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+% tftopl.ch for C compilation with web2c.
+%
+% 04/04/83 (PC) Original version, made to work with version 1.0 of TFtoPL,
+% released with version 0.96 of TeX in February, 1983.
+% 04/16/83 (PC) Brought up to version 1.0 released with version 0.97 of TeX
+% in April, 1983.
+% 06/30/83 (HWT) Revised changefile format, for use with version 1.7 Tangle.
+% 07/28/83 (HWT) Brought up to version 2
+% 11/21/83 (HWT) Brought up to version 2.1
+% 03/24/84 (HWT) Brought up to version 2.2
+% 07/12/84 (HWT) Brought up to version 2.3
+% 07/05/87 (ETM) Brought up to version 2.5
+% 03/22/88 (ETM) Converted for use with WEB to C.
+% 11/30/89 (KB) Version 3.
+% 01/16/90 (SR) Version 3.1.
+% (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{TF\lowercase{to}PL changes for C}
+@z
+
+@x [2] Print all terminal output on stderr, so the pl can be sent to stdout.
+@d print(#)==write(#)
+@d print_ln(#)==write_ln(#)
+@y
+@d print(#)==write(stderr,#)
+@d print_ln(#)==write_ln(stderr,#)
+@z
+
+% [2] Fix files in program statement. We need to tell web2c about one
+% special variable. Perhaps it would be better to allow @define's
+% anywhere in a source file, but that seemed just as painful as this.
+@x
+@p program TFtoPL(@!tfm_file,@!pl_file,@!output);
+@y
+@p
+{Tangle doesn't recognize @@ when it's right after the \.=.}
+@\@= @@define var tfm;@>@\
+program TFtoPL(@!tfm_file,@!pl_file,@!output);
+@z
+
+@x [still 2] Don't print banner until later (and unless verbose).
+procedure initialize; {this procedure gets things started properly}
+ begin print_ln(banner);@/
+@y
+@<Define |parse_arguments|@>
+procedure initialize; {this procedure gets things started properly}
+ begin
+ kpse_set_progname (argv[0]);
+ kpse_init_prog ('TFTOPL', 0, nil, nil);
+ {We |xrealloc| when we know how big the file is. The 1000 comes
+ from the negative lower bound.}
+ tfm_file_array := cast_to_byte_pointer (xmalloc (1003));
+ parse_arguments;
+@z
+
+@x [5] Increase sizes to match vptovf.
+@!tfm_size=30000; {maximum length of |tfm| data, in bytes}
+@!lig_size=5000; {maximum length of |lig_kern| program, in words}
+@!hash_size=5003; {preferably a prime number, a bit larger than the number
+ of character pairs in lig/kern steps}
+@y
+@!tfm_size=150000; {maximum length of |tfm| data, in bytes}
+@!lig_size=32510; {maximum length of |lig_kern| program, in words ($<2^{15}$)}
+@!hash_size=32579; {preferably a prime number, a bit larger than the number
+ of character pairs in lig/kern steps}
+@z
+
+@x [7] Open the TFM file.
+@ On some systems you may have to do something special to read 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...@>=
+reset(tfm_file);
+@y
+@ On some systems you may have to do something special to read a
+packed file of bytes. With C under Unix, we just open the file by name
+and read characters from it.
+
+@<Set init...@>=
+tfm_file := kpse_open_file (tfm_name, kpse_tfm_format);
+if verbose then begin
+ print (banner);
+ print_ln (version_string);
+end;
+@z
+
+@x [17] Open the PL file.
+@ @<Set init...@>=
+rewrite(pl_file);
+@y
+@ If an explicit filename isn't given, we write to |stdout|.
+
+@<Set init...@>=
+if optind + 1 = argc then begin
+ pl_file := stdout;
+end else begin
+ pl_name := extend_filename (cmdline (optind + 1), 'pl');
+ rewrite (pl_file, pl_name);
+end;
+@z
+
+@x [18,19] Make |tfm| be dynamically allocated, and rename `index'.
+@<Types...@>=
+@!byte=0..255; {unsigned eight-bit quantity}
+@!index=0..tfm_size; {address of a byte in |tfm|}
+
+@ @<Glob...@>=
+@!tfm:array [-1000..tfm_size] of byte; {the input data all goes here}
+@y
+@d index == index_type
+
+@<Types...@>=
+@!byte=0..255; {unsigned eight-bit quantity}
+@!index=integer; {address of a byte in |tfm|}
+
+@ @<Glob...@>=
+{Kludge here to define |tfm| as a macro which takes care of the negative
+ lower bound. We've defined |tfm| for the benefit of web2c above.}
+@=#define tfm (tfmfilearray + 1001);@>@\
+@!tfm_file_array: pointer_to_byte; {the input data all goes here}
+@z
+
+@x [20] Allow arbitrarily large input files.
+if 4*lf-1>tfm_size then abort('The file is bigger than I can handle!');
+@.The file is bigger...@>
+@y
+tfm_file_array
+ := cast_to_byte_pointer (xrealloc (tfm_file_array, 4 * lf - 1 + 1002));
+@z
+
+% [20] Both nl and lig_size are in words, so the multiplication is not
+% needed. Found by "C.M. Connelly" <c@eskimo.com> and
+% Melissa O'Neill <oneill@cs.sfu.ca>
+@x
+if nl>4*lig_size then
+@y
+if nl>lig_size then
+@z
+
+% [27, 28] Change strings to C char pointers. The Pascal strings are
+% indexed starting at 1, so we pad with a blank.
+@x
+@!ASCII_04,@!ASCII_10,@!ASCII_14: packed array [1..32] of char;
+ {strings for output in the user's external character set}
+@!MBL_string,@!RI_string,@!RCE_string:packed array [1..3] of char;
+ {handy string constants for |face| codes}
+@y
+@!ASCII_04,@!ASCII_10,@!ASCII_14: c_string;
+ {strings for output in the user's external character set}
+@!ASCII_all: packed array[0..256] of char;
+@!MBL_string,@!RI_string,@!RCE_string: c_string;
+ {handy string constants for |face| codes}
+@z
+
+@x
+ASCII_04:=' !"#$%&''()*+,-./0123456789:;<=>?';@/
+ASCII_10:='@@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_';@/
+ASCII_14:='`abcdefghijklmnopqrstuvwxyz{|}~ ';@/
+MBL_string:='MBL'; RI_string:='RI '; RCE_string:='RCE';
+@y
+ASCII_04:=' !"#$%&''()*+,-./0123456789:;<=>?';@/
+ASCII_10:=' @@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_';@/
+ASCII_14:=' `abcdefghijklmnopqrstuvwxyz{|}~ ';@/
+strcpy (ASCII_all, ASCII_04);
+strcat (ASCII_all, '@@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_');
+strcat (ASCII_all, '`abcdefghijklmnopqrstuvwxyz{|}~');@/
+MBL_string:=' MBL'; RI_string:=' RI '; RCE_string:=' RCE';
+@z
+
+% [38] How we output the character code depends on |charcode_format|.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+begin if font_type>vanilla then
+ begin tfm[0]:=c; out_octal(0,1)
+ end
+else if (c>="0")and(c<="9") then
+ out(' C ',c-"0":1)
+else if (c>="A")and(c<="Z") then
+ out(' C ',ASCII_10[c-"A"+2])
+else if (c>="a")and(c<="z") then
+ out(' C ',ASCII_14[c-"a"+2])
+else begin tfm[0]:=c; out_octal(0,1);
+@y
+begin if (font_type > vanilla) or (charcode_format = charcode_octal) then
+ begin tfm[0]:=c; out_octal(0,1)
+ end
+else if (charcode_format = charcode_ascii) and (c > " ") and (c <= "~")
+ and (c <> "(") and (c <> ")") then
+ out(' C ', ASCII_all[c - " " + 1])
+{default case, use \.C only for letters and digits}
+else if (c>="0")and(c<="9") then
+ out(' C ',c-"0":1)
+else if (c>="A")and(c<="Z") then
+ out(' C ',ASCII_10[c-"A"+2])
+else if (c>="a")and(c<="z") then
+ out(' C ',ASCII_14[c-"a"+2])
+else begin tfm[0]:=c; out_octal(0,1);
+@z
+
+% [39] Don't output the face code as an integer.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+ out(MBL_string[1+(b mod 3)]);
+ out(RI_string[1+s]);
+ out(RCE_string[1+(b div 3)]);
+@y
+ put_byte(MBL_string[1+(b mod 3)], pl_file);
+ put_byte(RI_string[1+s], pl_file);
+ put_byte(RCE_string[1+(b div 3)], pl_file);
+@z
+
+@x [40] Force 32-bit constant arithmetic for 16-bit machines.
+f:=((tfm[k+1] mod 16)*@'400+tfm[k+2])*@'400+tfm[k+3];
+@y
+f:=((tfm[k+1] mod 16)*intcast(@'400)+tfm[k+2])*@'400+tfm[k+3];
+@z
+
+% [78] No progress reports unless verbose.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+ incr(chars_on_line);
+ end;
+ print_octal(c); {progress report}
+@y
+ if verbose then incr(chars_on_line);
+ end;
+ if verbose then print_octal(c); {progress report}
+@z
+
+% [89] 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
+@z
+
+% [90] Change name of the function `f'.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+ r:=f(r,(hash[r]-1)div 256,(hash[r]-1)mod 256);
+@y
+ r:=f_fn(r,(hash[r]-1)div 256,(hash[r]-1)mod 256);
+@z
+
+% [94] 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. We also have to change the name, because there is also a
+% variable named `f', and some C compilers can't deal with that.
+@x
+@p function f(@!h,@!x,@!y:index):index; forward;@t\2@>
+ {compute $f$ for arguments known to be in |hash[h]|}
+@y
+@p
+ifdef('notdef')
+function f_fn(@!h,@!x,@!y:index):index; begin end;@t\2@>
+ {compute $f$ for arguments known to be in |hash[h]|}
+endif('notdef')
+@z
+@x
+else eval:=f(h,x,y);
+@y
+else eval:=f_fn(h,x,y);
+@z
+
+% [95] The real definition of f.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+@p function f;
+@y
+@p function f_fn(@!h,@!x,@!y:index):index;
+@z
+@x
+f:=lig_z[h];
+@y
+f_fn:=lig_z[h];
+@z
+
+% [99] No final newline unless verbose.
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+@x
+do_characters; print_ln('.');@/
+@y
+do_characters; if verbose then print_ln('.');@/
+@z
+
+@x [100] System-dependent changes.
+This section should be replaced, if necessary, by changes to the program
+that are necessary to make \.{TFtoPL} 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 = 4; {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
+ {End of arguments; we exit the loop below.} ;
+
+ end else if getopt_return_val = "?" then begin
+ usage ('tftopl');
+
+ end else if argument_is ('help') then begin
+ usage_help (TFTOPL_HELP, nil);
+
+ end else if argument_is ('version') then begin
+ print_version_and_exit (banner, nil, 'D.E. Knuth');
+
+ end else if argument_is ('charcode-format') then begin
+ if strcmp (optarg, 'ascii') = 0 then
+ charcode_format := charcode_ascii
+ else if strcmp (optarg, 'octal') = 0 then
+ charcode_format := charcode_octal
+ else
+ print_ln ('Bad character code format', optarg, '.');
+
+ 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.}
+ if (optind + 1 <> argc) and (optind + 2 <> argc) then begin
+ print_ln ('tftopl: Need one or two file arguments.');
+ usage ('tftopl');
+ end;
+
+ tfm_name := cmdline (optind);
+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?
+@.-verbose@>
+
+@<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;
+
+@ This option changes how we output character codes.
+@.-charcode-format@>
+
+@<Define the option...@> =
+long_options[current_option].name := 'charcode-format';
+long_options[current_option].has_arg := 1;
+long_options[current_option].flag := 0;
+long_options[current_option].val := 0;
+incr (current_option);
+
+@ We use an ``enumerated'' type to store the information.
+
+@<Type...@> =
+@!charcode_format_type = charcode_ascii..charcode_default;
+
+@
+@<Const...@> =
+@!charcode_ascii = 0;
+@!charcode_octal = 1;
+@!charcode_default = 2;
+
+@
+@<Global...@> =
+@!charcode_format: charcode_format_type;
+
+@ It starts off as the default, that is, we output letters and digits as
+ASCII characters, everything else in octal.
+
+@<Initialize the option...@> =
+charcode_format := charcode_default;
+
+@ 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:c_string;
+@z