1 /* YACC parser for Fortran expressions, for GDB.
2 Copyright (C) 1986, 1989-1991, 1993-1996, 2000-2012 Free Software
5 Contributed by Motorola. Adapted from the C parser by Farooq Butt
6 (fmbutt@engage.sps.mot.com).
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
23 /* This was blantantly ripped off the C expression parser, please
24 be aware of that as you look at its basic structure -FMB */
26 /* Parse a F77 expression from text in a string,
27 and return the result as a struct expression pointer.
28 That structure contains arithmetic operations in reverse polish,
29 with constants represented by operations that are followed by special data.
30 See expression.h for the details of the format.
31 What is important here is that it can be built up sequentially
32 during the process of parsing; the lower levels of the tree always
33 come first in the result.
35 Note that malloc's and realloc's in this file are transformed to
36 xmalloc and xrealloc respectively by the same sed command in the
37 makefile that remaps any other malloc/realloc inserted by the parser
38 generator. Doing this with #defines and trying to control the interaction
39 with include files (<malloc.h> and <stdlib.h> for example) just became
40 too messy, particularly when such includes can be inserted at random
41 times by the parser generator. */
46 #include "gdb_string.h"
47 #include "expression.h"
49 #include "parser-defs.h"
52 #include "bfd.h" /* Required by objfiles.h. */
53 #include "symfile.h" /* Required by objfiles.h. */
54 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
58 #define parse_type builtin_type (parse_gdbarch)
59 #define parse_f_type builtin_f_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 f_maxdepth
69 #define yyparse f_parse
71 #define yyerror f_error
74 #define yydebug f_debug
83 #define yyerrflag f_errflag
84 #define yynerrs f_nerrs
89 #define yystate f_state
95 #define yyreds f_reds /* With YYDEBUG defined */
96 #define yytoks f_toks /* With YYDEBUG defined */
97 #define yyname f_name /* With YYDEBUG defined */
98 #define yyrule f_rule /* With YYDEBUG defined */
100 #define yylen f_yylen
101 #define yydefred f_yydefred
102 #define yydgoto f_yydgoto
103 #define yysindex f_yysindex
104 #define yyrindex f_yyrindex
105 #define yygindex f_yygindex
106 #define yytable f_yytable
107 #define yycheck f_yycheck
109 #define yysslim f_yysslim
110 #define yyssp f_yyssp
111 #define yystacksize f_yystacksize
113 #define yyvsp f_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 void growbuf_by_size (int);
129 static int match_string_literal (void);
133 /* Although the yacc "value" of an expression is not used,
134 since the result is stored in the structure being created,
135 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 *);
164 %type <voidval> exp type_exp start variable
165 %type <tval> type typebase
166 %type <tvec> nonempty_typelist
167 /* %type <bval> block */
169 /* Fancy type parsing. */
170 %type <voidval> func_mod direct_abs_decl abs_decl
173 %token <typed_val> INT
176 /* Both NAME and TYPENAME tokens represent symbols in the input,
177 and both convey their data as strings.
178 But a TYPENAME is a string that happens to be defined as a typedef
179 or builtin type name (such as int or char)
180 and a NAME is any other symbol.
181 Contexts where this distinction is not important can use the
182 nonterminal "name", which matches either NAME or TYPENAME. */
184 %token <sval> STRING_LITERAL
185 %token <lval> BOOLEAN_LITERAL
187 %token <tsym> TYPENAME
189 %type <ssym> name_not_typename
191 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
192 but which would parse as a valid number in the current input radix.
193 E.g. "c" when input_radix==16. Depending on the parse, it will be
194 turned into a name or into a number. */
196 %token <ssym> NAME_OR_INT
201 /* Special type cases, put in to allow the parser to distinguish different
203 %token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD
204 %token LOGICAL_S8_KEYWORD
205 %token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD
206 %token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD
207 %token BOOL_AND BOOL_OR BOOL_NOT
208 %token <lval> CHARACTER
210 %token <voidval> VARIABLE
212 %token <opcode> ASSIGN_MODIFY
216 %right '=' ASSIGN_MODIFY
225 %left LESSTHAN GREATERTHAN LEQ GEQ
243 { write_exp_elt_opcode(OP_TYPE);
244 write_exp_elt_type($1);
245 write_exp_elt_opcode(OP_TYPE); }
252 /* Expressions, not including the comma operator. */
253 exp : '*' exp %prec UNARY
254 { write_exp_elt_opcode (UNOP_IND); }
257 exp : '&' exp %prec UNARY
258 { write_exp_elt_opcode (UNOP_ADDR); }
261 exp : '-' exp %prec UNARY
262 { write_exp_elt_opcode (UNOP_NEG); }
265 exp : BOOL_NOT exp %prec UNARY
266 { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
269 exp : '~' exp %prec UNARY
270 { write_exp_elt_opcode (UNOP_COMPLEMENT); }
273 exp : SIZEOF exp %prec UNARY
274 { write_exp_elt_opcode (UNOP_SIZEOF); }
277 /* No more explicit array operators, we treat everything in F77 as
278 a function call. The disambiguation as to whether we are
279 doing a subscript operation or a function call is done
283 { start_arglist (); }
285 { write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST);
286 write_exp_elt_longcst ((LONGEST) end_arglist ());
287 write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST); }
301 arglist : arglist ',' exp %prec ABOVE_COMMA
305 /* There are four sorts of subrange types in F90. */
307 subrange: exp ':' exp %prec ABOVE_COMMA
308 { write_exp_elt_opcode (OP_F90_RANGE);
309 write_exp_elt_longcst (NONE_BOUND_DEFAULT);
310 write_exp_elt_opcode (OP_F90_RANGE); }
313 subrange: exp ':' %prec ABOVE_COMMA
314 { write_exp_elt_opcode (OP_F90_RANGE);
315 write_exp_elt_longcst (HIGH_BOUND_DEFAULT);
316 write_exp_elt_opcode (OP_F90_RANGE); }
319 subrange: ':' exp %prec ABOVE_COMMA
320 { write_exp_elt_opcode (OP_F90_RANGE);
321 write_exp_elt_longcst (LOW_BOUND_DEFAULT);
322 write_exp_elt_opcode (OP_F90_RANGE); }
325 subrange: ':' %prec ABOVE_COMMA
326 { write_exp_elt_opcode (OP_F90_RANGE);
327 write_exp_elt_longcst (BOTH_BOUND_DEFAULT);
328 write_exp_elt_opcode (OP_F90_RANGE); }
331 complexnum: exp ',' exp
335 exp : '(' complexnum ')'
336 { write_exp_elt_opcode(OP_COMPLEX);
337 write_exp_elt_type (parse_f_type->builtin_complex_s16);
338 write_exp_elt_opcode(OP_COMPLEX); }
341 exp : '(' type ')' exp %prec UNARY
342 { write_exp_elt_opcode (UNOP_CAST);
343 write_exp_elt_type ($2);
344 write_exp_elt_opcode (UNOP_CAST); }
348 { write_exp_elt_opcode (STRUCTOP_STRUCT);
349 write_exp_string ($3);
350 write_exp_elt_opcode (STRUCTOP_STRUCT); }
353 /* Binary operators in order of decreasing precedence. */
356 { write_exp_elt_opcode (BINOP_REPEAT); }
359 exp : exp STARSTAR exp
360 { write_exp_elt_opcode (BINOP_EXP); }
364 { write_exp_elt_opcode (BINOP_MUL); }
368 { write_exp_elt_opcode (BINOP_DIV); }
372 { write_exp_elt_opcode (BINOP_ADD); }
376 { write_exp_elt_opcode (BINOP_SUB); }
380 { write_exp_elt_opcode (BINOP_LSH); }
384 { write_exp_elt_opcode (BINOP_RSH); }
388 { write_exp_elt_opcode (BINOP_EQUAL); }
391 exp : exp NOTEQUAL exp
392 { write_exp_elt_opcode (BINOP_NOTEQUAL); }
396 { write_exp_elt_opcode (BINOP_LEQ); }
400 { write_exp_elt_opcode (BINOP_GEQ); }
403 exp : exp LESSTHAN exp
404 { write_exp_elt_opcode (BINOP_LESS); }
407 exp : exp GREATERTHAN exp
408 { write_exp_elt_opcode (BINOP_GTR); }
412 { write_exp_elt_opcode (BINOP_BITWISE_AND); }
416 { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
420 { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
423 exp : exp BOOL_AND exp
424 { write_exp_elt_opcode (BINOP_LOGICAL_AND); }
428 exp : exp BOOL_OR exp
429 { write_exp_elt_opcode (BINOP_LOGICAL_OR); }
433 { write_exp_elt_opcode (BINOP_ASSIGN); }
436 exp : exp ASSIGN_MODIFY exp
437 { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
438 write_exp_elt_opcode ($2);
439 write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
443 { write_exp_elt_opcode (OP_LONG);
444 write_exp_elt_type ($1.type);
445 write_exp_elt_longcst ((LONGEST)($1.val));
446 write_exp_elt_opcode (OP_LONG); }
451 parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
452 write_exp_elt_opcode (OP_LONG);
453 write_exp_elt_type (val.typed_val.type);
454 write_exp_elt_longcst ((LONGEST)val.typed_val.val);
455 write_exp_elt_opcode (OP_LONG); }
459 { write_exp_elt_opcode (OP_DOUBLE);
460 write_exp_elt_type (parse_f_type->builtin_real_s8);
461 write_exp_elt_dblcst ($1);
462 write_exp_elt_opcode (OP_DOUBLE); }
471 exp : SIZEOF '(' type ')' %prec UNARY
472 { write_exp_elt_opcode (OP_LONG);
473 write_exp_elt_type (parse_f_type->builtin_integer);
475 write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
476 write_exp_elt_opcode (OP_LONG); }
479 exp : BOOLEAN_LITERAL
480 { write_exp_elt_opcode (OP_BOOL);
481 write_exp_elt_longcst ((LONGEST) $1);
482 write_exp_elt_opcode (OP_BOOL);
488 write_exp_elt_opcode (OP_STRING);
489 write_exp_string ($1);
490 write_exp_elt_opcode (OP_STRING);
494 variable: name_not_typename
495 { struct symbol *sym = $1.sym;
499 if (symbol_read_needs_frame (sym))
501 if (innermost_block == 0
502 || contained_in (block_found,
504 innermost_block = block_found;
506 write_exp_elt_opcode (OP_VAR_VALUE);
507 /* We want to use the selected frame, not
508 another more inner frame which happens to
509 be in the same block. */
510 write_exp_elt_block (NULL);
511 write_exp_elt_sym (sym);
512 write_exp_elt_opcode (OP_VAR_VALUE);
517 struct minimal_symbol *msymbol;
518 char *arg = copy_name ($1.stoken);
521 lookup_minimal_symbol (arg, NULL, NULL);
523 write_exp_msymbol (msymbol);
524 else if (!have_full_symbols () && !have_partial_symbols ())
525 error (_("No symbol table is loaded. Use the \"file\" command."));
527 error (_("No symbol \"%s\" in current context."),
528 copy_name ($1.stoken));
540 /* This is where the interesting stuff happens. */
543 struct type *follow_type = $1;
544 struct type *range_type;
553 follow_type = lookup_pointer_type (follow_type);
556 follow_type = lookup_reference_type (follow_type);
559 array_size = pop_type_int ();
560 if (array_size != -1)
563 create_range_type ((struct type *) NULL,
564 parse_f_type->builtin_integer,
567 create_array_type ((struct type *) NULL,
568 follow_type, range_type);
571 follow_type = lookup_pointer_type (follow_type);
574 follow_type = lookup_function_type (follow_type);
582 { push_type (tp_pointer); $$ = 0; }
584 { push_type (tp_pointer); $$ = $2; }
586 { push_type (tp_reference); $$ = 0; }
588 { push_type (tp_reference); $$ = $2; }
592 direct_abs_decl: '(' abs_decl ')'
594 | direct_abs_decl func_mod
595 { push_type (tp_function); }
597 { push_type (tp_function); }
602 | '(' nonempty_typelist ')'
603 { free ($2); $$ = 0; }
606 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
610 { $$ = parse_f_type->builtin_integer; }
612 { $$ = parse_f_type->builtin_integer_s2; }
614 { $$ = parse_f_type->builtin_character; }
616 { $$ = parse_f_type->builtin_logical_s8; }
618 { $$ = parse_f_type->builtin_logical; }
620 { $$ = parse_f_type->builtin_logical_s2; }
622 { $$ = parse_f_type->builtin_logical_s1; }
624 { $$ = parse_f_type->builtin_real; }
626 { $$ = parse_f_type->builtin_real_s8; }
628 { $$ = parse_f_type->builtin_real_s16; }
630 { $$ = parse_f_type->builtin_complex_s8; }
631 | COMPLEX_S16_KEYWORD
632 { $$ = parse_f_type->builtin_complex_s16; }
633 | COMPLEX_S32_KEYWORD
634 { $$ = parse_f_type->builtin_complex_s32; }
639 { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
640 $<ivec>$[0] = 1; /* Number of types in vector */
643 | nonempty_typelist ',' type
644 { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
645 $$ = (struct type **) realloc ((char *) $1, len);
646 $$[$<ivec>$[0]] = $3;
654 name_not_typename : NAME
655 /* These would be useful if name_not_typename was useful, but it is just
656 a fake for "variable", so these cause reduce/reduce conflicts because
657 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
658 =exp) or just an exp. If name_not_typename was ever used in an lvalue
659 context where only a name could occur, this might be useful.
666 /* Take care of parsing a number (anything that starts with a digit).
667 Set yylval and return the token type; update lexptr.
668 LEN is the number of characters in it. */
670 /*** Needs some error checking for the float case ***/
673 parse_number (char *p, int len, int parsed_float, YYSTYPE *putithere)
678 int base = input_radix;
682 struct type *signed_type;
683 struct type *unsigned_type;
687 /* It's a float since it contains a point or an exponent. */
688 /* [dD] is not understood as an exponent by atof, change it to 'e'. */
692 for (tmp2 = tmp; *tmp2; ++tmp2)
693 if (*tmp2 == 'd' || *tmp2 == 'D')
695 putithere->dval = atof (tmp);
700 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
736 if (len == 0 && c == 'l')
738 else if (len == 0 && c == 'u')
743 if (c >= '0' && c <= '9')
745 else if (c >= 'a' && c <= 'f')
748 return ERROR; /* Char not a digit */
750 return ERROR; /* Invalid digit in this base */
754 /* Portably test for overflow (only works for nonzero values, so make
755 a second check for zero). */
756 if ((prevn >= n) && n != 0)
757 unsigned_p=1; /* Try something unsigned */
758 /* If range checking enabled, portably test for unsigned overflow. */
759 if (RANGE_CHECK && n != 0)
761 if ((unsigned_p && (unsigned)prevn >= (unsigned)n))
762 range_error (_("Overflow on numeric constant."));
767 /* If the number is too big to be an int, or it's got an l suffix
768 then it's a long. Work out if this has to be a long by
769 shifting right and seeing if anything remains, and the
770 target int size is different to the target long size.
772 In the expression below, we could have tested
773 (n >> gdbarch_int_bit (parse_gdbarch))
774 to see if it was zero,
775 but too many compilers warn about that, when ints and longs
776 are the same size. So we shift it twice, with fewer bits
777 each time, for the same result. */
779 if ((gdbarch_int_bit (parse_gdbarch) != gdbarch_long_bit (parse_gdbarch)
781 >> (gdbarch_int_bit (parse_gdbarch)-2))) /* Avoid shift warning */
784 high_bit = ((ULONGEST)1) << (gdbarch_long_bit (parse_gdbarch)-1);
785 unsigned_type = parse_type->builtin_unsigned_long;
786 signed_type = parse_type->builtin_long;
790 high_bit = ((ULONGEST)1) << (gdbarch_int_bit (parse_gdbarch)-1);
791 unsigned_type = parse_type->builtin_unsigned_int;
792 signed_type = parse_type->builtin_int;
795 putithere->typed_val.val = n;
797 /* If the high bit of the worked out type is set then this number
798 has to be unsigned. */
800 if (unsigned_p || (n & high_bit))
801 putithere->typed_val.type = unsigned_type;
803 putithere->typed_val.type = signed_type;
812 enum exp_opcode opcode;
815 static const struct token dot_ops[] =
817 { ".and.", BOOL_AND, BINOP_END },
818 { ".AND.", BOOL_AND, BINOP_END },
819 { ".or.", BOOL_OR, BINOP_END },
820 { ".OR.", BOOL_OR, BINOP_END },
821 { ".not.", BOOL_NOT, BINOP_END },
822 { ".NOT.", BOOL_NOT, BINOP_END },
823 { ".eq.", EQUAL, BINOP_END },
824 { ".EQ.", EQUAL, BINOP_END },
825 { ".eqv.", EQUAL, BINOP_END },
826 { ".NEQV.", NOTEQUAL, BINOP_END },
827 { ".neqv.", NOTEQUAL, BINOP_END },
828 { ".EQV.", EQUAL, BINOP_END },
829 { ".ne.", NOTEQUAL, BINOP_END },
830 { ".NE.", NOTEQUAL, BINOP_END },
831 { ".le.", LEQ, BINOP_END },
832 { ".LE.", LEQ, BINOP_END },
833 { ".ge.", GEQ, BINOP_END },
834 { ".GE.", GEQ, BINOP_END },
835 { ".gt.", GREATERTHAN, BINOP_END },
836 { ".GT.", GREATERTHAN, BINOP_END },
837 { ".lt.", LESSTHAN, BINOP_END },
838 { ".LT.", LESSTHAN, BINOP_END },
842 struct f77_boolean_val
848 static const struct f77_boolean_val boolean_values[] =
857 static const struct token f77_keywords[] =
859 { "complex_16", COMPLEX_S16_KEYWORD, BINOP_END },
860 { "complex_32", COMPLEX_S32_KEYWORD, BINOP_END },
861 { "character", CHARACTER, BINOP_END },
862 { "integer_2", INT_S2_KEYWORD, BINOP_END },
863 { "logical_1", LOGICAL_S1_KEYWORD, BINOP_END },
864 { "logical_2", LOGICAL_S2_KEYWORD, BINOP_END },
865 { "logical_8", LOGICAL_S8_KEYWORD, BINOP_END },
866 { "complex_8", COMPLEX_S8_KEYWORD, BINOP_END },
867 { "integer", INT_KEYWORD, BINOP_END },
868 { "logical", LOGICAL_KEYWORD, BINOP_END },
869 { "real_16", REAL_S16_KEYWORD, BINOP_END },
870 { "complex", COMPLEX_S8_KEYWORD, BINOP_END },
871 { "sizeof", SIZEOF, BINOP_END },
872 { "real_8", REAL_S8_KEYWORD, BINOP_END },
873 { "real", REAL_KEYWORD, BINOP_END },
877 /* Implementation of a dynamically expandable buffer for processing input
878 characters acquired through lexptr and building a value to return in
879 yylval. Ripped off from ch-exp.y */
881 static char *tempbuf; /* Current buffer contents */
882 static int tempbufsize; /* Size of allocated buffer */
883 static int tempbufindex; /* Current index into buffer */
885 #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */
887 #define CHECKBUF(size) \
889 if (tempbufindex + (size) >= tempbufsize) \
891 growbuf_by_size (size); \
896 /* Grow the static temp buffer if necessary, including allocating the
897 first one on demand. */
900 growbuf_by_size (int count)
904 growby = max (count, GROWBY_MIN_SIZE);
905 tempbufsize += growby;
907 tempbuf = (char *) malloc (tempbufsize);
909 tempbuf = (char *) realloc (tempbuf, tempbufsize);
912 /* Blatantly ripped off from ch-exp.y. This routine recognizes F77
915 Recognize a string literal. A string literal is a nonzero sequence
916 of characters enclosed in matching single quotes, except that
917 a single character inside single quotes is a character literal, which
918 we reject as a string literal. To embed the terminator character inside
919 a string, it is simply doubled (I.E. 'this''is''one''string') */
922 match_string_literal (void)
924 char *tokptr = lexptr;
926 for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++)
929 if (*tokptr == *lexptr)
931 if (*(tokptr + 1) == *lexptr)
936 tempbuf[tempbufindex++] = *tokptr;
938 if (*tokptr == '\0' /* no terminator */
939 || tempbufindex == 0) /* no string */
943 tempbuf[tempbufindex] = '\0';
944 yylval.sval.ptr = tempbuf;
945 yylval.sval.length = tempbufindex;
947 return STRING_LITERAL;
951 /* Read one token, getting characters through lexptr. */
958 unsigned int i,token;
963 prev_lexptr = lexptr;
967 /* First of all, let us make sure we are not dealing with the
968 special tokens .true. and .false. which evaluate to 1 and 0. */
972 for (i = 0; boolean_values[i].name != NULL; i++)
974 if (strncmp (tokstart, boolean_values[i].name,
975 strlen (boolean_values[i].name)) == 0)
977 lexptr += strlen (boolean_values[i].name);
978 yylval.lval = boolean_values[i].value;
979 return BOOLEAN_LITERAL;
984 /* See if it is a special .foo. operator. */
986 for (i = 0; dot_ops[i].operator != NULL; i++)
987 if (strncmp (tokstart, dot_ops[i].operator,
988 strlen (dot_ops[i].operator)) == 0)
990 lexptr += strlen (dot_ops[i].operator);
991 yylval.opcode = dot_ops[i].opcode;
992 return dot_ops[i].token;
995 /* See if it is an exponentiation operator. */
997 if (strncmp (tokstart, "**", 2) == 0)
1000 yylval.opcode = BINOP_EXP;
1004 switch (c = *tokstart)
1016 token = match_string_literal ();
1027 if (paren_depth == 0)
1034 if (comma_terminates && paren_depth == 0)
1040 /* Might be a floating point number. */
1041 if (lexptr[1] < '0' || lexptr[1] > '9')
1042 goto symbol; /* Nope, must be a symbol. */
1043 /* FALL THRU into number case. */
1056 /* It's a number. */
1057 int got_dot = 0, got_e = 0, got_d = 0, toktype;
1059 int hex = input_radix > 10;
1061 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
1066 else if (c == '0' && (p[1]=='t' || p[1]=='T'
1067 || p[1]=='d' || p[1]=='D'))
1075 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
1076 got_dot = got_e = 1;
1077 else if (!hex && !got_d && (*p == 'd' || *p == 'D'))
1078 got_dot = got_d = 1;
1079 else if (!hex && !got_dot && *p == '.')
1081 else if (((got_e && (p[-1] == 'e' || p[-1] == 'E'))
1082 || (got_d && (p[-1] == 'd' || p[-1] == 'D')))
1083 && (*p == '-' || *p == '+'))
1084 /* This is the sign of the exponent, not the end of the
1087 /* We will take any letters or digits. parse_number will
1088 complain if past the radix, or if L or U are not final. */
1089 else if ((*p < '0' || *p > '9')
1090 && ((*p < 'a' || *p > 'z')
1091 && (*p < 'A' || *p > 'Z')))
1094 toktype = parse_number (tokstart, p - tokstart, got_dot|got_e|got_d,
1096 if (toktype == ERROR)
1098 char *err_copy = (char *) alloca (p - tokstart + 1);
1100 memcpy (err_copy, tokstart, p - tokstart);
1101 err_copy[p - tokstart] = 0;
1102 error (_("Invalid number \"%s\"."), err_copy);
1133 if (!(c == '_' || c == '$' || c ==':'
1134 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
1135 /* We must have come across a bad character (e.g. ';'). */
1136 error (_("Invalid character '%c' in expression."), c);
1139 for (c = tokstart[namelen];
1140 (c == '_' || c == '$' || c == ':' || (c >= '0' && c <= '9')
1141 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
1142 c = tokstart[++namelen]);
1144 /* The token "if" terminates the expression and is NOT
1145 removed from the input stream. */
1147 if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
1152 /* Catch specific keywords. */
1154 for (i = 0; f77_keywords[i].operator != NULL; i++)
1155 if (strlen (f77_keywords[i].operator) == namelen
1156 && strncmp (tokstart, f77_keywords[i].operator, namelen) == 0)
1158 /* lexptr += strlen(f77_keywords[i].operator); */
1159 yylval.opcode = f77_keywords[i].opcode;
1160 return f77_keywords[i].token;
1163 yylval.sval.ptr = tokstart;
1164 yylval.sval.length = namelen;
1166 if (*tokstart == '$')
1168 write_dollar_variable (yylval.sval);
1172 /* Use token-type TYPENAME for symbols that happen to be defined
1173 currently as names of types; NAME for other symbols.
1174 The caller is not constrained to care about the distinction. */
1176 char *tmp = copy_name (yylval.sval);
1178 int is_a_field_of_this = 0;
1181 sym = lookup_symbol (tmp, expression_context_block,
1183 parse_language->la_language == language_cplus
1184 ? &is_a_field_of_this : NULL);
1185 if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1187 yylval.tsym.type = SYMBOL_TYPE (sym);
1191 = language_lookup_primitive_type_by_name (parse_language,
1192 parse_gdbarch, tmp);
1193 if (yylval.tsym.type != NULL)
1196 /* Input names that aren't symbols but ARE valid hex numbers,
1197 when the input radix permits them, can be names or numbers
1198 depending on the parse. Note we support radixes > 16 here. */
1200 && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
1201 || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
1203 YYSTYPE newlval; /* Its value is ignored. */
1204 hextype = parse_number (tokstart, namelen, 0, &newlval);
1207 yylval.ssym.sym = sym;
1208 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1213 /* Any other kind of symbol */
1214 yylval.ssym.sym = sym;
1215 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1224 lexptr = prev_lexptr;
1226 error (_("A %s in expression, near `%s'."), (msg ? msg : "error"), lexptr);