PART 45: The page builder

宏定义
#define	insertsonly   1
#define	boxthere   2
#define	pageinsnodesize   4
#define	inserting   0
#define	splitup   1
#define	contribute   80
#define	brokenptr(x)   link(x+1)
	[p367#981] an insertion for this class will break here if anywhere 更多...
#define	brokenins(x)   info(x+1) /* this insertion might break at |brokenptr|}*/
#define	lastinsptr(x)   link(x+2) /* the most recent insertion for this |subtype|}*/
#define	bestinsptr(x)   info(x+2) /* the optimum most recent insertion}*/
#define	setpagesofarzero(x)   (pagesofar[(x)] = 0)
	[p369#987] 更多...
#define	pagegoal   (pagesofar[0])
	[p368#982] desired height of information on page being built 更多...
#define	pagetotal   (pagesofar[1]) /*height of the current page*/
#define	pageshrink   (pagesofar[6]) /*shrinkability of the current page*/
#define	pagedepth   (pagesofar[7]) /*depth of the current page*/
#define	contribtail   (nest[0].tailfield) /*tail of the contribution list*/
	[p371#995] 更多...

函数
static void	_new_cur_page ()
	[#991] page builder init 更多...
void	page_builder_init ()
	[#990, #991] 更多...
void	page_builder_init_once ()
	[#981, #988] 更多...
void	printtotals (void)
void	freezepagespecs (SmallNumber s)
void	boxerror (EightBits n)
void	ensurevbox (EightBits n)
void	fireup (HalfWord c)
void	buildpage (void)

变量
Pointer	pagetail
	[#980] the final node on the current page 更多...
char	pagecontents
	[#980] what is on the current page so far? 更多...
Scaled	pagemaxdepth
	[#980] maximum box depth on page being built 更多...
Pointer	bestpagebreak
	[#980] break here to get the best page known so far 更多...
Integer	leastpagecost
	[#980] the score for this currently best page 更多...
Scaled	bestsize
	[#980] its page goal 更多...
Scaled	pagesofar [8]
	[#982] 更多...
Pointer	lastglue
Scaled	lastkern
Integer	lastpenalty
Integer	insertpenalties
Boolean	outputactive
	[#989] 更多...

详细描述

宏定义说明

bestinsptr

#define bestinsptr

(

x

)

info(x+2) /* the optimum most recent insertion}*/

boxthere

#define boxthere   2

brokenins

#define brokenins

(

x

)

info(x+1) /* this insertion might break at |brokenptr|}*/

brokenptr

#define brokenptr

(

x

)

link(x+1)

[p367#981] an insertion for this class will break here if anywhere

contribtail

#define contribtail   (nest[0].tailfield) /*tail of the contribution list*/

[p371#995]

contribute

#define contribute   80

inserting

#define inserting   0

insertsonly

#define insertsonly   1

lastinsptr

#define lastinsptr

(

x

)

link(x+2) /* the most recent insertion for this |subtype|}*/

pagedepth

#define pagedepth   (pagesofar[7]) /*depth of the current page*/

pagegoal

#define pagegoal   (pagesofar[0])

[p368#982] desired height of information on page being built

pageinsnodesize

#define pageinsnodesize   4

pageshrink

#define pageshrink   (pagesofar[6]) /*shrinkability of the current page*/

pagetotal

#define pagetotal   (pagesofar[1]) /*height of the current page*/

setpagesofarzero

#define setpagesofarzero

(

x

)

(pagesofar[(x)] = 0)

[p369#987]

splitup

#define splitup   1

函数说明

_new_cur_page()

static void _new_cur_page ( )

static

[#991] page builder init

boxerror()

void boxerror

(

EightBits

n

)

buildpage()

void buildpage

(

void

)

ensurevbox()

void ensurevbox

(

EightBits

n

)

fireup()

void fireup

(

HalfWord

c

)

freezepagespecs()

void freezepagespecs

(

SmallNumber

s

)

page_builder_init()

void page_builder_init

(

)

[#990, #991]

[#990]

[#991]

page_builder_init_once()

void page_builder_init_once

(

)

[#981, #988]

#981

#988

printtotals()

void printtotals

(

void

)

变量说明

bestpagebreak

Pointer bestpagebreak

[#980] break here to get the best page known so far

bestsize

Scaled bestsize

[#980] its page goal

insertpenalties

Integer insertpenalties

lastglue

Pointer lastglue

lastkern

Scaled lastkern

lastpenalty

Integer lastpenalty

leastpagecost

Integer leastpagecost

[#980] the score for this currently best page

outputactive

Boolean outputactive

[#989]

pagecontents

char pagecontents

[#980] what is on the current page so far?

pagemaxdepth

Scaled pagemaxdepth

[#980] maximum box depth on page being built

pagesofar

Scaled pagesofar[8]

[#982]

pagetail

Pointer pagetail

[#980] the final node on the current page