+++ /dev/null
-% Change file for GNU Pascal and Linux
-% (by Don Knuth, 2000; see ../tex-sparc for the prehistory)
-% (I'm no longer keeping the "efficiency" changes; just enuf for TRIP test)
-%
-% Use this file as is to make an INITEX. To get triptex, use the
-% shell script ``ini_to_trip'' and re-TANGLE.
-
-% History:
-% 2000.04.30 first sketch --- untested --- see FIXTHIS for parts not done yet
-
-% NOTE: the module numbers in this change file refer to Volume B.
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [0] WEAVE: only print changes
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-\def\botofcontents{\vskip 0pt plus 1fil minus 1.5in}
-@y
-\def\botofcontents{\vskip 0pt plus 1fil minus 1.5in}
-\let\maybe=\iffalse
-\def\title{\TeX82 changes for GNU Pascal}
-\def\glob{13}\def\gglob{20, 26} % these are defined in module 1
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [1.2] banner line
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@d banner=='This is TeX, Version 3.14159' {printed when \TeX\ starts}
-@y
-@d banner=='This is '#27'[33;1mNesTeX'#27'[0m, Version 3.14159 for '#27'[31;1mJava'#27'[0m'
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [1.7] debug..gubed, stat..tats
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@d debug==@{ {change this to `$\\{debug}\equiv\null$' when debugging}
-@d gubed==@t@>@} {change this to `$\\{gubed}\equiv\null$' when debugging}
-@y
-@d debug==@{ {the trip test will use debugging}
-@d gubed==@t@>@}
-@z
-@x
-@d stat==@{ {change this to `$\\{stat}\equiv\null$' when gathering
- usage statistics}
-@d tats==@t@>@} {change this to `$\\{tats}\equiv\null$' when gathering
- usage statistics}
-@y
-@d stat==
-@d tats==
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [1.8] init..tini
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@d init== {change this to `$\\{init}\equiv\.{@@\{}$' in the production version}
-@d tini== {change this to `$\\{tini}\equiv\.{@@\}}$' in the production version}
-@y
-@d init==
-@d tini==
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [1.10] othercases, feature of ISO Extended Pascal
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@d othercases == others: {default for cases not listed explicitly}
-@y
-@d othercases == otherwise {default for cases not listed explicitly}
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [1.11] compile-time constants
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@!mem_max=30000; {greatest index in \TeX's internal |mem| array;
- must be strictly less than |max_halfword|;
- must be equal to |mem_top| in \.{INITEX}, otherwise |>=mem_top|}
-@!mem_min=0; {smallest index in \TeX's internal |mem| array;
- must be |min_halfword| or more;
- must be equal to |mem_bot| in \.{INITEX}, otherwise |<=mem_bot|}
-@!buf_size=500; {maximum number of characters simultaneously present in
- current lines of open files and in control sequences between
- \.{\\csname} and \.{\\endcsname}; must not exceed |max_halfword|}
-@!error_line=72; {width of context lines on terminal error messages}
-@!half_error_line=42; {width of first lines of contexts in terminal
- error messages; should be between 30 and |error_line-15|}
-@!max_print_line=79; {width of longest text lines output; should be at least 60}
-@!stack_size=200; {maximum number of simultaneous input sources}
-@!max_in_open=6; {maximum number of input files and error insertions that
- can be going on simultaneously}
-@!font_max=75; {maximum internal font number; must not exceed |max_quarterword|
- and must be at most |font_base+256|}
-@!font_mem_size=20000; {number of words of |font_info| for all fonts}
-@!param_size=60; {maximum number of simultaneous macro parameters}
-@!nest_size=40; {maximum number of semantic levels simultaneously active}
-@!max_strings=3000; {maximum number of strings; must not exceed |max_halfword|}
-@!string_vacancies=8000; {the minimum number of characters that should be
- available for the user's control sequences and font names,
- after \TeX's own error messages are stored}
-@!pool_size=32000; {maximum number of characters in strings, including all
- error messages and help texts, and the names of all fonts and
- control sequences; must exceed |string_vacancies| by the total
- length of \TeX's own strings, which is currently about 23000}
-@!save_size=600; {space for saving values outside of current group; must be
- at most |max_halfword|}
-@!trie_size=8000; {space for hyphenation patterns; should be larger for
- \.{INITEX} than it is in production versions of \TeX}
-@!trie_op_size=500; {space for ``opcodes'' in the hyphenation patterns}
-@!dvi_buf_size=800; {size of the output buffer; must be a multiple of 8}
-@!file_name_size=40; {file names shouldn't be longer than this}
-@!pool_name='TeXformats:TEX.POOL ';
- {string of length |file_name_size|; tells where the string pool appears}
-@y
-@!mem_max=300000; {greatest index in \TeX's internal |mem| array;
- must be strictly less than |max_halfword|;
- must be equal to |mem_top| in \.{INITEX}, otherwise |>=mem_top|}
-@!mem_min=0; {smallest index in \TeX's internal |mem| array;
- must be |min_halfword| or more;
- must be equal to |mem_bot| in \.{INITEX}, otherwise |<=mem_bot|}
-@!buf_size=5000; {maximum number of characters simultaneously present in
- current lines of open files and in control sequences between
- \.{\\csname} and \.{\\endcsname}; must not exceed |max_halfword|}
-@!error_line=79; {width of context lines on terminal error messages}
-@!half_error_line=50; {width of first lines of contexts in terminal
- error messages; should be between 30 and |error_line-15|}
-@!max_print_line=79; {width of longest text lines output; should be at least 60}
-@!stack_size=200; {maximum number of simultaneous input sources}
-@!max_in_open=15; {maximum number of input files and error insertions that
- can be going on simultaneously}
-@!font_max=127; {maximum internal font number; must not exceed |max_quarterword|
- and must be at most |font_base+256|}
-@!font_mem_size=40000; {number of words of |font_info| for all fonts}
-@!param_size=60; {maximum number of simultaneous macro parameters}
-@!nest_size=40; {maximum number of semantic levels simultaneously active}
-@!max_strings=30000; {maximum number of strings; must not exceed |max_halfword|}
-@!string_vacancies=8000; {the minimum number of characters that should be
- available for the user's control sequences and font names,
- after \TeX's own error messages are stored}
-@!pool_size=100000; {maximum number of characters in strings, including all
- error messages and help texts, and the names of all fonts and
- control sequences; must exceed |string_vacancies| by the total
- length of \TeX's own strings, which is currently about 23000}
-@!save_size=6000; {space for saving values outside of current group; must be
- at most |max_halfword|}
-@!trie_size=30000; {space for hyphenation patterns; should be larger for
- \.{INITEX} than it is in production versions of \TeX}
-@!trie_op_size=500; {space for ``opcodes'' in the hyphenation patterns}
-@!dvi_buf_size=800; {size of the output buffer; must be a multiple of 8}
-@!file_name_size=1024; {file names shouldn't be longer than this}
-@!pool_name='tex.pool';
- {string of length |file_name_size|; the string pool name}
-@.TeXformats@>
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [1.12] sensitive compile-time constants
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@d mem_bot=0 {smallest index in the |mem| array dumped by \.{INITEX};
- must not be less than |mem_min|}
-@d mem_top==30000 {largest index in the |mem| array dumped by \.{INITEX};
- must be substantially larger than |mem_bot|
- and not greater than |mem_max|}
-@d font_base=0 {smallest internal font number; must not be less
- than |min_quarterword|}
-@d hash_size=2100 {maximum number of control sequences; it should be at most
- about |(mem_max-mem_min)/10|}
-@d hash_prime=1777 {a prime number equal to about 85\pct! of |hash_size|}
-@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
-@y
-@d mem_bot=0 {smallest index in the |mem| array dumped by \.{INITEX};
- must not be less than |mem_min|}
-@d mem_top==300000 {largest index in the |mem| array dumped by \.{INITEX};
- must be substantially larger than |mem_bot|
- and not greater than |mem_max|}
-@d font_base=0 {smallest internal font number; must not be less
- than |min_quarterword|}
-@d hash_size=10000 {maximum number of control sequences; it should be at most
- about |(mem_max-mem_min)/10|}
-@d hash_prime=3443 {a prime number equal to about 85\pct! of |hash_size|}
-@d hyph_size=307 {another prime; the number of \.{\\hyphenation} exceptions}
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [2.23] allow any character that we can input to get in
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-for i:=0 to @'37 do xchr[i]:=' ';
-for i:=@'177 to @'377 do xchr[i]:=' ';
-@y
-for i:=0 to @'37 do xchr[i]:=chr(i);
-for i:=@'177 to @'377 do xchr[i]:=chr(i);
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [3.25] file types
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@!eight_bits=0..255; {unsigned one-byte quantity}
-@!alpha_file=packed file of text_char; {files that contain textual data}
-@y
-@!eight_bits=ByteCard; {unsigned one-byte quantity}
-@!alpha_file=t@&e@&x@&t; {files that contain textual data}
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [3.27] file opening
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@ The \ph\ compiler with which the present version of \TeX\ was prepared has
-extended the rules of \PASCAL\ in a very convenient way. To open file~|f|,
-we can write
-$$\vbox{\halign{#\hfil\qquad&#\hfil\cr
-|reset(f,@t\\{name}@>,'/O')|&for input;\cr
-|rewrite(f,@t\\{name}@>,'/O')|&for output.\cr}}$$
-The `\\{name}' parameter, which is of type `{\bf packed array
-$[\langle\\{any}\rangle]$ of \\{char}}', stands for the name of
-the external file that is being opened for input or output.
-Blank spaces that might appear in \\{name} are ignored.
-
-The `\.{/O}' parameter tells the operating system not to issue its own
-error messages if something goes wrong. If a file of the specified name
-cannot be found, or if such a file cannot be opened for some other reason
-(e.g., someone may already be trying to write the same file), we will have
-|@!erstat(f)<>0| after an unsuccessful |reset| or |rewrite|. This allows
-\TeX\ to undertake appropriate corrective action.
-@:PASCAL H}{\ph@>
-@^system dependencies@>
-
-\TeX's file-opening procedures return |false| if no file identified by
-|name_of_file| could be opened.
-
-@d reset_OK(#)==erstat(#)=0
-@d rewrite_OK(#)==erstat(#)=0
-
-@p function a_open_in(var f:alpha_file):boolean;
- {open a text file for input}
-begin reset(f,name_of_file,'/O'); a_open_in:=reset_OK(f);
-end;
-@#
-function a_open_out(var f:alpha_file):boolean;
- {open a text file for output}
-begin rewrite(f,name_of_file,'/O'); a_open_out:=rewrite_OK(f);
-end;
-@#
-function b_open_in(var f:byte_file):boolean;
- {open a binary file for input}
-begin reset(f,name_of_file,'/O'); b_open_in:=reset_OK(f);
-end;
-@#
-function b_open_out(var f:byte_file):boolean;
- {open a binary file for output}
-begin rewrite(f,name_of_file,'/O'); b_open_out:=rewrite_OK(f);
-end;
-@#
-function w_open_in(var f:word_file):boolean;
- {open a word file for input}
-begin reset(f,name_of_file,'/O'); w_open_in:=reset_OK(f);
-end;
-@#
-function w_open_out(var f:word_file):boolean;
- {open a word file for output}
-begin rewrite(f,name_of_file,'/O'); w_open_out:=rewrite_OK(f);
-end;
-@y
-@ An external C procedure, |test_access| is used to check whether or not the
-open will work. It is declared in the ``ext.h'' include file, and it returns
-|true| or |false|. The |Trim(name_of_file)| global holds the file name whose access
-is to be tested.
-The first parameter for |test_access| is the access mode,
-one of |read_access_mode| or |write_access_mode|.
-
-We also implement path searching in |test_access|: its second parameter is
-one of the ``file path'' constants defined below. If |Trim(name_of_file)|
-doesn't start with |'/'| then |test_access| tries prepending pathnames
-from the appropriate path list until success or the end of path list
-is reached.
-On return, |Trim(name_of_file)| contains the original name with the path
-that succeeded (if any) prepended. It is the name used in the various
-open procedures.
-
-Note that |a_open_in| has been redefined to take an additional argument,
-which should be one of the ``file path'' specifiers.
-Since |b_open_in| is only used for \.{TFM} files, and
-|w_open_in| is only used for format files, we don't need a path specifying
-argument for them.
-Path searching is not done for output files.
-
-@d read_access_mode=4 {``read'' mode for |test_access|}
-@d write_access_mode=2 {``write'' mode for |test_access|}
-
-@d no_file_path=0 {no path searching should be done}
-@d input_file_path=1 {path specifier for \.{\\input} files}
-@d read_file_path=2 {path specifier for \.{\\read} files}
-@d font_file_path=3 {path specifier for \.{TFM} files}
-@d format_file_path=4 {path specifier for format files}
-@d pool_file_path=5 {path specifier for the pool file}
-
-@p function a_open_in(var f:alpha_file):boolean;
- {open a text file for input}
-var str:String;
-begin
-reset(f,name_of_file);
-a_open_in:=IOResult=0;
-end;
-
-
-
-@#
-function a_open_out(var f:alpha_file):boolean;
- {open a text file for output}
-var @!ok:boolean;
-begin
- rewrite(f,Trim(name_of_file));
-a_open_out:=true;
-end;
-@#
-function b_open_in(var f:byte_file):boolean;
- {open a binary file for input}
-var @!ok:boolean;
-begin
- reset(f,Trim(name_of_file));
-b_open_in:=true;
-end;
-@#
-function b_open_out(var f:byte_file):boolean;
- {open a binary file for output}
-var @!ok:boolean;
-begin
- rewrite(f,Trim(name_of_file));
-b_open_out:=true;
-end;
-@#
-function w_open_in(var f:word_file):boolean;
- {open a word file for input}
-var @!ok:boolean;
-begin
- reset(f,Trim(name_of_file));
-w_open_in:=true;
-end;
-@#
-function w_open_out(var f:word_file):boolean;
- {open a word file for output}
-var @!ok:boolean;
-begin
- rewrite(f,Trim(name_of_file));
-w_open_out:=true;
-end;
-@z
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [3.32] term_in/out are input,output
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@!term_in:alpha_file; {the terminal as an input file}
-@!term_out:alpha_file; {the terminal as an output file}
-
-@y
-@!{the terminal as an input file}
-
-@z
-
-@x
-@d t_open_in==reset(term_in,'TTY:','/O/I') {open the terminal for text input}
-@d t_open_out==rewrite(term_out,'TTY:','/O') {open the terminal for text output}
-@y
-@d term_in==Input
-@d term_out==Output
-@d t_open_in==do_nothing
-@d t_open_out==do_nothing
-@z
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [3.34] flushing output
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-these operations can be specified in \ph:
-@^system dependencies@>
-
-@d update_terminal == break(term_out) {empty the terminal output buffer}
-@d clear_terminal == break_in(term_in,true) {clear the terminal input buffer}
-@d wake_up_terminal == do_nothing {cancel the user's cancellation of output}
-@y
-these operations can be specified with Berkeley {\mc UNIX}:
-@^system dependencies@>
-
-@d update_terminal == {nothing necessary on UNIX}
-@d clear_terminal == {nothing necessary on UNIX}
-@d wake_up_terminal == {nothing necessary on UNIX}
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [4.38] string data
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@!packed_ASCII_code = 0..255; {elements of |str_pool| array}
-@y
-@!packed_ASCII_code = ByteCard; {elements of |str_pool| array}
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [4.51,52,53] make TEX.POOL lowercase in messages
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-else bad_pool('! I can''t read TEX.POOL.')
-@y
-else bad_pool('! I can''t read tex.pool.')
-@z
-@x
-begin if eof(pool_file) then bad_pool('! TEX.POOL has no check sum.');
-@y
-begin if eof(pool_file) then bad_pool('! tex.pool has no check sum.');
-@z
-@x
- bad_pool('! TEX.POOL line doesn''t begin with two digits.');
-@y
- bad_pool('! tex.pool line doesn''t begin with two digits.');
-@z
-@x
- bad_pool('! TEX.POOL check sum doesn''t have nine digits.');
-@y
- bad_pool('! tex.pool check sum doesn''t have nine digits.');
-@z
-@x
-done: if a<>@$ then bad_pool('! TEX.POOL doesn''t match; TANGLE me again.');
-@y
-done: if a<>@$ then bad_pool('! tex.pool doesn''t match; tangle me again.');
-@z
-
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [8.110] ranges for quarter,half words FIXTHIS
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@d min_quarterword=0 {smallest allowable value in a |quarterword|}
-@d max_quarterword=255 {largest allowable value in a |quarterword|}
-@d min_halfword==0 {smallest allowable value in a |halfword|}
-@d max_halfword==65535 {largest allowable value in a |halfword|}
-@y
-@d min_quarterword=-128 {smallest allowable value in a |quarterword|}
-@d max_quarterword=127 {largest allowable value in a |quarterword|}
-@d min_halfword==-2147483648 {smallest allowable value in a |halfword|}
-@d max_halfword==2147483647 {largest allowable value in a |halfword|}
-@z
-
-@x
-@<Types...@>=
-@!quarterword = min_quarterword..max_quarterword; {1/4 of a word}
-@!halfword=min_halfword..max_halfword; {1/2 of a word}
-@!two_choices = 1..2; {used when there are two variants in a record}
-@!four_choices = 1..4; {used when there are four variants in a record}
-@y
-@<Types...@>=
-@!quarterword = min_quarterword..max_quarterword; {1/4 of a word}
-@!halfword=min_halfword..max_halfword; {1/2 of a word}
-@!two_choices = 1..2; {used when there are two variants in a record}
-@!four_choices = 1..4; {used when there are four variants in a record}
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [11.165] fix the word "free" so that it doesn't conflict with a runtime proc
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-been included. (You may want to decrease the size of |mem| while you
-@^debugging@>
-are debugging.)
-@y
-been included. (You may want to decrease the size of |mem| while you
-@^debugging@>
-are debugging.)
-
-@d free==free_arr
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [12.186] glue_ratio fix FIXTHIS
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-floating point underflow on the author's computer.
-@^system dependencies@>
-@^dirty \PASCAL@>
-
-@<Display the value of |glue_set(p)|@>=
-g:=float(glue_set(p));
-if (g<>float_constant(0))and(glue_sign(p)<>normal) then
- begin print(", glue set ");
- if glue_sign(p)=shrinking then print("- ");
- if abs(mem[p+glue_offset].int)<@'4000000 then print("?.?")
- else if abs(g)>float_constant(20000) then
- begin if g>float_constant(0) then print_char(">")
- else print("< -");
- print_glue(20000*unity,glue_order(p),0);
- end
- else print_glue(round(unity*g),glue_order(p),0);
-@^real multiplication@>
- end
-@y
-floating point underflow on the author's computer.
-For the {\mc VAX}, the only possible random value that could hurt is
-a reserved value with 1 in the sign bit and 0 for the (excess) exponent.
-Because the sign-plus-exponent is in the middle of the word, the chances
-of this happening are miniscule, and ignored here.
-@^system dependencies@>
-@^dirty \PASCAL@>
-
-@<Display the value of |glue_set(p)|@>=
-g:=float(glue_set(p));
-if (g<>float_constant(0))and(glue_sign(p)<>normal) then
- begin print(", glue set ");
- if glue_sign(p)=shrinking then print("- ");
- if abs(float(glue_set(p)))>20000.0 then
- begin if float(glue_set(p))>0 then print_char(">")
- else print("< -");
- print_glue(20000*unity,glue_order(p),0);
- end
- else print_glue(round(float(glue_set(p))*unity),glue_order(p),0);
-@^real multiplication@>
- end
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [29.513] area and extension rules
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@ The file names we shall deal with for illustrative purposes have the
-following structure: If the name contains `\.>' or `\.:', the file area
-consists of all characters up to and including the final such character;
-otherwise the file area is null. If the remaining file name contains
-`\..', the file extension consists of all such characters from the first
-remaining `\..' to the end, otherwise the file extension is null.
-@^system dependencies@>
-
-We can scan such file names easily by using two global variables that keep track
-of the occurrences of area and extension delimiters:
-
-@<Glob...@>=
-@!area_delimiter:pool_pointer; {the most recent `\.>' or `\.:', if any}
-@!ext_delimiter:pool_pointer; {the relevant `\..', if any}
-@y
-@ The file names we shall deal with for SunOS have the
-following structure: If the name contains `\./', the file area
-consists of all characters up to and including the final such character;
-otherwise the file area is null. If the remaining file name contains
-`\..', the file extension consists of all such characters from the first
-remaining `\..' to the end, otherwise the file extension is null.
-@^system dependencies@>
-
-We can scan such file names easily by using two global variables that keep
-track of the occurrences of area and extension delimiters:
-
-@<Glob...@>=
-@!area_delimiter:pool_pointer; {the most recent `\./', if any}
-@!ext_delimiter:pool_pointer; {the most recent `\..', if any}
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [29.516] more_name
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
- if (c=">")or(c=":") then
-@y
- if c="/" then
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [29.520] default format
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-@d format_default_length=20 {length of the |TEX_format_default| string}
-@d format_area_length=11 {length of its area part}
-@d format_ext_length=4 {length of its `\.{.fmt}' part}
-@y
-Under Linux we don't give the area part, instead depending
-on the path searching that will happen during file opening.
-
-@d format_default_length=9 {length of the |TEX_format_default| string}
-@d format_area_length=0 {length of its area part}
-@d format_ext_length=4 {length of its `\.{.fmt}' part}
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [29.521] plain format location
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-TEX_format_default:='TeXformats:plain.fmt';
-@y
-TEX_format_default:='plain.fmt';
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [29.524] format file opening: only try once, with path search
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
- pack_buffered_name(0,loc,j-1); {try first without the system file area}
- if w_open_in(fmt_file) then goto found;
- pack_buffered_name(format_area_length,loc,j-1);
- {now try the system format file area}
- if w_open_in(fmt_file) then goto found;
-@y
- pack_buffered_name(0,loc,j-1);
- if w_open_in(fmt_file) then goto found;
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [29.525] make_name_string
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-@x
-which simply makes a \TeX\ string from the value of |name_of_file|, should
-ideally be changed to deduce the full name of file~|f|, which is the file
-most recently opened, if it is possible to do this in a \PASCAL\ program.
-@^system dependencies@>
-
-This routine might be called after string memory has overflowed, hence
-we dare not use `|str_room|'.
-
-@p function make_name_string:str_number;
-var k:1..file_name_size; {index into |name_of_file|}
-begin if (pool_ptr+name_length>pool_size)or(str_ptr=max_strings)or
- (cur_length>0) then
- make_name_string:="?"
-else begin for k:=1 to name_length do append_char(xord[name_of_file[k]]);
- make_name_string:=make_string;
- end;
-end;
-@y
-which simply makes a \TeX\ string from the value of |name_of_file|, should
-ideally be changed to deduce the full name of file~|f|, which is the file
-most recently opened, if it is possible to do this in a \PASCAL\ program.
-With the Berkeley {\mc UNIX} version, we know that |name_of_file|
-contains |name_of_file| prepended with the directory name that was found
-by path searching.
-If |name_of_file| starts with |'./'|, we don't use that part of the
-name, since {\mc UNIX} users understand that.
-@^system dependencies@>
-
-This routine might be called after string memory has overflowed, hence
-we dare not use `|str_room|'.
-
-@p function make_name_string:str_number;
-var k,@!kstart:1..file_name_size; {index into |name_of_file|}
-begin
-k:=1;
-while (k<file_name_size) and (xord[name_of_file[k]]<>" ") do
- incr(k);
-name_length:=k-1; {the real |name_length|}
-if (pool_ptr+name_length>pool_size)or(str_ptr=max_strings)or
- (cur_length>0) then
- make_name_string:="?"
-else begin
- if (xord[name_of_file[1]]=".") and (xord[name_of_file[2]]="/") then
- kstart:=3
- else
- kstart:=1;
- for k:=kstart to name_length do append_char(xord[name_of_file[k]]);
- make_name_string:=make_string;
- end
-end;
-@z
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% [30.563] opening tfm file: now path searching is done
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-% Set temp_int to value of first byte
-@x
-@ @<Open |tfm_file| for input@>=
-file_opened:=false;
-if aire="" then pack_file_name(nom,TEX_font_area,".tfm")
-else pack_file_name(nom,aire,".tfm");
-if not b_open_in(tfm_file) then abort;
-file_opened:=true
-@y
-@ Here we have to ``prime the pump'' for the |temp_int| trick explained below.
-
- @<Open |tfm_file| for input@>=
-file_opened:=false;
-pack_file_name(nom,aire,".tfm");
-if not b_open_in(tfm_file) then abort;
-begin
- var temp_int:integer;
- temp_int:=tfm_file^;
- if temp_int<0 then temp_int:=temp_int+256;
-end;
-file_opened:=true
-@z
-
projects / nestedvm.git / blobdiff