/* scan-decls.c - Extracts declarations from cpp output.
- Copyright (C) 1993 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1995, 1997, 1998,
+ 1999, 2000, 2003, 2004 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.
-/* This filter scans a C source file (actually, the output of cpp).
- It looks for function declaration. For each declaration, it prints:
+ Written by Per Bothner <bothner@cygnus.com>, July 1993. */
- NAME;C;RTYPE;ARGS;FILENAME;LINENO;
-
- NAME is the function's name.
- C is "F" if the declaration is nested inside 'extern "C"' braces;
- otherwise "f".
- RTYPE is the function's return type.
- ARGS is the function's argument list.
- FILENAME and LINENO is where the declarations was seen
- (taking #-directives into account).
-
- Also:
-
- NAME;M;
- indicates that the macro NAME was seen (when invoked from fixproto).
- NAME;X;TYPE;
- indicates that 'extern TYPE NAME;' was seen.
-
- Written by Per Bothner <bothner@cygnus.com>, July 1993.
- */
-
-#include <stdio.h>
-#include <ctype.h>
+#include "bconfig.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "cpplib.h"
#include "scan.h"
-sstring buf;
-sstring rtype;
+static void skip_to_closing_brace (cpp_reader *);
+static const cpp_token *get_a_token (cpp_reader *);
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". */
+ prefixed by extern "C". */
int extern_C_braces_length = 0;
-char extern_C_braces[20];
+/* 20 is not enough anymore on Solaris 9. */
+#define MAX_EXTERN_C_BRACES 200
+char extern_C_braces[MAX_EXTERN_C_BRACES];
#define in_extern_C_brace (extern_C_braces_length>0)
/* True if the function declaration currently being scanned is
- prefixed by extern "C". */
+ 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 (cpp_reader *pfile)
+{
+ int nesting = 1;
+ for (;;)
+ {
+ enum cpp_ttype token = get_a_token (pfile)->type;
+
+ if (token == CPP_EOF)
+ break;
+ if (token == CPP_OPEN_BRACE)
+ nesting++;
+ 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
+ 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
-main ()
+scan_decls (cpp_reader *pfile, int argc ATTRIBUTE_UNUSED,
+ char **argv ATTRIBUTE_UNUSED)
{
- FILE *fp = stdin;
- int c;
- int saw_extern;
+ 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;
- if (c == '}')
+ saw_inline = 0;
+ if (token->type == CPP_OPEN_BRACE)
{
- /* pop an 'extern "C"' nesting level, if appropriate */
+ /* 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 (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)
- {
- fprintf (stdout, "%s;M;\n", buf.base+16);
- goto new_statement;
- }
- 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 */
- 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;
-
- MAKE_SSTRING_SPACE(&rtype, 1);
- *rtype.ptr = 0;
-
- fprintf (stdout, "%s;%s;%s;",
- buf.base,
- in_extern_C_brace || current_extern_C ? "F" : "f",
- rtype.base);
- c = skip_spaces (fp, ' ');
+ int have_arg_list = 0;
+ const struct line_map *map;
+ unsigned int line;
for (;;)
{
- if (c == '(')
+ token = get_a_token (pfile);
+ if (token->type == CPP_OPEN_PAREN)
nesting++;
- else if (c == ')')
- if (--nesting == 0)
- break;
- if (c == EOF)
+ else if (token->type == CPP_CLOSE_PAREN)
+ {
+ nesting--;
+ if (nesting == 0)
+ break;
+ }
+ else if (token->type == CPP_EOF)
break;
- if (c == '\n')
- c = ' ';
- putc (c, stdout);
- c = getc (fp);
+ else if (token->type == CPP_NAME
+ || token->type == CPP_ELLIPSIS)
+ have_arg_list = 1;
+ }
+ map = linemap_lookup (&line_table, token->src_loc);
+ line = SOURCE_LINE (map, token->src_loc);
+ recognized_function (&prev_id, line,
+ (saw_inline ? 'I'
+ : in_extern_C_brace || current_extern_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 (pfile);
+ goto new_statement;
}
- fprintf (stdout, ";%s;%d;\n",
- source_filename.base, source_lineno);
+
+ /* 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;
}
- else if (nextc == ';' && saw_extern)
+ break;
+ case CPP_NAME:
+ /* "inline" and "extern" are recognized but skipped */
+ if (cpp_ideq (token, "inline"))
+ {
+ saw_inline = 1;
+ }
+ else if (cpp_ideq (token, "extern"))
{
- fprintf (stdout, "%s;X;%s;\n", 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;
+ if (extern_C_braces_length >= MAX_EXTERN_C_BRACES)
+ {
+ fprintf (stderr,
+ "Internal error: out-of-bounds index\n");
+ exit (FATAL_EXIT_CODE);
+ }
+ 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);
}
}