597 lines
14 KiB
Plaintext
597 lines
14 KiB
Plaintext
/* FLEX lexer for Ada expressions, for GDB.
|
|
Copyright (C) 1994, 1997, 1998, 2000, 2001, 2002, 2003, 2007
|
|
Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
/*----------------------------------------------------------------------*/
|
|
|
|
/* The converted version of this file is to be included in ada-exp.y, */
|
|
/* the Ada parser for gdb. The function yylex obtains characters from */
|
|
/* the global pointer lexptr. It returns a syntactic category for */
|
|
/* each successive token and places a semantic value into yylval */
|
|
/* (ada-lval), defined by the parser. */
|
|
|
|
DIG [0-9]
|
|
NUM10 ({DIG}({DIG}|_)*)
|
|
HEXDIG [0-9a-f]
|
|
NUM16 ({HEXDIG}({HEXDIG}|_)*)
|
|
OCTDIG [0-7]
|
|
LETTER [a-z_]
|
|
ID ({LETTER}({LETTER}|{DIG})*|"<"{LETTER}({LETTER}|{DIG})*">")
|
|
WHITE [ \t\n]
|
|
TICK ("'"{WHITE}*)
|
|
GRAPHIC [a-z0-9 #&'()*+,-./:;<>=_|!$%?@\[\]\\^`{}~]
|
|
OPER ([-+*/=<>&]|"<="|">="|"**"|"/="|"and"|"or"|"xor"|"not"|"mod"|"rem"|"abs")
|
|
|
|
EXP (e[+-]{NUM10})
|
|
POSEXP (e"+"?{NUM10})
|
|
|
|
%{
|
|
|
|
#define NUMERAL_WIDTH 256
|
|
#define LONGEST_SIGN ((ULONGEST) 1 << (sizeof(LONGEST) * HOST_CHAR_BIT - 1))
|
|
|
|
/* Temporary staging for numeric literals. */
|
|
static char numbuf[NUMERAL_WIDTH];
|
|
static void canonicalizeNumeral (char *s1, const char *);
|
|
static struct stoken processString (const char*, int);
|
|
static int processInt (const char *, const char *, const char *);
|
|
static int processReal (const char *);
|
|
static struct stoken processId (const char *, int);
|
|
static int processAttribute (const char *);
|
|
static int find_dot_all (const char *);
|
|
|
|
#undef YY_DECL
|
|
#define YY_DECL static int yylex ( void )
|
|
|
|
#undef YY_INPUT
|
|
#define YY_INPUT(BUF, RESULT, MAX_SIZE) \
|
|
if ( *lexptr == '\000' ) \
|
|
(RESULT) = YY_NULL; \
|
|
else \
|
|
{ \
|
|
*(BUF) = *lexptr; \
|
|
(RESULT) = 1; \
|
|
lexptr += 1; \
|
|
}
|
|
|
|
static int find_dot_all (const char *);
|
|
|
|
%}
|
|
|
|
%option case-insensitive interactive nodefault
|
|
|
|
%s BEFORE_QUAL_QUOTE
|
|
|
|
%%
|
|
|
|
{WHITE} { }
|
|
|
|
"--".* { yyterminate(); }
|
|
|
|
{NUM10}{POSEXP} {
|
|
canonicalizeNumeral (numbuf, yytext);
|
|
return processInt (NULL, numbuf, strrchr(numbuf, 'e')+1);
|
|
}
|
|
|
|
{NUM10} {
|
|
canonicalizeNumeral (numbuf, yytext);
|
|
return processInt (NULL, numbuf, NULL);
|
|
}
|
|
|
|
{NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#"{POSEXP} {
|
|
canonicalizeNumeral (numbuf, yytext);
|
|
return processInt (numbuf,
|
|
strchr (numbuf, '#') + 1,
|
|
strrchr(numbuf, '#') + 1);
|
|
}
|
|
|
|
{NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#" {
|
|
canonicalizeNumeral (numbuf, yytext);
|
|
return processInt (numbuf, strchr (numbuf, '#') + 1, NULL);
|
|
}
|
|
|
|
"0x"{HEXDIG}+ {
|
|
canonicalizeNumeral (numbuf, yytext+2);
|
|
return processInt ("16#", numbuf, NULL);
|
|
}
|
|
|
|
|
|
{NUM10}"."{NUM10}{EXP} {
|
|
canonicalizeNumeral (numbuf, yytext);
|
|
return processReal (numbuf);
|
|
}
|
|
|
|
{NUM10}"."{NUM10} {
|
|
canonicalizeNumeral (numbuf, yytext);
|
|
return processReal (numbuf);
|
|
}
|
|
|
|
{NUM10}"#"{NUM16}"."{NUM16}"#"{EXP} {
|
|
error (_("Based real literals not implemented yet."));
|
|
}
|
|
|
|
{NUM10}"#"{NUM16}"."{NUM16}"#" {
|
|
error (_("Based real literals not implemented yet."));
|
|
}
|
|
|
|
<INITIAL>"'"({GRAPHIC}|\")"'" {
|
|
yylval.typed_val.type = type_char ();
|
|
yylval.typed_val.val = yytext[1];
|
|
return CHARLIT;
|
|
}
|
|
|
|
<INITIAL>"'[\""{HEXDIG}{2}"\"]'" {
|
|
int v;
|
|
yylval.typed_val.type = type_char ();
|
|
sscanf (yytext+3, "%2x", &v);
|
|
yylval.typed_val.val = v;
|
|
return CHARLIT;
|
|
}
|
|
|
|
\"({GRAPHIC}|"[\""({HEXDIG}{2}|\")"\"]")*\" {
|
|
yylval.sval = processString (yytext+1, yyleng-2);
|
|
return STRING;
|
|
}
|
|
|
|
\" {
|
|
error (_("ill-formed or non-terminated string literal"));
|
|
}
|
|
|
|
|
|
if {
|
|
while (*lexptr != 'i' && *lexptr != 'I')
|
|
lexptr -= 1;
|
|
yyrestart(NULL);
|
|
return 0;
|
|
}
|
|
|
|
/* ADA KEYWORDS */
|
|
|
|
abs { return ABS; }
|
|
and { return _AND_; }
|
|
else { return ELSE; }
|
|
in { return IN; }
|
|
mod { return MOD; }
|
|
new { return NEW; }
|
|
not { return NOT; }
|
|
null { return NULL_PTR; }
|
|
or { return OR; }
|
|
others { return OTHERS; }
|
|
rem { return REM; }
|
|
then { return THEN; }
|
|
xor { return XOR; }
|
|
|
|
/* ATTRIBUTES */
|
|
|
|
{TICK}[a-zA-Z][a-zA-Z]+ { return processAttribute (yytext+1); }
|
|
|
|
/* PUNCTUATION */
|
|
|
|
"=>" { return ARROW; }
|
|
".." { return DOTDOT; }
|
|
"**" { return STARSTAR; }
|
|
":=" { return ASSIGN; }
|
|
"/=" { return NOTEQUAL; }
|
|
"<=" { return LEQ; }
|
|
">=" { return GEQ; }
|
|
|
|
<BEFORE_QUAL_QUOTE>"'" { BEGIN INITIAL; return '\''; }
|
|
|
|
[-&*+./:<>=|;\[\]] { return yytext[0]; }
|
|
|
|
"," { if (paren_depth == 0 && comma_terminates)
|
|
{
|
|
lexptr -= 1;
|
|
yyrestart(NULL);
|
|
return 0;
|
|
}
|
|
else
|
|
return ',';
|
|
}
|
|
|
|
"(" { paren_depth += 1; return '('; }
|
|
")" { if (paren_depth == 0)
|
|
{
|
|
lexptr -= 1;
|
|
yyrestart(NULL);
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
paren_depth -= 1;
|
|
return ')';
|
|
}
|
|
}
|
|
|
|
"."{WHITE}*all { return DOT_ALL; }
|
|
|
|
"."{WHITE}*{ID} {
|
|
yylval.sval = processId (yytext+1, yyleng-1);
|
|
return DOT_ID;
|
|
}
|
|
|
|
{ID}({WHITE}*"."{WHITE}*({ID}|\"{OPER}\"))*(" "*"'")? {
|
|
int all_posn = find_dot_all (yytext);
|
|
|
|
if (all_posn == -1 && yytext[yyleng-1] == '\'')
|
|
{
|
|
BEGIN BEFORE_QUAL_QUOTE;
|
|
yyless (yyleng-1);
|
|
}
|
|
else if (all_posn >= 0)
|
|
yyless (all_posn);
|
|
yylval.sval = processId (yytext, yyleng);
|
|
return NAME;
|
|
}
|
|
|
|
|
|
/* GDB EXPRESSION CONSTRUCTS */
|
|
|
|
"'"[^']+"'"{WHITE}*:: {
|
|
yyless (yyleng - 2);
|
|
yylval.sval = processId (yytext, yyleng);
|
|
return NAME;
|
|
}
|
|
|
|
"::" { return COLONCOLON; }
|
|
|
|
[{}@] { return yytext[0]; }
|
|
|
|
/* REGISTERS AND GDB CONVENIENCE VARIABLES */
|
|
|
|
"$"({LETTER}|{DIG}|"$")* {
|
|
yylval.sval.ptr = yytext;
|
|
yylval.sval.length = yyleng;
|
|
return SPECIAL_VARIABLE;
|
|
}
|
|
|
|
/* CATCH-ALL ERROR CASE */
|
|
|
|
. { error (_("Invalid character '%s' in expression."), yytext); }
|
|
%%
|
|
|
|
#include <ctype.h>
|
|
#include "gdb_string.h"
|
|
|
|
/* Initialize the lexer for processing new expression. */
|
|
|
|
void
|
|
lexer_init (FILE *inp)
|
|
{
|
|
BEGIN INITIAL;
|
|
yyrestart (inp);
|
|
}
|
|
|
|
|
|
/* Copy S2 to S1, removing all underscores, and downcasing all letters. */
|
|
|
|
static void
|
|
canonicalizeNumeral (char *s1, const char *s2)
|
|
{
|
|
for (; *s2 != '\000'; s2 += 1)
|
|
{
|
|
if (*s2 != '_')
|
|
{
|
|
*s1 = tolower(*s2);
|
|
s1 += 1;
|
|
}
|
|
}
|
|
s1[0] = '\000';
|
|
}
|
|
|
|
/* Interprets the prefix of NUM that consists of digits of the given BASE
|
|
as an integer of that BASE, with the string EXP as an exponent.
|
|
Puts value in yylval, and returns INT, if the string is valid. Causes
|
|
an error if the number is improperly formated. BASE, if NULL, defaults
|
|
to "10", and EXP to "1". The EXP does not contain a leading 'e' or 'E'.
|
|
*/
|
|
|
|
static int
|
|
processInt (const char *base0, const char *num0, const char *exp0)
|
|
{
|
|
ULONGEST result;
|
|
long exp;
|
|
int base;
|
|
|
|
char *trailer;
|
|
|
|
if (base0 == NULL)
|
|
base = 10;
|
|
else
|
|
{
|
|
base = strtol (base0, (char **) NULL, 10);
|
|
if (base < 2 || base > 16)
|
|
error (_("Invalid base: %d."), base);
|
|
}
|
|
|
|
if (exp0 == NULL)
|
|
exp = 0;
|
|
else
|
|
exp = strtol(exp0, (char **) NULL, 10);
|
|
|
|
errno = 0;
|
|
result = strtoulst (num0, (const char **) &trailer, base);
|
|
if (errno == ERANGE)
|
|
error (_("Integer literal out of range"));
|
|
if (isxdigit(*trailer))
|
|
error (_("Invalid digit `%c' in based literal"), *trailer);
|
|
|
|
while (exp > 0)
|
|
{
|
|
if (result > (ULONG_MAX / base))
|
|
error (_("Integer literal out of range"));
|
|
result *= base;
|
|
exp -= 1;
|
|
}
|
|
|
|
if ((result >> (TARGET_INT_BIT-1)) == 0)
|
|
yylval.typed_val.type = type_int ();
|
|
else if ((result >> (TARGET_LONG_BIT-1)) == 0)
|
|
yylval.typed_val.type = type_long ();
|
|
else if (((result >> (TARGET_LONG_BIT-1)) >> 1) == 0)
|
|
{
|
|
/* We have a number representable as an unsigned integer quantity.
|
|
For consistency with the C treatment, we will treat it as an
|
|
anonymous modular (unsigned) quantity. Alas, the types are such
|
|
that we need to store .val as a signed quantity. Sorry
|
|
for the mess, but C doesn't officially guarantee that a simple
|
|
assignment does the trick (no, it doesn't; read the reference manual).
|
|
*/
|
|
yylval.typed_val.type = builtin_type_unsigned_long;
|
|
if (result & LONGEST_SIGN)
|
|
yylval.typed_val.val =
|
|
(LONGEST) (result & ~LONGEST_SIGN)
|
|
- (LONGEST_SIGN>>1) - (LONGEST_SIGN>>1);
|
|
else
|
|
yylval.typed_val.val = (LONGEST) result;
|
|
return INT;
|
|
}
|
|
else
|
|
yylval.typed_val.type = type_long_long ();
|
|
|
|
yylval.typed_val.val = (LONGEST) result;
|
|
return INT;
|
|
}
|
|
|
|
static int
|
|
processReal (const char *num0)
|
|
{
|
|
sscanf (num0, DOUBLEST_SCAN_FORMAT, &yylval.typed_val_float.dval);
|
|
|
|
yylval.typed_val_float.type = type_float ();
|
|
if (sizeof(DOUBLEST) >= TARGET_DOUBLE_BIT / TARGET_CHAR_BIT)
|
|
yylval.typed_val_float.type = type_double ();
|
|
if (sizeof(DOUBLEST) >= TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT)
|
|
yylval.typed_val_float.type = type_long_double ();
|
|
|
|
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. 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 = obstack_alloc (&temp_parse_space, len + 11);
|
|
int i0, i;
|
|
struct stoken result;
|
|
|
|
while (len > 0 && isspace (name0[len-1]))
|
|
len -= 1;
|
|
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.ptr = name;
|
|
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 = result.ptr = obstack_alloc (&temp_parse_space, len);
|
|
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 += 1)
|
|
{
|
|
if (str[i] == '.')
|
|
{
|
|
int i0 = i;
|
|
do
|
|
i += 1;
|
|
while (isspace (str[i]));
|
|
if (strncmp (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;
|
|
}
|
|
|
|
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
|
|
};
|