PART 19: Saving and restoring equivalents

宏定义
#define	savetype(x)   save_stack[x].hh.UU.U2.b0
	[p109#268] classifies a |save_stack| entry 更多...
#define	savelevel(x)   save_stack[x].hh.UU.U2.b1
	[p109#268] saved level for regions 5 and 6, or group code 更多...
#define	saveindex(x)   save_stack[x].hh.rh
	[p109#268] |eqtb| location or |save_stack| location 更多...
#define	saved(x)   save_stack[save_ptr + x].int_
	[p111#274] 更多...

枚举
enum	SaveType { restoreoldvalue , restorezero , inserttoken , levelboundary }
	[#268] 更多...
enum	GroupCode {   bottomlevel = 0 , simplegroup , hboxgroup , adjustedhboxgroup ,   vboxgroup , vtopgroup = 5 , aligngroup , noaligngroup ,   outputgroup , mathgroup , discgroup = 10 , insertgroup ,   vcentergroup , mathchoicegroup , semisimplegroup , mathshiftgroup = 15 ,   mathleftgroup = 16 , MAX_GROUP_CODE = 16 }
	[#269] group codes that are used to discriminate between different kinds of groups. 更多...

函数
void	eqtb_save_init ()
	[#272, #287] 更多...
void	new_save_level (GroupCode c)
void	eq_destroy (MemoryWord w)
void	eq_save (HalfWord p, QuarterWord l)
void	eq_define (HalfWord p, QuarterWord t, HalfWord e)
void	eq_word_define (HalfWord p, long w)
void	geq_define (HalfWord p, QuarterWord t, HalfWord e)
void	geq_word_define (HalfWord p, long w)
void	save_for_after (HalfWord t)
void	restore_trace (HalfWord p, StrNumber s)
	#284 更多...
void	unsave (void)
void	prepare_mag (void)

变量
MemoryWord	save_stack [SAVE_SIZE+1]
	[ #268~288: SAVING AND RESTORING EQUIVALENTS ] [#271] 更多...
UInt16	save_ptr
UInt16	max_save_stack
QuarterWord	cur_level
GroupCode	cur_group
UInt16	cur_boundary
Integer	mag_set

详细描述

宏定义说明

saved

#define saved

(

x

)

save_stack[save_ptr + x].int_

[p111#274]

saveindex

#define saveindex

(

x

)

save_stack[x].hh.rh

[p109#268] |eqtb| location or |save_stack| location

savelevel

#define savelevel

(

x

)

save_stack[x].hh.UU.U2.b1

[p109#268] saved level for regions 5 and 6, or group code

savetype

#define savetype

(

x

)

save_stack[x].hh.UU.U2.b0

[p109#268] classifies a |save_stack| entry

枚举类型说明

GroupCode

enum GroupCode

[#269] group codes that are used to discriminate between different kinds of groups.

枚举值
bottomlevel	the outside world
simplegroup	local structure only
hboxgroup	\hbox{...}
adjustedhboxgroup	\hbox{...} in vertical mode
vboxgroup	\vbox{...}
vtopgroup	\vtop{...}
aligngroup	\halign{...}, \valign{...}
noaligngroup	\noalign{...}
outputgroup	output routine
mathgroup	^{...}
discgroup	\discretionary{...}{...}{...}
insertgroup	\insert{...}, \vadjust{...}
vcentergroup	\vcenter{...}
mathchoicegroup	\mathchoice{...}{...}{...}{...}
semisimplegroup	\begingroup...\endgroup
mathshiftgroup	$...$
mathleftgroup	\left...\right
MAX_GROUP_CODE

SaveType

enum SaveType

[#268]

枚举值
restoreoldvalue	when a value should be restored later
restorezero	when an undefined entry should be restored
inserttoken	when a token is being saved for later use
levelboundary	corresponding to beginning of group

函数说明

eq_define()

void eq_define	(	HalfWord	p,
		QuarterWord	t,
		HalfWord	e
	)

eq_destroy()

void eq_destroy

(

MemoryWord

w

)

eq_save()

void eq_save	(	HalfWord	p,
		QuarterWord	l
	)

eq_word_define()

void eq_word_define	(	HalfWord	p,
		long	w
	)

eqtb_save_init()

void eqtb_save_init

(

)

[#272, #287]

[#272]

[#287]

geq_define()

void geq_define	(	HalfWord	p,
		QuarterWord	t,
		HalfWord	e
	)

geq_word_define()

void geq_word_define	(	HalfWord	p,
		long	w
	)

new_save_level()

void new_save_level

(

GroupCode

c

)

prepare_mag()

void prepare_mag

(

void

)

restore_trace()

void restore_trace	(	HalfWord	p,
		StrNumber	s
	)

#284

save_for_after()

void save_for_after

(

HalfWord

t

)

unsave()

void unsave

(

void

)

变量说明

cur_boundary

UInt16 cur_boundary

cur_group

GroupCode cur_group

cur_level

QuarterWord cur_level

mag_set

Integer mag_set

max_save_stack

UInt16 max_save_stack

save_ptr

UInt16 save_ptr

save_stack

MemoryWord save_stack[SAVE_SIZE+1]

[ #268~288: SAVING AND RESTORING EQUIVALENTS ] [#271]