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emacs/lib-src/ebrowse.c
Paul Eggert 365e01cc9f Update copyright year to 2020 
Run "TZ=UTC0 admin/update-copyright $(git ls-files)".
2020-01-01 00:59:52 +00:00

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/* ebrowse.c --- parsing files for the ebrowse C++ browser
Copyright (C) 1992-2020 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 3 of the License, or (at
your option) any later version.
GNU Emacs 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 GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <getopt.h>
#include <flexmember.h>
#include <min-max.h>
#include <unlocked-io.h>
/* The SunOS compiler doesn't have SEEK_END. */
#ifndef SEEK_END
#define SEEK_END 2
#endif
/* Files are read in chunks of this number of bytes. */
enum { READ_CHUNK_SIZE = 100 * 1024 };
/* Value is true if strings X and Y compare equal. */
static bool
streq (char const *x, char const *y)
{
return strcmp (x, y) == 0;
}
static bool
filename_eq (char const *x, char const *y)
{
#ifdef __MSDOS__
return strcasecmp (x, y) == 0;
#elif defined WINDOWSNT
return stricmp (x, y) == 0;
#else
return streq (x, y);
#endif
}
/* The default output file name. */
#define DEFAULT_OUTFILE "BROWSE"
/* A version string written to the output file. Change this whenever
the structure of the output file changes. */
#define EBROWSE_FILE_VERSION "ebrowse 5.0"
/* The output file consists of a tree of Lisp objects, with major
nodes built out of Lisp structures. These are the heads of the
Lisp structs with symbols identifying their type. */
#define TREE_HEADER_STRUCT "[ebrowse-hs "
#define TREE_STRUCT "[ebrowse-ts "
#define MEMBER_STRUCT "[ebrowse-ms "
#define CLASS_STRUCT "[ebrowse-cs "
/* The name of the symbol table entry for global functions, variables,
defines etc. This name also appears in the browser display. */
#define GLOBALS_NAME "*Globals*"
/* Token definitions. */
enum token
{
YYEOF = 0, /* end of file */
CSTRING = 256, /* string constant */
CCHAR, /* character constant */
CINT, /* integral constant */
CFLOAT, /* real constant */
ELLIPSIS, /* ... */
LSHIFTASGN, /* <<= */
RSHIFTASGN, /* >>= */
ARROWSTAR, /* ->* */
IDENT, /* identifier */
DIVASGN, /* /= */
INC, /* ++ */
ADDASGN, /* += */
DEC, /* -- */
ARROW, /* -> */
SUBASGN, /* -= */
MULASGN, /* *= */
MODASGN, /* %= */
LOR, /* || */
ORASGN, /* |= */
LAND, /* && */
ANDASGN, /* &= */
XORASGN, /* ^= */
POINTSTAR, /* .* */
DCOLON, /* :: */
EQ, /* == */
NE, /* != */
LE, /* <= */
LSHIFT, /* << */
GE, /* >= */
RSHIFT, /* >> */
/* Keywords. The undef's are there because these
three symbols are very likely to be defined somewhere. */
#undef BOOL
#undef TRUE
#undef FALSE
ASM, /* asm */
AUTO, /* auto */
BREAK, /* break */
CASE, /* case */
CATCH, /* catch */
CHAR, /* char */
CLASS, /* class */
CONST, /* const */
CONTINUE, /* continue */
DEFAULT, /* default */
DELETE, /* delete */
DO, /* do */
DOUBLE, /* double */
ELSE, /* else */
ENUM, /* enum */
EXTERN, /* extern */
FLOAT, /* float */
FOR, /* for */
FRIEND, /* friend */
GOTO, /* goto */
IF, /* if */
T_INLINE, /* inline */
INT, /* int */
LONG, /* long */
NEW, /* new */
OPERATOR, /* operator */
PRIVATE, /* private */
PROTECTED, /* protected */
PUBLIC, /* public */
REGISTER, /* register */
RETURN, /* return */
SHORT, /* short */
SIGNED, /* signed */
SIZEOF, /* sizeof */
STATIC, /* static */
STRUCT, /* struct */
SWITCH, /* switch */
TEMPLATE, /* template */
THIS, /* this */
THROW, /* throw */
TRY, /* try */
TYPEDEF, /* typedef */
UNION, /* union */
UNSIGNED, /* unsigned */
VIRTUAL, /* virtual */
VOID, /* void */
VOLATILE, /* volatile */
WHILE, /* while */
MUTABLE, /* mutable */
BOOL, /* bool */
TRUE, /* true */
FALSE, /* false */
SIGNATURE, /* signature (GNU extension) */
NAMESPACE, /* namespace */
EXPLICIT, /* explicit */
TYPENAME, /* typename */
CONST_CAST, /* const_cast */
DYNAMIC_CAST, /* dynamic_cast */
REINTERPRET_CAST, /* reinterpret_cast */
STATIC_CAST, /* static_cast */
TYPEID, /* typeid */
USING, /* using */
WCHAR, /* wchar_t */
FINAL /* final */
};
/* Storage classes, in a wider sense. */
enum sc
{
SC_UNKNOWN,
SC_MEMBER, /* Is an instance member. */
SC_STATIC, /* Is static member. */
SC_FRIEND, /* Is friend function. */
SC_TYPE /* Is a type definition. */
};
/* Member visibility. */
enum visibility
{
V_PUBLIC,
V_PROTECTED,
V_PRIVATE
};
/* Member flags. */
#define F_VIRTUAL 1 /* Is virtual function. */
#define F_INLINE 2 /* Is inline function. */
#define F_CONST 4 /* Is const. */
#define F_PURE 8 /* Is pure virtual function. */
#define F_MUTABLE 16 /* Is mutable. */
#define F_TEMPLATE 32 /* Is a template. */
#define F_EXPLICIT 64 /* Is explicit constructor. */
#define F_THROW 128 /* Has a throw specification. */
#define F_EXTERNC 256 /* Is declared extern "C". */
#define F_DEFINE 512 /* Is a #define. */
/* Set and test a bit in an int. */
static void
set_flag (int *f, int flag)
{
*f |= flag;
}
static bool
has_flag (int f, int flag)
{
return (f & flag) != 0;
}
/* Structure describing a class member. */
struct member
{
struct member *next; /* Next in list of members. */
struct member *anext; /* Collision chain in member_table. */
struct member **list; /* Pointer to list in class. */
unsigned param_hash; /* Hash value for parameter types. */
int vis; /* Visibility (public, ...). */
int flags; /* See F_* above. */
char *regexp; /* Matching regular expression. */
const char *filename; /* Don't free this shared string. */
int pos; /* Buffer position of occurrence. */
char *def_regexp; /* Regular expression matching definition. */
const char *def_filename; /* File name of definition. */
int def_pos; /* Buffer position of definition. */
char name[FLEXIBLE_ARRAY_MEMBER]; /* Member name. */
};
/* Structures of this type are used to connect class structures with
their super and subclasses. */
struct link
{
struct sym *sym; /* The super or subclass. */
struct link *next; /* Next in list or NULL. */
};
/* Structure used to record namespace aliases. */
struct alias
{
struct alias *next; /* Next in list. */
struct sym *namesp; /* Namespace in which defined. */
struct link *aliasee; /* List of aliased namespaces (A::B::C...). */
char name[FLEXIBLE_ARRAY_MEMBER]; /* Alias name. */
};
/* The structure used to describe a class in the symbol table,
or a namespace in all_namespaces. */
struct sym
{
int flags; /* Is class a template class?. */
unsigned char visited; /* Used to find circles. */
struct sym *next; /* Hash collision list. */
struct link *subs; /* List of subclasses. */
struct link *supers; /* List of superclasses. */
struct member *vars; /* List of instance variables. */
struct member *fns; /* List of instance functions. */
struct member *static_vars; /* List of static variables. */
struct member *static_fns; /* List of static functions. */
struct member *friends; /* List of friend functions. */
struct member *types; /* List of local types. */
char *regexp; /* Matching regular expression. */
int pos; /* Buffer position. */
const char *filename; /* File in which it can be found. */
const char *sfilename; /* File in which members can be found. */
struct sym *namesp; /* Namespace in which defined. . */
char name[FLEXIBLE_ARRAY_MEMBER]; /* Name of the class. */
};
/* Experimental: Print info for `--position-info'. We print
'(CLASS-NAME SCOPE MEMBER-NAME). */
#define P_DEFN 1
#define P_DECL 2
static int info_where;
static struct sym *info_cls = NULL;
static struct member *info_member = NULL;
/* Experimental. For option `--position-info', the buffer position we
are interested in. When this position is reached, print out
information about what we know about that point. */
static int info_position = -1;
/* Command line options structure for getopt_long. */
static struct option const options[] =
{
{"append", no_argument, NULL, 'a'},
{"files", required_argument, NULL, 'f'},
{"help", no_argument, NULL, -2},
{"min-regexp-length", required_argument, NULL, 'm'},
{"max-regexp-length", required_argument, NULL, 'M'},
{"no-nested-classes", no_argument, NULL, 'n'},
{"no-regexps", no_argument, NULL, 'x'},
{"no-structs-or-unions", no_argument, NULL, 's'},
{"output-file", required_argument, NULL, 'o'},
{"position-info", required_argument, NULL, 'p'},
{"search-path", required_argument, NULL, 'I'},
{"verbose", no_argument, NULL, 'v'},
{"version", no_argument, NULL, -3},
{"very-verbose", no_argument, NULL, 'V'},
{NULL, 0, NULL, 0}
};
/* Semantic values of tokens. Set by yylex.. */
static unsigned yyival; /* Set for token CINT. */
static char *yytext; /* Set for token IDENT. */
static char *yytext_end;
/* Output file. */
static FILE *yyout;
/* Current line number. */
static int yyline;
/* The name of the current input file. */
static const char *filename;
/* Three character class vectors, and macros to test membership
of characters. */
static char is_ident[255];
static char is_digit[255];
static char is_white[255];
#define IDENTP(C) is_ident[(unsigned char) (C)]
#define DIGITP(C) is_digit[(unsigned char) (C)]
#define WHITEP(C) is_white[(unsigned char) (C)]
/* Command line flags. */
static int f_append;
static int f_verbose;
static int f_very_verbose;
static int f_structs = 1;
static int f_regexps = 1;
static int f_nested_classes = 1;
/* Maximum and minimum lengths of regular expressions matching a
member, class etc., for writing them to the output file. These are
overridable from the command line. */
static int min_regexp = 5;
static int max_regexp = 50;
/* Input buffer. */
static char *inbuffer;
static char *in;
static size_t inbuffer_size;
/* Return the current buffer position in the input file. */
#define BUFFER_POS() (in - inbuffer)
/* If current lookahead is CSTRING, the following points to the
first character in the string constant. Used for recognizing
extern "C". */
static char *string_start;
/* The size of the hash tables for classes.and members. Should be
prime. */
#define TABLE_SIZE 1001
/* The hash table for class symbols. */
static struct sym *class_table[TABLE_SIZE];
/* Hash table containing all member structures. This is generally
faster for member lookup than traversing the member lists of a
`struct sym'. */
static struct member *member_table[TABLE_SIZE];
/* Hash table for namespace aliases */
static struct alias *namespace_alias_table[TABLE_SIZE];
/* The special class symbol used to hold global functions,
variables etc. */
static struct sym *global_symbols;
/* The current namespace. */
static struct sym *current_namespace;
/* The list of all known namespaces. */
static struct sym *all_namespaces;
/* Stack of namespaces we're currently nested in, during the parse. */
static struct sym **namespace_stack;
static int namespace_stack_size;
static int namespace_sp;
/* The current lookahead token. */
static int tk = -1;
/* Structure describing a keyword. */
struct kw
{
const char *name; /* Spelling. */
int tk; /* Token value. */
struct kw *next; /* Next in collision chain. */
};
/* Keywords are lookup up in a hash table of their own. */
#define KEYWORD_TABLE_SIZE 1001
static struct kw *keyword_table[KEYWORD_TABLE_SIZE];
/* Search path. */
struct search_path
{
char *path;
struct search_path *next;
};
static struct search_path *search_path;
static struct search_path *search_path_tail;
/* Function prototypes. */
static char *matching_regexp (void);
static struct sym *add_sym (const char *, struct sym *);
static void add_global_defn (char *, char *, int, unsigned, int, int, int);
static void add_global_decl (char *, char *, int, unsigned, int, int, int);
static struct member *add_member (struct sym *, char *, int, int, unsigned);
static void class_definition (struct sym *, const char *, int, int, int);
static char *operator_name (int *);
static void parse_qualified_param_ident_or_type (char **);
/***********************************************************************
Utilities
***********************************************************************/
/* Print an error in a printf-like style with the current input file
name and line number. */
static void
yyerror (const char *format, const char *s)
{
fprintf (stderr, "%s:%d: ", filename, yyline);
fprintf (stderr, format, s);
putc ('\n', stderr);
}
/* Like malloc but print an error and exit if not enough memory is
available. */
static void * ATTRIBUTE_MALLOC
xmalloc (size_t nbytes)
{
void *p = malloc (nbytes);
if (p == NULL)
{
yyerror ("out of memory", NULL);
exit (EXIT_FAILURE);
}
return p;
}
/* Like realloc but print an error and exit if out of memory. */
static void *
xrealloc (void *p, size_t sz)
{
p = realloc (p, sz);
if (p == NULL)
{
yyerror ("out of memory", NULL);
exit (EXIT_FAILURE);
}
return p;
}
/* Like strdup, but print an error and exit if not enough memory is
available.. If S is null, return null. */
static char *
xstrdup (char *s)
{
if (s)
return strcpy (xmalloc (strlen (s) + 1), s);
return s;
}
/***********************************************************************
Symbols
***********************************************************************/
/* Initialize the symbol table. This currently only sets up the
special symbol for globals (`*Globals*'). */
static void
init_sym (void)
{
global_symbols = add_sym (GLOBALS_NAME, NULL);
}
/* Add a symbol for class NAME to the symbol table. NESTED_IN_CLASS
is the class in which class NAME was found. If it is null,
this means the scope of NAME is the current namespace.
If a symbol for NAME already exists, return that. Otherwise
create a new symbol and set it to default values. */
static struct sym *
add_sym (const char *name, struct sym *nested_in_class)
{
struct sym *sym;
unsigned h;
const char *s;
struct sym *scope = nested_in_class ? nested_in_class : current_namespace;
for (s = name, h = 0; *s; ++s)
h = (h << 1) ^ *s;
h %= TABLE_SIZE;
for (sym = class_table[h]; sym; sym = sym->next)
if (streq (name, sym->name)
&& ((!sym->namesp && !scope)
|| (sym->namesp && scope
&& streq (sym->namesp->name, scope->name))))
break;
if (sym == NULL)
{
if (f_very_verbose)
{
putchar ('\t');
puts (name);
}
sym = xmalloc (FLEXSIZEOF (struct sym, name, strlen (name) + 1));
memset (sym, 0, offsetof (struct sym, name));
strcpy (sym->name, name);
sym->namesp = scope;
sym->next = class_table[h];
class_table[h] = sym;
}
return sym;
}
/* Add links between superclass SUPER and subclass SUB. */
static void
add_link (struct sym *super, struct sym *sub)
{
struct link *lnk, *lnk2, *p, *prev;
/* See if a link already exists. */
for (p = super->subs, prev = NULL;
p && strcmp (sub->name, p->sym->name) > 0;
prev = p, p = p->next)
;
/* Avoid duplicates. */
if (p == NULL || p->sym != sub)
{
lnk = (struct link *) xmalloc (sizeof *lnk);
lnk2 = (struct link *) xmalloc (sizeof *lnk2);
lnk->sym = sub;
lnk->next = p;
if (prev)
prev->next = lnk;
else
super->subs = lnk;
lnk2->sym = super;
lnk2->next = sub->supers;
sub->supers = lnk2;
}
}
/* Find in class CLS member NAME.
VAR non-zero means look for a member variable; otherwise a function
is searched. SC specifies what kind of member is searched---a
static, or per-instance member etc. HASH is a hash code for the
parameter types of functions. Value is a pointer to the member
found or null if not found. */
static struct member *
find_member (struct sym *cls, char *name, int var, int sc, unsigned int hash)
{
struct member **list;
struct member *p;
unsigned name_hash = 0;
char *s;
int i;
switch (sc)
{
case SC_FRIEND:
list = &cls->friends;
break;
case SC_TYPE:
list = &cls->types;
break;
case SC_STATIC:
list = var ? &cls->static_vars : &cls->static_fns;
break;
default:
list = var ? &cls->vars : &cls->fns;
break;
}
for (s = name; *s; ++s)
name_hash = (name_hash << 1) ^ *s;
i = name_hash % TABLE_SIZE;
for (p = member_table[i]; p; p = p->anext)
if (p->list == list && p->param_hash == hash && streq (name, p->name))
break;
return p;
}
/* Add to class CLS information for the declaration of member NAME.
REGEXP is a regexp matching the declaration, if non-null. POS is
the position in the source where the declaration is found. HASH is
a hash code for the parameter list of the member, if it's a
function. VAR non-zero means member is a variable or type. SC
specifies the type of member (instance member, static, ...). VIS
is the member's visibility (public, protected, private). FLAGS is
a bit set giving additional information about the member (see the
F_* defines). */
static void
add_member_decl (struct sym *cls, char *name, char *regexp, int pos, unsigned int hash, int var, int sc, int vis, int flags)
{
struct member *m;
m = find_member (cls, name, var, sc, hash);
if (m == NULL)
m = add_member (cls, name, var, sc, hash);
/* Have we seen a new filename? If so record that. */
if (!cls->filename || !filename_eq (cls->filename, filename))
m->filename = filename;
m->regexp = regexp;
m->pos = pos;
m->flags = flags;
switch (vis)
{
case PRIVATE:
m->vis = V_PRIVATE;
break;
case PROTECTED:
m->vis = V_PROTECTED;
break;
case PUBLIC:
m->vis = V_PUBLIC;
break;
}
info_where = P_DECL;
info_cls = cls;
info_member = m;
}
/* Add to class CLS information for the definition of member NAME.
REGEXP is a regexp matching the declaration, if non-null. POS is
the position in the source where the declaration is found. HASH is
a hash code for the parameter list of the member, if it's a
function. VAR non-zero means member is a variable or type. SC
specifies the type of member (instance member, static, ...). VIS
is the member's visibility (public, protected, private). FLAGS is
a bit set giving additional information about the member (see the
F_* defines). */
static void
add_member_defn (struct sym *cls, char *name, char *regexp, int pos, unsigned int hash, int var, int sc, int flags)
{
struct member *m;
if (sc == SC_UNKNOWN)
{
m = find_member (cls, name, var, SC_MEMBER, hash);
if (m == NULL)
{
m = find_member (cls, name, var, SC_STATIC, hash);
if (m == NULL)
m = add_member (cls, name, var, sc, hash);
}
}
else
{
m = find_member (cls, name, var, sc, hash);
if (m == NULL)
m = add_member (cls, name, var, sc, hash);
}
if (!cls->sfilename)
cls->sfilename = filename;
if (!filename_eq (cls->sfilename, filename))
m->def_filename = filename;
m->def_regexp = regexp;
m->def_pos = pos;
m->flags |= flags;
info_where = P_DEFN;
info_cls = cls;
info_member = m;
}
/* Add a symbol for a define named NAME to the symbol table.
REGEXP is a regular expression matching the define in the source,
if it is non-null. POS is the position in the file. */
static void
add_define (char *name, char *regexp, int pos)
{
add_global_defn (name, regexp, pos, 0, 1, SC_FRIEND, F_DEFINE);
add_global_decl (name, regexp, pos, 0, 1, SC_FRIEND, F_DEFINE);
}
/* Add information for the global definition of NAME.
REGEXP is a regexp matching the declaration, if non-null. POS is
the position in the source where the declaration is found. HASH is
a hash code for the parameter list of the member, if it's a
function. VAR non-zero means member is a variable or type. SC
specifies the type of member (instance member, static, ...). VIS
is the member's visibility (public, protected, private). FLAGS is
a bit set giving additional information about the member (see the
F_* defines). */
static void
add_global_defn (char *name, char *regexp, int pos, unsigned int hash, int var, int sc, int flags)
{
int i;
struct sym *sym;
/* Try to find out for which classes a function is a friend, and add
what we know about it to them. */
if (!var)
for (i = 0; i < TABLE_SIZE; ++i)
for (sym = class_table[i]; sym; sym = sym->next)
if (sym != global_symbols && sym->friends)
if (find_member (sym, name, 0, SC_FRIEND, hash))
add_member_defn (sym, name, regexp, pos, hash, 0,
SC_FRIEND, flags);
/* Add to global symbols. */
add_member_defn (global_symbols, name, regexp, pos, hash, var, sc, flags);
}
/* Add information for the global declaration of NAME.
REGEXP is a regexp matching the declaration, if non-null. POS is
the position in the source where the declaration is found. HASH is
a hash code for the parameter list of the member, if it's a
function. VAR non-zero means member is a variable or type. SC
specifies the type of member (instance member, static, ...). VIS
is the member's visibility (public, protected, private). FLAGS is
a bit set giving additional information about the member (see the
F_* defines). */
static void
add_global_decl (char *name, char *regexp, int pos, unsigned int hash, int var, int sc, int flags)
{
/* Add declaration only if not already declared. Header files must
be processed before source files for this to have the right effect.
I do not want to handle implicit declarations at the moment. */
struct member *m;
struct member *found;
m = found = find_member (global_symbols, name, var, sc, hash);
if (m == NULL)
m = add_member (global_symbols, name, var, sc, hash);
/* Definition already seen => probably last declaration implicit.
Override. This means that declarations must always be added to
the symbol table before definitions. */
if (!found)
{
if (!global_symbols->filename
|| !filename_eq (global_symbols->filename, filename))
m->filename = filename;
m->regexp = regexp;
m->pos = pos;
m->vis = V_PUBLIC;
m->flags = flags;
info_where = P_DECL;
info_cls = global_symbols;
info_member = m;
}
}
/* Add a symbol for member NAME to class CLS.
VAR non-zero means it's a variable. SC specifies the kind of
member. HASH is a hash code for the parameter types of a function.
Value is a pointer to the member's structure. */
static struct member *
add_member (struct sym *cls, char *name, int var, int sc, unsigned int hash)
{
struct member *m = xmalloc (FLEXSIZEOF (struct member, name,
strlen (name) + 1));
struct member **list;
struct member *p;
struct member *prev;
unsigned name_hash = 0;
int i;
char *s;
strcpy (m->name, name);
m->param_hash = hash;
m->vis = 0;
m->flags = 0;
m->regexp = NULL;
m->filename = NULL;
m->pos = 0;
m->def_regexp = NULL;
m->def_filename = NULL;
m->def_pos = 0;
assert (cls != NULL);
switch (sc)
{
case SC_FRIEND:
list = &cls->friends;
break;
case SC_TYPE:
list = &cls->types;
break;
case SC_STATIC:
list = var ? &cls->static_vars : &cls->static_fns;
break;
default:
list = var ? &cls->vars : &cls->fns;
break;
}
for (s = name; *s; ++s)
name_hash = (name_hash << 1) ^ *s;
i = name_hash % TABLE_SIZE;
m->anext = member_table[i];
member_table[i] = m;
m->list = list;
/* Keep the member list sorted. It's cheaper to do it here than to
sort them in Lisp. */
for (prev = NULL, p = *list;
p && strcmp (name, p->name) > 0;
prev = p, p = p->next)
;
m->next = p;
if (prev)
prev->next = m;
else
*list = m;
return m;
}
/* Given the root R of a class tree, step through all subclasses
recursively, marking functions as virtual that are declared virtual
in base classes. */
static void
mark_virtual (struct sym *r)
{
struct link *p;
struct member *m, *m2;
for (p = r->subs; p; p = p->next)
{
for (m = r->fns; m; m = m->next)
if (has_flag (m->flags, F_VIRTUAL))
{
for (m2 = p->sym->fns; m2; m2 = m2->next)
if (m->param_hash == m2->param_hash && streq (m->name, m2->name))
set_flag (&m2->flags, F_VIRTUAL);
}
mark_virtual (p->sym);
}
}
/* For all roots of the class tree, mark functions as virtual that
are virtual because of a virtual declaration in a base class. */
static void
mark_inherited_virtual (void)
{
struct sym *r;
int i;
for (i = 0; i < TABLE_SIZE; ++i)
for (r = class_table[i]; r; r = r->next)
if (r->supers == NULL)
mark_virtual (r);
}
/* Create and return a symbol for a namespace with name NAME. */
static struct sym *
make_namespace (char *name, struct sym *context)
{
struct sym *s = xmalloc (FLEXSIZEOF (struct sym, name, strlen (name) + 1));
memset (s, 0, offsetof (struct sym, name));
strcpy (s->name, name);
s->next = all_namespaces;
s->namesp = context;
all_namespaces = s;
return s;
}
/* Find the symbol for namespace NAME. If not found, return NULL */
static struct sym *
check_namespace (char *name, struct sym *context)
{
struct sym *p = NULL;
for (p = all_namespaces; p; p = p->next)
{
if (streq (p->name, name) && (p->namesp == context))
break;
}
return p;
}
/* Find the symbol for namespace NAME. If not found, add a new symbol
for NAME to all_namespaces. */
static struct sym *
find_namespace (char *name, struct sym *context)
{
struct sym *p = check_namespace (name, context);
if (p == NULL)
p = make_namespace (name, context);
return p;
}
/* Find namespace alias with name NAME. If not found return NULL. */
static struct link *
check_namespace_alias (char *name)
{
struct link *p = NULL;
struct alias *al;
unsigned h;
char *s;
for (s = name, h = 0; *s; ++s)
h = (h << 1) ^ *s;
h %= TABLE_SIZE;
for (al = namespace_alias_table[h]; al; al = al->next)
if (streq (name, al->name) && (al->namesp == current_namespace))
{
p = al->aliasee;
break;
}
return p;
}
/* Register the name NEW_NAME as an alias for namespace list OLD_NAME. */
static void
register_namespace_alias (char *new_name, struct link *old_name)
{
unsigned h;
char *s;
struct alias *al;
for (s = new_name, h = 0; *s; ++s)
h = (h << 1) ^ *s;
h %= TABLE_SIZE;
/* Is it already in the table of aliases? */
for (al = namespace_alias_table[h]; al; al = al->next)
if (streq (new_name, al->name) && (al->namesp == current_namespace))
return;
al = xmalloc (FLEXSIZEOF (struct alias, name, strlen (new_name) + 1));
strcpy (al->name, new_name);
al->next = namespace_alias_table[h];
al->namesp = current_namespace;
al->aliasee = old_name;
namespace_alias_table[h] = al;
}
/* Enter namespace with name NAME. */
static void
enter_namespace (char *name)
{
struct sym *p = find_namespace (name, current_namespace);
if (namespace_sp == namespace_stack_size)
{
int size = max (10, 2 * namespace_stack_size);
namespace_stack
= (struct sym **) xrealloc ((void *)namespace_stack,
size * sizeof *namespace_stack);
namespace_stack_size = size;
}
namespace_stack[namespace_sp++] = current_namespace;
current_namespace = p;
}
/* Leave the current namespace. */
static void
leave_namespace (void)
{
assert (namespace_sp > 0);
current_namespace = namespace_stack[--namespace_sp];
}
/***********************************************************************
Writing the Output File
***********************************************************************/
/* Write string S to the output file FP in a Lisp-readable form.
If S is null, write out `()'. */
static void
putstr (const char *s, FILE *fp)
{
if (!s)
{
putc ('(', fp);
putc (')', fp);
putc (' ', fp);
}
else
{
putc ('"', fp);
fputs (s, fp);
putc ('"', fp);
putc (' ', fp);
}
}
/* A dynamically allocated buffer for constructing a scope name. */
static char *scope_buffer;
static int scope_buffer_size;
static int scope_buffer_len;
/* Make sure scope_buffer has enough room to add LEN chars to it. */
static void
ensure_scope_buffer_room (int len)
{
if (scope_buffer_len + len >= scope_buffer_size)
{
int new_size = max (2 * scope_buffer_size, scope_buffer_len + len);
scope_buffer = (char *) xrealloc (scope_buffer, new_size);
scope_buffer_size = new_size;
}
}
/* Recursively add the scope names of symbol P and the scopes of its
namespaces to scope_buffer. Value is a pointer to the complete
scope name constructed. */
static char *
sym_scope_1 (struct sym *p)
{
int len;
if (p->namesp)
sym_scope_1 (p->namesp);
if (*scope_buffer)
{
ensure_scope_buffer_room (3);
strcpy (scope_buffer + scope_buffer_len, "::");
scope_buffer_len += 2;
}
len = strlen (p->name);
ensure_scope_buffer_room (len + 1);
strcpy (scope_buffer + scope_buffer_len, p->name);
scope_buffer_len += len;
if (has_flag (p->flags, F_TEMPLATE))
{
ensure_scope_buffer_room (3);
strcpy (scope_buffer + scope_buffer_len, "<>");
scope_buffer_len += 2;
}
return scope_buffer;
}
/* Return the scope of symbol P in printed representation, i.e.
as it would appear in a C*+ source file. */
static char *
sym_scope (struct sym *p)
{
if (!scope_buffer)
{
scope_buffer_size = 1024;
scope_buffer = (char *) xmalloc (scope_buffer_size);
}
*scope_buffer = '\0';
scope_buffer_len = 0;
if (p->namesp)
sym_scope_1 (p->namesp);
return scope_buffer;
}
/* Dump the list of members M to file FP. Value is the length of the
list. */
static int
dump_members (FILE *fp, struct member *m)
{
int n;
putc ('(', fp);
for (n = 0; m; m = m->next, ++n)
{
fputs (MEMBER_STRUCT, fp);
putstr (m->name, fp);
putstr (NULL, fp); /* FIXME? scope for globals */
fprintf (fp, "%u ", (unsigned) m->flags);
putstr (m->filename, fp);
putstr (m->regexp, fp);
fprintf (fp, "%u ", (unsigned) m->pos);
fprintf (fp, "%u ", (unsigned) m->vis);
putc (' ', fp);
putstr (m->def_filename, fp);
putstr (m->def_regexp, fp);
fprintf (fp, "%u", (unsigned) m->def_pos);
putc (']', fp);
putc ('\n', fp);
}
putc (')', fp);
putc ('\n', fp);
return n;
}
/* Dump class ROOT to stream FP. */
static void
dump_sym (FILE *fp, struct sym *root)
{
fputs (CLASS_STRUCT, fp);
putstr (root->name, fp);
/* Print scope, if any. */
if (root->namesp)
putstr (sym_scope (root), fp);
else
putstr (NULL, fp);
/* Print flags. */
fprintf (fp, "%d", root->flags);
putstr (root->filename, fp);
putstr (root->regexp, fp);
fprintf (fp, "%u", (unsigned) root->pos);
putstr (root->sfilename, fp);
putc (']', fp);
putc ('\n', fp);
}
/* Dump class ROOT and its subclasses to file FP. Value is the
number of classes written. */
static int
dump_tree (FILE *fp, struct sym *root)
{
struct link *lk;
unsigned n = 0;
dump_sym (fp, root);
if (f_verbose)
{
putchar ('+');
fflush (stdout);
}
putc ('(', fp);
for (lk = root->subs; lk; lk = lk->next)
{
fputs (TREE_STRUCT, fp);
n += dump_tree (fp, lk->sym);
putc (']', fp);
}
putc (')', fp);
dump_members (fp, root->vars);
n += dump_members (fp, root->fns);
dump_members (fp, root->static_vars);
n += dump_members (fp, root->static_fns);
n += dump_members (fp, root->friends);
dump_members (fp, root->types);
/* Superclasses. */
putc ('(', fp);
putc (')', fp);
/* Mark slot. */
putc ('(', fp);
putc (')', fp);
putc ('\n', fp);
return n;
}
/* Dump the entire class tree to file FP. */
static void
dump_roots (FILE *fp)
{
int i, n = 0;
struct sym *r;
/* Output file header containing version string, command line
options etc. */
if (!f_append)
{
fputs (TREE_HEADER_STRUCT, fp);
putstr (EBROWSE_FILE_VERSION, fp);
putc ('\"', fp);
if (!f_structs)
fputs (" -s", fp);
if (f_regexps)
fputs (" -x", fp);
putc ('\"', fp);
fputs (" ()", fp);
fputs (" ()", fp);
putc (']', fp);
}
/* Mark functions as virtual that are so because of functions
declared virtual in base classes. */
mark_inherited_virtual ();
/* Dump the roots of the graph. */
for (i = 0; i < TABLE_SIZE; ++i)
for (r = class_table[i]; r; r = r->next)
if (!r->supers)
{
fputs (TREE_STRUCT, fp);
n += dump_tree (fp, r);
putc (']', fp);
}
if (f_verbose)
putchar ('\n');
}
/***********************************************************************
Scanner
***********************************************************************/
#ifdef DEBUG
#define INCREMENT_LINENO \
do { \
if (f_very_verbose) \
{ \
++yyline; \
printf ("%d:\n", yyline); \
} \
else \
++yyline; \
} while (0)
#else
#define INCREMENT_LINENO ++yyline
#endif
/* Define two macros for accessing the input buffer (current input
file). GET(C) sets C to the next input character and advances the
input pointer. UNGET retracts the input pointer. */
#define GET(C) ((C) = *in++)
#define UNGET() (--in)
/* Process a preprocessor line. Value is the next character from the
input buffer not consumed. */
static int
process_pp_line (void)
{
int in_comment = 0, in_string = 0;
int c;
char *p = yytext;
/* Skip over white space. The `#' has been consumed already. */
while (WHITEP (GET (c)))
;
/* Read the preprocessor command (if any). */
while (IDENTP (c))
{
*p++ = c;
GET (c);
}
/* Is it a `define'? */
*p = '\0';
if (*yytext && streq (yytext, "define"))
{
p = yytext;
while (WHITEP (c))
GET (c);
while (IDENTP (c))
{
*p++ = c;
GET (c);
}
*p = '\0';
if (*yytext)
{
char *regexp = matching_regexp ();
int pos = BUFFER_POS ();
add_define (yytext, regexp, pos);
}
}
while (c && (c != '\n' || in_comment || in_string))
{
if (c == '\\')
GET (c);
else if (c == '/' && !in_comment)
{
if (GET (c) == '*')
in_comment = 1;
}
else if (c == '*' && in_comment)
{
if (GET (c) == '/')
in_comment = 0;
}
else if (c == '"')
in_string = !in_string;
if (c == '\n')
INCREMENT_LINENO;
GET (c);
}
return c;
}
/* Value is the next token from the input buffer. */
static int
yylex (void)
{
int c;
char end_char;
char *p;
for (;;)
{
while (WHITEP (GET (c)))
;
switch (c)
{
case '\n':
INCREMENT_LINENO;
break;
case '\r':
break;
case 0:
/* End of file. */
return YYEOF;
case '\\':
GET (c);
break;
case '"':
case '\'':
/* String and character constants. */
end_char = c;
string_start = in;
while (GET (c) && c != end_char)
{
switch (c)
{
case '\\':
/* Escape sequences. */
if (!GET (c))
{
if (end_char == '\'')
yyerror ("EOF in character constant", NULL);
else
yyerror ("EOF in string constant", NULL);
goto end_string;
}
else switch (c)
{
case '\n':
INCREMENT_LINENO;
case 'a':
case 'b':
case 'f':
case 'n':
case 'r':
case 't':
case 'v':
break;
case 'x':
{
/* Hexadecimal escape sequence. */
int i;
for (i = 0; i < 2; ++i)
{
GET (c);
if (c >= '0' && c <= '7')
;
else if (c >= 'a' && c <= 'f')
;
else if (c >= 'A' && c <= 'F')
;
else
{
UNGET ();
break;
}
}
}
break;
case '0':
{
/* Octal escape sequence. */
int i;
for (i = 0; i < 3; ++i)
{
GET (c);
if (c >= '0' && c <= '7')
;
else
{
UNGET ();
break;
}
}
}
break;
default:
break;
}
break;
case '\n':
if (end_char == '\'')
yyerror ("newline in character constant", NULL);
else
yyerror ("newline in string constant", NULL);
INCREMENT_LINENO;
break;
default:
break;
}
}
end_string:
return end_char == '\'' ? CCHAR : CSTRING;
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': case 'g':
case 'h': case 'i': case 'j': case 'k': case 'l': case 'm': case 'n':
case 'o': case 'p': case 'q': case 'r': case 's': case 't': case 'u':
case 'v': case 'w': case 'x': case 'y': case 'z':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
case 'H': case 'I': case 'J': case 'K': case 'L': case 'M': case 'N':
case 'O': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'U':
case 'V': case 'W': case 'X': case 'Y': case 'Z': case '_':
{
/* Identifier and keywords. */
unsigned hash;
struct kw *k;
p = yytext;
*p++ = hash = c;
while (IDENTP (GET (*p)))
{
hash = (hash << 1) ^ *p++;
if (p == yytext_end - 1)
{
int size = yytext_end - yytext;
yytext = (char *) xrealloc (yytext, 2 * size);
yytext_end = yytext + 2 * size;
p = yytext + size - 1;
}
}
UNGET ();
*p = 0;
for (k = keyword_table[hash % KEYWORD_TABLE_SIZE]; k; k = k->next)
if (streq (k->name, yytext))
return k->tk;
return IDENT;
}
case '/':
/* C and C++ comments, '/' and '/='. */
switch (GET (c))
{
case '*':
while (GET (c))
{
switch (c)
{
case '*':
if (GET (c) == '/')
goto comment_end;
UNGET ();
break;
case '\\':
GET (c);
break;
case '\n':
INCREMENT_LINENO;
break;
}
}
comment_end:;
break;
case '=':
return DIVASGN;
case '/':
while (GET (c) && c != '\n')
;
/* Don't try to read past the end of the input buffer if
the file ends in a C++ comment without a newline. */
if (c == 0)
return YYEOF;
INCREMENT_LINENO;
break;
default:
UNGET ();
return '/';
}
break;
case '+':
if (GET (c) == '+')
return INC;
else if (c == '=')
return ADDASGN;
UNGET ();
return '+';
case '-':
switch (GET (c))
{
case '-':
return DEC;
case '>':
if (GET (c) == '*')
return ARROWSTAR;
UNGET ();
return ARROW;
case '=':
return SUBASGN;
}
UNGET ();
return '-';
case '*':
if (GET (c) == '=')
return MULASGN;
UNGET ();
return '*';
case '%':
if (GET (c) == '=')
return MODASGN;
UNGET ();
return '%';
case '|':
if (GET (c) == '|')
return LOR;
else if (c == '=')
return ORASGN;
UNGET ();
return '|';
case '&':
if (GET (c) == '&')
return LAND;
else if (c == '=')
return ANDASGN;
UNGET ();
return '&';
case '^':
if (GET (c) == '=')
return XORASGN;
UNGET ();
return '^';
case '.':
if (GET (c) == '*')
return POINTSTAR;
else if (c == '.')
{
if (GET (c) != '.')
yyerror ("invalid token '..' ('...' assumed)", NULL);
UNGET ();
return ELLIPSIS;
}
else if (!DIGITP (c))
{
UNGET ();
return '.';
}
goto mantissa;
case ':':
if (GET (c) == ':')
return DCOLON;
UNGET ();
return ':';
case '=':
if (GET (c) == '=')
return EQ;
UNGET ();
return '=';
case '!':
if (GET (c) == '=')
return NE;
UNGET ();
return '!';
case '<':
switch (GET (c))
{
case '=':
return LE;
case '<':
if (GET (c) == '=')
return LSHIFTASGN;
UNGET ();
return LSHIFT;
}
UNGET ();
return '<';
case '>':
switch (GET (c))
{
case '=':
return GE;
case '>':
if (GET (c) == '=')
return RSHIFTASGN;
UNGET ();
return RSHIFT;
}
UNGET ();
return '>';
case '#':
c = process_pp_line ();
if (c == 0)
return YYEOF;
break;
case '(': case ')': case '[': case ']': case '{': case '}':
case ';': case ',': case '?': case '~':
return c;
case '0':
yyival = 0;
if (GET (c) == 'x' || c == 'X')
{
while (GET (c))
{
if (DIGITP (c))
yyival = yyival * 16 + c - '0';
else if (c >= 'a' && c <= 'f')
yyival = yyival * 16 + c - 'a' + 10;
else if (c >= 'A' && c <= 'F')
yyival = yyival * 16 + c - 'A' + 10;
else
break;
}
goto int_suffixes;
}
else if (c == '.')
goto mantissa;
while (c >= '0' && c <= '7')
{
yyival = (yyival << 3) + c - '0';
GET (c);
}
int_suffixes:
/* Integer suffixes. */
while (isalpha (c))
GET (c);
UNGET ();
return CINT;
case '1': case '2': case '3': case '4': case '5': case '6':
case '7': case '8': case '9':
/* Integer or floating constant, part before '.'. */
yyival = c - '0';
while (GET (c) && DIGITP (c))
yyival = 10 * yyival + c - '0';
if (c != '.')
goto int_suffixes;
mantissa:
/* Digits following '.'. */
while (DIGITP (c))
GET (c);
/* Optional exponent. */
if (c == 'E' || c == 'e')
{
if (GET (c) == '-' || c == '+')
GET (c);
while (DIGITP (c))
GET (c);
}
/* Optional type suffixes. */
while (isalpha (c))
GET (c);
UNGET ();
return CFLOAT;
default:
break;
}
}
}
/* Actually local to matching_regexp. These variables must be in
global scope for the case that `static' get's defined away. */
static char *matching_regexp_buffer, *matching_regexp_end_buf;
/* Value is the string from the start of the line to the current
position in the input buffer, or maybe a bit more if that string is
shorter than min_regexp. */
static char *
matching_regexp (void)
{
char *p;
char *s;
char *t;
if (!f_regexps)
return NULL;
if (matching_regexp_buffer == NULL)
{
matching_regexp_buffer = (char *) xmalloc (max_regexp);
matching_regexp_end_buf = &matching_regexp_buffer[max_regexp] - 1;
}
/* Scan back to previous newline of buffer start. */
for (p = in - 1; p > inbuffer && *p != '\n'; --p)
;
if (*p == '\n')
{
while (in - p < min_regexp && p > inbuffer)
{
/* Line probably not significant enough */
for (--p; p > inbuffer && *p != '\n'; --p)
;
}
if (*p == '\n')
++p;
}
/* Copy from end to make sure significant portions are included.
This implies that in the browser a regular expressing of the form
`^.*{regexp}' has to be used. */
for (s = matching_regexp_end_buf - 1, t = in;
s > matching_regexp_buffer && t > p;)
{
*--s = *--t;
if (*s == '"' || *s == '\\')
*--s = '\\';
}
*(matching_regexp_end_buf - 1) = '\0';
return xstrdup (s);
}
/* Return a printable representation of token T. */
static const char *
token_string (int t)
{
static char b[3];
switch (t)
{
case CSTRING: return "string constant";
case CCHAR: return "char constant";
case CINT: return "int constant";
case CFLOAT: return "floating constant";
case ELLIPSIS: return "...";
case LSHIFTASGN: return "<<=";
case RSHIFTASGN: return ">>=";
case ARROWSTAR: return "->*";
case IDENT: return "identifier";
case DIVASGN: return "/=";
case INC: return "++";
case ADDASGN: return "+=";
case DEC: return "--";
case ARROW: return "->";
case SUBASGN: return "-=";
case MULASGN: return "*=";
case MODASGN: return "%=";
case LOR: return "||";
case ORASGN: return "|=";
case LAND: return "&&";
case ANDASGN: return "&=";
case XORASGN: return "^=";
case POINTSTAR: return ".*";
case DCOLON: return "::";
case EQ: return "==";
case NE: return "!=";
case LE: return "<=";
case LSHIFT: return "<<";
case GE: return ">=";
case RSHIFT: return ">>";
case ASM: return "asm";
case AUTO: return "auto";
case BREAK: return "break";
case CASE: return "case";
case CATCH: return "catch";
case CHAR: return "char";
case CLASS: return "class";
case CONST: return "const";
case CONTINUE: return "continue";
case DEFAULT: return "default";
case DELETE: return "delete";
case DO: return "do";
case DOUBLE: return "double";
case ELSE: return "else";
case ENUM: return "enum";
case EXTERN: return "extern";
case FLOAT: return "float";
case FOR: return "for";
case FRIEND: return "friend";
case GOTO: return "goto";
case IF: return "if";
case T_INLINE: return "inline";
case INT: return "int";
case LONG: return "long";
case NEW: return "new";
case OPERATOR: return "operator";
case PRIVATE: return "private";
case PROTECTED: return "protected";
case PUBLIC: return "public";
case REGISTER: return "register";
case RETURN: return "return";
case SHORT: return "short";
case SIGNED: return "signed";
case SIZEOF: return "sizeof";
case STATIC: return "static";
case STRUCT: return "struct";
case SWITCH: return "switch";
case TEMPLATE: return "template";
case THIS: return "this";
case THROW: return "throw";
case TRY: return "try";
case TYPEDEF: return "typedef";
case UNION: return "union";
case UNSIGNED: return "unsigned";
case VIRTUAL: return "virtual";
case VOID: return "void";
case VOLATILE: return "volatile";
case WHILE: return "while";
case MUTABLE: return "mutable";
case BOOL: return "bool";
case TRUE: return "true";
case FALSE: return "false";
case SIGNATURE: return "signature";
case NAMESPACE: return "namespace";
case EXPLICIT: return "explicit";
case TYPENAME: return "typename";
case CONST_CAST: return "const_cast";
case DYNAMIC_CAST: return "dynamic_cast";
case REINTERPRET_CAST: return "reinterpret_cast";
case STATIC_CAST: return "static_cast";
case TYPEID: return "typeid";
case USING: return "using";
case WCHAR: return "wchar_t";
case YYEOF: return "EOF";
case FINAL: return "final";
default:
if (t < 255)
{
b[0] = t;
b[1] = '\0';
return b;
}
else
return "???";
}
}
/* Reinitialize the scanner for a new input file. */
static void
re_init_scanner (void)
{
in = inbuffer;
yyline = 1;
if (yytext == NULL)
{
int size = 256;
yytext = (char *) xmalloc (size * sizeof *yytext);
yytext_end = yytext + size;
}
}
/* Insert a keyword NAME with token value TKV into the keyword hash
table. */
static void
insert_keyword (const char *name, int tkv)
{
const char *s;
unsigned h = 0;
struct kw *k = (struct kw *) xmalloc (sizeof *k);
for (s = name; *s; ++s)
h = (h << 1) ^ *s;
h %= KEYWORD_TABLE_SIZE;
k->name = name;
k->tk = tkv;
k->next = keyword_table[h];
keyword_table[h] = k;
}
/* Initialize the scanner for the first file. This sets up the
character class vectors and fills the keyword hash table. */
static void
init_scanner (void)
{
int i;
/* Allocate the input buffer */
inbuffer_size = READ_CHUNK_SIZE + 1;
inbuffer = in = (char *) xmalloc (inbuffer_size);
yyline = 1;
/* Set up character class vectors. */
for (i = 0; i < sizeof is_ident; ++i)
{
if (i == '_' || isalnum (i))
is_ident[i] = 1;
if (i >= '0' && i <= '9')
is_digit[i] = 1;
if (i == ' ' || i == '\t' || i == '\f' || i == '\v')
is_white[i] = 1;
}
/* Fill keyword hash table. */
insert_keyword ("and", LAND);
insert_keyword ("and_eq", ANDASGN);
insert_keyword ("asm", ASM);
insert_keyword ("auto", AUTO);
insert_keyword ("bitand", '&');
insert_keyword ("bitor", '|');
insert_keyword ("bool", BOOL);
insert_keyword ("break", BREAK);
insert_keyword ("case", CASE);
insert_keyword ("catch", CATCH);
insert_keyword ("char", CHAR);
insert_keyword ("class", CLASS);
insert_keyword ("compl", '~');
insert_keyword ("const", CONST);
insert_keyword ("const_cast", CONST_CAST);
insert_keyword ("continue", CONTINUE);
insert_keyword ("default", DEFAULT);
insert_keyword ("delete", DELETE);
insert_keyword ("do", DO);
insert_keyword ("double", DOUBLE);
insert_keyword ("dynamic_cast", DYNAMIC_CAST);
insert_keyword ("else", ELSE);
insert_keyword ("enum", ENUM);
insert_keyword ("explicit", EXPLICIT);
insert_keyword ("extern", EXTERN);
insert_keyword ("false", FALSE);
insert_keyword ("final", FINAL);
insert_keyword ("float", FLOAT);
insert_keyword ("for", FOR);
insert_keyword ("friend", FRIEND);
insert_keyword ("goto", GOTO);
insert_keyword ("if", IF);
insert_keyword ("inline", T_INLINE);
insert_keyword ("int", INT);
insert_keyword ("long", LONG);
insert_keyword ("mutable", MUTABLE);
insert_keyword ("namespace", NAMESPACE);
insert_keyword ("new", NEW);
insert_keyword ("not", '!');
insert_keyword ("not_eq", NE);
insert_keyword ("operator", OPERATOR);
insert_keyword ("or", LOR);
insert_keyword ("or_eq", ORASGN);
insert_keyword ("private", PRIVATE);
insert_keyword ("protected", PROTECTED);
insert_keyword ("public", PUBLIC);
insert_keyword ("register", REGISTER);
insert_keyword ("reinterpret_cast", REINTERPRET_CAST);
insert_keyword ("return", RETURN);
insert_keyword ("short", SHORT);
insert_keyword ("signed", SIGNED);
insert_keyword ("sizeof", SIZEOF);
insert_keyword ("static", STATIC);
insert_keyword ("static_cast", STATIC_CAST);
insert_keyword ("struct", STRUCT);
insert_keyword ("switch", SWITCH);
insert_keyword ("template", TEMPLATE);
insert_keyword ("this", THIS);
insert_keyword ("throw", THROW);
insert_keyword ("true", TRUE);
insert_keyword ("try", TRY);
insert_keyword ("typedef", TYPEDEF);
insert_keyword ("typeid", TYPEID);
insert_keyword ("typename", TYPENAME);
insert_keyword ("union", UNION);
insert_keyword ("unsigned", UNSIGNED);
insert_keyword ("using", USING);
insert_keyword ("virtual", VIRTUAL);
insert_keyword ("void", VOID);
insert_keyword ("volatile", VOLATILE);
insert_keyword ("wchar_t", WCHAR);
insert_keyword ("while", WHILE);
insert_keyword ("xor", '^');
insert_keyword ("xor_eq", XORASGN);
}
/***********************************************************************
Parser
***********************************************************************/
/* Match the current lookahead token and set it to the next token. */
#define MATCH() (tk = yylex ())
/* Return the lookahead token. If current lookahead token is cleared,
read a new token. */
#define LA1 (tk == -1 ? (tk = yylex ()) : tk)
/* Is the current lookahead equal to the token T? */
#define LOOKING_AT(T) (tk == (T))
/* Is the current lookahead one of T1 or T2? */
#define LOOKING_AT2(T1, T2) (tk == (T1) || tk == (T2))
/* Is the current lookahead one of T1, T2 or T3? */
#define LOOKING_AT3(T1, T2, T3) (tk == (T1) || tk == (T2) || tk == (T3))
/* Is the current lookahead one of T1...T4? */
#define LOOKING_AT4(T1, T2, T3, T4) \
(tk == (T1) || tk == (T2) || tk == (T3) || tk == (T4))
/* Match token T if current lookahead is T. */
#define MATCH_IF(T) if (LOOKING_AT (T)) MATCH (); else ((void) 0)
/* Skip to matching token if current token is T. */
#define SKIP_MATCHING_IF(T) \
if (LOOKING_AT (T)) skip_matching (); else ((void) 0)
/* Skip forward until a given token TOKEN or YYEOF is seen and return
the current lookahead token after skipping. */
static int
skip_to (int token)
{
while (!LOOKING_AT2 (YYEOF, token))
MATCH ();
return tk;
}
/* Skip over pairs of tokens (parentheses, square brackets,
angle brackets, curly brackets) matching the current lookahead. */
static void
skip_matching (void)
{
int open, close, n;
switch (open = LA1)
{
case '{':
close = '}';
break;
case '(':
close = ')';
break;
case '<':
close = '>';
break;
case '[':
close = ']';
break;
default:
abort ();
}
for (n = 0;;)
{
if (LOOKING_AT (open))
++n;
else if (LOOKING_AT (close))
--n;
else if (LOOKING_AT (YYEOF))
break;
MATCH ();
if (n == 0)
break;
}
}
static void
skip_initializer (void)
{
for (;;)
{
switch (LA1)
{
case ';':
case ',':
case YYEOF:
return;
case '{':
case '[':
case '(':
skip_matching ();
break;
default:
MATCH ();
break;
}
}
}
/* Build qualified namespace alias (A::B::c) and return it. */
static struct link *
match_qualified_namespace_alias (void)
{
struct link *head = NULL;
struct link *cur = NULL;
struct link *tmp = NULL;
for (;;)
{
MATCH ();
switch (LA1)
{
case IDENT:
tmp = (struct link *) xmalloc (sizeof *cur);
tmp->sym = find_namespace (yytext, cur ? cur->sym : NULL);
tmp->next = NULL;
if (head)
{
cur = cur->next = tmp;
}
else
{
head = cur = tmp;
}
break;
case DCOLON:
/* Just skip */
break;
default:
return head;
break;
}
}
}
/* Re-initialize the parser by resetting the lookahead token. */
static void
re_init_parser (void)
{
tk = -1;
}
/* Parse a parameter list, including the const-specifier,
pure-specifier, and throw-list that may follow a parameter list.
Return in FLAGS what was seen following the parameter list.
Returns a hash code for the parameter types. This value is used to
distinguish between overloaded functions. */
static unsigned
parm_list (int *flags)
{
unsigned hash = 0;
int type_seen = 0;
while (!LOOKING_AT2 (YYEOF, ')'))
{
switch (LA1)
{
/* Skip over grouping parens or parameter lists in parameter
declarations. */
case '(':
skip_matching ();
break;
/* Next parameter. */
case ',':
MATCH ();
type_seen = 0;
break;
/* Ignore the scope part of types, if any. This is because
some types need scopes when defined outside of a class body,
and don't need them inside the class body. This means that
we have to look for the last IDENT in a sequence of
IDENT::IDENT::... */
case IDENT:
if (!type_seen)
{
char *last_id;
unsigned ident_type_hash = 0;
parse_qualified_param_ident_or_type (&last_id);
if (last_id)
{
/* LAST_ID null means something like `X::*'. */
for (; *last_id; ++last_id)
ident_type_hash = (ident_type_hash << 1) ^ *last_id;
hash = (hash << 1) ^ ident_type_hash;
type_seen = 1;
}
}
else
MATCH ();
break;
case VOID:
/* This distinction is made to make `func (void)' equivalent
to `func ()'. */
type_seen = 1;
MATCH ();
if (!LOOKING_AT (')'))
hash = (hash << 1) ^ VOID;
break;
case BOOL: case CHAR: case CLASS: case CONST:
case DOUBLE: case ENUM: case FLOAT: case INT:
case LONG: case SHORT: case SIGNED: case STRUCT:
case UNION: case UNSIGNED: case VOLATILE: case WCHAR:
case ELLIPSIS:
type_seen = 1;
hash = (hash << 1) ^ LA1;
MATCH ();
break;
case '*': case '&': case '[': case ']':
hash = (hash << 1) ^ LA1;
MATCH ();
break;
default:
MATCH ();
break;
}
}
if (LOOKING_AT (')'))
{
MATCH ();
if (LOOKING_AT (CONST))
{
/* We can overload the same function on `const' */
hash = (hash << 1) ^ CONST;
set_flag (flags, F_CONST);
MATCH ();
}
if (LOOKING_AT (THROW))
{
MATCH ();
SKIP_MATCHING_IF ('(');
set_flag (flags, F_THROW);
}
if (LOOKING_AT ('='))
{
MATCH ();
if (LOOKING_AT (CINT) && yyival == 0)
{
MATCH ();
set_flag (flags, F_PURE);
}
}
}
return hash;
}
/* Print position info to stdout. */
static void
print_info (void)
{
if (info_position >= 0 && BUFFER_POS () <= info_position)
if (info_cls)
printf ("(\"%s\" \"%s\" \"%s\" %d)\n",
info_cls->name, sym_scope (info_cls),
info_member->name, info_where);
}
/* Parse a member declaration within the class body of CLS. VIS is
the access specifier for the member (private, protected,
public). */
static void
member (struct sym *cls, int vis)
{
char *id = NULL;
int sc = SC_MEMBER;
char *regexp = NULL;
int pos;
int is_constructor;
int flags = 0;
int class_tag;
char *class_name;
int type_seen = 0;
int paren_seen = 0;
unsigned hash = 0;
int tilde = 0;
while (!LOOKING_AT4 (';', '{', '}', YYEOF))
{
switch (LA1)
{
default:
MATCH ();
break;
/* A function or class may follow. */
case TEMPLATE:
MATCH ();
set_flag (&flags, F_TEMPLATE);
/* Skip over template argument list */
SKIP_MATCHING_IF ('<');
break;
case EXPLICIT:
set_flag (&flags, F_EXPLICIT);
goto typeseen;
case MUTABLE:
set_flag (&flags, F_MUTABLE);
goto typeseen;
case T_INLINE:
set_flag (&flags, F_INLINE);
goto typeseen;
case VIRTUAL:
set_flag (&flags, F_VIRTUAL);
goto typeseen;
case '[':
skip_matching ();
break;
case ENUM:
sc = SC_TYPE;
goto typeseen;
case TYPEDEF:
sc = SC_TYPE;
goto typeseen;
case FRIEND:
sc = SC_FRIEND;
goto typeseen;
case STATIC:
sc = SC_STATIC;
goto typeseen;
case '~':
tilde = 1;
MATCH ();
break;
case IDENT:
/* Remember IDENTS seen so far. Among these will be the member
name. */
id = (char *) xrealloc (id, strlen (yytext) + 2);
if (tilde)
{
*id = '~';
strcpy (id + 1, yytext);
}
else
strcpy (id, yytext);
MATCH ();
break;
case OPERATOR:
{
char *s = operator_name (&sc);
id = (char *) xrealloc (id, strlen (s) + 1);
strcpy (id, s);
}
break;
case '(':
/* Most probably the beginning of a parameter list. */
MATCH ();
paren_seen = 1;
if (id && cls)
{
if (!(is_constructor = streq (id, cls->name)))
regexp = matching_regexp ();
}
else
is_constructor = 0;
pos = BUFFER_POS ();
hash = parm_list (&flags);
if (is_constructor)
regexp = matching_regexp ();
if (id && cls != NULL)
add_member_decl (cls, id, regexp, pos, hash, 0, sc, vis, flags);
while (!LOOKING_AT3 (';', '{', YYEOF))
MATCH ();
if (LOOKING_AT ('{') && id && cls)
add_member_defn (cls, id, regexp, pos, hash, 0, sc, flags);
free (id);
id = NULL;
sc = SC_MEMBER;
break;
case STRUCT: case UNION: case CLASS:
/* Nested class */
class_tag = LA1;
type_seen = 1;
MATCH ();
class_name = NULL;
/* More than one ident here to allow for MS-DOS specialties
like `_export class' etc. The last IDENT seen counts
as the class name. */
while (!LOOKING_AT4 (YYEOF, ';', ':', '{'))
{
if (LOOKING_AT (IDENT))
{
if (class_name)
{
int size = strlen (yytext);
if(strlen (class_name) < size)
{
class_name = (char *) xrealloc(class_name, size + 1);
}
memcpy(class_name, yytext, size + 1);
}
else
{
class_name = xstrdup(yytext);
}
}
MATCH ();
}
if (LOOKING_AT2 (':', '{'))
class_definition (class_name ? cls : NULL, class_name ? class_name : yytext, class_tag, flags, 1);
else
skip_to (';');
free(class_name);
break;
case INT: case CHAR: case LONG: case UNSIGNED:
case SIGNED: case CONST: case DOUBLE: case VOID:
case SHORT: case VOLATILE: case BOOL: case WCHAR:
case TYPENAME:
typeseen:
type_seen = 1;
MATCH ();
break;
}
}
if (LOOKING_AT (';'))
{
/* The end of a member variable, a friend declaration or an access
declaration. We don't want to add friend classes as members. */
if (id && sc != SC_FRIEND && cls)
{
regexp = matching_regexp ();
pos = BUFFER_POS ();
if (cls != NULL)
{
if (type_seen || !paren_seen)
add_member_decl (cls, id, regexp, pos, 0, 1, sc, vis, 0);
else
add_member_decl (cls, id, regexp, pos, hash, 0, sc, vis, 0);
}
}
MATCH ();
print_info ();
}
else if (LOOKING_AT ('{'))
{
/* A named enum. */
if (sc == SC_TYPE && id && cls)
{
regexp = matching_regexp ();
pos = BUFFER_POS ();
if (cls != NULL)
{
add_member_decl (cls, id, regexp, pos, 0, 1, sc, vis, 0);
add_member_defn (cls, id, regexp, pos, 0, 1, sc, 0);
}
}
skip_matching ();
print_info ();
}
free (id);
}
/* Parse the body of class CLS. TAG is the tag of the class (struct,
union, class). */
static void
class_body (struct sym *cls, int tag)
{
int vis = tag == CLASS ? PRIVATE : PUBLIC;
int temp;
while (!LOOKING_AT2 (YYEOF, '}'))
{
switch (LA1)
{
case PRIVATE: case PROTECTED: case PUBLIC:
temp = LA1;
MATCH ();
if (LOOKING_AT (':'))
{
vis = temp;
MATCH ();
}
else
{
/* Probably conditional compilation for inheritance list.
We don't known whether there comes more of this.
This is only a crude fix that works most of the time. */
do
{
MATCH ();
}
while (LOOKING_AT2 (IDENT, ',')
|| LOOKING_AT3 (PUBLIC, PROTECTED, PRIVATE));
}
break;
case TYPENAME:
case USING:
skip_to (';');
break;
/* Try to synchronize */
case CHAR: case CLASS: case CONST:
case DOUBLE: case ENUM: case FLOAT: case INT:
case LONG: case SHORT: case SIGNED: case STRUCT:
case UNION: case UNSIGNED: case VOID: case VOLATILE:
case TYPEDEF: case STATIC: case T_INLINE: case FRIEND:
case VIRTUAL: case TEMPLATE: case IDENT: case '~':
case BOOL: case WCHAR: case EXPLICIT: case MUTABLE:
member (cls, vis);
break;
default:
MATCH ();
break;
}
}
}
/* Parse a qualified identifier. Current lookahead is IDENT. A
qualified ident has the form `X<..>::Y<...>::T<...>. Returns a
symbol for that class. */
static struct sym *
parse_classname (void)
{
struct sym *last_class = NULL;
while (LOOKING_AT (IDENT))
{
last_class = add_sym (yytext, last_class);
MATCH ();
if (LOOKING_AT ('<'))
{
skip_matching ();
set_flag (&last_class->flags, F_TEMPLATE);
}
if (!LOOKING_AT (DCOLON))
break;
MATCH ();
}
return last_class;
}
/* Parse an operator name. Add the `static' flag to *SC if an
implicitly static operator has been parsed. Value is a pointer to
a static buffer holding the constructed operator name string. */
static char *
operator_name (int *sc)
{
static size_t id_size = 0;
static char *id = NULL;
const char *s;
size_t len;
MATCH ();
if (LOOKING_AT2 (NEW, DELETE))
{
/* `new' and `delete' are implicitly static. */
if (*sc != SC_FRIEND)
*sc = SC_STATIC;
s = token_string (LA1);
MATCH ();
ptrdiff_t slen = strlen (s);
len = slen + 10;
if (len > id_size)
{
size_t new_size = max (len, 2 * id_size);
id = (char *) xrealloc (id, new_size);
id_size = new_size;
}
char *z = stpcpy (id, s);
/* Vector new or delete? */
if (LOOKING_AT ('['))
{
z = stpcpy (z, "[");
MATCH ();
if (LOOKING_AT (']'))
{
strcpy (z, "]");
MATCH ();
}
}
}
else
{
size_t tokens_matched = 0;
len = 20;
if (len > id_size)
{
int new_size = max (len, 2 * id_size);
id = (char *) xrealloc (id, new_size);
id_size = new_size;
}
char *z = stpcpy (id, "operator");
/* Beware access declarations of the form "X::f;" Beware of
`operator () ()'. Yet another difficulty is found in
GCC 2.95's STL: `operator == __STL_NULL_TMPL_ARGS (...'. */
while (!(LOOKING_AT ('(') && tokens_matched)
&& !LOOKING_AT2 (';', YYEOF))
{
s = token_string (LA1);
len += strlen (s) + 2;
if (len > id_size)
{
ptrdiff_t idlen = z - id;
size_t new_size = max (len, 2 * id_size);
id = (char *) xrealloc (id, new_size);
id_size = new_size;
z = id + idlen;
}
if (*s != ')' && *s != ']')
*z++ = ' ';
z = stpcpy (z, s);
MATCH ();
/* If this is a simple operator like `+', stop now. */
if (!isalpha ((unsigned char) *s) && *s != '(' && *s != '[')
break;
++tokens_matched;
}
}
return id;
}
/* This one consumes the last IDENT of a qualified member name like
`X::Y::z'. This IDENT is returned in LAST_ID. Value is the
symbol structure for the ident. */
static struct sym *
parse_qualified_ident_or_type (char **last_id)
{
struct sym *cls = NULL;
char *id = NULL;
size_t id_size = 0;
int enter = 0;
while (LOOKING_AT (IDENT))
{
int len = strlen (yytext) + 1;
if (len > id_size)
{
id = (char *) xrealloc (id, len);
id_size = len;
}
strcpy (id, yytext);
*last_id = id;
MATCH ();
SKIP_MATCHING_IF ('<');
if (LOOKING_AT (DCOLON))
{
struct sym *pcn = NULL;
struct link *pna = check_namespace_alias (id);
if (pna)
{
do
{
enter_namespace (pna->sym->name);
enter++;
pna = pna->next;
}
while (pna);
}
else if ((pcn = check_namespace (id, current_namespace)))
{
enter_namespace (pcn->name);
enter++;
}
else
cls = add_sym (id, cls);
*last_id = NULL;
free (id);
id = NULL;
id_size = 0;
MATCH ();
}
else
break;
}
while (enter--)
leave_namespace ();
return cls;
}
/* This one consumes the last IDENT of a qualified member name like
`X::Y::z'. This IDENT is returned in LAST_ID. Value is the
symbol structure for the ident. */
static void
parse_qualified_param_ident_or_type (char **last_id)
{
struct sym *cls = NULL;
static char *id = NULL;
static int id_size = 0;
assert (LOOKING_AT (IDENT));
do
{
int len = strlen (yytext) + 1;
if (len > id_size)
{
id = (char *) xrealloc (id, len);
id_size = len;
}
strcpy (id, yytext);
*last_id = id;
MATCH ();
SKIP_MATCHING_IF ('<');
if (LOOKING_AT (DCOLON))
{
cls = add_sym (id, cls);
*last_id = NULL;
MATCH ();
}
else
break;
}
while (LOOKING_AT (IDENT));
}
/* Parse a class definition.
CONTAINING is the class containing the class being parsed or null.
This may also be null if NESTED != 0 if the containing class is
anonymous. TAG is the tag of the class (struct, union, class).
NESTED is non-zero if we are parsing a nested class.
Current lookahead is the class name. */
static void
class_definition (struct sym *containing, const char *class_name, int tag, int flags, int nested)
{
struct sym *current;
struct sym *base_class;
/* Set CURRENT to null if no entry has to be made for the class
parsed. This is the case for certain command line flag
settings. */
if ((tag != CLASS && !f_structs) || (nested && !f_nested_classes))
current = NULL;
else
{
current = add_sym (class_name, containing);
current->pos = BUFFER_POS ();
current->regexp = matching_regexp ();
current->filename = filename;
current->flags = flags;
}
/* If at ':', base class list follows. */
if (LOOKING_AT (':'))
{
int done = 0;
MATCH ();
while (!done)
{
switch (LA1)
{
case VIRTUAL: case PUBLIC: case PROTECTED: case PRIVATE:
MATCH ();
break;
case IDENT:
base_class = parse_classname ();
if (base_class && current && base_class != current)
add_link (base_class, current);
break;
/* The `,' between base classes or the end of the base
class list. Add the previously found base class.
It's done this way to skip over sequences of
`A::B::C' until we reach the end.
FIXME: it is now possible to handle `class X : public B::X'
because we have enough information. */
case ',':
MATCH ();
break;
default:
/* A syntax error, possibly due to preprocessor constructs
like
#ifdef SOMETHING
class A : public B
#else
class A : private B.
MATCH until we see something like `;' or `{'. */
while (!LOOKING_AT3 (';', YYEOF, '{'))
MATCH ();
FALLTHROUGH;
case '{':
done = 1;
break;
}
}
}
/* Parse the class body if there is one. */
if (LOOKING_AT ('{'))
{
if (tag != CLASS && !f_structs)
skip_matching ();
else
{
MATCH ();
class_body (current, tag);
if (LOOKING_AT ('}'))
{
MATCH ();
if (LOOKING_AT (';') && !nested)
MATCH ();
}
}
}
}
/* Add to class *CLS information for the declaration of variable or
type *ID. If *CLS is null, this means a global declaration. SC is
the storage class of *ID. FLAGS is a bit set giving additional
information about the member (see the F_* defines). */
static void
add_declarator (struct sym **cls, char **id, int flags, int sc)
{
if (LOOKING_AT2 (';', ','))
{
/* The end of a member variable or of an access declaration
`X::f'. To distinguish between them we have to know whether
type information has been seen. */
if (*id)
{
char *regexp = matching_regexp ();
int pos = BUFFER_POS ();
if (*cls)
add_member_defn (*cls, *id, regexp, pos, 0, 1, SC_UNKNOWN, flags);
else
add_global_defn (*id, regexp, pos, 0, 1, sc, flags);
}
MATCH ();
print_info ();
}
else if (LOOKING_AT ('{'))
{
if (sc == SC_TYPE && *id)
{
/* A named enumeration. */
char *regexp = matching_regexp ();
int pos = BUFFER_POS ();
add_global_defn (*id, regexp, pos, 0, 1, sc, flags);
}
skip_matching ();
print_info ();
}
free (*id);
*id = NULL;
*cls = NULL;
}
/* Parse a declaration. */
static void
declaration (int flags)
{
char *id = NULL;
struct sym *cls = NULL;
char *regexp = NULL;
int pos = 0;
unsigned hash = 0;
int is_constructor;
int sc = 0;
while (!LOOKING_AT3 (';', '{', YYEOF))
{
switch (LA1)
{
default:
MATCH ();
break;
case '[':
skip_matching ();
break;
case ENUM:
case TYPEDEF:
sc = SC_TYPE;
MATCH ();
break;
case STATIC:
sc = SC_STATIC;
MATCH ();
break;
case INT: case CHAR: case LONG: case UNSIGNED:
case SIGNED: case CONST: case DOUBLE: case VOID:
case SHORT: case VOLATILE: case BOOL: case WCHAR:
MATCH ();
break;
case CLASS: case STRUCT: case UNION:
/* This is for the case `STARTWRAP class X : ...' or
`declare (X, Y)\n class A : ...'. */
if (id)
{
free (id);
return;
}
FALLTHROUGH;
case '=':
/* Assumed to be the start of an initialization in this
context. */
skip_initializer ();
break;
case ',':
add_declarator (&cls, &id, flags, sc);
break;
case OPERATOR:
{
char *s = operator_name (&sc);
id = (char *) xrealloc (id, strlen (s) + 1);
strcpy (id, s);
}
break;
case T_INLINE:
set_flag (&flags, F_INLINE);
MATCH ();
break;
case '~':
MATCH ();
if (LOOKING_AT (IDENT))
{
id = (char *) xrealloc (id, strlen (yytext) + 2);
*id = '~';
strcpy (id + 1, yytext);
MATCH ();
}
break;
case IDENT:
cls = parse_qualified_ident_or_type (&id);
break;
case '(':
/* Most probably the beginning of a parameter list. */
if (cls)
{
MATCH ();
if (id && cls)
{
if (!(is_constructor = streq (id, cls->name)))
regexp = matching_regexp ();
}
else
is_constructor = 0;
pos = BUFFER_POS ();
hash = parm_list (&flags);
if (is_constructor)
regexp = matching_regexp ();
if (id && cls)
add_member_defn (cls, id, regexp, pos, hash, 0,
SC_UNKNOWN, flags);
}
else
{
/* This may be a C functions, but also a macro
call of the form `declare (A, B)' --- such macros
can be found in some class libraries. */
MATCH ();
if (id)
{
regexp = matching_regexp ();
pos = BUFFER_POS ();
hash = parm_list (&flags);
add_global_decl (id, regexp, pos, hash, 0, sc, flags);
}
/* This is for the case that the function really is
a macro with no `;' following it. If a CLASS directly
follows, we would miss it otherwise. */
if (LOOKING_AT3 (CLASS, STRUCT, UNION))
return;
}
while (!LOOKING_AT3 (';', '{', YYEOF))
MATCH ();
if (!cls && id && LOOKING_AT ('{'))
add_global_defn (id, regexp, pos, hash, 0, sc, flags);
free (id);
id = NULL;
break;
}
}
add_declarator (&cls, &id, flags, sc);
}
/* Parse a list of top-level declarations/definitions. START_FLAGS
says in which context we are parsing. If it is F_EXTERNC, we are
parsing in an `extern "C"' block. Value is 1 if EOF is reached, 0
otherwise. */
static int
globals (int start_flags)
{
int class_tk;
char *class_name;
int flags = start_flags;
for (;;)
{
char *prev_in = in;
switch (LA1)
{
case NAMESPACE:
{
MATCH ();
if (LOOKING_AT (IDENT))
{
char *namespace_name = xstrdup (yytext);
MATCH ();
if (LOOKING_AT ('='))
{
struct link *qna = match_qualified_namespace_alias ();
if (qna)
register_namespace_alias (namespace_name, qna);
if (skip_to (';') == ';')
MATCH ();
}
else if (LOOKING_AT ('{'))
{
MATCH ();
enter_namespace (namespace_name);
globals (0);
leave_namespace ();
MATCH_IF ('}');
}
free (namespace_name);
}
}
break;
case EXTERN:
MATCH ();
if (LOOKING_AT (CSTRING) && *string_start == 'C'
&& *(string_start + 1) == '"')
{
/* This is `extern "C"'. */
MATCH ();
if (LOOKING_AT ('{'))
{
MATCH ();
globals (F_EXTERNC);
MATCH_IF ('}');
}
else
set_flag (&flags, F_EXTERNC);
}
break;
case TEMPLATE:
MATCH ();
SKIP_MATCHING_IF ('<');
set_flag (&flags, F_TEMPLATE);
break;
case CLASS: case STRUCT: case UNION:
class_tk = LA1;
MATCH ();
class_name = NULL;
/* More than one ident here to allow for MS-DOS and OS/2
specialties like `far', `_Export' etc. Some C++ libs
have constructs like `_OS_DLLIMPORT(_OS_CLIENT)' in front
of the class name. */
while (!LOOKING_AT4 (YYEOF, ';', ':', '{'))
{
if (LOOKING_AT (IDENT))
{
if (class_name)
{
int size = strlen (yytext);
if(strlen (class_name) < size)
{
class_name = (char *) xrealloc(class_name, size + 1);
}
memcpy(class_name, yytext, size + 1);
}
else
{
class_name = xstrdup(yytext);
}
}
MATCH ();
}
/* Don't add anonymous unions. */
if (LOOKING_AT2 (':', '{') && class_name)
class_definition (NULL, class_name, class_tk, flags, 0);
else
{
if (skip_to (';') == ';')
MATCH ();
}
free(class_name);
flags = start_flags;
break;
case YYEOF:
return 1;
case '}':
return 0;
default:
declaration (flags);
flags = start_flags;
break;
}
if (prev_in == in)
yyerror ("parse error", NULL);
}
}
/* Parse the current input file. */
static void
yyparse (void)
{
while (globals (0) == 0)
MATCH_IF ('}');
}
/***********************************************************************
Main Program
***********************************************************************/
/* Add the list of paths PATH_LIST to the current search path for
input files. */
static void
add_search_path (char *path_list)
{
while (*path_list)
{
char *start = path_list;
struct search_path *p;
while (*path_list && *path_list != SEPCHAR)
++path_list;
p = (struct search_path *) xmalloc (sizeof *p);
p->path = (char *) xmalloc (path_list - start + 1);
memcpy (p->path, start, path_list - start);
p->path[path_list - start] = '\0';
p->next = NULL;
if (search_path_tail)
{
search_path_tail->next = p;
search_path_tail = p;
}
else
search_path = search_path_tail = p;
while (*path_list == SEPCHAR)
++path_list;
}
}
/* Open FILE and return a file handle for it, or -1 if FILE cannot be
opened. Try to find FILE in search_path first, then try the
unchanged file name. */
static FILE *
open_file (char *file)
{
FILE *fp = NULL;
static char *buffer;
static int buffer_size;
struct search_path *path;
int flen = strlen (file) + 1; /* +1 for the slash */
filename = xstrdup (file);
for (path = search_path; path && fp == NULL; path = path->next)
{
int len = strlen (path->path) + flen;
if (len + 1 >= buffer_size)
{
buffer_size = max (len + 1, 2 * buffer_size);
buffer = (char *) xrealloc (buffer, buffer_size);
}
char *z = stpcpy (buffer, path->path);
*z++ = '/';
strcpy (z, file);
fp = fopen (buffer, "r");
}
/* Try the original file name. */
if (fp == NULL)
fp = fopen (file, "r");
if (fp == NULL)
yyerror ("cannot open", NULL);
return fp;
}
/* Display usage information and exit program. */
static char const *const usage_message[] =
{
"\
Usage: ebrowse [options] {files}\n\
\n\
-a, --append append output to existing file\n\
-f, --files=FILES read input file names from FILE\n\
-I, --search-path=LIST set search path for input files\n\
-m, --min-regexp-length=N set minimum regexp length to N\n\
-M, --max-regexp-length=N set maximum regexp length to N\n\
",
"\
-n, --no-nested-classes exclude nested classes\n\
-o, --output-file=FILE set output file name to FILE\n\
-p, --position-info print info about position in file\n\
-s, --no-structs-or-unions don't record structs or unions\n\
-v, --verbose be verbose\n\
-V, --very-verbose be very verbose\n\
-x, --no-regexps don't record regular expressions\n\
--help display this help\n\
--version display version info\n\
\n\
"
};
static _Noreturn void
usage (int error)
{
int i;
for (i = 0; i < sizeof usage_message / sizeof *usage_message; i++)
fputs (usage_message[i], stdout);
exit (error ? EXIT_FAILURE : EXIT_SUCCESS);
}
/* Display version and copyright info. */
static _Noreturn void
version (void)
{
fputs (("ebrowse " PACKAGE_VERSION "\n"
COPYRIGHT "\n"
"This program is distributed under the same terms as Emacs.\n"),
stdout);
exit (EXIT_SUCCESS);
}
/* Parse one input file FILE, adding classes and members to the symbol
table. */
static void
process_file (char *file)
{
FILE *fp;
fp = open_file (file);
if (fp)
{
size_t nread, nbytes;
/* Give a progress indication if needed. */
if (f_very_verbose)
{
puts (filename);
fflush (stdout);
}
else if (f_verbose)
{
putchar ('.');
fflush (stdout);
}
/* Read file to inbuffer. */
for (nread = 0;;)
{
if (nread + READ_CHUNK_SIZE >= inbuffer_size)
{
inbuffer_size = nread + READ_CHUNK_SIZE + 1;
inbuffer = (char *) xrealloc (inbuffer, inbuffer_size);
}
nbytes = fread (inbuffer + nread, 1, READ_CHUNK_SIZE, fp);
if (nbytes == 0)
break;
nread += nbytes;
}
inbuffer[nread] = '\0';
/* Reinitialize scanner and parser for the new input file. */
re_init_scanner ();
re_init_parser ();
/* Parse it and close the file. */
yyparse ();
fclose (fp);
}
}
/* Read a line from stream FP and return a pointer to a static buffer
containing its contents without the terminating newline. Value
is null when EOF is reached. */
static char *
read_line (FILE *fp)
{
static char *buffer;
static int buffer_size;
int i = 0, c;
while ((c = getc (fp)) != EOF && c != '\n')
{
if (i >= buffer_size)
{
buffer_size = max (100, buffer_size * 2);
buffer = (char *) xrealloc (buffer, buffer_size);
}
buffer[i++] = c;
}
if (c == EOF && i == 0)
return NULL;
if (i == buffer_size)
{
buffer_size = max (100, buffer_size * 2);
buffer = (char *) xrealloc (buffer, buffer_size);
}
buffer[i] = '\0';
if (i > 0 && buffer[i - 1] == '\r')
buffer[i - 1] = '\0';
return buffer;
}
/* Main entry point. */
int
main (int argc, char **argv)
{
int i;
int any_inputfiles = 0;
static const char *out_filename = DEFAULT_OUTFILE;
static char **input_filenames = NULL;
static int input_filenames_size = 0;
static int n_input_files;
filename = "command line";
yyout = stdout;
while ((i = getopt_long (argc, argv, "af:I:m:M:no:p:svVx",
options, NULL)) != EOF)
{
switch (i)
{
/* Experimental. */
case 'p':
info_position = atoi (optarg);
break;
case 'n':
f_nested_classes = 0;
break;
case 'x':
f_regexps = 0;
break;
/* Add the name of a file containing more input files. */
case 'f':
if (n_input_files == input_filenames_size)
{
input_filenames_size = max (10, 2 * input_filenames_size);
input_filenames = (char **) xrealloc ((void *)input_filenames,
input_filenames_size);
}
input_filenames[n_input_files++] = xstrdup (optarg);
break;
/* Append new output to output file instead of truncating it. */
case 'a':
f_append = 1;
break;
/* Include structs in the output */
case 's':
f_structs = 0;
break;
/* Be verbose (give a progress indication). */
case 'v':
f_verbose = 1;
break;
/* Be very verbose (print file names as they are processed). */
case 'V':
f_verbose = 1;
f_very_verbose = 1;
break;
/* Change the name of the output file. */
case 'o':
out_filename = optarg;
break;
/* Set minimum length for regular expression strings
when recorded in the output file. */
case 'm':
min_regexp = atoi (optarg);
break;
/* Set maximum length for regular expression strings
when recorded in the output file. */
case 'M':
max_regexp = atoi (optarg);
break;
/* Add to search path. */
case 'I':
add_search_path (optarg);
break;
/* Display help */
case -2:
usage (0);
break;
case -3:
version ();
break;
}
}
/* Call init_scanner after command line flags have been processed to be
able to add keywords depending on command line (not yet
implemented). */
init_scanner ();
init_sym ();
/* Open output file */
if (*out_filename)
{
if (f_append)
{
/* Check that the file to append to exists, and is not
empty. More specifically, it should be a valid file
produced by a previous run of ebrowse, but that's too
difficult to check. */
FILE *fp;
int rc;
fp = fopen (out_filename, "r");
if (fp == NULL)
{
yyerror ("file '%s' must exist for --append", out_filename);
exit (EXIT_FAILURE);
}
rc = fseek (fp, 0, SEEK_END);
if (rc == -1)
{
yyerror ("error seeking in file '%s'", out_filename);
exit (EXIT_FAILURE);
}
rc = ftell (fp);
if (rc == -1)
{
yyerror ("error getting size of file '%s'", out_filename);
exit (EXIT_FAILURE);
}
else if (rc == 0)
{
yyerror ("file '%s' is empty", out_filename);
/* It may be ok to use an empty file for appending.
exit (EXIT_FAILURE); */
}
fclose (fp);
}
yyout = fopen (out_filename, f_append ? "a" : "w");
if (yyout == NULL)
{
yyerror ("cannot open output file '%s'", out_filename);
exit (EXIT_FAILURE);
}
}
/* Process input files specified on the command line. */
while (optind < argc)
{
process_file (argv[optind++]);
any_inputfiles = 1;
}
/* Process files given on stdin if no files specified. */
if (!any_inputfiles && n_input_files == 0)
{
char *file;
while ((file = read_line (stdin)) != NULL)
process_file (file);
}
else
{
/* Process files from `--files=FILE'. Every line in FILE names
one input file to process. */
for (i = 0; i < n_input_files; ++i)
{
FILE *fp = fopen (input_filenames[i], "r");
if (fp == NULL)
yyerror ("cannot open input file '%s'", input_filenames[i]);
else
{
char *file;
while ((file = read_line (fp)) != NULL)
process_file (file);
fclose (fp);
}
}
}
/* Write output file. */
dump_roots (yyout);
/* Close output file. */
if (yyout != stdout)
fclose (yyout);
return EXIT_SUCCESS;
}
/* ebrowse.c ends here */
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