1 /* YACC parser for Fortran expressions, for GDB.
2 Copyright 1986, 1989, 1990, 1991, 1993, 1994
3 Free Software Foundation, Inc.
4 Contributed by Motorola. Adapted from the C parser by Farooq Butt
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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. */
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 */
56 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
57 as well as gratuitiously global symbol names, so we can have multiple
58 yacc generated parsers in gdb. Note that these are only the variables
59 produced by yacc. If other parser generators (bison, byacc, etc) produce
60 additional global names that conflict at link time, then those parser
61 generators need to be fixed instead of adding those names to this list. */
63 #define yymaxdepth f_maxdepth
64 #define yyparse f_parse
66 #define yyerror f_error
69 #define yydebug f_debug
78 #define yyerrflag f_errflag
79 #define yynerrs f_nerrs
84 #define yystate f_state
90 #define yyreds f_reds /* With YYDEBUG defined */
91 #define yytoks f_toks /* With YYDEBUG defined */
94 #define YYDEBUG 1 /* Default to no yydebug support */
97 int yyparse PARAMS ((void));
99 static int yylex PARAMS ((void));
101 void yyerror PARAMS ((char *));
105 /* Although the yacc "value" of an expression is not used,
106 since the result is stored in the structure being created,
107 other node types do have values. */
121 struct symtoken ssym;
124 enum exp_opcode opcode;
125 struct internalvar *ivar;
132 /* YYSTYPE gets defined by %union */
133 static int parse_number PARAMS ((char *, int, int, YYSTYPE *));
136 %type <voidval> exp type_exp start variable
137 %type <tval> type typebase
138 %type <tvec> nonempty_typelist
139 /* %type <bval> block */
141 /* Fancy type parsing. */
142 %type <voidval> func_mod direct_abs_decl abs_decl
145 %token <typed_val> INT
148 /* Both NAME and TYPENAME tokens represent symbols in the input,
149 and both convey their data as strings.
150 But a TYPENAME is a string that happens to be defined as a typedef
151 or builtin type name (such as int or char)
152 and a NAME is any other symbol.
153 Contexts where this distinction is not important can use the
154 nonterminal "name", which matches either NAME or TYPENAME. */
156 %token <sval> STRING_LITERAL
157 %token <lval> BOOLEAN_LITERAL
159 %token <tsym> TYPENAME
161 %type <ssym> name_not_typename
162 %type <tsym> typename
164 /* A NAME_OR_INT is a symbol which is not known in the symbol table,
165 but which would parse as a valid number in the current input radix.
166 E.g. "c" when input_radix==16. Depending on the parse, it will be
167 turned into a name or into a number. */
169 %token <ssym> NAME_OR_INT
174 /* Special type cases, put in to allow the parser to distinguish different
176 %token INT_KEYWORD INT_S2_KEYWORD LOGICAL_S1_KEYWORD LOGICAL_S2_KEYWORD
177 %token LOGICAL_KEYWORD REAL_KEYWORD REAL_S8_KEYWORD REAL_S16_KEYWORD
178 %token COMPLEX_S8_KEYWORD COMPLEX_S16_KEYWORD COMPLEX_S32_KEYWORD
179 %token BOOL_AND BOOL_OR BOOL_NOT
180 %token <lval> LAST REGNAME CHARACTER
182 %token <ivar> VARIABLE
184 %token <opcode> ASSIGN_MODIFY
188 %right '=' ASSIGN_MODIFY
197 %left LESSTHAN GREATERTHAN LEQ GEQ
213 { write_exp_elt_opcode(OP_TYPE);
214 write_exp_elt_type($1);
215 write_exp_elt_opcode(OP_TYPE); }
222 /* Expressions, not including the comma operator. */
223 exp : '*' exp %prec UNARY
224 { write_exp_elt_opcode (UNOP_IND); }
226 exp : '&' exp %prec UNARY
227 { write_exp_elt_opcode (UNOP_ADDR); }
229 exp : '-' exp %prec UNARY
230 { write_exp_elt_opcode (UNOP_NEG); }
233 exp : BOOL_NOT exp %prec UNARY
234 { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
237 exp : '~' exp %prec UNARY
238 { write_exp_elt_opcode (UNOP_COMPLEMENT); }
241 exp : SIZEOF exp %prec UNARY
242 { write_exp_elt_opcode (UNOP_SIZEOF); }
245 /* No more explicit array operators, we treat everything in F77 as
246 a function call. The disambiguation as to whether we are
247 doing a subscript operation or a function call is done
251 { start_arglist (); }
253 { write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST);
254 write_exp_elt_longcst ((LONGEST) end_arglist ());
255 write_exp_elt_opcode (OP_F77_UNDETERMINED_ARGLIST); }
268 arglist : arglist ',' exp %prec ABOVE_COMMA
272 substring: exp ':' exp %prec ABOVE_COMMA
277 complexnum: exp ',' exp
281 exp : '(' complexnum ')'
282 { write_exp_elt_opcode(OP_F77_LITERAL_COMPLEX); }
285 exp : '(' type ')' exp %prec UNARY
286 { write_exp_elt_opcode (UNOP_CAST);
287 write_exp_elt_type ($2);
288 write_exp_elt_opcode (UNOP_CAST); }
291 /* Binary operators in order of decreasing precedence. */
294 { write_exp_elt_opcode (BINOP_REPEAT); }
298 { write_exp_elt_opcode (BINOP_MUL); }
302 { write_exp_elt_opcode (BINOP_DIV); }
306 { write_exp_elt_opcode (BINOP_REM); }
310 { write_exp_elt_opcode (BINOP_ADD); }
314 { write_exp_elt_opcode (BINOP_SUB); }
318 { write_exp_elt_opcode (BINOP_LSH); }
322 { write_exp_elt_opcode (BINOP_RSH); }
326 { write_exp_elt_opcode (BINOP_EQUAL); }
329 exp : exp NOTEQUAL exp
330 { write_exp_elt_opcode (BINOP_NOTEQUAL); }
334 { write_exp_elt_opcode (BINOP_LEQ); }
338 { write_exp_elt_opcode (BINOP_GEQ); }
341 exp : exp LESSTHAN exp
342 { write_exp_elt_opcode (BINOP_LESS); }
345 exp : exp GREATERTHAN exp
346 { write_exp_elt_opcode (BINOP_GTR); }
350 { write_exp_elt_opcode (BINOP_BITWISE_AND); }
354 { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
358 { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
361 exp : exp BOOL_AND exp
362 { write_exp_elt_opcode (BINOP_LOGICAL_AND); }
366 exp : exp BOOL_OR exp
367 { write_exp_elt_opcode (BINOP_LOGICAL_OR); }
371 { write_exp_elt_opcode (BINOP_ASSIGN); }
374 exp : exp ASSIGN_MODIFY exp
375 { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
376 write_exp_elt_opcode ($2);
377 write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
381 { write_exp_elt_opcode (OP_LONG);
382 write_exp_elt_type ($1.type);
383 write_exp_elt_longcst ((LONGEST)($1.val));
384 write_exp_elt_opcode (OP_LONG); }
389 parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
390 write_exp_elt_opcode (OP_LONG);
391 write_exp_elt_type (val.typed_val.type);
392 write_exp_elt_longcst ((LONGEST)val.typed_val.val);
393 write_exp_elt_opcode (OP_LONG); }
397 { write_exp_elt_opcode (OP_DOUBLE);
398 write_exp_elt_type (builtin_type_f_real_s8);
399 write_exp_elt_dblcst ($1);
400 write_exp_elt_opcode (OP_DOUBLE); }
407 { write_exp_elt_opcode (OP_LAST);
408 write_exp_elt_longcst ((LONGEST) $1);
409 write_exp_elt_opcode (OP_LAST); }
413 { write_exp_elt_opcode (OP_REGISTER);
414 write_exp_elt_longcst ((LONGEST) $1);
415 write_exp_elt_opcode (OP_REGISTER); }
419 { write_exp_elt_opcode (OP_INTERNALVAR);
420 write_exp_elt_intern ($1);
421 write_exp_elt_opcode (OP_INTERNALVAR); }
424 exp : SIZEOF '(' type ')' %prec UNARY
425 { write_exp_elt_opcode (OP_LONG);
426 write_exp_elt_type (builtin_type_f_integer);
427 write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
428 write_exp_elt_opcode (OP_LONG); }
431 exp : BOOLEAN_LITERAL
432 { write_exp_elt_opcode (OP_BOOL);
433 write_exp_elt_longcst ((LONGEST) $1);
434 write_exp_elt_opcode (OP_BOOL);
439 { /* In F77, we encounter string literals
440 basically in only one place:
441 when we are setting up manual parameter
442 lists to functions we call by hand or
443 when setting string vars to manual values.
444 These are character*N type variables.
445 They are treated specially behind the
446 scenes. Remember that the literal strings's
447 OPs are being emitted in reverse order, thus
448 we first have the elements and then
449 the array descriptor itself. */
450 char *sp = $1.ptr; int count = $1.length;
454 write_exp_elt_opcode (OP_LONG);
455 write_exp_elt_type (builtin_type_f_character);
456 write_exp_elt_longcst ((LONGEST)(*sp++));
457 write_exp_elt_opcode (OP_LONG);
459 write_exp_elt_opcode (OP_ARRAY);
460 write_exp_elt_longcst ((LONGEST) 1);
461 write_exp_elt_longcst ((LONGEST) ($1.length));
462 write_exp_elt_opcode (OP_ARRAY);
467 variable: name_not_typename
468 { struct symbol *sym = $1.sym;
472 if (symbol_read_needs_frame (sym))
474 if (innermost_block == 0 ||
475 contained_in (block_found,
477 innermost_block = block_found;
479 write_exp_elt_opcode (OP_VAR_VALUE);
480 /* We want to use the selected frame, not
481 another more inner frame which happens to
482 be in the same block. */
483 write_exp_elt_block (NULL);
484 write_exp_elt_sym (sym);
485 write_exp_elt_opcode (OP_VAR_VALUE);
490 struct minimal_symbol *msymbol;
491 register char *arg = copy_name ($1.stoken);
493 msymbol = lookup_minimal_symbol (arg, NULL);
496 write_exp_msymbol (msymbol,
497 lookup_function_type (builtin_type_int),
500 else if (!have_full_symbols () && !have_partial_symbols ())
501 error ("No symbol table is loaded. Use the \"file\" command.");
503 error ("No symbol \"%s\" in current context.",
504 copy_name ($1.stoken));
516 /* This is where the interesting stuff happens. */
519 struct type *follow_type = $1;
520 struct type *range_type;
529 follow_type = lookup_pointer_type (follow_type);
532 follow_type = lookup_reference_type (follow_type);
535 array_size = pop_type_int ();
536 if (array_size != -1)
539 create_range_type ((struct type *) NULL,
540 builtin_type_f_integer, 0,
543 create_array_type ((struct type *) NULL,
544 follow_type, range_type);
547 follow_type = lookup_pointer_type (follow_type);
550 follow_type = lookup_function_type (follow_type);
558 { push_type (tp_pointer); $$ = 0; }
560 { push_type (tp_pointer); $$ = $2; }
562 { push_type (tp_reference); $$ = 0; }
564 { push_type (tp_reference); $$ = $2; }
568 direct_abs_decl: '(' abs_decl ')'
570 | direct_abs_decl func_mod
571 { push_type (tp_function); }
573 { push_type (tp_function); }
578 | '(' nonempty_typelist ')'
579 { free ((PTR)$2); $$ = 0; }
582 typebase /* Implements (approximately): (type-qualifier)* type-specifier */
586 { $$ = builtin_type_f_integer; }
588 { $$ = builtin_type_f_integer_s2; }
590 { $$ = builtin_type_f_character; }
592 { $$ = builtin_type_f_logical;}
594 { $$ = builtin_type_f_logical_s2;}
596 { $$ = builtin_type_f_logical_s1;}
598 { $$ = builtin_type_f_real;}
600 { $$ = builtin_type_f_real_s8;}
602 { $$ = builtin_type_f_real_s16;}
604 { $$ = builtin_type_f_complex_s8;}
605 | COMPLEX_S16_KEYWORD
606 { $$ = builtin_type_f_complex_s16;}
607 | COMPLEX_S32_KEYWORD
608 { $$ = builtin_type_f_complex_s32;}
616 { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
617 $<ivec>$[0] = 1; /* Number of types in vector */
620 | nonempty_typelist ',' type
621 { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
622 $$ = (struct type **) realloc ((char *) $1, len);
623 $$[$<ivec>$[0]] = $3;
635 name_not_typename : NAME
636 /* These would be useful if name_not_typename was useful, but it is just
637 a fake for "variable", so these cause reduce/reduce conflicts because
638 the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
639 =exp) or just an exp. If name_not_typename was ever used in an lvalue
640 context where only a name could occur, this might be useful.
647 /* Take care of parsing a number (anything that starts with a digit).
648 Set yylval and return the token type; update lexptr.
649 LEN is the number of characters in it. */
651 /*** Needs some error checking for the float case ***/
654 parse_number (p, len, parsed_float, putithere)
660 register LONGEST n = 0;
661 register LONGEST prevn = 0;
664 register int base = input_radix;
667 unsigned LONGEST high_bit;
668 struct type *signed_type;
669 struct type *unsigned_type;
673 /* It's a float since it contains a point or an exponent. */
674 /* [dD] is not understood as an exponent by atof, change it to 'e'. */
678 for (tmp2 = tmp; *tmp2; ++tmp2)
679 if (*tmp2 == 'd' || *tmp2 == 'D')
681 putithere->dval = atof (tmp);
686 /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
720 if (c >= 'A' && c <= 'Z')
722 if (c != 'l' && c != 'u')
724 if (c >= '0' && c <= '9')
728 if (base > 10 && c >= 'a' && c <= 'f')
729 n += i = c - 'a' + 10;
730 else if (len == 0 && c == 'l')
732 else if (len == 0 && c == 'u')
735 return ERROR; /* Char not a digit */
738 return ERROR; /* Invalid digit in this base */
740 /* Portably test for overflow (only works for nonzero values, so make
741 a second check for zero). */
742 if ((prevn >= n) && n != 0)
743 unsigned_p=1; /* Try something unsigned */
744 /* If range checking enabled, portably test for unsigned overflow. */
745 if (RANGE_CHECK && n != 0)
747 if ((unsigned_p && (unsigned)prevn >= (unsigned)n))
748 range_error("Overflow on numeric constant.");
753 /* If the number is too big to be an int, or it's got an l suffix
754 then it's a long. Work out if this has to be a long by
755 shifting right and and seeing if anything remains, and the
756 target int size is different to the target long size.
758 In the expression below, we could have tested
759 (n >> TARGET_INT_BIT)
760 to see if it was zero,
761 but too many compilers warn about that, when ints and longs
762 are the same size. So we shift it twice, with fewer bits
763 each time, for the same result. */
765 if ((TARGET_INT_BIT != TARGET_LONG_BIT
766 && ((n >> 2) >> (TARGET_INT_BIT-2))) /* Avoid shift warning */
769 high_bit = ((unsigned LONGEST)1) << (TARGET_LONG_BIT-1);
770 unsigned_type = builtin_type_unsigned_long;
771 signed_type = builtin_type_long;
775 high_bit = ((unsigned LONGEST)1) << (TARGET_INT_BIT-1);
776 unsigned_type = builtin_type_unsigned_int;
777 signed_type = builtin_type_int;
780 putithere->typed_val.val = n;
782 /* If the high bit of the worked out type is set then this number
783 has to be unsigned. */
785 if (unsigned_p || (n & high_bit))
786 putithere->typed_val.type = unsigned_type;
788 putithere->typed_val.type = signed_type;
797 enum exp_opcode opcode;
800 static const struct token dot_ops[] =
802 { ".and.", BOOL_AND, BINOP_END },
803 { ".AND.", BOOL_AND, BINOP_END },
804 { ".or.", BOOL_OR, BINOP_END },
805 { ".OR.", BOOL_OR, BINOP_END },
806 { ".not.", BOOL_NOT, BINOP_END },
807 { ".NOT.", BOOL_NOT, BINOP_END },
808 { ".eq.", EQUAL, BINOP_END },
809 { ".EQ.", EQUAL, BINOP_END },
810 { ".eqv.", EQUAL, BINOP_END },
811 { ".NEQV.", NOTEQUAL, BINOP_END },
812 { ".neqv.", NOTEQUAL, BINOP_END },
813 { ".EQV.", EQUAL, BINOP_END },
814 { ".ne.", NOTEQUAL, BINOP_END },
815 { ".NE.", NOTEQUAL, BINOP_END },
816 { ".le.", LEQ, BINOP_END },
817 { ".LE.", LEQ, BINOP_END },
818 { ".ge.", GEQ, BINOP_END },
819 { ".GE.", GEQ, BINOP_END },
820 { ".gt.", GREATERTHAN, BINOP_END },
821 { ".GT.", GREATERTHAN, BINOP_END },
822 { ".lt.", LESSTHAN, BINOP_END },
823 { ".LT.", LESSTHAN, BINOP_END },
827 struct f77_boolean_val
833 static const struct f77_boolean_val boolean_values[] =
842 static const struct token f77_keywords[] =
844 { "complex_16", COMPLEX_S16_KEYWORD, BINOP_END },
845 { "complex_32", COMPLEX_S32_KEYWORD, BINOP_END },
846 { "character", CHARACTER, BINOP_END },
847 { "integer_2", INT_S2_KEYWORD, BINOP_END },
848 { "logical_1", LOGICAL_S1_KEYWORD, BINOP_END },
849 { "logical_2", LOGICAL_S2_KEYWORD, BINOP_END },
850 { "complex_8", COMPLEX_S8_KEYWORD, BINOP_END },
851 { "integer", INT_KEYWORD, BINOP_END },
852 { "logical", LOGICAL_KEYWORD, BINOP_END },
853 { "real_16", REAL_S16_KEYWORD, BINOP_END },
854 { "complex", COMPLEX_S8_KEYWORD, BINOP_END },
855 { "sizeof", SIZEOF, BINOP_END },
856 { "real_8", REAL_S8_KEYWORD, BINOP_END },
857 { "real", REAL_KEYWORD, BINOP_END },
861 /* Implementation of a dynamically expandable buffer for processing input
862 characters acquired through lexptr and building a value to return in
863 yylval. Ripped off from ch-exp.y */
865 static char *tempbuf; /* Current buffer contents */
866 static int tempbufsize; /* Size of allocated buffer */
867 static int tempbufindex; /* Current index into buffer */
869 #define GROWBY_MIN_SIZE 64 /* Minimum amount to grow buffer by */
871 #define CHECKBUF(size) \
873 if (tempbufindex + (size) >= tempbufsize) \
875 growbuf_by_size (size); \
880 /* Grow the static temp buffer if necessary, including allocating the first one
884 growbuf_by_size (count)
889 growby = max (count, GROWBY_MIN_SIZE);
890 tempbufsize += growby;
892 tempbuf = (char *) malloc (tempbufsize);
894 tempbuf = (char *) realloc (tempbuf, tempbufsize);
897 /* Blatantly ripped off from ch-exp.y. This routine recognizes F77
900 Recognize a string literal. A string literal is a nonzero sequence
901 of characters enclosed in matching single quotes, except that
902 a single character inside single quotes is a character literal, which
903 we reject as a string literal. To embed the terminator character inside
904 a string, it is simply doubled (I.E. 'this''is''one''string') */
907 match_string_literal ()
909 char *tokptr = lexptr;
911 for (tempbufindex = 0, tokptr++; *tokptr != '\0'; tokptr++)
914 if (*tokptr == *lexptr)
916 if (*(tokptr + 1) == *lexptr)
921 tempbuf[tempbufindex++] = *tokptr;
923 if (*tokptr == '\0' /* no terminator */
924 || tempbufindex == 0) /* no string */
928 tempbuf[tempbufindex] = '\0';
929 yylval.sval.ptr = tempbuf;
930 yylval.sval.length = tempbufindex;
932 return STRING_LITERAL;
936 /* Read one token, getting characters through lexptr. */
943 unsigned int i,token;
950 /* First of all, let us make sure we are not dealing with the
951 special tokens .true. and .false. which evaluate to 1 and 0. */
955 for (i = 0; boolean_values[i].name != NULL; i++)
957 if STREQN (tokstart, boolean_values[i].name,
958 strlen (boolean_values[i].name))
960 lexptr += strlen (boolean_values[i].name);
961 yylval.lval = boolean_values[i].value;
962 return BOOLEAN_LITERAL;
967 /* See if it is a special .foo. operator */
969 for (i = 0; dot_ops[i].operator != NULL; i++)
970 if (STREQN (tokstart, dot_ops[i].operator, strlen (dot_ops[i].operator)))
972 lexptr += strlen (dot_ops[i].operator);
973 yylval.opcode = dot_ops[i].opcode;
974 return dot_ops[i].token;
977 switch (c = *tokstart)
989 token = match_string_literal ();
1000 if (paren_depth == 0)
1007 if (comma_terminates && paren_depth == 0)
1013 /* Might be a floating point number. */
1014 if (lexptr[1] < '0' || lexptr[1] > '9')
1015 goto symbol; /* Nope, must be a symbol. */
1016 /* FALL THRU into number case. */
1029 /* It's a number. */
1030 int got_dot = 0, got_e = 0, got_d = 0, toktype;
1031 register char *p = tokstart;
1032 int hex = input_radix > 10;
1034 if (c == '0' && (p[1] == 'x' || p[1] == 'X'))
1039 else if (c == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
1047 if (!hex && !got_e && (*p == 'e' || *p == 'E'))
1048 got_dot = got_e = 1;
1049 else if (!hex && !got_d && (*p == 'd' || *p == 'D'))
1050 got_dot = got_d = 1;
1051 else if (!hex && !got_dot && *p == '.')
1053 else if ((got_e && (p[-1] == 'e' || p[-1] == 'E'))
1054 || (got_d && (p[-1] == 'd' || p[-1] == 'D'))
1055 && (*p == '-' || *p == '+'))
1056 /* This is the sign of the exponent, not the end of the
1059 /* We will take any letters or digits. parse_number will
1060 complain if past the radix, or if L or U are not final. */
1061 else if ((*p < '0' || *p > '9')
1062 && ((*p < 'a' || *p > 'z')
1063 && (*p < 'A' || *p > 'Z')))
1066 toktype = parse_number (tokstart, p - tokstart, got_dot|got_e|got_d,
1068 if (toktype == ERROR)
1070 char *err_copy = (char *) alloca (p - tokstart + 1);
1072 memcpy (err_copy, tokstart, p - tokstart);
1073 err_copy[p - tokstart] = 0;
1074 error ("Invalid number \"%s\".", err_copy);
1105 if (!(c == '_' || c == '$'
1106 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')))
1107 /* We must have come across a bad character (e.g. ';'). */
1108 error ("Invalid character '%c' in expression.", c);
1111 for (c = tokstart[namelen];
1112 (c == '_' || c == '$' || (c >= '0' && c <= '9')
1113 || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
1114 c = tokstart[++namelen]);
1116 /* The token "if" terminates the expression and is NOT
1117 removed from the input stream. */
1119 if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
1124 /* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1)
1125 and $$digits (equivalent to $<-digits> if you could type that).
1126 Make token type LAST, and put the number (the digits) in yylval. */
1129 if (*tokstart == '$')
1131 register int negate = 0;
1134 /* Double dollar means negate the number and add -1 as well.
1135 Thus $$ alone means -1. */
1136 if (namelen >= 2 && tokstart[1] == '$')
1143 /* Just dollars (one or two) */
1144 yylval.lval = - negate;
1147 /* Is the rest of the token digits? */
1148 for (; c < namelen; c++)
1149 if (!(tokstart[c] >= '0' && tokstart[c] <= '9'))
1153 yylval.lval = atoi (tokstart + 1 + negate);
1155 yylval.lval = - yylval.lval;
1160 /* Handle tokens that refer to machine registers:
1161 $ followed by a register name. */
1163 if (*tokstart == '$') {
1164 for (c = 0; c < NUM_REGS; c++)
1165 if (namelen - 1 == strlen (reg_names[c])
1166 && STREQN (tokstart + 1, reg_names[c], namelen - 1))
1171 for (c = 0; c < num_std_regs; c++)
1172 if (namelen - 1 == strlen (std_regs[c].name)
1173 && STREQN (tokstart + 1, std_regs[c].name, namelen - 1))
1175 yylval.lval = std_regs[c].regnum;
1179 /* Catch specific keywords. */
1181 for (i = 0; f77_keywords[i].operator != NULL; i++)
1182 if (STREQN(tokstart, f77_keywords[i].operator,
1183 strlen(f77_keywords[i].operator)))
1185 /* lexptr += strlen(f77_keywords[i].operator); */
1186 yylval.opcode = f77_keywords[i].opcode;
1187 return f77_keywords[i].token;
1190 yylval.sval.ptr = tokstart;
1191 yylval.sval.length = namelen;
1193 /* Any other names starting in $ are debugger internal variables. */
1195 if (*tokstart == '$')
1197 yylval.ivar = lookup_internalvar (copy_name (yylval.sval) + 1);
1201 /* Use token-type TYPENAME for symbols that happen to be defined
1202 currently as names of types; NAME for other symbols.
1203 The caller is not constrained to care about the distinction. */
1205 char *tmp = copy_name (yylval.sval);
1207 int is_a_field_of_this = 0;
1210 sym = lookup_symbol (tmp, expression_context_block,
1212 current_language->la_language == language_cplus
1213 ? &is_a_field_of_this : NULL,
1215 if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1217 yylval.tsym.type = SYMBOL_TYPE (sym);
1220 if ((yylval.tsym.type = lookup_primitive_typename (tmp)) != 0)
1223 /* Input names that aren't symbols but ARE valid hex numbers,
1224 when the input radix permits them, can be names or numbers
1225 depending on the parse. Note we support radixes > 16 here. */
1227 && ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10)
1228 || (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
1230 YYSTYPE newlval; /* Its value is ignored. */
1231 hextype = parse_number (tokstart, namelen, 0, &newlval);
1234 yylval.ssym.sym = sym;
1235 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1240 /* Any other kind of symbol */
1241 yylval.ssym.sym = sym;
1242 yylval.ssym.is_a_field_of_this = is_a_field_of_this;
1251 error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);