宏定义
#define	OCTAL_TOKEN (othertoken + '\'')
	[#438] apostrophe, indicates an octal constant. 更多...

#define	HEX_TOKEN (othertoken + '"')
	[#438] double quote, indicates a hex constant. 更多...

#define	ALPHA_TOKEN (othertoken + '`')
	[#438] reverse apostrophe, precedes alpha constants. 更多...

#define	POINT_TOKEN (othertoken + '.')
	[#438] decimal point. 更多...

#define	CONTINENTAL_POINT_TOKEN (othertoken + ',')
	[#438] decimal point, Eurostyle. 更多...

#define	INFINITY 2147483647L
	[#445] the largest positive value that \( \rm\TeX\ \) knows. 更多...

#define	A_TOKEN (lettertoken + 'A')
	[#445] the smallest special hex digit. 更多...

#define	OTHER_A_TOKEN (othertoken + 'A')
	[#445] special hex digit of type otherchar. 更多...

#define	DEFAULT_RULE 26214
	[#463] 0.4 pt. 更多...

#define	INPUT_LINE_NO_CODE (GLUE_VAL + 1)
	[#416] `\inputlineno` 更多...

#define	BADNESS_CODE (GLUE_VAL + 2)
	[#416] `\badness` 更多...

#define	MAX_DIMEN 1073741823L
	[#421] \( 2^{30}-1 \) 更多...

#define	ZERO_TOKEN (othertoken + '0')
	[#445] zero, the smallest digit 更多...

#define	SCAN_NORMAL_DIMEN() scan_dimen(false, false, false)
	[#448] 更多...

枚举
enum	TokenLevel { INT_VAL , DIMEN_VAL , GLUE_VAL , MU_VAL , IDENT_VAL , TOK_VAL }
	[#410] 更多...

函数
void	scan_init ()
	[#439] 更多...

void	skip_spaces (void)
	[#406] Get the next non-blank non-call token. 更多...

void	skip_spaces_or_relax (void)
	[#404] Get the next non-blank non-relax non-call token. 更多...

void	scan_left_brace (void)
	[#403] when a left brace is supposed to be the next non-blank token. 更多...

void	scan_optional_equals (void)
	[#405] looks for an optional `=` sign preceded by optional spaces. 更多...

Boolean	scankeyword (StrNumber s)
	[#407] look for a given string. 更多...

static void	mu_error (void)
	[#408] sounds an alarm when mu and non-mu units are being switched. 更多...

void	scan_something_internal (SmallNumber level, Boolean negative)
	[#413] fetch an internal parameter. 更多...

void	scan_eight_bit_int (void)
	[#433] scan `register code = [0, 255]`, use scan_int. 更多...

void	scan_char_num (void)
	[#434] scan `character code = [0, 255]`, use scan_int. 更多...

void	scan_four_bit_int (void)
	[#435] scan `number = [0, 15]`, use scan_int. 更多...

void	scan_fifteen_bit_int (void)
	[#436] scan `mathchar = [0, 23767]`, use scan_int. 更多...

void	scan_twenty_seven_bit_int (void)
	[#437] scan `mathchar` = \( [0, 2^{27}−1] \), use scan_int. 更多...

void	scan_int (void)
	[#440] sets cur_val to an integer. 更多...

void	scan_dimen (Boolean mu, Boolean inf, Boolean shortcut)
	[#448] sets cur_val to a dimension. 更多...

void	scan_glue (SmallNumber level)
	[#461] sets cur_val to a glue spec pointer. 更多...

HalfWord	scan_rule_spec (void)
	[#463] returns a pointer to a rule node. 更多...

变量
Integer	cur_val
	[#410] value returned by numeric scanners. 更多...

SmallNumber	cur_val_level
	[#410] the "level" of this value. 更多...

SmallNumber	radix
	[#438] scan_int sets this to 8, 10, 16, or zero. 更多...

GlueOrd	cur_order
	[#447] order of INFINITY found by scan_dimen. 更多...

详细描述

宏定义说明

◆ A_TOKEN

#define A_TOKEN (lettertoken + 'A')

[#445] the smallest special hex digit.

◆ ALPHA_TOKEN

#define ALPHA_TOKEN (othertoken + '`')

[#438] reverse apostrophe, precedes alpha constants.

◆ BADNESS_CODE

#define BADNESS_CODE (GLUE_VAL + 2)

[#416] \badness

◆ CONTINENTAL_POINT_TOKEN

#define CONTINENTAL_POINT_TOKEN (othertoken + ',')

[#438] decimal point, Eurostyle.

◆ DEFAULT_RULE

#define DEFAULT_RULE 26214

[#463] 0.4 pt.

◆ HEX_TOKEN

#define HEX_TOKEN (othertoken + '"')

[#438] double quote, indicates a hex constant.

◆ INFINITY

#define INFINITY 2147483647L

[#445] the largest positive value that \( \rm\TeX\ \) knows.

◆ INPUT_LINE_NO_CODE

#define INPUT_LINE_NO_CODE (GLUE_VAL + 1)

[#416] \inputlineno

◆ MAX_DIMEN

#define MAX_DIMEN 1073741823L

[#421] \( 2^{30}-1 \)

◆ OCTAL_TOKEN

#define OCTAL_TOKEN (othertoken + '\'')

[#438] apostrophe, indicates an octal constant.

◆ OTHER_A_TOKEN

#define OTHER_A_TOKEN (othertoken + 'A')

[#445] special hex digit of type otherchar.

◆ POINT_TOKEN

#define POINT_TOKEN (othertoken + '.')

[#438] decimal point.

◆ SCAN_NORMAL_DIMEN

#define SCAN_NORMAL_DIMEN ( ) scan_dimen(false, false, false)

[#448]

◆ ZERO_TOKEN

#define ZERO_TOKEN (othertoken + '0')

[#445] zero, the smallest digit

枚举类型说明

◆ TokenLevel

enum TokenLevel

[#410]

枚举值
INT_VAL	integer values
DIMEN_VAL	dimension values
GLUE_VAL	glue specifications
MU_VAL	math glue specifications
IDENT_VAL	font identifier
TOK_VAL	token lists

函数说明

◆ mu_error()

static void mu_error ( void )

static

[#408] sounds an alarm when mu and non-mu units are being switched.

◆ scan_char_num()

void scan_char_num ( void )

[#434] scan character code = [0, 255], use scan_int.

xref[10]: 414, 935, 1030, 1038, 1123, 1124, 1151, 1154, 1224, 1232

◆ scan_dimen()

void scan_dimen	(	Boolean	mu,
		Boolean	inf,
		Boolean	shortcut
	)

[#448] sets cur_val to a dimension.

xref[6]: 410, 440, 447, 461, 462, 1061

< should the answer be negated?

< numerator of a fraction whose denominator is 2^16.

[#450] Local variables for dimension calculations

[#441] Get the next non-blank non-sign token; set negative appropriately

[#449] Fetch an internal dimension and goto attach sign, or fetch an internal integer

[#451] Coerce glue to a dimension.

[#452]

[#451]

[#453] Scan units and set cur_val to x · (cur val + f/2^16) where there are x sp per unit; goto attach sign if the units are internal

[#454] Scan for fil units; goto attach_fraction if found

[#455] Scan for units that are internal dimensions; goto attach sign with cur val set if found.

[#451] Coerce glue to a dimension.

[#558] The em width for cur_font.

[#559] The x-height for cur_font.

[#456] Scan for mu units and goto attach fraction.

[#443] Scan an optional space.

◆ scan_eight_bit_int()

void scan_eight_bit_int ( void )

[#433] scan register code = [0, 255], use scan_int.

xref[15]: 415, 420, 427, 505, 1079, 1082, 1099, 1110, 1224, 1226, 1227, 1237, 1241, 1247, 1296

◆ scan_fifteen_bit_int()

void scan_fifteen_bit_int ( void )

[#436] scan mathchar = [0, 23767], use scan_int.

xref[4]: 1151, 1154, 1165, 1224

◆ scan_four_bit_int()

void scan_four_bit_int ( void )

[#435] scan number = [0, 15], use scan_int.

xref[5]: 501, 577, 1234, 1275, 1350

◆ scan_glue()

void scan_glue ( SmallNumber level )

[#461] sets cur_val to a glue spec pointer.

xref[5]: 410, 782, 1060, 1228, 1238

◆ scan_init()

void scan_init ( )

[#439]

◆ scan_int()

void scan_int ( void )

[#440] sets cur_val to an integer.

xref[31]: 409, 410, 432, 433, 434, 435, 436, 437, 438, 447, 448, 461, 471, 503, 504, 509, 578, 1103, 1225, 1228, 1232, 1238, 1240, 1243, 1244, 1246, 1248, 1253, 1258, 1350, 1377

◆ scan_left_brace()

void scan_left_brace ( void )

[#403] when a left brace is supposed to be the next non-blank token.

xref[12]: 473, 645, 785, 934, 960, 1025, 1099, 1117, 1119, 1153, 1172, 1174

◆ scan_optional_equals()

void scan_optional_equals ( void )

[#405] looks for an optional = sign preceded by optional spaces.

\relax is not ignored here.

xerf[19]: 782, 1224, 1226, 1228, 1232, 1234, 1236, 1241, 1243, 1244, 1245, 1246, 1247, 1248, 1253, 1257, 1275, 1351

◆ scan_rule_spec()

HalfWord scan_rule_spec ( void )

[#463] returns a pointer to a rule node.

This routine is called just after \( \rm\TeX\ \) has seen \hrule or \vrule; therefore cur cmd will be either hrule or vrule. The idea is to store the default rule dimensions in the node, then to override them if height or width or depth specifications are found (in any order).

xref[2]: 1056, 1084

◆ scan_something_internal()

void scan_something_internal	(	SmallNumber	level,
		Boolean	negative
	)

[#413] fetch an internal parameter.

xref[9]: 409, 410, 432, 440, 449, 451, 455, 461, 465

◆ scan_twenty_seven_bit_int()

void scan_twenty_seven_bit_int ( void )

[#437] scan mathchar = \( [0, 2^{27}−1] \), use scan_int.

xref[3]: 1151, 1154, 1160

◆ scankeyword()

Boolean scankeyword ( StrNumber s )

[#407] look for a given string.

checks to see whether the next tokens of input match this string.

If a match is found, the characters are effectively removed from the input and true is returned. Otherwise false is returned, and the input is left essentially unchanged (except for the fact that some macros may have been expanded, etc.).

◆ skip_spaces()

void skip_spaces ( void )

[#406] Get the next non-blank non-call token.

used in sections 405, 441, 455, 503, 526, 577, 785, 791, and 1045.

◆ skip_spaces_or_relax()

void skip_spaces_or_relax ( void )

[#404] Get the next non-blank non-relax non-call token.

\( \rm\TeX\ \) allows \relax to appear before the left brace. used in sections 403, 1078, 1084, 1151, 1160, 1211, 1226, and 1270.

变量说明

◆ cur_order

GlueOrd cur_order

[#447] order of INFINITY found by scan_dimen.

◆ cur_val

Integer cur_val

[#410] value returned by numeric scanners.

◆ cur_val_level

SmallNumber cur_val_level

[#410] the "level" of this value.

[INT_VAL=0, TOK_VAL=5]

◆ radix

SmallNumber radix

[#438] scan_int sets this to 8, 10, 16, or zero.