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22e3975901
binutils-gdb/gdb/c-lang.c
Fred Fish 22e3975901 * c-exp.y, m2-exp.y: Migrate code that has nothing to do with 
expression parsing into c-lang.c and m2-lang.c respectively.
	* c-lang.c, m2-lang.c:  New files, code migrated from c-exp.y and
	m2-exp.y respectively.
	* c-lang.h, m2-lang.h:  New files, internal interfaces between c-*
	and m2-* files respectively.
	* Makefile.in (SFILES_MAINDIR):  Add c-lang.c, m2-lang.c.
	* Makefile.in (HFILES):  Add c-lang.h, m2-lang.h.
	* Makefile.in (OBS):  Add c-lang.o, m2-lang.o.
	* expression.h (struct block):  Forward declaration for prototypes.
	* language.h (struct objfile):  Forward declaration for prototypes.
	**** start-sanitize-chill ****
	* Makefile.in (SFILES_MAINDIR):  Add ch-lang.c.
	* Makefile.in (HFILES):  Add ch-lang.h.
	* Makefile.in (OBS):  Add ch-lang.o.
	* ch-exp.y:  Migrate code that has nothing to do with expression
	parsing into ch-lang.c.
	* ch-lang.c:  New file, code migrated from c-exp.y.
	* ch-lang.h:  New file, internal interface between ch-* files.
	**** end-sanitize-chill ****
1992-12-09 06:50:30 +00:00

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/* C language support routines for GDB, the GNU debugger.
Copyright 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "defs.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "parser-defs.h"
#include "language.h"
#include "c-lang.h"
/* 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
emit_char (c, stream, quoter)
register int c;
FILE *stream;
int quoter;
{
c &= 0xFF; /* Avoid sign bit follies */
if (PRINT_LITERAL_FORM (c))
{
if (c == '\\' || c == quoter)
{
fputs_filtered ("\\", stream);
}
fprintf_filtered (stream, "%c", c);
}
else
{
switch (c)
{
case '\n':
fputs_filtered ("\\n", stream);
break;
case '\b':
fputs_filtered ("\\b", stream);
break;
case '\t':
fputs_filtered ("\\t", stream);
break;
case '\f':
fputs_filtered ("\\f", stream);
break;
case '\r':
fputs_filtered ("\\r", stream);
break;
case '\033':
fputs_filtered ("\\e", stream);
break;
case '\007':
fputs_filtered ("\\a", stream);
break;
default:
fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
break;
}
}
}
static void
c_printchar (c, stream)
int c;
FILE *stream;
{
fputs_filtered ("'", stream);
emit_char (c, stream, '\'');
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. */
static void
c_printstr (stream, string, length, force_ellipses)
FILE *stream;
char *string;
unsigned int length;
int force_ellipses;
{
register unsigned int i;
unsigned int things_printed = 0;
int in_quotes = 0;
int need_comma = 0;
extern int inspect_it;
extern int repeat_count_threshold;
extern int print_max;
if (length == 0)
{
fputs_filtered ("\"\"", stdout);
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;
}
c_printchar (string[i], stream);
fprintf_filtered (stream, " <repeats %u times>", reps);
i = rep1 - 1;
things_printed += repeat_count_threshold;
need_comma = 1;
}
else
{
if (!in_quotes)
{
if (inspect_it)
fputs_filtered ("\\\"", stream);
else
fputs_filtered ("\"", stream);
in_quotes = 1;
}
emit_char (string[i], stream, '"');
++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 C 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 */
static struct type *
c_create_fundamental_type (objfile, typeid)
struct objfile *objfile;
int typeid;
{
register struct type *type = NULL;
register int nbytes;
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 C/C++ 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_INT,
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,
TYPE_FLAG_SIGNED, "signed char", objfile);
break;
case FT_UNSIGNED_CHAR:
type = init_type (TYPE_CODE_INT,
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
break;
case FT_SHORT:
type = init_type (TYPE_CODE_INT,
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
0, "short", objfile);
break;
case FT_SIGNED_SHORT:
type = init_type (TYPE_CODE_INT,
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_SIGNED, "short", objfile); /* FIXME-fnf */
break;
case FT_UNSIGNED_SHORT:
type = init_type (TYPE_CODE_INT,
TARGET_SHORT_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
break;
case FT_INTEGER:
type = init_type (TYPE_CODE_INT,
TARGET_INT_BIT / TARGET_CHAR_BIT,
0, "int", objfile);
break;
case FT_SIGNED_INTEGER:
type = init_type (TYPE_CODE_INT,
TARGET_INT_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_SIGNED, "int", objfile); /* FIXME -fnf */
break;
case FT_UNSIGNED_INTEGER:
type = init_type (TYPE_CODE_INT,
TARGET_INT_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED, "unsigned int", 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,
TYPE_FLAG_SIGNED, "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,
TYPE_FLAG_SIGNED, "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, "long double", objfile);
break;
}
return (type);
}
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
const static struct op_print c_op_print_tab[] =
{
{",", BINOP_COMMA, PREC_COMMA, 0},
{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
{"&", 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},
{">>", BINOP_RSH, PREC_SHIFT, 0},
{"<<", 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},
{"%", BINOP_REM, PREC_MUL, 0},
{"@", BINOP_REPEAT, PREC_REPEAT, 0},
{"-", UNOP_NEG, PREC_PREFIX, 0},
{"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
{"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
{"*", UNOP_IND, PREC_PREFIX, 0},
{"&", UNOP_ADDR, PREC_PREFIX, 0},
{"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
{"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
{"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
/* C++ */
{"::", BINOP_SCOPE, PREC_PREFIX, 0},
{NULL, 0, 0, 0}
};
/* These variables point to the objects
representing the predefined C data types. */
struct type *builtin_type_void;
struct type *builtin_type_char;
struct type *builtin_type_short;
struct type *builtin_type_int;
struct type *builtin_type_long;
struct type *builtin_type_long_long;
struct type *builtin_type_signed_char;
struct type *builtin_type_unsigned_char;
struct type *builtin_type_unsigned_short;
struct type *builtin_type_unsigned_int;
struct type *builtin_type_unsigned_long;
struct type *builtin_type_unsigned_long_long;
struct type *builtin_type_float;
struct type *builtin_type_double;
struct type *builtin_type_long_double;
struct type *builtin_type_complex;
struct type *builtin_type_double_complex;
struct type ** const (c_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 c_language_defn = {
"c", /* Language name */
language_c,
c_builtin_types,
range_check_off,
type_check_off,
c_parse,
c_error,
c_printchar, /* Print a character constant */
c_printstr, /* Function to print string constant */
c_create_fundamental_type, /* Create fundamental type in this language */
&BUILTIN_TYPE_LONGEST, /* longest signed integral type */
&BUILTIN_TYPE_UNSIGNED_LONGEST,/* longest unsigned integral type */
&builtin_type_double, /* longest floating point type */ /*FIXME*/
{"", "", "", ""}, /* Binary format info */
{"0%o", "0", "o", ""}, /* Octal format info */
{"%d", "", "d", ""}, /* Decimal format info */
{"0x%x", "0x", "x", ""}, /* Hex format info */
c_op_print_tab, /* expression operators for printing */
LANG_MAGIC
};
const struct language_defn cplus_language_defn = {
"c++", /* Language name */
language_cplus,
c_builtin_types,
range_check_off,
type_check_off,
c_parse,
c_error,
c_printchar, /* Print a character constant */
c_printstr, /* Function to print string constant */
c_create_fundamental_type, /* Create fundamental type in this language */
&BUILTIN_TYPE_LONGEST, /* longest signed integral type */
&BUILTIN_TYPE_UNSIGNED_LONGEST,/* longest unsigned integral type */
&builtin_type_double, /* longest floating point type */ /*FIXME*/
{"", "", "", ""}, /* Binary format info */
{"0%o", "0", "o", ""}, /* Octal format info */
{"%d", "", "d", ""}, /* Decimal format info */
{"0x%x", "0x", "x", ""}, /* Hex format info */
c_op_print_tab, /* expression operators for printing */
LANG_MAGIC
};
void
_initialize_c_exp ()
{
builtin_type_void =
init_type (TYPE_CODE_VOID, 1,
0,
"void", (struct objfile *) NULL);
builtin_type_char =
init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
0,
"char", (struct objfile *) NULL);
builtin_type_signed_char =
init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_SIGNED,
"signed char", (struct objfile *) NULL);
builtin_type_unsigned_char =
init_type (TYPE_CODE_INT, TARGET_CHAR_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED,
"unsigned char", (struct objfile *) NULL);
builtin_type_short =
init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
0,
"short", (struct objfile *) NULL);
builtin_type_unsigned_short =
init_type (TYPE_CODE_INT, TARGET_SHORT_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED,
"unsigned short", (struct objfile *) NULL);
builtin_type_int =
init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
0,
"int", (struct objfile *) NULL);
builtin_type_unsigned_int =
init_type (TYPE_CODE_INT, TARGET_INT_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED,
"unsigned int", (struct objfile *) NULL);
builtin_type_long =
init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT,
0,
"long", (struct objfile *) NULL);
builtin_type_unsigned_long =
init_type (TYPE_CODE_INT, TARGET_LONG_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED,
"unsigned long", (struct objfile *) NULL);
builtin_type_long_long =
init_type (TYPE_CODE_INT, TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
0,
"long long", (struct objfile *) NULL);
builtin_type_unsigned_long_long =
init_type (TYPE_CODE_INT, TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
TYPE_FLAG_UNSIGNED,
"unsigned long long", (struct objfile *) NULL);
builtin_type_float =
init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
0,
"float", (struct objfile *) NULL);
builtin_type_double =
init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
0,
"double", (struct objfile *) NULL);
builtin_type_long_double =
init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
0,
"long double", (struct objfile *) NULL);
builtin_type_complex =
init_type (TYPE_CODE_FLT, TARGET_COMPLEX_BIT / TARGET_CHAR_BIT,
0,
"complex", (struct objfile *) NULL);
builtin_type_double_complex =
init_type (TYPE_CODE_FLT, TARGET_DOUBLE_COMPLEX_BIT / TARGET_CHAR_BIT,
0,
"double complex", (struct objfile *) NULL);
add_language (&c_language_defn);
add_language (&cplus_language_defn);
}
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