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/*
* Portable Exception Handling for ANSI C.
* Copyright (C) 1999 Kaz Kylheku <kaz@ashi.footprints.net>
*
* Free Software License:
*
* All rights are reserved by the author, with the following exceptions:
* Permission is granted to freely reproduce and distribute this software,
* possibly in exchange for a fee, provided that this copyright notice appears
* intact. Permission is also granted to adapt this software to produce
* derivative works, as long as the modified versions carry this copyright
* notice and additional notices stating that the work has been modified.
* This source code may be translated into executable form and incorporated
* into proprietary software; there is no requirement for such software to
* contain a copyright notice related to this source.
*
*/
/**
* @file
* Portable Exception Handling for ANSI C.<BR>
* Modified to support throwing an exception with a null message pointer,
* and to have the message not be const (as we generate messages with
* "ws_strdup_printf()", which means they need to be freed; using
* a null message means that we don't have to use a special string
* for exceptions with no message, and don't have to worry about
* not freeing that).
*/
#ifndef XCEPT_H
#define XCEPT_H
#include <glib.h>
#include <setjmp.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
#include "ws_symbol_export.h"
#include "ws_attributes.h"
#define XCEPT_GROUP_ANY 0
#define XCEPT_CODE_ANY 0
#define XCEPT_BAD_ALLOC 1
#ifdef __cplusplus
extern "C" {
#endif
enum { except_no_call, except_call };
typedef struct {
unsigned long except_group;
unsigned long except_code;
} except_id_t;
typedef struct {
except_id_t volatile except_id;
const char *volatile except_message;
void *volatile except_dyndata;
} except_t;
struct except_cleanup {
void (*except_func)(void *);
void *except_context;
};
struct except_catch {
const except_id_t *except_id;
size_t except_size;
except_t except_obj;
jmp_buf except_jmp;
};
enum except_stacktype {
XCEPT_CLEANUP, XCEPT_CATCHER
};
struct except_stacknode {
struct except_stacknode *except_down;
enum except_stacktype except_type;
union {
struct except_catch *except_catcher;
struct except_cleanup *except_cleanup;
} except_info;
};
/* private functions made external so they can be used in macros */
extern void except_setup_clean(struct except_stacknode *,
struct except_cleanup *, void (*)(void *), void *);
WS_DLL_PUBLIC void except_setup_try(struct except_stacknode *,
struct except_catch *, const except_id_t [], size_t);
WS_DLL_PUBLIC struct except_stacknode *except_pop(void);
/* public interface functions */
WS_DLL_PUBLIC int except_init(void);
WS_DLL_PUBLIC void except_deinit(void);
WS_DLL_PUBLIC WS_NORETURN void except_rethrow(except_t *);
WS_DLL_PUBLIC WS_NORETURN void except_throw(long, long, const char *);
WS_DLL_PUBLIC WS_NORETURN void except_throwd(long, long, const char *, void *);
WS_DLL_PUBLIC WS_NORETURN void except_vthrowf(long group, long code, const char *fmt, va_list vl);
WS_DLL_PUBLIC WS_NORETURN void except_throwf(long, long, const char *, ...)
G_GNUC_PRINTF(3, 4);
WS_DLL_PUBLIC void (*except_unhandled_catcher(void (*)(except_t *)))(except_t *);
extern unsigned long except_code(except_t *);
extern unsigned long except_group(except_t *);
extern const char *except_message(except_t *);
extern void *except_data(except_t *);
WS_DLL_PUBLIC void *except_take_data(except_t *);
WS_DLL_PUBLIC void except_set_allocator(void *(*)(size_t), void (*)(void *));
WS_DLL_PUBLIC void *except_alloc(size_t);
WS_DLL_PUBLIC void except_free(void *);
#define except_code(E) ((E)->except_id.except_code)
#define except_group(E) ((E)->except_id.except_group)
#define except_message(E) ((E)->except_message)
#define except_data(E) ((E)->except_dyndata)
#ifdef __cplusplus
}
#endif
/*
* void except_cleanup_push(void (*)(void *), void *);
* void except_cleanup_pop(int);
* void except_checked_cleanup_pop(void (*)(void *), int);
* void except_try_push(const except_id_t [], size_t, except_t **);
* void except_try_pop(void);
*/
#define except_cleanup_push(F, C) \
{ \
struct except_stacknode except_sn; \
struct except_cleanup except_cl; \
except_setup_clean(&except_sn, &except_cl, F, C)
#define except_cleanup_pop(E) \
except_pop(); \
if (E) \
except_cl.except_func(except_cl.except_context); \
}
#define except_checked_cleanup_pop(F, E) \
except_pop(); \
assert (except_cl.except_func == (F)); \
if (E) \
except_cl.except_func(except_cl.except_context); \
}
/* --- Variants to allow nesting of except_cleanup_push w/o "shadowing" variables */
#define except_cleanup_push_pfx(pfx, F, C) \
{ \
struct except_stacknode pfx##_except_sn; \
struct except_cleanup pfx##_except_cl; \
except_setup_clean(&pfx##_except_sn, &pfx##_except_cl, F, C)
#define except_cleanup_pop_pfx(pfx, E) \
except_pop(); \
if (E) \
pfx##_except_cl.except_func(pfx##_except_cl.except_context);\
}
#define except_checked_cleanup_pop_pfx(pfx, F, E) \
except_pop(); \
assert (pfx##_except_cl.except_func == (F)); \
if (E) \
pfx##_except_cl.except_func(pfx##_except_cl.except_context);\
}
/* ---------- */
#define except_try_push(ID, NUM, PPE) \
{ \
struct except_stacknode except_sn; \
struct except_catch except_ch; \
except_setup_try(&except_sn, &except_ch, ID, NUM); \
if (setjmp(except_ch.except_jmp)) \
*(PPE) = &except_ch.except_obj; \
else \
*(PPE) = 0
#define except_try_pop() \
except_free(except_ch.except_obj.except_dyndata); \
except_pop(); \
}
#endif /* XCEPT_H */
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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