1904 lines
47 KiB
C
Executable File
1904 lines
47 KiB
C
Executable File
/* Lexical analyzer for C and Objective C.
|
||
Copyright (C) 1987, 88, 89, 92, 94-97, 1998 Free Software Foundation, Inc.
|
||
|
||
This file is part of GNU CC.
|
||
|
||
GNU CC is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2, or (at your option)
|
||
any later version.
|
||
|
||
GNU CC 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 CC; see the file COPYING. If not, write to
|
||
the Free Software Foundation, 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
#include "config.h"
|
||
#include "system.h"
|
||
#include <setjmp.h>
|
||
|
||
#include "rtl.h"
|
||
#include "tree.h"
|
||
#include "input.h"
|
||
#include "output.h"
|
||
#include "c-lex.h"
|
||
#include "c-tree.h"
|
||
#include "flags.h"
|
||
#include "c-parse.h"
|
||
#include "toplev.h"
|
||
|
||
/* Stream for reading from the input file. */
|
||
FILE *finput;
|
||
|
||
extern void yyprint (FILE *, int, YYSTYPE);
|
||
|
||
/* The elements of `ridpointers' are identifier nodes
|
||
for the reserved type names and storage classes.
|
||
It is indexed by a RID_... value. */
|
||
tree ridpointers[(int) RID_MAX];
|
||
|
||
/* Cause the `yydebug' variable to be defined. */
|
||
#define YYDEBUG 1
|
||
|
||
#define GETC() getc(finput)
|
||
#define UNGETC(c) ungetc(c, finput)
|
||
|
||
/* the declaration found for the last IDENTIFIER token read in.
|
||
yylex must look this up to detect typedefs, which get token type TYPENAME,
|
||
so it is left around in case the identifier is not a typedef but is
|
||
used in a context which makes it a reference to a variable. */
|
||
tree lastiddecl;
|
||
|
||
extern int yydebug;
|
||
|
||
/* File used for outputting assembler code. */
|
||
extern FILE *asm_out_file;
|
||
|
||
#ifndef WCHAR_TYPE_SIZE
|
||
#ifdef INT_TYPE_SIZE
|
||
#define WCHAR_TYPE_SIZE INT_TYPE_SIZE
|
||
#else
|
||
#define WCHAR_TYPE_SIZE BITS_PER_WORD
|
||
#endif
|
||
#endif
|
||
|
||
/* Number of bytes in a wide character. */
|
||
#define WCHAR_BYTES (WCHAR_TYPE_SIZE / BITS_PER_UNIT)
|
||
|
||
static int maxtoken; /* Current nominal length of token buffer. */
|
||
char *token_buffer; /* Pointer to token buffer.
|
||
Actual allocated length is maxtoken + 2. */
|
||
|
||
static int indent_level = 0; /* Number of { minus number of }. */
|
||
|
||
/* Nonzero if end-of-file has been seen on input. */
|
||
static int end_of_file;
|
||
|
||
static int whitespace_cr (int);
|
||
static int skip_white_space (int);
|
||
static int skip_white_space_on_line (void);
|
||
static char *extend_token_buffer (char *);
|
||
static int readescape (int *);
|
||
|
||
/* Do not insert generated code into the source, instead, include it.
|
||
This allows us to build gcc automatically even for targets that
|
||
need to add or modify the reserved keyword lists. */
|
||
#include "c-gperf.h"
|
||
|
||
/* Return something to represent absolute declarators containing a *.
|
||
TARGET is the absolute declarator that the * contains.
|
||
TYPE_QUALS is a list of modifiers such as const or volatile
|
||
to apply to the pointer type, represented as identifiers.
|
||
|
||
We return an INDIRECT_REF whose "contents" are TARGET
|
||
and whose type is the modifier list. */
|
||
|
||
tree
|
||
make_pointer_declarator (type_quals, target)
|
||
tree type_quals, target;
|
||
{
|
||
return build1 (INDIRECT_REF, type_quals, target);
|
||
}
|
||
|
||
void
|
||
forget_protocol_qualifiers ()
|
||
{
|
||
int i, n = sizeof wordlist / sizeof (struct resword);
|
||
|
||
for (i = 0; i < n; i++)
|
||
if ((int) wordlist[i].rid >= (int) RID_IN
|
||
&& (int) wordlist[i].rid <= (int) RID_ONEWAY)
|
||
wordlist[i].name = "";
|
||
}
|
||
|
||
void
|
||
remember_protocol_qualifiers ()
|
||
{
|
||
int i, n = sizeof wordlist / sizeof (struct resword);
|
||
|
||
for (i = 0; i < n; i++)
|
||
if (wordlist[i].rid == RID_IN)
|
||
wordlist[i].name = "in";
|
||
else if (wordlist[i].rid == RID_OUT)
|
||
wordlist[i].name = "out";
|
||
else if (wordlist[i].rid == RID_INOUT)
|
||
wordlist[i].name = "inout";
|
||
else if (wordlist[i].rid == RID_BYCOPY)
|
||
wordlist[i].name = "bycopy";
|
||
else if (wordlist[i].rid == RID_BYREF)
|
||
wordlist[i].name = "byref";
|
||
else if (wordlist[i].rid == RID_ONEWAY)
|
||
wordlist[i].name = "oneway";
|
||
}
|
||
|
||
char *
|
||
init_parse (filename)
|
||
char *filename;
|
||
{
|
||
/* Open input file. */
|
||
if (filename == 0 || !strcmp (filename, "-"))
|
||
{
|
||
finput = stdin;
|
||
filename = "stdin";
|
||
}
|
||
else
|
||
finput = fopen (filename, "r");
|
||
|
||
if (finput == 0)
|
||
pfatal_with_name (filename);
|
||
|
||
init_lex ();
|
||
|
||
return filename;
|
||
}
|
||
|
||
void
|
||
finish_parse ()
|
||
{
|
||
fclose(finput);
|
||
}
|
||
|
||
void
|
||
init_lex ()
|
||
{
|
||
/* Make identifier nodes long enough for the language-specific slots. */
|
||
set_identifier_size (sizeof (struct lang_identifier));
|
||
|
||
/* Start it at 0, because check_newline is called at the very beginning
|
||
and will increment it to 1. */
|
||
lineno = 0;
|
||
|
||
maxtoken = 40;
|
||
token_buffer = (char *) xmalloc (maxtoken + 2);
|
||
|
||
ridpointers[(int) RID_INT] = get_identifier ("int");
|
||
ridpointers[(int) RID_CHAR] = get_identifier ("char");
|
||
ridpointers[(int) RID_VOID] = get_identifier ("void");
|
||
ridpointers[(int) RID_FLOAT] = get_identifier ("float");
|
||
ridpointers[(int) RID_DOUBLE] = get_identifier ("double");
|
||
ridpointers[(int) RID_SHORT] = get_identifier ("short");
|
||
ridpointers[(int) RID_LONG] = get_identifier ("long");
|
||
ridpointers[(int) RID_UNSIGNED] = get_identifier ("unsigned");
|
||
ridpointers[(int) RID_SIGNED] = get_identifier ("signed");
|
||
ridpointers[(int) RID_INLINE] = get_identifier ("inline");
|
||
ridpointers[(int) RID_CONST] = get_identifier ("const");
|
||
ridpointers[(int) RID_RESTRICT] = get_identifier ("restrict");
|
||
ridpointers[(int) RID_VOLATILE] = get_identifier ("volatile");
|
||
ridpointers[(int) RID_AUTO] = get_identifier ("auto");
|
||
ridpointers[(int) RID_STATIC] = get_identifier ("static");
|
||
ridpointers[(int) RID_EXTERN] = get_identifier ("extern");
|
||
ridpointers[(int) RID_TYPEDEF] = get_identifier ("typedef");
|
||
ridpointers[(int) RID_REGISTER] = get_identifier ("register");
|
||
ridpointers[(int) RID_ITERATOR] = get_identifier ("iterator");
|
||
ridpointers[(int) RID_COMPLEX] = get_identifier ("complex");
|
||
ridpointers[(int) RID_ID] = get_identifier ("id");
|
||
ridpointers[(int) RID_IN] = get_identifier ("in");
|
||
ridpointers[(int) RID_OUT] = get_identifier ("out");
|
||
ridpointers[(int) RID_INOUT] = get_identifier ("inout");
|
||
ridpointers[(int) RID_BYCOPY] = get_identifier ("bycopy");
|
||
ridpointers[(int) RID_BYREF] = get_identifier ("byref");
|
||
ridpointers[(int) RID_ONEWAY] = get_identifier ("oneway");
|
||
forget_protocol_qualifiers();
|
||
|
||
/* Some options inhibit certain reserved words.
|
||
Clear those words out of the hash table so they won't be recognized. */
|
||
#define UNSET_RESERVED_WORD(STRING) \
|
||
do { struct resword *s = is_reserved_word (STRING, sizeof (STRING) - 1); \
|
||
if (s) s->name = ""; } while (0)
|
||
|
||
|
||
UNSET_RESERVED_WORD ("id");
|
||
|
||
if (flag_traditional)
|
||
{
|
||
UNSET_RESERVED_WORD ("const");
|
||
UNSET_RESERVED_WORD ("restrict");
|
||
UNSET_RESERVED_WORD ("volatile");
|
||
UNSET_RESERVED_WORD ("typeof");
|
||
UNSET_RESERVED_WORD ("signed");
|
||
UNSET_RESERVED_WORD ("inline");
|
||
UNSET_RESERVED_WORD ("iterator");
|
||
UNSET_RESERVED_WORD ("complex");
|
||
}
|
||
else if (!flag_isoc9x)
|
||
UNSET_RESERVED_WORD ("restrict");
|
||
|
||
if (flag_no_asm)
|
||
{
|
||
UNSET_RESERVED_WORD ("asm");
|
||
UNSET_RESERVED_WORD ("typeof");
|
||
UNSET_RESERVED_WORD ("inline");
|
||
UNSET_RESERVED_WORD ("iterator");
|
||
UNSET_RESERVED_WORD ("complex");
|
||
}
|
||
}
|
||
|
||
void
|
||
reinit_parse_for_function ()
|
||
{
|
||
}
|
||
|
||
/* Function used when yydebug is set, to print a token in more detail. */
|
||
|
||
void
|
||
yyprint (file, yychar, yylval)
|
||
FILE *file;
|
||
int yychar;
|
||
YYSTYPE yylval;
|
||
{
|
||
tree t;
|
||
switch (yychar)
|
||
{
|
||
case IDENTIFIER:
|
||
case TYPENAME:
|
||
case OBJECTNAME:
|
||
t = yylval.ttype;
|
||
if (IDENTIFIER_POINTER (t))
|
||
fprintf (file, " `%s'", IDENTIFIER_POINTER (t));
|
||
break;
|
||
|
||
case CONSTANT:
|
||
t = yylval.ttype;
|
||
if (TREE_CODE (t) == INTEGER_CST)
|
||
fprintf (file, " " HOST_WIDE_INT_PRINT_DOUBLE_HEX, TREE_INT_CST_HIGH (t), TREE_INT_CST_LOW (t));
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Iff C is a carriage return, warn about it - if appropriate -
|
||
and return nonzero. */
|
||
static int
|
||
whitespace_cr (c)
|
||
int c;
|
||
{
|
||
static int newline_warning = 0;
|
||
|
||
if (c == '\r')
|
||
{
|
||
/* ANSI C says the effects of a carriage return in a source file
|
||
are undefined. */
|
||
if (pedantic && !newline_warning)
|
||
{
|
||
warning ("carriage return in source file");
|
||
warning ("(we only warn about the first carriage return)");
|
||
newline_warning = 1;
|
||
}
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* If C is not whitespace, return C.
|
||
Otherwise skip whitespace and return first nonwhite char read. */
|
||
|
||
static int
|
||
skip_white_space (c)
|
||
register int c;
|
||
{
|
||
for (;;)
|
||
{
|
||
switch (c)
|
||
{
|
||
/* We don't recognize comments here, because
|
||
cpp output can include / and * consecutively as operators.
|
||
Also, there's no need, since cpp removes all comments. */
|
||
|
||
case '\n':
|
||
c = check_newline ();
|
||
break;
|
||
|
||
case ' ':
|
||
case '\t':
|
||
case '\f':
|
||
case '\v':
|
||
case '\b':
|
||
c = GETC();
|
||
break;
|
||
|
||
case '\r':
|
||
whitespace_cr (c);
|
||
c = GETC();
|
||
break;
|
||
|
||
case '\\':
|
||
c = GETC();
|
||
if (c == '\n')
|
||
lineno++;
|
||
else
|
||
error ("stray '\\' in program");
|
||
c = GETC();
|
||
break;
|
||
|
||
default:
|
||
return (c);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Skips all of the white space at the current location in the input file. */
|
||
|
||
void
|
||
position_after_white_space ()
|
||
{
|
||
int c = GETC();
|
||
UNGETC (skip_white_space (c));
|
||
}
|
||
|
||
/* Like skip_white_space, but don't advance beyond the end of line.
|
||
Moreover, we don't get passed a character to start with. */
|
||
static int
|
||
skip_white_space_on_line ()
|
||
{
|
||
register int c;
|
||
|
||
while (1)
|
||
{
|
||
c = GETC();
|
||
switch (c)
|
||
{
|
||
case '\n':
|
||
default:
|
||
break;
|
||
|
||
case ' ':
|
||
case '\t':
|
||
case '\f':
|
||
case '\v':
|
||
case '\b':
|
||
continue;
|
||
|
||
case '\r':
|
||
whitespace_cr (c);
|
||
continue;
|
||
}
|
||
break;
|
||
}
|
||
return c;
|
||
}
|
||
|
||
/* Make the token buffer longer, preserving the data in it.
|
||
P should point to just beyond the last valid character in the old buffer.
|
||
The value we return is a pointer to the new buffer
|
||
at a place corresponding to P. */
|
||
|
||
static char *
|
||
extend_token_buffer (p)
|
||
char *p;
|
||
{
|
||
int offset = p - token_buffer;
|
||
|
||
maxtoken = maxtoken * 2 + 10;
|
||
token_buffer = (char *) xrealloc (token_buffer, maxtoken + 2);
|
||
|
||
return token_buffer + offset;
|
||
}
|
||
|
||
/* At the beginning of the file, check for a #line directive indicating
|
||
the real name of the file. */
|
||
|
||
void check_line_directive()
|
||
{
|
||
ungetc(check_newline(), finput);
|
||
}
|
||
|
||
/* At the beginning of a line, increment the line number
|
||
and process any #-directive on this line.
|
||
If the line is a #-directive, read the entire line and return a newline.
|
||
Otherwise, return the line's first non-whitespace character. */
|
||
|
||
int
|
||
check_newline ()
|
||
{
|
||
register int c;
|
||
register int token;
|
||
|
||
lineno++;
|
||
|
||
/* Read first nonwhite char on the line. */
|
||
|
||
c = GETC();
|
||
while (c == ' ' || c == '\t')
|
||
c = GETC();
|
||
|
||
if (c != '#')
|
||
{
|
||
/* If not #, return it so caller will use it. */
|
||
return c;
|
||
}
|
||
|
||
/* Read first nonwhite char after the `#'. */
|
||
|
||
c = GETC();
|
||
while (c == ' ' || c == '\t')
|
||
c = GETC();
|
||
|
||
/* If a letter follows, then if the word here is `line', skip
|
||
it and ignore it; otherwise, ignore the line, with an error
|
||
if the word isn't `pragma', `define', or `undef'. */
|
||
|
||
if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
|
||
{
|
||
if (c == 'p')
|
||
{
|
||
if (GETC() == 'r'
|
||
&& GETC() == 'a'
|
||
&& GETC() == 'g'
|
||
&& GETC() == 'm'
|
||
&& GETC() == 'a'
|
||
&& ((c = GETC()) == ' ' || c == '\t' || c == '\n' || whitespace_cr (c)))
|
||
{
|
||
warning ("ignoring pragma");
|
||
goto skipline;
|
||
}
|
||
}
|
||
|
||
else if (c == 'd')
|
||
{
|
||
if (GETC() == 'e'
|
||
&& GETC() == 'f'
|
||
&& GETC() == 'i'
|
||
&& GETC() == 'n'
|
||
&& GETC() == 'e'
|
||
&& ((c = GETC()) == ' ' || c == '\t' || c == '\n'))
|
||
{
|
||
if (c != '\n')
|
||
debug_define (lineno, GET_DIRECTIVE_LINE ());
|
||
goto skipline;
|
||
}
|
||
}
|
||
else if (c == 'u')
|
||
{
|
||
if (GETC() == 'n'
|
||
&& GETC() == 'd'
|
||
&& GETC() == 'e'
|
||
&& GETC() == 'f'
|
||
&& ((c = GETC()) == ' ' || c == '\t' || c == '\n'))
|
||
{
|
||
if (c != '\n')
|
||
debug_undef (lineno, GET_DIRECTIVE_LINE ());
|
||
goto skipline;
|
||
}
|
||
}
|
||
else if (c == 'l')
|
||
{
|
||
if (GETC() == 'i'
|
||
&& GETC() == 'n'
|
||
&& GETC() == 'e'
|
||
&& ((c = GETC()) == ' ' || c == '\t'))
|
||
goto linenum;
|
||
}
|
||
|
||
error ("undefined or invalid # directive");
|
||
goto skipline;
|
||
}
|
||
|
||
linenum:
|
||
/* Here we have either `#line' or `# <nonletter>'.
|
||
In either case, it should be a line number; a digit should follow. */
|
||
|
||
/* Can't use skip_white_space here, but must handle all whitespace
|
||
that is not '\n', lest we get a recursion for '\r' '\n' when
|
||
calling yylex. */
|
||
UNGETC (c);
|
||
c = skip_white_space_on_line ();
|
||
|
||
/* If the # is the only nonwhite char on the line,
|
||
just ignore it. Check the new newline. */
|
||
if (c == '\n')
|
||
return c;
|
||
|
||
/* Something follows the #; read a token. */
|
||
|
||
UNGETC (c);
|
||
token = yylex ();
|
||
|
||
if (token == CONSTANT
|
||
&& TREE_CODE (yylval.ttype) == INTEGER_CST)
|
||
{
|
||
int old_lineno = lineno;
|
||
int used_up = 0;
|
||
/* subtract one, because it is the following line that
|
||
gets the specified number */
|
||
|
||
int l = TREE_INT_CST_LOW (yylval.ttype) - 1;
|
||
|
||
/* Is this the last nonwhite stuff on the line? */
|
||
c = skip_white_space_on_line ();
|
||
if (c == '\n')
|
||
{
|
||
/* No more: store the line number and check following line. */
|
||
lineno = l;
|
||
return c;
|
||
}
|
||
UNGETC (c);
|
||
|
||
/* More follows: it must be a string constant (filename). */
|
||
|
||
/* Read the string constant. */
|
||
token = yylex ();
|
||
|
||
if (token != STRING || TREE_CODE (yylval.ttype) != STRING_CST)
|
||
{
|
||
error ("invalid #line");
|
||
goto skipline;
|
||
}
|
||
|
||
input_filename
|
||
= (char *) permalloc (TREE_STRING_LENGTH (yylval.ttype) + 1);
|
||
strcpy (input_filename, TREE_STRING_POINTER (yylval.ttype));
|
||
lineno = l;
|
||
|
||
/* Each change of file name
|
||
reinitializes whether we are now in a system header. */
|
||
in_system_header = 0;
|
||
|
||
if (main_input_filename == 0)
|
||
main_input_filename = input_filename;
|
||
|
||
/* Is this the last nonwhite stuff on the line? */
|
||
c = skip_white_space_on_line ();
|
||
if (c == '\n')
|
||
{
|
||
/* Update the name in the top element of input_file_stack. */
|
||
if (input_file_stack)
|
||
input_file_stack->name = input_filename;
|
||
|
||
return c;
|
||
}
|
||
UNGETC (c);
|
||
|
||
token = yylex ();
|
||
used_up = 0;
|
||
|
||
/* `1' after file name means entering new file.
|
||
`2' after file name means just left a file. */
|
||
|
||
if (token == CONSTANT
|
||
&& TREE_CODE (yylval.ttype) == INTEGER_CST)
|
||
{
|
||
if (TREE_INT_CST_LOW (yylval.ttype) == 1)
|
||
{
|
||
/* Pushing to a new file. */
|
||
struct file_stack *p
|
||
= (struct file_stack *) xmalloc (sizeof (struct file_stack));
|
||
input_file_stack->line = old_lineno;
|
||
p->next = input_file_stack;
|
||
p->name = input_filename;
|
||
p->indent_level = indent_level;
|
||
input_file_stack = p;
|
||
input_file_stack_tick++;
|
||
debug_start_source_file (input_filename);
|
||
used_up = 1;
|
||
}
|
||
else if (TREE_INT_CST_LOW (yylval.ttype) == 2)
|
||
{
|
||
/* Popping out of a file. */
|
||
if (input_file_stack->next)
|
||
{
|
||
struct file_stack *p = input_file_stack;
|
||
if (indent_level != p->indent_level)
|
||
{
|
||
warning_with_file_and_line
|
||
(p->name, old_lineno,
|
||
"This file contains more `%c's than `%c's.",
|
||
indent_level > p->indent_level ? '{' : '}',
|
||
indent_level > p->indent_level ? '}' : '{');
|
||
}
|
||
input_file_stack = p->next;
|
||
free (p);
|
||
input_file_stack_tick++;
|
||
debug_end_source_file (input_file_stack->line);
|
||
}
|
||
else
|
||
error ("#-lines for entering and leaving files don't match");
|
||
|
||
used_up = 1;
|
||
}
|
||
}
|
||
|
||
/* Now that we've pushed or popped the input stack,
|
||
update the name in the top element. */
|
||
if (input_file_stack)
|
||
input_file_stack->name = input_filename;
|
||
|
||
/* If we have handled a `1' or a `2',
|
||
see if there is another number to read. */
|
||
if (used_up)
|
||
{
|
||
/* Is this the last nonwhite stuff on the line? */
|
||
c = skip_white_space_on_line ();
|
||
if (c == '\n')
|
||
return c;
|
||
UNGETC (c);
|
||
|
||
token = yylex ();
|
||
used_up = 0;
|
||
}
|
||
|
||
/* `3' after file name means this is a system header file. */
|
||
|
||
if (token == CONSTANT
|
||
&& TREE_CODE (yylval.ttype) == INTEGER_CST
|
||
&& TREE_INT_CST_LOW (yylval.ttype) == 3)
|
||
in_system_header = 1, used_up = 1;
|
||
|
||
if (used_up)
|
||
{
|
||
/* Is this the last nonwhite stuff on the line? */
|
||
c = skip_white_space_on_line ();
|
||
if (c == '\n')
|
||
return c;
|
||
UNGETC (c);
|
||
}
|
||
|
||
warning ("unrecognized text at end of #line");
|
||
}
|
||
else
|
||
error ("invalid #-line");
|
||
|
||
/* skip the rest of this line. */
|
||
skipline:
|
||
while (c != '\n' && c != EOF)
|
||
c = GETC();
|
||
return c;
|
||
}
|
||
|
||
#define ENDFILE -1 /* token that represents end-of-file */
|
||
|
||
/* Read an escape sequence, returning its equivalent as a character,
|
||
or store 1 in *ignore_ptr if it is backslash-newline. */
|
||
|
||
static int
|
||
readescape (ignore_ptr)
|
||
int *ignore_ptr;
|
||
{
|
||
register int c = GETC();
|
||
register int code;
|
||
register unsigned count;
|
||
unsigned firstdig = 0;
|
||
int nonnull;
|
||
|
||
switch (c)
|
||
{
|
||
case 'x':
|
||
if (warn_traditional)
|
||
warning ("the meaning of `\\x' varies with -traditional");
|
||
|
||
if (flag_traditional)
|
||
return c;
|
||
|
||
code = 0;
|
||
count = 0;
|
||
nonnull = 0;
|
||
while (1)
|
||
{
|
||
c = GETC();
|
||
if (!(c >= 'a' && c <= 'f')
|
||
&& !(c >= 'A' && c <= 'F')
|
||
&& !(c >= '0' && c <= '9'))
|
||
{
|
||
UNGETC (c);
|
||
break;
|
||
}
|
||
code *= 16;
|
||
if (c >= 'a' && c <= 'f')
|
||
code += c - 'a' + 10;
|
||
if (c >= 'A' && c <= 'F')
|
||
code += c - 'A' + 10;
|
||
if (c >= '0' && c <= '9')
|
||
code += c - '0';
|
||
if (code != 0 || count != 0)
|
||
{
|
||
if (count == 0)
|
||
firstdig = code;
|
||
count++;
|
||
}
|
||
nonnull = 1;
|
||
}
|
||
if (! nonnull)
|
||
error ("\\x used with no following hex digits");
|
||
else if (count == 0)
|
||
/* Digits are all 0's. Ok. */
|
||
;
|
||
else if ((count - 1) * 4 >= TYPE_PRECISION (integer_type_node)
|
||
|| (count > 1
|
||
&& (((unsigned)1 << (TYPE_PRECISION (integer_type_node) - (count - 1) * 4))
|
||
<= firstdig)))
|
||
pedwarn ("hex escape out of range");
|
||
return code;
|
||
|
||
case '0': case '1': case '2': case '3': case '4':
|
||
case '5': case '6': case '7':
|
||
code = 0;
|
||
count = 0;
|
||
while ((c <= '7') && (c >= '0') && (count++ < 3))
|
||
{
|
||
code = (code * 8) + (c - '0');
|
||
c = GETC();
|
||
}
|
||
UNGETC (c);
|
||
return code;
|
||
|
||
case '\\': case '\'': case '"':
|
||
return c;
|
||
|
||
case '\n':
|
||
lineno++;
|
||
*ignore_ptr = 1;
|
||
return 0;
|
||
|
||
case 'n':
|
||
return TARGET_NEWLINE;
|
||
|
||
case 't':
|
||
return TARGET_TAB;
|
||
|
||
case 'r':
|
||
return TARGET_CR;
|
||
|
||
case 'f':
|
||
return TARGET_FF;
|
||
|
||
case 'b':
|
||
return TARGET_BS;
|
||
|
||
case 'a':
|
||
if (warn_traditional)
|
||
warning ("the meaning of `\\a' varies with -traditional");
|
||
|
||
if (flag_traditional)
|
||
return c;
|
||
return TARGET_BELL;
|
||
|
||
case 'v':
|
||
#if 0 /* Vertical tab is present in common usage compilers. */
|
||
if (flag_traditional)
|
||
return c;
|
||
#endif
|
||
return TARGET_VT;
|
||
|
||
case 'e':
|
||
case 'E':
|
||
if (pedantic)
|
||
pedwarn ("non-ANSI-standard escape sequence, `\\%c'", c);
|
||
return 033;
|
||
|
||
case '?':
|
||
return c;
|
||
|
||
/* `\(', etc, are used at beginning of line to avoid confusing Emacs. */
|
||
case '(':
|
||
case '{':
|
||
case '[':
|
||
/* `\%' is used to prevent SCCS from getting confused. */
|
||
case '%':
|
||
if (pedantic)
|
||
pedwarn ("non-ANSI escape sequence `\\%c'", c);
|
||
return c;
|
||
}
|
||
if (c >= 040 && c < 0177)
|
||
pedwarn ("unknown escape sequence `\\%c'", c);
|
||
else
|
||
pedwarn ("unknown escape sequence: `\\' followed by char code 0x%x", c);
|
||
return c;
|
||
}
|
||
|
||
void
|
||
yyerror (string)
|
||
char *string;
|
||
{
|
||
char buf[200];
|
||
|
||
strcpy (buf, string);
|
||
|
||
/* We can't print string and character constants well
|
||
because the token_buffer contains the result of processing escapes. */
|
||
if (end_of_file)
|
||
strcat (buf, " at end of input");
|
||
else if (token_buffer[0] == 0)
|
||
strcat (buf, " at null character");
|
||
else if (token_buffer[0] == '"')
|
||
strcat (buf, " before string constant");
|
||
else if (token_buffer[0] == '\'')
|
||
strcat (buf, " before character constant");
|
||
else if (token_buffer[0] < 040 || (unsigned char) token_buffer[0] >= 0177)
|
||
sprintf (buf + strlen (buf), " before character 0%o",
|
||
(unsigned char) token_buffer[0]);
|
||
else
|
||
strcat (buf, " before `%s'");
|
||
|
||
error (buf, token_buffer);
|
||
}
|
||
|
||
#if 0
|
||
|
||
struct try_type
|
||
{
|
||
tree *node_var;
|
||
char unsigned_flag;
|
||
char long_flag;
|
||
char long_long_flag;
|
||
};
|
||
|
||
struct try_type type_sequence[] =
|
||
{
|
||
{ &integer_type_node, 0, 0, 0},
|
||
{ &unsigned_type_node, 1, 0, 0},
|
||
{ &long_integer_type_node, 0, 1, 0},
|
||
{ &long_unsigned_type_node, 1, 1, 0},
|
||
{ &long_long_integer_type_node, 0, 1, 1},
|
||
{ &long_long_unsigned_type_node, 1, 1, 1}
|
||
};
|
||
#endif /* 0 */
|
||
|
||
int
|
||
yylex ()
|
||
{
|
||
register int c;
|
||
register char *p;
|
||
register int value;
|
||
int wide_flag = 0;
|
||
|
||
c = GETC();
|
||
|
||
/* Effectively do c = skip_white_space (c)
|
||
but do it faster in the usual cases. */
|
||
while (1)
|
||
switch (c)
|
||
{
|
||
case ' ':
|
||
case '\t':
|
||
case '\f':
|
||
case '\v':
|
||
case '\b':
|
||
c = GETC();
|
||
break;
|
||
|
||
case '\r':
|
||
/* Call skip_white_space so we can warn if appropriate. */
|
||
|
||
case '\n':
|
||
case '/':
|
||
case '\\':
|
||
c = skip_white_space (c);
|
||
default:
|
||
goto found_nonwhite;
|
||
}
|
||
found_nonwhite:
|
||
|
||
token_buffer[0] = c;
|
||
token_buffer[1] = 0;
|
||
|
||
/* yylloc.first_line = lineno; */
|
||
|
||
switch (c)
|
||
{
|
||
case EOF:
|
||
end_of_file = 1;
|
||
token_buffer[0] = 0;
|
||
value = ENDFILE;
|
||
break;
|
||
|
||
case 'L':
|
||
/* Capital L may start a wide-string or wide-character constant. */
|
||
{
|
||
register int c = GETC();
|
||
if (c == '\'')
|
||
{
|
||
wide_flag = 1;
|
||
goto char_constant;
|
||
}
|
||
if (c == '"')
|
||
{
|
||
wide_flag = 1;
|
||
goto string_constant;
|
||
}
|
||
UNGETC (c);
|
||
}
|
||
goto letter;
|
||
|
||
case '@':
|
||
value = c;
|
||
break;
|
||
|
||
case 'A': case 'B': case 'C': case 'D': case 'E':
|
||
case 'F': case 'G': case 'H': case 'I': case 'J':
|
||
case 'K': 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 '_':
|
||
letter:
|
||
p = token_buffer;
|
||
while (ISALNUM (c) || c == '_')
|
||
{
|
||
if (p >= token_buffer + maxtoken)
|
||
p = extend_token_buffer (p);
|
||
|
||
*p++ = c;
|
||
c = GETC();
|
||
}
|
||
|
||
*p = 0;
|
||
UNGETC (c);
|
||
|
||
value = IDENTIFIER;
|
||
yylval.itype = 0;
|
||
|
||
/* Try to recognize a keyword. Uses minimum-perfect hash function */
|
||
|
||
{
|
||
register struct resword *ptr;
|
||
|
||
if ((ptr = is_reserved_word (token_buffer, p - token_buffer)))
|
||
{
|
||
if (ptr->rid)
|
||
yylval.ttype = ridpointers[(int) ptr->rid];
|
||
value = (int) ptr->token;
|
||
|
||
/* Even if we decided to recognize asm, still perhaps warn. */
|
||
if (pedantic
|
||
&& (value == ASM_KEYWORD || value == TYPEOF
|
||
|| ptr->rid == RID_INLINE)
|
||
&& token_buffer[0] != '_')
|
||
pedwarn ("ANSI does not permit the keyword `%s'",
|
||
token_buffer);
|
||
}
|
||
}
|
||
|
||
/* If we did not find a keyword, look for an identifier
|
||
(or a typename). */
|
||
|
||
if (value == IDENTIFIER)
|
||
{
|
||
if (token_buffer[0] == '@')
|
||
error("invalid identifier `%s'", token_buffer);
|
||
|
||
yylval.ttype = get_identifier (token_buffer);
|
||
lastiddecl = lookup_name (yylval.ttype);
|
||
|
||
if (lastiddecl != 0 && TREE_CODE (lastiddecl) == TYPE_DECL)
|
||
value = TYPENAME;
|
||
/* A user-invisible read-only initialized variable
|
||
should be replaced by its value.
|
||
We handle only strings since that's the only case used in C. */
|
||
else if (lastiddecl != 0 && TREE_CODE (lastiddecl) == VAR_DECL
|
||
&& DECL_IGNORED_P (lastiddecl)
|
||
&& TREE_READONLY (lastiddecl)
|
||
&& DECL_INITIAL (lastiddecl) != 0
|
||
&& TREE_CODE (DECL_INITIAL (lastiddecl)) == STRING_CST)
|
||
{
|
||
tree stringval = DECL_INITIAL (lastiddecl);
|
||
|
||
/* Copy the string value so that we won't clobber anything
|
||
if we put something in the TREE_CHAIN of this one. */
|
||
yylval.ttype = build_string (TREE_STRING_LENGTH (stringval),
|
||
TREE_STRING_POINTER (stringval));
|
||
value = STRING;
|
||
}
|
||
}
|
||
|
||
break;
|
||
|
||
case '0': case '1':
|
||
{
|
||
int next_c;
|
||
/* Check first for common special case: single-digit 0 or 1. */
|
||
|
||
next_c = GETC ();
|
||
UNGETC (next_c); /* Always undo this lookahead. */
|
||
if (!ISALNUM (next_c) && next_c != '.')
|
||
{
|
||
token_buffer[0] = (char)c, token_buffer[1] = '\0';
|
||
yylval.ttype = (c == '0') ? integer_zero_node : integer_one_node;
|
||
value = CONSTANT;
|
||
break;
|
||
}
|
||
/*FALLTHRU*/
|
||
}
|
||
case '2': case '3': case '4':
|
||
case '5': case '6': case '7': case '8': case '9':
|
||
case '.':
|
||
{
|
||
int base = 10;
|
||
int count = 0;
|
||
int largest_digit = 0;
|
||
int numdigits = 0;
|
||
/* for multi-precision arithmetic,
|
||
we actually store only HOST_BITS_PER_CHAR bits in each part.
|
||
The number of parts is chosen so as to be sufficient to hold
|
||
the enough bits to fit into the two HOST_WIDE_INTs that contain
|
||
the integer value (this is always at least as many bits as are
|
||
in a target `long long' value, but may be wider). */
|
||
#define TOTAL_PARTS ((HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR) * 2 + 2)
|
||
int parts[TOTAL_PARTS];
|
||
int overflow = 0;
|
||
|
||
enum anon1 { NOT_FLOAT, AFTER_POINT, TOO_MANY_POINTS, AFTER_EXPON}
|
||
floatflag = NOT_FLOAT;
|
||
|
||
for (count = 0; count < TOTAL_PARTS; count++)
|
||
parts[count] = 0;
|
||
|
||
p = token_buffer;
|
||
*p++ = c;
|
||
|
||
if (c == '0')
|
||
{
|
||
*p++ = (c = GETC());
|
||
if ((c == 'x') || (c == 'X'))
|
||
{
|
||
base = 16;
|
||
*p++ = (c = GETC());
|
||
}
|
||
/* Leading 0 forces octal unless the 0 is the only digit. */
|
||
else if (c >= '0' && c <= '9')
|
||
{
|
||
base = 8;
|
||
numdigits++;
|
||
}
|
||
else
|
||
numdigits++;
|
||
}
|
||
|
||
/* Read all the digits-and-decimal-points. */
|
||
|
||
while (c == '.'
|
||
|| (ISALNUM (c) && c != 'l' && c != 'L'
|
||
&& c != 'u' && c != 'U'
|
||
&& c != 'i' && c != 'I' && c != 'j' && c != 'J'
|
||
&& (floatflag == NOT_FLOAT || ((c != 'f') && (c != 'F')))))
|
||
{
|
||
if (c == '.')
|
||
{
|
||
if (base == 16 && pedantic)
|
||
error ("floating constant may not be in radix 16");
|
||
if (floatflag == TOO_MANY_POINTS)
|
||
/* We have already emitted an error. Don't need another. */
|
||
;
|
||
else if (floatflag == AFTER_POINT || floatflag == AFTER_EXPON)
|
||
{
|
||
error ("malformed floating constant");
|
||
floatflag = TOO_MANY_POINTS;
|
||
/* Avoid another error from atof by forcing all characters
|
||
from here on to be ignored. */
|
||
p[-1] = '\0';
|
||
}
|
||
else
|
||
floatflag = AFTER_POINT;
|
||
|
||
if (base == 8)
|
||
base = 10;
|
||
*p++ = c = GETC();
|
||
/* Accept '.' as the start of a floating-point number
|
||
only when it is followed by a digit.
|
||
Otherwise, unread the following non-digit
|
||
and use the '.' as a structural token. */
|
||
if (p == token_buffer + 2 && !ISDIGIT (c))
|
||
{
|
||
if (c == '.')
|
||
{
|
||
c = GETC();
|
||
if (c == '.')
|
||
{
|
||
*p++ = c;
|
||
*p = 0;
|
||
return ELLIPSIS;
|
||
}
|
||
error ("parse error at `..'");
|
||
}
|
||
UNGETC (c);
|
||
token_buffer[1] = 0;
|
||
value = '.';
|
||
goto done;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* It is not a decimal point.
|
||
It should be a digit (perhaps a hex digit). */
|
||
|
||
if (ISDIGIT (c))
|
||
{
|
||
c = c - '0';
|
||
}
|
||
else if (base <= 10)
|
||
{
|
||
if (c == 'e' || c == 'E')
|
||
{
|
||
base = 10;
|
||
floatflag = AFTER_EXPON;
|
||
break; /* start of exponent */
|
||
}
|
||
error ("nondigits in number and not hexadecimal");
|
||
c = 0;
|
||
}
|
||
else if (base == 16 && (c == 'p' || c == 'P'))
|
||
{
|
||
floatflag = AFTER_EXPON;
|
||
break; /* start of exponent */
|
||
}
|
||
else if (c >= 'a')
|
||
{
|
||
c = c - 'a' + 10;
|
||
}
|
||
else
|
||
{
|
||
c = c - 'A' + 10;
|
||
}
|
||
if (c >= largest_digit)
|
||
largest_digit = c;
|
||
numdigits++;
|
||
|
||
for (count = 0; count < TOTAL_PARTS; count++)
|
||
{
|
||
parts[count] *= base;
|
||
if (count)
|
||
{
|
||
parts[count]
|
||
+= (parts[count-1] >> HOST_BITS_PER_CHAR);
|
||
parts[count-1]
|
||
&= (1 << HOST_BITS_PER_CHAR) - 1;
|
||
}
|
||
else
|
||
parts[0] += c;
|
||
}
|
||
|
||
/* If the extra highest-order part ever gets anything in it,
|
||
the number is certainly too big. */
|
||
if (parts[TOTAL_PARTS - 1] != 0)
|
||
overflow = 1;
|
||
|
||
if (p >= token_buffer + maxtoken - 3)
|
||
p = extend_token_buffer (p);
|
||
*p++ = (c = GETC());
|
||
}
|
||
}
|
||
|
||
if (numdigits == 0)
|
||
error ("numeric constant with no digits");
|
||
|
||
if (largest_digit >= base)
|
||
error ("numeric constant contains digits beyond the radix");
|
||
|
||
/* Remove terminating char from the token buffer and delimit the string */
|
||
*--p = 0;
|
||
|
||
if (floatflag != NOT_FLOAT)
|
||
{
|
||
tree type = double_type_node;
|
||
int imag = 0;
|
||
int conversion_errno = 0;
|
||
REAL_VALUE_TYPE value;
|
||
jmp_buf handler;
|
||
|
||
/* Read explicit exponent if any, and put it in tokenbuf. */
|
||
|
||
if ((base == 10 && ((c == 'e') || (c == 'E')))
|
||
|| (base == 16 && (c == 'p' || c == 'P')))
|
||
{
|
||
if (p >= token_buffer + maxtoken - 3)
|
||
p = extend_token_buffer (p);
|
||
*p++ = c;
|
||
c = GETC();
|
||
if ((c == '+') || (c == '-'))
|
||
{
|
||
*p++ = c;
|
||
c = GETC();
|
||
}
|
||
/* Exponent is decimal, even if string is a hex float. */
|
||
if (! ISDIGIT (c))
|
||
error ("floating constant exponent has no digits");
|
||
while (ISDIGIT (c))
|
||
{
|
||
if (p >= token_buffer + maxtoken - 3)
|
||
p = extend_token_buffer (p);
|
||
*p++ = c;
|
||
c = GETC();
|
||
}
|
||
}
|
||
if (base == 16 && floatflag != AFTER_EXPON)
|
||
error ("hexadecimal floating constant has no exponent");
|
||
|
||
*p = 0;
|
||
|
||
/* Convert string to a double, checking for overflow. */
|
||
if (setjmp (handler))
|
||
{
|
||
error ("floating constant out of range");
|
||
value = dconst0;
|
||
}
|
||
else
|
||
{
|
||
int fflag = 0, lflag = 0;
|
||
/* Copy token_buffer now, while it has just the number
|
||
and not the suffixes; once we add `f' or `i',
|
||
REAL_VALUE_ATOF may not work any more. */
|
||
char *copy = (char *) alloca (p - token_buffer + 1);
|
||
copy_memory (token_buffer, copy, p - token_buffer + 1);
|
||
|
||
set_float_handler (handler);
|
||
|
||
while (1)
|
||
{
|
||
int lose = 0;
|
||
|
||
/* Read the suffixes to choose a data type. */
|
||
switch (c)
|
||
{
|
||
case 'f': case 'F':
|
||
if (fflag)
|
||
error ("more than one `f' in numeric constant");
|
||
fflag = 1;
|
||
break;
|
||
|
||
case 'l': case 'L':
|
||
if (lflag)
|
||
error ("more than one `l' in numeric constant");
|
||
lflag = 1;
|
||
break;
|
||
|
||
case 'i': case 'I':
|
||
if (imag)
|
||
error ("more than one `i' or `j' in numeric constant");
|
||
else if (pedantic)
|
||
pedwarn ("ANSI C forbids imaginary numeric constants");
|
||
imag = 1;
|
||
break;
|
||
|
||
default:
|
||
lose = 1;
|
||
}
|
||
|
||
if (lose)
|
||
break;
|
||
|
||
if (p >= token_buffer + maxtoken - 3)
|
||
p = extend_token_buffer (p);
|
||
*p++ = c;
|
||
*p = 0;
|
||
c = GETC();
|
||
}
|
||
|
||
/* The second argument, machine_mode, of REAL_VALUE_ATOF
|
||
tells the desired precision of the binary result
|
||
of decimal-to-binary conversion. */
|
||
|
||
if (fflag)
|
||
{
|
||
if (lflag)
|
||
error ("both `f' and `l' in floating constant");
|
||
|
||
type = float_type_node;
|
||
errno = 0;
|
||
if (base == 16)
|
||
value = REAL_VALUE_HTOF (copy, TYPE_MODE (type));
|
||
else
|
||
value = REAL_VALUE_ATOF (copy, TYPE_MODE (type));
|
||
conversion_errno = errno;
|
||
/* A diagnostic is required here by some ANSI C testsuites.
|
||
This is not pedwarn, because some people don't want
|
||
an error for this. */
|
||
if (REAL_VALUE_ISINF (value) && pedantic)
|
||
warning ("floating point number exceeds range of `float'");
|
||
}
|
||
else if (lflag)
|
||
{
|
||
type = long_double_type_node;
|
||
errno = 0;
|
||
if (base == 16)
|
||
value = REAL_VALUE_HTOF (copy, TYPE_MODE (type));
|
||
else
|
||
value = REAL_VALUE_ATOF (copy, TYPE_MODE (type));
|
||
conversion_errno = errno;
|
||
if (REAL_VALUE_ISINF (value) && pedantic)
|
||
warning ("floating point number exceeds range of `long double'");
|
||
}
|
||
else
|
||
{
|
||
errno = 0;
|
||
if (base == 16)
|
||
value = REAL_VALUE_HTOF (copy, TYPE_MODE (type));
|
||
else
|
||
value = REAL_VALUE_ATOF (copy, TYPE_MODE (type));
|
||
conversion_errno = errno;
|
||
if (REAL_VALUE_ISINF (value) && pedantic)
|
||
warning ("floating point number exceeds range of `double'");
|
||
}
|
||
|
||
set_float_handler (NULL);
|
||
}
|
||
#ifdef ERANGE
|
||
/* ERANGE is also reported for underflow,
|
||
so test the value to distinguish overflow from that. */
|
||
if (conversion_errno == ERANGE && !flag_traditional && pedantic
|
||
&& (REAL_VALUES_LESS (dconst1, value)
|
||
|| REAL_VALUES_LESS (value, dconstm1)))
|
||
warning ("floating point number exceeds range of `double'");
|
||
#endif
|
||
|
||
/* If the result is not a number, assume it must have been
|
||
due to some error message above, so silently convert
|
||
it to a zero. */
|
||
if (REAL_VALUE_ISNAN (value))
|
||
value = dconst0;
|
||
|
||
/* Create a node with determined type and value. */
|
||
if (imag)
|
||
yylval.ttype = build_complex (NULL_TREE,
|
||
convert (type, integer_zero_node),
|
||
build_real (type, value));
|
||
else
|
||
yylval.ttype = build_real (type, value);
|
||
}
|
||
else
|
||
{
|
||
tree traditional_type, ansi_type, type;
|
||
HOST_WIDE_INT high, low;
|
||
int spec_unsigned = 0;
|
||
int spec_long = 0;
|
||
int spec_long_long = 0;
|
||
int spec_imag = 0;
|
||
int bytes, warn, i;
|
||
|
||
traditional_type = ansi_type = type = NULL_TREE;
|
||
while (1)
|
||
{
|
||
if (c == 'u' || c == 'U')
|
||
{
|
||
if (spec_unsigned)
|
||
error ("two `u's in integer constant");
|
||
spec_unsigned = 1;
|
||
}
|
||
else if (c == 'l' || c == 'L')
|
||
{
|
||
if (spec_long)
|
||
{
|
||
if (spec_long_long)
|
||
error ("three `l's in integer constant");
|
||
else if (pedantic && ! in_system_header && warn_long_long)
|
||
pedwarn ("ANSI C forbids long long integer constants");
|
||
spec_long_long = 1;
|
||
}
|
||
spec_long = 1;
|
||
}
|
||
else if (c == 'i' || c == 'j' || c == 'I' || c == 'J')
|
||
{
|
||
if (spec_imag)
|
||
error ("more than one `i' or `j' in numeric constant");
|
||
else if (pedantic)
|
||
pedwarn ("ANSI C forbids imaginary numeric constants");
|
||
spec_imag = 1;
|
||
}
|
||
else
|
||
break;
|
||
if (p >= token_buffer + maxtoken - 3)
|
||
p = extend_token_buffer (p);
|
||
*p++ = c;
|
||
c = GETC();
|
||
}
|
||
|
||
/* If the constant won't fit in an unsigned long long,
|
||
then warn that the constant is out of range. */
|
||
|
||
/* ??? This assumes that long long and long integer types are
|
||
a multiple of 8 bits. This better than the original code
|
||
though which assumed that long was exactly 32 bits and long
|
||
long was exactly 64 bits. */
|
||
|
||
bytes = TYPE_PRECISION (long_long_integer_type_node) / 8;
|
||
|
||
warn = overflow;
|
||
for (i = bytes; i < TOTAL_PARTS; i++)
|
||
if (parts[i])
|
||
warn = 1;
|
||
if (warn)
|
||
pedwarn ("integer constant out of range");
|
||
|
||
/* This is simplified by the fact that our constant
|
||
is always positive. */
|
||
|
||
high = low = 0;
|
||
|
||
for (i = 0; i < HOST_BITS_PER_WIDE_INT / HOST_BITS_PER_CHAR; i++)
|
||
{
|
||
high |= ((HOST_WIDE_INT) parts[i + (HOST_BITS_PER_WIDE_INT
|
||
/ HOST_BITS_PER_CHAR)]
|
||
<< (i * HOST_BITS_PER_CHAR));
|
||
low |= (HOST_WIDE_INT) parts[i] << (i * HOST_BITS_PER_CHAR);
|
||
}
|
||
|
||
yylval.ttype = build_int_2 (low, high);
|
||
TREE_TYPE (yylval.ttype) = long_long_unsigned_type_node;
|
||
|
||
/* If warn_traditional, calculate both the ANSI type and the
|
||
traditional type, then see if they disagree.
|
||
Otherwise, calculate only the type for the dialect in use. */
|
||
if (warn_traditional || flag_traditional)
|
||
{
|
||
/* Calculate the traditional type. */
|
||
/* Traditionally, any constant is signed;
|
||
but if unsigned is specified explicitly, obey that.
|
||
Use the smallest size with the right number of bits,
|
||
except for one special case with decimal constants. */
|
||
if (! spec_long && base != 10
|
||
&& int_fits_type_p (yylval.ttype, unsigned_type_node))
|
||
traditional_type = (spec_unsigned ? unsigned_type_node
|
||
: integer_type_node);
|
||
/* A decimal constant must be long
|
||
if it does not fit in type int.
|
||
I think this is independent of whether
|
||
the constant is signed. */
|
||
else if (! spec_long && base == 10
|
||
&& int_fits_type_p (yylval.ttype, integer_type_node))
|
||
traditional_type = (spec_unsigned ? unsigned_type_node
|
||
: integer_type_node);
|
||
else if (! spec_long_long)
|
||
traditional_type = (spec_unsigned ? long_unsigned_type_node
|
||
: long_integer_type_node);
|
||
else
|
||
traditional_type = (spec_unsigned
|
||
? long_long_unsigned_type_node
|
||
: long_long_integer_type_node);
|
||
}
|
||
if (warn_traditional || ! flag_traditional)
|
||
{
|
||
/* Calculate the ANSI type. */
|
||
if (! spec_long && ! spec_unsigned
|
||
&& int_fits_type_p (yylval.ttype, integer_type_node))
|
||
ansi_type = integer_type_node;
|
||
else if (! spec_long && (base != 10 || spec_unsigned)
|
||
&& int_fits_type_p (yylval.ttype, unsigned_type_node))
|
||
ansi_type = unsigned_type_node;
|
||
else if (! spec_unsigned && !spec_long_long
|
||
&& int_fits_type_p (yylval.ttype, long_integer_type_node))
|
||
ansi_type = long_integer_type_node;
|
||
else if (! spec_long_long
|
||
&& int_fits_type_p (yylval.ttype,
|
||
long_unsigned_type_node))
|
||
ansi_type = long_unsigned_type_node;
|
||
else if (! spec_unsigned
|
||
&& int_fits_type_p (yylval.ttype,
|
||
long_long_integer_type_node))
|
||
ansi_type = long_long_integer_type_node;
|
||
else
|
||
ansi_type = long_long_unsigned_type_node;
|
||
}
|
||
|
||
type = flag_traditional ? traditional_type : ansi_type;
|
||
|
||
if (warn_traditional && traditional_type != ansi_type)
|
||
{
|
||
if (TYPE_PRECISION (traditional_type)
|
||
!= TYPE_PRECISION (ansi_type))
|
||
warning ("width of integer constant changes with -traditional");
|
||
else if (TREE_UNSIGNED (traditional_type)
|
||
!= TREE_UNSIGNED (ansi_type))
|
||
warning ("integer constant is unsigned in ANSI C, signed with -traditional");
|
||
else
|
||
warning ("width of integer constant may change on other systems with -traditional");
|
||
}
|
||
|
||
if (pedantic && !flag_traditional && !spec_long_long && !warn
|
||
&& (TYPE_PRECISION (long_integer_type_node)
|
||
< TYPE_PRECISION (type)))
|
||
pedwarn ("integer constant out of range");
|
||
|
||
if (base == 10 && ! spec_unsigned && TREE_UNSIGNED (type))
|
||
warning ("decimal constant is so large that it is unsigned");
|
||
|
||
if (spec_imag)
|
||
{
|
||
if (TYPE_PRECISION (type)
|
||
<= TYPE_PRECISION (integer_type_node))
|
||
yylval.ttype
|
||
= build_complex (NULL_TREE, integer_zero_node,
|
||
convert (integer_type_node,
|
||
yylval.ttype));
|
||
else
|
||
error ("complex integer constant is too wide for `complex int'");
|
||
}
|
||
else if (flag_traditional && !int_fits_type_p (yylval.ttype, type))
|
||
/* The traditional constant 0x80000000 is signed
|
||
but doesn't fit in the range of int.
|
||
This will change it to -0x80000000, which does fit. */
|
||
{
|
||
TREE_TYPE (yylval.ttype) = unsigned_type (type);
|
||
yylval.ttype = convert (type, yylval.ttype);
|
||
TREE_OVERFLOW (yylval.ttype)
|
||
= TREE_CONSTANT_OVERFLOW (yylval.ttype) = 0;
|
||
}
|
||
else
|
||
TREE_TYPE (yylval.ttype) = type;
|
||
}
|
||
|
||
UNGETC (c);
|
||
*p = 0;
|
||
|
||
if (ISALNUM (c) || c == '.' || c == '_'
|
||
|| (!flag_traditional && (c == '-' || c == '+')
|
||
&& (p[-1] == 'e' || p[-1] == 'E')))
|
||
error ("missing white space after number `%s'", token_buffer);
|
||
|
||
value = CONSTANT; break;
|
||
}
|
||
|
||
case '\'':
|
||
char_constant:
|
||
{
|
||
register int result = 0;
|
||
register int num_chars = 0;
|
||
int chars_seen = 0;
|
||
unsigned width = TYPE_PRECISION (char_type_node);
|
||
int max_chars;
|
||
|
||
max_chars = TYPE_PRECISION (integer_type_node) / width;
|
||
if (wide_flag)
|
||
width = WCHAR_TYPE_SIZE;
|
||
|
||
while (1)
|
||
{
|
||
tryagain:
|
||
c = GETC();
|
||
|
||
if (c == '\'' || c == EOF)
|
||
break;
|
||
|
||
++chars_seen;
|
||
if (c == '\\')
|
||
{
|
||
int ignore = 0;
|
||
c = readescape (&ignore);
|
||
if (ignore)
|
||
goto tryagain;
|
||
if (width < HOST_BITS_PER_INT
|
||
&& (unsigned) c >= ((unsigned)1 << width))
|
||
pedwarn ("escape sequence out of range for character");
|
||
}
|
||
else if (c == '\n')
|
||
{
|
||
if (pedantic)
|
||
pedwarn ("ANSI C forbids newline in character constant");
|
||
lineno++;
|
||
}
|
||
|
||
if (wide_flag)
|
||
{
|
||
if (chars_seen == 1) /* only keep the first one */
|
||
result = c;
|
||
goto tryagain;
|
||
}
|
||
|
||
/* Merge character into result; ignore excess chars. */
|
||
num_chars += (width / TYPE_PRECISION (char_type_node));
|
||
if (num_chars < max_chars + 1)
|
||
{
|
||
if (width < HOST_BITS_PER_INT)
|
||
result = (result << width) | (c & ((1 << width) - 1));
|
||
else
|
||
result = c;
|
||
}
|
||
}
|
||
|
||
if (c != '\'')
|
||
error ("malformatted character constant");
|
||
else if (chars_seen == 0)
|
||
error ("empty character constant");
|
||
else if (num_chars > max_chars)
|
||
{
|
||
num_chars = max_chars;
|
||
error ("character constant too long");
|
||
}
|
||
else if (chars_seen != 1 && ! flag_traditional && warn_multichar)
|
||
warning ("multi-character character constant");
|
||
|
||
/* If char type is signed, sign-extend the constant. */
|
||
if (! wide_flag)
|
||
{
|
||
int num_bits = num_chars * width;
|
||
if (num_bits == 0)
|
||
/* We already got an error; avoid invalid shift. */
|
||
yylval.ttype = build_int_2 (0, 0);
|
||
else if (TREE_UNSIGNED (char_type_node)
|
||
|| ((result >> (num_bits - 1)) & 1) == 0)
|
||
yylval.ttype
|
||
= build_int_2 (result & (~(HOST_WIDE_UINT) 0
|
||
>> (HOST_BITS_PER_WIDE_INT - num_bits)),
|
||
0);
|
||
else
|
||
yylval.ttype
|
||
= build_int_2 (result | ~(~(HOST_WIDE_UINT) 0
|
||
>> (HOST_BITS_PER_WIDE_INT - num_bits)),
|
||
-1);
|
||
TREE_TYPE (yylval.ttype) = integer_type_node;
|
||
}
|
||
else
|
||
{
|
||
yylval.ttype = build_int_2 (result, 0);
|
||
TREE_TYPE (yylval.ttype) = wchar_type_node;
|
||
}
|
||
|
||
value = CONSTANT;
|
||
break;
|
||
}
|
||
|
||
case '"':
|
||
string_constant:
|
||
{
|
||
unsigned width = wide_flag ? WCHAR_TYPE_SIZE
|
||
: TYPE_PRECISION (char_type_node);
|
||
c = GETC ();
|
||
p = token_buffer + 1;
|
||
|
||
while (c != '"' && c >= 0)
|
||
{
|
||
if (c == '\\')
|
||
{
|
||
int ignore = 0;
|
||
c = readescape (&ignore);
|
||
if (ignore)
|
||
goto skipnewline;
|
||
if (width < HOST_BITS_PER_INT
|
||
&& (unsigned) c >= ((unsigned)1 << width))
|
||
pedwarn ("escape sequence out of range for character");
|
||
}
|
||
else if (c == '\n')
|
||
{
|
||
if (pedantic)
|
||
pedwarn ("ANSI C forbids newline in string constant");
|
||
lineno++;
|
||
}
|
||
|
||
/* Add this single character into the buffer either as a wchar_t
|
||
or as a single byte. */
|
||
if (wide_flag)
|
||
{
|
||
unsigned width = TYPE_PRECISION (char_type_node);
|
||
unsigned bytemask = (1 << width) - 1;
|
||
int byte;
|
||
|
||
if (p + WCHAR_BYTES > token_buffer + maxtoken)
|
||
p = extend_token_buffer (p);
|
||
|
||
for (byte = 0; byte < WCHAR_BYTES; ++byte)
|
||
{
|
||
int value;
|
||
if (byte >= (int) sizeof (c))
|
||
value = 0;
|
||
else
|
||
value = (c >> (byte * width)) & bytemask;
|
||
p[byte] = value;
|
||
}
|
||
p += WCHAR_BYTES;
|
||
}
|
||
else
|
||
{
|
||
if (p >= token_buffer + maxtoken)
|
||
p = extend_token_buffer (p);
|
||
*p++ = c;
|
||
}
|
||
|
||
skipnewline:
|
||
c = GETC ();
|
||
}
|
||
|
||
/* Terminate the string value, either with a single byte zero
|
||
or with a wide zero. */
|
||
if (wide_flag)
|
||
{
|
||
if (p + WCHAR_BYTES > token_buffer + maxtoken)
|
||
p = extend_token_buffer (p);
|
||
zero_memory (p, WCHAR_BYTES);
|
||
p += WCHAR_BYTES;
|
||
}
|
||
else
|
||
{
|
||
if (p >= token_buffer + maxtoken)
|
||
p = extend_token_buffer (p);
|
||
*p++ = 0;
|
||
}
|
||
|
||
if (c < 0)
|
||
error ("Unterminated string constant");
|
||
|
||
/* We have read the entire constant.
|
||
Construct a STRING_CST for the result. */
|
||
|
||
if (wide_flag)
|
||
{
|
||
yylval.ttype = build_string (p - (token_buffer + 1),
|
||
token_buffer + 1);
|
||
TREE_TYPE (yylval.ttype) = wchar_array_type_node;
|
||
value = STRING;
|
||
}
|
||
else
|
||
{
|
||
yylval.ttype = build_string (p - (token_buffer + 1),
|
||
token_buffer + 1);
|
||
TREE_TYPE (yylval.ttype) = char_array_type_node;
|
||
value = STRING;
|
||
}
|
||
|
||
break;
|
||
}
|
||
|
||
case '+':
|
||
case '-':
|
||
case '&':
|
||
case '|':
|
||
case ':':
|
||
case '<':
|
||
case '>':
|
||
case '*':
|
||
case '/':
|
||
case '%':
|
||
case '^':
|
||
case '!':
|
||
case '=':
|
||
{
|
||
register int c1;
|
||
|
||
combine:
|
||
|
||
switch (c)
|
||
{
|
||
case '+':
|
||
yylval.code = PLUS_EXPR; break;
|
||
case '-':
|
||
yylval.code = MINUS_EXPR; break;
|
||
case '&':
|
||
yylval.code = BIT_AND_EXPR; break;
|
||
case '|':
|
||
yylval.code = BIT_IOR_EXPR; break;
|
||
case '*':
|
||
yylval.code = MULT_EXPR; break;
|
||
case '/':
|
||
yylval.code = TRUNC_DIV_EXPR; break;
|
||
case '%':
|
||
yylval.code = TRUNC_MOD_EXPR; break;
|
||
case '^':
|
||
yylval.code = BIT_XOR_EXPR; break;
|
||
case LSHIFT:
|
||
yylval.code = LSHIFT_EXPR; break;
|
||
case RSHIFT:
|
||
yylval.code = RSHIFT_EXPR; break;
|
||
case '<':
|
||
yylval.code = LT_EXPR; break;
|
||
case '>':
|
||
yylval.code = GT_EXPR; break;
|
||
}
|
||
|
||
token_buffer[1] = c1 = GETC();
|
||
token_buffer[2] = 0;
|
||
|
||
if (c1 == '=')
|
||
{
|
||
switch (c)
|
||
{
|
||
case '<':
|
||
value = ARITHCOMPARE; yylval.code = LE_EXPR; goto done;
|
||
case '>':
|
||
value = ARITHCOMPARE; yylval.code = GE_EXPR; goto done;
|
||
case '!':
|
||
value = EQCOMPARE; yylval.code = NE_EXPR; goto done;
|
||
case '=':
|
||
value = EQCOMPARE; yylval.code = EQ_EXPR; goto done;
|
||
}
|
||
value = ASSIGN; goto done;
|
||
}
|
||
else if (c == c1)
|
||
switch (c)
|
||
{
|
||
case '+':
|
||
value = PLUSPLUS; goto done;
|
||
case '-':
|
||
value = MINUSMINUS; goto done;
|
||
case '&':
|
||
value = ANDAND; goto done;
|
||
case '|':
|
||
value = OROR; goto done;
|
||
case '<':
|
||
c = LSHIFT;
|
||
goto combine;
|
||
case '>':
|
||
c = RSHIFT;
|
||
goto combine;
|
||
}
|
||
else
|
||
switch (c)
|
||
{
|
||
case '-':
|
||
if (c1 == '>')
|
||
{ value = POINTSAT; goto done; }
|
||
break;
|
||
case ':':
|
||
if (c1 == '>')
|
||
{ value = ']'; goto done; }
|
||
break;
|
||
case '<':
|
||
if (c1 == '%')
|
||
{ value = '{'; indent_level++; goto done; }
|
||
if (c1 == ':')
|
||
{ value = '['; goto done; }
|
||
break;
|
||
case '%':
|
||
if (c1 == '>')
|
||
{ value = '}'; indent_level--; goto done; }
|
||
break;
|
||
}
|
||
UNGETC (c1);
|
||
token_buffer[1] = 0;
|
||
|
||
if ((c == '<') || (c == '>'))
|
||
value = ARITHCOMPARE;
|
||
else value = c;
|
||
goto done;
|
||
}
|
||
|
||
case 0:
|
||
/* Don't make yyparse think this is eof. */
|
||
value = 1;
|
||
break;
|
||
|
||
case '{':
|
||
indent_level++;
|
||
value = c;
|
||
break;
|
||
|
||
case '}':
|
||
indent_level--;
|
||
value = c;
|
||
break;
|
||
|
||
default:
|
||
value = c;
|
||
}
|
||
|
||
done:
|
||
/* yylloc.last_line = lineno; */
|
||
|
||
return value;
|
||
}
|
||
|
||
/* Sets the value of the 'yydebug' variable to VALUE.
|
||
This is a function so we don't have to have YYDEBUG defined
|
||
in order to build the compiler. */
|
||
|
||
void
|
||
set_yydebug (value)
|
||
int value;
|
||
{
|
||
yydebug = value;
|
||
}
|