diff options
Diffstat (limited to 'contrib/gcc/c-lex.c')
| -rw-r--r-- | contrib/gcc/c-lex.c | 2350 |
1 files changed, 0 insertions, 2350 deletions
diff --git a/contrib/gcc/c-lex.c b/contrib/gcc/c-lex.c deleted file mode 100644 index 27c65f3fa27f2..0000000000000 --- a/contrib/gcc/c-lex.c +++ /dev/null @@ -1,2350 +0,0 @@ -/* 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 "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 "c-pragma.h" -#include "toplev.h" -#include "intl.h" - -/* MULTIBYTE_CHARS support only works for native compilers. - ??? Ideally what we want is to model widechar support after - the current floating point support. */ -#ifdef CROSS_COMPILE -#undef MULTIBYTE_CHARS -#endif - -#ifdef MULTIBYTE_CHARS -#include "mbchar.h" -#include <locale.h> -#endif /* MULTIBYTE_CHARS */ - -#if USE_CPPLIB -#include "cpplib.h" -extern cpp_reader parse_in; -extern cpp_options parse_options; -#else -/* Stream for reading from the input file. */ -FILE *finput; -#endif - -extern void yyprint PROTO((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 - -#if USE_CPPLIB -extern unsigned char *yy_cur, *yy_lim; - -extern int yy_get_token (); - -#define GETC() (yy_cur < yy_lim ? *yy_cur++ : yy_get_token ()) -#define UNGETC(c) ((c) == EOF ? 0 : yy_cur--) -#else -#define GETC() getc (finput) -#define UNGETC(c) ungetc (c, finput) -#endif - -/* 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; - -/* Nonzero enables objc features. */ - -int doing_objc_thang; - -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. - This is not static because objc-parse.y uses it. */ - -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; - -#if !USE_CPPLIB -/* Buffered-back input character; faster than using ungetc. */ -static int nextchar = -1; -#endif - -#ifdef HANDLE_GENERIC_PRAGMAS -static int handle_generic_pragma PROTO((int)); -#endif /* HANDLE_GENERIC_PRAGMAS */ -static int whitespace_cr PROTO((int)); -static int skip_white_space PROTO((int)); -static int skip_white_space_on_line PROTO((void)); -static char *extend_token_buffer PROTO((const char *)); -static int readescape PROTO((int *)); -static void parse_float PROTO((PTR)); - -/* 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; -{ -#if !USE_CPPLIB - /* Open input file. */ - if (filename == 0 || !strcmp (filename, "-")) - { - finput = stdin; - filename = "stdin"; - } - else - finput = fopen (filename, "r"); - if (finput == 0) - pfatal_with_name (filename); - -#ifdef IO_BUFFER_SIZE - setvbuf (finput, (char *) xmalloc (IO_BUFFER_SIZE), _IOFBF, IO_BUFFER_SIZE); -#endif -#else /* !USE_CPPLIB */ - parse_in.show_column = 1; - if (! cpp_start_read (&parse_in, filename)) - abort (); - - if (filename == 0 || !strcmp (filename, "-")) - filename = "stdin"; - - /* cpp_start_read always puts at least one line directive into the - token buffer. We must arrange to read it out here. */ - yy_cur = parse_in.token_buffer; - yy_lim = CPP_PWRITTEN (&parse_in); -#endif - - init_lex (); - - return filename; -} - -void -finish_parse () -{ -#if USE_CPPLIB - cpp_finish (&parse_in); -#else - fclose (finput); -#endif -} - -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; - -#ifdef MULTIBYTE_CHARS - /* Change to the native locale for multibyte conversions. */ - setlocale (LC_CTYPE, ""); - literal_codeset = getenv ("LANG"); -#endif - - 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) - - if (! doing_objc_thang) - 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, -#if HOST_BITS_PER_WIDE_INT == 64 -#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_INT - " 0x%x%016x", -#else -#if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG - " 0x%lx%016lx", -#else - " 0x%llx%016llx", -#endif -#endif -#else -#if HOST_BITS_PER_WIDE_INT != HOST_BITS_PER_INT - " 0x%lx%08lx", -#else - " 0x%x%08x", -#endif -#endif - 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. - Must use and reset nextchar if it has the next character. */ - -void -position_after_white_space () -{ - register int c; - -#if !USE_CPPLIB - if (nextchar != -1) - c = nextchar, nextchar = -1; - else -#endif - 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) - const char *p; -{ - int offset = p - token_buffer; - - maxtoken = maxtoken * 2 + 10; - token_buffer = (char *) xrealloc (token_buffer, maxtoken + 2); - - return token_buffer + offset; -} - -#if defined HANDLE_PRAGMA -/* Local versions of these macros, that can be passed as function pointers. */ -static int -pragma_getc () -{ - return GETC(); -} - -static void -pragma_ungetc (arg) - int arg; -{ - UNGETC (arg); -} -#endif - -/* 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', `ident', `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) )) - { - while (c == ' ' || c == '\t' || whitespace_cr (c)) - c = GETC (); - if (c == '\n') - return c; - -#if defined HANDLE_PRAGMA || defined HANDLE_GENERIC_PRAGMAS - UNGETC (c); - token = yylex (); - if (token != IDENTIFIER) - goto skipline; -#endif /* HANDLE_PRAGMA || HANDLE_GENERIC_PRAGMAS */ - -#ifdef HANDLE_PRAGMA - /* We invoke HANDLE_PRAGMA before HANDLE_GENERIC_PRAGMAS (if - both are defined), in order to give the back end a chance to - override the interpretation of generic style pragmas. */ -#if !USE_CPPLIB - if (nextchar >= 0) - { - c = nextchar, nextchar = -1; - UNGETC (c); - } -#endif /* !USE_CPPLIB */ - - if (TREE_CODE (yylval.ttype) != IDENTIFIER_NODE) - goto skipline; - - if (HANDLE_PRAGMA (pragma_getc, pragma_ungetc, - IDENTIFIER_POINTER (yylval.ttype))) - return GETC (); -#endif /* HANDLE_PRAGMA */ - -#ifdef HANDLE_GENERIC_PRAGMAS - if (handle_generic_pragma (token)) - return GETC (); -#endif /* HANDLE_GENERIC_PRAGMAS */ - - /* Issue a warning message if we have been asked to do so. - Ignoring unknown pragmas in system header file unless - an explcit -Wunknown-pragmas has been given. */ - if (warn_unknown_pragmas > 1 - || (warn_unknown_pragmas && ! in_system_header)) - warning ("ignoring pragma: %s", token_buffer); - - 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; - } - else if (c == 'i') - { - if (GETC() == 'd' - && GETC() == 'e' - && GETC() == 'n' - && GETC() == 't' - && ((c = GETC()) == ' ' || c == '\t')) - { - /* #ident. The pedantic warning is now in cccp.c. */ - - /* Here we have just seen `#ident '. - A string constant should follow. */ - - c = skip_white_space_on_line (); - - /* If no argument, ignore the line. */ - if (c == '\n') - return c; - - UNGETC (c); - token = yylex (); - if (token != STRING - || TREE_CODE (yylval.ttype) != STRING_CST) - { - error ("invalid #ident"); - goto skipline; - } - - if (!flag_no_ident) - { -#ifdef ASM_OUTPUT_IDENT - ASM_OUTPUT_IDENT (asm_out_file, TREE_STRING_POINTER (yylval.ttype)); -#endif - } - - /* Skip the rest of this line. */ - goto skipline; - } - } - - 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: -#if !USE_CPPLIB - if (c != '\n' && c != EOF && nextchar >= 0) - c = nextchar, nextchar = -1; -#endif - while (c != '\n' && c != EOF) - c = GETC(); - return c; -} - -#ifdef HANDLE_GENERIC_PRAGMAS - -/* Handle a #pragma directive. - TOKEN is the token we read after `#pragma'. Processes the entire input - line and return non-zero iff the pragma has been successfully parsed. */ - -/* This function has to be in this file, in order to get at - the token types. */ - -static int -handle_generic_pragma (token) - register int token; -{ - register int c; - - for (;;) - { - switch (token) - { - case IDENTIFIER: - case TYPENAME: - case STRING: - case CONSTANT: - handle_pragma_token (token_buffer, yylval.ttype); - break; - default: - handle_pragma_token (token_buffer, NULL); - } -#if !USE_CPPLIB - if (nextchar >= 0) - c = nextchar, nextchar = -1; - else -#endif - c = GETC (); - - while (c == ' ' || c == '\t') - c = GETC (); - UNGETC (c); - - if (c == '\n' || c == EOF) - return handle_pragma_token (NULL, NULL); - - token = yylex (); - } -} - -#endif /* HANDLE_GENERIC_PRAGMAS */ - -#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 (msgid) - const char *msgid; -{ - const char *string = _(msgid); - - /* We can't print string and character constants well - because the token_buffer contains the result of processing escapes. */ - if (end_of_file) - error ("%s at end of input", string); - else if (token_buffer[0] == 0) - error ("%s at null character", string); - else if (token_buffer[0] == '"') - error ("%s before string constant", string); - else if (token_buffer[0] == '\'') - error ("%s before character constant", string); - else if (token_buffer[0] < 040 || (unsigned char) token_buffer[0] >= 0177) - error ("%s before character 0%o", string, (unsigned char) token_buffer[0]); - else - error ("%s before `%s'", string, 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 */ - -struct pf_args -{ - /* Input */ - int base; - char * p; - /* I/O */ - int c; - int imag; - tree type; - int conversion_errno; - /* Output */ - REAL_VALUE_TYPE value; -}; - -static void -parse_float (data) - PTR data; -{ - struct pf_args * args = (struct pf_args *) data; - 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 (args->p - token_buffer + 1); - bcopy (token_buffer, copy, args->p - token_buffer + 1); - - while (1) - { - int lose = 0; - - /* Read the suffixes to choose a data type. */ - switch (args->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 (args->imag) - error ("more than one `i' or `j' in numeric constant"); - else if (pedantic) - pedwarn ("ANSI C forbids imaginary numeric constants"); - args->imag = 1; - break; - - default: - lose = 1; - } - - if (lose) - break; - - if (args->p >= token_buffer + maxtoken - 3) - args->p = extend_token_buffer (args->p); - *(args->p++) = args->c; - *(args->p) = 0; - args->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"); - - args->type = float_type_node; - errno = 0; - if (args->base == 16) - args->value = REAL_VALUE_HTOF (copy, TYPE_MODE (args->type)); - else - args->value = REAL_VALUE_ATOF (copy, TYPE_MODE (args->type)); - args->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 (args->value) && pedantic) - warning ("floating point number exceeds range of `float'"); - } - else if (lflag) - { - args->type = long_double_type_node; - errno = 0; - if (args->base == 16) - args->value = REAL_VALUE_HTOF (copy, TYPE_MODE (args->type)); - else - args->value = REAL_VALUE_ATOF (copy, TYPE_MODE (args->type)); - args->conversion_errno = errno; - if (REAL_VALUE_ISINF (args->value) && pedantic) - warning ("floating point number exceeds range of `long double'"); - } - else - { - errno = 0; - if (args->base == 16) - args->value = REAL_VALUE_HTOF (copy, TYPE_MODE (args->type)); - else - args->value = REAL_VALUE_ATOF (copy, TYPE_MODE (args->type)); - args->conversion_errno = errno; - if (REAL_VALUE_ISINF (args->value) && pedantic) - warning ("floating point number exceeds range of `double'"); - } -} - -int -yylex () -{ - register int c; - register char *p; - register int value; - int wide_flag = 0; - int objc_flag = 0; - -#if !USE_CPPLIB - if (nextchar >= 0) - c = nextchar, nextchar = -1; - else -#endif - 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 '@': - if (!doing_objc_thang) - { - value = c; - break; - } - else - { - /* '@' may start a constant string object. */ - register int c = GETC (); - if (c == '"') - { - objc_flag = 1; - goto string_constant; - } - UNGETC (c); - /* Fall through to treat '@' as the start of an identifier. */ - } - - 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 '_': - case '$': - letter: - p = token_buffer; - while (ISALNUM (c) || c == '_' || c == '$' || c == '@') - { - /* Make sure this char really belongs in an identifier. */ - if (c == '$') - { - if (! dollars_in_ident) - error ("`$' in identifier"); - else if (pedantic) - pedwarn ("`$' in identifier"); - } - - if (p >= token_buffer + maxtoken) - p = extend_token_buffer (p); - - *p++ = c; - c = GETC(); - } - - *p = 0; -#if USE_CPPLIB - UNGETC (c); -#else - nextchar = c; -#endif - - 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; - - /* Only return OBJECTNAME if it is a typedef. */ - if (doing_objc_thang && value == OBJECTNAME) - { - lastiddecl = lookup_name(yylval.ttype); - - if (lastiddecl == NULL_TREE - || TREE_CODE (lastiddecl) != TYPE_DECL) - value = IDENTIFIER; - } - - /* 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; - } - else if (doing_objc_thang) - { - tree objc_interface_decl = is_class_name (yylval.ttype); - - if (objc_interface_decl) - { - value = CLASSNAME; - yylval.ttype = objc_interface_decl; - } - } - } - - 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; - struct pf_args args; - - /* 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; - - /* Setup input for parse_float() */ - args.base = base; - args.p = p; - args.c = c; - args.imag = imag; - args.type = type; - args.conversion_errno = conversion_errno; - - /* Convert string to a double, checking for overflow. */ - if (do_float_handler (parse_float, (PTR) &args)) - { - /* Receive output from parse_float() */ - value = args.value; - } - else - { - /* We got an exception from parse_float() */ - error ("floating constant out of range"); - value = dconst0; - } - - /* Receive output from parse_float() */ - c = args.c; - imag = args.imag; - type = args.type; - conversion_errno = args.conversion_errno; - -#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 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 it won't fit in the host's representation for integers, - then pedwarn. */ - - warn = overflow; - 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))) - { - warn = 1; - 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; - - - /* If it's still an integer (not a complex), and it doesn't - fit in the type we choose for it, then pedwarn. */ - - if (! warn - && TREE_CODE (TREE_TYPE (yylval.ttype)) == INTEGER_TYPE - && ! int_fits_type_p (yylval.ttype, TREE_TYPE (yylval.ttype))) - pedwarn ("integer constant out of range"); - } - - UNGETC (c); - *p = 0; - - if (ISALNUM (c) || 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; -#ifdef MULTIBYTE_CHARS - int longest_char = local_mb_cur_max (); - (void) local_mbtowc (NULL_PTR, NULL_PTR, 0); -#endif - - 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"); -#ifdef MAP_CHARACTER - if (ISPRINT (c)) - c = MAP_CHARACTER (c); -#endif - } - else if (c == '\n') - { - if (pedantic) - pedwarn ("ANSI C forbids newline in character constant"); - lineno++; - } - else - { -#ifdef MULTIBYTE_CHARS - wchar_t wc; - int i; - int char_len = -1; - for (i = 1; i <= longest_char; ++i) - { - if (i > maxtoken - 4) - extend_token_buffer (token_buffer); - - token_buffer[i] = c; - char_len = local_mbtowc (& wc, - token_buffer + 1, - i); - if (char_len != -1) - break; - c = GETC (); - } - if (char_len > 1) - { - /* mbtowc sometimes needs an extra char before accepting */ - if (char_len < i) - UNGETC (c); - if (! wide_flag) - { - /* Merge character into result; ignore excess chars. */ - for (i = 1; i <= char_len; ++i) - { - if (i > max_chars) - break; - if (width < HOST_BITS_PER_INT) - result = (result << width) - | (token_buffer[i] - & ((1 << width) - 1)); - else - result = token_buffer[i]; - } - num_chars += char_len; - goto tryagain; - } - c = wc; - } - else - { - if (char_len == -1) - warning ("Ignoring invalid multibyte character"); - if (wide_flag) - c = wc; -#ifdef MAP_CHARACTER - else - c = MAP_CHARACTER (c); -#endif - } -#else /* ! MULTIBYTE_CHARS */ -#ifdef MAP_CHARACTER - c = MAP_CHARACTER (c); -#endif -#endif /* ! MULTIBYTE_CHARS */ - } - - 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 & (~(unsigned HOST_WIDE_INT) 0 - >> (HOST_BITS_PER_WIDE_INT - num_bits)), - 0); - else - yylval.ttype - = build_int_2 (result | ~(~(unsigned HOST_WIDE_INT) 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); -#ifdef MULTIBYTE_CHARS - int longest_char = local_mb_cur_max (); - (void) local_mbtowc (NULL_PTR, NULL_PTR, 0); -#endif - 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++; - } - else - { -#ifdef MULTIBYTE_CHARS - wchar_t wc; - int i; - int char_len = -1; - for (i = 0; i < longest_char; ++i) - { - if (p + i >= token_buffer + maxtoken) - p = extend_token_buffer (p); - p[i] = c; - - char_len = local_mbtowc (& wc, p, i + 1); - if (char_len != -1) - break; - c = GETC (); - } - if (char_len == -1) - warning ("Ignoring invalid multibyte character"); - else - { - /* mbtowc sometimes needs an extra char before accepting */ - if (char_len <= i) - UNGETC (c); - if (! wide_flag) - { - p += (i + 1); - c = GETC (); - continue; - } - c = wc; - } -#endif /* MULTIBYTE_CHARS */ - } - - /* 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; - if (BYTES_BIG_ENDIAN) - p[WCHAR_BYTES - byte - 1] = value; - else - 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); - bzero (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 if (objc_flag) - { - /* Return an Objective-C @"..." constant string object. */ - yylval.ttype = build_objc_string (p - (token_buffer + 1), - token_buffer + 1); - TREE_TYPE (yylval.ttype) = char_array_type_node; - value = OBJC_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; -{ -#if YYDEBUG != 0 - yydebug = value; -#else - warning ("YYDEBUG not defined."); -#endif -} |