X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fc-lex.c;h=53a3b06a63b0ff613a491e39e37561f7daf31db2;hb=e54eaa4267a08c180ca7caa97e546dd252498f30;hp=f3cdd3cffb09925c2cb2252662e3bb1bb1c11d81;hpb=30eb963b5f1fe5bd52255805f736b96fd50193c4;p=pf3gnuchains%2Fgcc-fork.git
diff --git a/gcc/c-lex.c b/gcc/c-lex.c
index f3cdd3cffb0..53a3b06a63b 100644
--- a/gcc/c-lex.c
+++ b/gcc/c-lex.c
@@ -1,12 +1,13 @@
/* 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 Free Software Foundation, Inc.
+ 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 2, or (at your option) any later
+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
@@ -15,9 +16,8 @@ FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+. */
#include "config.h"
#include "system.h"
@@ -25,9 +25,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#include "tm.h"
#include "real.h"
-#include "rtl.h"
+#include "fixed-value.h"
#include "tree.h"
-#include "expr.h"
#include "input.h"
#include "output.h"
#include "c-tree.h"
@@ -38,38 +37,29 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#include "c-pragma.h"
#include "toplev.h"
#include "intl.h"
-#include "tm_p.h"
#include "splay-tree.h"
#include "debug.h"
-
-/* The current line map. */
-static const struct line_map *map;
+#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;
-#undef WCHAR_TYPE_SIZE
-#define WCHAR_TYPE_SIZE TYPE_PRECISION (wchar_type_node)
-
-/* Number of bytes in a wide character. */
-#define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT)
-
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 enum integer_type_kind
- narrowest_unsigned_type (tree, unsigned int);
-static enum integer_type_kind
- narrowest_signed_type (tree, unsigned int);
-static enum cpp_ttype lex_string (const cpp_token *, tree *, bool);
+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_dir_change (cpp_reader *, const char *);
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 *);
@@ -81,10 +71,8 @@ init_c_lex (void)
struct cpp_callbacks *cb;
struct c_fileinfo *toplevel;
- /* Set up filename timing. Must happen before cpp_read_main_file. */
- file_info_tree = splay_tree_new ((splay_tree_compare_fn)strcmp,
- 0,
- (splay_tree_delete_value_fn)free);
+ /* The get_fileinfo data structure must be initialized before
+ cpp_read_main_file is called. */
toplevel = get_fileinfo ("");
if (flag_detailed_statistics)
{
@@ -96,7 +84,6 @@ init_c_lex (void)
cb = cpp_get_callbacks (parse_in);
cb->line_change = cb_line_change;
- cb->dir_change = cb_dir_change;
cb->ident = cb_ident;
cb->def_pragma = cb_def_pragma;
cb->valid_pch = c_common_valid_pch;
@@ -104,8 +91,8 @@ init_c_lex (void)
/* Set the debug callbacks if we can use them. */
if (debug_info_level == DINFO_LEVEL_VERBOSE
- && (write_symbols == DWARF_DEBUG || write_symbols == DWARF2_DEBUG
- || write_symbols == VMS_AND_DWARF2_DEBUG))
+ && (write_symbols == DWARF2_DEBUG
+ || write_symbols == VMS_AND_DWARF2_DEBUG))
{
cb->define = cb_define;
cb->undef = cb_undef;
@@ -118,11 +105,16 @@ 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 = xmalloc (sizeof (struct c_fileinfo));
+ fi = XNEW (struct c_fileinfo);
fi->time = 0;
fi->interface_only = 0;
fi->interface_unknown = 1;
@@ -147,7 +139,7 @@ update_header_times (const char *name)
}
static int
-dump_one_header (splay_tree_node n, void *dummy ATTRIBUTE_UNUSED)
+dump_one_header (splay_tree_node n, void * ARG_UNUSED (dummy))
{
print_time ((const char *) n->key,
((struct c_fileinfo *) n->value)->time);
@@ -165,26 +157,26 @@ dump_time_statistics (void)
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));
+ (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 *pfile ATTRIBUTE_UNUSED,
- unsigned int line ATTRIBUTE_UNUSED,
- const cpp_string *str ATTRIBUTE_UNUSED)
+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)
+ if (!flag_no_ident)
{
/* Convert escapes in the string. */
cpp_string cstr = { 0, 0 };
- if (cpp_interpret_string (pfile, str, 1, &cstr, false))
+ if (cpp_interpret_string (pfile, str, 1, &cstr, CPP_STRING))
{
ASM_OUTPUT_IDENT (asm_out_file, (const char *) cstr.text);
- free ((void *)cstr.text);
+ free (CONST_CAST (unsigned char *, cstr.text));
}
}
#endif
@@ -193,38 +185,32 @@ cb_ident (cpp_reader *pfile ATTRIBUTE_UNUSED,
/* 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 *pfile ATTRIBUTE_UNUSED, const cpp_token *token,
+cb_line_change (cpp_reader * ARG_UNUSED (pfile), const cpp_token *token,
int parsing_args)
{
- if (token->type == CPP_EOF || parsing_args)
- return;
-
- input_line = SOURCE_LINE (map, token->line);
-}
-
-static void
-cb_dir_change (cpp_reader *pfile ATTRIBUTE_UNUSED, const char *dir)
-{
- if (! set_src_pwd (dir))
- warning ("too late for # directive to set debug directory");
+ 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 (map == NULL)
- main_input_filename = new_map->to_file;
- else
+ if (!MAIN_FILE_P (new_map))
{
- int included_at = SOURCE_LINE (new_map - 1, new_map->from_line - 1);
+ 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_line = included_at;
- push_srcloc (new_map->to_file, 1);
- (*debug_hooks->start_source_file) (included_at, new_map->to_file);
+ 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;
@@ -242,27 +228,21 @@ fe_file_change (const struct line_map *new_map)
if (c_header_level && --c_header_level == 0)
{
if (new_map->sysp == 2)
- warning ("badly nested C headers from preprocessor");
+ warning (0, "badly nested C headers from preprocessor");
--pending_lang_change;
}
#endif
- pop_srcloc ();
+ input_location = new_map->start_location;
(*debug_hooks->end_source_file) (new_map->to_line);
}
update_header_times (new_map->to_file);
- in_system_header = new_map->sysp != 0;
- input_filename = new_map->to_file;
- input_line = new_map->to_line;
- map = new_map;
-
- /* Hook for C++. */
- extract_interface_info ();
+ input_location = new_map->start_location;
}
static void
-cb_def_pragma (cpp_reader *pfile, unsigned int line)
+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
@@ -271,6 +251,7 @@ cb_def_pragma (cpp_reader *pfile, unsigned int line)
{
const unsigned char *space, *name;
const cpp_token *s;
+ location_t fe_loc = loc;
space = name = (const unsigned char *) "";
s = cpp_get_token (pfile);
@@ -282,56 +263,56 @@ cb_def_pragma (cpp_reader *pfile, unsigned int line)
name = cpp_token_as_text (pfile, s);
}
- input_line = SOURCE_LINE (map, line);
- warning ("ignoring #pragma %s %s", space, name);
+ 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, unsigned int line, cpp_hashnode *node)
+cb_define (cpp_reader *pfile, source_location loc, cpp_hashnode *node)
{
- (*debug_hooks->define) (SOURCE_LINE (map, line),
+ 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 *pfile ATTRIBUTE_UNUSED, unsigned int line,
+cb_undef (cpp_reader * ARG_UNUSED (pfile), source_location loc,
cpp_hashnode *node)
{
- (*debug_hooks->undef) (SOURCE_LINE (map, line),
+ const struct line_map *map = linemap_lookup (line_table, loc);
+ (*debug_hooks->undef) (SOURCE_LINE (map, loc),
(const char *) NODE_NAME (node));
}
-static inline const cpp_token *
-get_nonpadding_token (void)
-{
- const cpp_token *tok;
- timevar_push (TV_CPP);
- do
- tok = cpp_get_token (parse_in);
- while (tok->type == CPP_PADDING);
- timevar_pop (TV_CPP);
-
- return tok;
-}
+/* 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. */
-int
-c_lex (tree *value)
+enum cpp_ttype
+c_lex_with_flags (tree *value, location_t *loc, unsigned char *cpp_flags,
+ int lex_flags)
{
- const cpp_token *tok;
- location_t atloc;
static bool no_more_pch;
+ const cpp_token *tok;
+ enum cpp_ttype type;
+ unsigned char add_flags = 0;
+ timevar_push (TV_CPP);
retry:
- tok = get_nonpadding_token ();
+ tok = cpp_get_token_with_location (parse_in, loc);
+ type = tok->type;
retry_after_at:
- switch (tok->type)
+ switch (type)
{
+ case CPP_PADDING:
+ goto retry;
+
case CPP_NAME:
- *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
+ *value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node.node));
break;
case CPP_NUMBER:
@@ -343,9 +324,14 @@ c_lex (tree *value)
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;
@@ -354,41 +340,64 @@ c_lex (tree *value)
break;
default:
- abort ();
+ gcc_unreachable ();
}
}
break;
case CPP_ATSIGN:
/* An @ may give the next token special significance in Objective-C. */
- atloc = input_location;
- tok = get_nonpadding_token ();
if (c_dialect_objc ())
{
- tree val;
- switch (tok->type)
+ 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_NAME:
- val = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
- if (C_IS_RESERVED_WORD (val)
- && OBJC_IS_AT_KEYWORD (C_RID_CODE (val)))
- {
- *value = val;
- return CPP_AT_NAME;
- }
- break;
+ case CPP_PADDING:
+ goto retry_at;
case CPP_STRING:
case CPP_WSTRING:
- return lex_string (tok, value, true);
+ 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: break;
+ default:
+ /* ... or not. */
+ error_at (atloc, "stray %<@%> in program");
+ *loc = newloc;
+ goto retry_after_at;
}
+ break;
}
- /* ... or not. */
- error ("%Hstray '@' in program", &atloc);
- goto retry_after_at;
+ /* 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:
{
@@ -397,49 +406,72 @@ c_lex (tree *value)
if (c == '"' || c == '\'')
error ("missing terminating %c character", (int) c);
else if (ISGRAPH (c))
- error ("stray '%c' in program", (int) c);
+ error ("stray %qc in program", (int) c);
else
- error ("stray '\\%o' in program", (int) c);
+ 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:
- return lex_string (tok, value, false);
+ 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:
- abort ();
+ gcc_unreachable ();
default:
*value = NULL_TREE;
break;
}
- if (! no_more_pch)
+ if (cpp_flags)
+ *cpp_flags = tok->flags | add_flags;
+
+ if (!no_more_pch)
{
no_more_pch = true;
c_common_no_more_pch ();
}
- return tok->type;
+ timevar_pop (TV_CPP);
+
+ return type;
}
/* Returns the narrowest C-visible unsigned type, starting with the
- minimum specified by FLAGS, that can fit VALUE, or itk_none if
+ 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 (tree value, unsigned int flags)
+narrowest_unsigned_type (unsigned HOST_WIDE_INT low,
+ unsigned HOST_WIDE_INT high,
+ unsigned int flags)
{
- enum integer_type_kind itk;
+ int itk;
if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
itk = itk_unsigned_int;
@@ -448,22 +480,25 @@ narrowest_unsigned_type (tree value, unsigned int flags)
else
itk = itk_unsigned_long_long;
- /* int_fits_type_p must think the type of its first argument is
- wider than its second argument, or it won't do the proper check. */
- TREE_TYPE (value) = widest_unsigned_literal_type_node;
-
for (; itk < itk_none; itk += 2 /* skip unsigned types */)
- if (int_fits_type_p (value, integer_types[itk]))
- return itk;
+ {
+ 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 (tree value, unsigned int flags)
+narrowest_signed_type (unsigned HOST_WIDE_INT low,
+ unsigned HOST_WIDE_INT high, unsigned int flags)
{
- enum integer_type_kind itk;
+ int itk;
if ((flags & CPP_N_WIDTH) == CPP_N_SMALL)
itk = itk_int;
@@ -472,13 +507,16 @@ narrowest_signed_type (tree value, unsigned int flags)
else
itk = itk_long_long;
- /* int_fits_type_p must think the type of its first argument is
- wider than its second argument, or it won't do the proper check. */
- TREE_TYPE (value) = widest_unsigned_literal_type_node;
for (; itk < itk_none; itk += 2 /* skip signed types */)
- if (int_fits_type_p (value, integer_types[itk]))
- return itk;
+ {
+ 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;
}
@@ -494,18 +532,19 @@ interpret_integer (const cpp_token *token, unsigned int flags)
integer = cpp_interpret_integer (parse_in, token, flags);
integer = cpp_num_sign_extend (integer, options->precision);
- value = build_int_2_wide (integer.low, integer.high);
/* The type of a constant with a U suffix is straightforward. */
if (flags & CPP_N_UNSIGNED)
- itk = narrowest_unsigned_type (value, flags);
+ 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 (value, flags);
- enum integer_type_kind itk_s = narrowest_signed_type (value, flags);
+ 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
@@ -529,10 +568,11 @@ interpret_integer (const cpp_token *token, unsigned int flags)
if (itk_u < itk_unsigned_long)
itk_u = itk_unsigned_long;
itk = itk_u;
- warning ("this decimal constant is unsigned only in ISO C90");
+ warning (0, "this decimal constant is unsigned only in ISO C90");
}
- else if (warn_traditional)
- warning ("this decimal constant would be unsigned in ISO C90");
+ else
+ warning (OPT_Wtraditional,
+ "this decimal constant would be unsigned in ISO C90");
}
}
}
@@ -543,19 +583,24 @@ interpret_integer (const cpp_token *token, unsigned int flags)
? 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
- && ! in_system_header && ! flag_isoc99)
- pedwarn ("integer constant is too large for \"%s\" type",
- (flags & CPP_N_UNSIGNED) ? "unsigned long" : "long");
+ {
+ 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 % type"
+ : "integer constant is too large for % type");
+ }
- TREE_TYPE (value) = 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, convert (type, integer_zero_node), value);
+ value = build_complex (NULL_TREE, build_int_cst (type, 0), value);
return value;
}
@@ -566,70 +611,274 @@ 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;
- const char *typename;
- /* FIXME: make %T work in error/warning, then we don't need typename. */
- if ((flags & CPP_N_WIDTH) == CPP_N_LARGE)
+ /* 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)
{
- type = long_double_type_node;
- typename = "long double";
- }
- else if ((flags & CPP_N_WIDTH) == CPP_N_SMALL
- || flag_single_precision_constant)
- {
- type = float_type_node;
- typename = "float";
+ 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;
- typename = "double";
- }
+
+ 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_WIDTH) != CPP_N_MEDIUM)
- /* Must be an F or L suffix. */
- copylen--;
- if (flags & CPP_N_IMAGINARY)
- /* I or J suffix. */
- copylen--;
+ 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 = alloca (copylen + 1);
+ copy = (char *) alloca (copylen + 1);
memcpy (copy, token->val.str.text, copylen);
copy[copylen] = '\0';
- real_from_string (&real, copy);
- real_convert (&real, TYPE_MODE (type), &real);
-
- /* A diagnostic is required for "soft" overflow by some ISO C
- testsuites. This is not pedwarn, because some people don't want
- an error for this.
- ??? That's a dubious reason... is this a mandatory diagnostic or
- isn't it? -- zw, 2001-08-21. */
- if (REAL_VALUE_ISINF (real) && pedantic)
- warning ("floating constant exceeds range of \"%s\"", typename);
+ 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 (type, real);
+ value = build_real (const_type, real);
if (flags & CPP_N_IMAGINARY)
- value = build_complex (NULL_TREE, convert (type, integer_zero_node), value);
+ 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 and/or WSTRING 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.
+/* 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,
- or CPP_OBJC_STRING).
+ 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
@@ -641,83 +890,129 @@ interpret_float (const cpp_token *token, unsigned int flags)
we must arrange to provide. */
static enum cpp_ttype
-lex_string (const cpp_token *tok, tree *valp, bool objc_string)
+lex_string (const cpp_token *tok, tree *valp, bool objc_string, bool translate)
{
tree value;
- bool wide = false;
- size_t count = 1;
+ 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;
- if (tok->type == CPP_WSTRING)
- wide = true;
-
- tok = get_nonpadding_token ();
- if (c_dialect_objc () && tok->type == CPP_ATSIGN)
- {
- objc_string = true;
- tok = get_nonpadding_token ();
- }
- if (tok->type == CPP_STRING || tok->type == CPP_WSTRING)
+ retry:
+ tok = cpp_get_token (parse_in);
+ switch (tok->type)
{
- gcc_obstack_init (&str_ob);
- obstack_grow (&str_ob, &str, sizeof (cpp_string));
+ case CPP_PADDING:
+ goto retry;
+ case CPP_ATSIGN:
+ if (c_dialect_objc ())
+ {
+ objc_string = true;
+ goto retry;
+ }
+ /* FALLTHROUGH */
+
+ default:
+ break;
- do
+ case CPP_WSTRING:
+ case CPP_STRING16:
+ case CPP_STRING32:
+ case CPP_UTF8STRING:
+ if (type != tok->type)
{
- count++;
- if (tok->type == CPP_WSTRING)
- wide = true;
- obstack_grow (&str_ob, &tok->val.str, sizeof (cpp_string));
-
- tok = get_nonpadding_token ();
- if (c_dialect_objc () && tok->type == CPP_ATSIGN)
- {
- objc_string = true;
- tok = get_nonpadding_token ();
- }
+ if (type == CPP_STRING)
+ type = tok->type;
+ else
+ error ("unsupported non-standard concatenation of string literals");
}
- while (tok->type == CPP_STRING || tok->type == CPP_WSTRING);
- strs = obstack_finish (&str_ob);
+
+ 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 (count > 1 && !objc_string && warn_traditional && !in_system_header)
- warning ("traditional C rejects string constant concatenation");
+ if (concats && !objc_string && !in_system_header)
+ warning (OPT_Wtraditional,
+ "traditional C rejects string constant concatenation");
- if (cpp_interpret_string (parse_in, strs, count, &istr, wide))
+ if ((translate
+ ? cpp_interpret_string : cpp_interpret_string_notranslate)
+ (parse_in, strs, concats + 1, &istr, type))
{
- value = build_string (istr.len, (char *)istr.text);
- free ((void *)istr.text);
+ 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. */
- if (wide)
- value = build_string (TYPE_PRECISION (wchar_type_node)
- / TYPE_PRECISION (char_type_node),
- "\0\0\0"); /* widest supported wchar_t
- is 32 bits */
- else
- value = build_string (1, "");
+ 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;
+ }
}
- TREE_TYPE (value) = wide ? wchar_array_type_node : char_array_type_node;
+ 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 (strs != &str)
+ if (concats)
obstack_free (&str_ob, 0);
- return objc_string ? CPP_OBJC_STRING : wide ? CPP_WSTRING : CPP_STRING;
+ return objc_string ? CPP_OBJC_STRING : type;
}
/* Converts a (possibly wide) character constant token into a tree. */
@@ -727,20 +1022,17 @@ lex_charconst (const cpp_token *token)
cppchar_t result;
tree type, value;
unsigned int chars_seen;
- int unsignedp;
+ int unsignedp = 0;
result = cpp_interpret_charconst (parse_in, token,
&chars_seen, &unsignedp);
- /* Cast to cppchar_signed_t to get correct sign-extension of RESULT
- before possibly widening to HOST_WIDE_INT for build_int_2. */
- if (unsignedp || (cppchar_signed_t) result >= 0)
- value = build_int_2 (result, 0);
- else
- value = build_int_2 ((cppchar_signed_t) result, -1);
-
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)
@@ -748,6 +1040,12 @@ lex_charconst (const cpp_token *token)
else
type = char_type_node;
- TREE_TYPE (value) = type;
+ /* 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;
}