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/* Process source files and output type information.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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.
GCC 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 GCC; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
/* A file position, mostly for error messages.
The FILE element may be compared using pointer equality. */
struct fileloc {
const char *file;
int line;
};
/* Kinds of types we can understand. */
enum typekind {
TYPE_SCALAR,
TYPE_STRING,
TYPE_STRUCT,
TYPE_UNION,
TYPE_POINTER,
TYPE_ARRAY,
TYPE_LANG_STRUCT,
TYPE_PARAM_STRUCT
};
/* A way to pass data through to the output end. */
typedef struct options {
struct options *next;
const char *name;
const void *info;
} *options_p;
typedef struct pair *pair_p;
typedef struct type *type_p;
typedef unsigned lang_bitmap;
/* A name and a type. */
struct pair {
pair_p next;
const char *name;
type_p type;
struct fileloc line;
options_p opt;
};
#define NUM_PARAM 10
/* A description of a type. */
struct type {
enum typekind kind;
type_p next;
type_p pointer_to;
enum gc_used_enum {
GC_UNUSED = 0,
GC_USED,
GC_MAYBE_POINTED_TO,
GC_POINTED_TO
} gc_used;
union {
type_p p;
struct {
const char *tag;
struct fileloc line;
pair_p fields;
options_p opt;
lang_bitmap bitmap;
type_p lang_struct;
} s;
char *sc;
struct {
type_p p;
const char *len;
} a;
struct {
type_p stru;
type_p param[NUM_PARAM];
struct fileloc line;
} param_struct;
} u;
};
#define UNION_P(x) \
((x)->kind == TYPE_UNION || \
((x)->kind == TYPE_LANG_STRUCT \
&& (x)->u.s.lang_struct->kind == TYPE_UNION))
#define UNION_OR_STRUCT_P(x) \
((x)->kind == TYPE_UNION \
|| (x)->kind == TYPE_STRUCT \
|| (x)->kind == TYPE_LANG_STRUCT)
/* The one and only TYPE_STRING. */
extern struct type string_type;
/* Variables used to communicate between the lexer and the parser. */
extern int lexer_toplevel_done;
extern struct fileloc lexer_line;
/* Print an error message. */
extern void error_at_line
PARAMS ((struct fileloc *pos, const char *msg, ...)) ATTRIBUTE_PRINTF_2;
/* Combines xmalloc() and vasprintf(). */
extern int xvasprintf PARAMS ((char **, const char *, va_list))
ATTRIBUTE_PRINTF (2, 0);
/* Like the above, but more convenient for quick coding. */
extern char * xasprintf PARAMS ((const char *, ...))
ATTRIBUTE_PRINTF_1;
/* Constructor routines for types. */
extern void do_typedef PARAMS ((const char *s, type_p t, struct fileloc *pos));
extern type_p resolve_typedef PARAMS ((const char *s, struct fileloc *pos));
extern void new_structure PARAMS ((const char *name, int isunion,
struct fileloc *pos, pair_p fields,
options_p o));
extern type_p find_structure PARAMS ((const char *s, int isunion));
extern type_p create_scalar_type PARAMS ((const char *name, size_t name_len));
extern type_p create_pointer PARAMS ((type_p t));
extern type_p create_array PARAMS ((type_p t, const char *len));
extern type_p adjust_field_type PARAMS ((type_p, options_p));
extern void note_variable PARAMS ((const char *s, type_p t, options_p o,
struct fileloc *pos));
extern void note_yacc_type PARAMS ((options_p o, pair_p fields,
pair_p typeinfo, struct fileloc *pos));
/* Lexer and parser routines, most automatically generated. */
extern int yylex PARAMS((void));
extern void yyerror PARAMS ((const char *));
extern int yyparse PARAMS ((void));
extern void parse_file PARAMS ((const char *name));
/* Output file handling. */
/* Structure representing an output file. */
struct outf
{
struct outf *next;
const char *name;
size_t buflength;
size_t bufused;
char *buf;
};
typedef struct outf * outf_p;
/* The output header file that is included into pretty much every
source file. */
extern outf_p header_file;
/* An output file, suitable for definitions, that can see declarations
made in INPUT_FILE and is linked into every language that uses
INPUT_FILE. */
extern outf_p get_output_file_with_visibility
PARAMS ((const char *input_file));
const char *get_output_file_name PARAMS ((const char *));
/* A list of output files suitable for definitions. There is one
BASE_FILES entry for each language. */
extern outf_p base_files[];
/* A bitmap that specifies which of BASE_FILES should be used to
output a definition that is different for each language and must be
defined once in each language that uses INPUT_FILE. */
extern lang_bitmap get_base_file_bitmap PARAMS ((const char *input_file));
/* Print, like fprintf, to O. */
extern void oprintf PARAMS ((outf_p o, const char *S, ...))
ATTRIBUTE_PRINTF_2;
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