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authorKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
committerKarl Berry <karl@freefriends.org>2021-02-25 19:22:25 +0000
commitad547a6b5986815fda458221149728d9d9ab1d87 (patch)
tree16296910eb3eca724371474ea9aea3994dc69614 /Build/source/texk/web2c/pltotf.ch
parent947b43de3dd21d58ccc2ffadefc4441ea1c2a813 (diff)
restore Build,TODO from r57911
git-svn-id: svn://tug.org/texlive/trunk@57915 c570f23f-e606-0410-a88d-b1316a301751
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+% pltotf.ch for C compilation with web2c.
+%
+% 04/04/83 (PC) Original version, made to work with version 1.2 of PLtoTF.
+% 04/16/83 (PC) Brought up to version 1.3 of PLtoTF.
+% 06/30/83 (HWT) Revised changefile format for version 1.7 Tangle
+% 07/28/83 (HWT) Brought up to version 2
+% 12/19/86 (ETM) Brought up to version 2.1
+% 07/05/87 (ETM) Brought up to version 2.3
+% 03/22/88 (ETM) Converted for use with WEB to C
+% 11/29/89 (KB) Version 3.
+% 01/16/90 (SR) Version 3.2.
+% (more recent changes in the ChangeLog)
+
+@x [0] WEAVE: print changes only.
+\pageno=\contentspagenumber \advance\pageno by 1
+@y
+\pageno=\contentspagenumber \advance\pageno by 1
+\let\maybe=\iffalse
+\def\title{PL$\,$\lowercase{to}$\,$TF changes for C}
+@z
+
+@x [1] Define my_name
+@d banner=='This is PLtoTF, Version 3.6' {printed when the program starts}
+@y
+@d my_name=='pltotf'
+@d banner=='This is PLtoTF, Version 3.6' {printed when the program starts}
+@z
+
+@x [2] Print all terminal output on stderr.
+@d print(#)==write(#)
+@d print_ln(#)==write_ln(#)
+@y
+@d print(#)==write(stderr,#)
+@d print_ln(#)==write_ln(stderr,#)
+@d print_real(#)==fprint_real(stderr,#)
+@z
+
+@x [still 2] No banner unless verbose.
+procedure initialize; {this procedure gets things started properly}
+ var @<Local variables for initialization@>@/
+ begin print_ln(banner);@/
+@y
+@<Define |parse_arguments|@>
+procedure initialize; {this procedure gets things started properly}
+ var @<Local variables for initialization@>@/
+ begin kpse_set_program_name (argv[0], my_name);
+ parse_arguments;
+@z
+
+@x [3] Larger constants.
+@!buf_size=60; {length of lines displayed in error messages}
+@!max_header_bytes=100; {four times the maximum number of words allowed in
+ the \.{TFM} file header block, must be 1024 or less}
+@!max_param_words=30; {the maximum number of \.{fontdimen} parameters allowed}
+@!max_lig_steps=5000;
+ {maximum length of ligature program, must be at most $32767-257=32510$}
+@!max_kerns=500; {the maximum number of distinct kern values}
+@!hash_size=5003; {preferably a prime number, a bit larger than the number
+ of character pairs in lig/kern steps}
+@y
+@!buf_size=3000; {length of lines displayed in error messages}
+@!max_header_bytes=1000; {four times the maximum number of words allowed in
+ the \.{TFM} file header block, must be 1024 or less}
+@!max_param_words=254; {the maximum number of \.{fontdimen} parameters allowed}
+@!max_lig_steps=32510;
+ {maximum length of ligature program, must be at most $32767-257=32510$}
+@!max_kerns=5000; {the maximum number of distinct kern values}
+@!hash_size=32579; {preferably a prime number, a bit larger than the number
+ of character pairs in lig/kern steps}
+@z
+
+@x [6] Open PL file.
+reset(pl_file);
+@y
+reset (pl_file, pl_name);
+if verbose then begin
+ print (banner);
+ print_ln (version_string);
+end;
+@z
+
+@x [16] Open TFM file.
+@ On some systems you may have to do something special to write a
+packed file of bytes. For example, the following code didn't work
+when it was first tried at Stanford, because packed files have to be
+opened with a special switch setting on the \PASCAL\ that was used.
+@^system dependencies@>
+
+@<Set init...@>=
+rewrite(tfm_file);
+@y
+@ On some systems you may have to do something special to write a
+packed file of bytes. It's no problem in C.
+@^system dependencies@>
+
+@<Set init...@>=
+rewritebin (tfm_file, tfm_name);
+@z
+
+@x [18] Pascal Web's char
+@d first_ord=0 {ordinal number of the smallest element of |char|}
+@y
+@d char == 0..255
+@d first_ord=0 {ordinal number of the smallest element of |char|}
+@z
+
+@x [25] Non-zero return code in case of problems.
+@!chars_on_line:0..8; {the number of characters printed on the current line}
+@y
+@!chars_on_line:0..8; {the number of characters printed on the current line}
+@!perfect:boolean; {was the file free of errors?}
+@z
+
+@x [26] Non-zero return code in case of problems.
+chars_on_line:=0;
+@y
+chars_on_line:=0;
+perfect:=true; {innocent until proved guilty}
+@z
+
+@x [27] Non-zero return code in case of problems.
+chars_on_line:=0;
+@y
+chars_on_line:=0;
+perfect:=false;
+@z
+
+@x [79] `index' might be a library routine.
+|k|th element of its list.
+@y
+|k|th element of its list.
+@d index == index_var
+@z
+
+@x [103] No output (except errors) unless verbose.
+@<Print |c| in octal notation@>;
+@y
+if verbose then @<Print |c| in octal notation@>;
+@z
+
+@x [115] Output of reals.
+@ @d round_message(#)==if delta>0 then print_ln('I had to round some ',
+@.I had to round...@>
+ #,'s by ',(((delta+1) div 2)/@'4000000):1:7,' units.')
+@y
+@ @d round_message(#)==if delta>0 then begin print('I had to round some ',
+@.I had to round...@>
+ #,'s by '); print_real((((delta+1) div 2)/@'4000000),1,7);
+ print_ln(' units.'); end
+@z
+
+% [118] Change the name of the variable `class', since AIX 3.1's <math.h>
+% defines a function by that name.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+@d pending=4 {$f(x,y)$ is being evaluated}
+@y
+@d pending=4 {$f(x,y)$ is being evaluated}
+@d class == class_var {Avoid problems with AIX \.{<math.h>}}
+@z
+
+% [123] web2c can't handle these mutually recursive procedures.
+% But let's do a fake definition of f here, so that it gets into web2c's
+% symbol table...
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+@p function f(@!h,@!x,@!y:indx):indx; forward;@t\2@>
+ {compute $f$ for arguments known to be in |hash[h]|}
+@y
+@p
+ifdef('notdef')
+function f(@!h,@!x,@!y:indx):indx; begin end;@t\2@>
+ {compute $f$ for arguments known to be in |hash[h]|}
+endif('notdef')
+@z
+
+% [124] ... and then really define it now.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+@p function f;
+@y
+@p function f(@!h,@!x,@!y:indx):indx;
+@z
+
+@x [127] Fix up output of bytes.
+@d out(#)==write(tfm_file,#)
+@y
+@d out(#)==putbyte(#,tfm_file)
+@z
+
+% [130] web2c extends the range of 'lf' from 0..32767 into
+% short (-32768..32767), but the overflow here ends up in
+% Bad metric (TFM) file. So we add test here.
+@x
+lf:=6+lh+(ec-bc+1)+memory[width]+memory[height]+memory[depth]+
+memory[italic]+nl+lk_offset+nk+ne+np;
+@y
+lf:=6+lh+(ec-bc+1)+memory[width]+memory[height]+memory[depth]+
+memory[italic]+nl+lk_offset+nk+ne+np;
+if lf<0 then begin
+ print_ln('The total number of words in the TFM file too large!');
+ uexit(1);
+ end
+@z
+
+@x [136] Fix output of reals.
+@p procedure out_scaled(x:fix_word); {outputs a scaled |fix_word|}
+var @!n:byte; {the first byte after the sign}
+@!m:0..65535; {the two least significant bytes}
+begin if abs(x/design_units)>=16.0 then
+ begin print_ln('The relative dimension ',x/@'4000000:1:3,
+ ' is too large.');
+@.The relative dimension...@>
+ print(' (Must be less than 16*designsize');
+ if design_units<>unity then print(' =',design_units/@'200000:1:3,
+ ' designunits');
+@y
+@p procedure out_scaled(x:fix_word); {outputs a scaled |fix_word|}
+var @!n:byte; {the first byte after the sign}
+@!m:0..65535; {the two least significant bytes}
+begin if fabs(x/design_units)>=16.0 then
+ begin print('The relative dimension ');
+ print_real(x/@'4000000,1,3);
+ print_ln(' is too large.');
+@.The relative dimension...@>
+ print(' (Must be less than 16*designsize');
+ if design_units<>unity then begin print(' =');
+ print_real(design_units/@'200000,1,3);
+ print(' designunits');
+ end;
+@z
+
+@x [147] Be quiet unless verbose.
+read_input; print_ln('.');@/
+@y
+read_input;
+if verbose then print_ln('.');
+@z
+
+@x [147] Non-zero return code in case of problems,
+end.
+@y
+if not perfect then uexit(1);
+end.
+@z
+
+@x [148] System-dependent changes.
+This section should be replaced, if necessary, by changes to the program
+that are necessary to make \.{PLtoTF} work at a particular installation.
+It is usually best to design your change file so that all changes to
+previous sections preserve the section numbering; then everybody's version
+will be consistent with the printed program. More extensive changes,
+which introduce new sections, can be inserted here; then only the index
+itself will get a new section number.
+@^system dependencies@>
+@y
+Parse a Unix-style command line.
+
+@d argument_is (#) == (strcmp (long_options[option_index].name, #) = 0)
+
+@<Define |parse_arguments|@> =
+procedure parse_arguments;
+const n_options = 3; {Pascal won't count array lengths for us.}
+var @!long_options: array[0..n_options] of getopt_struct;
+ @!getopt_return_val: integer;
+ @!option_index: c_int_type;
+ @!current_option: 0..n_options;
+begin
+ @<Initialize the option variables@>;
+ @<Define the option table@>;
+ repeat
+ getopt_return_val := getopt_long_only (argc, argv, '', long_options,
+ address_of (option_index));
+ if getopt_return_val = -1 then begin
+ do_nothing; {End of arguments; we exit the loop below.}
+
+ end else if getopt_return_val = "?" then begin
+ usage (my_name);
+
+ end else if argument_is ('help') then begin
+ usage_help (PLTOTF_HELP, nil);
+
+ end else if argument_is ('version') then begin
+ print_version_and_exit (banner, nil, 'D.E. Knuth', nil);
+
+ end; {Else it was a flag; |getopt| has already done the assignment.}
+ until getopt_return_val = -1;
+
+ {Now |optind| is the index of first non-option on the command line.
+ We must have one or two remaining arguments.}
+ if (optind + 1 <> argc) and (optind + 2 <> argc) then begin
+ write_ln (stderr, my_name, ': Need one or two file arguments.');
+ usage (my_name);
+ end;
+
+ pl_name := extend_filename (cmdline (optind), 'pl');
+
+ {If an explicit output filename isn't given, construct it from |pl_name|.}
+ if optind + 2 = argc then begin
+ tfm_name := extend_filename (cmdline (optind + 1), 'tfm');
+ end else begin
+ tfm_name := basename_change_suffix (pl_name, '.pl', '.tfm');
+ end;
+end;
+
+@ Here are the options we allow. The first is one of the standard GNU options.
+@.-help@>
+
+@<Define the option...@> =
+current_option := 0;
+long_options[current_option].name := 'help';
+long_options[current_option].has_arg := 0;
+long_options[current_option].flag := 0;
+long_options[current_option].val := 0;
+incr (current_option);
+
+@ Another of the standard options.
+@.-version@>
+
+@<Define the option...@> =
+long_options[current_option].name := 'version';
+long_options[current_option].has_arg := 0;
+long_options[current_option].flag := 0;
+long_options[current_option].val := 0;
+incr (current_option);
+
+@ Print progress information?
+
+@<Define the option...@> =
+long_options[current_option].name := 'verbose';
+long_options[current_option].has_arg := 0;
+long_options[current_option].flag := address_of (verbose);
+long_options[current_option].val := 1;
+incr (current_option);
+
+@ @<Glob...@> =
+@!verbose: c_int_type;
+
+@ @<Initialize the option...@> =
+verbose := false;
+
+@ An element with all zeros always ends the list.
+
+@<Define the option...@> =
+long_options[current_option].name := 0;
+long_options[current_option].has_arg := 0;
+long_options[current_option].flag := 0;
+long_options[current_option].val := 0;
+
+@ Global filenames.
+
+@<Global...@> =
+@!tfm_name,@!pl_name:const_c_string;
+@z