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edd079d9f6
When parsing floating-point literals, the language parsers currently use parse_float or some equivalent routine to parse the input string into a DOUBLEST, which is then stored within a OP_DOUBLE expression node. When evaluating the expression, the OP_DOUBLE is finally converted into a value in target format. On the other hand, *decimal* floating-point literals are parsed directly into target format and stored that way in a OP_DECFLOAT expression node. In order to eliminate the DOUBLEST, this patch therefore unifies the handling of binary and decimal floating- point literals and stores them both in target format within a new OP_FLOAT expression node, replacing both OP_DOUBLE and OP_DECFLOAT. In order to store literals in target format, the parse_float routine needs to know the type of the literal. All parsers therefore need to be changed to determine the appropriate type (e.g. by detecting suffixes) *before* calling parse_float, instead of after it as today. However, this change is mostly straightforward -- again, this is already done for decimal FP today. The core of the literal parsing is moved into a new routine floatformat_from_string, mirroring floatformat_to_string. The parse_float routine now calls either floatformat_from_string or decimal_from_sting, allowing it to handle any type of FP literal. All language parsers need to be updated. Some notes on specific changes to the various languages: - C: Decimal FP is now handled in parse_float, and no longer needs to be handled specially. - D: Straightforward. - Fortran: Still used a hard-coded "atof", also replaced by parse_float now. Continues to always use builtin_real_s8 as the type of literal, even though this is probably wrong. - Go: This used to handle "f" and "l" suffixes, even though the Go language actually doesn't support those. I kept this support for now -- maybe revisit later. Note the the GDB test suite for some reason actually *verifies* that GDB supports those unsupported suffixes ... - Pascal: Likewise -- this handles suffixes that are not supported in the language standard. - Modula-2: Like Fortran, used to use "atof". - Rust: Mostly straightforward, except for a unit-testing hitch. The code use to set a special "unit_testing" flag which would cause "rust_type" to always return NULL. This makes it not possible to encode a literal into target format (which type?). The reason for this flag appears to have been that during unit testing, there is no "rust_parser" context set up, which means no "gdbarch" is available to use its types. To fix this, I removed the unit_testing flag, and instead simply just set up a dummy rust_parser context during unit testing. - Ada: This used to check sizeof (DOUBLEST) to determine which type to use for floating-point literal. This seems questionable to begin with (since DOUBLEST is quite unrelated to target formats), and in any case we need to get rid of DOUBLEST. I'm now simply always using the largest type (builtin_long_double). gdb/ChangeLog: 2017-10-25 Ulrich Weigand <uweigand@de.ibm.com> * doublest.c (floatformat_from_string): New function. * doublest.h (floatformat_from_string): Add prototype. * std-operator.def (OP_DOUBLE, OP_DECFLOAT): Remove, replace by ... (OP_FLOAT): ... this. * expression.h: Do not include "doublest.h". (union exp_element): Replace doubleconst and decfloatconst by new element floatconst. * ada-lang.c (resolve_subexp): Handle OP_FLOAT instead of OP_DOUBLE. (ada_evaluate_subexp): Likewise. * eval.c (evaluate_subexp_standard): Handle OP_FLOAT instead of OP_DOUBLE and OP_DECFLOAT. * expprint.c (print_subexp_standard): Likewise. (dump_subexp_body_standard): Likewise. * breakpoint.c (watchpoint_exp_is_const): Likewise. * parse.c: Include "dfp.h". (write_exp_elt_dblcst, write_exp_elt_decfloatcst): Remove. (write_exp_elt_floatcst): New function. (operator_length_standard): Handle OP_FLOAT instead of OP_DOUBLE and OP_DECFLOAT. (operator_check_standard): Likewise. (parse_float): Do not accept suffix. Take type as input. Return bool. Return target format buffer instead of host DOUBLEST. Use floatformat_from_string and decimal_from_string to parse either binary or decimal floating-point types. (parse_c_float): Remove. * parser-defs.h: Do not include "doublest.h". (write_exp_elt_dblcst, write_exp_elt_decfloatcst): Remove. (write_exp_elt_floatcst): Add prototype. (parse_float): Update prototype. (parse_c_float): Remove. * c-exp.y: Do not include "dfp.h". (typed_val_float): Use byte buffer instead of DOUBLEST. (typed_val_decfloat): Remove. (DECFLOAT): Remove. (FLOAT): Use OP_FLOAT and write_exp_elt_floatcst. (parse_number): Update to new parse_float interface. Parse suffixes and determine type before calling parse_float. Handle decimal and binary FP types the same way. * d-exp.y (typed_val_float): Use byte buffer instead of DOUBLEST. (FLOAT_LITERAL): Use OP_FLOAT and write_exp_elt_floatcst. (parse_number): Update to new parse_float interface. Parse suffixes and determine type before calling parse_float. * f-exp.y: Replace dval by typed_val_float. (FLOAT): Use OP_FLOAT and write_exp_elt_floatcst. (parse_number): Use parse_float instead of atof. * go-exp.y (typed_val_float): Use byte buffer instead of DOUBLEST. (parse_go_float): Remove. (FLOAT): Use OP_FLOAT and write_exp_elt_floatcst. (parse_number): Call parse_float instead of parse_go_float. Parse suffixes and determine type before calling parse_float. * p-exp.y (typed_val_float): Use byte buffer instead of DOUBLEST. (FLOAT): Use OP_FLOAT and write_exp_elt_floatcst. (parse_number): Update to new parse_float interface. Parse suffixes and determine type before calling parse_float. * m2-exp.y: Replace dval by byte buffer val. (FLOAT): Use OP_FLOAT and write_exp_elt_floatcst. (parse_number): Call parse_float instead of atof. * rust-exp.y (typed_val_float): Use byte buffer instead of DOUBLEST. (lex_number): Call parse_float instead of strtod. (ast_dliteral): Use OP_FLOAT instead of OP_DOUBLE. (convert_ast_to_expression): Handle OP_FLOAT instead of OP_DOUBLE. Use write_exp_elt_floatcst. (unit_testing): Remove static variable. (rust_type): Do not check unit_testing. (rust_lex_tests): Do not set uint_testing. Set up dummy rust_parser. * ada-exp.y (type_float, type_double): Remove. (typed_val_float): Use byte buffer instead of DOUBLEST. (FLOAT): Use OP_FLOAT and write_exp_elt_floatcst. * ada-lex.l (processReal): Use parse_float instead of sscanf.
1741 lines
45 KiB
Plaintext
1741 lines
45 KiB
Plaintext
/* YACC parser for Pascal expressions, for GDB.
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Copyright (C) 2000-2017 Free Software Foundation, Inc.
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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 file is derived from c-exp.y */
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/* Parse a Pascal 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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/* Known bugs or limitations:
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- pascal string operations are not supported at all.
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- there are some problems with boolean types.
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- Pascal type hexadecimal constants are not supported
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because they conflict with the internal variables format.
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Probably also lots of other problems, less well defined PM. */
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%{
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#include "defs.h"
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#include <ctype.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 "p-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 "completer.h"
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#define parse_type(ps) builtin_type (parse_gdbarch (ps))
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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 pascal_
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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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int yyparse (void);
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static int yylex (void);
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void yyerror (const char *);
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static char *uptok (const char *, int);
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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_int;
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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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const 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 (struct parser_state *,
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const char *, int, int, YYSTYPE *);
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static struct type *current_type;
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static struct internalvar *intvar;
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static int leftdiv_is_integer;
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static void push_current_type (void);
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static void pop_current_type (void);
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static int search_field;
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%}
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%type <voidval> exp exp1 type_exp start normal_start variable qualified_name
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%type <tval> type typebase
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/* %type <bval> block */
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/* Fancy type parsing. */
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%type <tval> ptype
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%token <typed_val_int> 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
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%token <sval> FIELDNAME
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%token <voidval> COMPLETE
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%token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
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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 STRUCT CLASS SIZEOF COLONCOLON
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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 <voidval> VARIABLE
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/* Object pascal */
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%token THIS
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%token <lval> TRUEKEYWORD FALSEKEYWORD
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%left ','
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%left ABOVE_COMMA
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%right ASSIGN
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%left NOT
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%left OR
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%left XOR
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%left ANDAND
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%left '=' NOTEQUAL
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%left '<' '>' LEQ GEQ
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%left LSH RSH DIV MOD
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%left '@'
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%left '+' '-'
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%left '*' '/'
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%right UNARY INCREMENT DECREMENT
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%right ARROW '.' '[' '('
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%left '^'
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%token <ssym> BLOCKNAME
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%type <bval> block
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%left COLONCOLON
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%%
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start : { current_type = NULL;
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intvar = NULL;
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search_field = 0;
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leftdiv_is_integer = 0;
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}
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normal_start {}
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;
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normal_start :
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exp1
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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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current_type = $1; } ;
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/* Expressions, including the comma operator. */
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exp1 : exp
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| exp1 ',' exp
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{ write_exp_elt_opcode (pstate, BINOP_COMMA); }
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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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if (current_type)
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current_type = TYPE_TARGET_TYPE (current_type); }
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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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if (current_type)
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current_type = TYPE_POINTER_TYPE (current_type); }
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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 : 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 : INCREMENT '(' exp ')' %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_PREINCREMENT); }
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;
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exp : DECREMENT '(' exp ')' %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_PREDECREMENT); }
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;
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field_exp : exp '.' %prec UNARY
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{ search_field = 1; }
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;
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exp : field_exp FIELDNAME
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{ write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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write_exp_string (pstate, $2);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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search_field = 0;
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if (current_type)
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{
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while (TYPE_CODE (current_type)
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== TYPE_CODE_PTR)
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current_type =
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TYPE_TARGET_TYPE (current_type);
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current_type = lookup_struct_elt_type (
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current_type, $2.ptr, 0);
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}
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}
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;
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exp : field_exp name
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{ write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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write_exp_string (pstate, $2);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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search_field = 0;
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if (current_type)
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{
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while (TYPE_CODE (current_type)
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== TYPE_CODE_PTR)
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current_type =
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TYPE_TARGET_TYPE (current_type);
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current_type = lookup_struct_elt_type (
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current_type, $2.ptr, 0);
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}
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}
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;
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exp : field_exp name COMPLETE
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{ mark_struct_expression (pstate);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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write_exp_string (pstate, $2);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
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;
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exp : field_exp COMPLETE
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{ struct stoken s;
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mark_struct_expression (pstate);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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s.ptr = "";
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s.length = 0;
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write_exp_string (pstate, s);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT); }
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;
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exp : exp '['
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/* We need to save the current_type value. */
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{ const char *arrayname;
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int arrayfieldindex;
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arrayfieldindex = is_pascal_string_type (
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current_type, NULL, NULL,
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NULL, NULL, &arrayname);
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if (arrayfieldindex)
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{
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struct stoken stringsval;
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char *buf;
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buf = (char *) alloca (strlen (arrayname) + 1);
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stringsval.ptr = buf;
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stringsval.length = strlen (arrayname);
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strcpy (buf, arrayname);
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current_type = TYPE_FIELD_TYPE (current_type,
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arrayfieldindex - 1);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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write_exp_string (pstate, stringsval);
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write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
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}
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push_current_type (); }
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exp1 ']'
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{ pop_current_type ();
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write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT);
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if (current_type)
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current_type = TYPE_TARGET_TYPE (current_type); }
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;
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exp : exp '('
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/* This is to save the value of arglist_len
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being accumulated by an outer function call. */
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{ push_current_type ();
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start_arglist (); }
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arglist ')' %prec ARROW
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{ write_exp_elt_opcode (pstate, OP_FUNCALL);
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write_exp_elt_longcst (pstate,
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(LONGEST) end_arglist ());
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write_exp_elt_opcode (pstate, OP_FUNCALL);
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pop_current_type ();
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if (current_type)
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current_type = TYPE_TARGET_TYPE (current_type);
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}
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;
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arglist :
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| exp
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{ arglist_len = 1; }
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| arglist ',' exp %prec ABOVE_COMMA
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{ arglist_len++; }
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;
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exp : type '(' exp ')' %prec UNARY
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{ if (current_type)
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{
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/* Allow automatic dereference of classes. */
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if ((TYPE_CODE (current_type) == TYPE_CODE_PTR)
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&& (TYPE_CODE (TYPE_TARGET_TYPE (current_type)) == TYPE_CODE_STRUCT)
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&& (TYPE_CODE ($1) == TYPE_CODE_STRUCT))
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write_exp_elt_opcode (pstate, UNOP_IND);
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}
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write_exp_elt_opcode (pstate, UNOP_CAST);
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write_exp_elt_type (pstate, $1);
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write_exp_elt_opcode (pstate, UNOP_CAST);
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current_type = $1; }
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;
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exp : '(' exp1 ')'
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{ }
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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_MUL); }
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;
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exp : exp '/' {
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if (current_type && is_integral_type (current_type))
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leftdiv_is_integer = 1;
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}
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exp
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{
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if (leftdiv_is_integer && current_type
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&& is_integral_type (current_type))
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{
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write_exp_elt_opcode (pstate, UNOP_CAST);
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write_exp_elt_type (pstate,
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parse_type (pstate)
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->builtin_long_double);
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current_type
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= parse_type (pstate)->builtin_long_double;
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write_exp_elt_opcode (pstate, UNOP_CAST);
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leftdiv_is_integer = 0;
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}
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write_exp_elt_opcode (pstate, BINOP_DIV);
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}
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;
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exp : exp DIV exp
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{ write_exp_elt_opcode (pstate, BINOP_INTDIV); }
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;
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exp : exp MOD exp
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{ write_exp_elt_opcode (pstate, BINOP_REM); }
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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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||
;
|
||
|
||
exp : exp LSH exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_LSH); }
|
||
;
|
||
|
||
exp : exp RSH exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_RSH); }
|
||
;
|
||
|
||
exp : exp '=' exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_EQUAL);
|
||
current_type = parse_type (pstate)->builtin_bool;
|
||
}
|
||
;
|
||
|
||
exp : exp NOTEQUAL exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_NOTEQUAL);
|
||
current_type = parse_type (pstate)->builtin_bool;
|
||
}
|
||
;
|
||
|
||
exp : exp LEQ exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_LEQ);
|
||
current_type = parse_type (pstate)->builtin_bool;
|
||
}
|
||
;
|
||
|
||
exp : exp GEQ exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_GEQ);
|
||
current_type = parse_type (pstate)->builtin_bool;
|
||
}
|
||
;
|
||
|
||
exp : exp '<' exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_LESS);
|
||
current_type = parse_type (pstate)->builtin_bool;
|
||
}
|
||
;
|
||
|
||
exp : exp '>' exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_GTR);
|
||
current_type = parse_type (pstate)->builtin_bool;
|
||
}
|
||
;
|
||
|
||
exp : exp ANDAND exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
|
||
;
|
||
|
||
exp : exp XOR exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
|
||
;
|
||
|
||
exp : exp OR exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
|
||
;
|
||
|
||
exp : exp ASSIGN exp
|
||
{ write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
|
||
;
|
||
|
||
exp : TRUEKEYWORD
|
||
{ write_exp_elt_opcode (pstate, OP_BOOL);
|
||
write_exp_elt_longcst (pstate, (LONGEST) $1);
|
||
current_type = parse_type (pstate)->builtin_bool;
|
||
write_exp_elt_opcode (pstate, OP_BOOL); }
|
||
;
|
||
|
||
exp : FALSEKEYWORD
|
||
{ write_exp_elt_opcode (pstate, OP_BOOL);
|
||
write_exp_elt_longcst (pstate, (LONGEST) $1);
|
||
current_type = parse_type (pstate)->builtin_bool;
|
||
write_exp_elt_opcode (pstate, OP_BOOL); }
|
||
;
|
||
|
||
exp : INT
|
||
{ write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate, $1.type);
|
||
current_type = $1.type;
|
||
write_exp_elt_longcst (pstate, (LONGEST)($1.val));
|
||
write_exp_elt_opcode (pstate, OP_LONG); }
|
||
;
|
||
|
||
exp : NAME_OR_INT
|
||
{ YYSTYPE val;
|
||
parse_number (pstate, $1.stoken.ptr,
|
||
$1.stoken.length, 0, &val);
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate, val.typed_val_int.type);
|
||
current_type = val.typed_val_int.type;
|
||
write_exp_elt_longcst (pstate, (LONGEST)
|
||
val.typed_val_int.val);
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
}
|
||
;
|
||
|
||
|
||
exp : FLOAT
|
||
{ write_exp_elt_opcode (pstate, OP_FLOAT);
|
||
write_exp_elt_type (pstate, $1.type);
|
||
current_type = $1.type;
|
||
write_exp_elt_floatcst (pstate, $1.val);
|
||
write_exp_elt_opcode (pstate, OP_FLOAT); }
|
||
;
|
||
|
||
exp : variable
|
||
;
|
||
|
||
exp : VARIABLE
|
||
/* Already written by write_dollar_variable.
|
||
Handle current_type. */
|
||
{ if (intvar) {
|
||
struct value * val, * mark;
|
||
|
||
mark = value_mark ();
|
||
val = value_of_internalvar (parse_gdbarch (pstate),
|
||
intvar);
|
||
current_type = value_type (val);
|
||
value_release_to_mark (mark);
|
||
}
|
||
}
|
||
;
|
||
|
||
exp : SIZEOF '(' type ')' %prec UNARY
|
||
{ write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate,
|
||
parse_type (pstate)->builtin_int);
|
||
current_type = parse_type (pstate)->builtin_int;
|
||
$3 = check_typedef ($3);
|
||
write_exp_elt_longcst (pstate,
|
||
(LONGEST) TYPE_LENGTH ($3));
|
||
write_exp_elt_opcode (pstate, OP_LONG); }
|
||
;
|
||
|
||
exp : SIZEOF '(' exp ')' %prec UNARY
|
||
{ write_exp_elt_opcode (pstate, UNOP_SIZEOF);
|
||
current_type = parse_type (pstate)->builtin_int; }
|
||
|
||
exp : STRING
|
||
{ /* C strings are converted into array constants with
|
||
an explicit null byte added at the end. Thus
|
||
the array upper bound is the string length.
|
||
There is no such thing in C as a completely empty
|
||
string. */
|
||
const char *sp = $1.ptr; int count = $1.length;
|
||
|
||
while (count-- > 0)
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate,
|
||
parse_type (pstate)
|
||
->builtin_char);
|
||
write_exp_elt_longcst (pstate,
|
||
(LONGEST) (*sp++));
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
}
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate,
|
||
parse_type (pstate)
|
||
->builtin_char);
|
||
write_exp_elt_longcst (pstate, (LONGEST)'\0');
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_opcode (pstate, OP_ARRAY);
|
||
write_exp_elt_longcst (pstate, (LONGEST) 0);
|
||
write_exp_elt_longcst (pstate,
|
||
(LONGEST) ($1.length));
|
||
write_exp_elt_opcode (pstate, OP_ARRAY); }
|
||
;
|
||
|
||
/* Object pascal */
|
||
exp : THIS
|
||
{
|
||
struct value * this_val;
|
||
struct type * this_type;
|
||
write_exp_elt_opcode (pstate, OP_THIS);
|
||
write_exp_elt_opcode (pstate, OP_THIS);
|
||
/* We need type of this. */
|
||
this_val
|
||
= value_of_this_silent (parse_language (pstate));
|
||
if (this_val)
|
||
this_type = value_type (this_val);
|
||
else
|
||
this_type = NULL;
|
||
if (this_type)
|
||
{
|
||
if (TYPE_CODE (this_type) == TYPE_CODE_PTR)
|
||
{
|
||
this_type = TYPE_TARGET_TYPE (this_type);
|
||
write_exp_elt_opcode (pstate, UNOP_IND);
|
||
}
|
||
}
|
||
|
||
current_type = this_type;
|
||
}
|
||
;
|
||
|
||
/* end of object pascal. */
|
||
|
||
block : BLOCKNAME
|
||
{
|
||
if ($1.sym.symbol != 0)
|
||
$$ = SYMBOL_BLOCK_VALUE ($1.sym.symbol);
|
||
else
|
||
{
|
||
struct symtab *tem =
|
||
lookup_symtab (copy_name ($1.stoken));
|
||
if (tem)
|
||
$$ = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (tem),
|
||
STATIC_BLOCK);
|
||
else
|
||
error (_("No file or function \"%s\"."),
|
||
copy_name ($1.stoken));
|
||
}
|
||
}
|
||
;
|
||
|
||
block : block COLONCOLON name
|
||
{ struct symbol *tem
|
||
= lookup_symbol (copy_name ($3), $1,
|
||
VAR_DOMAIN, NULL).symbol;
|
||
|
||
if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
|
||
error (_("No function \"%s\" in specified context."),
|
||
copy_name ($3));
|
||
$$ = SYMBOL_BLOCK_VALUE (tem); }
|
||
;
|
||
|
||
variable: block COLONCOLON name
|
||
{ struct block_symbol sym;
|
||
|
||
sym = lookup_symbol (copy_name ($3), $1,
|
||
VAR_DOMAIN, NULL);
|
||
if (sym.symbol == 0)
|
||
error (_("No symbol \"%s\" in specified context."),
|
||
copy_name ($3));
|
||
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
|
||
write_exp_elt_block (pstate, sym.block);
|
||
write_exp_elt_sym (pstate, sym.symbol);
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE); }
|
||
;
|
||
|
||
qualified_name: typebase COLONCOLON name
|
||
{
|
||
struct type *type = $1;
|
||
|
||
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
|
||
&& TYPE_CODE (type) != TYPE_CODE_UNION)
|
||
error (_("`%s' is not defined as an aggregate type."),
|
||
TYPE_NAME (type));
|
||
|
||
write_exp_elt_opcode (pstate, OP_SCOPE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_string (pstate, $3);
|
||
write_exp_elt_opcode (pstate, OP_SCOPE);
|
||
}
|
||
;
|
||
|
||
variable: qualified_name
|
||
| COLONCOLON name
|
||
{
|
||
char *name = copy_name ($2);
|
||
struct symbol *sym;
|
||
struct bound_minimal_symbol msymbol;
|
||
|
||
sym =
|
||
lookup_symbol (name, (const struct block *) NULL,
|
||
VAR_DOMAIN, NULL).symbol;
|
||
if (sym)
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
|
||
write_exp_elt_block (pstate, NULL);
|
||
write_exp_elt_sym (pstate, sym);
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
|
||
break;
|
||
}
|
||
|
||
msymbol = lookup_bound_minimal_symbol (name);
|
||
if (msymbol.minsym != NULL)
|
||
write_exp_msymbol (pstate, msymbol);
|
||
else if (!have_full_symbols ()
|
||
&& !have_partial_symbols ())
|
||
error (_("No symbol table is loaded. "
|
||
"Use the \"file\" command."));
|
||
else
|
||
error (_("No symbol \"%s\" in current context."),
|
||
name);
|
||
}
|
||
;
|
||
|
||
variable: name_not_typename
|
||
{ struct block_symbol sym = $1.sym;
|
||
|
||
if (sym.symbol)
|
||
{
|
||
if (symbol_read_needs_frame (sym.symbol))
|
||
{
|
||
if (innermost_block == 0
|
||
|| contained_in (sym.block,
|
||
innermost_block))
|
||
innermost_block = sym.block;
|
||
}
|
||
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
|
||
write_exp_elt_block (pstate, sym.block);
|
||
write_exp_elt_sym (pstate, sym.symbol);
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
|
||
current_type = sym.symbol->type; }
|
||
else if ($1.is_a_field_of_this)
|
||
{
|
||
struct value * this_val;
|
||
struct type * this_type;
|
||
/* Object pascal: it hangs off of `this'. Must
|
||
not inadvertently convert from a method call
|
||
to data ref. */
|
||
if (innermost_block == 0
|
||
|| contained_in (sym.block,
|
||
innermost_block))
|
||
innermost_block = sym.block;
|
||
write_exp_elt_opcode (pstate, OP_THIS);
|
||
write_exp_elt_opcode (pstate, OP_THIS);
|
||
write_exp_elt_opcode (pstate, STRUCTOP_PTR);
|
||
write_exp_string (pstate, $1.stoken);
|
||
write_exp_elt_opcode (pstate, STRUCTOP_PTR);
|
||
/* We need type of this. */
|
||
this_val
|
||
= value_of_this_silent (parse_language (pstate));
|
||
if (this_val)
|
||
this_type = value_type (this_val);
|
||
else
|
||
this_type = NULL;
|
||
if (this_type)
|
||
current_type = lookup_struct_elt_type (
|
||
this_type,
|
||
copy_name ($1.stoken), 0);
|
||
else
|
||
current_type = NULL;
|
||
}
|
||
else
|
||
{
|
||
struct bound_minimal_symbol msymbol;
|
||
char *arg = copy_name ($1.stoken);
|
||
|
||
msymbol =
|
||
lookup_bound_minimal_symbol (arg);
|
||
if (msymbol.minsym != NULL)
|
||
write_exp_msymbol (pstate, msymbol);
|
||
else if (!have_full_symbols ()
|
||
&& !have_partial_symbols ())
|
||
error (_("No symbol table is loaded. "
|
||
"Use the \"file\" command."));
|
||
else
|
||
error (_("No symbol \"%s\" in current context."),
|
||
copy_name ($1.stoken));
|
||
}
|
||
}
|
||
;
|
||
|
||
|
||
ptype : typebase
|
||
;
|
||
|
||
/* We used to try to recognize more pointer to member types here, but
|
||
that didn't work (shift/reduce conflicts meant that these rules never
|
||
got executed). The problem is that
|
||
int (foo::bar::baz::bizzle)
|
||
is a function type but
|
||
int (foo::bar::baz::bizzle::*)
|
||
is a pointer to member type. Stroustrup loses again! */
|
||
|
||
type : ptype
|
||
;
|
||
|
||
typebase /* Implements (approximately): (type-qualifier)* type-specifier */
|
||
: '^' typebase
|
||
{ $$ = lookup_pointer_type ($2); }
|
||
| TYPENAME
|
||
{ $$ = $1.type; }
|
||
| STRUCT name
|
||
{ $$ = lookup_struct (copy_name ($2),
|
||
expression_context_block); }
|
||
| CLASS name
|
||
{ $$ = lookup_struct (copy_name ($2),
|
||
expression_context_block); }
|
||
/* "const" and "volatile" are curently ignored. A type qualifier
|
||
after the type is handled in the ptype rule. I think these could
|
||
be too. */
|
||
;
|
||
|
||
name : NAME { $$ = $1.stoken; }
|
||
| BLOCKNAME { $$ = $1.stoken; }
|
||
| TYPENAME { $$ = $1.stoken; }
|
||
| NAME_OR_INT { $$ = $1.stoken; }
|
||
;
|
||
|
||
name_not_typename : NAME
|
||
| BLOCKNAME
|
||
/* 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)
|
||
{
|
||
/* FIXME: Shouldn't these be unsigned? We don't deal with negative values
|
||
here, and we do kind of silly things like cast to unsigned. */
|
||
LONGEST n = 0;
|
||
LONGEST prevn = 0;
|
||
ULONGEST un;
|
||
|
||
int i = 0;
|
||
int c;
|
||
int base = input_radix;
|
||
int unsigned_p = 0;
|
||
|
||
/* Number of "L" suffixes encountered. */
|
||
int long_p = 0;
|
||
|
||
/* We have found a "L" or "U" suffix. */
|
||
int found_suffix = 0;
|
||
|
||
ULONGEST high_bit;
|
||
struct type *signed_type;
|
||
struct type *unsigned_type;
|
||
|
||
if (parsed_float)
|
||
{
|
||
/* Handle suffixes: 'f' for float, 'l' for long double.
|
||
FIXME: This appears to be an extension -- do we want this? */
|
||
if (len >= 1 && tolower (p[len - 1]) == 'f')
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_type (par_state)->builtin_float;
|
||
len--;
|
||
}
|
||
else if (len >= 1 && tolower (p[len - 1]) == 'l')
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_type (par_state)->builtin_long_double;
|
||
len--;
|
||
}
|
||
/* Default type for floating-point literals is double. */
|
||
else
|
||
{
|
||
putithere->typed_val_float.type
|
||
= parse_type (par_state)->builtin_double;
|
||
}
|
||
|
||
if (!parse_float (p, len,
|
||
putithere->typed_val_float.type,
|
||
putithere->typed_val_float.val))
|
||
return ERROR;
|
||
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 (c >= 'A' && c <= 'Z')
|
||
c += 'a' - 'A';
|
||
if (c != 'l' && c != 'u')
|
||
n *= base;
|
||
if (c >= '0' && c <= '9')
|
||
{
|
||
if (found_suffix)
|
||
return ERROR;
|
||
n += i = c - '0';
|
||
}
|
||
else
|
||
{
|
||
if (base > 10 && c >= 'a' && c <= 'f')
|
||
{
|
||
if (found_suffix)
|
||
return ERROR;
|
||
n += i = c - 'a' + 10;
|
||
}
|
||
else if (c == 'l')
|
||
{
|
||
++long_p;
|
||
found_suffix = 1;
|
||
}
|
||
else if (c == 'u')
|
||
{
|
||
unsigned_p = 1;
|
||
found_suffix = 1;
|
||
}
|
||
else
|
||
return ERROR; /* Char not a digit */
|
||
}
|
||
if (i >= base)
|
||
return ERROR; /* Invalid digit in this base. */
|
||
|
||
/* Portably test for overflow (only works for nonzero values, so make
|
||
a second check for zero). FIXME: Can't we just make n and prevn
|
||
unsigned and avoid this? */
|
||
if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
|
||
unsigned_p = 1; /* Try something unsigned. */
|
||
|
||
/* Portably test for unsigned overflow.
|
||
FIXME: This check is wrong; for example it doesn't find overflow
|
||
on 0x123456789 when LONGEST is 32 bits. */
|
||
if (c != 'l' && c != 'u' && n != 0)
|
||
{
|
||
if ((unsigned_p && (ULONGEST) prevn >= (ULONGEST) n))
|
||
error (_("Numeric constant too large."));
|
||
}
|
||
prevn = n;
|
||
}
|
||
|
||
/* An integer constant is an int, a long, or a long long. An L
|
||
suffix forces it to be long; an LL suffix forces it to be long
|
||
long. If not forced to a larger size, it gets the first type of
|
||
the above that it fits in. To figure out whether it fits, we
|
||
shift it right and see whether anything remains. Note that we
|
||
can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
|
||
operation, because many compilers will warn about such a shift
|
||
(which always produces a zero result). Sometimes gdbarch_int_bit
|
||
or gdbarch_long_bit will be that big, sometimes not. To deal with
|
||
the case where it is we just always shift the value more than
|
||
once, with fewer bits each time. */
|
||
|
||
un = (ULONGEST)n >> 2;
|
||
if (long_p == 0
|
||
&& (un >> (gdbarch_int_bit (parse_gdbarch (par_state)) - 2)) == 0)
|
||
{
|
||
high_bit
|
||
= ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch (par_state)) - 1);
|
||
|
||
/* A large decimal (not hex or octal) constant (between INT_MAX
|
||
and UINT_MAX) is a long or unsigned long, according to ANSI,
|
||
never an unsigned int, but this code treats it as unsigned
|
||
int. This probably should be fixed. GCC gives a warning on
|
||
such constants. */
|
||
|
||
unsigned_type = parse_type (par_state)->builtin_unsigned_int;
|
||
signed_type = parse_type (par_state)->builtin_int;
|
||
}
|
||
else if (long_p <= 1
|
||
&& (un >> (gdbarch_long_bit (parse_gdbarch (par_state)) - 2)) == 0)
|
||
{
|
||
high_bit
|
||
= ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch (par_state)) - 1);
|
||
unsigned_type = parse_type (par_state)->builtin_unsigned_long;
|
||
signed_type = parse_type (par_state)->builtin_long;
|
||
}
|
||
else
|
||
{
|
||
int shift;
|
||
if (sizeof (ULONGEST) * HOST_CHAR_BIT
|
||
< gdbarch_long_long_bit (parse_gdbarch (par_state)))
|
||
/* A long long does not fit in a LONGEST. */
|
||
shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
|
||
else
|
||
shift = (gdbarch_long_long_bit (parse_gdbarch (par_state)) - 1);
|
||
high_bit = (ULONGEST) 1 << shift;
|
||
unsigned_type = parse_type (par_state)->builtin_unsigned_long_long;
|
||
signed_type = parse_type (par_state)->builtin_long_long;
|
||
}
|
||
|
||
putithere->typed_val_int.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_int.type = unsigned_type;
|
||
}
|
||
else
|
||
{
|
||
putithere->typed_val_int.type = signed_type;
|
||
}
|
||
|
||
return INT;
|
||
}
|
||
|
||
|
||
struct type_push
|
||
{
|
||
struct type *stored;
|
||
struct type_push *next;
|
||
};
|
||
|
||
static struct type_push *tp_top = NULL;
|
||
|
||
static void
|
||
push_current_type (void)
|
||
{
|
||
struct type_push *tpnew;
|
||
tpnew = (struct type_push *) malloc (sizeof (struct type_push));
|
||
tpnew->next = tp_top;
|
||
tpnew->stored = current_type;
|
||
current_type = NULL;
|
||
tp_top = tpnew;
|
||
}
|
||
|
||
static void
|
||
pop_current_type (void)
|
||
{
|
||
struct type_push *tp = tp_top;
|
||
if (tp)
|
||
{
|
||
current_type = tp->stored;
|
||
tp_top = tp->next;
|
||
free (tp);
|
||
}
|
||
}
|
||
|
||
struct token
|
||
{
|
||
const char *oper;
|
||
int token;
|
||
enum exp_opcode opcode;
|
||
};
|
||
|
||
static const struct token tokentab3[] =
|
||
{
|
||
{"shr", RSH, BINOP_END},
|
||
{"shl", LSH, BINOP_END},
|
||
{"and", ANDAND, BINOP_END},
|
||
{"div", DIV, BINOP_END},
|
||
{"not", NOT, BINOP_END},
|
||
{"mod", MOD, BINOP_END},
|
||
{"inc", INCREMENT, BINOP_END},
|
||
{"dec", DECREMENT, BINOP_END},
|
||
{"xor", XOR, BINOP_END}
|
||
};
|
||
|
||
static const struct token tokentab2[] =
|
||
{
|
||
{"or", OR, BINOP_END},
|
||
{"<>", NOTEQUAL, BINOP_END},
|
||
{"<=", LEQ, BINOP_END},
|
||
{">=", GEQ, BINOP_END},
|
||
{":=", ASSIGN, BINOP_END},
|
||
{"::", COLONCOLON, BINOP_END} };
|
||
|
||
/* Allocate uppercased var: */
|
||
/* make an uppercased copy of tokstart. */
|
||
static char *
|
||
uptok (const char *tokstart, int namelen)
|
||
{
|
||
int i;
|
||
char *uptokstart = (char *)malloc(namelen+1);
|
||
for (i = 0;i <= namelen;i++)
|
||
{
|
||
if ((tokstart[i]>='a' && tokstart[i]<='z'))
|
||
uptokstart[i] = tokstart[i]-('a'-'A');
|
||
else
|
||
uptokstart[i] = tokstart[i];
|
||
}
|
||
uptokstart[namelen]='\0';
|
||
return uptokstart;
|
||
}
|
||
|
||
/* Read one token, getting characters through lexptr. */
|
||
|
||
static int
|
||
yylex (void)
|
||
{
|
||
int c;
|
||
int namelen;
|
||
unsigned int i;
|
||
const char *tokstart;
|
||
char *uptokstart;
|
||
const char *tokptr;
|
||
int explen, tempbufindex;
|
||
static char *tempbuf;
|
||
static int tempbufsize;
|
||
|
||
retry:
|
||
|
||
prev_lexptr = lexptr;
|
||
|
||
tokstart = lexptr;
|
||
explen = strlen (lexptr);
|
||
|
||
/* See if it is a special token of length 3. */
|
||
if (explen > 2)
|
||
for (i = 0; i < sizeof (tokentab3) / sizeof (tokentab3[0]); i++)
|
||
if (strncasecmp (tokstart, tokentab3[i].oper, 3) == 0
|
||
&& (!isalpha (tokentab3[i].oper[0]) || explen == 3
|
||
|| (!isalpha (tokstart[3])
|
||
&& !isdigit (tokstart[3]) && tokstart[3] != '_')))
|
||
{
|
||
lexptr += 3;
|
||
yylval.opcode = tokentab3[i].opcode;
|
||
return tokentab3[i].token;
|
||
}
|
||
|
||
/* See if it is a special token of length 2. */
|
||
if (explen > 1)
|
||
for (i = 0; i < sizeof (tokentab2) / sizeof (tokentab2[0]); i++)
|
||
if (strncasecmp (tokstart, tokentab2[i].oper, 2) == 0
|
||
&& (!isalpha (tokentab2[i].oper[0]) || explen == 2
|
||
|| (!isalpha (tokstart[2])
|
||
&& !isdigit (tokstart[2]) && tokstart[2] != '_')))
|
||
{
|
||
lexptr += 2;
|
||
yylval.opcode = tokentab2[i].opcode;
|
||
return tokentab2[i].token;
|
||
}
|
||
|
||
switch (c = *tokstart)
|
||
{
|
||
case 0:
|
||
if (search_field && parse_completion)
|
||
return COMPLETE;
|
||
else
|
||
return 0;
|
||
|
||
case ' ':
|
||
case '\t':
|
||
case '\n':
|
||
lexptr++;
|
||
goto retry;
|
||
|
||
case '\'':
|
||
/* We either have a character constant ('0' or '\177' for example)
|
||
or we have a quoted symbol reference ('foo(int,int)' in object pascal
|
||
for example). */
|
||
lexptr++;
|
||
c = *lexptr++;
|
||
if (c == '\\')
|
||
c = parse_escape (parse_gdbarch (pstate), &lexptr);
|
||
else if (c == '\'')
|
||
error (_("Empty character constant."));
|
||
|
||
yylval.typed_val_int.val = c;
|
||
yylval.typed_val_int.type = parse_type (pstate)->builtin_char;
|
||
|
||
c = *lexptr++;
|
||
if (c != '\'')
|
||
{
|
||
namelen = skip_quoted (tokstart) - tokstart;
|
||
if (namelen > 2)
|
||
{
|
||
lexptr = tokstart + namelen;
|
||
if (lexptr[-1] != '\'')
|
||
error (_("Unmatched single quote."));
|
||
namelen -= 2;
|
||
tokstart++;
|
||
uptokstart = uptok(tokstart,namelen);
|
||
goto tryname;
|
||
}
|
||
error (_("Invalid character constant."));
|
||
}
|
||
return INT;
|
||
|
||
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, 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)
|
||
{
|
||
/* This test includes !hex because 'e' is a valid hex digit
|
||
and thus does not indicate a floating point number when
|
||
the radix is hex. */
|
||
if (!hex && !got_e && (*p == 'e' || *p == 'E'))
|
||
got_dot = got_e = 1;
|
||
/* This test does not include !hex, because a '.' always indicates
|
||
a decimal floating point number regardless of the radix. */
|
||
else if (!got_dot && *p == '.')
|
||
got_dot = 1;
|
||
else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
|
||
&& (*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, &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 '}':
|
||
symbol:
|
||
lexptr++;
|
||
return c;
|
||
|
||
case '"':
|
||
|
||
/* Build the gdb internal form of the input string in tempbuf,
|
||
translating any standard C escape forms seen. Note that the
|
||
buffer is null byte terminated *only* for the convenience of
|
||
debugging gdb itself and printing the buffer contents when
|
||
the buffer contains no embedded nulls. Gdb does not depend
|
||
upon the buffer being null byte terminated, it uses the length
|
||
string instead. This allows gdb to handle C strings (as well
|
||
as strings in other languages) with embedded null bytes. */
|
||
|
||
tokptr = ++tokstart;
|
||
tempbufindex = 0;
|
||
|
||
do {
|
||
/* Grow the static temp buffer if necessary, including allocating
|
||
the first one on demand. */
|
||
if (tempbufindex + 1 >= tempbufsize)
|
||
{
|
||
tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
|
||
}
|
||
|
||
switch (*tokptr)
|
||
{
|
||
case '\0':
|
||
case '"':
|
||
/* Do nothing, loop will terminate. */
|
||
break;
|
||
case '\\':
|
||
++tokptr;
|
||
c = parse_escape (parse_gdbarch (pstate), &tokptr);
|
||
if (c == -1)
|
||
{
|
||
continue;
|
||
}
|
||
tempbuf[tempbufindex++] = c;
|
||
break;
|
||
default:
|
||
tempbuf[tempbufindex++] = *tokptr++;
|
||
break;
|
||
}
|
||
} while ((*tokptr != '"') && (*tokptr != '\0'));
|
||
if (*tokptr++ != '"')
|
||
{
|
||
error (_("Unterminated string in expression."));
|
||
}
|
||
tempbuf[tempbufindex] = '\0'; /* See note above. */
|
||
yylval.sval.ptr = tempbuf;
|
||
yylval.sval.length = tempbufindex;
|
||
lexptr = tokptr;
|
||
return (STRING);
|
||
}
|
||
|
||
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);
|
||
|
||
/* It's a name. See how long it is. */
|
||
namelen = 0;
|
||
for (c = tokstart[namelen];
|
||
(c == '_' || c == '$' || (c >= '0' && c <= '9')
|
||
|| (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
|
||
{
|
||
/* Template parameter lists are part of the name.
|
||
FIXME: This mishandles `print $a<4&&$a>3'. */
|
||
if (c == '<')
|
||
{
|
||
int i = namelen;
|
||
int nesting_level = 1;
|
||
while (tokstart[++i])
|
||
{
|
||
if (tokstart[i] == '<')
|
||
nesting_level++;
|
||
else if (tokstart[i] == '>')
|
||
{
|
||
if (--nesting_level == 0)
|
||
break;
|
||
}
|
||
}
|
||
if (tokstart[i] == '>')
|
||
namelen = i;
|
||
else
|
||
break;
|
||
}
|
||
|
||
/* do NOT uppercase internals because of registers !!! */
|
||
c = tokstart[++namelen];
|
||
}
|
||
|
||
uptokstart = uptok(tokstart,namelen);
|
||
|
||
/* The token "if" terminates the expression and is NOT
|
||
removed from the input stream. */
|
||
if (namelen == 2 && uptokstart[0] == 'I' && uptokstart[1] == 'F')
|
||
{
|
||
free (uptokstart);
|
||
return 0;
|
||
}
|
||
|
||
lexptr += namelen;
|
||
|
||
tryname:
|
||
|
||
/* Catch specific keywords. Should be done with a data structure. */
|
||
switch (namelen)
|
||
{
|
||
case 6:
|
||
if (strcmp (uptokstart, "OBJECT") == 0)
|
||
{
|
||
free (uptokstart);
|
||
return CLASS;
|
||
}
|
||
if (strcmp (uptokstart, "RECORD") == 0)
|
||
{
|
||
free (uptokstart);
|
||
return STRUCT;
|
||
}
|
||
if (strcmp (uptokstart, "SIZEOF") == 0)
|
||
{
|
||
free (uptokstart);
|
||
return SIZEOF;
|
||
}
|
||
break;
|
||
case 5:
|
||
if (strcmp (uptokstart, "CLASS") == 0)
|
||
{
|
||
free (uptokstart);
|
||
return CLASS;
|
||
}
|
||
if (strcmp (uptokstart, "FALSE") == 0)
|
||
{
|
||
yylval.lval = 0;
|
||
free (uptokstart);
|
||
return FALSEKEYWORD;
|
||
}
|
||
break;
|
||
case 4:
|
||
if (strcmp (uptokstart, "TRUE") == 0)
|
||
{
|
||
yylval.lval = 1;
|
||
free (uptokstart);
|
||
return TRUEKEYWORD;
|
||
}
|
||
if (strcmp (uptokstart, "SELF") == 0)
|
||
{
|
||
/* Here we search for 'this' like
|
||
inserted in FPC stabs debug info. */
|
||
static const char this_name[] = "this";
|
||
|
||
if (lookup_symbol (this_name, expression_context_block,
|
||
VAR_DOMAIN, NULL).symbol)
|
||
{
|
||
free (uptokstart);
|
||
return THIS;
|
||
}
|
||
}
|
||
break;
|
||
default:
|
||
break;
|
||
}
|
||
|
||
yylval.sval.ptr = tokstart;
|
||
yylval.sval.length = namelen;
|
||
|
||
if (*tokstart == '$')
|
||
{
|
||
char *tmp;
|
||
|
||
/* $ is the normal prefix for pascal hexadecimal values
|
||
but this conflicts with the GDB use for debugger variables
|
||
so in expression to enter hexadecimal values
|
||
we still need to use C syntax with 0xff */
|
||
write_dollar_variable (pstate, yylval.sval);
|
||
tmp = (char *) alloca (namelen + 1);
|
||
memcpy (tmp, tokstart, namelen);
|
||
tmp[namelen] = '\0';
|
||
intvar = lookup_only_internalvar (tmp + 1);
|
||
free (uptokstart);
|
||
return VARIABLE;
|
||
}
|
||
|
||
/* Use token-type BLOCKNAME for symbols that happen to be defined as
|
||
functions or symtabs. If this is not so, then ...
|
||
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;
|
||
struct field_of_this_result is_a_field_of_this;
|
||
int is_a_field = 0;
|
||
int hextype;
|
||
|
||
is_a_field_of_this.type = NULL;
|
||
if (search_field && current_type)
|
||
is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL);
|
||
if (is_a_field)
|
||
sym = NULL;
|
||
else
|
||
sym = lookup_symbol (tmp, expression_context_block,
|
||
VAR_DOMAIN, &is_a_field_of_this).symbol;
|
||
/* second chance uppercased (as Free Pascal does). */
|
||
if (!sym && is_a_field_of_this.type == NULL && !is_a_field)
|
||
{
|
||
for (i = 0; i <= namelen; i++)
|
||
{
|
||
if ((tmp[i] >= 'a' && tmp[i] <= 'z'))
|
||
tmp[i] -= ('a'-'A');
|
||
}
|
||
if (search_field && current_type)
|
||
is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL);
|
||
if (is_a_field)
|
||
sym = NULL;
|
||
else
|
||
sym = lookup_symbol (tmp, expression_context_block,
|
||
VAR_DOMAIN, &is_a_field_of_this).symbol;
|
||
}
|
||
/* Third chance Capitalized (as GPC does). */
|
||
if (!sym && is_a_field_of_this.type == NULL && !is_a_field)
|
||
{
|
||
for (i = 0; i <= namelen; i++)
|
||
{
|
||
if (i == 0)
|
||
{
|
||
if ((tmp[i] >= 'a' && tmp[i] <= 'z'))
|
||
tmp[i] -= ('a'-'A');
|
||
}
|
||
else
|
||
if ((tmp[i] >= 'A' && tmp[i] <= 'Z'))
|
||
tmp[i] -= ('A'-'a');
|
||
}
|
||
if (search_field && current_type)
|
||
is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL);
|
||
if (is_a_field)
|
||
sym = NULL;
|
||
else
|
||
sym = lookup_symbol (tmp, expression_context_block,
|
||
VAR_DOMAIN, &is_a_field_of_this).symbol;
|
||
}
|
||
|
||
if (is_a_field || (is_a_field_of_this.type != NULL))
|
||
{
|
||
tempbuf = (char *) realloc (tempbuf, namelen + 1);
|
||
strncpy (tempbuf, tmp, namelen);
|
||
tempbuf [namelen] = 0;
|
||
yylval.sval.ptr = tempbuf;
|
||
yylval.sval.length = namelen;
|
||
yylval.ssym.sym.symbol = NULL;
|
||
yylval.ssym.sym.block = NULL;
|
||
free (uptokstart);
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
|
||
if (is_a_field)
|
||
return FIELDNAME;
|
||
else
|
||
return NAME;
|
||
}
|
||
/* Call lookup_symtab, not lookup_partial_symtab, in case there are
|
||
no psymtabs (coff, xcoff, or some future change to blow away the
|
||
psymtabs once once symbols are read). */
|
||
if ((sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
|
||
|| lookup_symtab (tmp))
|
||
{
|
||
yylval.ssym.sym.symbol = sym;
|
||
yylval.ssym.sym.block = NULL;
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
|
||
free (uptokstart);
|
||
return BLOCKNAME;
|
||
}
|
||
if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
|
||
{
|
||
#if 1
|
||
/* Despite the following flaw, we need to keep this code enabled.
|
||
Because we can get called from check_stub_method, if we don't
|
||
handle nested types then it screws many operations in any
|
||
program which uses nested types. */
|
||
/* In "A::x", if x is a member function of A and there happens
|
||
to be a type (nested or not, since the stabs don't make that
|
||
distinction) named x, then this code incorrectly thinks we
|
||
are dealing with nested types rather than a member function. */
|
||
|
||
const char *p;
|
||
const char *namestart;
|
||
struct symbol *best_sym;
|
||
|
||
/* Look ahead to detect nested types. This probably should be
|
||
done in the grammar, but trying seemed to introduce a lot
|
||
of shift/reduce and reduce/reduce conflicts. It's possible
|
||
that it could be done, though. Or perhaps a non-grammar, but
|
||
less ad hoc, approach would work well. */
|
||
|
||
/* Since we do not currently have any way of distinguishing
|
||
a nested type from a non-nested one (the stabs don't tell
|
||
us whether a type is nested), we just ignore the
|
||
containing type. */
|
||
|
||
p = lexptr;
|
||
best_sym = sym;
|
||
while (1)
|
||
{
|
||
/* Skip whitespace. */
|
||
while (*p == ' ' || *p == '\t' || *p == '\n')
|
||
++p;
|
||
if (*p == ':' && p[1] == ':')
|
||
{
|
||
/* Skip the `::'. */
|
||
p += 2;
|
||
/* Skip whitespace. */
|
||
while (*p == ' ' || *p == '\t' || *p == '\n')
|
||
++p;
|
||
namestart = p;
|
||
while (*p == '_' || *p == '$' || (*p >= '0' && *p <= '9')
|
||
|| (*p >= 'a' && *p <= 'z')
|
||
|| (*p >= 'A' && *p <= 'Z'))
|
||
++p;
|
||
if (p != namestart)
|
||
{
|
||
struct symbol *cur_sym;
|
||
/* As big as the whole rest of the expression, which is
|
||
at least big enough. */
|
||
char *ncopy
|
||
= (char *) alloca (strlen (tmp) + strlen (namestart)
|
||
+ 3);
|
||
char *tmp1;
|
||
|
||
tmp1 = ncopy;
|
||
memcpy (tmp1, tmp, strlen (tmp));
|
||
tmp1 += strlen (tmp);
|
||
memcpy (tmp1, "::", 2);
|
||
tmp1 += 2;
|
||
memcpy (tmp1, namestart, p - namestart);
|
||
tmp1[p - namestart] = '\0';
|
||
cur_sym = lookup_symbol (ncopy, expression_context_block,
|
||
VAR_DOMAIN, NULL).symbol;
|
||
if (cur_sym)
|
||
{
|
||
if (SYMBOL_CLASS (cur_sym) == LOC_TYPEDEF)
|
||
{
|
||
best_sym = cur_sym;
|
||
lexptr = p;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
else
|
||
break;
|
||
}
|
||
|
||
yylval.tsym.type = SYMBOL_TYPE (best_sym);
|
||
#else /* not 0 */
|
||
yylval.tsym.type = SYMBOL_TYPE (sym);
|
||
#endif /* not 0 */
|
||
free (uptokstart);
|
||
return TYPENAME;
|
||
}
|
||
yylval.tsym.type
|
||
= language_lookup_primitive_type (parse_language (pstate),
|
||
parse_gdbarch (pstate), tmp);
|
||
if (yylval.tsym.type != NULL)
|
||
{
|
||
free (uptokstart);
|
||
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 (pstate, tokstart, namelen, 0, &newlval);
|
||
if (hextype == INT)
|
||
{
|
||
yylval.ssym.sym.symbol = sym;
|
||
yylval.ssym.sym.block = NULL;
|
||
yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
|
||
free (uptokstart);
|
||
return NAME_OR_INT;
|
||
}
|
||
}
|
||
|
||
free(uptokstart);
|
||
/* Any other kind of symbol. */
|
||
yylval.ssym.sym.symbol = sym;
|
||
yylval.ssym.sym.block = NULL;
|
||
return NAME;
|
||
}
|
||
}
|
||
|
||
int
|
||
pascal_parse (struct parser_state *par_state)
|
||
{
|
||
/* Setting up the parser state. */
|
||
scoped_restore pstate_restore = make_scoped_restore (&pstate);
|
||
gdb_assert (par_state != NULL);
|
||
pstate = par_state;
|
||
|
||
return yyparse ();
|
||
}
|
||
|
||
void
|
||
yyerror (const char *msg)
|
||
{
|
||
if (prev_lexptr)
|
||
lexptr = prev_lexptr;
|
||
|
||
error (_("A %s in expression, near `%s'."), (msg ? msg : "error"), lexptr);
|
||
}
|