479 lines
14 KiB
C
479 lines
14 KiB
C
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/* C language support routines for GDB, the GNU debugger.
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Copyright 1992, 1993, 1994 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "c-lang.h"
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/* Print the character C on STREAM as part of the contents of a literal
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string whose delimiter is QUOTER. Note that that format for printing
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characters and strings is language specific. */
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static void
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emit_char (c, stream, quoter)
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register int c;
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GDB_FILE *stream;
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int quoter;
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{
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c &= 0xFF; /* Avoid sign bit follies */
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if (PRINT_LITERAL_FORM (c))
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{
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if (c == '\\' || c == quoter)
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{
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fputs_filtered ("\\", stream);
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}
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fprintf_filtered (stream, "%c", c);
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}
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else
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{
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switch (c)
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{
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case '\n':
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fputs_filtered ("\\n", stream);
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break;
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case '\b':
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fputs_filtered ("\\b", stream);
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break;
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case '\t':
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fputs_filtered ("\\t", stream);
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break;
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case '\f':
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fputs_filtered ("\\f", stream);
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break;
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case '\r':
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fputs_filtered ("\\r", stream);
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break;
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case '\033':
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fputs_filtered ("\\e", stream);
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break;
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case '\007':
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fputs_filtered ("\\a", stream);
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break;
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default:
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fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
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break;
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}
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}
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}
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void
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c_printchar (c, stream)
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int c;
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GDB_FILE *stream;
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{
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fputs_filtered ("'", stream);
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emit_char (c, stream, '\'');
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fputs_filtered ("'", stream);
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}
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/* Print the character string STRING, printing at most LENGTH characters.
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Printing stops early if the number hits print_max; repeat counts
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are printed as appropriate. Print ellipses at the end if we
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had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. */
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void
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c_printstr (stream, string, length, force_ellipses)
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GDB_FILE *stream;
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char *string;
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unsigned int length;
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int force_ellipses;
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{
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register unsigned int i;
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unsigned int things_printed = 0;
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int in_quotes = 0;
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int need_comma = 0;
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extern int inspect_it;
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extern int repeat_count_threshold;
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extern int print_max;
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/* If the string was not truncated due to `set print elements', and
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the last byte of it is a null, we don't print that, in traditional C
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style. */
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if ((!force_ellipses) && length > 0 && string[length-1] == '\0')
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length--;
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if (length == 0)
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{
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fputs_filtered ("\"\"", stream);
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return;
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}
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for (i = 0; i < length && things_printed < print_max; ++i)
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{
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/* Position of the character we are examining
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to see whether it is repeated. */
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unsigned int rep1;
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/* Number of repetitions we have detected so far. */
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unsigned int reps;
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QUIT;
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if (need_comma)
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{
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fputs_filtered (", ", stream);
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need_comma = 0;
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}
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rep1 = i + 1;
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reps = 1;
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while (rep1 < length && string[rep1] == string[i])
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{
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++rep1;
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++reps;
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}
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if (reps > repeat_count_threshold)
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{
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if (in_quotes)
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{
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if (inspect_it)
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fputs_filtered ("\\\", ", stream);
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else
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fputs_filtered ("\", ", stream);
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in_quotes = 0;
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}
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c_printchar (string[i], stream);
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fprintf_filtered (stream, " <repeats %u times>", reps);
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i = rep1 - 1;
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things_printed += repeat_count_threshold;
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need_comma = 1;
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}
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else
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{
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if (!in_quotes)
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{
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if (inspect_it)
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fputs_filtered ("\\\"", stream);
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else
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fputs_filtered ("\"", stream);
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in_quotes = 1;
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}
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emit_char (string[i], stream, '"');
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++things_printed;
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}
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}
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/* Terminate the quotes if necessary. */
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if (in_quotes)
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{
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if (inspect_it)
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fputs_filtered ("\\\"", stream);
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else
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fputs_filtered ("\"", stream);
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}
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if (force_ellipses || i < length)
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fputs_filtered ("...", stream);
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}
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/* Create a fundamental C type using default reasonable for the current
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target machine.
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Some object/debugging file formats (DWARF version 1, COFF, etc) do not
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define fundamental types such as "int" or "double". Others (stabs or
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DWARF version 2, etc) do define fundamental types. For the formats which
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don't provide fundamental types, gdb can create such types using this
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function.
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FIXME: Some compilers distinguish explicitly signed integral types
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(signed short, signed int, signed long) from "regular" integral types
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(short, int, long) in the debugging information. There is some dis-
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agreement as to how useful this feature is. In particular, gcc does
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not support this. Also, only some debugging formats allow the
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distinction to be passed on to a debugger. For now, we always just
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use "short", "int", or "long" as the type name, for both the implicit
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and explicitly signed types. This also makes life easier for the
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gdb test suite since we don't have to account for the differences
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in output depending upon what the compiler and debugging format
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support. We will probably have to re-examine the issue when gdb
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starts taking it's fundamental type information directly from the
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debugging information supplied by the compiler. fnf@cygnus.com */
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struct type *
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c_create_fundamental_type (objfile, typeid)
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struct objfile *objfile;
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int typeid;
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{
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register struct type *type = NULL;
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switch (typeid)
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{
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default:
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/* FIXME: For now, if we are asked to produce a type not in this
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language, create the equivalent of a C integer type with the
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name "<?type?>". When all the dust settles from the type
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reconstruction work, this should probably become an error. */
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type = init_type (TYPE_CODE_INT,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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0, "<?type?>", objfile);
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warning ("internal error: no C/C++ fundamental type %d", typeid);
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break;
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case FT_VOID:
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type = init_type (TYPE_CODE_VOID,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "void", objfile);
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break;
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case FT_CHAR:
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type = init_type (TYPE_CODE_INT,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "char", objfile);
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break;
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case FT_SIGNED_CHAR:
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type = init_type (TYPE_CODE_INT,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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0, "signed char", objfile);
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break;
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case FT_UNSIGNED_CHAR:
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type = init_type (TYPE_CODE_INT,
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TARGET_CHAR_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
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break;
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case FT_SHORT:
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type = init_type (TYPE_CODE_INT,
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
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0, "short", objfile);
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break;
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case FT_SIGNED_SHORT:
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type = init_type (TYPE_CODE_INT,
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
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0, "short", objfile); /* FIXME-fnf */
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break;
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case FT_UNSIGNED_SHORT:
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type = init_type (TYPE_CODE_INT,
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TARGET_SHORT_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
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break;
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case FT_INTEGER:
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type = init_type (TYPE_CODE_INT,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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0, "int", objfile);
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break;
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case FT_SIGNED_INTEGER:
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type = init_type (TYPE_CODE_INT,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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0, "int", objfile); /* FIXME -fnf */
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break;
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case FT_UNSIGNED_INTEGER:
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type = init_type (TYPE_CODE_INT,
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TARGET_INT_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
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break;
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case FT_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_BIT / TARGET_CHAR_BIT,
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0, "long", objfile);
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break;
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case FT_SIGNED_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_BIT / TARGET_CHAR_BIT,
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0, "long", objfile); /* FIXME -fnf */
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break;
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case FT_UNSIGNED_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
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break;
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case FT_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
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0, "long long", objfile);
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break;
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case FT_SIGNED_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
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0, "signed long long", objfile);
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break;
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case FT_UNSIGNED_LONG_LONG:
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type = init_type (TYPE_CODE_INT,
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TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
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TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
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break;
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case FT_FLOAT:
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type = init_type (TYPE_CODE_FLT,
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TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
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0, "float", objfile);
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break;
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case FT_DBL_PREC_FLOAT:
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type = init_type (TYPE_CODE_FLT,
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TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
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0, "double", objfile);
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break;
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case FT_EXT_PREC_FLOAT:
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type = init_type (TYPE_CODE_FLT,
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TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
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0, "long double", objfile);
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break;
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}
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return (type);
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}
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/* Table mapping opcodes into strings for printing operators
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and precedences of the operators. */
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const struct op_print c_op_print_tab[] =
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{
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{",", BINOP_COMMA, PREC_COMMA, 0},
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{"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
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{"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
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{"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
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{"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
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{"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
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{"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
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{"==", BINOP_EQUAL, PREC_EQUAL, 0},
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{"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
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{"<=", BINOP_LEQ, PREC_ORDER, 0},
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{">=", BINOP_GEQ, PREC_ORDER, 0},
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{">", BINOP_GTR, PREC_ORDER, 0},
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{"<", BINOP_LESS, PREC_ORDER, 0},
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{">>", BINOP_RSH, PREC_SHIFT, 0},
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{"<<", BINOP_LSH, PREC_SHIFT, 0},
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{"+", BINOP_ADD, PREC_ADD, 0},
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{"-", BINOP_SUB, PREC_ADD, 0},
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{"*", BINOP_MUL, PREC_MUL, 0},
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|
|
{"/", 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}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
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,
|
|||
|
|
evaluate_subexp_standard,
|
|||
|
|
c_printchar, /* Print a character constant */
|
|||
|
|
c_printstr, /* Function to print string constant */
|
|||
|
|
c_create_fundamental_type, /* Create fundamental type in this language */
|
|||
|
|
c_print_type, /* Print a type using appropriate syntax */
|
|||
|
|
c_val_print, /* Print a value using appropriate syntax */
|
|||
|
|
c_value_print, /* Print a top-level value */
|
|||
|
|
{"", "", "", ""}, /* Binary format info */
|
|||
|
|
{"0%lo", "0", "o", ""}, /* Octal format info */
|
|||
|
|
{"%ld", "", "d", ""}, /* Decimal format info */
|
|||
|
|
{"0x%lx", "0x", "x", ""}, /* Hex format info */
|
|||
|
|
c_op_print_tab, /* expression operators for printing */
|
|||
|
|
1, /* c-style arrays */
|
|||
|
|
0, /* String lower bound */
|
|||
|
|
&builtin_type_char, /* Type of string elements */
|
|||
|
|
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,
|
|||
|
|
evaluate_subexp_standard,
|
|||
|
|
c_printchar, /* Print a character constant */
|
|||
|
|
c_printstr, /* Function to print string constant */
|
|||
|
|
c_create_fundamental_type, /* Create fundamental type in this language */
|
|||
|
|
c_print_type, /* Print a type using appropriate syntax */
|
|||
|
|
c_val_print, /* Print a value using appropriate syntax */
|
|||
|
|
c_value_print, /* Print a top-level value */
|
|||
|
|
{"", "", "", ""}, /* Binary format info */
|
|||
|
|
{"0%lo", "0", "o", ""}, /* Octal format info */
|
|||
|
|
{"%ld", "", "d", ""}, /* Decimal format info */
|
|||
|
|
{"0x%lx", "0x", "x", ""}, /* Hex format info */
|
|||
|
|
c_op_print_tab, /* expression operators for printing */
|
|||
|
|
1, /* c-style arrays */
|
|||
|
|
0, /* String lower bound */
|
|||
|
|
&builtin_type_char, /* Type of string elements */
|
|||
|
|
LANG_MAGIC
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
const struct language_defn asm_language_defn = {
|
|||
|
|
"asm", /* Language name */
|
|||
|
|
language_asm,
|
|||
|
|
c_builtin_types,
|
|||
|
|
range_check_off,
|
|||
|
|
type_check_off,
|
|||
|
|
c_parse,
|
|||
|
|
c_error,
|
|||
|
|
evaluate_subexp_standard,
|
|||
|
|
c_printchar, /* Print a character constant */
|
|||
|
|
c_printstr, /* Function to print string constant */
|
|||
|
|
c_create_fundamental_type, /* Create fundamental type in this language */
|
|||
|
|
c_print_type, /* Print a type using appropriate syntax */
|
|||
|
|
c_val_print, /* Print a value using appropriate syntax */
|
|||
|
|
c_value_print, /* Print a top-level value */
|
|||
|
|
{"", "", "", ""}, /* Binary format info */
|
|||
|
|
{"0%lo", "0", "o", ""}, /* Octal format info */
|
|||
|
|
{"%ld", "", "d", ""}, /* Decimal format info */
|
|||
|
|
{"0x%lx", "0x", "x", ""}, /* Hex format info */
|
|||
|
|
c_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_c_language ()
|
|||
|
|
{
|
|||
|
|
add_language (&c_language_defn);
|
|||
|
|
add_language (&cplus_language_defn);
|
|||
|
|
add_language (&asm_language_defn);
|
|||
|
|
}
|