f86f5ca3f5
* p-lang.c: Eliminate "register". * c-lang.c: Ditto. * expprint.c: Ditto. * f-lang.c: Ditto. * jv-lang.c: Ditto. * language.c: Ditto. * m2-lang.c: Ditto. * parse.c: Ditto. * scm-lang.c: Ditto. * objc-lang.c: Ditto.
484 lines
15 KiB
C
484 lines
15 KiB
C
/* Pascal language support routines for GDB, the GNU debugger.
|
||
Copyright 2000, 2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
/* This file is derived from c-lang.c */
|
||
|
||
#include "defs.h"
|
||
#include "gdb_string.h"
|
||
#include "symtab.h"
|
||
#include "gdbtypes.h"
|
||
#include "expression.h"
|
||
#include "parser-defs.h"
|
||
#include "language.h"
|
||
#include "p-lang.h"
|
||
#include "valprint.h"
|
||
#include "value.h"
|
||
#include <ctype.h>
|
||
|
||
extern void _initialize_pascal_language (void);
|
||
|
||
|
||
/* Determines if type TYPE is a pascal string type.
|
||
Returns 1 if the type is a known pascal type
|
||
This function is used by p-valprint.c code to allow better string display.
|
||
If it is a pascal string type, then it also sets info needed
|
||
to get the length and the data of the string
|
||
length_pos, length_size and string_pos are given in bytes.
|
||
char_size gives the element size in bytes.
|
||
FIXME: if the position or the size of these fields
|
||
are not multiple of TARGET_CHAR_BIT then the results are wrong
|
||
but this does not happen for Free Pascal nor for GPC. */
|
||
int
|
||
is_pascal_string_type (struct type *type,int *length_pos,
|
||
int *length_size, int *string_pos, int *char_size,
|
||
char **arrayname)
|
||
{
|
||
if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
|
||
{
|
||
/* Old Borland type pascal strings from Free Pascal Compiler. */
|
||
/* Two fields: length and st. */
|
||
if (TYPE_NFIELDS (type) == 2
|
||
&& strcmp (TYPE_FIELDS (type)[0].name, "length") == 0
|
||
&& strcmp (TYPE_FIELDS (type)[1].name, "st") == 0)
|
||
{
|
||
if (length_pos)
|
||
*length_pos = TYPE_FIELD_BITPOS (type, 0) / TARGET_CHAR_BIT;
|
||
if (length_size)
|
||
*length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 0));
|
||
if (string_pos)
|
||
*string_pos = TYPE_FIELD_BITPOS (type, 1) / TARGET_CHAR_BIT;
|
||
if (char_size)
|
||
*char_size = 1;
|
||
if (arrayname)
|
||
*arrayname = TYPE_FIELDS (type)[1].name;
|
||
return 2;
|
||
};
|
||
/* GNU pascal strings. */
|
||
/* Three fields: Capacity, length and schema$ or _p_schema. */
|
||
if (TYPE_NFIELDS (type) == 3
|
||
&& strcmp (TYPE_FIELDS (type)[0].name, "Capacity") == 0
|
||
&& strcmp (TYPE_FIELDS (type)[1].name, "length") == 0)
|
||
{
|
||
if (length_pos)
|
||
*length_pos = TYPE_FIELD_BITPOS (type, 1) / TARGET_CHAR_BIT;
|
||
if (length_size)
|
||
*length_size = TYPE_LENGTH (TYPE_FIELD_TYPE (type, 1));
|
||
if (string_pos)
|
||
*string_pos = TYPE_FIELD_BITPOS (type, 2) / TARGET_CHAR_BIT;
|
||
/* FIXME: how can I detect wide chars in GPC ?? */
|
||
if (char_size)
|
||
*char_size = 1;
|
||
if (arrayname)
|
||
*arrayname = TYPE_FIELDS (type)[2].name;
|
||
return 3;
|
||
};
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static void pascal_one_char (int, struct ui_file *, int *);
|
||
|
||
/* Print the character C on STREAM as part of the contents of a literal
|
||
string.
|
||
In_quotes is reset to 0 if a char is written with #4 notation */
|
||
|
||
static void
|
||
pascal_one_char (int c, struct ui_file *stream, int *in_quotes)
|
||
{
|
||
|
||
c &= 0xFF; /* Avoid sign bit follies */
|
||
|
||
if ((c == '\'') || (PRINT_LITERAL_FORM (c)))
|
||
{
|
||
if (!(*in_quotes))
|
||
fputs_filtered ("'", stream);
|
||
*in_quotes = 1;
|
||
if (c == '\'')
|
||
{
|
||
fputs_filtered ("''", stream);
|
||
}
|
||
else
|
||
fprintf_filtered (stream, "%c", c);
|
||
}
|
||
else
|
||
{
|
||
if (*in_quotes)
|
||
fputs_filtered ("'", stream);
|
||
*in_quotes = 0;
|
||
fprintf_filtered (stream, "#%d", (unsigned int) c);
|
||
}
|
||
}
|
||
|
||
static void pascal_emit_char (int c, struct ui_file *stream, int quoter);
|
||
|
||
/* Print the character C on STREAM as part of the contents of a literal
|
||
string whose delimiter is QUOTER. Note that that format for printing
|
||
characters and strings is language specific. */
|
||
|
||
static void
|
||
pascal_emit_char (int c, struct ui_file *stream, int quoter)
|
||
{
|
||
int in_quotes = 0;
|
||
pascal_one_char (c, stream, &in_quotes);
|
||
if (in_quotes)
|
||
fputs_filtered ("'", stream);
|
||
}
|
||
|
||
void
|
||
pascal_printchar (int c, struct ui_file *stream)
|
||
{
|
||
int in_quotes = 0;
|
||
pascal_one_char (c, stream, &in_quotes);
|
||
if (in_quotes)
|
||
fputs_filtered ("'", stream);
|
||
}
|
||
|
||
/* Print the character string STRING, printing at most LENGTH characters.
|
||
Printing stops early if the number hits print_max; repeat counts
|
||
are printed as appropriate. Print ellipses at the end if we
|
||
had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. */
|
||
|
||
void
|
||
pascal_printstr (struct ui_file *stream, char *string, unsigned int length,
|
||
int width, int force_ellipses)
|
||
{
|
||
unsigned int i;
|
||
unsigned int things_printed = 0;
|
||
int in_quotes = 0;
|
||
int need_comma = 0;
|
||
|
||
/* If the string was not truncated due to `set print elements', and
|
||
the last byte of it is a null, we don't print that, in traditional C
|
||
style. */
|
||
if ((!force_ellipses) && length > 0 && string[length - 1] == '\0')
|
||
length--;
|
||
|
||
if (length == 0)
|
||
{
|
||
fputs_filtered ("''", stream);
|
||
return;
|
||
}
|
||
|
||
for (i = 0; i < length && things_printed < print_max; ++i)
|
||
{
|
||
/* Position of the character we are examining
|
||
to see whether it is repeated. */
|
||
unsigned int rep1;
|
||
/* Number of repetitions we have detected so far. */
|
||
unsigned int reps;
|
||
|
||
QUIT;
|
||
|
||
if (need_comma)
|
||
{
|
||
fputs_filtered (", ", stream);
|
||
need_comma = 0;
|
||
}
|
||
|
||
rep1 = i + 1;
|
||
reps = 1;
|
||
while (rep1 < length && string[rep1] == string[i])
|
||
{
|
||
++rep1;
|
||
++reps;
|
||
}
|
||
|
||
if (reps > repeat_count_threshold)
|
||
{
|
||
if (in_quotes)
|
||
{
|
||
if (inspect_it)
|
||
fputs_filtered ("\\', ", stream);
|
||
else
|
||
fputs_filtered ("', ", stream);
|
||
in_quotes = 0;
|
||
}
|
||
pascal_printchar (string[i], stream);
|
||
fprintf_filtered (stream, " <repeats %u times>", reps);
|
||
i = rep1 - 1;
|
||
things_printed += repeat_count_threshold;
|
||
need_comma = 1;
|
||
}
|
||
else
|
||
{
|
||
int c = string[i];
|
||
if ((!in_quotes) && (PRINT_LITERAL_FORM (c)))
|
||
{
|
||
if (inspect_it)
|
||
fputs_filtered ("\\'", stream);
|
||
else
|
||
fputs_filtered ("'", stream);
|
||
in_quotes = 1;
|
||
}
|
||
pascal_one_char (c, stream, &in_quotes);
|
||
++things_printed;
|
||
}
|
||
}
|
||
|
||
/* Terminate the quotes if necessary. */
|
||
if (in_quotes)
|
||
{
|
||
if (inspect_it)
|
||
fputs_filtered ("\\'", stream);
|
||
else
|
||
fputs_filtered ("'", stream);
|
||
}
|
||
|
||
if (force_ellipses || i < length)
|
||
fputs_filtered ("...", stream);
|
||
}
|
||
|
||
/* Create a fundamental Pascal type using default reasonable for the current
|
||
target machine.
|
||
|
||
Some object/debugging file formats (DWARF version 1, COFF, etc) do not
|
||
define fundamental types such as "int" or "double". Others (stabs or
|
||
DWARF version 2, etc) do define fundamental types. For the formats which
|
||
don't provide fundamental types, gdb can create such types using this
|
||
function.
|
||
|
||
FIXME: Some compilers distinguish explicitly signed integral types
|
||
(signed short, signed int, signed long) from "regular" integral types
|
||
(short, int, long) in the debugging information. There is some dis-
|
||
agreement as to how useful this feature is. In particular, gcc does
|
||
not support this. Also, only some debugging formats allow the
|
||
distinction to be passed on to a debugger. For now, we always just
|
||
use "short", "int", or "long" as the type name, for both the implicit
|
||
and explicitly signed types. This also makes life easier for the
|
||
gdb test suite since we don't have to account for the differences
|
||
in output depending upon what the compiler and debugging format
|
||
support. We will probably have to re-examine the issue when gdb
|
||
starts taking it's fundamental type information directly from the
|
||
debugging information supplied by the compiler. fnf@cygnus.com */
|
||
|
||
/* Note there might be some discussion about the choosen correspondance
|
||
because it mainly reflects Free Pascal Compiler setup for now PM */
|
||
|
||
|
||
struct type *
|
||
pascal_create_fundamental_type (struct objfile *objfile, int typeid)
|
||
{
|
||
struct type *type = NULL;
|
||
|
||
switch (typeid)
|
||
{
|
||
default:
|
||
/* FIXME: For now, if we are asked to produce a type not in this
|
||
language, create the equivalent of a C integer type with the
|
||
name "<?type?>". When all the dust settles from the type
|
||
reconstruction work, this should probably become an error. */
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
||
0, "<?type?>", objfile);
|
||
warning ("internal error: no Pascal fundamental type %d", typeid);
|
||
break;
|
||
case FT_VOID:
|
||
type = init_type (TYPE_CODE_VOID,
|
||
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
||
0, "void", objfile);
|
||
break;
|
||
case FT_CHAR:
|
||
type = init_type (TYPE_CODE_CHAR,
|
||
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
||
0, "char", objfile);
|
||
break;
|
||
case FT_SIGNED_CHAR:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
||
0, "shortint", objfile);
|
||
break;
|
||
case FT_UNSIGNED_CHAR:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED, "byte", objfile);
|
||
break;
|
||
case FT_SHORT:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
||
0, "integer", objfile);
|
||
break;
|
||
case FT_SIGNED_SHORT:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
||
0, "integer", objfile); /* FIXME-fnf */
|
||
break;
|
||
case FT_UNSIGNED_SHORT:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED, "word", objfile);
|
||
break;
|
||
case FT_INTEGER:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
||
0, "longint", objfile);
|
||
break;
|
||
case FT_SIGNED_INTEGER:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
||
0, "longint", objfile); /* FIXME -fnf */
|
||
break;
|
||
case FT_UNSIGNED_INTEGER:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_INT_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED, "cardinal", objfile);
|
||
break;
|
||
case FT_LONG:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
||
0, "long", objfile);
|
||
break;
|
||
case FT_SIGNED_LONG:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
||
0, "long", objfile); /* FIXME -fnf */
|
||
break;
|
||
case FT_UNSIGNED_LONG:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_LONG_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
|
||
break;
|
||
case FT_LONG_LONG:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
||
0, "long long", objfile);
|
||
break;
|
||
case FT_SIGNED_LONG_LONG:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
||
0, "signed long long", objfile);
|
||
break;
|
||
case FT_UNSIGNED_LONG_LONG:
|
||
type = init_type (TYPE_CODE_INT,
|
||
TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
|
||
TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
|
||
break;
|
||
case FT_FLOAT:
|
||
type = init_type (TYPE_CODE_FLT,
|
||
TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
|
||
0, "float", objfile);
|
||
break;
|
||
case FT_DBL_PREC_FLOAT:
|
||
type = init_type (TYPE_CODE_FLT,
|
||
TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
|
||
0, "double", objfile);
|
||
break;
|
||
case FT_EXT_PREC_FLOAT:
|
||
type = init_type (TYPE_CODE_FLT,
|
||
TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
|
||
0, "extended", objfile);
|
||
break;
|
||
}
|
||
return (type);
|
||
}
|
||
|
||
|
||
/* Table mapping opcodes into strings for printing operators
|
||
and precedences of the operators. */
|
||
|
||
const struct op_print pascal_op_print_tab[] =
|
||
{
|
||
{",", BINOP_COMMA, PREC_COMMA, 0},
|
||
{":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
|
||
{"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
|
||
{"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
|
||
{"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
|
||
{"=", BINOP_EQUAL, PREC_EQUAL, 0},
|
||
{"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0},
|
||
{"<=", BINOP_LEQ, PREC_ORDER, 0},
|
||
{">=", BINOP_GEQ, PREC_ORDER, 0},
|
||
{">", BINOP_GTR, PREC_ORDER, 0},
|
||
{"<", BINOP_LESS, PREC_ORDER, 0},
|
||
{"shr", BINOP_RSH, PREC_SHIFT, 0},
|
||
{"shl", BINOP_LSH, PREC_SHIFT, 0},
|
||
{"+", BINOP_ADD, PREC_ADD, 0},
|
||
{"-", BINOP_SUB, PREC_ADD, 0},
|
||
{"*", BINOP_MUL, PREC_MUL, 0},
|
||
{"/", BINOP_DIV, PREC_MUL, 0},
|
||
{"div", BINOP_INTDIV, PREC_MUL, 0},
|
||
{"mod", BINOP_REM, PREC_MUL, 0},
|
||
{"@", BINOP_REPEAT, PREC_REPEAT, 0},
|
||
{"-", UNOP_NEG, PREC_PREFIX, 0},
|
||
{"not", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
|
||
{"^", UNOP_IND, PREC_SUFFIX, 1},
|
||
{"@", UNOP_ADDR, PREC_PREFIX, 0},
|
||
{"sizeof", UNOP_SIZEOF, PREC_PREFIX, 0},
|
||
{NULL, 0, 0, 0}
|
||
};
|
||
|
||
struct type **const (pascal_builtin_types[]) =
|
||
{
|
||
&builtin_type_int,
|
||
&builtin_type_long,
|
||
&builtin_type_short,
|
||
&builtin_type_char,
|
||
&builtin_type_float,
|
||
&builtin_type_double,
|
||
&builtin_type_void,
|
||
&builtin_type_long_long,
|
||
&builtin_type_signed_char,
|
||
&builtin_type_unsigned_char,
|
||
&builtin_type_unsigned_short,
|
||
&builtin_type_unsigned_int,
|
||
&builtin_type_unsigned_long,
|
||
&builtin_type_unsigned_long_long,
|
||
&builtin_type_long_double,
|
||
&builtin_type_complex,
|
||
&builtin_type_double_complex,
|
||
0
|
||
};
|
||
|
||
const struct language_defn pascal_language_defn =
|
||
{
|
||
"pascal", /* Language name */
|
||
language_pascal,
|
||
pascal_builtin_types,
|
||
range_check_on,
|
||
type_check_on,
|
||
case_sensitive_on,
|
||
pascal_parse,
|
||
pascal_error,
|
||
evaluate_subexp_standard,
|
||
pascal_printchar, /* Print a character constant */
|
||
pascal_printstr, /* Function to print string constant */
|
||
pascal_emit_char, /* Print a single char */
|
||
pascal_create_fundamental_type, /* Create fundamental type in this language */
|
||
pascal_print_type, /* Print a type using appropriate syntax */
|
||
pascal_val_print, /* Print a value using appropriate syntax */
|
||
pascal_value_print, /* Print a top-level value */
|
||
NULL, /* Language specific skip_trampoline */
|
||
value_of_this, /* value_of_this */
|
||
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
|
||
NULL, /* Language specific symbol demangler */
|
||
{"", "%", "b", ""}, /* Binary format info */
|
||
{"0%lo", "0", "o", ""}, /* Octal format info */
|
||
{"%ld", "", "d", ""}, /* Decimal format info */
|
||
{"$%lx", "$", "x", ""}, /* Hex format info */
|
||
pascal_op_print_tab, /* expression operators for printing */
|
||
1, /* c-style arrays */
|
||
0, /* String lower bound */
|
||
&builtin_type_char, /* Type of string elements */
|
||
LANG_MAGIC
|
||
};
|
||
|
||
void
|
||
_initialize_pascal_language (void)
|
||
{
|
||
add_language (&pascal_language_defn);
|
||
}
|