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bd49c137fe
(yylex): Add code to scan exponentiation operator. * eval.c (evaluate_subexp_standard): Add support for BINOP_EXP. * valarith.c (value_binop): Reset errno to 0 before calling pow to do exponentiation operation.
1193 lines
29 KiB
Plaintext
1193 lines
29 KiB
Plaintext
/* YACC parser for Fortran expressions, for GDB.
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Copyright 1986, 1989, 1990, 1991, 1993, 1994, 1995, 1996, 2000, 2001,
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2002, 2003, 2004, 2005 Free Software Foundation, Inc.
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Contributed by Motorola. Adapted from the C parser by Farooq Butt
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(fmbutt@engage.sps.mot.com).
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This was blantantly ripped off the C expression parser, please
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be aware of that as you look at its basic structure -FMB */
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/* Parse a F77 expression from text in a string,
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and return the result as a struct expression pointer.
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That structure contains arithmetic operations in reverse polish,
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with constants represented by operations that are followed by special data.
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See expression.h for the details of the format.
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What is important here is that it can be built up sequentially
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during the process of parsing; the lower levels of the tree always
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come first in the result.
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Note that malloc's and realloc's in this file are transformed to
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xmalloc and xrealloc respectively by the same sed command in the
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makefile that remaps any other malloc/realloc inserted by the parser
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generator. Doing this with #defines and trying to control the interaction
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with include files (<malloc.h> and <stdlib.h> for example) just became
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too messy, particularly when such includes can be inserted at random
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times by the parser generator. */
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%{
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#include "defs.h"
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#include "gdb_string.h"
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#include "expression.h"
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#include "value.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "f-lang.h"
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#include "bfd.h" /* Required by objfiles.h. */
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#include "symfile.h" /* Required by objfiles.h. */
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#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
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#include "block.h"
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#include <ctype.h>
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/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
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as well as gratuitiously global symbol names, so we can have multiple
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yacc generated parsers in gdb. Note that these are only the variables
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produced by yacc. If other parser generators (bison, byacc, etc) produce
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additional global names that conflict at link time, then those parser
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generators need to be fixed instead of adding those names to this list. */
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#define yymaxdepth f_maxdepth
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#define yyparse f_parse
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#define yylex f_lex
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#define yyerror f_error
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#define yylval f_lval
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#define yychar f_char
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#define yydebug f_debug
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#define yypact f_pact
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#define yyr1 f_r1
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#define yyr2 f_r2
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#define yydef f_def
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#define yychk f_chk
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#define yypgo f_pgo
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#define yyact f_act
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#define yyexca f_exca
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#define yyerrflag f_errflag
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#define yynerrs f_nerrs
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#define yyps f_ps
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#define yypv f_pv
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#define yys f_s
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#define yy_yys f_yys
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#define yystate f_state
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#define yytmp f_tmp
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#define yyv f_v
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#define yy_yyv f_yyv
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#define yyval f_val
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#define yylloc f_lloc
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#define yyreds f_reds /* With YYDEBUG defined */
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#define yytoks f_toks /* With YYDEBUG defined */
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#define yyname f_name /* With YYDEBUG defined */
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#define yyrule f_rule /* With YYDEBUG defined */
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#define yylhs f_yylhs
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#define yylen f_yylen
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#define yydefred f_yydefred
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#define yydgoto f_yydgoto
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#define yysindex f_yysindex
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#define yyrindex f_yyrindex
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#define yygindex f_yygindex
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#define yytable f_yytable
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#define yycheck f_yycheck
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#ifndef YYDEBUG
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#define YYDEBUG 1 /* Default to yydebug support */
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#endif
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#define YYFPRINTF parser_fprintf
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int yyparse (void);
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static int yylex (void);
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void yyerror (char *);
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static void growbuf_by_size (int);
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static int match_string_literal (void);
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%}
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/* Although the yacc "value" of an expression is not used,
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since the result is stored in the structure being created,
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other node types do have values. */
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%union
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{
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LONGEST lval;
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struct {
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LONGEST val;
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struct type *type;
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} typed_val;
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DOUBLEST dval;
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struct symbol *sym;
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struct type *tval;
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struct stoken sval;
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struct ttype tsym;
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struct symtoken ssym;
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int voidval;
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struct block *bval;
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enum exp_opcode opcode;
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struct internalvar *ivar;
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struct type **tvec;
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int *ivec;
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}
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%{
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/* YYSTYPE gets defined by %union */
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static int parse_number (char *, int, int, YYSTYPE *);
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%}
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%type <voidval> exp type_exp start variable
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%type <tval> type typebase
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%type <tvec> nonempty_typelist
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/* %type <bval> block */
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/* Fancy type parsing. */
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%type <voidval> func_mod direct_abs_decl abs_decl
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%type <tval> ptype
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%token <typed_val> INT
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%token <dval> FLOAT
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/* Both NAME and TYPENAME tokens represent symbols in the input,
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and both convey their data as strings.
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But a TYPENAME is a string that happens to be defined as a typedef
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or builtin type name (such as int or char)
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and a NAME is any other symbol.
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Contexts where this distinction is not important can use the
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nonterminal "name", which matches either NAME or TYPENAME. */
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%token <sval> STRING_LITERAL
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%token <lval> BOOLEAN_LITERAL
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%token <ssym> NAME
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%token <tsym> TYPENAME
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%type <ssym> name_not_typename
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/* A NAME_OR_INT is a symbol which is not known in the symbol table,
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but which would parse as a valid number in the current input radix.
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E.g. "c" when input_radix==16. Depending on the parse, it will be
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turned into a name or into a number. */
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%token <ssym> NAME_OR_INT
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%token SIZEOF
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%token ERROR
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/* Special type cases, put in to allow the parser to distinguish different
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legal basetypes. */
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%token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD
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%token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD
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%token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD
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%token BOOL_AND BOOL_OR BOOL_NOT
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%token <lval> CHARACTER
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%token <voidval> VARIABLE
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%token <opcode> ASSIGN_MODIFY
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%left ','
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%left ABOVE_COMMA
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%right '=' ASSIGN_MODIFY
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%right '?'
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%left BOOL_OR
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%right BOOL_NOT
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%left BOOL_AND
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%left '|'
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%left '^'
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%left '&'
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%left EQUAL NOTEQUAL
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%left LESSTHAN GREATERTHAN LEQ GEQ
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%left LSH RSH
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%left '@'
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%left '+' '-'
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%left '*' '/' '%'
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%right STARSTAR
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%right UNARY
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%right '('
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%%
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start : exp
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| type_exp
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;
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type_exp: type
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{ write_exp_elt_opcode(OP_TYPE);
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write_exp_elt_type($1);
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write_exp_elt_opcode(OP_TYPE); }
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;
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exp : '(' exp ')'
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{ }
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;
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/* Expressions, not including the comma operator. */
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exp : '*' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_IND); }
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;
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exp : '&' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_ADDR); }
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;
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exp : '-' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_NEG); }
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;
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exp : BOOL_NOT exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
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;
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exp : '~' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_COMPLEMENT); }
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;
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exp : SIZEOF exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_SIZEOF); }
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;
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/* No more explicit array operators, we treat everything in F77 as
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a function call. The disambiguation as to whether we are
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doing a subscript operation or a function call is done
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later in eval.c. */
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exp : exp '('
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{ start_arglist (); }
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arglist ')'
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{ write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST);
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write_exp_elt_longcst ((LONGEST) end_arglist ());
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write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST); }
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;
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arglist :
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;
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arglist : exp
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{ arglist_len = 1; }
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;
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arglist : substring
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{ arglist_len = 2;}
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;
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arglist : arglist ',' exp %prec ABOVE_COMMA
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{ arglist_len++; }
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;
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substring: exp ':' exp %prec ABOVE_COMMA
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{ }
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;
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complexnum: exp ',' exp
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{ }
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;
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exp : '(' complexnum ')'
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{ write_exp_elt_opcode(OP_COMPLEX); }
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;
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exp : '(' type ')' exp %prec UNARY
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{ write_exp_elt_opcode (UNOP_CAST);
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write_exp_elt_type ($2);
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write_exp_elt_opcode (UNOP_CAST); }
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;
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/* Binary operators in order of decreasing precedence. */
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exp : exp '@' exp
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{ write_exp_elt_opcode (BINOP_REPEAT); }
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;
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exp : exp STARSTAR exp
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{ write_exp_elt_opcode (BINOP_EXP); }
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;
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exp : exp '*' exp
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{ write_exp_elt_opcode (BINOP_MUL); }
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;
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exp : exp '/' exp
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{ write_exp_elt_opcode (BINOP_DIV); }
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;
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exp : exp '%' exp
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{ write_exp_elt_opcode (BINOP_REM); }
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;
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exp : exp '+' exp
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{ write_exp_elt_opcode (BINOP_ADD); }
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;
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exp : exp '-' exp
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{ write_exp_elt_opcode (BINOP_SUB); }
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;
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exp : exp LSH exp
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{ write_exp_elt_opcode (BINOP_LSH); }
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;
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exp : exp RSH exp
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{ write_exp_elt_opcode (BINOP_RSH); }
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;
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exp : exp EQUAL exp
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{ write_exp_elt_opcode (BINOP_EQUAL); }
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;
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exp : exp NOTEQUAL exp
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{ write_exp_elt_opcode (BINOP_NOTEQUAL); }
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;
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exp : exp LEQ exp
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{ write_exp_elt_opcode (BINOP_LEQ); }
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;
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exp : exp GEQ exp
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{ write_exp_elt_opcode (BINOP_GEQ); }
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;
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exp : exp LESSTHAN exp
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{ write_exp_elt_opcode (BINOP_LESS); }
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;
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exp : exp GREATERTHAN exp
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{ write_exp_elt_opcode (BINOP_GTR); }
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;
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exp : exp '&' exp
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{ write_exp_elt_opcode (BINOP_BITWISE_AND); }
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;
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exp : exp '^' exp
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{ write_exp_elt_opcode (BINOP_BITWISE_XOR); }
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;
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exp : exp '|' exp
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{ write_exp_elt_opcode (BINOP_BITWISE_IOR); }
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;
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exp : exp BOOL_AND exp
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{ write_exp_elt_opcode (BINOP_LOGICAL_AND); }
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;
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exp : exp BOOL_OR exp
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{ write_exp_elt_opcode (BINOP_LOGICAL_OR); }
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;
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exp : exp '=' exp
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{ write_exp_elt_opcode (BINOP_ASSIGN); }
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;
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exp : exp ASSIGN_MODIFY exp
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{ write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
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write_exp_elt_opcode ($2);
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write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
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;
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exp : INT
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{ write_exp_elt_opcode (OP_LONG);
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write_exp_elt_type ($1.type);
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write_exp_elt_longcst ((LONGEST)($1.val));
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write_exp_elt_opcode (OP_LONG); }
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;
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exp : NAME_OR_INT
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{ YYSTYPE val;
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parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
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write_exp_elt_opcode (OP_LONG);
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write_exp_elt_type (val.typed_val.type);
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write_exp_elt_longcst ((LONGEST)val.typed_val.val);
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write_exp_elt_opcode (OP_LONG); }
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;
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exp : FLOAT
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{ write_exp_elt_opcode (OP_DOUBLE);
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write_exp_elt_type (builtin_type_f_real_s8);
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write_exp_elt_dblcst ($1);
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write_exp_elt_opcode (OP_DOUBLE); }
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;
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exp : variable
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;
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exp : VARIABLE
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;
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exp : SIZEOF '(' type ')' %prec UNARY
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{ write_exp_elt_opcode (OP_LONG);
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write_exp_elt_type (builtin_type_f_integer);
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CHECK_TYPEDEF ($3);
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write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
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write_exp_elt_opcode (OP_LONG); }
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;
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exp : BOOLEAN_LITERAL
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{ write_exp_elt_opcode (OP_BOOL);
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write_exp_elt_longcst ((LONGEST) $1);
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write_exp_elt_opcode (OP_BOOL);
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}
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;
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exp : STRING_LITERAL
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{
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write_exp_elt_opcode (OP_STRING);
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write_exp_string ($1);
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write_exp_elt_opcode (OP_STRING);
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}
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;
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variable: name_not_typename
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||
{ struct symbol *sym = $1.sym;
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||
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if (sym)
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||
{
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||
if (symbol_read_needs_frame (sym))
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||
{
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||
if (innermost_block == 0 ||
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contained_in (block_found,
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innermost_block))
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innermost_block = block_found;
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}
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write_exp_elt_opcode (OP_VAR_VALUE);
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/* We want to use the selected frame, not
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another more inner frame which happens to
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be in the same block. */
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write_exp_elt_block (NULL);
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write_exp_elt_sym (sym);
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write_exp_elt_opcode (OP_VAR_VALUE);
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break;
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||
}
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||
else
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||
{
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||
struct minimal_symbol *msymbol;
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char *arg = copy_name ($1.stoken);
|
||
|
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msymbol =
|
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lookup_minimal_symbol (arg, NULL, NULL);
|
||
if (msymbol != NULL)
|
||
{
|
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write_exp_msymbol (msymbol,
|
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lookup_function_type (builtin_type_int),
|
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builtin_type_int);
|
||
}
|
||
else if (!have_full_symbols () && !have_partial_symbols ())
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error ("No symbol table is loaded. Use the \"file\" command.");
|
||
else
|
||
error ("No symbol \"%s\" in current context.",
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||
copy_name ($1.stoken));
|
||
}
|
||
}
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||
;
|
||
|
||
|
||
type : ptype
|
||
;
|
||
|
||
ptype : typebase
|
||
| typebase abs_decl
|
||
{
|
||
/* This is where the interesting stuff happens. */
|
||
int done = 0;
|
||
int array_size;
|
||
struct type *follow_type = $1;
|
||
struct type *range_type;
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||
|
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while (!done)
|
||
switch (pop_type ())
|
||
{
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||
case tp_end:
|
||
done = 1;
|
||
break;
|
||
case tp_pointer:
|
||
follow_type = lookup_pointer_type (follow_type);
|
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break;
|
||
case tp_reference:
|
||
follow_type = lookup_reference_type (follow_type);
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break;
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case tp_array:
|
||
array_size = pop_type_int ();
|
||
if (array_size != -1)
|
||
{
|
||
range_type =
|
||
create_range_type ((struct type *) NULL,
|
||
builtin_type_f_integer, 0,
|
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array_size - 1);
|
||
follow_type =
|
||
create_array_type ((struct type *) NULL,
|
||
follow_type, range_type);
|
||
}
|
||
else
|
||
follow_type = lookup_pointer_type (follow_type);
|
||
break;
|
||
case tp_function:
|
||
follow_type = lookup_function_type (follow_type);
|
||
break;
|
||
}
|
||
$$ = follow_type;
|
||
}
|
||
;
|
||
|
||
abs_decl: '*'
|
||
{ push_type (tp_pointer); $$ = 0; }
|
||
| '*' abs_decl
|
||
{ push_type (tp_pointer); $$ = $2; }
|
||
| '&'
|
||
{ push_type (tp_reference); $$ = 0; }
|
||
| '&' abs_decl
|
||
{ push_type (tp_reference); $$ = $2; }
|
||
| direct_abs_decl
|
||
;
|
||
|
||
direct_abs_decl: '(' abs_decl ')'
|
||
{ $$ = $2; }
|
||
| direct_abs_decl func_mod
|
||
{ push_type (tp_function); }
|
||
| func_mod
|
||
{ push_type (tp_function); }
|
||
;
|
||
|
||
func_mod: '(' ')'
|
||
{ $$ = 0; }
|
||
| '(' nonempty_typelist ')'
|
||
{ free ($2); $$ = 0; }
|
||
;
|
||
|
||
typebase /* Implements (approximately): (type-qualifier)* type-specifier */
|
||
: TYPENAME
|
||
{ $$ = $1.type; }
|
||
| INT_KEYWORD
|
||
{ $$ = builtin_type_f_integer; }
|
||
| INT_S2_KEYWORD
|
||
{ $$ = builtin_type_f_integer_s2; }
|
||
| CHARACTER
|
||
{ $$ = builtin_type_f_character; }
|
||
| LOGICAL_KEYWORD
|
||
{ $$ = builtin_type_f_logical;}
|
||
| LOGICAL_S2_KEYWORD
|
||
{ $$ = builtin_type_f_logical_s2;}
|
||
| LOGICAL_S1_KEYWORD
|
||
{ $$ = builtin_type_f_logical_s1;}
|
||
| REAL_KEYWORD
|
||
{ $$ = builtin_type_f_real;}
|
||
| REAL_S8_KEYWORD
|
||
{ $$ = builtin_type_f_real_s8;}
|
||
| REAL_S16_KEYWORD
|
||
{ $$ = builtin_type_f_real_s16;}
|
||
| COMPLEX_S8_KEYWORD
|
||
{ $$ = builtin_type_f_complex_s8;}
|
||
| COMPLEX_S16_KEYWORD
|
||
{ $$ = builtin_type_f_complex_s16;}
|
||
| COMPLEX_S32_KEYWORD
|
||
{ $$ = builtin_type_f_complex_s32;}
|
||
;
|
||
|
||
nonempty_typelist
|
||
: type
|
||
{ $$ = (struct type **) malloc (sizeof (struct type *) * 2);
|
||
$<ivec>$[0] = 1; /* Number of types in vector */
|
||
$$[1] = $1;
|
||
}
|
||
| nonempty_typelist ',' type
|
||
{ int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
|
||
$$ = (struct type **) realloc ((char *) $1, len);
|
||
$$[$<ivec>$[0]] = $3;
|
||
}
|
||
;
|
||
|
||
name_not_typename : NAME
|
||
/* These would be useful if name_not_typename was useful, but it is just
|
||
a fake for "variable", so these cause reduce/reduce conflicts because
|
||
the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
|
||
=exp) or just an exp. If name_not_typename was ever used in an lvalue
|
||
context where only a name could occur, this might be useful.
|
||
| NAME_OR_INT
|
||
*/
|
||
;
|
||
|
||
%%
|
||
|
||
/* Take care of parsing a number (anything that starts with a digit).
|
||
Set yylval and return the token type; update lexptr.
|
||
LEN is the number of characters in it. */
|
||
|
||
/*** Needs some error checking for the float case ***/
|
||
|
||
static int
|
||
parse_number (p, len, parsed_float, putithere)
|
||
char *p;
|
||
int len;
|
||
int parsed_float;
|
||
YYSTYPE *putithere;
|
||
{
|
||
LONGEST n = 0;
|
||
LONGEST prevn = 0;
|
||
int c;
|
||
int base = input_radix;
|
||
int unsigned_p = 0;
|
||
int long_p = 0;
|
||
ULONGEST high_bit;
|
||
struct type *signed_type;
|
||
struct type *unsigned_type;
|
||
|
||
if (parsed_float)
|
||
{
|
||
/* It's a float since it contains a point or an exponent. */
|
||
/* [dD] is not understood as an exponent by atof, change it to 'e'. */
|
||
char *tmp, *tmp2;
|
||
|
||
tmp = xstrdup (p);
|
||
for (tmp2 = tmp; *tmp2; ++tmp2)
|
||
if (*tmp2 == 'd' || *tmp2 == 'D')
|
||
*tmp2 = 'e';
|
||
putithere->dval = atof (tmp);
|
||
free (tmp);
|
||
return FLOAT;
|
||
}
|
||
|
||
/* Handle base-switching prefixes 0x, 0t, 0d, 0 */
|
||
if (p[0] == '0')
|
||
switch (p[1])
|
||
{
|
||
case 'x':
|
||
case 'X':
|
||
if (len >= 3)
|
||
{
|
||
p += 2;
|
||
base = 16;
|
||
len -= 2;
|
||
}
|
||
break;
|
||
|
||
case 't':
|
||
case 'T':
|
||
case 'd':
|
||
case 'D':
|
||
if (len >= 3)
|
||
{
|
||
p += 2;
|
||
base = 10;
|
||
len -= 2;
|
||
}
|
||
break;
|
||
|
||
default:
|
||
base = 8;
|
||
break;
|
||
}
|
||
|
||
while (len-- > 0)
|
||
{
|
||
c = *p++;
|
||
if (isupper (c))
|
||
c = tolower (c);
|
||
if (len == 0 && c == 'l')
|
||
long_p = 1;
|
||
else if (len == 0 && c == 'u')
|
||
unsigned_p = 1;
|
||
else
|
||
{
|
||
int i;
|
||
if (c >= '0' && c <= '9')
|
||
i = c - '0';
|
||
else if (c >= 'a' && c <= 'f')
|
||
i = c - 'a' + 10;
|
||
else
|
||
return ERROR; /* Char not a digit */
|
||
if (i >= base)
|
||
return ERROR; /* Invalid digit in this base */
|
||
n *= base;
|
||
n += i;
|
||
}
|
||
/* Portably test for overflow (only works for nonzero values, so make
|
||
a second check for zero). */
|
||
if ((prevn >= n) && n != 0)
|
||
unsigned_p=1; /* Try something unsigned */
|
||
/* If range checking enabled, portably test for unsigned overflow. */
|
||
if (RANGE_CHECK && n != 0)
|
||
{
|
||
if ((unsigned_p && (unsigned)prevn >= (unsigned)n))
|
||
range_error("Overflow on numeric constant.");
|
||
}
|
||
prevn = n;
|
||
}
|
||
|
||
/* If the number is too big to be an int, or it's got an l suffix
|
||
then it's a long. Work out if this has to be a long by
|
||
shifting right and and seeing if anything remains, and the
|
||
target int size is different to the target long size.
|
||
|
||
In the expression below, we could have tested
|
||
(n >> TARGET_INT_BIT)
|
||
to see if it was zero,
|
||
but too many compilers warn about that, when ints and longs
|
||
are the same size. So we shift it twice, with fewer bits
|
||
each time, for the same result. */
|
||
|
||
if ((TARGET_INT_BIT != TARGET_LONG_BIT
|
||
&& ((n >> 2) >> (TARGET_INT_BIT-2))) /* Avoid shift warning */
|
||
|| long_p)
|
||
{
|
||
high_bit = ((ULONGEST)1) << (TARGET_LONG_BIT-1);
|
||
unsigned_type = builtin_type_unsigned_long;
|
||
signed_type = builtin_type_long;
|
||
}
|
||
else
|
||
{
|
||
high_bit = ((ULONGEST)1) << (TARGET_INT_BIT-1);
|
||
unsigned_type = builtin_type_unsigned_int;
|
||
signed_type = builtin_type_int;
|
||
}
|
||
|
||
putithere->typed_val.val = n;
|
||
|
||
/* If the high bit of the worked out type is set then this number
|
||
has to be unsigned. */
|
||
|
||
if (unsigned_p || (n & high_bit))
|
||
putithere->typed_val.type = unsigned_type;
|
||
else
|
||
putithere->typed_val.type = signed_type;
|
||
|
||
return INT;
|
||
}
|
||
|
||
struct token
|
||
{
|
||
char *operator;
|
||
int token;
|
||
enum exp_opcode opcode;
|
||
};
|
||
|
||
static const struct token dot_ops[] =
|
||
{
|
||
{ ".and.", BOOL_AND, BINOP_END },
|
||
{ ".AND.", BOOL_AND, BINOP_END },
|
||
{ ".or.", BOOL_OR, BINOP_END },
|
||
{ ".OR.", BOOL_OR, BINOP_END },
|
||
{ ".not.", BOOL_NOT, BINOP_END },
|
||
{ ".NOT.", BOOL_NOT, BINOP_END },
|
||
{ ".eq.", EQUAL, BINOP_END },
|
||
{ ".EQ.", EQUAL, BINOP_END },
|
||
{ ".eqv.", EQUAL, BINOP_END },
|
||
{ ".NEQV.", NOTEQUAL, BINOP_END },
|
||
{ ".neqv.", NOTEQUAL, BINOP_END },
|
||
{ ".EQV.", EQUAL, BINOP_END },
|
||
{ ".ne.", NOTEQUAL, BINOP_END },
|
||
{ ".NE.", NOTEQUAL, BINOP_END },
|
||
{ ".le.", LEQ, BINOP_END },
|
||
{ ".LE.", LEQ, BINOP_END },
|
||
{ ".ge.", GEQ, BINOP_END },
|
||
{ ".GE.", GEQ, BINOP_END },
|
||
{ ".gt.", GREATERTHAN, BINOP_END },
|
||
{ ".GT.", GREATERTHAN, BINOP_END },
|
||
{ ".lt.", LESSTHAN, BINOP_END },
|
||
{ ".LT.", LESSTHAN, BINOP_END },
|
||
{ NULL, 0, 0 }
|
||
};
|
||
|
||
struct f77_boolean_val
|
||
{
|
||
char *name;
|
||
int value;
|
||
};
|
||
|
||
static const struct f77_boolean_val boolean_values[] =
|
||
{
|
||
{ ".true.", 1 },
|
||
{ ".TRUE.", 1 },
|
||
{ ".false.", 0 },
|
||
{ ".FALSE.", 0 },
|
||
{ NULL, 0 }
|
||
};
|
||
|
||
static const struct token f77_keywords[] =
|
||
{
|
||
{ "complex_16", COMPLEX_S16_KEYWORD, BINOP_END },
|
||
{ "complex_32", COMPLEX_S32_KEYWORD, BINOP_END },
|
||
{ "character", CHARACTER, BINOP_END },
|
||
{ "integer_2", INT_S2_KEYWORD, BINOP_END },
|
||
{ "logical_1", LOGICAL_S1_KEYWORD, BINOP_END },
|
||
{ "logical_2", LOGICAL_S2_KEYWORD, BINOP_END },
|
||
{ "complex_8", COMPLEX_S8_KEYWORD, BINOP_END },
|
||
{ "integer", INT_KEYWORD, BINOP_END },
|
||
{ "logical", LOGICAL_KEYWORD, BINOP_END },
|
||
{ "real_16", REAL_S16_KEYWORD, BINOP_END },
|
||
{ "complex", COMPLEX_S8_KEYWORD, BINOP_END },
|
||
{ "sizeof", SIZEOF, BINOP_END },
|
||
{ "real_8", REAL_S8_KEYWORD, BINOP_END },
|
||
{ "real", REAL_KEYWORD, BINOP_END },
|
||
{ NULL, 0, 0 }
|
||
};
|
||
|
||
/* Implementation of a dynamically expandable buffer for processing input
|
||
characters acquired through lexptr and building a value to return in
|
||
yylval. Ripped off from ch-exp.y */
|
||
|
||
static char *tempbuf; /* Current buffer contents */
|
||
static int tempbufsize; /* Size of allocated buffer */
|
||
static int tempbufindex; /* Current index into buffer */
|
||
|
||
#define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */
|
||
|
||
#define CHECKBUF(size) \
|
||
do { \
|
||
if (tempbufindex + (size) >= tempbufsize) \
|
||
{ \
|
||
growbuf_by_size (size); \
|
||
} \
|
||
} while (0);
|
||
|
||
|
||
/* Grow the static temp buffer if necessary, including allocating the first one
|
||
on demand. */
|
||
|
||
static void
|
||
growbuf_by_size (count)
|
||
int count;
|
||
{
|
||
int growby;
|
||
|
||
growby = max (count, GROWBY_MIN_SIZE);
|
||
tempbufsize += growby;
|
||
if (tempbuf == NULL)
|
||
tempbuf = (char *) malloc (tempbufsize);
|
||
else
|
||
tempbuf = (char *) realloc (tempbuf, tempbufsize);
|
||
}
|
||
|
||
/* Blatantly ripped off from ch-exp.y. This routine recognizes F77
|
||
string-literals.
|
||
|
||
Recognize a string literal. A string literal is a nonzero sequence
|
||
of characters enclosed in matching single quotes, except that
|
||
a single character inside single quotes is a character literal, which
|
||
we reject as a string literal. To embed the terminator character inside
|
||
a string, it is simply doubled (I.E. 'this''is''one''string') */
|
||
|
||
static int
|
||
match_string_literal ()
|
||
{
|
||
char *tokptr = lexptr;
|
||
|
||
for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++)
|
||
{
|
||
CHECKBUF (1);
|
||
if (*tokptr == *lexptr)
|
||
{
|
||
if (*(tokptr + 1) == *lexptr)
|
||
tokptr++;
|
||
else
|
||
break;
|
||
}
|
||
tempbuf[tempbufindex++] = *tokptr;
|
||
}
|
||
if (*tokptr == '\0' /* no terminator */
|
||
|| tempbufindex == 0) /* no string */
|
||
return 0;
|
||
else
|
||
{
|
||
tempbuf[tempbufindex] = '\0';
|
||
yylval.sval.ptr = tempbuf;
|
||
yylval.sval.length = tempbufindex;
|
||
lexptr = ++tokptr;
|
||
return STRING_LITERAL;
|
||
}
|
||
}
|
||
|
||
/* Read one token, getting characters through lexptr. */
|
||
|
||
static int
|
||
yylex ()
|
||
{
|
||
int c;
|
||
int namelen;
|
||
unsigned int i,token;
|
||
char *tokstart;
|
||
|
||
retry:
|
||
|
||
prev_lexptr = lexptr;
|
||
|
||
tokstart = lexptr;
|
||
|
||
/* First of all, let us make sure we are not dealing with the
|
||
special tokens .true. and .false. which evaluate to 1 and 0. */
|
||
|
||
if (*lexptr == '.')
|
||
{
|
||
for (i = 0; boolean_values[i].name != NULL; i++)
|
||
{
|
||
if (strncmp (tokstart, boolean_values[i].name,
|
||
strlen (boolean_values[i].name)) == 0)
|
||
{
|
||
lexptr += strlen (boolean_values[i].name);
|
||
yylval.lval = boolean_values[i].value;
|
||
return BOOLEAN_LITERAL;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* See if it is a special .foo. operator. */
|
||
|
||
for (i = 0; dot_ops[i].operator != NULL; i++)
|
||
if (strncmp (tokstart, dot_ops[i].operator, strlen (dot_ops[i].operator)) == 0)
|
||
{
|
||
lexptr += strlen (dot_ops[i].operator);
|
||
yylval.opcode = dot_ops[i].opcode;
|
||
return dot_ops[i].token;
|
||
}
|
||
|
||
/* See if it is an exponentiation operator. */
|
||
|
||
if (strncmp (tokstart, "**", 2) == 0)
|
||
{
|
||
lexptr += 2;
|
||
yylval.opcode = BINOP_EXP;
|
||
return STARSTAR;
|
||
}
|
||
|
||
switch (c = *tokstart)
|
||
{
|
||
case 0:
|
||
return 0;
|
||
|
||
case ' ':
|
||
case '\t':
|
||
case '\n':
|
||
lexptr++;
|
||
goto retry;
|
||
|
||
case '\'':
|
||
token = match_string_literal ();
|
||
if (token != 0)
|
||
return (token);
|
||
break;
|
||
|
||
case '(':
|
||
paren_depth++;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case ')':
|
||
if (paren_depth == 0)
|
||
return 0;
|
||
paren_depth--;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case ',':
|
||
if (comma_terminates && paren_depth == 0)
|
||
return 0;
|
||
lexptr++;
|
||
return c;
|
||
|
||
case '.':
|
||
/* Might be a floating point number. */
|
||
if (lexptr[1] < '0' || lexptr[1] > '9')
|
||
goto symbol; /* Nope, must be a symbol. */
|
||
/* FALL THRU into number case. */
|
||
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
{
|
||
/* It's a number. */
|
||
int got_dot = 0, got_e = 0, got_d = 0, toktype;
|
||
char *p = tokstart;
|
||
int hex = input_radix > 10;
|
||
|
||
if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
|
||
{
|
||
p += 2;
|
||
hex = 1;
|
||
}
|
||
else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
|
||
{
|
||
p += 2;
|
||
hex = 0;
|
||
}
|
||
|
||
for (;; ++p)
|
||
{
|
||
if (!hex && !got_e && (*p == 'e' || *p == 'E'))
|
||
got_dot = got_e = 1;
|
||
else if (!hex && !got_d && (*p == 'd' || *p == 'D'))
|
||
got_dot = got_d = 1;
|
||
else if (!hex && !got_dot && *p == '.')
|
||
got_dot = 1;
|
||
else if (((got_e && (p[-1] == 'e' || p[-1] == 'E'))
|
||
|| (got_d && (p[-1] == 'd' || p[-1] == 'D')))
|
||
&& (*p == '-' || *p == '+'))
|
||
/* This is the sign of the exponent, not the end of the
|
||
number. */
|
||
continue;
|
||
/* We will take any letters or digits. parse_number will
|
||
complain if past the radix, or if L or U are not final. */
|
||
else if ((*p < '0' || *p > '9')
|
||
&& ((*p < 'a' || *p > 'z')
|
||
&& (*p < 'A' || *p > 'Z')))
|
||
break;
|
||
}
|
||
toktype = parse_number (tokstart, p - tokstart, got_dot|got_e|got_d,
|
||
&yylval);
|
||
if (toktype == ERROR)
|
||
{
|
||
char *err_copy = (char *) alloca (p - tokstart + 1);
|
||
|
||
memcpy (err_copy, tokstart, p - tokstart);
|
||
err_copy[p - tokstart] = 0;
|
||
error ("Invalid number \"%s\".", err_copy);
|
||
}
|
||
lexptr = p;
|
||
return toktype;
|
||
}
|
||
|
||
case '+':
|
||
case '-':
|
||
case '*':
|
||
case '/':
|
||
case '%':
|
||
case '|':
|
||
case '&':
|
||
case '^':
|
||
case '~':
|
||
case '!':
|
||
case '@':
|
||
case '<':
|
||
case '>':
|
||
case '[':
|
||
case ']':
|
||
case '?':
|
||
case ':':
|
||
case '=':
|
||
case '{':
|
||
case '}':
|
||
symbol:
|
||
lexptr++;
|
||
return c;
|
||
}
|
||
|
||
if (!(c == '_' || c == '$'
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
|
||
/* We must have come across a bad character (e.g. ';'). */
|
||
error ("Invalid character '%c' in expression.", c);
|
||
|
||
namelen = 0;
|
||
for (c = tokstart[namelen];
|
||
(c == '_' || c == '$' || (c >= '0' && c <= '9')
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
|
||
c = tokstart[++namelen]);
|
||
|
||
/* The token "if" terminates the expression and is NOT
|
||
removed from the input stream. */
|
||
|
||
if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
|
||
return 0;
|
||
|
||
lexptr += namelen;
|
||
|
||
/* Catch specific keywords. */
|
||
|
||
for (i = 0; f77_keywords[i].operator != NULL; i++)
|
||
if (strncmp (tokstart, f77_keywords[i].operator,
|
||
strlen(f77_keywords[i].operator)) == 0)
|
||
{
|
||
/* lexptr += strlen(f77_keywords[i].operator); */
|
||
yylval.opcode = f77_keywords[i].opcode;
|
||
return f77_keywords[i].token;
|
||
}
|
||
|
||
yylval.sval.ptr = tokstart;
|
||
yylval.sval.length = namelen;
|
||
|
||
if (*tokstart == '$')
|
||
{
|
||
write_dollar_variable (yylval.sval);
|
||
return VARIABLE;
|
||
}
|
||
|
||
/* Use token-type TYPENAME for symbols that happen to be defined
|
||
currently as names of types; NAME for other symbols.
|
||
The caller is not constrained to care about the distinction. */
|
||
{
|
||
char *tmp = copy_name (yylval.sval);
|
||
struct symbol *sym;
|
||
int is_a_field_of_this = 0;
|
||
int hextype;
|
||
|
||
sym = lookup_symbol (tmp, expression_context_block,
|
||
VAR_DOMAIN,
|
||
current_language->la_language == language_cplus
|
||
? &is_a_field_of_this : NULL,
|
||
NULL);
|
||
if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
|
||
{
|
||
yylval.tsym.type = SYMBOL_TYPE (sym);
|
||
return TYPENAME;
|
||
}
|
||
yylval.tsym.type
|
||
= language_lookup_primitive_type_by_name (current_language,
|
||
current_gdbarch, tmp);
|
||
if (yylval.tsym.type != NULL)
|
||
return TYPENAME;
|
||
|
||
/* Input names that aren't symbols but ARE valid hex numbers,
|
||
when the input radix permits them, can be names or numbers
|
||
depending on the parse. Note we support radixes > 16 here. */
|
||
if (!sym
|
||
&& ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
|
||
|| (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
|
||
{
|
||
YYSTYPE newlval; /* Its value is ignored. */
|
||
hextype = parse_number (tokstart, namelen, 0, &newlval);
|
||
if (hextype == INT)
|
||
{
|
||
yylval.ssym.sym = sym;
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this;
|
||
return NAME_OR_INT;
|
||
}
|
||
}
|
||
|
||
/* Any other kind of symbol */
|
||
yylval.ssym.sym = sym;
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this;
|
||
return NAME;
|
||
}
|
||
}
|
||
|
||
void
|
||
yyerror (msg)
|
||
char *msg;
|
||
{
|
||
if (prev_lexptr)
|
||
lexptr = prev_lexptr;
|
||
|
||
error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);
|
||
}
|