1053 lines
28 KiB
C
1053 lines
28 KiB
C
/* Mainly the interface between cpplib and the C front ends.
|
||
Copyright (C) 1987, 1988, 1989, 1992, 1994, 1995, 1996, 1997
|
||
1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
|
||
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 3, 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 COPYING3. If not see
|
||
<http://www.gnu.org/licenses/>. */
|
||
|
||
#include "config.h"
|
||
#include "system.h"
|
||
#include "coretypes.h"
|
||
#include "tm.h"
|
||
|
||
#include "real.h"
|
||
#include "rtl.h"
|
||
#include "tree.h"
|
||
#include "input.h"
|
||
#include "output.h"
|
||
#include "c-tree.h"
|
||
#include "c-common.h"
|
||
#include "flags.h"
|
||
#include "timevar.h"
|
||
#include "cpplib.h"
|
||
#include "c-pragma.h"
|
||
#include "toplev.h"
|
||
#include "intl.h"
|
||
#include "tm_p.h"
|
||
#include "splay-tree.h"
|
||
#include "debug.h"
|
||
#include "target.h"
|
||
|
||
/* We may keep statistics about how long which files took to compile. */
|
||
static int header_time, body_time;
|
||
static splay_tree file_info_tree;
|
||
|
||
int pending_lang_change; /* If we need to switch languages - C++ only */
|
||
int c_header_level; /* depth in C headers - C++ only */
|
||
|
||
static tree interpret_integer (const cpp_token *, unsigned int);
|
||
static tree interpret_float (const cpp_token *, unsigned int);
|
||
static tree interpret_fixed (const cpp_token *, unsigned int);
|
||
static enum integer_type_kind narrowest_unsigned_type
|
||
(unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, unsigned int);
|
||
static enum integer_type_kind narrowest_signed_type
|
||
(unsigned HOST_WIDE_INT, unsigned HOST_WIDE_INT, unsigned int);
|
||
static enum cpp_ttype lex_string (const cpp_token *, tree *, bool, bool);
|
||
static tree lex_charconst (const cpp_token *);
|
||
static void update_header_times (const char *);
|
||
static int dump_one_header (splay_tree_node, void *);
|
||
static void cb_line_change (cpp_reader *, const cpp_token *, int);
|
||
static void cb_ident (cpp_reader *, unsigned int, const cpp_string *);
|
||
static void cb_def_pragma (cpp_reader *, unsigned int);
|
||
static void cb_define (cpp_reader *, unsigned int, cpp_hashnode *);
|
||
static void cb_undef (cpp_reader *, unsigned int, cpp_hashnode *);
|
||
|
||
void
|
||
init_c_lex (void)
|
||
{
|
||
struct cpp_callbacks *cb;
|
||
struct c_fileinfo *toplevel;
|
||
|
||
/* The get_fileinfo data structure must be initialized before
|
||
cpp_read_main_file is called. */
|
||
toplevel = get_fileinfo ("<top level>");
|
||
if (flag_detailed_statistics)
|
||
{
|
||
header_time = 0;
|
||
body_time = get_run_time ();
|
||
toplevel->time = body_time;
|
||
}
|
||
|
||
cb = cpp_get_callbacks (parse_in);
|
||
|
||
cb->line_change = cb_line_change;
|
||
cb->ident = cb_ident;
|
||
cb->def_pragma = cb_def_pragma;
|
||
cb->valid_pch = c_common_valid_pch;
|
||
cb->read_pch = c_common_read_pch;
|
||
|
||
/* Set the debug callbacks if we can use them. */
|
||
if (debug_info_level == DINFO_LEVEL_VERBOSE
|
||
&& (write_symbols == DWARF2_DEBUG
|
||
|| write_symbols == VMS_AND_DWARF2_DEBUG))
|
||
{
|
||
cb->define = cb_define;
|
||
cb->undef = cb_undef;
|
||
}
|
||
}
|
||
|
||
struct c_fileinfo *
|
||
get_fileinfo (const char *name)
|
||
{
|
||
splay_tree_node n;
|
||
struct c_fileinfo *fi;
|
||
|
||
if (!file_info_tree)
|
||
file_info_tree = splay_tree_new ((splay_tree_compare_fn) strcmp,
|
||
0,
|
||
(splay_tree_delete_value_fn) free);
|
||
|
||
n = splay_tree_lookup (file_info_tree, (splay_tree_key) name);
|
||
if (n)
|
||
return (struct c_fileinfo *) n->value;
|
||
|
||
fi = XNEW (struct c_fileinfo);
|
||
fi->time = 0;
|
||
fi->interface_only = 0;
|
||
fi->interface_unknown = 1;
|
||
splay_tree_insert (file_info_tree, (splay_tree_key) name,
|
||
(splay_tree_value) fi);
|
||
return fi;
|
||
}
|
||
|
||
static void
|
||
update_header_times (const char *name)
|
||
{
|
||
/* Changing files again. This means currently collected time
|
||
is charged against header time, and body time starts back at 0. */
|
||
if (flag_detailed_statistics)
|
||
{
|
||
int this_time = get_run_time ();
|
||
struct c_fileinfo *file = get_fileinfo (name);
|
||
header_time += this_time - body_time;
|
||
file->time += this_time - body_time;
|
||
body_time = this_time;
|
||
}
|
||
}
|
||
|
||
static int
|
||
dump_one_header (splay_tree_node n, void * ARG_UNUSED (dummy))
|
||
{
|
||
print_time ((const char *) n->key,
|
||
((struct c_fileinfo *) n->value)->time);
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
dump_time_statistics (void)
|
||
{
|
||
struct c_fileinfo *file = get_fileinfo (input_filename);
|
||
int this_time = get_run_time ();
|
||
file->time += this_time - body_time;
|
||
|
||
fprintf (stderr, "\n******\n");
|
||
print_time ("header files (total)", header_time);
|
||
print_time ("main file (total)", this_time - body_time);
|
||
fprintf (stderr, "ratio = %g : 1\n",
|
||
(double) header_time / (double) (this_time - body_time));
|
||
fprintf (stderr, "\n******\n");
|
||
|
||
splay_tree_foreach (file_info_tree, dump_one_header, 0);
|
||
}
|
||
|
||
static void
|
||
cb_ident (cpp_reader * ARG_UNUSED (pfile),
|
||
unsigned int ARG_UNUSED (line),
|
||
const cpp_string * ARG_UNUSED (str))
|
||
{
|
||
#ifdef ASM_OUTPUT_IDENT
|
||
if (!flag_no_ident)
|
||
{
|
||
/* Convert escapes in the string. */
|
||
cpp_string cstr = { 0, 0 };
|
||
if (cpp_interpret_string (pfile, str, 1, &cstr, CPP_STRING))
|
||
{
|
||
ASM_OUTPUT_IDENT (asm_out_file, (const char *) cstr.text);
|
||
free (CONST_CAST (unsigned char *, cstr.text));
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
|
||
/* Called at the start of every non-empty line. TOKEN is the first
|
||
lexed token on the line. Used for diagnostic line numbers. */
|
||
static void
|
||
cb_line_change (cpp_reader * ARG_UNUSED (pfile), const cpp_token *token,
|
||
int parsing_args)
|
||
{
|
||
if (token->type != CPP_EOF && !parsing_args)
|
||
input_location = token->src_loc;
|
||
}
|
||
|
||
void
|
||
fe_file_change (const struct line_map *new_map)
|
||
{
|
||
if (new_map == NULL)
|
||
return;
|
||
|
||
if (new_map->reason == LC_ENTER)
|
||
{
|
||
/* Don't stack the main buffer on the input stack;
|
||
we already did in compile_file. */
|
||
if (!MAIN_FILE_P (new_map))
|
||
{
|
||
unsigned int included_at = LAST_SOURCE_LINE_LOCATION (new_map - 1);
|
||
int line = 0;
|
||
if (included_at > BUILTINS_LOCATION)
|
||
line = SOURCE_LINE (new_map - 1, included_at);
|
||
|
||
input_location = new_map->start_location;
|
||
(*debug_hooks->start_source_file) (line, new_map->to_file);
|
||
#ifndef NO_IMPLICIT_EXTERN_C
|
||
if (c_header_level)
|
||
++c_header_level;
|
||
else if (new_map->sysp == 2)
|
||
{
|
||
c_header_level = 1;
|
||
++pending_lang_change;
|
||
}
|
||
#endif
|
||
}
|
||
}
|
||
else if (new_map->reason == LC_LEAVE)
|
||
{
|
||
#ifndef NO_IMPLICIT_EXTERN_C
|
||
if (c_header_level && --c_header_level == 0)
|
||
{
|
||
if (new_map->sysp == 2)
|
||
warning (0, "badly nested C headers from preprocessor");
|
||
--pending_lang_change;
|
||
}
|
||
#endif
|
||
input_location = new_map->start_location;
|
||
|
||
(*debug_hooks->end_source_file) (new_map->to_line);
|
||
}
|
||
|
||
update_header_times (new_map->to_file);
|
||
input_location = new_map->start_location;
|
||
}
|
||
|
||
static void
|
||
cb_def_pragma (cpp_reader *pfile, source_location loc)
|
||
{
|
||
/* Issue a warning message if we have been asked to do so. Ignore
|
||
unknown pragmas in system headers unless an explicit
|
||
-Wunknown-pragmas has been given. */
|
||
if (warn_unknown_pragmas > in_system_header)
|
||
{
|
||
const unsigned char *space, *name;
|
||
const cpp_token *s;
|
||
location_t fe_loc = loc;
|
||
|
||
space = name = (const unsigned char *) "";
|
||
s = cpp_get_token (pfile);
|
||
if (s->type != CPP_EOF)
|
||
{
|
||
space = cpp_token_as_text (pfile, s);
|
||
s = cpp_get_token (pfile);
|
||
if (s->type == CPP_NAME)
|
||
name = cpp_token_as_text (pfile, s);
|
||
}
|
||
|
||
warning_at (fe_loc, OPT_Wunknown_pragmas, "ignoring #pragma %s %s",
|
||
space, name);
|
||
}
|
||
}
|
||
|
||
/* #define callback for DWARF and DWARF2 debug info. */
|
||
static void
|
||
cb_define (cpp_reader *pfile, source_location loc, cpp_hashnode *node)
|
||
{
|
||
const struct line_map *map = linemap_lookup (line_table, loc);
|
||
(*debug_hooks->define) (SOURCE_LINE (map, loc),
|
||
(const char *) cpp_macro_definition (pfile, node));
|
||
}
|
||
|
||
/* #undef callback for DWARF and DWARF2 debug info. */
|
||
static void
|
||
cb_undef (cpp_reader * ARG_UNUSED (pfile), source_location loc,
|
||
cpp_hashnode *node)
|
||
{
|
||
const struct line_map *map = linemap_lookup (line_table, loc);
|
||
(*debug_hooks->undef) (SOURCE_LINE (map, loc),
|
||
(const char *) NODE_NAME (node));
|
||
}
|
||
|
||
/* Read a token and return its type. Fill *VALUE with its value, if
|
||
applicable. Fill *CPP_FLAGS with the token's flags, if it is
|
||
non-NULL. */
|
||
|
||
enum cpp_ttype
|
||
c_lex_with_flags (tree *value, location_t *loc, unsigned char *cpp_flags,
|
||
int lex_flags)
|
||
{
|
||
static bool no_more_pch;
|
||
const cpp_token *tok;
|
||
enum cpp_ttype type;
|
||
unsigned char add_flags = 0;
|
||
|
||
timevar_push (TV_CPP);
|
||
retry:
|
||
tok = cpp_get_token_with_location (parse_in, loc);
|
||
type = tok->type;
|
||
|
||
retry_after_at:
|
||
switch (type)
|
||
{
|
||
case CPP_PADDING:
|
||
goto retry;
|
||
|
||
case CPP_NAME:
|
||
*value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node.node));
|
||
break;
|
||
|
||
case CPP_NUMBER:
|
||
{
|
||
unsigned int flags = cpp_classify_number (parse_in, tok);
|
||
|
||
switch (flags & CPP_N_CATEGORY)
|
||
{
|
||
case CPP_N_INVALID:
|
||
/* cpplib has issued an error. */
|
||
*value = error_mark_node;
|
||
errorcount++;
|
||
break;
|
||
|
||
case CPP_N_INTEGER:
|
||
/* C++ uses '0' to mark virtual functions as pure.
|
||
Set PURE_ZERO to pass this information to the C++ parser. */
|
||
if (tok->val.str.len == 1 && *tok->val.str.text == '0')
|
||
add_flags = PURE_ZERO;
|
||
*value = interpret_integer (tok, flags);
|
||
break;
|
||
|
||
case CPP_N_FLOATING:
|
||
*value = interpret_float (tok, flags);
|
||
break;
|
||
|
||
default:
|
||
gcc_unreachable ();
|
||
}
|
||
}
|
||
break;
|
||
|
||
case CPP_ATSIGN:
|
||
/* An @ may give the next token special significance in Objective-C. */
|
||
if (c_dialect_objc ())
|
||
{
|
||
location_t atloc = *loc;
|
||
location_t newloc;
|
||
|
||
retry_at:
|
||
tok = cpp_get_token_with_location (parse_in, &newloc);
|
||
type = tok->type;
|
||
switch (type)
|
||
{
|
||
case CPP_PADDING:
|
||
goto retry_at;
|
||
|
||
case CPP_STRING:
|
||
case CPP_WSTRING:
|
||
case CPP_STRING16:
|
||
case CPP_STRING32:
|
||
case CPP_UTF8STRING:
|
||
type = lex_string (tok, value, true, true);
|
||
break;
|
||
|
||
case CPP_NAME:
|
||
*value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node.node));
|
||
if (objc_is_reserved_word (*value))
|
||
{
|
||
type = CPP_AT_NAME;
|
||
break;
|
||
}
|
||
/* FALLTHROUGH */
|
||
|
||
default:
|
||
/* ... or not. */
|
||
error_at (atloc, "stray %<@%> in program");
|
||
*loc = newloc;
|
||
goto retry_after_at;
|
||
}
|
||
break;
|
||
}
|
||
|
||
/* FALLTHROUGH */
|
||
case CPP_HASH:
|
||
case CPP_PASTE:
|
||
{
|
||
unsigned char name[8];
|
||
|
||
*cpp_spell_token (parse_in, tok, name, true) = 0;
|
||
|
||
error ("stray %qs in program", name);
|
||
}
|
||
|
||
goto retry;
|
||
|
||
case CPP_OTHER:
|
||
{
|
||
cppchar_t c = tok->val.str.text[0];
|
||
|
||
if (c == '"' || c == '\'')
|
||
error ("missing terminating %c character", (int) c);
|
||
else if (ISGRAPH (c))
|
||
error ("stray %qc in program", (int) c);
|
||
else
|
||
error ("stray %<\\%o%> in program", (int) c);
|
||
}
|
||
goto retry;
|
||
|
||
case CPP_CHAR:
|
||
case CPP_WCHAR:
|
||
case CPP_CHAR16:
|
||
case CPP_CHAR32:
|
||
*value = lex_charconst (tok);
|
||
break;
|
||
|
||
case CPP_STRING:
|
||
case CPP_WSTRING:
|
||
case CPP_STRING16:
|
||
case CPP_STRING32:
|
||
case CPP_UTF8STRING:
|
||
if ((lex_flags & C_LEX_STRING_NO_JOIN) == 0)
|
||
{
|
||
type = lex_string (tok, value, false,
|
||
(lex_flags & C_LEX_STRING_NO_TRANSLATE) == 0);
|
||
break;
|
||
}
|
||
*value = build_string (tok->val.str.len, (const char *) tok->val.str.text);
|
||
break;
|
||
|
||
case CPP_PRAGMA:
|
||
*value = build_int_cst (NULL, tok->val.pragma);
|
||
break;
|
||
|
||
/* These tokens should not be visible outside cpplib. */
|
||
case CPP_HEADER_NAME:
|
||
case CPP_COMMENT:
|
||
case CPP_MACRO_ARG:
|
||
gcc_unreachable ();
|
||
|
||
default:
|
||
*value = NULL_TREE;
|
||
break;
|
||
}
|
||
|
||
if (cpp_flags)
|
||
*cpp_flags = tok->flags | add_flags;
|
||
|
||
if (!no_more_pch)
|
||
{
|
||
no_more_pch = true;
|
||
c_common_no_more_pch ();
|
||
}
|
||
|
||
timevar_pop (TV_CPP);
|
||
|
||
return type;
|
||
}
|
||
|
||
/* Returns the narrowest C-visible unsigned type, starting with the
|
||
minimum specified by FLAGS, that can fit HIGH:LOW, or itk_none if
|
||
there isn't one. */
|
||
|
||
static enum integer_type_kind
|
||
narrowest_unsigned_type (unsigned HOST_WIDE_INT low,
|
||
unsigned HOST_WIDE_INT high,
|
||
unsigned int flags)
|
||
{
|
||
int itk;
|
||
|
||
if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
|
||
itk = itk_unsigned_int;
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM)
|
||
itk = itk_unsigned_long;
|
||
else
|
||
itk = itk_unsigned_long_long;
|
||
|
||
for (; itk < itk_none; itk += 2 /* skip unsigned types */)
|
||
{
|
||
tree upper = TYPE_MAX_VALUE (integer_types[itk]);
|
||
|
||
if ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) > high
|
||
|| ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) == high
|
||
&& TREE_INT_CST_LOW (upper) >= low))
|
||
return (enum integer_type_kind) itk;
|
||
}
|
||
|
||
return itk_none;
|
||
}
|
||
|
||
/* Ditto, but narrowest signed type. */
|
||
static enum integer_type_kind
|
||
narrowest_signed_type (unsigned HOST_WIDE_INT low,
|
||
unsigned HOST_WIDE_INT high, unsigned int flags)
|
||
{
|
||
int itk;
|
||
|
||
if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
|
||
itk = itk_int;
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM)
|
||
itk = itk_long;
|
||
else
|
||
itk = itk_long_long;
|
||
|
||
|
||
for (; itk < itk_none; itk += 2 /* skip signed types */)
|
||
{
|
||
tree upper = TYPE_MAX_VALUE (integer_types[itk]);
|
||
|
||
if ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) > high
|
||
|| ((unsigned HOST_WIDE_INT) TREE_INT_CST_HIGH (upper) == high
|
||
&& TREE_INT_CST_LOW (upper) >= low))
|
||
return (enum integer_type_kind) itk;
|
||
}
|
||
|
||
return itk_none;
|
||
}
|
||
|
||
/* Interpret TOKEN, an integer with FLAGS as classified by cpplib. */
|
||
static tree
|
||
interpret_integer (const cpp_token *token, unsigned int flags)
|
||
{
|
||
tree value, type;
|
||
enum integer_type_kind itk;
|
||
cpp_num integer;
|
||
cpp_options *options = cpp_get_options (parse_in);
|
||
|
||
integer = cpp_interpret_integer (parse_in, token, flags);
|
||
integer = cpp_num_sign_extend (integer, options->precision);
|
||
|
||
/* The type of a constant with a U suffix is straightforward. */
|
||
if (flags & CPP_N_UNSIGNED)
|
||
itk = narrowest_unsigned_type (integer.low, integer.high, flags);
|
||
else
|
||
{
|
||
/* The type of a potentially-signed integer constant varies
|
||
depending on the base it's in, the standard in use, and the
|
||
length suffixes. */
|
||
enum integer_type_kind itk_u
|
||
= narrowest_unsigned_type (integer.low, integer.high, flags);
|
||
enum integer_type_kind itk_s
|
||
= narrowest_signed_type (integer.low, integer.high, flags);
|
||
|
||
/* In both C89 and C99, octal and hex constants may be signed or
|
||
unsigned, whichever fits tighter. We do not warn about this
|
||
choice differing from the traditional choice, as the constant
|
||
is probably a bit pattern and either way will work. */
|
||
if ((flags & CPP_N_RADIX) != CPP_N_DECIMAL)
|
||
itk = MIN (itk_u, itk_s);
|
||
else
|
||
{
|
||
/* In C99, decimal constants are always signed.
|
||
In C89, decimal constants that don't fit in long have
|
||
undefined behavior; we try to make them unsigned long.
|
||
In GCC's extended C89, that last is true of decimal
|
||
constants that don't fit in long long, too. */
|
||
|
||
itk = itk_s;
|
||
if (itk_s > itk_u && itk_s > itk_long)
|
||
{
|
||
if (!flag_isoc99)
|
||
{
|
||
if (itk_u < itk_unsigned_long)
|
||
itk_u = itk_unsigned_long;
|
||
itk = itk_u;
|
||
warning (0, "this decimal constant is unsigned only in ISO C90");
|
||
}
|
||
else
|
||
warning (OPT_Wtraditional,
|
||
"this decimal constant would be unsigned in ISO C90");
|
||
}
|
||
}
|
||
}
|
||
|
||
if (itk == itk_none)
|
||
/* cpplib has already issued a warning for overflow. */
|
||
type = ((flags & CPP_N_UNSIGNED)
|
||
? widest_unsigned_literal_type_node
|
||
: widest_integer_literal_type_node);
|
||
else
|
||
{
|
||
type = integer_types[itk];
|
||
if (itk > itk_unsigned_long
|
||
&& (flags & CPP_N_WIDTH) != CPP_N_LARGE)
|
||
emit_diagnostic
|
||
((c_dialect_cxx () ? cxx_dialect == cxx98 : !flag_isoc99)
|
||
? DK_PEDWARN : DK_WARNING,
|
||
input_location, OPT_Wlong_long,
|
||
(flags & CPP_N_UNSIGNED)
|
||
? "integer constant is too large for %<unsigned long%> type"
|
||
: "integer constant is too large for %<long%> type");
|
||
}
|
||
|
||
value = build_int_cst_wide (type, integer.low, integer.high);
|
||
|
||
/* Convert imaginary to a complex type. */
|
||
if (flags & CPP_N_IMAGINARY)
|
||
value = build_complex (NULL_TREE, build_int_cst (type, 0), value);
|
||
|
||
return value;
|
||
}
|
||
|
||
/* Interpret TOKEN, a floating point number with FLAGS as classified
|
||
by cpplib. */
|
||
static tree
|
||
interpret_float (const cpp_token *token, unsigned int flags)
|
||
{
|
||
tree type;
|
||
tree const_type;
|
||
tree value;
|
||
REAL_VALUE_TYPE real;
|
||
REAL_VALUE_TYPE real_trunc;
|
||
char *copy;
|
||
size_t copylen;
|
||
|
||
/* Default (no suffix) depends on whether the FLOAT_CONST_DECIMAL64
|
||
pragma has been used and is either double or _Decimal64. Types
|
||
that are not allowed with decimal float default to double. */
|
||
if (flags & CPP_N_DEFAULT)
|
||
{
|
||
flags ^= CPP_N_DEFAULT;
|
||
flags |= CPP_N_MEDIUM;
|
||
|
||
if (((flags & CPP_N_HEX) == 0) && ((flags & CPP_N_IMAGINARY) == 0))
|
||
{
|
||
warning (OPT_Wunsuffixed_float_constants,
|
||
"unsuffixed float constant");
|
||
if (float_const_decimal64_p ())
|
||
flags |= CPP_N_DFLOAT;
|
||
}
|
||
}
|
||
|
||
/* Decode _Fract and _Accum. */
|
||
if (flags & CPP_N_FRACT || flags & CPP_N_ACCUM)
|
||
return interpret_fixed (token, flags);
|
||
|
||
/* Decode type based on width and properties. */
|
||
if (flags & CPP_N_DFLOAT)
|
||
if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
|
||
type = dfloat128_type_node;
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
|
||
type = dfloat32_type_node;
|
||
else
|
||
type = dfloat64_type_node;
|
||
else
|
||
if (flags & CPP_N_WIDTH_MD)
|
||
{
|
||
char suffix;
|
||
enum machine_mode mode;
|
||
|
||
if ((flags & CPP_N_WIDTH_MD) == CPP_N_MD_W)
|
||
suffix = 'w';
|
||
else
|
||
suffix = 'q';
|
||
|
||
mode = targetm.c.mode_for_suffix (suffix);
|
||
if (mode == VOIDmode)
|
||
{
|
||
error ("unsupported non-standard suffix on floating constant");
|
||
errorcount++;
|
||
|
||
return error_mark_node;
|
||
}
|
||
else
|
||
pedwarn (input_location, OPT_pedantic, "non-standard suffix on floating constant");
|
||
|
||
type = c_common_type_for_mode (mode, 0);
|
||
gcc_assert (type);
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
|
||
type = long_double_type_node;
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL
|
||
|| flag_single_precision_constant)
|
||
type = float_type_node;
|
||
else
|
||
type = double_type_node;
|
||
|
||
const_type = excess_precision_type (type);
|
||
if (!const_type)
|
||
const_type = type;
|
||
|
||
/* Copy the constant to a nul-terminated buffer. If the constant
|
||
has any suffixes, cut them off; REAL_VALUE_ATOF/ REAL_VALUE_HTOF
|
||
can't handle them. */
|
||
copylen = token->val.str.len;
|
||
if (flags & CPP_N_DFLOAT)
|
||
copylen -= 2;
|
||
else
|
||
{
|
||
if ((flags & CPP_N_WIDTH) != CPP_N_MEDIUM)
|
||
/* Must be an F or L or machine defined suffix. */
|
||
copylen--;
|
||
if (flags & CPP_N_IMAGINARY)
|
||
/* I or J suffix. */
|
||
copylen--;
|
||
}
|
||
|
||
copy = (char *) alloca (copylen + 1);
|
||
memcpy (copy, token->val.str.text, copylen);
|
||
copy[copylen] = '\0';
|
||
|
||
real_from_string3 (&real, copy, TYPE_MODE (const_type));
|
||
if (const_type != type)
|
||
/* Diagnosing if the result of converting the value with excess
|
||
precision to the semantic type would overflow (with associated
|
||
double rounding) is more appropriate than diagnosing if the
|
||
result of converting the string directly to the semantic type
|
||
would overflow. */
|
||
real_convert (&real_trunc, TYPE_MODE (type), &real);
|
||
|
||
/* Both C and C++ require a diagnostic for a floating constant
|
||
outside the range of representable values of its type. Since we
|
||
have __builtin_inf* to produce an infinity, this is now a
|
||
mandatory pedwarn if the target does not support infinities. */
|
||
if (REAL_VALUE_ISINF (real)
|
||
|| (const_type != type && REAL_VALUE_ISINF (real_trunc)))
|
||
{
|
||
if (!MODE_HAS_INFINITIES (TYPE_MODE (type)))
|
||
pedwarn (input_location, 0, "floating constant exceeds range of %qT", type);
|
||
else
|
||
warning (OPT_Woverflow, "floating constant exceeds range of %qT", type);
|
||
}
|
||
/* We also give a warning if the value underflows. */
|
||
else if (REAL_VALUES_EQUAL (real, dconst0)
|
||
|| (const_type != type && REAL_VALUES_EQUAL (real_trunc, dconst0)))
|
||
{
|
||
REAL_VALUE_TYPE realvoidmode;
|
||
int overflow = real_from_string (&realvoidmode, copy);
|
||
if (overflow < 0 || !REAL_VALUES_EQUAL (realvoidmode, dconst0))
|
||
warning (OPT_Woverflow, "floating constant truncated to zero");
|
||
}
|
||
|
||
/* Create a node with determined type and value. */
|
||
value = build_real (const_type, real);
|
||
if (flags & CPP_N_IMAGINARY)
|
||
value = build_complex (NULL_TREE, convert (const_type, integer_zero_node),
|
||
value);
|
||
|
||
if (type != const_type)
|
||
value = build1 (EXCESS_PRECISION_EXPR, type, value);
|
||
|
||
return value;
|
||
}
|
||
|
||
/* Interpret TOKEN, a fixed-point number with FLAGS as classified
|
||
by cpplib. */
|
||
|
||
static tree
|
||
interpret_fixed (const cpp_token *token, unsigned int flags)
|
||
{
|
||
tree type;
|
||
tree value;
|
||
FIXED_VALUE_TYPE fixed;
|
||
char *copy;
|
||
size_t copylen;
|
||
|
||
copylen = token->val.str.len;
|
||
|
||
if (flags & CPP_N_FRACT) /* _Fract. */
|
||
{
|
||
if (flags & CPP_N_UNSIGNED) /* Unsigned _Fract. */
|
||
{
|
||
if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
|
||
{
|
||
type = unsigned_long_long_fract_type_node;
|
||
copylen -= 4;
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM)
|
||
{
|
||
type = unsigned_long_fract_type_node;
|
||
copylen -= 3;
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
|
||
{
|
||
type = unsigned_short_fract_type_node;
|
||
copylen -= 3;
|
||
}
|
||
else
|
||
{
|
||
type = unsigned_fract_type_node;
|
||
copylen -= 2;
|
||
}
|
||
}
|
||
else /* Signed _Fract. */
|
||
{
|
||
if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
|
||
{
|
||
type = long_long_fract_type_node;
|
||
copylen -= 3;
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM)
|
||
{
|
||
type = long_fract_type_node;
|
||
copylen -= 2;
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
|
||
{
|
||
type = short_fract_type_node;
|
||
copylen -= 2;
|
||
}
|
||
else
|
||
{
|
||
type = fract_type_node;
|
||
copylen --;
|
||
}
|
||
}
|
||
}
|
||
else /* _Accum. */
|
||
{
|
||
if (flags & CPP_N_UNSIGNED) /* Unsigned _Accum. */
|
||
{
|
||
if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
|
||
{
|
||
type = unsigned_long_long_accum_type_node;
|
||
copylen -= 4;
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM)
|
||
{
|
||
type = unsigned_long_accum_type_node;
|
||
copylen -= 3;
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
|
||
{
|
||
type = unsigned_short_accum_type_node;
|
||
copylen -= 3;
|
||
}
|
||
else
|
||
{
|
||
type = unsigned_accum_type_node;
|
||
copylen -= 2;
|
||
}
|
||
}
|
||
else /* Signed _Accum. */
|
||
{
|
||
if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
|
||
{
|
||
type = long_long_accum_type_node;
|
||
copylen -= 3;
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_MEDIUM)
|
||
{
|
||
type = long_accum_type_node;
|
||
copylen -= 2;
|
||
}
|
||
else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
|
||
{
|
||
type = short_accum_type_node;
|
||
copylen -= 2;
|
||
}
|
||
else
|
||
{
|
||
type = accum_type_node;
|
||
copylen --;
|
||
}
|
||
}
|
||
}
|
||
|
||
copy = (char *) alloca (copylen + 1);
|
||
memcpy (copy, token->val.str.text, copylen);
|
||
copy[copylen] = '\0';
|
||
|
||
fixed_from_string (&fixed, copy, TYPE_MODE (type));
|
||
|
||
/* Create a node with determined type and value. */
|
||
value = build_fixed (type, fixed);
|
||
|
||
return value;
|
||
}
|
||
|
||
/* Convert a series of STRING, WSTRING, STRING16, STRING32 and/or
|
||
UTF8STRING tokens into a tree, performing string constant
|
||
concatenation. TOK is the first of these. VALP is the location
|
||
to write the string into. OBJC_STRING indicates whether an '@' token
|
||
preceded the incoming token.
|
||
Returns the CPP token type of the result (CPP_STRING, CPP_WSTRING,
|
||
CPP_STRING32, CPP_STRING16, CPP_UTF8STRING, or CPP_OBJC_STRING).
|
||
|
||
This is unfortunately more work than it should be. If any of the
|
||
strings in the series has an L prefix, the result is a wide string
|
||
(6.4.5p4). Whether or not the result is a wide string affects the
|
||
meaning of octal and hexadecimal escapes (6.4.4.4p6,9). But escape
|
||
sequences do not continue across the boundary between two strings in
|
||
a series (6.4.5p7), so we must not lose the boundaries. Therefore
|
||
cpp_interpret_string takes a vector of cpp_string structures, which
|
||
we must arrange to provide. */
|
||
|
||
static enum cpp_ttype
|
||
lex_string (const cpp_token *tok, tree *valp, bool objc_string, bool translate)
|
||
{
|
||
tree value;
|
||
size_t concats = 0;
|
||
struct obstack str_ob;
|
||
cpp_string istr;
|
||
enum cpp_ttype type = tok->type;
|
||
|
||
/* Try to avoid the overhead of creating and destroying an obstack
|
||
for the common case of just one string. */
|
||
cpp_string str = tok->val.str;
|
||
cpp_string *strs = &str;
|
||
|
||
retry:
|
||
tok = cpp_get_token (parse_in);
|
||
switch (tok->type)
|
||
{
|
||
case CPP_PADDING:
|
||
goto retry;
|
||
case CPP_ATSIGN:
|
||
if (c_dialect_objc ())
|
||
{
|
||
objc_string = true;
|
||
goto retry;
|
||
}
|
||
/* FALLTHROUGH */
|
||
|
||
default:
|
||
break;
|
||
|
||
case CPP_WSTRING:
|
||
case CPP_STRING16:
|
||
case CPP_STRING32:
|
||
case CPP_UTF8STRING:
|
||
if (type != tok->type)
|
||
{
|
||
if (type == CPP_STRING)
|
||
type = tok->type;
|
||
else
|
||
error ("unsupported non-standard concatenation of string literals");
|
||
}
|
||
|
||
case CPP_STRING:
|
||
if (!concats)
|
||
{
|
||
gcc_obstack_init (&str_ob);
|
||
obstack_grow (&str_ob, &str, sizeof (cpp_string));
|
||
}
|
||
|
||
concats++;
|
||
obstack_grow (&str_ob, &tok->val.str, sizeof (cpp_string));
|
||
goto retry;
|
||
}
|
||
|
||
/* We have read one more token than we want. */
|
||
_cpp_backup_tokens (parse_in, 1);
|
||
if (concats)
|
||
strs = XOBFINISH (&str_ob, cpp_string *);
|
||
|
||
if (concats && !objc_string && !in_system_header)
|
||
warning (OPT_Wtraditional,
|
||
"traditional C rejects string constant concatenation");
|
||
|
||
if ((translate
|
||
? cpp_interpret_string : cpp_interpret_string_notranslate)
|
||
(parse_in, strs, concats + 1, &istr, type))
|
||
{
|
||
value = build_string (istr.len, (const char *) istr.text);
|
||
free (CONST_CAST (unsigned char *, istr.text));
|
||
}
|
||
else
|
||
{
|
||
/* Callers cannot generally handle error_mark_node in this context,
|
||
so return the empty string instead. cpp_interpret_string has
|
||
issued an error. */
|
||
switch (type)
|
||
{
|
||
default:
|
||
case CPP_STRING:
|
||
case CPP_UTF8STRING:
|
||
value = build_string (1, "");
|
||
break;
|
||
case CPP_STRING16:
|
||
value = build_string (TYPE_PRECISION (char16_type_node)
|
||
/ TYPE_PRECISION (char_type_node),
|
||
"\0"); /* char16_t is 16 bits */
|
||
break;
|
||
case CPP_STRING32:
|
||
value = build_string (TYPE_PRECISION (char32_type_node)
|
||
/ TYPE_PRECISION (char_type_node),
|
||
"\0\0\0"); /* char32_t is 32 bits */
|
||
break;
|
||
case CPP_WSTRING:
|
||
value = build_string (TYPE_PRECISION (wchar_type_node)
|
||
/ TYPE_PRECISION (char_type_node),
|
||
"\0\0\0"); /* widest supported wchar_t
|
||
is 32 bits */
|
||
break;
|
||
}
|
||
}
|
||
|
||
switch (type)
|
||
{
|
||
default:
|
||
case CPP_STRING:
|
||
case CPP_UTF8STRING:
|
||
TREE_TYPE (value) = char_array_type_node;
|
||
break;
|
||
case CPP_STRING16:
|
||
TREE_TYPE (value) = char16_array_type_node;
|
||
break;
|
||
case CPP_STRING32:
|
||
TREE_TYPE (value) = char32_array_type_node;
|
||
break;
|
||
case CPP_WSTRING:
|
||
TREE_TYPE (value) = wchar_array_type_node;
|
||
}
|
||
*valp = fix_string_type (value);
|
||
|
||
if (concats)
|
||
obstack_free (&str_ob, 0);
|
||
|
||
return objc_string ? CPP_OBJC_STRING : type;
|
||
}
|
||
|
||
/* Converts a (possibly wide) character constant token into a tree. */
|
||
static tree
|
||
lex_charconst (const cpp_token *token)
|
||
{
|
||
cppchar_t result;
|
||
tree type, value;
|
||
unsigned int chars_seen;
|
||
int unsignedp = 0;
|
||
|
||
result = cpp_interpret_charconst (parse_in, token,
|
||
&chars_seen, &unsignedp);
|
||
|
||
if (token->type == CPP_WCHAR)
|
||
type = wchar_type_node;
|
||
else if (token->type == CPP_CHAR32)
|
||
type = char32_type_node;
|
||
else if (token->type == CPP_CHAR16)
|
||
type = char16_type_node;
|
||
/* In C, a character constant has type 'int'.
|
||
In C++ 'char', but multi-char charconsts have type 'int'. */
|
||
else if (!c_dialect_cxx () || chars_seen > 1)
|
||
type = integer_type_node;
|
||
else
|
||
type = char_type_node;
|
||
|
||
/* Cast to cppchar_signed_t to get correct sign-extension of RESULT
|
||
before possibly widening to HOST_WIDE_INT for build_int_cst. */
|
||
if (unsignedp || (cppchar_signed_t) result >= 0)
|
||
value = build_int_cst_wide (type, result, 0);
|
||
else
|
||
value = build_int_cst_wide (type, (cppchar_signed_t) result, -1);
|
||
|
||
return value;
|
||
}
|