1 /* YACC parser for Pascal expressions, for GDB.
2 Copyright (C) 2000-2013 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* This file is derived from c-exp.y */
21 /* Parse a Pascal expression from text in a string,
22 and return the result as a struct expression pointer.
23 That structure contains arithmetic operations in reverse polish,
24 with constants represented by operations that are followed by special data.
25 See expression.h for the details of the format.
26 What is important here is that it can be built up sequentially
27 during the process of parsing; the lower levels of the tree always
28 come first in the result.
30 Note that malloc's and realloc's in this file are transformed to
31 xmalloc and xrealloc respectively by the same sed command in the
32 makefile that remaps any other malloc/realloc inserted by the parser
33 generator. Doing this with #defines and trying to control the interaction
34 with include files (<malloc.h> and <stdlib.h> for example) just became
35 too messy, particularly when such includes can be inserted at random
36 times by the parser generator. */
38 /* Known bugs or limitations:
39 - pascal string operations are not supported at all.
40 - there are some problems with boolean types.
41 - Pascal type hexadecimal constants are not supported
42 because they conflict with the internal variables format.
43 Probably also lots of other problems, less well defined PM. */
47 #include "gdb_string.h"
49 #include "expression.h"
51 #include "parser-defs.h"
54 #include "bfd.h" /* Required by objfiles.h. */
55 #include "symfile.h" /* Required by objfiles.h. */
56 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols. */
59 #define parse_type builtin_type (parse_gdbarch)
61 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
62 as well as gratuitiously global symbol names, so we can have multiple
63 yacc generated parsers in gdb. Note that these are only the variables
64 produced by yacc. If other parser generators (bison, byacc, etc) produce
65 additional global names that conflict at link time, then those parser
66 generators need to be fixed instead of adding those names to this list. */
68 #define yymaxdepth pascal_maxdepth
69 #define yyparse pascal_parse
70 #define yylex pascal_lex
71 #define yyerror pascal_error
72 #define yylval pascal_lval
73 #define yychar pascal_char
74 #define yydebug pascal_debug
75 #define yypact pascal_pact
76 #define yyr1 pascal_r1
77 #define yyr2 pascal_r2
78 #define yydef pascal_def
79 #define yychk pascal_chk
80 #define yypgo pascal_pgo
81 #define yyact pascal_act
82 #define yyexca pascal_exca
83 #define yyerrflag pascal_errflag
84 #define yynerrs pascal_nerrs
85 #define yyps pascal_ps
86 #define yypv pascal_pv
88 #define yy_yys pascal_yys
89 #define yystate pascal_state
90 #define yytmp pascal_tmp
92 #define yy_yyv pascal_yyv
93 #define yyval pascal_val
94 #define yylloc pascal_lloc
95 #define yyreds pascal_reds /* With YYDEBUG defined */
96 #define yytoks pascal_toks /* With YYDEBUG defined */
97 #define yyname pascal_name /* With YYDEBUG defined */
98 #define yyrule pascal_rule /* With YYDEBUG defined */
99 #define yylhs pascal_yylhs
100 #define yylen pascal_yylen
101 #define yydefred pascal_yydefred
102 #define yydgoto pascal_yydgoto
103 #define yysindex pascal_yysindex
104 #define yyrindex pascal_yyrindex
105 #define yygindex pascal_yygindex
106 #define yytable pascal_yytable
107 #define yycheck pascal_yycheck
108 #define yyss pascal_yyss
109 #define yysslim pascal_yysslim
110 #define yyssp pascal_yyssp
111 #define yystacksize pascal_yystacksize
112 #define yyvs pascal_yyvs
113 #define yyvsp pascal_yyvsp
116 #define YYDEBUG 1 /* Default to yydebug support */
119 #define YYFPRINTF parser_fprintf
123 static int yylex (void);
125 void yyerror (char *);
127 static char * uptok (char *, int);
130 /* Although the yacc "value" of an expression is not used,
131 since the result is stored in the structure being created,
132 other node types do have values. */
149 struct symtoken ssym;
152 enum exp_opcode opcode;
153 struct internalvar *ivar;
160 /* YYSTYPE gets defined by %union */
161 static int parse_number (char *, int, int, YYSTYPE *);
163 static struct type *current_type;
164 static struct internalvar *intvar;
165 static int leftdiv_is_integer;
166 static void push_current_type (void);
167 static void pop_current_type (void);
168 static int search_field;
171 %type <voidval> exp exp1 type_exp start normal_start variable qualified_name
172 %type <tval> type typebase
173 /* %type <bval> block */
175 /* Fancy type parsing. */
178 %token <typed_val_int> INT
179 %token <typed_val_float> FLOAT
181 /* Both NAME and TYPENAME tokens represent symbols in the input,
182 and both convey their data as strings.
183 But a TYPENAME is a string that happens to be defined as a typedef
184 or builtin type name (such as int or char)
185 and a NAME is any other symbol.
186 Contexts where this distinction is not important can use the
187 nonterminal "name", which matches either NAME or TYPENAME. */
190 %token <sval> FIELDNAME
191 %token <voidval> COMPLETE
192 %token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
193 %token <tsym> TYPENAME
195 %type <ssym> name_not_typename
197 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
198 but which would parse as a valid number in the current input radix.
199 E.g. "c" when input_radix==16. Depending on the parse, it will be
200 turned into a name or into a number. */
202 %token <ssym> NAME_OR_INT
204 %token STRUCT CLASS SIZEOF COLONCOLON
207 /* Special type cases, put in to allow the parser to distinguish different
210 %token <voidval> VARIABLE
215 %token <lval> TRUEKEYWORD FALSEKEYWORD
225 %left '<' '>' LEQ GEQ
226 %left LSH RSH DIV MOD
230 %right UNARY INCREMENT DECREMENT
231 %right ARROW '.' '[' '('
233 %token <ssym> BLOCKNAME
240 start : { current_type = NULL;
243 leftdiv_is_integer = 0;
254 { write_exp_elt_opcode(OP_TYPE);
255 write_exp_elt_type($1);
256 write_exp_elt_opcode(OP_TYPE);
257 current_type = $1; } ;
259 /* Expressions, including the comma operator. */
262 { write_exp_elt_opcode (BINOP_COMMA); }
265 /* Expressions, not including the comma operator. */
266 exp : exp '^' %prec UNARY
267 { write_exp_elt_opcode (UNOP_IND);
269 current_type = TYPE_TARGET_TYPE (current_type); }
272 exp : '@' exp %prec UNARY
273 { write_exp_elt_opcode (UNOP_ADDR);
275 current_type = TYPE_POINTER_TYPE (current_type); }
278 exp : '-' exp %prec UNARY
279 { write_exp_elt_opcode (UNOP_NEG); }
282 exp : NOT exp %prec UNARY
283 { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
286 exp : INCREMENT '(' exp ')' %prec UNARY
287 { write_exp_elt_opcode (UNOP_PREINCREMENT); }
290 exp : DECREMENT '(' exp ')' %prec UNARY
291 { write_exp_elt_opcode (UNOP_PREDECREMENT); }
295 field_exp : exp '.' %prec UNARY
296 { search_field = 1; }
299 exp : field_exp FIELDNAME
300 { write_exp_elt_opcode (STRUCTOP_STRUCT);
301 write_exp_string ($2);
302 write_exp_elt_opcode (STRUCTOP_STRUCT);
306 while (TYPE_CODE (current_type)
309 TYPE_TARGET_TYPE (current_type);
310 current_type = lookup_struct_elt_type (
311 current_type, $2.ptr, 0);
318 { mark_struct_expression ();
319 write_exp_elt_opcode (STRUCTOP_STRUCT);
320 write_exp_string ($2);
321 write_exp_elt_opcode (STRUCTOP_STRUCT);
325 while (TYPE_CODE (current_type)
328 TYPE_TARGET_TYPE (current_type);
329 current_type = lookup_struct_elt_type (
330 current_type, $2.ptr, 0);
335 exp : field_exp COMPLETE
337 mark_struct_expression ();
338 write_exp_elt_opcode (STRUCTOP_STRUCT);
341 write_exp_string (s);
342 write_exp_elt_opcode (STRUCTOP_STRUCT); }
346 /* We need to save the current_type value. */
347 { const char *arrayname;
349 arrayfieldindex = is_pascal_string_type (
350 current_type, NULL, NULL,
351 NULL, NULL, &arrayname);
354 struct stoken stringsval;
355 stringsval.ptr = alloca (strlen (arrayname) + 1);
356 stringsval.length = strlen (arrayname);
357 strcpy (stringsval.ptr, arrayname);
358 current_type = TYPE_FIELD_TYPE (current_type,
359 arrayfieldindex - 1);
360 write_exp_elt_opcode (STRUCTOP_STRUCT);
361 write_exp_string (stringsval);
362 write_exp_elt_opcode (STRUCTOP_STRUCT);
364 push_current_type (); }
366 { pop_current_type ();
367 write_exp_elt_opcode (BINOP_SUBSCRIPT);
369 current_type = TYPE_TARGET_TYPE (current_type); }
373 /* This is to save the value of arglist_len
374 being accumulated by an outer function call. */
375 { push_current_type ();
377 arglist ')' %prec ARROW
378 { write_exp_elt_opcode (OP_FUNCALL);
379 write_exp_elt_longcst ((LONGEST) end_arglist ());
380 write_exp_elt_opcode (OP_FUNCALL);
383 current_type = TYPE_TARGET_TYPE (current_type);
390 | arglist ',' exp %prec ABOVE_COMMA
394 exp : type '(' exp ')' %prec UNARY
397 /* Allow automatic dereference of classes. */
398 if ((TYPE_CODE (current_type) == TYPE_CODE_PTR)
399 && (TYPE_CODE (TYPE_TARGET_TYPE (current_type)) == TYPE_CODE_CLASS)
400 && (TYPE_CODE ($1) == TYPE_CODE_CLASS))
401 write_exp_elt_opcode (UNOP_IND);
403 write_exp_elt_opcode (UNOP_CAST);
404 write_exp_elt_type ($1);
405 write_exp_elt_opcode (UNOP_CAST);
413 /* Binary operators in order of decreasing precedence. */
416 { write_exp_elt_opcode (BINOP_MUL); }
420 if (current_type && is_integral_type (current_type))
421 leftdiv_is_integer = 1;
425 if (leftdiv_is_integer && current_type
426 && is_integral_type (current_type))
428 write_exp_elt_opcode (UNOP_CAST);
429 write_exp_elt_type (parse_type->builtin_long_double);
430 current_type = parse_type->builtin_long_double;
431 write_exp_elt_opcode (UNOP_CAST);
432 leftdiv_is_integer = 0;
435 write_exp_elt_opcode (BINOP_DIV);
440 { write_exp_elt_opcode (BINOP_INTDIV); }
444 { write_exp_elt_opcode (BINOP_REM); }
448 { write_exp_elt_opcode (BINOP_ADD); }
452 { write_exp_elt_opcode (BINOP_SUB); }
456 { write_exp_elt_opcode (BINOP_LSH); }
460 { write_exp_elt_opcode (BINOP_RSH); }
464 { write_exp_elt_opcode (BINOP_EQUAL);
465 current_type = parse_type->builtin_bool;
469 exp : exp NOTEQUAL exp
470 { write_exp_elt_opcode (BINOP_NOTEQUAL);
471 current_type = parse_type->builtin_bool;
476 { write_exp_elt_opcode (BINOP_LEQ);
477 current_type = parse_type->builtin_bool;
482 { write_exp_elt_opcode (BINOP_GEQ);
483 current_type = parse_type->builtin_bool;
488 { write_exp_elt_opcode (BINOP_LESS);
489 current_type = parse_type->builtin_bool;
494 { write_exp_elt_opcode (BINOP_GTR);
495 current_type = parse_type->builtin_bool;
500 { write_exp_elt_opcode (BINOP_BITWISE_AND); }
504 { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
508 { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
512 { write_exp_elt_opcode (BINOP_ASSIGN); }
516 { write_exp_elt_opcode (OP_BOOL);
517 write_exp_elt_longcst ((LONGEST) $1);
518 current_type = parse_type->builtin_bool;
519 write_exp_elt_opcode (OP_BOOL); }
523 { write_exp_elt_opcode (OP_BOOL);
524 write_exp_elt_longcst ((LONGEST) $1);
525 current_type = parse_type->builtin_bool;
526 write_exp_elt_opcode (OP_BOOL); }
530 { write_exp_elt_opcode (OP_LONG);
531 write_exp_elt_type ($1.type);
532 current_type = $1.type;
533 write_exp_elt_longcst ((LONGEST)($1.val));
534 write_exp_elt_opcode (OP_LONG); }
539 parse_number ($1.stoken.ptr,
540 $1.stoken.length, 0, &val);
541 write_exp_elt_opcode (OP_LONG);
542 write_exp_elt_type (val.typed_val_int.type);
543 current_type = val.typed_val_int.type;
544 write_exp_elt_longcst ((LONGEST)
545 val.typed_val_int.val);
546 write_exp_elt_opcode (OP_LONG);
552 { write_exp_elt_opcode (OP_DOUBLE);
553 write_exp_elt_type ($1.type);
554 current_type = $1.type;
555 write_exp_elt_dblcst ($1.dval);
556 write_exp_elt_opcode (OP_DOUBLE); }
563 /* Already written by write_dollar_variable.
564 Handle current_type. */
566 struct value * val, * mark;
568 mark = value_mark ();
569 val = value_of_internalvar (parse_gdbarch,
571 current_type = value_type (val);
572 value_release_to_mark (mark);
577 exp : SIZEOF '(' type ')' %prec UNARY
578 { write_exp_elt_opcode (OP_LONG);
579 write_exp_elt_type (parse_type->builtin_int);
581 write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
582 write_exp_elt_opcode (OP_LONG); }
585 exp : SIZEOF '(' exp ')' %prec UNARY
586 { write_exp_elt_opcode (UNOP_SIZEOF); }
589 { /* C strings are converted into array constants with
590 an explicit null byte added at the end. Thus
591 the array upper bound is the string length.
592 There is no such thing in C as a completely empty
594 char *sp = $1.ptr; int count = $1.length;
597 write_exp_elt_opcode (OP_LONG);
598 write_exp_elt_type (parse_type->builtin_char);
599 write_exp_elt_longcst ((LONGEST)(*sp++));
600 write_exp_elt_opcode (OP_LONG);
602 write_exp_elt_opcode (OP_LONG);
603 write_exp_elt_type (parse_type->builtin_char);
604 write_exp_elt_longcst ((LONGEST)'\0');
605 write_exp_elt_opcode (OP_LONG);
606 write_exp_elt_opcode (OP_ARRAY);
607 write_exp_elt_longcst ((LONGEST) 0);
608 write_exp_elt_longcst ((LONGEST) ($1.length));
609 write_exp_elt_opcode (OP_ARRAY); }
615 struct value * this_val;
616 struct type * this_type;
617 write_exp_elt_opcode (OP_THIS);
618 write_exp_elt_opcode (OP_THIS);
619 /* We need type of this. */
620 this_val = value_of_this_silent (parse_language);
622 this_type = value_type (this_val);
627 if (TYPE_CODE (this_type) == TYPE_CODE_PTR)
629 this_type = TYPE_TARGET_TYPE (this_type);
630 write_exp_elt_opcode (UNOP_IND);
634 current_type = this_type;
638 /* end of object pascal. */
643 $$ = SYMBOL_BLOCK_VALUE ($1.sym);
647 lookup_symtab (copy_name ($1.stoken));
649 $$ = BLOCKVECTOR_BLOCK (BLOCKVECTOR (tem),
652 error (_("No file or function \"%s\"."),
653 copy_name ($1.stoken));
658 block : block COLONCOLON name
660 = lookup_symbol (copy_name ($3), $1,
662 if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
663 error (_("No function \"%s\" in specified context."),
665 $$ = SYMBOL_BLOCK_VALUE (tem); }
668 variable: block COLONCOLON name
669 { struct symbol *sym;
670 sym = lookup_symbol (copy_name ($3), $1,
673 error (_("No symbol \"%s\" in specified context."),
676 write_exp_elt_opcode (OP_VAR_VALUE);
677 /* block_found is set by lookup_symbol. */
678 write_exp_elt_block (block_found);
679 write_exp_elt_sym (sym);
680 write_exp_elt_opcode (OP_VAR_VALUE); }
683 qualified_name: typebase COLONCOLON name
685 struct type *type = $1;
686 if (TYPE_CODE (type) != TYPE_CODE_STRUCT
687 && TYPE_CODE (type) != TYPE_CODE_UNION)
688 error (_("`%s' is not defined as an aggregate type."),
691 write_exp_elt_opcode (OP_SCOPE);
692 write_exp_elt_type (type);
693 write_exp_string ($3);
694 write_exp_elt_opcode (OP_SCOPE);
698 variable: qualified_name
701 char *name = copy_name ($2);
703 struct bound_minimal_symbol msymbol;
706 lookup_symbol (name, (const struct block *) NULL,
710 write_exp_elt_opcode (OP_VAR_VALUE);
711 write_exp_elt_block (NULL);
712 write_exp_elt_sym (sym);
713 write_exp_elt_opcode (OP_VAR_VALUE);
717 msymbol = lookup_bound_minimal_symbol (name);
718 if (msymbol.minsym != NULL)
719 write_exp_msymbol (msymbol);
720 else if (!have_full_symbols ()
721 && !have_partial_symbols ())
722 error (_("No symbol table is loaded. "
723 "Use the \"file\" command."));
725 error (_("No symbol \"%s\" in current context."),
730 variable: name_not_typename
731 { struct symbol *sym = $1.sym;
735 if (symbol_read_needs_frame (sym))
737 if (innermost_block == 0
738 || contained_in (block_found,
740 innermost_block = block_found;
743 write_exp_elt_opcode (OP_VAR_VALUE);
744 /* We want to use the selected frame, not
745 another more inner frame which happens to
746 be in the same block. */
747 write_exp_elt_block (NULL);
748 write_exp_elt_sym (sym);
749 write_exp_elt_opcode (OP_VAR_VALUE);
750 current_type = sym->type; }
751 else if ($1.is_a_field_of_this)
753 struct value * this_val;
754 struct type * this_type;
755 /* Object pascal: it hangs off of `this'. Must
756 not inadvertently convert from a method call
758 if (innermost_block == 0
759 || contained_in (block_found,
761 innermost_block = block_found;
762 write_exp_elt_opcode (OP_THIS);
763 write_exp_elt_opcode (OP_THIS);
764 write_exp_elt_opcode (STRUCTOP_PTR);
765 write_exp_string ($1.stoken);
766 write_exp_elt_opcode (STRUCTOP_PTR);
767 /* We need type of this. */
768 this_val = value_of_this_silent (parse_language);
770 this_type = value_type (this_val);
774 current_type = lookup_struct_elt_type (
776 copy_name ($1.stoken), 0);
782 struct bound_minimal_symbol msymbol;
783 char *arg = copy_name ($1.stoken);
786 lookup_bound_minimal_symbol (arg);
787 if (msymbol.minsym != NULL)
788 write_exp_msymbol (msymbol);
789 else if (!have_full_symbols ()
790 && !have_partial_symbols ())
791 error (_("No symbol table is loaded. "
792 "Use the \"file\" command."));
794 error (_("No symbol \"%s\" in current context."),
795 copy_name ($1.stoken));
804 /* We used to try to recognize more pointer to member types here, but
805 that didn't work (shift/reduce conflicts meant that these rules never
806 got executed). The problem is that
807 int (foo::bar::baz::bizzle)
808 is a function type but
809 int (foo::bar::baz::bizzle::*)
810 is a pointer to member type. Stroustrup loses again! */
815 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
817 { $$ = lookup_pointer_type ($2); }
821 { $$ = lookup_struct (copy_name ($2),
822 expression_context_block); }
824 { $$ = lookup_struct (copy_name ($2),
825 expression_context_block); }
826 /* "const" and "volatile" are curently ignored. A type qualifier
827 after the type is handled in the ptype rule. I think these could
831 name : NAME { $$ = $1.stoken; }
832 | BLOCKNAME { $$ = $1.stoken; }
833 | TYPENAME { $$ = $1.stoken; }
834 | NAME_OR_INT { $$ = $1.stoken; }
837 name_not_typename : NAME
839 /* These would be useful if name_not_typename was useful, but it is just
840 a fake for "variable", so these cause reduce/reduce conflicts because
841 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
842 =exp) or just an exp. If name_not_typename was ever used in an lvalue
843 context where only a name could occur, this might be useful.
850 /* Take care of parsing a number (anything that starts with a digit).
851 Set yylval and return the token type; update lexptr.
852 LEN is the number of characters in it. */
854 /*** Needs some error checking for the float case ***/
857 parse_number (char *p, int len, int parsed_float, YYSTYPE *putithere)
859 /* FIXME: Shouldn't these be unsigned? We don't deal with negative values
860 here, and we do kind of silly things like cast to unsigned. */
867 int base = input_radix;
870 /* Number of "L" suffixes encountered. */
873 /* We have found a "L" or "U" suffix. */
874 int found_suffix = 0;
877 struct type *signed_type;
878 struct type *unsigned_type;
882 if (! parse_c_float (parse_gdbarch, p, len,
883 &putithere->typed_val_float.dval,
884 &putithere->typed_val_float.type))
889 /* Handle base-switching prefixes 0x, 0t, 0d, 0. */
923 if (c >= 'A' && c <= 'Z')
925 if (c != 'l' && c != 'u')
927 if (c >= '0' && c <= '9')
935 if (base > 10 && c >= 'a' && c <= 'f')
939 n += i = c - 'a' + 10;
952 return ERROR; /* Char not a digit */
955 return ERROR; /* Invalid digit in this base. */
957 /* Portably test for overflow (only works for nonzero values, so make
958 a second check for zero). FIXME: Can't we just make n and prevn
959 unsigned and avoid this? */
960 if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
961 unsigned_p = 1; /* Try something unsigned. */
963 /* Portably test for unsigned overflow.
964 FIXME: This check is wrong; for example it doesn't find overflow
965 on 0x123456789 when LONGEST is 32 bits. */
966 if (c != 'l' && c != 'u' && n != 0)
968 if ((unsigned_p && (ULONGEST) prevn >= (ULONGEST) n))
969 error (_("Numeric constant too large."));
974 /* An integer constant is an int, a long, or a long long. An L
975 suffix forces it to be long; an LL suffix forces it to be long
976 long. If not forced to a larger size, it gets the first type of
977 the above that it fits in. To figure out whether it fits, we
978 shift it right and see whether anything remains. Note that we
979 can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
980 operation, because many compilers will warn about such a shift
981 (which always produces a zero result). Sometimes gdbarch_int_bit
982 or gdbarch_long_bit will be that big, sometimes not. To deal with
983 the case where it is we just always shift the value more than
984 once, with fewer bits each time. */
986 un = (ULONGEST)n >> 2;
988 && (un >> (gdbarch_int_bit (parse_gdbarch) - 2)) == 0)
990 high_bit = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch) - 1);
992 /* A large decimal (not hex or octal) constant (between INT_MAX
993 and UINT_MAX) is a long or unsigned long, according to ANSI,
994 never an unsigned int, but this code treats it as unsigned
995 int. This probably should be fixed. GCC gives a warning on
998 unsigned_type = parse_type->builtin_unsigned_int;
999 signed_type = parse_type->builtin_int;
1001 else if (long_p <= 1
1002 && (un >> (gdbarch_long_bit (parse_gdbarch) - 2)) == 0)
1004 high_bit = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch) - 1);
1005 unsigned_type = parse_type->builtin_unsigned_long;
1006 signed_type = parse_type->builtin_long;
1011 if (sizeof (ULONGEST) * HOST_CHAR_BIT
1012 < gdbarch_long_long_bit (parse_gdbarch))
1013 /* A long long does not fit in a LONGEST. */
1014 shift = (sizeof (ULONGEST) * HOST_CHAR_BIT - 1);
1016 shift = (gdbarch_long_long_bit (parse_gdbarch) - 1);
1017 high_bit = (ULONGEST) 1 << shift;
1018 unsigned_type = parse_type->builtin_unsigned_long_long;
1019 signed_type = parse_type->builtin_long_long;
1022 putithere->typed_val_int.val = n;
1024 /* If the high bit of the worked out type is set then this number
1025 has to be unsigned. */
1027 if (unsigned_p || (n & high_bit))
1029 putithere->typed_val_int.type = unsigned_type;
1033 putithere->typed_val_int.type = signed_type;
1042 struct type *stored;
1043 struct type_push *next;
1046 static struct type_push *tp_top = NULL;
1049 push_current_type (void)
1051 struct type_push *tpnew;
1052 tpnew = (struct type_push *) malloc (sizeof (struct type_push));
1053 tpnew->next = tp_top;
1054 tpnew->stored = current_type;
1055 current_type = NULL;
1060 pop_current_type (void)
1062 struct type_push *tp = tp_top;
1065 current_type = tp->stored;
1075 enum exp_opcode opcode;
1078 static const struct token tokentab3[] =
1080 {"shr", RSH, BINOP_END},
1081 {"shl", LSH, BINOP_END},
1082 {"and", ANDAND, BINOP_END},
1083 {"div", DIV, BINOP_END},
1084 {"not", NOT, BINOP_END},
1085 {"mod", MOD, BINOP_END},
1086 {"inc", INCREMENT, BINOP_END},
1087 {"dec", DECREMENT, BINOP_END},
1088 {"xor", XOR, BINOP_END}
1091 static const struct token tokentab2[] =
1093 {"or", OR, BINOP_END},
1094 {"<>", NOTEQUAL, BINOP_END},
1095 {"<=", LEQ, BINOP_END},
1096 {">=", GEQ, BINOP_END},
1097 {":=", ASSIGN, BINOP_END},
1098 {"::", COLONCOLON, BINOP_END} };
1100 /* Allocate uppercased var: */
1101 /* make an uppercased copy of tokstart. */
1103 uptok (char *tokstart, int namelen)
1106 char *uptokstart = (char *)malloc(namelen+1);
1107 for (i = 0;i <= namelen;i++)
1109 if ((tokstart[i]>='a' && tokstart[i]<='z'))
1110 uptokstart[i] = tokstart[i]-('a'-'A');
1112 uptokstart[i] = tokstart[i];
1114 uptokstart[namelen]='\0';
1118 /* This is set if the previously-returned token was a structure
1119 operator '.'. This is used only when parsing to
1120 do field name completion. */
1121 static int last_was_structop;
1123 /* Read one token, getting characters through lexptr. */
1134 int explen, tempbufindex;
1135 static char *tempbuf;
1136 static int tempbufsize;
1137 int saw_structop = last_was_structop;
1139 last_was_structop = 0;
1142 prev_lexptr = lexptr;
1145 explen = strlen (lexptr);
1146 /* See if it is a special token of length 3. */
1148 for (i = 0; i < sizeof (tokentab3) / sizeof (tokentab3[0]); i++)
1149 if (strncasecmp (tokstart, tokentab3[i].operator, 3) == 0
1150 && (!isalpha (tokentab3[i].operator[0]) || explen == 3
1151 || (!isalpha (tokstart[3])
1152 && !isdigit (tokstart[3]) && tokstart[3] != '_')))
1155 yylval.opcode = tokentab3[i].opcode;
1156 return tokentab3[i].token;
1159 /* See if it is a special token of length 2. */
1161 for (i = 0; i < sizeof (tokentab2) / sizeof (tokentab2[0]); i++)
1162 if (strncasecmp (tokstart, tokentab2[i].operator, 2) == 0
1163 && (!isalpha (tokentab2[i].operator[0]) || explen == 2
1164 || (!isalpha (tokstart[2])
1165 && !isdigit (tokstart[2]) && tokstart[2] != '_')))
1168 yylval.opcode = tokentab2[i].opcode;
1169 return tokentab2[i].token;
1172 switch (c = *tokstart)
1175 if (saw_structop && search_field)
1187 /* We either have a character constant ('0' or '\177' for example)
1188 or we have a quoted symbol reference ('foo(int,int)' in object pascal
1193 c = parse_escape (parse_gdbarch, &lexptr);
1195 error (_("Empty character constant."));
1197 yylval.typed_val_int.val = c;
1198 yylval.typed_val_int.type = parse_type->builtin_char;
1203 namelen = skip_quoted (tokstart) - tokstart;
1206 lexptr = tokstart + namelen;
1207 if (lexptr[-1] != '\'')
1208 error (_("Unmatched single quote."));
1211 uptokstart = uptok(tokstart,namelen);
1214 error (_("Invalid character constant."));
1224 if (paren_depth == 0)
1231 if (comma_terminates && paren_depth == 0)
1237 /* Might be a floating point number. */
1238 if (lexptr[1] < '0' || lexptr[1] > '9')
1240 if (parse_completion)
1241 last_was_structop = 1;
1242 goto symbol; /* Nope, must be a symbol. */
1245 /* FALL THRU into number case. */
1258 /* It's a number. */
1259 int got_dot = 0, got_e = 0, toktype;
1261 int hex = input_radix > 10;
1263 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
1268 else if (c == '0' && (p[1]=='t' || p[1]=='T'
1269 || p[1]=='d' || p[1]=='D'))
1277 /* This test includes !hex because 'e' is a valid hex digit
1278 and thus does not indicate a floating point number when
1279 the radix is hex. */
1280 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
1281 got_dot = got_e = 1;
1282 /* This test does not include !hex, because a '.' always indicates
1283 a decimal floating point number regardless of the radix. */
1284 else if (!got_dot && *p == '.')
1286 else if (got_e && (p[-1] == 'e' || p[-1] == 'E')
1287 && (*p == '-' || *p == '+'))
1288 /* This is the sign of the exponent, not the end of the
1291 /* We will take any letters or digits. parse_number will
1292 complain if past the radix, or if L or U are not final. */
1293 else if ((*p < '0' || *p > '9')
1294 && ((*p < 'a' || *p > 'z')
1295 && (*p < 'A' || *p > 'Z')))
1298 toktype = parse_number (tokstart,
1299 p - tokstart, got_dot | got_e, &yylval);
1300 if (toktype == ERROR)
1302 char *err_copy = (char *) alloca (p - tokstart + 1);
1304 memcpy (err_copy, tokstart, p - tokstart);
1305 err_copy[p - tokstart] = 0;
1306 error (_("Invalid number \"%s\"."), err_copy);
1337 /* Build the gdb internal form of the input string in tempbuf,
1338 translating any standard C escape forms seen. Note that the
1339 buffer is null byte terminated *only* for the convenience of
1340 debugging gdb itself and printing the buffer contents when
1341 the buffer contains no embedded nulls. Gdb does not depend
1342 upon the buffer being null byte terminated, it uses the length
1343 string instead. This allows gdb to handle C strings (as well
1344 as strings in other languages) with embedded null bytes. */
1346 tokptr = ++tokstart;
1350 /* Grow the static temp buffer if necessary, including allocating
1351 the first one on demand. */
1352 if (tempbufindex + 1 >= tempbufsize)
1354 tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
1361 /* Do nothing, loop will terminate. */
1365 c = parse_escape (parse_gdbarch, &tokptr);
1370 tempbuf[tempbufindex++] = c;
1373 tempbuf[tempbufindex++] = *tokptr++;
1376 } while ((*tokptr != '"') && (*tokptr != '\0'));
1377 if (*tokptr++ != '"')
1379 error (_("Unterminated string in expression."));
1381 tempbuf[tempbufindex] = '\0'; /* See note above. */
1382 yylval.sval.ptr = tempbuf;
1383 yylval.sval.length = tempbufindex;
1388 if (!(c == '_' || c == '$'
1389 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
1390 /* We must have come across a bad character (e.g. ';'). */
1391 error (_("Invalid character '%c' in expression."), c);
1393 /* It's a name. See how long it is. */
1395 for (c = tokstart[namelen];
1396 (c == '_' || c == '$' || (c >= '0' && c <= '9')
1397 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
1399 /* Template parameter lists are part of the name.
1400 FIXME: This mishandles `print $a<4&&$a>3'. */
1404 int nesting_level = 1;
1405 while (tokstart[++i])
1407 if (tokstart[i] == '<')
1409 else if (tokstart[i] == '>')
1411 if (--nesting_level == 0)
1415 if (tokstart[i] == '>')
1421 /* do NOT uppercase internals because of registers !!! */
1422 c = tokstart[++namelen];
1425 uptokstart = uptok(tokstart,namelen);
1427 /* The token "if" terminates the expression and is NOT
1428 removed from the input stream. */
1429 if (namelen == 2 && uptokstart[0] == 'I' && uptokstart[1] == 'F')
1439 /* Catch specific keywords. Should be done with a data structure. */
1443 if (strcmp (uptokstart, "OBJECT") == 0)
1448 if (strcmp (uptokstart, "RECORD") == 0)
1453 if (strcmp (uptokstart, "SIZEOF") == 0)
1460 if (strcmp (uptokstart, "CLASS") == 0)
1465 if (strcmp (uptokstart, "FALSE") == 0)
1469 return FALSEKEYWORD;
1473 if (strcmp (uptokstart, "TRUE") == 0)
1479 if (strcmp (uptokstart, "SELF") == 0)
1481 /* Here we search for 'this' like
1482 inserted in FPC stabs debug info. */
1483 static const char this_name[] = "this";
1485 if (lookup_symbol (this_name, expression_context_block,
1497 yylval.sval.ptr = tokstart;
1498 yylval.sval.length = namelen;
1500 if (*tokstart == '$')
1503 /* $ is the normal prefix for pascal hexadecimal values
1504 but this conflicts with the GDB use for debugger variables
1505 so in expression to enter hexadecimal values
1506 we still need to use C syntax with 0xff */
1507 write_dollar_variable (yylval.sval);
1508 c = tokstart[namelen];
1509 tokstart[namelen] = 0;
1510 intvar = lookup_only_internalvar (++tokstart);
1512 tokstart[namelen] = c;
1517 /* Use token-type BLOCKNAME for symbols that happen to be defined as
1518 functions or symtabs. If this is not so, then ...
1519 Use token-type TYPENAME for symbols that happen to be defined
1520 currently as names of types; NAME for other symbols.
1521 The caller is not constrained to care about the distinction. */
1523 char *tmp = copy_name (yylval.sval);
1525 struct field_of_this_result is_a_field_of_this;
1530 if (search_field && current_type)
1531 is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL);
1532 if (is_a_field || parse_completion)
1535 sym = lookup_symbol (tmp, expression_context_block,
1536 VAR_DOMAIN, &is_a_field_of_this);
1537 /* second chance uppercased (as Free Pascal does). */
1538 if (!sym && is_a_field_of_this.type == NULL && !is_a_field)
1540 for (i = 0; i <= namelen; i++)
1542 if ((tmp[i] >= 'a' && tmp[i] <= 'z'))
1543 tmp[i] -= ('a'-'A');
1545 if (search_field && current_type)
1546 is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL);
1547 if (is_a_field || parse_completion)
1550 sym = lookup_symbol (tmp, expression_context_block,
1551 VAR_DOMAIN, &is_a_field_of_this);
1552 if (sym || is_a_field_of_this.type != NULL || is_a_field)
1553 for (i = 0; i <= namelen; i++)
1555 if ((tokstart[i] >= 'a' && tokstart[i] <= 'z'))
1556 tokstart[i] -= ('a'-'A');
1559 /* Third chance Capitalized (as GPC does). */
1560 if (!sym && is_a_field_of_this.type == NULL && !is_a_field)
1562 for (i = 0; i <= namelen; i++)
1566 if ((tmp[i] >= 'a' && tmp[i] <= 'z'))
1567 tmp[i] -= ('a'-'A');
1570 if ((tmp[i] >= 'A' && tmp[i] <= 'Z'))
1571 tmp[i] -= ('A'-'a');
1573 if (search_field && current_type)
1574 is_a_field = (lookup_struct_elt_type (current_type, tmp, 1) != NULL);
1575 if (is_a_field || parse_completion)
1578 sym = lookup_symbol (tmp, expression_context_block,
1579 VAR_DOMAIN, &is_a_field_of_this);
1580 if (sym || is_a_field_of_this.type != NULL || is_a_field)
1581 for (i = 0; i <= namelen; i++)
1585 if ((tokstart[i] >= 'a' && tokstart[i] <= 'z'))
1586 tokstart[i] -= ('a'-'A');
1589 if ((tokstart[i] >= 'A' && tokstart[i] <= 'Z'))
1590 tokstart[i] -= ('A'-'a');
1596 tempbuf = (char *) realloc (tempbuf, namelen + 1);
1597 strncpy (tempbuf, tokstart, namelen); tempbuf [namelen] = 0;
1598 yylval.sval.ptr = tempbuf;
1599 yylval.sval.length = namelen;
1603 /* Call lookup_symtab, not lookup_partial_symtab, in case there are
1604 no psymtabs (coff, xcoff, or some future change to blow away the
1605 psymtabs once once symbols are read). */
1606 if ((sym && SYMBOL_CLASS (sym) == LOC_BLOCK)
1607 || lookup_symtab (tmp))
1609 yylval.ssym.sym = sym;
1610 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
1614 if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1617 /* Despite the following flaw, we need to keep this code enabled.
1618 Because we can get called from check_stub_method, if we don't
1619 handle nested types then it screws many operations in any
1620 program which uses nested types. */
1621 /* In "A::x", if x is a member function of A and there happens
1622 to be a type (nested or not, since the stabs don't make that
1623 distinction) named x, then this code incorrectly thinks we
1624 are dealing with nested types rather than a member function. */
1628 struct symbol *best_sym;
1630 /* Look ahead to detect nested types. This probably should be
1631 done in the grammar, but trying seemed to introduce a lot
1632 of shift/reduce and reduce/reduce conflicts. It's possible
1633 that it could be done, though. Or perhaps a non-grammar, but
1634 less ad hoc, approach would work well. */
1636 /* Since we do not currently have any way of distinguishing
1637 a nested type from a non-nested one (the stabs don't tell
1638 us whether a type is nested), we just ignore the
1645 /* Skip whitespace. */
1646 while (*p == ' ' || *p == '\t' || *p == '\n')
1648 if (*p == ':' && p[1] == ':')
1650 /* Skip the `::'. */
1652 /* Skip whitespace. */
1653 while (*p == ' ' || *p == '\t' || *p == '\n')
1656 while (*p == '_' || *p == '$' || (*p >= '0' && *p <= '9')
1657 || (*p >= 'a' && *p <= 'z')
1658 || (*p >= 'A' && *p <= 'Z'))
1662 struct symbol *cur_sym;
1663 /* As big as the whole rest of the expression, which is
1664 at least big enough. */
1665 char *ncopy = alloca (strlen (tmp)+strlen (namestart)+3);
1669 memcpy (tmp1, tmp, strlen (tmp));
1670 tmp1 += strlen (tmp);
1671 memcpy (tmp1, "::", 2);
1673 memcpy (tmp1, namestart, p - namestart);
1674 tmp1[p - namestart] = '\0';
1675 cur_sym = lookup_symbol (ncopy, expression_context_block,
1679 if (SYMBOL_CLASS (cur_sym) == LOC_TYPEDEF)
1697 yylval.tsym.type = SYMBOL_TYPE (best_sym);
1699 yylval.tsym.type = SYMBOL_TYPE (sym);
1705 = language_lookup_primitive_type_by_name (parse_language,
1706 parse_gdbarch, tmp);
1707 if (yylval.tsym.type != NULL)
1713 /* Input names that aren't symbols but ARE valid hex numbers,
1714 when the input radix permits them, can be names or numbers
1715 depending on the parse. Note we support radixes > 16 here. */
1717 && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
1718 || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
1720 YYSTYPE newlval; /* Its value is ignored. */
1721 hextype = parse_number (tokstart, namelen, 0, &newlval);
1724 yylval.ssym.sym = sym;
1725 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
1732 /* Any other kind of symbol. */
1733 yylval.ssym.sym = sym;
1734 yylval.ssym.is_a_field_of_this = is_a_field_of_this.type != NULL;
1743 lexptr = prev_lexptr;
1745 error (_("A %s in expression, near `%s'."), (msg ? msg : "error"), lexptr);