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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/dvicopy.ch
parent947b43de3dd21d58ccc2ffadefc4441ea1c2a813 (diff)
restore Build,TODO from r57911
git-svn-id: svn://tug.org/texlive/trunk@57915 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Build/source/texk/web2c/dvicopy.ch')
-rw-r--r--Build/source/texk/web2c/dvicopy.ch699
1 files changed, 699 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/dvicopy.ch b/Build/source/texk/web2c/dvicopy.ch
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+++ b/Build/source/texk/web2c/dvicopy.ch
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+% dvicopy.ch for C compilation with web2c.
+% The original version of this file was created by Monika Jayme and
+% Klaus Guntermann at TH Darmstadt (THD), FR Germany.
+% Some parts are borrowed from the changes to dvitype, vftovp and vptovf.
+%
+% July 90 THD First versions for dvicopy 0.91 and 0.92
+% Aug 09 90 THD Updated to dvicopy 1.0 and released
+% Mar 20 91 THD Updated to dvicopy 1.2
+% (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
+@z
+
+@x [1] Define my_name
+@d banner=='This is DVIcopy, Version 1.6' {printed when the program starts}
+@y
+@d my_name=='dvicopy'
+@d banner=='This is DVIcopy, Version 1.6' {printed when the program starts}
+@z
+
+@x [2] No random reading on stdin, may be not seekable.
+@d random_reading==true {should we skip around in the file?}
+@y
+@<Globals in the outer block@>=
+@!random_reading:boolean; {should we skip around in the file?}
+@z
+
+@x [3] Purge non-local 'goto'.
+calls the `|jump_out|' procedure, which goes to the label |final_end|.
+
+@d final_end = 9999 {go here to wrap it up}
+@y
+calls the `|jump_out|' procedure.
+@z
+@x
+label final_end;
+@y
+@z
+
+@x [3] Set up kpathsea.
+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;
+ print (banner); print_ln (version_string);
+@z
+
+@x [5] Big enough arrays to convert the dvilj sample font document.
+@<Constants...@>=
+@!max_fonts=100; {maximum number of distinct fonts}
+@!max_chars=10000; {maximum number of different characters among all fonts}
+@!max_widths=3000; {maximum number of different characters widths}
+@!max_packets=5000; {maximum number of different characters packets;
+ must be less than 65536}
+@!max_bytes=30000; {maximum number of bytes for characters packets}
+@!max_recursion=10; {\.{VF} files shouldn't recurse beyond this level}
+@!stack_size=100; {\.{DVI} files shouldn't |push| beyond this depth}
+@!terminal_line_length=150; {maximum number of characters input in a single
+ line of input from the terminal}
+@!name_length=50; {a file name shouldn't be longer than this}
+@y
+@<Constants...@>=
+@!max_fonts=400; {maximum number of distinct fonts}
+@!max_chars=750000; {maximum number of different characters among all fonts}
+@!max_widths=16000; {maximum number of different characters widths}
+@!max_packets=65530; {maximum number of different characters packets;
+ must be less than 65536}
+@!max_bytes=250000; {maximum number of bytes for characters packets}
+@!max_recursion=10; {\.{VF} files shouldn't recurse beyond this level}
+@!stack_size=100; {\.{DVI} files shouldn't |push| beyond this depth}
+@!terminal_line_length=256; {maximum number of characters input in a single
+ line of input from the terminal}
+@z
+
+% [7] Rename the integer types, as they collide with names used by C99.
+% Rather than change the code all over the place, we use macros to do
+% the renaming. This could also be done at C preprocessor level.
+@x
+@d int_32 == integer {signed 32~bit integers}
+@y
+@d int_32 == integer {signed 32~bit integers}
+@d int_31 == int_31_t
+@d int_24u == int_24u_t
+@d int_24 == int_24_t
+@d int_23 == int_23_t
+@d int_16u == int_16u_t
+@d int_16 == int_16_t
+@d int_15 == int_15_t
+@d int_8u == int_8u_t
+@d int_8 == int_8_t
+@d int_7 == int_7_t
+@z
+
+% [11] Redirect output, so it can go to either stdout or stderr,
+% depending on where the output dvi file is going.
+@x
+@d print(#)==write(output,#)
+@d print_ln(#)==write_ln(output,#)
+@d new_line==write_ln(output) {start new line}
+@y
+@d print(#)==write(term_out,#)
+@d print_ln(#)==write_ln(term_out,#)
+@d new_line==write_ln(term_out) {start new line}
+@z
+
+@x [14] Permissive input.
+@!ASCII_code=" ".."~"; {a subrange of the integers}
+@y
+@!ASCII_code=0..255; {a subrange of the integers}
+@z
+
+% [15] The text_char type is used as an array index into xord. The
+% default type `char' produces signed integers, which are bad array
+% indices in C.
+@x
+@d text_char == char {the data type of characters in text files}
+@d first_text_char=0 {ordinal number of the smallest element of |text_char|}
+@d last_text_char=127 {ordinal number of the largest element of |text_char|}
+@y
+@d text_char == ASCII_code {the data type of characters in text files}
+@d first_text_char=0 {ordinal number of the smallest element of |text_char|}
+@d last_text_char=255 {ordinal number of the largest element of |text_char|}
+@z
+
+@x [23] Remove non-local goto, declare jump_out as noreturn
+so a procedure called |jump_out| has been introduced. This procedure, which
+transfers control to the label |final_end| at the end of the program,
+contains the only non-local |@!goto| statement in \.{\title}.
+@^system dependencies@>
+Some \PASCAL\ compilers do not implement non-local |goto| statements. In
+such cases the |goto final_end| in |jump_out| should simply be replaced
+by a call on some system procedure that quietly terminates the program.
+@y
+so a procedure called |jump_out| has been introduced.
+@z
+@x
+@d abort(#)==begin print_ln(' ',#,'.'); jump_out;
+ end
+
+@<Error handling...@>=
+@<Basic printing procedures@>@;
+procedure close_files_and_terminate; forward;
+@#
+procedure jump_out;
+begin mark_fatal; close_files_and_terminate;
+goto final_end;
+end;
+@y
+@f noreturn==procedure
+@d abort(#)==begin write_ln(stderr, ' ',#,'.'); jump_out;
+ end
+
+@<Error handling...@>=
+@<Basic printing procedures@>@;
+procedure close_files_and_terminate; forward;
+@#
+noreturn procedure jump_out;
+begin mark_fatal; close_files_and_terminate;
+uexit(1);
+end;
+@z
+
+@x [24] Declare confusion as noreturn
+says |confusion(|indication of where we are|)|.
+@y
+says |confusion|(indication of where we are).
+@z
+@x
+procedure confusion(@!p:pckt_pointer);
+@y
+noreturn procedure confusion(@!p:pckt_pointer);
+@z
+
+@x [25] Declare overflow as noreturn
+procedure overflow(@!p:pckt_pointer;@!n:int_16u);
+@y
+noreturn procedure overflow(@!p:pckt_pointer;@!n:int_16u);
+@z
+
+@x [62] cur_name is no longer a fixed-size array.
+@!cur_name:packed array[1..name_length] of char; {external name,
+ with no lower case letters}
+@y
+@!cur_name:^char;
+@z
+
+@x [63] Ignore arguments to make_font_name.
+@ For \.{TFM} and \.{VF} files we just append the appropriate extension
+to the file name packet; in addition a system dependent area part
+(usually different for \.{TFM} and \.{VF} files) is prepended if
+the file name packet contains no area part.
+@^system dependencies@>
+
+@d append_to_name(#)==
+ if l_cur_name<name_length then
+ begin incr(l_cur_name); cur_name[l_cur_name]:=#;
+ end
+ else overflow(str_name_length,name_length)
+@d make_font_name_end(#)==
+ append_to_name(#[l]); make_name
+@d make_font_name(#)==
+ l_cur_name:=0; for l:=1 to # do make_font_name_end
+@y
+@ Since files are actually searched through path definitions,
+the area definitions are ignored here.
+To reduce the required changes we simply ignore the parameters given
+to |make_font_name|.
+@^system dependencies@>
+
+@d append_to_name(#)== begin
+ cur_name[l_cur_name]:=#;
+ incr(l_cur_name);
+ end
+@d make_font_name_end(#)==
+ make_name
+@d make_font_name(#)==
+ l_cur_name:=0; make_font_name_end
+@z
+
+% [67] No conversion of filenames in lower case, and initialize and
+% terminate for C strings. Eliminate now unused variable.
+@x
+@!c:char; {a character to be appended to |cur_name|}
+@y
+@z
+
+@x
+cur_loc:=pckt_start[n]; cur_limit:=pckt_start[n+1];
+@y
+cur_name := xmalloc_array (char, pckt_length (n) + pckt_length (e));
+cur_loc:=pckt_start[n]; cur_limit:=pckt_start[n+1];
+@z
+
+@x
+ if (b>="a")and(b<="z") then Decr(b)(("a"-"A")); {convert to upper case}
+@y
+@z
+
+@x
+cur_loc:=pckt_start[e]; cur_limit:=pckt_start[e+1];
+while cur_loc<cur_limit do
+ begin pckt_extract(b); append_res_to_name(xchr[b]);
+ end;
+while l_cur_name<name_length do
+ begin incr(l_cur_name); cur_name[l_cur_name]:=' ';
+ end;
+@y Skip copying in the extension, kpathsea knows what to do.
+ cur_name[l_cur_name] := 0;
+@z
+
+@x [91] Lower case file name extensions.
+id4(".")("T")("F")("M")(tfm_ext); {file name extension for \.{TFM} files}
+@y
+id4(".")("t")("f")("m")(tfm_ext); {file name extension for \.{TFM} files}
+@z
+
+@x [92] Set default directory name
+@ If no font directory has been specified, \.{\title} is supposed to use
+the default \.{TFM} directory, which is a system-dependent place where
+the \.{TFM} files for standard fonts are kept.
+The string variable |TFM_default_area| contains the name of this area.
+@^system dependencies@>
+
+@d TFM_default_area_name=='TeXfonts:' {change this to the correct name}
+@d TFM_default_area_name_length=9 {change this to the correct length}
+
+@<Glob...@>=
+@!TFM_default_area:packed array[1..TFM_default_area_name_length] of char;
+@y
+@ If no font directory has been specified, we search paths.
+@z
+
+@x [93] Remove initialization of now-defunct array
+@ @<Set init...@>=
+TFM_default_area:=TFM_default_area_name;
+@y
+@ (No initialization to be done. Keep this module to preserve numbering.)
+@z
+
+@x [94] Declare bad_tfm as noreturn
+procedure bad_tfm;
+@y
+noreturn procedure bad_tfm;
+@z
+
+@x [94] Declare bad_font as noreturn
+procedure bad_font;
+@y
+noreturn procedure bad_font;
+@z
+
+@x [95] Open TFM file
+@<TFM: Open |tfm_file|@>=
+make_font_name(TFM_default_area_name_length)(TFM_default_area)(tfm_ext);
+reset(tfm_file,cur_name);
+if eof(tfm_file) then
+@y
+|TFM_default_area_name_length| and |TFM_default_area| will not
+be used by |make_font_name|.
+
+@<TFM: Open |tfm_file|@>=
+make_font_name(TFM_default_area_name_length)(TFM_default_area)(tfm_ext);
+full_name := kpse_find_tfm (cur_name);
+if full_name then begin
+ resetbin (tfm_file, full_name);
+ free (cur_name);
+ free (full_name);
+end else
+@z
+
+@x [104] Compute alpha and beta.
+alpha:=16;
+while z>=@'40000000 do
+@y
+alpha:=16;
+if z>=@'1000000000 then abort('Character size is too large!');
+while z>=@'40000000 do
+@z
+
+@x [108] Declare full_name.
+@!dvi_loc:int_32; {where we are about to look, in |dvi_file|}
+@y
+@!dvi_loc:int_32; {where we are about to look, in |dvi_file|}
+@!full_name: ^char;
+@z
+
+@x [109] Declare bad_dvi as noreturn
+procedure bad_dvi;
+@y
+noreturn procedure bad_dvi;
+@z
+
+@x [111] Fix up opening the binary files
+@ To prepare |dvi_file| for input, we |reset| it.
+
+@<Open input file(s)@>=
+reset(dvi_file); {prepares to read packed bytes from |dvi_file|}
+dvi_loc:=0;
+@y
+@ To prepare |dvi_file| for input, we |reset| it.
+
+@<Open input file(s)@>=
+dvi_loc:=0;
+@z
+
+@x [113] Make dvi_length() and dvi_move() work.
+@p function dvi_length:int_32;
+begin set_pos(dvi_file,-1); dvi_length:=cur_pos(dvi_file);
+end;
+@#
+procedure dvi_move(@!n:int_32);
+begin set_pos(dvi_file,n); dvi_loc:=n;
+end;
+@y
+@p function dvi_length:int_32;
+begin xfseek(dvi_file, 0, 2, dvi_name);
+dvi_loc:=xftell(dvi_file, dvi_name);
+dvi_length:=dvi_loc;
+end;
+@#
+procedure dvi_move(n:int_32);
+begin xfseek(dvi_file, n, 0, dvi_name);
+dvi_loc:=n;
+end;
+@z
+
+@x [135] Lower case file name extensions.
+id3(".")("V")("F")(vf_ext); {file name extension for \.{VF} files}
+@y
+id3(".")("v")("f")(vf_ext); {file name extension for \.{VF} files}
+@z
+
+@x [137/138] Set default directory name
+@ If no font directory has been specified, \.{\title} is supposed to use
+the default \.{VF} directory, which is a system-dependent place where
+the \.{VF} files for standard fonts are kept.
+The string variable |VF_default_area| contains the name of this area.
+@^system dependencies@>
+
+@d VF_default_area_name=='TeXvfonts:' {change this to the correct name}
+@d VF_default_area_name_length=10 {change this to the correct length}
+
+@<Glob...@>=
+@!VF_default_area:packed array[1..VF_default_area_name_length] of char;
+
+@ @<Set init...@>=
+VF_default_area:=VF_default_area_name;
+@y
+@ If no font directory has been specified, \.{\title} is supposed to use
+the default \.{VF} directory, which is a system-dependent place where
+the \.{VF} files for standard fonts are kept.
+
+Actually, under UNIX the standard area is defined in an external
+file \.{site.h}. And the users have a path searched for fonts,
+by setting the \.{VFFONTS} environment variable.
+
+@ (No initialization to be done. Keep this module to preserve numbering.)
+@z
+
+@x [139] Open VF file
+@<VF: Open |vf_file| or |goto not_found|@>=
+make_font_name(VF_default_area_name_length)(VF_default_area)(vf_ext);
+reset(vf_file,cur_name);
+if eof(vf_file) then
+@^system dependencies@>
+@y
+Do path searching. But the \.{VF} file may not exist.
+
+@<VF: Open |vf_file| or |goto not_found|@>=
+make_font_name(VF_default_area_name_length)(VF_default_area)(vf_ext);
+full_name := kpse_find_vf (cur_name);
+if full_name then begin
+ resetbin (vf_file, full_name);
+ free (cur_name);
+ free (full_name);
+end else
+@z
+
+@x [163] copy elements of array piece by piece
+@ @<VF: Start a new level@>=
+append_one(push);
+vf_move[vf_ptr]:=vf_move[vf_ptr-1];
+@y
+@ \.{web2c} does not like array assignments. So we need to do them
+through a macro replacement.
+
+@d do_vf_move(#) == vf_move[vf_ptr]# := vf_move[vf_ptr-1]#
+@d vf_move_assign == begin do_vf_move([0][0]); do_vf_move([0][1]);
+ do_vf_move([1][0]); do_vf_move([1][1])
+ end
+
+@<VF: Start a new level@>=
+append_one(push);
+vf_move_assign;
+@z
+
+@x [170] and again...
+ vf_move[vf_ptr]:=vf_move[vf_ptr-1];
+@y
+ vf_move_assign;
+@z
+
+@x [176] break is fflush.
+@d update_terminal == break(output) {empty the terminal output buffer}
+@y
+@d update_terminal == fflush(stdout) {empty the terminal output buffer}
+@z
+
+@x [176]
+procedure input_ln; {inputs a line from the terminal}
+var k:0..terminal_line_length;
+begin if n_opt=0 then
+ begin print('Enter option: '); update_terminal; reset(input);
+ if eoln(input) then read_ln(input);
+ k:=0; pckt_room(terminal_line_length);
+ while (k<terminal_line_length)and not eoln(input) do
+ begin append_byte(xord[input^]); incr(k); get(input);
+ end;
+ end
+else if k_opt<n_opt then
+ begin incr(k_opt);
+ {Copy command line option number |k_opt| into |byte_mem| array!}
+ end;
+end;
+@y
+procedure input_ln; {inputs a line from the terminal}
+var k:0..terminal_line_length;
+begin print('Enter option: '); update_terminal;
+{|if eoln(input) then read_ln(input);|}
+k:=0; pckt_room(terminal_line_length);
+while (k<terminal_line_length)and not eoln(input) do
+ begin append_byte(xord[getc(input)]); incr(k);
+ end;
+end;
+@z
+
+@x [241] No dialog, remove unused final label.
+dialog; {get options}
+@y
+@z
+@x
+final_end:end.
+@y
+end.
+@z
+
+@x [245] Do this later, to avoid creating empty files.
+@<Open output file(s)@>=
+rewrite(out_file); {prepares to write packed bytes to |out_file|}
+@y
+@<Open output file(s)@>=
+@z
+
+@x [247] Use external routine to output bytes.
+@d out_byte(#) == write(out_file,#) {write next \.{DVI} byte}
+@y
+@d out_byte(#) == put_byte(#,out_file) {write next \.{DVI} byte}
+@z
+
+@x [260] String declaration.
+@!comment:packed array[1..comm_length] of char; {preamble comment prefix}
+@y
+@!comment:const_c_string; {preamble comment prefix}
+@z
+
+@x [261] Output the string from 0 to len-1, not 1 to len.
+for k:=1 to comm_length do append_byte(xord[comment[k]]);
+@y
+for k:=0 to comm_length - 1 do append_byte(xord[ucharcast(comment[k])]);
+@z
+
+@x [293] System-dependent changes.
+This section should be replaced, if necessary, by changes to the program
+that are necessary to make \.{DVIcopy} 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.
+
+This macro tests if its argument is the current option, as represented
+by the index variable |option_index|.
+
+@d argument_is (#) == (strcmp (long_options[option_index].name, #) = 0)
+
+@<Define |parse_arguments|@> =
+procedure parse_arguments;
+const n_options = 5; {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;
+ @!k, @!m: c_int_type;
+ @!end_num: ^char;
+begin
+ @<Define the option table@>;
+ @<Initialize options@>;
+ 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 (DVICOPY_HELP, nil);
+
+ end else if argument_is ('version') then begin
+ print_version_and_exit (banner, 'Peter Breitenlohner', nil, nil);
+
+ end else if argument_is ('magnification') then begin
+ out_mag := atou (optarg);
+
+ end else if argument_is ('max-pages') then begin
+ max_pages := atou (optarg);
+ incr (cur_select);
+
+ end else if argument_is ('page-start') then begin
+ @<Determine the desired |start_count| values from |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.
+ We can have zero, one, or two remaining arguments.}
+ if (optind > argc) or (optind + 2 < argc) then begin
+ write_ln (stderr, my_name, ': Need at most two file arguments.');
+ usage (my_name);
+ end;
+
+ if optind = argc then begin
+ dvi_name := '<stdin>';
+ dvi_file := make_binary_file (stdin);
+ random_reading := false;
+ end else begin
+ dvi_name := extend_filename (cmdline (optind), 'dvi');
+ resetbin (dvi_file, dvi_name);
+ random_reading := true;
+ end;
+
+ if optind + 2 = argc then begin
+ rewritebin (out_file, extend_filename (cmdline (optind + 1), 'dvi'));
+ term_out := stdout;
+ end else begin
+ out_file := make_binary_file (stdout);
+ term_out := stderr;
+ end;
+end;
+
+@ Here is the first of the options we allow.
+@.-help@>
+
+@<Define the option...@> =
+current_option := 0;
+long_options[0].name := 'help';
+long_options[0].has_arg := 0;
+long_options[0].flag := 0;
+long_options[0].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);
+
+@ Magnification to apply.
+@.-magnification@>
+
+@<Define the option...@> =
+long_options[current_option].name := 'magnification';
+long_options[current_option].has_arg := 1;
+long_options[current_option].flag := 0;
+long_options[current_option].val := 0;
+incr (current_option);
+
+@ How many pages to do.
+@.-max-pages@>
+
+@<Define the option...@> =
+long_options[current_option].name := 'max-pages';
+long_options[current_option].has_arg := 1;
+long_options[current_option].flag := 0;
+long_options[current_option].val := 0;
+incr (current_option);
+
+@ What page to start at.
+@.-page-start@>
+
+@<Define the option...@> =
+long_options[current_option].name := 'page-start';
+long_options[current_option].has_arg := 1;
+long_options[current_option].flag := 0;
+long_options[current_option].val := 0;
+incr (current_option);
+
+@ Parsing the starting page specification is a bit complicated.
+(This is the same as in \.{DVItype}.)
+
+@<Determine the desired |start_count|...@> =
+k := 0; {which \.{\\count} register we're on}
+m := 0; {position in |optarg|}
+while optarg[m] do begin
+ if optarg[m] = "*" then begin
+ start_there[k] := false;
+ incr (m);
+
+ end else if optarg[m] = "." then begin
+ incr (k);
+ if k >= 10 then begin
+ write_ln (stderr, my_name, ': More than ten count registers specified.');
+ uexit (1);
+ end;
+ incr (m);
+
+ end else begin
+ start_count[k] := strtol (optarg + m, address_of (end_num), 10);
+ if end_num = optarg + m then begin
+ write_ln (stderr, my_name, ': -page-start values must be numeric or *.');
+ uexit (1);
+ end;
+ start_there[k] := true;
+ m := m + end_num - (optarg + m);
+ end;
+end;
+start_vals := k;
+selected := 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;
+
+@ @<Glob...@> =
+@!term_out:text;
+@!dvi_name:const_c_string;
+@z