/* GNU Objective-C Runtime API.
- Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1995, 1996, 1997 Free Software Foundation, Inc.
This file is part of GNU CC.
#include "objc/hash.h"
#include "objc/thr.h"
#include <stdio.h>
+#include <stdarg.h>
/* For functions which return Method_t */
#define METHOD_NULL (Method_t)0
#define _C_STRUCT_E '}'
+/*
+** Error handling
+**
+** Call objc_error() or objc_verror() to record an error; this error
+** routine will generally exit the program but not necessarily if the
+** user has installed his own error handler.
+**
+** Call objc_set_error_handler to assign your own function for
+** handling errors. The function should return YES if it is ok
+** to continue execution, or return NO or just abort if the
+** program should be stopped. The default error handler is just to
+** print a message on stderr.
+**
+** The error handler function should be of type objc_error_handler
+** The first parameter is an object instance of relevance.
+** The second parameter is an error code.
+** The third parameter is a format string in the printf style.
+** The fourth parameter is a variable list of arguments.
+*/
+extern void objc_error(id object, int code, const char* fmt, ...);
+extern void objc_verror(id object, int code, const char* fmt, va_list ap);
+typedef BOOL (*objc_error_handler)(id, int code, const char *fmt, va_list ap);
+objc_error_handler objc_set_error_handler(objc_error_handler func);
+
+/*
+** Error codes
+** These are used by the runtime library, and your
+** error handling may use them to determine if the error is
+** hard or soft thus whether execution can continue or abort.
+*/
+#define OBJC_ERR_UNKNOWN 0 /* Generic error */
+
+#define OBJC_ERR_OBJC_VERSION 1 /* Incorrect runtime version */
+#define OBJC_ERR_GCC_VERSION 2 /* Incorrect compiler version */
+#define OBJC_ERR_MODULE_SIZE 3 /* Bad module size */
+#define OBJC_ERR_PROTOCOL_VERSION 4 /* Incorrect protocol version */
+
+#define OBJC_ERR_MEMORY 10 /* Out of memory */
+
+#define OBJC_ERR_RECURSE_ROOT 20 /* Attempt to archive the root
+ object more than once. */
+#define OBJC_ERR_BAD_DATA 21 /* Didn't read expected data */
+#define OBJC_ERR_BAD_KEY 22 /* Bad key for object */
+#define OBJC_ERR_BAD_CLASS 23 /* Unknown class */
+#define OBJC_ERR_BAD_TYPE 24 /* Bad type specification */
+#define OBJC_ERR_NO_READ 25 /* Cannot read stream */
+#define OBJC_ERR_NO_WRITE 26 /* Cannot write stream */
+#define OBJC_ERR_STREAM_VERSION 27 /* Incorrect stream version */
+#define OBJC_ERR_BAD_OPCODE 28 /* Bad opcode */
+
+#define OBJC_ERR_UNIMPLEMENTED 30 /* Method is not implemented */
/*
** Set this variable nonzero to print a line describing each