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- /* Simple interpreter interface for GDB, the GNU debugger.
- Copyright (C) 1996 Free Software Foundation
-
- 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.
-
- The author can be reached at djurfeldt@nada.kth.se
- Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN */
-
- #ifndef GDB_INTERFACE_H
- #define GDB_INTERFACE_H
-
- /* This is the header file for GDB's interpreter interface. The
- interpreter must supply definitions of all symbols declared in this
- file.
-
- Before including this file, you must #define GDB_TYPE to be the
- data type used for communication with the interpreter. */
-
- /* The following macro can be used to anchor the symbols of the
- interface in your main program. This is necessary if the interface
- is defined in a library, such as Guile. */
-
- #define GDB_INTERFACE \
- void *gdb_interface[] = { \
- &gdb_options, \
- &gdb_language, \
- &gdb_result, \
- &gdb_output, \
- &gdb_output_length, \
- (void *) gdb_maybe_valid_type_p, \
- (void *) gdb_read, \
- (void *) gdb_eval, \
- (void *) gdb_print, \
- (void *) gdb_binding \
- }
-
- /* GDB_OPTIONS is a set of flags informing gdb what features are present
- in the interface. Currently only one option is supported: */
-
- /* GDB_HAVE_BINDINGS: Set this bit if your interpreter can create new
- top level bindings on demand (through gdb_top_level_binding) */
-
- #define GDB_HAVE_BINDINGS 1
-
- extern unsigned short gdb_options;
-
- /* GDB_LANGUAGE holds the name of the preferred language mode for this
- interpreter. For lisp interpreters, the suggested mode is "lisp/c". */
-
- extern char *gdb_language;
-
- /* GDB_RESULT is used for passing results from the interpreter to GDB */
-
- extern GDB_TYPE gdb_result;
-
- /* The interpreter passes strings to GDB in GDB_OUTPUT and
- GDB_OUTPUT_LENGTH. GDB_OUTPUT should hold the pointer to the
- string. GDB_OUTPUT_LENGTH should hold its length. The string
- doesn't need to be terminated by '\0'. */
-
- extern char *gdb_output;
-
- extern int gdb_output_length;
-
- /* Return TRUE if the interpreter regards VALUE's type as valid. A
- lazy implementation is allowed to pass TRUE always. FALSE should
- only be returned when it is certain that VALUE is not valid.
-
- In the "lisp/c" language mode, this is used to heuristically
- discriminate lisp values from C values during printing. */
-
- extern int gdb_maybe_valid_type_p SCM_P ((GDB_TYPE value));
-
- /* Parse expression in string STR. Store result in GDB_RESULT, then
- return 0 to indicate success. On error, return -1 to indicate
- failure. An error string can be passed in GDB_OUTPUT and
- GDB_OUTPUT_LENGTH. Be careful to set GDB_OUTPUT_LENGTH to zero if
- no message is passed. Please note that the resulting value should
- be protected against garbage collection. */
-
- extern int gdb_read SCM_P ((char *str));
-
- /* Evaluate expression EXP. Store result in GDB_RESULT, then return 0
- to indicate success. On error, return -1 to indicate failure. Any
- output (both on success and failure) can be passed in GDB_OUTPUT
- and GDB_OUTPUT_LENGTH. Be careful to set GDB_OUTPUT_LENGTH to zero
- if no output is passed. Please note that the resulting lisp object
- should be protected against garbage collection. */
-
- extern int gdb_eval SCM_P ((GDB_TYPE exp));
-
- /* Print VALUE. Store output in GDB_OUTPUT and GDB_OUTPUT_LENGTH.
- Return 0 to indicate success. On error, return -1 to indicate
- failure. GDB will not look at GDB_OUTPUT or GDB_OUTPUT_LENGTH on
- failure. Note that this function should be robust against strange
- values. It could in fact be passed any kind of value. */
-
- extern int gdb_print SCM_P ((GDB_TYPE value));
-
- /* Bind NAME to VALUE in interpreter. (GDB has previously obtained
- NAME by passing a string to gdb_read.) Return 0 to indicate
- success or -1 to indicate failure. This feature is optional. GDB
- will only call this function if the GDB_HAVE_BINDINGS flag is set
- in gdb_options. Note that GDB may call this function many times
- for the same name.
-
- For scheme interpreters, this function should introduce top-level
- bindings. */
-
- extern int gdb_binding SCM_P ((GDB_TYPE name, GDB_TYPE value));
-
- #endif /* GDB_INTERFACE_H */
-