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/* the common types are handled in _begin.def and _end.def, individual .def files are free to create special types as well, but should
 * provide macros for all the ifdef's supported here for any additions.
 */

/* for declaring the want-specific sample data structure (used by vmon.h) */
#ifdef VMON_DECLARE_MEMBERS
#define vmon_datum_str(_name, _sym, _label, _desc)		char			*_name;
#define vmon_datum_str_array(_name, _sym, _label, _desc)	char			**_name;
#define vmon_datum_char(_name, _sym, _label, _desc)		char			_name;
#define vmon_datum_char_array(_name, _sym, _label, _desc)	vmon_char_array_t	_name;
#define vmon_datum_int(_name, _sym, _label, _desc)		int			_name;
#define vmon_datum_uint(_name, _sym, _label, _desc)		unsigned int		_name;
#define vmon_datum_ulong(_name, _sym, _label, _desc)		unsigned long		_name;
#define vmon_datum_ulonglong(_name, _sym, _label, _desc)	unsigned long long	_name;
#define vmon_datum_long(_name, _sym, _label, _desc)		long			_name;
#define vmon_datum_longlong(_name, _sym, _label, _desc)		long long		_name;

/* leave omissions undefined, they'll get defined as noops at the end of this file */
#endif



/* for creating the symbolic constants enumeration (used by vmon.h) */
#ifdef VMON_ENUM_SYMBOLS
#define vmon_datum_str(_name, _sym, _label, _desc)		VMON_ ## _sym,
#define vmon_datum_str_array(_name, _sym, _label, _desc)	VMON_ ## _sym,
#define vmon_datum_char(_name, _sym, _label, _desc)		VMON_ ## _sym,
#define vmon_datum_char_array(_name, _sym, _label, _desc)	VMON_ ## _sym,
#define vmon_datum_int(_name, _sym, _label, _desc)		VMON_ ## _sym,
#define vmon_datum_uint(_name, _sym, _label, _desc)		VMON_ ## _sym,
#define vmon_datum_ulong(_name, _sym, _label, _desc)		VMON_ ## _sym,
#define vmon_datum_ulonglong(_name, _sym, _label, _desc)	VMON_ ## _sym,
#define vmon_datum_long(_name, _sym, _label, _desc)		VMON_ ## _sym,
#define vmon_datum_longlong(_name, _sym, _label, _desc)		VMON_ ## _sym,

/* leave omissions undefined, they'll get defined as noops at the end of this file */
#endif



/* for creating an offset table relating symbols to struct member offsets */
#ifdef VMON_INITIALIZE_OFFSET_TABLE
/* TODO: error out using #error if VMON_OFFSET_TABLE_STRUCT is not defined */
/* I use the gcc builtin here because it's convenient, otherwise we either do the double macro expansion dance or put the offsetof definition here */
#define vmon_datum_str(_name, _sym, _label, _desc)		__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_str_array(_name, _sym, _label, _desc)	__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_char(_name, _sym, _label, _desc)		__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_char_array(_name, _sym, _label, _desc)	__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_int(_name, _sym, _label, _desc)		__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_uint(_name, _sym, _label, _desc)		__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_ulong(_name, _sym, _label, _desc)		__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_ulonglong(_name, _sym, _label, _desc)	__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_long(_name, _sym, _label, _desc)		__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),
#define vmon_datum_longlong(_name, _sym, _label, _desc)		__builtin_offsetof(VMON_OFFSET_TABLE_STRUCT, _name),

/* no offsets can exist for omitted members, so they're declared as nops */
/* leave omissions undefined, they'll get defined as noops at the end of this file */
#endif



/* for creating a lookup table for the member names as strings, indexed by the enumerated symbols */
#ifdef VMON_INITIALIZE_NAME_TABLE
#define vmon_datum_str(_name, _sym, _label, _desc)		#_name ,
#define vmon_datum_str_array(_name, _sym, _label, _desc)	#_name ,
#define vmon_datum_char(_name, _sym, _label, _desc)		#_name ,
#define vmon_datum_char_array(_name, _sym, _label, _desc)	#_name ,
#define vmon_datum_int(_name, _sym, _label, _desc)		#_name ,
#define vmon_datum_uint(_name, _sym, _label, _desc)		#_name ,
#define vmon_datum_ulong(_name, _sym, _label, _desc)		#_name ,
#define vmon_datum_ulonglong(_name, _sym, _label, _desc)	#_name ,
#define vmon_datum_long(_name, _sym, _label, _desc)		#_name ,
#define vmon_datum_longlong(_name, _sym, _label, _desc)		#_name ,

/* leave omissions undefined, they'll get defined as noops at the end of this file */
#endif



/* for creating a lookup table for the human-readable descriptions, indexed by the enumerated symbols */
#ifdef VMON_INITIALIZE_DESC_TABLE
#define vmon_datum_str(_name, _sym, _label, _desc)		_desc ,
#define vmon_datum_str_array(_name, _sym, _label, _desc)	_desc ,
#define vmon_datum_char(_name, _sym, _label, _desc)		_desc ,
#define vmon_datum_char_array(_name, _sym, _label, _desc)	_desc ,
#define vmon_datum_int(_name, _sym, _label, _desc)		_desc ,
#define vmon_datum_uint(_name, _sym, _label, _desc)		_desc ,
#define vmon_datum_ulong(_name, _sym, _label, _desc)		_desc ,
#define vmon_datum_ulonglong(_name, _sym, _label, _desc)	_desc ,
#define vmon_datum_long(_name, _sym, _label, _desc)		_desc ,
#define vmon_datum_longlong(_name, _sym, _label, _desc)		_desc ,

/* leave omissions undefined, they'll get defined as noops at the end of this file */
#endif



/* these are different from the symbols, because they ignore the omissions, the definition includes all fields so we can parse the file,
 * but the symbols only relate to fields we actually store in memory. */
#ifdef VMON_ENUM_PARSER_STATES
#define vmon_datum_str(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_str_array(_name, _sym, _label, _desc)	VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_char(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_char_array(_name, _sym, _label, _desc)	VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_int(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_uint(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_ulong(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_ulonglong(_name, _sym, _label, _desc)	VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_long(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_datum_longlong(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,

#define vmon_omit_n(_n, _sym, _desc)				VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_literal(_lit, _sym)				VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_run(_char, _sym)				VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_str(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_str_array(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_char(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define	vmon_omit_char_array(_name, _sym, _label, _desc)	VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_int(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_uint(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_ulong(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_ulonglong(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_long(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#define vmon_omit_longlong(_name, _sym, _label, _desc)		VMON_PARSER_STATE_ ## _sym,
#endif


/* most the stuff we need in scope for the parser generated via VMON_IMPLEMENT_PARSER before including the appropriate .def */
#ifdef VMON_PREPARE_PARSER
	char			input;
	int			var_isneg = 0;
	int			var_int = 0;
	unsigned int		var_uint = 0;
	long			var_long = 0;
	long long 		var_longlong = 0;
	unsigned long		var_ulong = 0;
	unsigned long long 	var_ulonglong = 0;
	char			*var_array = NULL;
	int			var_array_alloc_len = 0, var_array_len = 0;

#define vmon_datum_str(_name, _sym, _label, _desc)
#define vmon_datum_str_array(_name, _sym, _label, _desc)
#define vmon_datum_char(_name, _sym, _label, _desc)
#define vmon_datum_char_array(_name, _sym, _label, _desc)
#define vmon_datum_int(_name, _sym, _label, _desc)
#define vmon_datum_uint(_name, _sym, _label, _desc)
#define vmon_datum_ulong(_name, _sym, _label, _desc)
#define vmon_datum_ulonglong(_name, _sym, _label, _desc)
#define vmon_datum_long(_name, _sym, _label, _desc)
#define vmon_datum_longlong(_name, _sym, _label, _desc)

#define vmon_omit_n(_n, _sym, _desc)
#define vmon_omit_literal(_lit, _sym)
#define vmon_omit_run(_char, _sym)
#define vmon_omit_str(_name, _sym, _label, _desc)
#define vmon_omit_str_array(_name, _sym, _label, _desc)
#define vmon_omit_char(_name, _sym, _label, _desc)
#define	vmon_omit_char_array(_name, _sym, _label, _desc)
#define vmon_omit_int(_name, _sym, _label, _desc)
#define vmon_omit_uint(_name, _sym, _label, _desc)
#define vmon_omit_ulong(_name, _sym, _label, _desc)
#define vmon_omit_ulonglong(_name, _sym, _label, _desc)
#define vmon_omit_long(_name, _sym, _label, _desc)
#define vmon_omit_longlong(_name, _sym, _label, _desc)
#endif


/* implements the cases for a simple switch()-based bytestream parser */
#ifdef VMON_IMPLEMENT_PARSER
/* TODO: error out if the following aren't defined, these are utilized by the parser FSM:
 * VMON_PARSER_DELIM		<-- what value to treat as a delimiter for string/char arrays (sort of like IFS in bash)
 * TODO: there are a bunch of variables we assume are available and named a certain way here,
 * it would be preferable to be able to define those externally and inform the x-macro of their
 * names etc.
 */
#define vmon_datum_str(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case VMON_PARSER_DELIM:\
											/* store accumulated string, reset tmp, and advance */\
											if(*store)->_name) {\
												if(	strncmp((*store)->name, _array, var_array_len) ||\
													(*store)->name[var_array_len] != '\0') {\
														BITSET((*store)->changed, VMON_ ## _sym);\
														changes++;\
												}\
												free((*store)->name);\
											} else {\
												BITSET((*store)->changed, VMON_ ## _sym);\
												changes++;\
											}\
											(*store)->_name = strndup(var_array, var_array_len);\
											var_array_len = 0;\
											state++;\
											break;\
										default:\
											/* accumulate string */\
											var_array[var_array_len++] = input;\
											break;\
									}\
									break;

#define vmon_datum_str_array(_name, _sym, _label, _desc)	case VMON_PARSER_STATE_ ## _sym:\
									/* TODO ? */ \
									break;

#define vmon_datum_char(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									if((*store)->_name != input) {\
										BITSET((*store)->changed, VMON_ ## _sym);\
										changes++;\
										(*store)->_name = input;\
									}\
									state++;\
									break;

#define vmon_datum_char_array(_name, _sym, _label, _desc)	case VMON_PARSER_STATE_ ## _sym:\
									/* TODO */\
									/* TODO */\
									break;

#define vmon_datum_int(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '-':\
											/* TODO: we don't verify the '-' is leading... */\
											var_isneg = 1;\
											break;\
										case '0' ... '9':\
											var_int *= 10;\
											var_int += input - '0';\
											break;\
										default:\
											if(var_isneg) {\
												var_int = -var_int;\
												var_isneg = 0;\
											}\
											if((*store)->_name != var_int) {\
												BITSET((*store)->changed, VMON_ ## _sym);\
												changes++;\
												(*store)->_name = var_int;\
											}\
											var_int = 0;\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_datum_uint(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
											var_uint *= 10;\
											var_uint += input - '0';\
											break;\
										default:\
											if((*store)->_name != var_uint) {\
												BITSET((*store)->changed, VMON_ ## _sym);\
												changes++;\
												(*store)->_name = var_uint;\
											}\
											var_uint = 0;\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_datum_ulong(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
											var_ulong *= 10;\
											var_ulong += input - '0';\
											break;\
										default:\
											if((*store)->_name != var_ulong) {\
												BITSET((*store)->changed, VMON_ ## _sym);\
												changes++;\
												(*store)->_name = var_ulong;\
											}\
											var_ulong = 0;\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_datum_ulonglong(_name, _sym, _label, _desc)	case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
											var_ulonglong *= 10;\
											var_ulonglong += input - '0';\
											break;\
										default:\
											if((*store)->_name != var_ulonglong) {\
												BITSET((*store)->changed, VMON_ ## _sym);\
												changes++;\
												(*store)->_name = var_ulonglong;\
											}\
											var_ulonglong = 0;\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_datum_long(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '-':\
											/* TODO: we dont verify the '-' is leading... */\
											var_isneg = 1;\
											break;\
										case '0' ... '9':\
											var_long *= 10;\
											var_long += input - '0';\
											break;\
										default:\
											if(var_isneg) {\
												var_long = -var_long;\
												var_isneg = 0;\
											}\
											if((*store)->_name != var_long) {\
												BITSET((*store)->changed, VMON_ ## _sym);\
												changes++;\
												(*store)->_name = var_long;\
											}\
											var_long = 0;\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_datum_longlong(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '-':\
											/* TODO: we dont verify the '-' is leading... */\
											var_isneg = 1;\
											break;\
										case '0' ... '9':\
											var_longlong *= 10;\
											var_longlong += input - '0';\
											break;\
										default:\
											if(var_isneg) {\
												var_longlong = -var_longlong;\
												var_isneg = 0;\
											}\
											if((*store)->_name != var_longlong) {\
												BITSET((*store)->changed, VMON_ ## _sym);\
												changes++;\
												(*store)->_name = var_longlong;\
											}\
											var_longlong = 0;\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

/* parse but simply skip omitted fields, advance on the delimiter */
#define vmon_omit_n(_n, _sym, _desc)				case VMON_PARSER_STATE_ ## _sym:\
									var_int++;\
									if(var_int >= _n) {\
										var_int = 0;\
										state++;\
									}\
									break;

#define vmon_omit_literal(_lit, _sym)				case VMON_PARSER_STATE_ ## _sym:\
									/* TODO make this actually match the literal, for now we skip the length. */ \
									var_int++;\
									if(var_int >= (sizeof(_lit) - 1)) {\
										var_int = 0;\
										state++;\
									}\
									break;

#define vmon_omit_run(_char, _sym)				case VMON_PARSER_STATE_ ## _sym:\
									if(input != _char) {\
										state++;\
										/* XXX: we fall-through to the next case because this byte belongs to the next state */\
									} else {\
										break;\
									}


#define vmon_omit_str(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									if(input == VMON_PARSER_DELIM) {\
										state++;\
									} else {\
										break;\
									}

#define vmon_omit_str_array(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									if(input == VMON_PARSER_DELIM) {\
										state++;\
									} else {\
										break;\
									}

#define vmon_omit_char(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									state++;\
									break;

#define	vmon_omit_char_array(_name, _sym, _label, _desc)	case VMON_PARSER_STATE_ ## _sym:\
									if(input == VMON_PARSER_DELIM) {\
										state++;\
									} else {\
										break;\
									}

#define vmon_omit_int(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
										case '-':\
											break;\
										default:\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_omit_uint(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
											break;\
										default:\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_omit_ulong(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
											break;\
										default:\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_omit_ulonglong(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
											break;\
										default:\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_omit_long(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
										case '-':\
											break;\
										default:\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}

#define vmon_omit_longlong(_name, _sym, _label, _desc)		case VMON_PARSER_STATE_ ## _sym:\
									switch(input) {\
										case '0' ... '9':\
										case '-':\
											break;\
										default:\
											state++;\
											break;\
									}\
									if(state == VMON_PARSER_STATE_ ## _sym) {\
										/* we want to fall-through when the state advances */\
										break;\
									}
#endif


/* for convenience, if the omit macros are undefind define them as noops, since that's the most common pattern */
/* XXX TODO: we may need to add some mechanism for informing the VMON_SUPPRESS_UNDEFS clause in _end.def when these
 * have been automatically defined vs. explicitly defined.  When automatically defined, we should undefine them regarldess
 * of undef suppression.  But when they are explicitly defined prior to entering here, we should honor the undef suppression.
 * I'm going to leave it as-is for now until it bites me in the ass.
 */
#ifndef vmon_omit_n
# define vmon_omit_n(_n, _sym, _desc)
#endif
#ifndef vmon_omit_literal
# define vmon_omit_literal(_lit, _sym)
#endif
#ifndef vmon_omit_run
# define vmon_omit_run(_char, _sym)
#endif
#ifndef vmon_omit_str
# define vmon_omit_str(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_str_array
# define vmon_omit_str_array(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_char
# define vmon_omit_char(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_char_array
# define vmon_omit_char_array(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_int
# define vmon_omit_int(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_uint
# define vmon_omit_uint(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_ulong
# define vmon_omit_ulong(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_ulonglong
# define vmon_omit_ulonglong(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_long
# define vmon_omit_long(_name, _sym, _label, _desc)
#endif
#ifndef vmon_omit_longlong
# define vmon_omit_longlong(_name, _sym, _label, _desc)
#endif
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