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/* mainbody.h
Copyright 2009 Taco Hoekwater <taco@luatex.org>
This file is part of LuaTeX.
LuaTeX is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your
option) any later version.
LuaTeX is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU General Public License along
with LuaTeX; if not, see <http://www.gnu.org/licenses/>. */
/* $Id: mainbody.h 3612 2010-04-13 09:29:42Z taco $ */
#ifndef MAINBODY_H
# define MAINBODY_H
extern int luatex_svn;
extern int luatex_version;
extern int luatex_revision;
extern int luatex_date_info;
extern const char *luatex_version_string;
extern const char *engine_name;
/*
The following parameters can be changed at compile time to extend or
reduce \TeX's capacity. They may have different values in \.{INITEX} and
in production versions of \TeX.
@.INITEX@>
@^system dependencies@>
*/
# define ssup_max_strings 262143
# define inf_max_strings 100000
# define sup_max_strings ssup_max_strings
# define inf_strings_free 100
# define sup_strings_free sup_max_strings
# define inf_buf_size 500
# define sup_buf_size 100000000
# define inf_nest_size 40
# define sup_nest_size 4000
# define inf_max_in_open 6
# define sup_max_in_open 127
# define inf_param_size 60
# define sup_param_size 6000
# define inf_save_size 600
# define sup_save_size 80000
# define inf_stack_size 200
# define sup_stack_size 30000
# define inf_dvi_buf_size 800
# define sup_dvi_buf_size 65536
# define sup_hash_extra sup_max_strings
# define inf_hash_extra 0
# define sup_ocp_list_size 1000000
# define inf_ocp_list_size 1000
# define sup_ocp_buf_size 100000000
# define inf_ocp_buf_size 1000
# define sup_ocp_stack_size 1000000
# define inf_ocp_stack_size 1000
# define inf_expand_depth 100
# define sup_expand_depth 1000000
# include <stdio.h>
/* Types in the outer block */
typedef int ASCII_code; /* characters */
typedef unsigned char eight_bits; /* unsigned one-byte quantity */
typedef FILE *alpha_file; /* files that contain textual data */
typedef FILE *byte_file; /* files that contain binary data */
typedef int str_number;
typedef int pool_pointer;
typedef unsigned char packed_ASCII_code;
typedef int scaled; /* this type is used for scaled integers */
typedef char small_number; /* this type is self-explanatory */
typedef float glue_ratio; /* one-word representation of a glue expansion factor */
typedef unsigned short quarterword;
typedef int halfword;
typedef unsigned char glue_ord; /* infinity to the 0, 1, 2, 3, or 4 power */
typedef unsigned short group_code; /* |save_level| for a level boundary */
typedef int internal_font_number; /* |font| in a |char_node| */
typedef int font_index; /* index into |font_info| */
typedef int save_pointer;
/*
Characters of text that have been converted to \TeX's internal form
are said to be of type |ASCII_code|, which is a subrange of the integers.
We are assuming that our runtime system is able to read and write UTF-8.
Some of the ASCII codes without visible characters have been given symbolic
names in this program because they are used with a special meaning.
*/
# define null_code '\0' /* ASCII code that might disappear */
# define carriage_return '\r' /* ASCII code used at end of line */
/* Global variables */
extern int bad; /* is some ``constant'' wrong? */
extern boolean luainit; /* are we using lua for initializations */
extern boolean tracefilenames; /* print file open-close info? */
extern boolean ini_version; /* are we \.{INITEX}? */
extern boolean dump_option;
extern boolean dump_line;
extern int bound_default;
extern char *bound_name;
extern int error_line;
extern int half_error_line;
extern int max_print_line;
extern int ocp_list_size;
extern int ocp_buf_size;
extern int ocp_stack_size;
extern int max_strings;
extern int strings_free;
extern int font_k;
extern int buf_size;
extern int stack_size;
extern int max_in_open;
extern int param_size;
extern int nest_size;
extern int save_size;
extern int expand_depth;
extern int parsefirstlinep;
extern int filelineerrorstylep;
extern int haltonerrorp;
extern boolean quoted_filename;
/*
In order to make efficient use of storage space, \TeX\ bases its major data
structures on a |memory_word|, which contains either a (signed) integer,
possibly scaled, or a (signed) |glue_ratio|, or a small number of
fields that are one half or one quarter of the size used for storing
integers.
If |x| is a variable of type |memory_word|, it contains up to four
fields that can be referred to as follows:
$$\vbox{\halign{\hfil#&#\hfil&#\hfil\cr
|x|&.|int|&(an |integer|)\cr
|x|&.|sc|\qquad&(a |scaled| integer)\cr
|x|&.|gr|&(a |glue_ratio|)\cr
|x.hh.lh|, |x.hh|&.|rh|&(two halfword fields)\cr
|x.hh.b0|, |x.hh.b1|, |x.hh|&.|rh|&(two quarterword fields, one halfword
field)\cr
|x.qqqq.b0|, |x.qqqq.b1|, |x.qqqq|&.|b2|, |x.qqqq.b3|\hskip-100pt
&\qquad\qquad\qquad(four quarterword fields)\cr}}$$
This is somewhat cumbersome to write, and not very readable either, but
macros will be used to make the notation shorter and more transparent.
The \PASCAL\ code below gives a formal definition of |memory_word| and
its subsidiary types, using packed variant records. \TeX\ makes no
assumptions about the relative positions of the fields within a word.
We are assuming 32-bit integers, a halfword must contain at least
32 bits, and a quarterword must contain at least 16 bits.
@^system dependencies@>
N.B.: Valuable memory space will be dreadfully wasted unless \TeX\ is compiled
by a \PASCAL\ that packs all of the |memory_word| variants into
the space of a single integer. This means, for example, that |glue_ratio|
words should be |short_real| instead of |real| on some computers. Some
\PASCAL\ compilers will pack an integer whose subrange is `|0..255|' into
an eight-bit field, but others insist on allocating space for an additional
sign bit; on such systems you can get 256 values into a quarterword only
if the subrange is `|-128..127|'.
The present implementation tries to accommodate as many variations as possible,
so it makes few assumptions. If integers having the subrange
`|min_quarterword..max_quarterword|' can be packed into a quarterword,
and if integers having the subrange `|min_halfword..max_halfword|'
can be packed into a halfword, everything should work satisfactorily.
It is usually most efficient to have |min_quarterword=min_halfword=0|,
so one should try to achieve this unless it causes a severe problem.
The values defined here are recommended for most 32-bit computers.
We cannot use the full range of 32 bits in a halfword, because we have
to allow negative values for potential backend tricks like web2c's
dynamic allocation, and parshapes pointers have to be able to store at
least twice the value |max_halfword| (see below). Therefore,
|max_halfword| is $2^{30}-1$
*/
# include "tex/memoryword.h"
# define min_quarterword 0 /*smallest allowable value in a |quarterword| */
# define max_quarterword 65535 /* largest allowable value in a |quarterword| */
# define min_halfword -0x3FFFFFFF /* smallest allowable value in a |halfword| */
# define max_halfword 0x3FFFFFFF
/* largest allowable value in a |halfword| */
/*
The following procedure, which is called just before \TeX\ initializes its
input and output, establishes the initial values of the date and time.
It calls a macro-defined |dateandtime| routine. |dateandtime| in turn is
also a C macro, which calls |get_date_and_time|, passing it the addresses of
the day, month, etc., so they can be set by the routine.
|get_date_and_time| also sets up interrupt catching if that
is conditionally compiled in the C code.
@^system dependencies@>
*/
# define fix_date_and_time() dateandtime(int_par(time_code),int_par(day_code),int_par(month_code),int_par(year_code))
extern int get_luatexsvn(void);
extern int get_luatexversion(void);
extern str_number get_luatexrevision(void);
extern int get_luatex_date_info(void);
extern int ready_already;
extern void main_body(void);
extern void close_files_and_terminate(void);
extern void final_cleanup(void);
extern void debug_help(void); /* routine to display various things */
extern int main_initialize(void);
/* lazy me */
# define get_cur_font() equiv(cur_font_loc)
# define zset_cur_font set_cur_font
#endif
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