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1371 lines
36 KiB
Plaintext
1371 lines
36 KiB
Plaintext
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/* YACC parser for Fortran expressions, for GDB.
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Copyright (C) 1986-2020 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 3 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, see <http://www.gnu.org/licenses/>. */
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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 "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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#include <algorithm>
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#include "type-stack.h"
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#define parse_type(ps) builtin_type (ps->gdbarch ())
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#define parse_f_type(ps) builtin_f_type (ps->gdbarch ())
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/* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
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etc). */
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#define GDB_YY_REMAP_PREFIX f_
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#include "yy-remap.h"
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/* The state of the parser, used internally when we are parsing the
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expression. */
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static struct parser_state *pstate = NULL;
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/* Depth of parentheses. */
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static int paren_depth;
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/* The current type stack. */
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static struct type_stack *type_stack;
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int yyparse (void);
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static int yylex (void);
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static void yyerror (const 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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static void push_kind_type (LONGEST val, struct type *type);
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static struct type *convert_to_kind_type (struct type *basetype, int kind);
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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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struct {
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gdb_byte val[16];
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struct type *type;
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} typed_val_float;
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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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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 (struct parser_state *, const char *, int,
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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 <typed_val_float> 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 <sval> name
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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 KIND
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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_S8_KEYWORD
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%token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD
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%token COMPLEX_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 SINGLE DOUBLE PRECISION
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%token <lval> CHARACTER
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%token <voidval> DOLLAR_VARIABLE
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%token <opcode> ASSIGN_MODIFY
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%token <opcode> UNOP_INTRINSIC BINOP_INTRINSIC
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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 '%'
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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 (pstate, OP_TYPE);
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write_exp_elt_type (pstate, $1);
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write_exp_elt_opcode (pstate, 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 (pstate, UNOP_IND); }
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;
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exp : '&' exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_ADDR); }
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;
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exp : '-' exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_NEG); }
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;
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exp : BOOL_NOT exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
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;
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exp : '~' exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_COMPLEMENT); }
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;
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exp : SIZEOF exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_SIZEOF); }
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;
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exp : KIND '(' exp ')' %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_FORTRAN_KIND); }
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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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{ pstate->start_arglist (); }
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arglist ')'
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{ write_exp_elt_opcode (pstate,
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OP_F77_UNDETERMINED_ARGLIST);
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write_exp_elt_longcst (pstate,
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pstate->end_arglist ());
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write_exp_elt_opcode (pstate,
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OP_F77_UNDETERMINED_ARGLIST); }
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;
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exp : UNOP_INTRINSIC '(' exp ')'
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{ write_exp_elt_opcode (pstate, $1); }
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;
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exp : BINOP_INTRINSIC '(' exp ',' exp ')'
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{ write_exp_elt_opcode (pstate, $1); }
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;
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arglist :
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;
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arglist : exp
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{ pstate->arglist_len = 1; }
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;
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arglist : subrange
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{ pstate->arglist_len = 1; }
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;
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arglist : arglist ',' exp %prec ABOVE_COMMA
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{ pstate->arglist_len++; }
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;
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/* There are four sorts of subrange types in F90. */
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subrange: exp ':' exp %prec ABOVE_COMMA
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{ write_exp_elt_opcode (pstate, OP_RANGE);
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write_exp_elt_longcst (pstate, NONE_BOUND_DEFAULT);
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write_exp_elt_opcode (pstate, OP_RANGE); }
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;
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subrange: exp ':' %prec ABOVE_COMMA
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{ write_exp_elt_opcode (pstate, OP_RANGE);
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write_exp_elt_longcst (pstate, HIGH_BOUND_DEFAULT);
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write_exp_elt_opcode (pstate, OP_RANGE); }
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;
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subrange: ':' exp %prec ABOVE_COMMA
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{ write_exp_elt_opcode (pstate, OP_RANGE);
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write_exp_elt_longcst (pstate, LOW_BOUND_DEFAULT);
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write_exp_elt_opcode (pstate, OP_RANGE); }
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;
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subrange: ':' %prec ABOVE_COMMA
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{ write_exp_elt_opcode (pstate, OP_RANGE);
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write_exp_elt_longcst (pstate, BOTH_BOUND_DEFAULT);
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write_exp_elt_opcode (pstate, OP_RANGE); }
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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 (pstate, OP_COMPLEX);
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write_exp_elt_type (pstate,
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parse_f_type (pstate)
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->builtin_complex_s16);
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write_exp_elt_opcode (pstate, OP_COMPLEX); }
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;
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exp : '(' type ')' exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_CAST);
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write_exp_elt_type (pstate, $2);
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write_exp_elt_opcode (pstate, UNOP_CAST); }
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;
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exp : exp '%' name
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{ write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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write_exp_string (pstate, $3);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
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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 (pstate, BINOP_REPEAT); }
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;
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exp : exp STARSTAR exp
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{ write_exp_elt_opcode (pstate, BINOP_EXP); }
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;
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exp : exp '*' exp
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{ write_exp_elt_opcode (pstate, BINOP_MUL); }
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;
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exp : exp '/' exp
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{ write_exp_elt_opcode (pstate, BINOP_DIV); }
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;
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exp : exp '+' exp
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{ write_exp_elt_opcode (pstate, BINOP_ADD); }
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;
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exp : exp '-' exp
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{ write_exp_elt_opcode (pstate, BINOP_SUB); }
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;
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exp : exp LSH exp
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{ write_exp_elt_opcode (pstate, BINOP_LSH); }
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;
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exp : exp RSH exp
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{ write_exp_elt_opcode (pstate, BINOP_RSH); }
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;
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exp : exp EQUAL exp
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{ write_exp_elt_opcode (pstate, BINOP_EQUAL); }
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;
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exp : exp NOTEQUAL exp
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{ write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
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;
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exp : exp LEQ exp
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{ write_exp_elt_opcode (pstate, BINOP_LEQ); }
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;
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exp : exp GEQ exp
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{ write_exp_elt_opcode (pstate, BINOP_GEQ); }
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;
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exp : exp LESSTHAN exp
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{ write_exp_elt_opcode (pstate, BINOP_LESS); }
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;
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exp : exp GREATERTHAN exp
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{ write_exp_elt_opcode (pstate, BINOP_GTR); }
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;
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exp : exp '&' exp
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
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;
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exp : exp '^' exp
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
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;
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exp : exp '|' exp
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
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;
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exp : exp BOOL_AND exp
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{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
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;
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exp : exp BOOL_OR exp
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{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
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;
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exp : exp '=' exp
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{ write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
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;
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exp : exp ASSIGN_MODIFY exp
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{ write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
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write_exp_elt_opcode (pstate, $2);
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write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY); }
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;
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exp : INT
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{ write_exp_elt_opcode (pstate, OP_LONG);
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write_exp_elt_type (pstate, $1.type);
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write_exp_elt_longcst (pstate, (LONGEST) ($1.val));
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write_exp_elt_opcode (pstate, 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 (pstate, $1.stoken.ptr,
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$1.stoken.length, 0, &val);
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write_exp_elt_opcode (pstate, OP_LONG);
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write_exp_elt_type (pstate, val.typed_val.type);
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write_exp_elt_longcst (pstate,
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(LONGEST)val.typed_val.val);
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write_exp_elt_opcode (pstate, OP_LONG); }
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;
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exp : FLOAT
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{ write_exp_elt_opcode (pstate, OP_FLOAT);
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write_exp_elt_type (pstate, $1.type);
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write_exp_elt_floatcst (pstate, $1.val);
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write_exp_elt_opcode (pstate, OP_FLOAT); }
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;
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exp : variable
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;
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exp : DOLLAR_VARIABLE
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;
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exp : SIZEOF '(' type ')' %prec UNARY
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{ write_exp_elt_opcode (pstate, OP_LONG);
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write_exp_elt_type (pstate,
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parse_f_type (pstate)
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->builtin_integer);
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$3 = check_typedef ($3);
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write_exp_elt_longcst (pstate,
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(LONGEST) TYPE_LENGTH ($3));
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write_exp_elt_opcode (pstate, OP_LONG); }
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;
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exp : BOOLEAN_LITERAL
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{ write_exp_elt_opcode (pstate, OP_BOOL);
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write_exp_elt_longcst (pstate, (LONGEST) $1);
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write_exp_elt_opcode (pstate, 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 (pstate, OP_STRING);
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write_exp_string (pstate, $1);
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write_exp_elt_opcode (pstate, OP_STRING);
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}
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;
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variable: name_not_typename
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{ struct block_symbol sym = $1.sym;
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if (sym.symbol)
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{
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if (symbol_read_needs_frame (sym.symbol))
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pstate->block_tracker->update (sym);
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write_exp_elt_opcode (pstate, OP_VAR_VALUE);
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write_exp_elt_block (pstate, sym.block);
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write_exp_elt_sym (pstate, sym.symbol);
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write_exp_elt_opcode (pstate, 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 bound_minimal_symbol msymbol;
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std::string arg = copy_name ($1.stoken);
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msymbol =
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lookup_bound_minimal_symbol (arg.c_str ());
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if (msymbol.minsym != NULL)
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write_exp_msymbol (pstate, msymbol);
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else if (!have_full_symbols () && !have_partial_symbols ())
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error (_("No symbol table is loaded. Use the \"file\" command."));
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else
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error (_("No symbol \"%s\" in current context."),
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arg.c_str ());
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}
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}
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;
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type : ptype
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;
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ptype : typebase
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| typebase abs_decl
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{
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/* This is where the interesting stuff happens. */
|
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int done = 0;
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int array_size;
|
||
struct type *follow_type = $1;
|
||
struct type *range_type;
|
||
|
||
while (!done)
|
||
switch (type_stack->pop ())
|
||
{
|
||
case tp_end:
|
||
done = 1;
|
||
break;
|
||
case tp_pointer:
|
||
follow_type = lookup_pointer_type (follow_type);
|
||
break;
|
||
case tp_reference:
|
||
follow_type = lookup_lvalue_reference_type (follow_type);
|
||
break;
|
||
case tp_array:
|
||
array_size = type_stack->pop_int ();
|
||
if (array_size != -1)
|
||
{
|
||
range_type =
|
||
create_static_range_type ((struct type *) NULL,
|
||
parse_f_type (pstate)
|
||
->builtin_integer,
|
||
0, 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;
|
||
case tp_kind:
|
||
{
|
||
int kind_val = type_stack->pop_int ();
|
||
follow_type
|
||
= convert_to_kind_type (follow_type, kind_val);
|
||
}
|
||
break;
|
||
}
|
||
$$ = follow_type;
|
||
}
|
||
;
|
||
|
||
abs_decl: '*'
|
||
{ type_stack->push (tp_pointer); $$ = 0; }
|
||
| '*' abs_decl
|
||
{ type_stack->push (tp_pointer); $$ = $2; }
|
||
| '&'
|
||
{ type_stack->push (tp_reference); $$ = 0; }
|
||
| '&' abs_decl
|
||
{ type_stack->push (tp_reference); $$ = $2; }
|
||
| direct_abs_decl
|
||
;
|
||
|
||
direct_abs_decl: '(' abs_decl ')'
|
||
{ $$ = $2; }
|
||
| '(' KIND '=' INT ')'
|
||
{ push_kind_type ($4.val, $4.type); }
|
||
| '*' INT
|
||
{ push_kind_type ($2.val, $2.type); }
|
||
| direct_abs_decl func_mod
|
||
{ type_stack->push (tp_function); }
|
||
| func_mod
|
||
{ type_stack->push (tp_function); }
|
||
;
|
||
|
||
func_mod: '(' ')'
|
||
{ $$ = 0; }
|
||
| '(' nonempty_typelist ')'
|
||
{ free ($2); $$ = 0; }
|
||
;
|
||
|
||
typebase /* Implements (approximately): (type-qualifier)* type-specifier */
|
||
: TYPENAME
|
||
{ $$ = $1.type; }
|
||
| INT_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_integer; }
|
||
| INT_S2_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_integer_s2; }
|
||
| CHARACTER
|
||
{ $$ = parse_f_type (pstate)->builtin_character; }
|
||
| LOGICAL_S8_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_logical_s8; }
|
||
| LOGICAL_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_logical; }
|
||
| LOGICAL_S2_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_logical_s2; }
|
||
| LOGICAL_S1_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_logical_s1; }
|
||
| REAL_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_real; }
|
||
| REAL_S8_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_real_s8; }
|
||
| REAL_S16_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_real_s16; }
|
||
| COMPLEX_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_complex_s8; }
|
||
| COMPLEX_S8_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_complex_s8; }
|
||
| COMPLEX_S16_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_complex_s16; }
|
||
| COMPLEX_S32_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_complex_s32; }
|
||
| SINGLE PRECISION
|
||
{ $$ = parse_f_type (pstate)->builtin_real;}
|
||
| DOUBLE PRECISION
|
||
{ $$ = parse_f_type (pstate)->builtin_real_s8;}
|
||
| SINGLE COMPLEX_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_complex_s8;}
|
||
| DOUBLE COMPLEX_KEYWORD
|
||
{ $$ = parse_f_type (pstate)->builtin_complex_s16;}
|
||
;
|
||
|
||
nonempty_typelist
|
||
: type
|
||
{ $$ = (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);
|
||
$$[$<ivec>$[0]] = $3;
|
||
}
|
||
;
|
||
|
||
name : NAME
|
||
{ $$ = $1.stoken; }
|
||
;
|
||
|
||
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 (struct parser_state *par_state,
|
||
const 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 parse_float,
|
||
change it to 'e'. */
|
||
char *tmp, *tmp2;
|
||
|
||
tmp = xstrdup (p);
|
||
for (tmp2 = tmp; *tmp2; ++tmp2)
|
||
if (*tmp2 == 'd' || *tmp2 == 'D')
|
||
*tmp2 = 'e';
|
||
|
||
/* FIXME: Should this use different types? */
|
||
putithere->typed_val_float.type = parse_f_type (pstate)->builtin_real_s8;
|
||
bool parsed = parse_float (tmp, len,
|
||
putithere->typed_val_float.type,
|
||
putithere->typed_val_float.val);
|
||
free (tmp);
|
||
return parsed? FLOAT : ERROR;
|
||
}
|
||
|
||
/* 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 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 >> gdbarch_int_bit (parse_gdbarch))
|
||
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 ((gdbarch_int_bit (par_state->gdbarch ())
|
||
!= gdbarch_long_bit (par_state->gdbarch ())
|
||
&& ((n >> 2)
|
||
>> (gdbarch_int_bit (par_state->gdbarch ())-2))) /* Avoid
|
||
shift warning */
|
||
|| long_p)
|
||
{
|
||
high_bit = ((ULONGEST)1)
|
||
<< (gdbarch_long_bit (par_state->gdbarch ())-1);
|
||
unsigned_type = parse_type (par_state)->builtin_unsigned_long;
|
||
signed_type = parse_type (par_state)->builtin_long;
|
||
}
|
||
else
|
||
{
|
||
high_bit =
|
||
((ULONGEST)1) << (gdbarch_int_bit (par_state->gdbarch ()) - 1);
|
||
unsigned_type = parse_type (par_state)->builtin_unsigned_int;
|
||
signed_type = parse_type (par_state)->builtin_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;
|
||
}
|
||
|
||
/* Called to setup the type stack when we encounter a '(kind=N)' type
|
||
modifier, performs some bounds checking on 'N' and then pushes this to
|
||
the type stack followed by the 'tp_kind' marker. */
|
||
static void
|
||
push_kind_type (LONGEST val, struct type *type)
|
||
{
|
||
int ival;
|
||
|
||
if (TYPE_UNSIGNED (type))
|
||
{
|
||
ULONGEST uval = static_cast <ULONGEST> (val);
|
||
if (uval > INT_MAX)
|
||
error (_("kind value out of range"));
|
||
ival = static_cast <int> (uval);
|
||
}
|
||
else
|
||
{
|
||
if (val > INT_MAX || val < 0)
|
||
error (_("kind value out of range"));
|
||
ival = static_cast <int> (val);
|
||
}
|
||
|
||
type_stack->push (ival);
|
||
type_stack->push (tp_kind);
|
||
}
|
||
|
||
/* Called when a type has a '(kind=N)' modifier after it, for example
|
||
'character(kind=1)'. The BASETYPE is the type described by 'character'
|
||
in our example, and KIND is the integer '1'. This function returns a
|
||
new type that represents the basetype of a specific kind. */
|
||
static struct type *
|
||
convert_to_kind_type (struct type *basetype, int kind)
|
||
{
|
||
if (basetype == parse_f_type (pstate)->builtin_character)
|
||
{
|
||
/* Character of kind 1 is a special case, this is the same as the
|
||
base character type. */
|
||
if (kind == 1)
|
||
return parse_f_type (pstate)->builtin_character;
|
||
}
|
||
else if (basetype == parse_f_type (pstate)->builtin_complex_s8)
|
||
{
|
||
if (kind == 4)
|
||
return parse_f_type (pstate)->builtin_complex_s8;
|
||
else if (kind == 8)
|
||
return parse_f_type (pstate)->builtin_complex_s16;
|
||
else if (kind == 16)
|
||
return parse_f_type (pstate)->builtin_complex_s32;
|
||
}
|
||
else if (basetype == parse_f_type (pstate)->builtin_real)
|
||
{
|
||
if (kind == 4)
|
||
return parse_f_type (pstate)->builtin_real;
|
||
else if (kind == 8)
|
||
return parse_f_type (pstate)->builtin_real_s8;
|
||
else if (kind == 16)
|
||
return parse_f_type (pstate)->builtin_real_s16;
|
||
}
|
||
else if (basetype == parse_f_type (pstate)->builtin_logical)
|
||
{
|
||
if (kind == 1)
|
||
return parse_f_type (pstate)->builtin_logical_s1;
|
||
else if (kind == 2)
|
||
return parse_f_type (pstate)->builtin_logical_s2;
|
||
else if (kind == 4)
|
||
return parse_f_type (pstate)->builtin_logical;
|
||
else if (kind == 8)
|
||
return parse_f_type (pstate)->builtin_logical_s8;
|
||
}
|
||
else if (basetype == parse_f_type (pstate)->builtin_integer)
|
||
{
|
||
if (kind == 2)
|
||
return parse_f_type (pstate)->builtin_integer_s2;
|
||
else if (kind == 4)
|
||
return parse_f_type (pstate)->builtin_integer;
|
||
else if (kind == 8)
|
||
return parse_f_type (pstate)->builtin_integer_s8;
|
||
}
|
||
|
||
error (_("unsupported kind %d for type %s"),
|
||
kind, TYPE_SAFE_NAME (basetype));
|
||
|
||
/* Should never get here. */
|
||
return nullptr;
|
||
}
|
||
|
||
struct token
|
||
{
|
||
/* The string to match against. */
|
||
const char *oper;
|
||
|
||
/* The lexer token to return. */
|
||
int token;
|
||
|
||
/* The expression opcode to embed within the token. */
|
||
enum exp_opcode opcode;
|
||
|
||
/* When this is true the string in OPER is matched exactly including
|
||
case, when this is false OPER is matched case insensitively. */
|
||
bool case_sensitive;
|
||
};
|
||
|
||
static const struct token dot_ops[] =
|
||
{
|
||
{ ".and.", BOOL_AND, BINOP_END, false },
|
||
{ ".or.", BOOL_OR, BINOP_END, false },
|
||
{ ".not.", BOOL_NOT, BINOP_END, false },
|
||
{ ".eq.", EQUAL, BINOP_END, false },
|
||
{ ".eqv.", EQUAL, BINOP_END, false },
|
||
{ ".neqv.", NOTEQUAL, BINOP_END, false },
|
||
{ ".ne.", NOTEQUAL, BINOP_END, false },
|
||
{ ".le.", LEQ, BINOP_END, false },
|
||
{ ".ge.", GEQ, BINOP_END, false },
|
||
{ ".gt.", GREATERTHAN, BINOP_END, false },
|
||
{ ".lt.", LESSTHAN, BINOP_END, false },
|
||
};
|
||
|
||
/* Holds the Fortran representation of a boolean, and the integer value we
|
||
substitute in when one of the matching strings is parsed. */
|
||
struct f77_boolean_val
|
||
{
|
||
/* The string representing a Fortran boolean. */
|
||
const char *name;
|
||
|
||
/* The integer value to replace it with. */
|
||
int value;
|
||
};
|
||
|
||
/* The set of Fortran booleans. These are matched case insensitively. */
|
||
static const struct f77_boolean_val boolean_values[] =
|
||
{
|
||
{ ".true.", 1 },
|
||
{ ".false.", 0 }
|
||
};
|
||
|
||
static const struct token f77_keywords[] =
|
||
{
|
||
/* Historically these have always been lowercase only in GDB. */
|
||
{ "complex_16", COMPLEX_S16_KEYWORD, BINOP_END, true },
|
||
{ "complex_32", COMPLEX_S32_KEYWORD, BINOP_END, true },
|
||
{ "character", CHARACTER, BINOP_END, true },
|
||
{ "integer_2", INT_S2_KEYWORD, BINOP_END, true },
|
||
{ "logical_1", LOGICAL_S1_KEYWORD, BINOP_END, true },
|
||
{ "logical_2", LOGICAL_S2_KEYWORD, BINOP_END, true },
|
||
{ "logical_8", LOGICAL_S8_KEYWORD, BINOP_END, true },
|
||
{ "complex_8", COMPLEX_S8_KEYWORD, BINOP_END, true },
|
||
{ "integer", INT_KEYWORD, BINOP_END, true },
|
||
{ "logical", LOGICAL_KEYWORD, BINOP_END, true },
|
||
{ "real_16", REAL_S16_KEYWORD, BINOP_END, true },
|
||
{ "complex", COMPLEX_KEYWORD, BINOP_END, true },
|
||
{ "sizeof", SIZEOF, BINOP_END, true },
|
||
{ "real_8", REAL_S8_KEYWORD, BINOP_END, true },
|
||
{ "real", REAL_KEYWORD, BINOP_END, true },
|
||
{ "single", SINGLE, BINOP_END, true },
|
||
{ "double", DOUBLE, BINOP_END, true },
|
||
{ "precision", PRECISION, BINOP_END, true },
|
||
/* The following correspond to actual functions in Fortran and are case
|
||
insensitive. */
|
||
{ "kind", KIND, BINOP_END, false },
|
||
{ "abs", UNOP_INTRINSIC, UNOP_ABS, false },
|
||
{ "mod", BINOP_INTRINSIC, BINOP_MOD, false },
|
||
{ "floor", UNOP_INTRINSIC, UNOP_FORTRAN_FLOOR, false },
|
||
{ "ceiling", UNOP_INTRINSIC, UNOP_FORTRAN_CEILING, false },
|
||
{ "modulo", BINOP_INTRINSIC, BINOP_FORTRAN_MODULO, false },
|
||
{ "cmplx", BINOP_INTRINSIC, BINOP_FORTRAN_CMPLX, false },
|
||
};
|
||
|
||
/* 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 (int count)
|
||
{
|
||
int growby;
|
||
|
||
growby = std::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 (void)
|
||
{
|
||
const char *tokptr = pstate->lexptr;
|
||
|
||
for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++)
|
||
{
|
||
CHECKBUF (1);
|
||
if (*tokptr == *pstate->lexptr)
|
||
{
|
||
if (*(tokptr + 1) == *pstate->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;
|
||
pstate->lexptr = ++tokptr;
|
||
return STRING_LITERAL;
|
||
}
|
||
}
|
||
|
||
/* Read one token, getting characters through lexptr. */
|
||
|
||
static int
|
||
yylex (void)
|
||
{
|
||
int c;
|
||
int namelen;
|
||
unsigned int token;
|
||
const char *tokstart;
|
||
|
||
retry:
|
||
|
||
pstate->prev_lexptr = pstate->lexptr;
|
||
|
||
tokstart = pstate->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 (*pstate->lexptr == '.')
|
||
{
|
||
for (int i = 0; i < ARRAY_SIZE (boolean_values); i++)
|
||
{
|
||
if (strncasecmp (tokstart, boolean_values[i].name,
|
||
strlen (boolean_values[i].name)) == 0)
|
||
{
|
||
pstate->lexptr += strlen (boolean_values[i].name);
|
||
yylval.lval = boolean_values[i].value;
|
||
return BOOLEAN_LITERAL;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* See if it is a special .foo. operator. */
|
||
for (int i = 0; i < ARRAY_SIZE (dot_ops); i++)
|
||
if (strncasecmp (tokstart, dot_ops[i].oper,
|
||
strlen (dot_ops[i].oper)) == 0)
|
||
{
|
||
gdb_assert (!dot_ops[i].case_sensitive);
|
||
pstate->lexptr += strlen (dot_ops[i].oper);
|
||
yylval.opcode = dot_ops[i].opcode;
|
||
return dot_ops[i].token;
|
||
}
|
||
|
||
/* See if it is an exponentiation operator. */
|
||
|
||
if (strncmp (tokstart, "**", 2) == 0)
|
||
{
|
||
pstate->lexptr += 2;
|
||
yylval.opcode = BINOP_EXP;
|
||
return STARSTAR;
|
||
}
|
||
|
||
switch (c = *tokstart)
|
||
{
|
||
case 0:
|
||
return 0;
|
||
|
||
case ' ':
|
||
case '\t':
|
||
case '\n':
|
||
pstate->lexptr++;
|
||
goto retry;
|
||
|
||
case '\'':
|
||
token = match_string_literal ();
|
||
if (token != 0)
|
||
return (token);
|
||
break;
|
||
|
||
case '(':
|
||
paren_depth++;
|
||
pstate->lexptr++;
|
||
return c;
|
||
|
||
case ')':
|
||
if (paren_depth == 0)
|
||
return 0;
|
||
paren_depth--;
|
||
pstate->lexptr++;
|
||
return c;
|
||
|
||
case ',':
|
||
if (pstate->comma_terminates && paren_depth == 0)
|
||
return 0;
|
||
pstate->lexptr++;
|
||
return c;
|
||
|
||
case '.':
|
||
/* Might be a floating point number. */
|
||
if (pstate->lexptr[1] < '0' || pstate->lexptr[1] > '9')
|
||
goto symbol; /* Nope, must be a symbol. */
|
||
/* FALL THRU. */
|
||
|
||
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;
|
||
const 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 (pstate, 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);
|
||
}
|
||
pstate->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:
|
||
pstate->lexptr++;
|
||
return c;
|
||
}
|
||
|
||
if (!(c == '_' || 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 == '$' || c == ':' || (c >= '0' && c <= '9')
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
|
||
c = tokstart[++namelen]);
|
||
|
||
/* The token "if" terminates the expression and is NOT
|
||
removed from the input stream. */
|
||
|
||
if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
|
||
return 0;
|
||
|
||
pstate->lexptr += namelen;
|
||
|
||
/* Catch specific keywords. */
|
||
|
||
for (int i = 0; i < ARRAY_SIZE (f77_keywords); i++)
|
||
if (strlen (f77_keywords[i].oper) == namelen
|
||
&& ((!f77_keywords[i].case_sensitive
|
||
&& strncasecmp (tokstart, f77_keywords[i].oper, namelen) == 0)
|
||
|| (f77_keywords[i].case_sensitive
|
||
&& strncmp (tokstart, f77_keywords[i].oper, namelen) == 0)))
|
||
{
|
||
yylval.opcode = f77_keywords[i].opcode;
|
||
return f77_keywords[i].token;
|
||
}
|
||
|
||
yylval.sval.ptr = tokstart;
|
||
yylval.sval.length = namelen;
|
||
|
||
if (*tokstart == '$')
|
||
{
|
||
write_dollar_variable (pstate, yylval.sval);
|
||
return DOLLAR_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. */
|
||
{
|
||
std::string tmp = copy_name (yylval.sval);
|
||
struct block_symbol result;
|
||
enum domain_enum_tag lookup_domains[] =
|
||
{
|
||
STRUCT_DOMAIN,
|
||
VAR_DOMAIN,
|
||
MODULE_DOMAIN
|
||
};
|
||
int hextype;
|
||
|
||
for (int i = 0; i < ARRAY_SIZE (lookup_domains); ++i)
|
||
{
|
||
result = lookup_symbol (tmp.c_str (), pstate->expression_context_block,
|
||
lookup_domains[i], NULL);
|
||
if (result.symbol && SYMBOL_CLASS (result.symbol) == LOC_TYPEDEF)
|
||
{
|
||
yylval.tsym.type = SYMBOL_TYPE (result.symbol);
|
||
return TYPENAME;
|
||
}
|
||
|
||
if (result.symbol)
|
||
break;
|
||
}
|
||
|
||
yylval.tsym.type
|
||
= language_lookup_primitive_type (pstate->language (),
|
||
pstate->gdbarch (), tmp.c_str ());
|
||
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 (!result.symbol
|
||
&& ((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 (pstate, tokstart, namelen, 0, &newlval);
|
||
if (hextype == INT)
|
||
{
|
||
yylval.ssym.sym = result;
|
||
yylval.ssym.is_a_field_of_this = false;
|
||
return NAME_OR_INT;
|
||
}
|
||
}
|
||
|
||
/* Any other kind of symbol */
|
||
yylval.ssym.sym = result;
|
||
yylval.ssym.is_a_field_of_this = false;
|
||
return NAME;
|
||
}
|
||
}
|
||
|
||
int
|
||
f_parse (struct parser_state *par_state)
|
||
{
|
||
/* Setting up the parser state. */
|
||
scoped_restore pstate_restore = make_scoped_restore (&pstate);
|
||
scoped_restore restore_yydebug = make_scoped_restore (&yydebug,
|
||
parser_debug);
|
||
gdb_assert (par_state != NULL);
|
||
pstate = par_state;
|
||
paren_depth = 0;
|
||
|
||
struct type_stack stack;
|
||
scoped_restore restore_type_stack = make_scoped_restore (&type_stack,
|
||
&stack);
|
||
|
||
return yyparse ();
|
||
}
|
||
|
||
static void
|
||
yyerror (const char *msg)
|
||
{
|
||
if (pstate->prev_lexptr)
|
||
pstate->lexptr = pstate->prev_lexptr;
|
||
|
||
error (_("A %s in expression, near `%s'."), msg, pstate->lexptr);
|
||
}
|