/* C language support routines for GDB, the GNU debugger.
- Copyright 1992, 1993, 1994, 2000 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2002
+ Free Software Foundation, Inc.
This file is part of GDB.
#include "language.h"
#include "c-lang.h"
#include "valprint.h"
+#include "macroscope.h"
+#include "gdb_assert.h"
+#include "charset.h"
+#include "gdb_string.h"
extern void _initialize_c_language (void);
static void c_emit_char (int c, struct ui_file * stream, int quoter);
static void
c_emit_char (register int c, struct ui_file *stream, int quoter)
{
+ const char *escape;
+ int host_char;
+
c &= 0xFF; /* Avoid sign bit follies */
- if (PRINT_LITERAL_FORM (c))
+ escape = c_target_char_has_backslash_escape (c);
+ if (escape)
{
- if (c == '\\' || c == quoter)
- {
- fputs_filtered ("\\", stream);
- }
- fprintf_filtered (stream, "%c", c);
+ if (quoter == '"' && strcmp (escape, "0") == 0)
+ /* Print nulls embedded in double quoted strings as \000 to
+ prevent ambiguity. */
+ fprintf_filtered (stream, "\\000");
+ else
+ fprintf_filtered (stream, "\\%s", escape);
}
- else
+ else if (target_char_to_host (c, &host_char)
+ && host_char_print_literally (host_char))
{
- 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;
- }
+ if (host_char == '\\' || host_char == quoter)
+ fputs_filtered ("\\", stream);
+ fprintf_filtered (stream, "%c", host_char);
}
+ else
+ fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
}
void
style. */
if (!force_ellipses
&& length > 0
- && extract_unsigned_integer (string + (length - 1) * width, width) == '\0')
+ && (extract_unsigned_integer (string + (length - 1) * width, width)
+ == '\0'))
length--;
if (length == 0)
type = init_type (TYPE_CODE_BOOL,
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
0, "bool", objfile);
-
break;
case FT_CHAR:
type = init_type (TYPE_CODE_INT,
TARGET_CHAR_BIT / TARGET_CHAR_BIT,
- 0, "char", objfile);
- TYPE_FLAGS (type) |= TYPE_FLAG_NOSIGN;
+ TYPE_FLAG_NOSIGN, "char", objfile);
break;
case FT_SIGNED_CHAR:
type = init_type (TYPE_CODE_INT,
TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
0, "long double", objfile);
break;
+ case FT_COMPLEX:
+ type = init_type (TYPE_CODE_FLT,
+ 2 * TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
+ 0, "complex float", objfile);
+ TYPE_TARGET_TYPE (type)
+ = init_type (TYPE_CODE_FLT, TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
+ 0, "float", objfile);
+ break;
+ case FT_DBL_PREC_COMPLEX:
+ type = init_type (TYPE_CODE_FLT,
+ 2 * TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+ 0, "complex double", objfile);
+ TYPE_TARGET_TYPE (type)
+ = init_type (TYPE_CODE_FLT, TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+ 0, "double", objfile);
+ break;
+ case FT_EXT_PREC_COMPLEX:
+ type = init_type (TYPE_CODE_FLT,
+ 2 * TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
+ 0, "complex long double", objfile);
+ TYPE_TARGET_TYPE (type)
+ = init_type (TYPE_CODE_FLT, TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
+ 0, "long double", objfile);
+ break;
case FT_TEMPLATE_ARG:
type = init_type (TYPE_CODE_TEMPLATE_ARG,
0,
0, "<template arg>", objfile);
-
break;
}
return (type);
}
\f
+/* Preprocessing and parsing C and C++ expressions. */
+
+
+/* When we find that lexptr (the global var defined in parse.c) is
+ pointing at a macro invocation, we expand the invocation, and call
+ scan_macro_expansion to save the old lexptr here and point lexptr
+ into the expanded text. When we reach the end of that, we call
+ end_macro_expansion to pop back to the value we saved here. The
+ macro expansion code promises to return only fully-expanded text,
+ so we don't need to "push" more than one level.
+
+ This is disgusting, of course. It would be cleaner to do all macro
+ expansion beforehand, and then hand that to lexptr. But we don't
+ really know where the expression ends. Remember, in a command like
+
+ (gdb) break *ADDRESS if CONDITION
+
+ we evaluate ADDRESS in the scope of the current frame, but we
+ evaluate CONDITION in the scope of the breakpoint's location. So
+ it's simply wrong to try to macro-expand the whole thing at once. */
+static char *macro_original_text;
+static char *macro_expanded_text;
+
+
+void
+scan_macro_expansion (char *expansion)
+{
+ /* We'd better not be trying to push the stack twice. */
+ gdb_assert (! macro_original_text);
+ gdb_assert (! macro_expanded_text);
+
+ /* Save the old lexptr value, so we can return to it when we're done
+ parsing the expanded text. */
+ macro_original_text = lexptr;
+ lexptr = expansion;
+
+ /* Save the expanded text, so we can free it when we're finished. */
+ macro_expanded_text = expansion;
+}
+
+
+int
+scanning_macro_expansion (void)
+{
+ return macro_original_text != 0;
+}
+
+void
+finished_macro_expansion (void)
+{
+ /* There'd better be something to pop back to, and we better have
+ saved a pointer to the start of the expanded text. */
+ gdb_assert (macro_original_text);
+ gdb_assert (macro_expanded_text);
+
+ /* Pop back to the original text. */
+ lexptr = macro_original_text;
+ macro_original_text = 0;
+
+ /* Free the expanded text. */
+ xfree (macro_expanded_text);
+ macro_expanded_text = 0;
+}
+
+
+static void
+scan_macro_cleanup (void *dummy)
+{
+ if (macro_original_text)
+ finished_macro_expansion ();
+}
+
+
+/* We set these global variables before calling c_parse, to tell it
+ how it to find macro definitions for the expression at hand. */
+macro_lookup_ftype *expression_macro_lookup_func;
+void *expression_macro_lookup_baton;
+
+
+static struct macro_definition *
+null_macro_lookup (const char *name, void *baton)
+{
+ return 0;
+}
+
+
+static int
+c_preprocess_and_parse (void)
+{
+ /* Set up a lookup function for the macro expander. */
+ struct macro_scope *scope = 0;
+ struct cleanup *back_to = make_cleanup (free_current_contents, &scope);
+
+ if (expression_context_block)
+ scope = sal_macro_scope (find_pc_line (expression_context_pc, 0));
+ else
+ scope = default_macro_scope ();
+
+ if (scope)
+ {
+ expression_macro_lookup_func = standard_macro_lookup;
+ expression_macro_lookup_baton = (void *) scope;
+ }
+ else
+ {
+ expression_macro_lookup_func = null_macro_lookup;
+ expression_macro_lookup_baton = 0;
+ }
+
+ gdb_assert (! macro_original_text);
+ make_cleanup (scan_macro_cleanup, 0);
+
+ {
+ int result = c_parse ();
+ do_cleanups (back_to);
+ return result;
+ }
+}
+
+
+\f
/* Table mapping opcodes into strings for printing operators
and precedences of the operators. */
{NULL, 0, 0, 0}
};
\f
-struct type **CONST_PTR (c_builtin_types[]) =
+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
+ &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_builtin_types,
range_check_off,
type_check_off,
- c_parse,
+ case_sensitive_on,
+ c_preprocess_and_parse,
c_error,
evaluate_subexp_standard,
c_printchar, /* Print a character constant */
struct type **const (cplus_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,
- &builtin_type_bool,
- 0
+ &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,
+ &builtin_type_bool,
+ 0
};
const struct language_defn cplus_language_defn =
cplus_builtin_types,
range_check_off,
type_check_off,
- c_parse,
+ case_sensitive_on,
+ c_preprocess_and_parse,
c_error,
evaluate_subexp_standard,
c_printchar, /* Print a character constant */
c_builtin_types,
range_check_off,
type_check_off,
- c_parse,
+ case_sensitive_on,
+ c_preprocess_and_parse,
c_error,
evaluate_subexp_standard,
c_printchar, /* Print a character constant */
projects / binutils.git / blobdiff