#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"
static int header_time, body_time;
static splay_tree file_info_tree;
int pending_lang_change;
int c_header_level;
int c_lex_string_translate = 1;
bool c_lex_return_raw_strings = false;
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
(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);
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;
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;
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)
{
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)
{
cpp_string cstr = { 0, 0 };
if (cpp_interpret_string (pfile, str, 1, &cstr, false))
{
ASM_OUTPUT_IDENT (asm_out_file, (const char *) cstr.text);
free ((void *) cstr.text);
}
}
#endif
}
static void
cb_line_change (cpp_reader * ARG_UNUSED (pfile), const cpp_token *token,
int parsing_args)
{
if (token->type != CPP_EOF && !parsing_args)
#ifdef USE_MAPPED_LOCATION
input_location = token->src_loc;
#else
{
source_location loc = token->src_loc;
const struct line_map *map = linemap_lookup (&line_table, loc);
input_line = SOURCE_LINE (map, loc);
}
#endif
}
void
fe_file_change (const struct line_map *new_map)
{
if (new_map == NULL)
return;
if (new_map->reason == LC_ENTER)
{
if (!MAIN_FILE_P (new_map))
{
#ifdef USE_MAPPED_LOCATION
int included_at = LAST_SOURCE_LINE_LOCATION (new_map - 1);
input_location = included_at;
push_srcloc (new_map->start_location);
#else
int included_at = LAST_SOURCE_LINE (new_map - 1);
input_line = included_at;
push_srcloc (new_map->to_file, 1);
#endif
(*debug_hooks->start_source_file) (included_at, 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
pop_srcloc ();
(*debug_hooks->end_source_file) (new_map->to_line);
}
update_header_times (new_map->to_file);
in_system_header = new_map->sysp != 0;
#ifdef USE_MAPPED_LOCATION
input_location = new_map->start_location;
#else
input_filename = new_map->to_file;
input_line = new_map->to_line;
#endif
}
static void
cb_def_pragma (cpp_reader *pfile, source_location loc)
{
if (warn_unknown_pragmas > in_system_header)
{
const unsigned char *space, *name;
const cpp_token *s;
#ifndef USE_MAPPED_LOCATION
location_t fe_loc;
const struct line_map *map = linemap_lookup (&line_table, loc);
fe_loc.file = map->to_file;
fe_loc.line = SOURCE_LINE (map, loc);
#else
location_t fe_loc = loc;
#endif
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 (OPT_Wunknown_pragmas, "%Hignoring #pragma %s %s",
&fe_loc, space, name);
}
}
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));
}
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));
}
enum cpp_ttype
c_lex_with_flags (tree *value, location_t *loc, unsigned char *cpp_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 (parse_in);
type = tok->type;
retry_after_at:
#ifdef USE_MAPPED_LOCATION
*loc = tok->src_loc;
#else
*loc = input_location;
#endif
switch (type)
{
case CPP_PADDING:
goto retry;
case CPP_NAME:
*value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
break;
case CPP_NUMBER:
{
unsigned int flags = cpp_classify_number (parse_in, tok);
switch (flags & CPP_N_CATEGORY)
{
case CPP_N_INVALID:
*value = error_mark_node;
errorcount++;
break;
case CPP_N_INTEGER:
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:
if (c_dialect_objc ())
{
location_t atloc = input_location;
retry_at:
tok = cpp_get_token (parse_in);
type = tok->type;
switch (type)
{
case CPP_PADDING:
goto retry_at;
case CPP_STRING:
case CPP_WSTRING:
type = lex_string (tok, value, true);
break;
case CPP_NAME:
*value = HT_IDENT_TO_GCC_IDENT (HT_NODE (tok->val.node));
if (objc_is_reserved_word (*value))
{
type = CPP_AT_NAME;
break;
}
default:
error ("%Hstray %<@%> in program", &atloc);
goto retry_after_at;
}
break;
}
case CPP_HASH:
case CPP_PASTE:
{
unsigned char name[4];
*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:
*value = lex_charconst (tok);
break;
case CPP_STRING:
case CPP_WSTRING:
if (!c_lex_return_raw_strings)
{
type = lex_string (tok, value, false);
break;
}
*value = build_string (tok->val.str.len, (char *) tok->val.str.text);
break;
case CPP_PRAGMA:
*value = build_int_cst (NULL, tok->val.pragma);
break;
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;
}
static enum integer_type_kind
narrowest_unsigned_type (unsigned HOST_WIDE_INT low,
unsigned HOST_WIDE_INT high,
unsigned int flags)
{
enum integer_type_kind 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 )
{
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 itk;
}
return itk_none;
}
static enum integer_type_kind
narrowest_signed_type (unsigned HOST_WIDE_INT low,
unsigned HOST_WIDE_INT high, unsigned int flags)
{
enum integer_type_kind 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 )
{
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 itk;
}
return itk_none;
}
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);
if (flags & CPP_N_UNSIGNED)
itk = narrowest_unsigned_type (integer.low, integer.high, flags);
else
{
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);
if ((flags & CPP_N_RADIX) != CPP_N_DECIMAL)
itk = MIN (itk_u, itk_s);
else
{
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)
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
&& !in_system_header && !flag_isoc99)
pedwarn ("integer constant is too large for %qs type",
(flags & CPP_N_UNSIGNED) ? "unsigned long" : "long");
value = build_int_cst_wide (type, integer.low, integer.high);
if (flags & CPP_N_IMAGINARY)
value = build_complex (NULL_TREE, build_int_cst (type, 0), value);
return value;
}
static tree
interpret_float (const cpp_token *token, unsigned int flags)
{
tree type;
tree value;
REAL_VALUE_TYPE real;
char *copy;
size_t copylen;
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) == 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;
copylen = token->val.str.len;
if (flags & CPP_N_DFLOAT)
copylen -= 2;
else
{
if ((flags & CPP_N_WIDTH) != CPP_N_MEDIUM)
copylen--;
if (flags & CPP_N_IMAGINARY)
copylen--;
}
copy = (char *) alloca (copylen + 1);
memcpy (copy, token->val.str.text, copylen);
copy[copylen] = '\0';
real_from_string3 (&real, copy, TYPE_MODE (type));
if (REAL_VALUE_ISINF (real) && pedantic)
pedwarn ("floating constant exceeds range of %qT", type);
value = build_real (type, real);
if (flags & CPP_N_IMAGINARY)
value = build_complex (NULL_TREE, convert (type, integer_zero_node), value);
return value;
}
static enum cpp_ttype
lex_string (const cpp_token *tok, tree *valp, bool objc_string)
{
tree value;
bool wide = false;
size_t concats = 0;
struct obstack str_ob;
cpp_string istr;
cpp_string str = tok->val.str;
cpp_string *strs = &str;
if (tok->type == CPP_WSTRING)
wide = true;
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;
}
default:
break;
case CPP_WSTRING:
wide = true;
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;
}
_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 ((c_lex_string_translate
? cpp_interpret_string : cpp_interpret_string_notranslate)
(parse_in, strs, concats + 1, &istr, wide))
{
value = build_string (istr.len, (char *) istr.text);
free ((void *) istr.text);
if (c_lex_string_translate == -1)
{
int xlated = cpp_interpret_string_notranslate (parse_in, strs,
concats + 1,
&istr, wide);
gcc_assert (xlated);
if (TREE_STRING_LENGTH (value) != (int) istr.len
|| 0 != strncmp (TREE_STRING_POINTER (value), (char *) istr.text,
istr.len))
{
*valp = build_string (istr.len, (char *) istr.text);
valp = &TREE_CHAIN (*valp);
}
free ((void *) istr.text);
}
}
else
{
if (wide)
value = build_string (TYPE_PRECISION (wchar_type_node)
/ TYPE_PRECISION (char_type_node),
"\0\0\0");
else
value = build_string (1, "");
}
TREE_TYPE (value) = wide ? wchar_array_type_node : char_array_type_node;
*valp = fix_string_type (value);
if (concats)
obstack_free (&str_ob, 0);
return objc_string ? CPP_OBJC_STRING : wide ? CPP_WSTRING : CPP_STRING;
}
static tree
lex_charconst (const cpp_token *token)
{
cppchar_t result;
tree type, value;
unsigned int chars_seen;
int unsignedp;
result = cpp_interpret_charconst (parse_in, token,
&chars_seen, &unsignedp);
if (token->type == CPP_WCHAR)
type = wchar_type_node;
else if (!c_dialect_cxx () || chars_seen > 1)
type = integer_type_node;
else
type = char_type_node;
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;
}