_C = 1;
+ token = get_a_token (pfile);
+ if (token->type == CPP_OPEN_BRACE)
+ {
+ brace_nesting++;
+ extern_C_braces[extern_C_braces_length++]
+ = brace_nesting;
+ goto new_statement;
+ }
+ }
+ else
+ continue;
+ break;
}
- else
- ungetc (nextc, fp);
+ /* This may be the name of a variable or function. */
+ prev_id = *token;
+ break;
}
- else if (followingc != EOF)
- ungetc (followingc, fp);
- if (c == ';' || c == '{' || c == '}' || c == EOF)
- goto handle_statement;
- sstring_append (&rtype, &buf);
- if (followingc == ' ' || followingc == '\t' || followingc == '\n')
- SSTRING_PUT (&rtype, ' ');
- c = get_token (fp, &buf);
+ token = get_a_token (pfile);
}
}
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