-/* FLEX lexer for Ada expressions, for GDB.
- Copyright (C) 1994-2014 Free Software Foundation, Inc.
+/* FLEX lexer for Ada expressions, for GDB. -*- c++ -*-
+ Copyright (C) 1994-2023 Free Software Foundation, Inc.
This file is part of GDB.
NUM16 ({HEXDIG}({HEXDIG}|_)*)
OCTDIG [0-7]
LETTER [a-z_]
-ID ({LETTER}({LETTER}|{DIG})*|"<"{LETTER}({LETTER}|{DIG})*">")
+ID ({LETTER}({LETTER}|{DIG}|[\x80-\xff])*|"<"{LETTER}({LETTER}|{DIG})*">")
WHITE [ \t\n]
TICK ("'"{WHITE}*)
GRAPHIC [a-z0-9 #&'()*+,-./:;<>=_|!$%?@\[\]\\^`{}~]
EXP (e[+-]{NUM10})
POSEXP (e"+"?{NUM10})
+/* This must agree with COMPLETION_CHAR below. See the comment there
+ for the explanation. */
+COMPLETE "\001"
+NOT_COMPLETE [^\001]
+
%{
+#include "diagnostics.h"
+
+/* Some old versions of flex generate code that uses the "register" keyword,
+ which clang warns about. This was observed for example with flex 2.5.35,
+ as shipped with macOS 10.12. The same happens with flex 2.5.37 and g++ 11
+ which defaults to ISO C++17, that does not allow register storage class
+ specifiers. */
+DIAGNOSTIC_PUSH
+DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER
+
#define NUMERAL_WIDTH 256
#define LONGEST_SIGN ((ULONGEST) 1 << (sizeof(LONGEST) * HOST_CHAR_BIT - 1))
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 int processInt (struct parser_state *, const char *, const char *,
+ const char *);
+static int processReal (struct parser_state *, const char *);
static struct stoken processId (const char *, int);
static int processAttribute (const char *);
static int find_dot_all (const char *);
Defining YY_NO_INPUT comments it out. */
#define YY_NO_INPUT
+/* When completing, we'll return a special character at the end of the
+ input, to signal the completion position to the lexer. This is
+ done because flex does not have a generally useful way to detect
+ EOF in a pattern. This variable records whether the special
+ character has been emitted. */
+static bool returned_complete = false;
+
+/* The character we use to represent the completion point. */
+#define COMPLETE_CHAR '\001'
+
#undef YY_INPUT
-#define YY_INPUT(BUF, RESULT, MAX_SIZE) \
- if ( *lexptr == '\000' ) \
- (RESULT) = YY_NULL; \
- else \
- { \
- *(BUF) = *lexptr; \
- (RESULT) = 1; \
- lexptr += 1; \
- }
+#define YY_INPUT(BUF, RESULT, MAX_SIZE) \
+ if ( *pstate->lexptr == '\000' ) \
+ { \
+ if (pstate->parse_completion && !returned_complete) \
+ { \
+ returned_complete = true; \
+ *(BUF) = COMPLETE_CHAR; \
+ (RESULT) = 1; \
+ } \
+ else \
+ (RESULT) = YY_NULL; \
+ } \
+ else \
+ { \
+ *(BUF) = *pstate->lexptr == COMPLETE_CHAR ? ' ' : *pstate->lexptr; \
+ (RESULT) = 1; \
+ pstate->lexptr += 1; \
+ }
-static int find_dot_all (const char *);
+/* Depth of parentheses. */
+static int paren_depth;
%}
-%option case-insensitive interactive nodefault
+%option case-insensitive interactive nodefault noyywrap
%s BEFORE_QUAL_QUOTE
{NUM10}{POSEXP} {
canonicalizeNumeral (numbuf, yytext);
- return processInt (NULL, numbuf, strrchr(numbuf, 'e')+1);
+ char *e_ptr = strrchr (numbuf, 'e');
+ *e_ptr = '\0';
+ return processInt (pstate, nullptr, numbuf, e_ptr + 1);
}
{NUM10} {
canonicalizeNumeral (numbuf, yytext);
- return processInt (NULL, numbuf, NULL);
+ return processInt (pstate, NULL, numbuf, NULL);
}
{NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#"{POSEXP} {
canonicalizeNumeral (numbuf, yytext);
- return processInt (numbuf,
+ char *e_ptr = strrchr (numbuf, 'e');
+ *e_ptr = '\0';
+ return processInt (pstate, numbuf,
strchr (numbuf, '#') + 1,
- strrchr(numbuf, '#') + 1);
+ e_ptr + 1);
}
-{NUM10}"#"{HEXDIG}({HEXDIG}|_)*"#" {
+ /* The "llf" is a gdb extension to allow a floating-point
+ constant to be written in some other base. The
+ floating-point number is formed by reinterpreting the
+ bytes, allowing direct control over the bits. */
+{NUM10}(l{0,2}f)?"#"{HEXDIG}({HEXDIG}|_)*"#" {
canonicalizeNumeral (numbuf, yytext);
- return processInt (numbuf, strchr (numbuf, '#') + 1, NULL);
+ return processInt (pstate, numbuf, strchr (numbuf, '#') + 1,
+ NULL);
}
"0x"{HEXDIG}+ {
canonicalizeNumeral (numbuf, yytext+2);
- return processInt ("16#", numbuf, NULL);
+ return processInt (pstate, "16#", numbuf, NULL);
}
{NUM10}"."{NUM10}{EXP} {
canonicalizeNumeral (numbuf, yytext);
- return processReal (numbuf);
+ return processReal (pstate, numbuf);
}
{NUM10}"."{NUM10} {
canonicalizeNumeral (numbuf, yytext);
- return processReal (numbuf);
+ return processReal (pstate, numbuf);
}
{NUM10}"#"{NUM16}"."{NUM16}"#"{EXP} {
}
<INITIAL>"'"({GRAPHIC}|\")"'" {
- yylval.typed_val.type = type_char ();
- yylval.typed_val.val = yytext[1];
+ yylval.typed_char.val = yytext[1];
+ yylval.typed_char.type = type_for_char (pstate, 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;
+<INITIAL>"'[\""{HEXDIG}{2,}"\"]'" {
+ ULONGEST v = strtoulst (yytext+3, nullptr, 16);
+ yylval.typed_char.val = v;
+ yylval.typed_char.type = type_for_char (pstate, v);
return CHARLIT;
}
-\"({GRAPHIC}|"[\""({HEXDIG}{2}|\")"\"]")*\" {
+ /* Note that we don't handle bracket sequences of more than 2
+ digits here. Currently there's no support for wide or
+ wide-wide strings. */
+\"({GRAPHIC}|"[\""({HEXDIG}{2,}|\")"\"]")*\" {
yylval.sval = processString (yytext+1, yyleng-2);
return STRING;
}
/* ATTRIBUTES */
-{TICK}[a-zA-Z][a-zA-Z]+ { return processAttribute (yytext+1); }
+{TICK}([a-z][a-z_]*)?{COMPLETE}? { BEGIN INITIAL; return processAttribute (yytext); }
/* PUNCTUATION */
"<=" { return LEQ; }
">=" { return GEQ; }
-<BEFORE_QUAL_QUOTE>"'" { BEGIN INITIAL; return '\''; }
+<BEFORE_QUAL_QUOTE>"'"/{NOT_COMPLETE} { BEGIN INITIAL; return '\''; }
-[-&*+./:<>=|;\[\]] { return yytext[0]; }
+[-&*+{}@/:<>=|;\[\]] { return yytext[0]; }
-"," { if (paren_depth == 0 && comma_terminates)
+"," { if (paren_depth == 0 && pstate->comma_terminates)
{
rewind_to_char (',');
return 0;
}
}
-"."{WHITE}*all { return DOT_ALL; }
-
-"."{WHITE}*{ID} {
+"."{WHITE}*{ID}{COMPLETE}? {
yylval.sval = processId (yytext+1, yyleng-1);
+ if (yytext[yyleng - 1] == COMPLETE_CHAR)
+ return DOT_COMPLETE;
return DOT_ID;
}
-{ID}({WHITE}*"."{WHITE}*({ID}|\"{OPER}\"))*(" "*"'")? {
+"."{WHITE}*{COMPLETE} {
+ yylval.sval.ptr = "";
+ yylval.sval.length = 0;
+ return DOT_COMPLETE;
+ }
+
+{ID}({WHITE}*"."{WHITE}*({ID}|\"{OPER}\"))*(" "*"'"|{COMPLETE})? {
int all_posn = find_dot_all (yytext);
if (all_posn == -1 && yytext[yyleng-1] == '\'')
}
else if (all_posn >= 0)
yyless (all_posn);
+ bool is_completion = yytext[yyleng - 1] == COMPLETE_CHAR;
yylval.sval = processId (yytext, yyleng);
- return NAME;
+ return is_completion ? NAME_COMPLETE : NAME;
}
"::" { return COLONCOLON; }
-[{}@] { return yytext[0]; }
-
/* REGISTERS AND GDB CONVENIENCE VARIABLES */
"$"({LETTER}|{DIG}|"$")* {
yylval.sval.ptr = yytext;
yylval.sval.length = yyleng;
- return SPECIAL_VARIABLE;
+ return DOLLAR_VARIABLE;
}
/* CATCH-ALL ERROR CASE */
%%
#include <ctype.h>
-#include <string.h>
-
/* Initialize the lexer for processing new expression. */
static void
lexer_init (FILE *inp)
{
BEGIN INITIAL;
+ paren_depth = 0;
+ returned_complete = false;
yyrestart (inp);
}
/* 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
+ an error if the number is improperly formatted. 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)
+processInt (struct parser_state *par_state, const char *base0,
+ const char *num0, const char *exp0)
{
- ULONGEST result;
long exp;
int base;
- const char *trailer;
+ /* For the based literal with an "f" prefix, we'll return a
+ floating-point number. This counts the the number of "l"s seen,
+ to decide the width of the floating-point number to return. -1
+ means no "f". */
+ int floating_point_l_count = -1;
if (base0 == NULL)
base = 10;
else
{
- base = strtol (base0, (char **) NULL, 10);
+ char *end_of_base;
+ base = strtol (base0, &end_of_base, 10);
if (base < 2 || base > 16)
error (_("Invalid base: %d."), base);
+ while (*end_of_base == 'l')
+ {
+ ++floating_point_l_count;
+ ++end_of_base;
+ }
+ /* This assertion is ensured by the pattern. */
+ gdb_assert (floating_point_l_count == -1 || *end_of_base == 'f');
+ if (*end_of_base == 'f')
+ {
+ ++end_of_base;
+ ++floating_point_l_count;
+ }
+ /* This assertion is ensured by the pattern. */
+ gdb_assert (*end_of_base == '#');
}
if (exp0 == NULL)
else
exp = strtol(exp0, (char **) NULL, 10);
- errno = 0;
- result = strtoulst (num0, &trailer, base);
- if (errno == ERANGE)
- error (_("Integer literal out of range"));
- if (isxdigit(*trailer))
- error (_("Invalid digit `%c' in based literal"), *trailer);
+ gdb_mpz result;
+ while (isxdigit (*num0))
+ {
+ int dig = fromhex (*num0);
+ if (dig >= base)
+ error (_("Invalid digit `%c' in based literal"), *num0);
+ result *= base;
+ result += dig;
+ ++num0;
+ }
while (exp > 0)
{
- if (result > (ULONG_MAX / base))
- error (_("Integer literal out of range"));
result *= base;
exp -= 1;
}
- if ((result >> (gdbarch_int_bit (parse_gdbarch)-1)) == 0)
- yylval.typed_val.type = type_int ();
- else if ((result >> (gdbarch_long_bit (parse_gdbarch)-1)) == 0)
- yylval.typed_val.type = type_long ();
- else if (((result >> (gdbarch_long_bit (parse_gdbarch)-1)) >> 1) == 0)
+ if (floating_point_l_count > -1)
{
- /* 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 (parse_gdbarch)->builtin_unsigned_long;
- if (result & LONGEST_SIGN)
- yylval.typed_val.val =
- (LONGEST) (result & ~LONGEST_SIGN)
- - (LONGEST_SIGN>>1) - (LONGEST_SIGN>>1);
+ struct type *fp_type;
+ if (floating_point_l_count == 0)
+ fp_type = language_lookup_primitive_type (par_state->language (),
+ par_state->gdbarch (),
+ "float");
+ else if (floating_point_l_count == 1)
+ fp_type = language_lookup_primitive_type (par_state->language (),
+ par_state->gdbarch (),
+ "long_float");
else
- yylval.typed_val.val = (LONGEST) result;
- return INT;
+ {
+ /* This assertion is ensured by the pattern. */
+ gdb_assert (floating_point_l_count == 2);
+ fp_type = language_lookup_primitive_type (par_state->language (),
+ par_state->gdbarch (),
+ "long_long_float");
+ }
+
+ yylval.typed_val_float.type = fp_type;
+ result.write (gdb::make_array_view (yylval.typed_val_float.val,
+ fp_type->length ()),
+ type_byte_order (fp_type),
+ true);
+
+ return FLOAT;
}
+
+ int_storage.emplace_back (new gdb_mpz (std::move (result)));
+ const gdb_mpz *value = int_storage.back ().get ();
+
+ int int_bits = gdbarch_int_bit (par_state->gdbarch ());
+ int long_bits = gdbarch_long_bit (par_state->gdbarch ());
+ int long_long_bits = gdbarch_long_long_bit (par_state->gdbarch ());
+
+ if (fits_in_type (1, *value, int_bits, true))
+ yylval.typed_val.type = parse_type (par_state)->builtin_int;
+ else if (fits_in_type (1, *value, long_bits, true))
+ yylval.typed_val.type = parse_type (par_state)->builtin_long;
+ else if (fits_in_type (1, *value, long_bits, false))
+ yylval.typed_val.type
+ = builtin_type (par_state->gdbarch ())->builtin_unsigned_long;
+ else if (fits_in_type (1, *value, long_long_bits, true))
+ yylval.typed_val.type = parse_type (par_state)->builtin_long_long;
+ else if (fits_in_type (1, *value, long_long_bits, false))
+ yylval.typed_val.type
+ = builtin_type (par_state->gdbarch ())->builtin_unsigned_long_long;
+ else if (fits_in_type (1, *value, 128, true))
+ yylval.typed_val.type
+ = language_lookup_primitive_type (par_state->language (),
+ par_state->gdbarch (),
+ "long_long_long_integer");
+ else if (fits_in_type (1, *value, 128, false))
+ yylval.typed_val.type
+ = language_lookup_primitive_type (par_state->language (),
+ par_state->gdbarch (),
+ "unsigned_long_long_long_integer");
else
- yylval.typed_val.type = type_long_long ();
+ error (_("Integer literal out of range"));
- yylval.typed_val.val = (LONGEST) result;
+ yylval.typed_val.val = value;
return INT;
}
static int
-processReal (const char *num0)
+processReal (struct parser_state *par_state, const char *num0)
{
- sscanf (num0, "%" DOUBLEST_SCAN_FORMAT, &yylval.typed_val_float.dval);
-
- yylval.typed_val_float.type = type_float ();
- if (sizeof(DOUBLEST) >= gdbarch_double_bit (parse_gdbarch)
- / TARGET_CHAR_BIT)
- yylval.typed_val_float.type = type_double ();
- if (sizeof(DOUBLEST) >= gdbarch_long_double_bit (parse_gdbarch)
- / TARGET_CHAR_BIT)
- yylval.typed_val_float.type = type_long_double ();
+ yylval.typed_val_float.type = parse_type (par_state)->builtin_long_double;
+ bool parsed = parse_float (num0, strlen (num0),
+ yylval.typed_val_float.type,
+ yylval.typed_val_float.val);
+ 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
+ encoded and the resulting name is equal to it. Similarly, if the name
+ starts with '<', it is copied verbatim. 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).
+ + Characters between '...' are transfered verbatim to yylval.ssym.
+ + 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
static struct stoken
processId (const char *name0, int len)
{
- char *name = obstack_alloc (&temp_parse_space, len + 11);
+ char *name = (char *) obstack_alloc (&temp_parse_space, len + 11);
int i0, i;
struct stoken result;
while (len > 0 && isspace (name0[len-1]))
len -= 1;
- if (strstr (name0, "___") != NULL)
+ if (name0[0] == '<' || strstr (name0, "___") != NULL)
{
strncpy (name, name0, len);
name[len] = '\000';
return result;
}
+ bool in_quotes = false;
i = i0 = 0;
while (i0 < len)
{
- if (isalnum (name0[i0]))
+ if (name0[i0] == COMPLETE_CHAR)
+ {
+ /* Just ignore. */
+ ++i0;
+ }
+ else if (in_quotes)
+ name[i++] = name0[i0++];
+ else if (isalnum (name0[i0]))
{
name[i] = tolower (name0[i0]);
i += 1; i0 += 1;
}
- else switch (name0[i0])
+ else if (isspace (name0[i0]))
+ i0 += 1;
+ else if (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;
+ /* Copy the starting quote, but not the ending quote. */
+ if (!in_quotes)
+ name[i++] = name0[i0++];
+ in_quotes = !in_quotes;
}
+ else
+ name[i++] = name0[i0++];
}
name[i] = '\000';
const char *lim = text + len;
struct stoken result;
- q = obstack_alloc (&temp_parse_space, len);
+ q = (char *) obstack_alloc (&temp_parse_space, len);
result.ptr = q;
p = text;
while (p < lim)
}
else
{
- int chr;
- sscanf (p+2, "%2x", &chr);
+ const char *end;
+ ULONGEST chr = strtoulst (p + 2, &end, 16);
+ if (chr > 0xff)
+ error (_("wide strings are not yet supported"));
*q = (char) chr;
- p += 5;
+ p = end + 1;
}
}
else
{ "size", TICK_SIZE },
{ "tag", TICK_TAG },
{ "val", TICK_VAL },
- { NULL, -1 }
};
/* Return the syntactic code corresponding to the attribute name or
static int
processAttribute (const char *str)
{
- int i, k;
+ gdb_assert (*str == '\'');
+ ++str;
+ while (isspace (*str))
+ ++str;
+
+ int len = strlen (str);
+ if (len > 0 && str[len - 1] == COMPLETE_CHAR)
+ {
+ /* This is enforced by YY_INPUT. */
+ gdb_assert (pstate->parse_completion);
+ yylval.sval.ptr = obstack_strndup (&temp_parse_space, str, len - 1);
+ yylval.sval.length = len - 1;
+ return TICK_COMPLETE;
+ }
- for (i = 0; attributes[i].code != -1; i += 1)
- if (strcasecmp (str, attributes[i].name) == 0)
- return attributes[i].code;
+ for (const auto &item : attributes)
+ if (strcasecmp (str, item.name) == 0)
+ return item.code;
- for (i = 0, k = -1; attributes[i].code != -1; i += 1)
- if (subseqMatch (str, attributes[i].name))
+ gdb::optional<int> found;
+ for (const auto &item : attributes)
+ if (subseqMatch (str, item.name))
{
- if (k == -1)
- k = i;
+ if (!found.has_value ())
+ found = item.code;
else
error (_("ambiguous attribute name: `%s'"), str);
}
- if (k == -1)
+ if (!found.has_value ())
error (_("unrecognized attribute: `%s'"), str);
- return attributes[k].code;
+ return *found;
+}
+
+bool
+ada_tick_completer::complete (struct expression *exp,
+ completion_tracker &tracker)
+{
+ completion_list output;
+ for (const auto &item : attributes)
+ {
+ if (strncasecmp (item.name, m_name.c_str (), m_name.length ()) == 0)
+ output.emplace_back (xstrdup (item.name));
+ }
+ tracker.add_completions (std::move (output));
+ return true;
}
/* Back up lexptr by yyleng and then to the rightmost occurrence of
static void
rewind_to_char (int ch)
{
- lexptr -= yyleng;
- while (toupper (*lexptr) != toupper (ch))
- lexptr -= 1;
+ pstate->lexptr -= yyleng;
+ while (toupper (*pstate->lexptr) != toupper (ch))
+ pstate->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
projects / binutils-gdb.git / blobdiff