mirror of
https://sourceware.org/git/binutils-gdb.git
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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.
657 lines
16 KiB
Plaintext
657 lines
16 KiB
Plaintext
/* FLEX lexer for Ada expressions, for GDB.
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Copyright (C) 1994-2017 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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/*----------------------------------------------------------------------*/
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/* The converted version of this file is to be included in ada-exp.y, */
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/* the Ada parser for gdb. The function yylex obtains characters from */
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/* the global pointer lexptr. It returns a syntactic category for */
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/* each successive token and places a semantic value into yylval */
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/* (ada-lval), defined by the parser. */
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DIG [0-9]
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NUM10 ({DIG}({DIG}|_)*)
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HEXDIG [0-9a-f]
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NUM16 ({HEXDIG}({HEXDIG}|_)*)
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OCTDIG [0-7]
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LETTER [a-z_]
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ID ({LETTER}({LETTER}|{DIG})*|"<"{LETTER}({LETTER}|{DIG})*">")
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WHITE [ \t\n]
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TICK ("'"{WHITE}*)
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GRAPHIC [a-z0-9 #&'()*+,-./:;<>=_|!$%?@\[\]\\^`{}~]
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OPER ([-+*/=<>&]|"<="|">="|"**"|"/="|"and"|"or"|"xor"|"not"|"mod"|"rem"|"abs")
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EXP (e[+-]{NUM10})
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POSEXP (e"+"?{NUM10})
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%{
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#include "common/diagnostics.h"
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/* Some old versions of flex generate code that uses the "register" keyword,
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which clang warns about. This was observed for example with flex 2.5.35,
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as shipped with macOS 10.12. */
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DIAGNOSTIC_PUSH
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DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER
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#define NUMERAL_WIDTH 256
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#define LONGEST_SIGN ((ULONGEST) 1 << (sizeof(LONGEST) * HOST_CHAR_BIT - 1))
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/* Temporary staging for numeric literals. */
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static char numbuf[NUMERAL_WIDTH];
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static void canonicalizeNumeral (char *s1, const char *);
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static struct stoken processString (const char*, int);
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static int processInt (struct parser_state *, const char *, const char *,
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const char *);
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static int processReal (struct parser_state *, const char *);
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static struct stoken processId (const char *, int);
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static int processAttribute (const char *);
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static int find_dot_all (const char *);
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static void rewind_to_char (int);
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#undef YY_DECL
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#define YY_DECL static int yylex ( void )
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/* Flex generates a static function "input" which is not used.
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Defining YY_NO_INPUT comments it out. */
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#define YY_NO_INPUT
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#undef YY_INPUT
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#define YY_INPUT(BUF, RESULT, MAX_SIZE) \
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if ( *lexptr == '\000' ) \
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(RESULT) = YY_NULL; \
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else \
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{ \
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*(BUF) = *lexptr; \
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(RESULT) = 1; \
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lexptr += 1; \
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}
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static int find_dot_all (const char *);
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%}
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%option case-insensitive interactive nodefault
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%s BEFORE_QUAL_QUOTE
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%%
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{WHITE} { }
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"--".* { yyterminate(); }
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{NUM10}{POSEXP} {
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canonicalizeNumeral (numbuf, yytext);
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return processInt (pstate, NULL, numbuf,
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strrchr (numbuf, 'e') + 1);
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}
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{NUM10} {
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canonicalizeNumeral (numbuf, yytext);
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return processInt (pstate, NULL, numbuf, NULL);
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}
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{NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#"{POSEXP} {
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canonicalizeNumeral (numbuf, yytext);
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return processInt (pstate, numbuf,
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strchr (numbuf, '#') + 1,
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strrchr(numbuf, '#') + 1);
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}
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{NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#" {
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canonicalizeNumeral (numbuf, yytext);
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return processInt (pstate, numbuf, strchr (numbuf, '#') + 1,
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NULL);
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}
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"0x"{HEXDIG}+ {
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canonicalizeNumeral (numbuf, yytext+2);
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return processInt (pstate, "16#", numbuf, NULL);
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}
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{NUM10}"."{NUM10}{EXP} {
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canonicalizeNumeral (numbuf, yytext);
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return processReal (pstate, numbuf);
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}
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{NUM10}"."{NUM10} {
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canonicalizeNumeral (numbuf, yytext);
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return processReal (pstate, numbuf);
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}
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{NUM10}"#"{NUM16}"."{NUM16}"#"{EXP} {
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error (_("Based real literals not implemented yet."));
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}
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{NUM10}"#"{NUM16}"."{NUM16}"#" {
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error (_("Based real literals not implemented yet."));
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}
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<INITIAL>"'"({GRAPHIC}|\")"'" {
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yylval.typed_val.type = type_char (pstate);
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yylval.typed_val.val = yytext[1];
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return CHARLIT;
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}
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<INITIAL>"'[\""{HEXDIG}{2}"\"]'" {
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int v;
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yylval.typed_val.type = type_char (pstate);
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sscanf (yytext+3, "%2x", &v);
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yylval.typed_val.val = v;
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return CHARLIT;
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}
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\"({GRAPHIC}|"[\""({HEXDIG}{2}|\")"\"]")*\" {
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yylval.sval = processString (yytext+1, yyleng-2);
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return STRING;
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}
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\" {
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error (_("ill-formed or non-terminated string literal"));
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}
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if {
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rewind_to_char ('i');
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return 0;
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}
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task {
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rewind_to_char ('t');
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return 0;
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}
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thread{WHITE}+{DIG} {
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/* This keyword signals the end of the expression and
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will be processed separately. */
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rewind_to_char ('t');
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return 0;
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}
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/* ADA KEYWORDS */
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abs { return ABS; }
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and { return _AND_; }
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else { return ELSE; }
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in { return IN; }
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mod { return MOD; }
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new { return NEW; }
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not { return NOT; }
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null { return NULL_PTR; }
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or { return OR; }
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others { return OTHERS; }
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rem { return REM; }
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then { return THEN; }
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xor { return XOR; }
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/* BOOLEAN "KEYWORDS" */
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/* True and False are not keywords in Ada, but rather enumeration constants.
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However, the boolean type is no longer represented as an enum, so True
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and False are no longer defined in symbol tables. We compromise by
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making them keywords (when bare). */
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true { return TRUEKEYWORD; }
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false { return FALSEKEYWORD; }
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/* ATTRIBUTES */
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{TICK}[a-zA-Z][a-zA-Z]+ { BEGIN INITIAL; return processAttribute (yytext+1); }
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/* PUNCTUATION */
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"=>" { return ARROW; }
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".." { return DOTDOT; }
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"**" { return STARSTAR; }
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":=" { return ASSIGN; }
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"/=" { return NOTEQUAL; }
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"<=" { return LEQ; }
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">=" { return GEQ; }
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<BEFORE_QUAL_QUOTE>"'" { BEGIN INITIAL; return '\''; }
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[-&*+./:<>=|;\[\]] { return yytext[0]; }
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"," { if (paren_depth == 0 && comma_terminates)
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{
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rewind_to_char (',');
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return 0;
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}
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else
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return ',';
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}
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"(" { paren_depth += 1; return '('; }
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")" { if (paren_depth == 0)
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{
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rewind_to_char (')');
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return 0;
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}
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else
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{
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paren_depth -= 1;
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return ')';
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}
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}
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"."{WHITE}*all { return DOT_ALL; }
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"."{WHITE}*{ID} {
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yylval.sval = processId (yytext+1, yyleng-1);
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return DOT_ID;
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}
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{ID}({WHITE}*"."{WHITE}*({ID}|\"{OPER}\"))*(" "*"'")? {
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int all_posn = find_dot_all (yytext);
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if (all_posn == -1 && yytext[yyleng-1] == '\'')
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{
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BEGIN BEFORE_QUAL_QUOTE;
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yyless (yyleng-1);
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}
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else if (all_posn >= 0)
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yyless (all_posn);
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yylval.sval = processId (yytext, yyleng);
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return NAME;
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}
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/* GDB EXPRESSION CONSTRUCTS */
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"'"[^']+"'"{WHITE}*:: {
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yyless (yyleng - 2);
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yylval.sval = processId (yytext, yyleng);
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return NAME;
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}
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"::" { return COLONCOLON; }
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[{}@] { return yytext[0]; }
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/* REGISTERS AND GDB CONVENIENCE VARIABLES */
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"$"({LETTER}|{DIG}|"$")* {
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yylval.sval.ptr = yytext;
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yylval.sval.length = yyleng;
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return SPECIAL_VARIABLE;
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}
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/* CATCH-ALL ERROR CASE */
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. { error (_("Invalid character '%s' in expression."), yytext); }
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%%
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#include <ctype.h>
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/* Initialize the lexer for processing new expression. */
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static void
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lexer_init (FILE *inp)
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{
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BEGIN INITIAL;
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yyrestart (inp);
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}
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/* Copy S2 to S1, removing all underscores, and downcasing all letters. */
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static void
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canonicalizeNumeral (char *s1, const char *s2)
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{
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for (; *s2 != '\000'; s2 += 1)
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{
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if (*s2 != '_')
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{
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*s1 = tolower(*s2);
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s1 += 1;
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}
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}
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s1[0] = '\000';
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}
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/* Interprets the prefix of NUM that consists of digits of the given BASE
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as an integer of that BASE, with the string EXP as an exponent.
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Puts value in yylval, and returns INT, if the string is valid. Causes
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an error if the number is improperly formated. BASE, if NULL, defaults
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to "10", and EXP to "1". The EXP does not contain a leading 'e' or 'E'.
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*/
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static int
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processInt (struct parser_state *par_state, const char *base0,
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const char *num0, const char *exp0)
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{
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ULONGEST result;
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long exp;
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int base;
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const char *trailer;
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if (base0 == NULL)
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base = 10;
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else
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{
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base = strtol (base0, (char **) NULL, 10);
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if (base < 2 || base > 16)
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error (_("Invalid base: %d."), base);
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}
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if (exp0 == NULL)
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exp = 0;
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else
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exp = strtol(exp0, (char **) NULL, 10);
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errno = 0;
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result = strtoulst (num0, &trailer, base);
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if (errno == ERANGE)
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error (_("Integer literal out of range"));
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if (isxdigit(*trailer))
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error (_("Invalid digit `%c' in based literal"), *trailer);
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while (exp > 0)
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{
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if (result > (ULONG_MAX / base))
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error (_("Integer literal out of range"));
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result *= base;
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exp -= 1;
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}
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if ((result >> (gdbarch_int_bit (parse_gdbarch (par_state))-1)) == 0)
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yylval.typed_val.type = type_int (par_state);
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else if ((result >> (gdbarch_long_bit (parse_gdbarch (par_state))-1)) == 0)
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yylval.typed_val.type = type_long (par_state);
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else if (((result >> (gdbarch_long_bit (parse_gdbarch (par_state))-1)) >> 1) == 0)
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{
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/* We have a number representable as an unsigned integer quantity.
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For consistency with the C treatment, we will treat it as an
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anonymous modular (unsigned) quantity. Alas, the types are such
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that we need to store .val as a signed quantity. Sorry
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for the mess, but C doesn't officially guarantee that a simple
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assignment does the trick (no, it doesn't; read the reference manual).
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*/
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yylval.typed_val.type
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= builtin_type (parse_gdbarch (par_state))->builtin_unsigned_long;
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if (result & LONGEST_SIGN)
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yylval.typed_val.val =
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(LONGEST) (result & ~LONGEST_SIGN)
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- (LONGEST_SIGN>>1) - (LONGEST_SIGN>>1);
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else
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yylval.typed_val.val = (LONGEST) result;
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return INT;
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}
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else
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yylval.typed_val.type = type_long_long (par_state);
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yylval.typed_val.val = (LONGEST) result;
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return INT;
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}
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static int
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processReal (struct parser_state *par_state, const char *num0)
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{
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yylval.typed_val_float.type = type_long_double (par_state);
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bool parsed = parse_float (num0, strlen (num0),
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yylval.typed_val_float.type,
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yylval.typed_val_float.val);
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gdb_assert (parsed);
|
|
return FLOAT;
|
|
}
|
|
|
|
|
|
/* Store a canonicalized version of NAME0[0..LEN-1] in yylval.ssym. The
|
|
resulting string is valid until the next call to ada_parse. If
|
|
NAME0 contains the substring "___", it is assumed to be already
|
|
encoded and the resulting name is equal to it. Otherwise, it differs
|
|
from NAME0 in that:
|
|
+ Characters between '...' or <...> are transfered verbatim to
|
|
yylval.ssym.
|
|
+ <, >, and trailing "'" characters in quoted sequences are removed
|
|
(a leading quote is preserved to indicate that the name is not to be
|
|
GNAT-encoded).
|
|
+ Unquoted whitespace is removed.
|
|
+ Unquoted alphabetic characters are mapped to lower case.
|
|
Result is returned as a struct stoken, but for convenience, the string
|
|
is also null-terminated. Result string valid until the next call of
|
|
ada_parse.
|
|
*/
|
|
static struct stoken
|
|
processId (const char *name0, int len)
|
|
{
|
|
char *name = (char *) obstack_alloc (&temp_parse_space, len + 11);
|
|
int i0, i;
|
|
struct stoken result;
|
|
|
|
result.ptr = name;
|
|
while (len > 0 && isspace (name0[len-1]))
|
|
len -= 1;
|
|
|
|
if (strstr (name0, "___") != NULL)
|
|
{
|
|
strncpy (name, name0, len);
|
|
name[len] = '\000';
|
|
result.length = len;
|
|
return result;
|
|
}
|
|
|
|
i = i0 = 0;
|
|
while (i0 < len)
|
|
{
|
|
if (isalnum (name0[i0]))
|
|
{
|
|
name[i] = tolower (name0[i0]);
|
|
i += 1; i0 += 1;
|
|
}
|
|
else switch (name0[i0])
|
|
{
|
|
default:
|
|
name[i] = name0[i0];
|
|
i += 1; i0 += 1;
|
|
break;
|
|
case ' ': case '\t':
|
|
i0 += 1;
|
|
break;
|
|
case '\'':
|
|
do
|
|
{
|
|
name[i] = name0[i0];
|
|
i += 1; i0 += 1;
|
|
}
|
|
while (i0 < len && name0[i0] != '\'');
|
|
i0 += 1;
|
|
break;
|
|
case '<':
|
|
i0 += 1;
|
|
while (i0 < len && name0[i0] != '>')
|
|
{
|
|
name[i] = name0[i0];
|
|
i += 1; i0 += 1;
|
|
}
|
|
i0 += 1;
|
|
break;
|
|
}
|
|
}
|
|
name[i] = '\000';
|
|
|
|
result.length = i;
|
|
return result;
|
|
}
|
|
|
|
/* Return TEXT[0..LEN-1], a string literal without surrounding quotes,
|
|
with special hex character notations replaced with characters.
|
|
Result valid until the next call to ada_parse. */
|
|
|
|
static struct stoken
|
|
processString (const char *text, int len)
|
|
{
|
|
const char *p;
|
|
char *q;
|
|
const char *lim = text + len;
|
|
struct stoken result;
|
|
|
|
q = (char *) obstack_alloc (&temp_parse_space, len);
|
|
result.ptr = q;
|
|
p = text;
|
|
while (p < lim)
|
|
{
|
|
if (p[0] == '[' && p[1] == '"' && p+2 < lim)
|
|
{
|
|
if (p[2] == '"') /* "...["""]... */
|
|
{
|
|
*q = '"';
|
|
p += 4;
|
|
}
|
|
else
|
|
{
|
|
int chr;
|
|
sscanf (p+2, "%2x", &chr);
|
|
*q = (char) chr;
|
|
p += 5;
|
|
}
|
|
}
|
|
else
|
|
*q = *p;
|
|
q += 1;
|
|
p += 1;
|
|
}
|
|
result.length = q - result.ptr;
|
|
return result;
|
|
}
|
|
|
|
/* Returns the position within STR of the '.' in a
|
|
'.{WHITE}*all' component of a dotted name, or -1 if there is none.
|
|
Note: we actually don't need this routine, since 'all' can never be an
|
|
Ada identifier. Thus, looking up foo.all or foo.all.x as a name
|
|
must fail, and will eventually be interpreted as (foo).all or
|
|
(foo).all.x. However, this does avoid an extraneous lookup. */
|
|
|
|
static int
|
|
find_dot_all (const char *str)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; str[i] != '\000'; i++)
|
|
if (str[i] == '.')
|
|
{
|
|
int i0 = i;
|
|
|
|
do
|
|
i += 1;
|
|
while (isspace (str[i]));
|
|
|
|
if (strncasecmp (str + i, "all", 3) == 0
|
|
&& !isalnum (str[i + 3]) && str[i + 3] != '_')
|
|
return i0;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/* Returns non-zero iff string SUBSEQ matches a subsequence of STR, ignoring
|
|
case. */
|
|
|
|
static int
|
|
subseqMatch (const char *subseq, const char *str)
|
|
{
|
|
if (subseq[0] == '\0')
|
|
return 1;
|
|
else if (str[0] == '\0')
|
|
return 0;
|
|
else if (tolower (subseq[0]) == tolower (str[0]))
|
|
return subseqMatch (subseq+1, str+1) || subseqMatch (subseq, str+1);
|
|
else
|
|
return subseqMatch (subseq, str+1);
|
|
}
|
|
|
|
|
|
static struct { const char *name; int code; }
|
|
attributes[] = {
|
|
{ "address", TICK_ADDRESS },
|
|
{ "unchecked_access", TICK_ACCESS },
|
|
{ "unrestricted_access", TICK_ACCESS },
|
|
{ "access", TICK_ACCESS },
|
|
{ "first", TICK_FIRST },
|
|
{ "last", TICK_LAST },
|
|
{ "length", TICK_LENGTH },
|
|
{ "max", TICK_MAX },
|
|
{ "min", TICK_MIN },
|
|
{ "modulus", TICK_MODULUS },
|
|
{ "pos", TICK_POS },
|
|
{ "range", TICK_RANGE },
|
|
{ "size", TICK_SIZE },
|
|
{ "tag", TICK_TAG },
|
|
{ "val", TICK_VAL },
|
|
{ NULL, -1 }
|
|
};
|
|
|
|
/* Return the syntactic code corresponding to the attribute name or
|
|
abbreviation STR. */
|
|
|
|
static int
|
|
processAttribute (const char *str)
|
|
{
|
|
int i, k;
|
|
|
|
for (i = 0; attributes[i].code != -1; i += 1)
|
|
if (strcasecmp (str, attributes[i].name) == 0)
|
|
return attributes[i].code;
|
|
|
|
for (i = 0, k = -1; attributes[i].code != -1; i += 1)
|
|
if (subseqMatch (str, attributes[i].name))
|
|
{
|
|
if (k == -1)
|
|
k = i;
|
|
else
|
|
error (_("ambiguous attribute name: `%s'"), str);
|
|
}
|
|
if (k == -1)
|
|
error (_("unrecognized attribute: `%s'"), str);
|
|
|
|
return attributes[k].code;
|
|
}
|
|
|
|
/* Back up lexptr by yyleng and then to the rightmost occurrence of
|
|
character CH, case-folded (there must be one). WARNING: since
|
|
lexptr points to the next input character that Flex has not yet
|
|
transferred to its internal buffer, the use of this function
|
|
depends on the assumption that Flex calls YY_INPUT only when it is
|
|
logically necessary to do so (thus, there is no reading ahead
|
|
farther than needed to identify the next token.) */
|
|
|
|
static void
|
|
rewind_to_char (int ch)
|
|
{
|
|
lexptr -= yyleng;
|
|
while (toupper (*lexptr) != toupper (ch))
|
|
lexptr -= 1;
|
|
yyrestart (NULL);
|
|
}
|
|
|
|
int
|
|
yywrap(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
/* Dummy definition to suppress warnings about unused static definitions. */
|
|
typedef void (*dummy_function) ();
|
|
dummy_function ada_flex_use[] =
|
|
{
|
|
(dummy_function) yyunput
|
|
};
|
|
|
|
DIAGNOSTIC_POP
|