% $Id: mp.ch,v 1.8 2005/03/18 19:49:05 taco Exp $ % mp.ch for C compilation with web2c. Public domain. % % Derived from mf.ch and John Hobby's mp.ch (the change file for the C % version of mf). % % Numbers of the form [pp.nnn] refer to the corresponding part and % module number of mp.web as implementors who read this change file are % much better advised to use a current WEB listing of MetaPost. % % (more recent changes in ChangeLog) % Revision 0.62 Jan 4 '95 by John Hobby % (Changes that only affect the banner line are not listed here) % % Updated for web2c-6.1/kpathsea-2.6 Jan 29 '95 by Ulrik Vieth % according to the current version of mf.ch. % % - produce separate binaries for INIMP, VIRMF (no '-I' flag!) % - make a big version of MP by default (cf. TeX and METAFONT) % - allow any input characters (0..255) (cf. TeX and METAFONT) % - use web2c/kpathsea routines in file opening and searching % % Updated for Revision 0.63 Apr 12 '95 by Ulrik Vieth % % - fixed the parsing routines for ps_tab_file to be able to handle % comments and blank lines in dvipsk's version of psfonts.map. % - increased max_read_files to 30 to avoid running out of read files % when reading stops before reaching EOF. (Better solution: write % a 'closefrom' macro that reads to EOF, which causes file closing.) @x [0] WEAVE: print changes only. \def\botofcontents{\vskip 0pt plus 1fil minus 1.5in} @y \def\botofcontents{\vskip 0pt plus 1fil minus 1.5in} \let\maybe=\iffalse \def\title{\MP\ changes for C} \def\glob{13}\def\gglob{20, 25} % these are defined in module 1 \font\mc=cmr9 @z @x [1.7] Convert `debug..gubed' and `stat..tats' into #ifdefs. @d debug==@{ {change this to `$\\{debug}\equiv\null$' when debugging} @d gubed==@t@>@} {change this to `$\\{gubed}\equiv\null$' when debugging} @y @d debug==ifdef('TEXMF_DEBUG') @d gubed==endif('TEXMF_DEBUG') @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==ifdef('STAT') @d tats==endif('STAT') @z @x [1.8] Same, for `init..tini'. @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==ifdef('INIMP') @d tini==endif('INIMP') @z % [1.11] Compile-time constants. Although we only change a few of % these, listing them all makes the patch file for a big MetaPost simpler. % 16K for BSD I/O; file_name_size is set from the system constant. @x @= @!mem_max=30000; {greatest index in \MP's internal |mem| array; must be strictly less than |max_halfword|; must be equal to |mem_top| in \.{INIMP}, otherwise |>=mem_top|} @!max_internal=100; {maximum number of internal quantities} @!buf_size=500; {maximum number of characters simultaneously present in current lines of open files; 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} @!emergency_line_length=255; {\ps\ output lines can be this long in unusual circumstances} @!stack_size=30; {maximum number of simultaneous input sources} @!max_read_files=4; {maximum number of simultaneously open \&{readfrom} files} @!max_strings=2500; {maximum number of strings; must not exceed |max_halfword|} @!string_vacancies=9000; {the minimum number of characters that should be available for the user's identifier names and strings, after \MP's own error messages are stored} @!strings_vacant=1000; {the minimum number of strings that should be available} @!pool_size=32000; {maximum number of characters in strings, including all error messages and help texts, and the names of all identifiers; must exceed |string_vacancies| by the total length of \MP's own strings, which is currently about 22000} @!font_max=50; {maximum font number for included text fonts} @!font_mem_size=10000; {number of words for \.{TFM} information for text fonts} @!file_name_size=40; {file names shouldn't be longer than this} @!pool_name='MPlib:MP.POOL '; {string of length |file_name_size|; tells where the string pool appears} @.MPlib@> @!ps_tab_name='MPlib:PSFONTS.MAP '; {string of length |file_name_size|; locates font name translation table} @!path_size=300; {maximum number of knots between breakpoints of a path} @!bistack_size=785; {size of stack for bisection algorithms; should probably be left at this value} @!header_size=100; {maximum number of \.{TFM} header words, times~4} @!lig_table_size=5000; {maximum number of ligature/kern steps, must be at least 255 and at most 32510} @!max_kerns=500; {maximum number of distinct kern amounts} @!max_font_dimen=50; {maximum number of \&{fontdimen} parameters} @y @d file_name_size == maxint @d ssup_error_line = 255 @d ssup_max_strings = 32767 {max value allowed by \.{TANGLE}} @= @!max_internal=300; {maximum number of internal quantities} @!emergency_line_length=255; {\ps\ output lines can be this long in unusual circumstances} @!stack_size=300; {maximum number of simultaneous input sources} @!max_read_files=30; {maximum number of simultaneously open \&{readfrom} files} @!strings_vacant=1000; {the minimum number of strings that should be available} @!font_max=50; {maximum font number for included text fonts} @!font_mem_size=10000; {number of words for \.{TFM} information for text fonts} @!pool_name=TEXMF_POOL_NAME; {string of length |file_name_size|; tells where the string pool appears} @!engine_name=TEXMF_ENGINE_NAME; {the name of this engine} @.MPlib@> @!ps_tab_name='psfonts.map'; {string of length |file_name_size|; locates font name translation table} @!bistack_size=1500; {size of stack for bisection algorithms; should probably be left at this value} @!header_size=100; {maximum number of \.{TFM} header words, times~4} @!lig_table_size=15000; {maximum number of ligature/kern steps, must be at least 255 and at most 32510} @!max_kerns=2500; {maximum number of distinct kern amounts} @!max_font_dimen=50; {maximum number of \&{fontdimen} parameters} @# @!inf_main_memory = 3000; @!sup_main_memory = 8000000; @!inf_max_strings = 2500; @!sup_max_strings = ssup_max_strings; @!inf_buf_size = 500; @!sup_buf_size = 300000; @!inf_path_size = 1000; @!sup_path_size = 300000; @!inf_pool_size = 32000; @!sup_pool_size = 10000000; @!inf_pool_free = 1000; @!sup_pool_free = sup_pool_size; @!inf_string_vacancies = 8000; @!sup_string_vacancies = sup_pool_size - 23000; @z @x [1.12] Constants defined as WEB macros. @d mem_min=0 {smallest index in the |mem| array, must not be less than |min_halfword|} @d mem_top==30000 {largest index in the |mem| array dumped by \.{INIMP}; must be substantially larger than |mem_min| and not greater than |mem_max|} @d hash_size=2100 {maximum number of symbolic tokens, must be less than |max_halfword-3*param_size|} @d hash_prime=1777 {a prime number equal to about 85\pct! of |hash_size|} @d max_in_open=6 {maximum number of input files and error insertions that can be going on simultaneously} @d param_size=150 {maximum number of simultaneous macro parameters} @d max_write_files=4 {maximum number of simultaneously open \&{write} files} @y @d mem_min=0 {smallest index in the |mem| array, must not be less than |min_halfword|} @d hash_size=9500 {maximum number of symbolic tokens, must be less than |max_halfword-3*param_size|} @d hash_prime=7919 {a prime number equal to about 85\pct! of |hash_size|} @d max_in_open=25 {maximum number of input files and error insertions that can be going on simultaneously} @d param_size=1500 {maximum number of simultaneous macro parameters} @d max_write_files=10 {maximum number of simultaneously open \&{write} files} @z @x [1.13] Global parameters that can be changed in texmf.cnf. @= @!bad:integer; {is some ``constant'' wrong?} @y @= @!bad:integer; {is some ``constant'' wrong?} @# @!init @!ini_version:boolean; {are we \.{INIMP}? Set in \.{lib/texmfmp.c}} @!dump_option:boolean; {was the dump name option used?} @!dump_line:boolean; {was a \.{\%\AM mem} line seen?} tini@/ @# @!bound_default:integer; {temporary for setup} @!bound_name:^char; {temporary for setup} @# @!main_memory:integer; {total memory words allocated in initex} @!mem_top:integer; {largest index in the |mem| array dumped by \.{INIMP}; must be substantially larger than |mem_min| and not greater than |mem_max|} @!extra_mem_top:integer; {|mem_max:=mem_top+extra_mem_top| except in \.{INIMP}} @!mem_max:integer; {greatest index in \MP's internal |mem| array; must be strictly less than |max_halfword|; must be equal to |mem_top| in \.{INIMP}, otherwise |>=mem_top|} @!error_line:integer; {width of context lines on terminal error messages} @!half_error_line:integer; {width of first lines of contexts in terminal error messages; should be between 30 and |error_line-15|} @!max_print_line:integer; {width of longest text lines output; should be at least 60} @!pool_size:integer; {maximum number of characters in strings, including all error messages and help texts, and the names of all identifiers; must exceed |string_vacancies| by the total length of \MP's own strings, which is currently about 22000} @!string_vacancies:integer; {the minimum number of characters that should be available for the user's identifier names and strings, after \MP's own error messages are stored} @!buf_size:integer; {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|} @!path_size:integer; {maximum number of knots between breakpoints of a path} @!pool_free:integer;{minimum pool space free after format loaded} @!max_strings:integer; {maximum number of strings; must not exceed |max_halfword|} @!parse_first_line_p:c_int_type; {parse the first line for options} @!file_line_error_style_p:c_int_type; {file:line:error style messages.} @!eight_bit_p:c_int_type; {make all characters printable by default} @!halt_on_error_p:c_int_type; {stop at first error} @!quoted_filename:boolean; {current filename is quoted} @z @x [1.16] Use C macros for `incr' and `decr'. @d incr(#) == #:=#+1 {increase a variable by unity} @d decr(#) == #:=#-1 {decrease a variable by unity} @y @z % [2.19] 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} @y @d text_char == ASCII_code {the data type of characters in text files} @z @x [2.22] Allow any character as input. @^character set dependencies@> @^system dependencies@> @= for i:=0 to @'37 do xchr[i]:=' '; for i:=@'177 to @'377 do xchr[i]:=' '; @y @^character set dependencies@> @^system dependencies@> @d tab = @'11 { ASCII horizontal tab } @d form_feed = @'14 { ASCII form feed } @= {Initialize |xchr| to the identity mapping.} for i:=0 to @'37 do xchr[i]:=i; for i:=@'177 to @'377 do xchr[i]:=i; @z @x [2.23] for i:=0 to @'176 do xord[xchr[i]]:=i; @y for i:=0 to @'176 do xord[xchr[i]]:=i; {Set |xprn| for printable ASCII, unless |eight_bit_p| is set.} for i:=0 to 255 do xprn[i]:=(eight_bit_p or ((i>=" ")and(i<="~"))); {The idea for this dynamic translation comes from the patch by Libor Skarvada \.{} and Petr Sojka \.{}. I didn't use any of the actual code, though, preferring a more general approach.} {This sets the |xchr|, |xord|, and |xprn| arrays. We overwrite the |xchr| assignments from module 21, just in case someone wants to do strange character translations. See the function definition in \.{texmfmp.c} for more comments.} if translate_filename then read_tcx_file; @z % [3.25] Declare name_of_file as a C string. See comments in tex.ch for % why we change the element type to text_char. @x @!name_of_file:packed array[1..file_name_size] of char;@;@/ {on some systems this may be a \&{record} variable} @y @!name_of_file:^text_char; @z @x [3.26] Do file opening in C. @ The \ph\ compiler with which the original version of \MF\ was prepared extends 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 `\ignorespaces|packed array[@t\<\\{any}>@>] of text_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 \MP\ to undertake appropriate corrective action. @:PASCAL H}{\ph@> @^system dependencies@> \MP'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 @ All of the file opening functions are defined in C. @d no_file_path = -1 @z @x [3.27] Do file closing in C. @ Files can be closed with the \ph\ routine `|close(f)|', which @^system dependencies@> should be used when all input or output with respect to |f| has been completed. This makes |f| available to be opened again, if desired; and if |f| was used for output, the |close| operation makes the corresponding external file appear on the user's area, ready to be read. @p procedure a_close(var @!f:alpha_file); {close a text file} begin close(f); end; @# procedure b_close(var @!f:byte_file); {close a binary file} begin close(f); end; @# procedure w_close(var @!f:word_file); {close a word file} begin close(f); end; @y @ And all the file closing routines as well. @z @x [3.29] l.888 - Array size of input buffer is determined at runtime. @!buffer:array[0..buf_size] of ASCII_code; {lines of characters being read} @y @!buffer:^ASCII_code; {lines of characters being read} @z @x [3.30] Do `input_ln' in C. Standard \PASCAL\ says that a file should have |eoln| immediately before |eof|, but \MP\ needs only a weaker restriction: If |eof| occurs in the middle of a line, the system function |eoln| should return a |true| result (even though |f^| will be undefined). @p function input_ln(var @!f:alpha_file;@!bypass_eoln:boolean):boolean; {inputs the next line or returns |false|} var @!last_nonblank:0..buf_size; {|last| with trailing blanks removed} begin if bypass_eoln then if not eof(f) then get(f); {input the first character of the line into |f^|} last:=first; {cf.\ Matthew 19\thinspace:\thinspace30} if eof(f) then input_ln:=false else begin last_nonblank:=first; while not eoln(f) do begin if last>=max_buf_stack then begin max_buf_stack:=last+1; if max_buf_stack=buf_size then @; end; buffer[last]:=xord[f^]; get(f); incr(last); if buffer[last-1]<>" " then last_nonblank:=last; end; last:=last_nonblank; input_ln:=true; end; end; @y We define |input_ln| in C, for efficiency. Nevertheless we quote the module `Report overflow of the input buffer, and abort' here in order to make \.{WEAVE} happy. @p @{ @ @} @z @x [3.31] `term_in' and `term_out' are standard input and output. @= @!term_in:alpha_file; {the terminal as an input file} @!term_out:alpha_file; {the terminal as an output file} @y @d term_in==stdin {the terminal as an input file} @d term_out==stdout {the terminal as an output file} @z @x [3.32] We don't need to open the terminal files. @ Here is how to open the terminal files in \ph. The `\.{/I}' switch suppresses the first |get|. @^system dependencies@> @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 @ Here is how to open the terminal files. |t_open_out| does nothing. |t_open_in|, on the other hand, does the work of ``rescanning,'' or getting any command line arguments the user has provided. It's defined in C. @d t_open_out == {output already open for text output} @z @x [3.33] Flushing output. 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} @y these operations can be specified with {\mc UNIX}. |update_terminal| does an |fflush| (via the macro |flush|). |clear_terminal| is redefined to do nothing, since the user should control the terminal. @^system dependencies@> @d update_terminal == fflush(term_out) @d clear_terminal == do_nothing @z @x [3.36] Reading the command line. @ The following program does the required initialization without retrieving a possible command line. It should be clear how to modify this routine to deal with command lines, if the system permits them. @^system dependencies@> @p function init_terminal:boolean; {gets the terminal input started} label exit; begin t_open_in; loop@+begin wake_up_terminal; write(term_out,'**'); update_terminal; @.**@> if not input_ln(term_in,true) then {this shouldn't happen} begin write_ln(term_out); write(term_out,'! End of file on the terminal... why?'); @.End of file on the terminal@> init_terminal:=false; return; end; loc:=first; while (loc first|. @^system dependencies@> @p function init_terminal:boolean; {gets the terminal input started} label exit; begin t_open_in; if last > first then begin loc := first; while (loc < last) and (buffer[loc]=' ') do incr(loc); if loc < last then begin init_terminal := true; goto exit; end; end; loop@+begin wake_up_terminal; write(term_out, '**'); update_terminal; @.**@> if not input_ln(term_in,true) then begin {this shouldn't happen} write_ln(term_out); write_ln(term_out, '! End of file on the terminal... why?'); @.End of file on the terminal@> init_terminal:=false; return; end; loc:=first; while (loc"~") @y not xprn[k] @z @x [5.69] error_line is a variable, so can't be a subrange array bound @!trick_buf:array[0..error_line] of ASCII_code; {circular buffer for @y @!trick_buf:array[0..ssup_error_line] of ASCII_code; {circular buffer for @z @x [5.76] Print rest of banner, eliminate misleading `no preloaded' @ By popular demand, \MP\ prints the banner line only on the transcript file. Thus there is nothing special to be printed here. @= update_terminal; @y @ Here is the very first thing that \MP\ prints: a headline that identifies the version number and base name. The |term_offset| variable is temporarily incorrect, but the discrepancy is not serious since we assume that the banner and mem identifier together will occupy at most |max_print_line| character positions. @= wterm (banner); wterm (version_string); if mem_ident>0 then print(mem_ident); print_ln; if translate_filename then begin wterm('('); fputs(translate_filename, stdout); wterm_ln(')'); end; update_terminal; @z @x [6.83] l.1815 - Add unspecified_mode. @d error_stop_mode=3 {stops at every opportunity to interact} @y @d error_stop_mode=3 {stops at every opportunity to interact} @d unspecified_mode=4 {extra value for command-line switch} @z @x [6.83] l.1825 - file:line:error style messages. print_nl("! "); print(#); @y if (file_line_error_style_p and not terminal_input) then begin print_nl (""); print (full_source_filename_stack[in_open]); print (":"); print_int (line); print (": "); print (#); end else begin print_nl("! "); print(#) end; @z @x [6.83] l.1822 - Add interaction_option. @!interaction:batch_mode..error_stop_mode; {current level of interaction} @y @!interaction:batch_mode..error_stop_mode; {current level of interaction} @!interaction_option:batch_mode..unspecified_mode; {set from command line} @z @x [6.84] l.1824 - Allow override by command line switch. @ @=interaction:=error_stop_mode; @y @ @=if interaction_option=unspecified_mode then interaction:=error_stop_mode else interaction:=interaction_option; @z @x [6.90] Eliminate non-local goto. @= procedure jump_out; begin goto end_of_MP; end; @y @d do_final_end==begin update_terminal; ready_already:=0; if (history <> spotless) and (history <> warning_issued) then uexit(1) else uexit(0); end @= procedure jump_out; begin close_files_and_terminate; do_final_end; end; @z @x [6.92] l.1956 - halt on error? print_char("."); show_context; @y print_char("."); show_context; if (halt_on_error_p) then begin history:=fatal_error_stop; jump_out; end; @z @x [6.93] Handle the switch-to-editor option. line ready to be edited. But such an extension requires some system wizardry, so the present implementation simply types out the name of the file that should be edited and the relevant line number. @^system dependencies@> There is a secret `\.D' option available when the debugging routines haven't been commented~out. @^debugging@> @y line ready to be edited. We do this by calling the external procedure |call_edit| with a pointer to the filename, its length, and the line number. However, here we just set up the variables that will be used as arguments, since we don't want to do the switch-to-editor until after \MP\ has closed its files. @^system dependencies@> There is a secret `\.D' option available when the debugging routines have not been commented out. @^debugging@> @d edit_file==input_stack[file_ptr] @z @x "E": if file_ptr>0 then begin print_nl("You want to edit file "); @.You want to edit file x@> print(input_stack[file_ptr].name_field); print(" at line "); print_int(true_line);@/ interaction:=scroll_mode; jump_out; @y "E": if file_ptr>0 then begin edit_name_start:=str_start[edit_file.name_field]; edit_name_length:=length(edit_file.name_field); edit_line:=true_line; jump_out; @z @x [7.111] Do half and halfp in cpascal.h. @d half(#)==(#) div 2 @d halfp(#)==(#) div 2 @y @z @x [7.122-7.130] Optionally replace make_fraction etc. with external routines. @p function make_fraction(@!p,@!q:integer):fraction; @y In the C version, there are external routines that use double precision floating point to simulate functions such as |make_fraction|. This is carefully done to be virtually machine-independent and it gives up to 12 times speed-up on machines with hardware floating point. Since some machines do not have fast double-precision floating point, we provide a C preprocessor switch that allows selecting the standard versions given below. @p ifdef('FIXPT')@/ function make_fraction(@!p,@!q:integer):fraction; @z @x if negative then make_fraction:=-(f+n)@+else make_fraction:=f+n; end; end; @y if negative then make_fraction:=-(f+n)@+else make_fraction:=f+n; end; end;@/ endif('FIXPT') @z @x @p function take_fraction(@!q:integer;@!f:fraction):integer; @y @p ifdef('FIXPT')@/ function take_fraction(@!q:integer;@!f:fraction):integer; @z @x else take_fraction:=n+p; end; @y else take_fraction:=n+p; end;@/ endif('FIXPT') @z @x @p function take_scaled(@!q:integer;@!f:scaled):integer; @y @p ifdef('FIXPT')@/ function take_scaled(@!q:integer;@!f:scaled):integer; @z @x else take_scaled:=n+p; end; @y else take_scaled:=n+p; end;@/ endif('FIXPT') @z @x operands are positive. \ (This procedure is not used especially often, so it is not part of \MP's inner loop.) @p function make_scaled(@!p,@!q:integer):scaled; @y operands are positive. \ (This procedure is not used especially often, so it is not part of \MP's inner loop, but we might as well allow for an external C routine.) @p ifdef('FIXPT')@/ function make_scaled(@!p,@!q:integer):scaled; @z @x if negative then make_scaled:=-(f+n)@+else make_scaled:=f+n; end; end; @y if negative then make_scaled:=-(f+n)@+else make_scaled:=f+n; end; end;@/ endif('FIXPT') @z @x [7.134] Do floor_scaled, floor_unscaled, round_unscaled, round_fraction in C. @p function floor_scaled(@!x:scaled):scaled; {$2^{16}\lfloor x/2^{16}\rfloor$} var @!be_careful:integer; {temporary register} begin if x>=0 then floor_scaled:=x-(x mod unity) else begin be_careful:=x+1; floor_scaled:=x+((-be_careful) mod unity)+1-unity; end; end; @# function round_unscaled(@!x:scaled):integer; {$\lfloor x/2^{16}+.5\rfloor$} var @!be_careful:integer; {temporary register} begin if x>=half_unit then round_unscaled:=1+((x-half_unit) div unity) else if x>=-half_unit then round_unscaled:=0 else begin be_careful:=x+1; round_unscaled:=-(1+((-be_careful-half_unit) div unity)); end; end; @# function round_fraction(@!x:fraction):scaled; {$\lfloor x/2^{12}+.5\rfloor$} var @!be_careful:integer; {temporary register} begin if x>=2048 then round_fraction:=1+((x-2048) div 4096) else if x>=-2048 then round_fraction:=0 else begin be_careful:=x+1; round_fraction:=-(1+((-be_careful-2048) div 4096)); end; end; @y @z @x [9.168] Increase memory size. @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=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==@"FFFFFFF {largest allowable value in a |halfword|} @z @x [9.170] Don't bother to subtract zero. @d ho(#)==#-min_halfword {to take a sixteen-bit item from a halfword} @d qo(#)==#-min_quarterword {to read eight bits from a quarterword} @d qi(#)==#+min_quarterword {to store eight bits in a quarterword} @y @d ho(#)==# @d qo(#)==# @d qi(#)==# @z @x [9.171] memory_word is defined externally. @!two_halves = packed record@;@/ @!rh:halfword; case two_choices of 1: (@!lh:halfword); 2: (@!b0:quarterword; @!b1:quarterword); end; @!four_quarters = packed record@;@/ @!b0:quarterword; @!b1:quarterword; @!b2:quarterword; @!b3:quarterword; end; @!memory_word = record@;@/ case three_choices of 1: (@!int:integer); 2: (@!hh:two_halves); 3: (@!qqqq:four_quarters); end; @y @=#include "texmfmem.h";@> @z @x [9.174] mem is dynamically allocated. @!mem : array[mem_min..mem_max] of memory_word; {the big dynamic storage area} @y @!mem : ^memory_word; {the big dynamic storage area} @z @x [10.184] Fix an unsigned/signed problem in getnode. if r>p+1 then @; @y if r>intcast(p+1) then @; @z % [11.193] Change the word `free' so that it doesn't conflict with the % standard C library routine of the same name. Also change arrays that % use mem_max, since that's a variable now, effectively disabling the feature. @x are debugging.) @= @!debug @!free: packed array [mem_min..mem_max] of boolean; {free cells} @t\hskip1em@>@!was_free: packed array [mem_min..mem_max] of boolean; @y are debugging.) @d free==free_arr @= @!debug @!free: packed array [0..1] of boolean; {free cells} @t\hskip1em@>@!was_free: packed array [0..1] of boolean; @z @x [11.197] Eliminate unsigned comparisons to zero. repeat if (p>=lo_mem_max)or(p=lo_mem_max)or(rlink(p)=lo_mem_max) then clobbered:=true else if (rlink(p)>=lo_mem_max) then clobbered:=true @z @x [12.212] Do `fix_date_and_time' in C. @ The following procedure, which is called just before \MP\ initializes its input and output, establishes the initial values of the date and time. @^system dependencies@> Since standard \PASCAL\ cannot provide such information, something special is needed. The program here simply specifies July 4, 1776, at noon; but users probably want a better approximation to the truth. Note that the values are |scaled| integers. Hence \MP\ can no longer be used after the year 32767. @p procedure fix_date_and_time; begin internal[time]:=12*60*unity; {minutes since midnight} internal[day]:=4*unity; {fourth day of the month} internal[month]:=7*unity; {seventh month of the year} internal[year]:=1776*unity; {Anno Domini} end; @y @ The following procedure, which is called just before \MP\ initializes its input and output, establishes the initial values of the date and time. It is calls an externally defined |date_and_time|, even though it could be done from Pascal. The external procedure also sets up interrupt catching. @^system dependencies@> Note that the values are |scaled| integers. Hence \MP\ can no longer be used after the year 32767. @p procedure fix_date_and_time; begin date_and_time(internal[time],internal[day],internal[month],internal[year]); internal[time] := internal[time] * unity; internal[day] := internal[day] * unity; internal[month] := internal[month] * unity; internal[year] := internal[year] * unity; end; @z @x Replace class with c_class to avoid C++ keyword. @d max_class=20 {the largest class number} @y @d max_class=20 {the largest class number} @d class==c_class @z @x [12.217] Allow tab and form feed as input. for k:=127 to 255 do char_class[k]:=invalid_class; @y for k:=127 to 255 do char_class[k]:=invalid_class; char_class[tab]:=space_class; char_class[form_feed]:=space_class; @z @x [18.300,301] l.6451 - Make path_size a configuration option. @!delta_x,@!delta_y,@!delta:array[0..path_size] of scaled; {knot differences} @!psi:array[1..path_size] of angle; {turning angles} @ @= @!k,@!n:0..path_size; {current and final knot numbers} @y @!delta_x:^scaled; {knot differences} @!delta_y:^scaled; {knot differences} @!delta:^scaled; {knot differences} @!psi:^angle; {turning angles} @ @= @!k,@!n:0..sup_path_size; {current and final knot numbers} @z @x [18.304] l.6544 - Make path_size a configuration option. @!theta:array[0..path_size] of angle; {values of $\theta_k$} @!uu:array[0..path_size] of fraction; {values of $u_k$} @!vv:array[0..path_size] of angle; {values of $v_k$} @!ww:array[0..path_size] of fraction; {values of $w_k$} @ Our immediate problem is to get the ball rolling by setting up the first equation or by realizing that no equations are needed, and to fit this initialization into a framework suitable for the overall computation. @= @t\4@>@@; procedure solve_choices(@!p,@!q:pointer;@!n:halfword); label found,exit; var @!k:0..path_size; {current knot number} @y @!theta:^angle; {values of $\theta_k$} @!uu:^fraction; {values of $u_k$} @!vv:^angle; {values of $v_k$} @!ww:^fraction; {values of $w_k$} @ Our immediate problem is to get the ball rolling by setting up the first equation or by realizing that no equations are needed, and to fit this initialization into a framework suitable for the overall computation. @= @t\4@>@@; procedure solve_choices(@!p,@!q:pointer;@!n:halfword); label found,exit; var @!k:0..sup_path_size; {current knot number} @z @x [27.585] l.11443 - data for file:line:error style. @!mpx_name : array[0..max_in_open] of halfword; @y @!mpx_name : array[0..max_in_open] of halfword; @!source_filename_stack : ^str_number; @!full_source_filename_stack : ^str_number; @z @x [35.745] area and extension rules. @ 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. Note that these variables cannot be of type |pool_pointer| because a string pool compaction could occur while scanning a file name. @= @!area_delimiter:integer; {most recent `\.>' or `\.:' relative to |str_start[str_ptr]|} @!ext_delimiter:integer; {the relevant `\..', if any} @y @ The file names we shall deal with 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. Note that these variables cannot be of type |pool_pointer| because a string pool compaction could occur while scanning a file name. @= @!area_delimiter:integer; {most recent `\./' relative to |str_start[str_ptr]|} @!ext_delimiter:integer; {the relevant `\..', if any} @z @x [35.746] MP and MF area directories. @d MP_area=="MPinputs:" @.MPinputs@> @d MF_area=="MFinputs:" @.MFinputs@> @d MP_font_area=="TeXfonts:" @.TeXfonts@> @y In C, the default paths are specified separately. @z @x [35.747] filenames: quoted area_delimiter:=-1; ext_delimiter:=-1; @y area_delimiter:=-1; ext_delimiter:=-1; quoted_filename:=false; @z @x [35.748] (more_name) Generalize directory separators. begin if c=" " then more_name:=false else begin if (c=">")or(c=":") then @y begin if c="""" then begin quoted_filename:=not quoted_filename; more_name:=true; end else if ((c=" ")or(c=tab)) and stop_at_space and (not quoted_filename) then more_name:=false else begin if IS_DIR_SEP (c) then @z @x [still 35.748] Last (not first) . is extension. else if (c=".")and(ext_delimiter<0) then @y else if (c=".") then @z @x [35.749] (end_name) Quote name if necessary. procedure end_name; var a,@!n,@!e:pool_pointer; {length of area, name, and extension} begin e:=pool_ptr-str_start[str_ptr]; {total length} @y procedure end_name; var a,@!n,@!e:pool_pointer; {length of area, name, and extension} @!j,@!s,@!t:pool_pointer; {running indices} @!must_quote:boolean; {whether we need to quote a string} begin str_room(6); {room for quotes} if area_delimiter<>-1 then begin {maybe quote |cur_area|} must_quote:=false; s:=str_start[str_ptr]; t:=str_start[str_ptr]+area_delimiter+1; j:=s; while (not must_quote) and (j<>t) do begin must_quote:=str_pool[j]=" "; incr(j); end; if must_quote then begin for j:=pool_ptr-1 downto t do str_pool[j+2]:=str_pool[j]; str_pool[t+1]:=""""; for j:=t-1 downto s do str_pool[j+1]:=str_pool[j]; str_pool[s]:=""""; if ext_delimiter<>-1 then ext_delimiter:=ext_delimiter+2; area_delimiter:=area_delimiter+2; pool_ptr:=pool_ptr+2; end; s:=str_start[str_ptr]+area_delimiter+1; end else begin s:=str_start[str_ptr]; end; {maybe quote |cur_name|} if ext_delimiter=-1 then t:=pool_ptr else t:=str_start[str_ptr]+ext_delimiter; must_quote:=false; j:=s; while (not must_quote) and (j<>t) do begin must_quote:=str_pool[j]=" "; incr(j); end; if must_quote then begin for j:=pool_ptr-1 downto t do str_pool[j+2]:=str_pool[j]; str_pool[t+1]:=""""; for j:=t-1 downto s do str_pool[j+1]:=str_pool[j]; str_pool[s]:=""""; if ext_delimiter<>-1 then ext_delimiter:=ext_delimiter+2; pool_ptr:=pool_ptr+2; end; if ext_delimiter<>-1 then begin {maybe quote |cur_ext|} s:=str_start[str_ptr]+ext_delimiter; t:=pool_ptr; must_quote:=false; j:=s; while (not must_quote) and (j<>t) do begin must_quote:=str_pool[j]=" "; incr(j); end; if must_quote then begin str_pool[t+1]:=""""; for j:=t-1 downto s do str_pool[j+1]:=str_pool[j]; str_pool[s]:=""""; pool_ptr:=pool_ptr+2; end; end; e:=pool_ptr-str_start[str_ptr]; {total length} @z @x [35.750] print_file_name begin print(a); print(n); print(e); @y var must_quote: boolean; {whether to quote the filename} @!j:pool_pointer; {index into |str_pool|} begin must_quote:=false; if a>0 then begin j:=str_start[a]; while (not must_quote) and (j<>str_stop(a)) do begin must_quote:=str_pool[j]=" "; incr(j); end; end; if n>0 then begin j:=str_start[n]; while (not must_quote) and (j<>str_stop(n)) do begin must_quote:=str_pool[j]=" "; incr(j); end; end; if e>0 then begin j:=str_start[e]; while (not must_quote) and (j<>str_stop(e)) do begin must_quote:=str_pool[j]=" "; incr(j); end; end; if must_quote then print(""""); if a>0 then for j:=str_start[a] to str_stop(a)-1 do if so(str_pool[j])<>"""" then print(so(str_pool[j])); if n>0 then for j:=str_start[n] to str_stop(n)-1 do if so(str_pool[j])<>"""" then print(so(str_pool[j])); if e>0 then for j:=str_start[e] to str_stop(e)-1 do if so(str_pool[j])<>"""" then print(so(str_pool[j])); if must_quote then print(""""); @z @x [35.751] macro used in pack_file_name @d append_to_name(#)==begin c:=#; incr(k); if k<=file_name_size then name_of_file[k]:=xchr[c]; end @y @d append_to_name(#)==begin c:=#; if not (c="""") then begin incr(k); if k<=file_name_size then name_of_file[k]:=xchr[c]; end end @z @x [35.751] (pack_file_name) malloc and null terminate name_of_file. for j:=str_start[a] to str_stop(a)-1 do append_to_name(so(str_pool[j])); @y if name_of_file then libc_free (name_of_file); name_of_file := xmalloc_array (ASCII_code, length(a)+length(n)+length(e)+1); for j:=str_start[a] to str_stop(a)-1 do append_to_name(so(str_pool[j])); @z @x for k:=name_length+1 to file_name_size do name_of_file[k]:=' '; @y name_of_file[name_length + 1] := 0; @z @x [35.752] default mem area is nonexistent @d mem_default_length=15 {length of the |MP_mem_default| string} @d mem_area_length=6 {length of its area part} @y @d mem_area_length=0 {no fixed area in C} @z @x [35.753] Where `plain.mem' is. @!MP_mem_default:packed array[1..mem_default_length] of char; @ @= MP_mem_default:='MPlib:plain.mem'; @.MPlib@> @.plain@> @^system dependencies@> @y @!mem_default_length: integer; @!MP_mem_default: ^char; @!troff_mode:boolean; {has the user requested \.{troff} mode?} @ We set the name of the default format file and the length of that name in \.{texmfmp.c}, since we want them to depend on the name of the program. @z @x [35.755] Change to pack_buffered_name as with pack_file_name. for j:=1 to n do append_to_name(xord[MP_mem_default[j]]); @y if name_of_file then libc_free (name_of_file); name_of_file := xmalloc_array (ASCII_code, n+(b-a+1)+mem_ext_length+1); for j:=1 to n do append_to_name(xord[MP_mem_default[j]]); @z % @x [35.755] Set program name to match format. % for j:=a to b do append_to_name(buffer[j]); % @y % for j:=a to b do append_to_name(buffer[j]); % name_of_file[k+1]:=0; % kpse_reset_program_name(name_of_file+1);{set search path to match format} % @z @x [35.755] Change to pack_buffered_name as with pack_file_name. for k:=name_length+1 to file_name_size do name_of_file[k]:=' '; @y name_of_file[name_length + 1] := 0; @z @x [35.756] Mem file opening: only try once, with path searching. pack_buffered_name(0,loc,j-1); {try first without the system file area} if w_open_in(mem_file) then goto found; pack_buffered_name(mem_area_length,loc,j-1); {now try the system mem file area} if w_open_in(mem_file) then goto found; @y pack_buffered_name(0,loc,j-1); if w_open_in(mem_file) then goto found; @z @x [still 35.756] Replace `PLAIN' in error messages with `default'. wterm_ln('Sorry, I can''t find that mem file;',' will try PLAIN.'); @y wterm ('Sorry, I can''t find the mem file `'); fputs (stringcast(name_of_file + 1), stdout); wterm ('''; will try `'); fputs (MP_mem_default + 1, stdout); wterm_ln ('''.'); @z @x wterm_ln('I can''t find the PLAIN mem file!'); @.I can't find PLAIN...@> @y wterm ('I can''t find the mem file `'); fputs (MP_mem_default + 1, stdout); wterm_ln ('''!'); @.I can't find the mem...@> @z @x [35.758] Make scan_file_name ignore leading tabs as well as spaces. @p procedure scan_file_name; label done; begin begin_name; while buffer[loc]=" " do incr(loc); @y @p procedure scan_file_name; label done; begin begin_name; while (buffer[loc]=" ")or(buffer[loc]=tab) do incr(loc); @z @x [35.760] `logname' is declared in on some systems. `\.{.mem}' and `\.{.tfm}' in order to make the names of \MP's output files. @y `\.{.mem}' and `\.{.tfm}' in order to make the names of \MP's output files. @d log_name == texmf_log_name @z @x [35.763] prompt_file_name: avoid empty filenames. var @!k:0..buf_size; {index into |buffer|} @y var @!k:0..buf_size; {index into |buffer|} @!saved_cur_name:str_number; {to catch empty terminal input} @z @x [35.763] prompt_file_name: avoid empty filenames. clear_terminal; prompt_input(": "); @; if cur_ext="" then cur_ext:=e; @y saved_cur_name:=cur_name; clear_terminal; prompt_input(": "); @; if cur_ext="" then cur_ext:=e; if length(cur_name)=0 then cur_name:=saved_cur_name; @z @x [35.764] needs similar leading tab treatment. @ @= begin begin_name; k:=first; while (buffer[k]=" ")and(k= begin begin_name; k:=first; while ((buffer[k]=" ")or(buffer[k]=tab))and(k0 then begin if str_vs_str(s,rd_fname[n0])=0 then begin a_close(rd_file[n0]); delete_str_ref(rd_fname[n0]); rd_fname[n0]:=0; if n0=read_files-1 then read_files:=n0; goto done; end; end; end; done: do_nothing; agima@; while not open_out_name_ok(stringcast(name_of_file+1)) or not a_open_out(wr_file[n]) do prompt_file_name("file name for write output",""); wr_fname[n]:=s; add_str_ref(s); {If on first line of input, log file is not ready yet, so don't log.} if log_opened then begin old_setting:=selector; if (internal[tracing_online]<=0) then selector:=log_only {Show what we're doing in the log file.} else selector:=term_and_log; {Show what we're doing.} print_nl("write"); print_int(n); print(" = `"); print_file_name(cur_name,cur_area,cur_ext); print("'."); print_nl(""); print_ln; selector:=old_setting; end; end; @z @x [41.1040] if batchmode, MakeTeX... scripts should be silent. mode_command: begin print_ln; interaction:=cur_mod; @y mode_command: begin print_ln; interaction:=cur_mod; if interaction = batch_mode then kpse_make_tex_discard_errors := 1 else kpse_make_tex_discard_errors := 0; @z @x [42.1151] Fix `threshold' conflict with local variable name. @p function threshold(@!m:integer):scaled; var @!d:scaled; {lower bound on the smallest interval size} begin excess:=min_cover(0)-m; if excess<=0 then threshold:=0 else begin repeat d:=perturbation; until min_cover(d+d)<=m; while min_cover(d)>m do d:=perturbation; threshold:=d; end; end; @y @p function compute_threshold(@!m:integer):scaled; var @!d:scaled; {lower bound on the smallest interval size} begin excess:=min_cover(0)-m; if excess<=0 then compute_threshold:=0 else begin repeat d:=perturbation; until min_cover(d+d)<=m; while min_cover(d)>m do d:=perturbation; compute_threshold:=d; end; end; @z @x [42.1152] Change the call to the threshold function. begin d:=threshold(m); perturbation:=0; @y begin d:=compute_threshold(m); perturbation:=0; @z @x [45.1164] Writing the tfm file. @d tfm_out(#)==write(tfm_file,#) {output one byte to |tfm_file|} @p procedure tfm_two(@!x:integer); {output two bytes to |tfm_file|} begin tfm_out(x div 256); tfm_out(x mod 256); end; @# procedure tfm_four(@!x:integer); {output four bytes to |tfm_file|} begin if x>=0 then tfm_out(x div three_bytes) else begin x:=x+@'10000000000; {use two's complement for negative values} x:=x+@'10000000000; tfm_out((x div three_bytes) + 128); end; x:=x mod three_bytes; tfm_out(x div unity); x:=x mod unity; tfm_out(x div @'400); tfm_out(x mod @'400); end; @# procedure tfm_qqqq(@!x:four_quarters); {output four quarterwords to |tfm_file|} @y The default definitions don't work. Why not? So use C macros. @d tfm_out(#) == put_byte (#, tfm_file) @d tfm_two(#) == put_2_bytes (tfm_file, #) @d tfm_four(#) == put_4_bytes (tfm_file, #) @p procedure tfm_qqqq(@!x:four_quarters); {output four quarterwords to |tfm_file|} @z @x [42.1165] print_file_name print_nl("Font metrics written on "); print(metric_file_name); print_char("."); @y print_nl("Font metrics written on "); print_file_name(0,metric_file_name,0); print_char("."); @z % [43.1182] [See TeX module 564] Reading tfm files. As a special case, % whenever we open a tfm file for input, we read its first byte into % "tfm_temp" right away. @x @d tfget==get(tfm_infile) @d tfbyte==tfm_infile^ @y @d tfget==tfm_temp:=getc(tfm_infile) @d tfbyte==tfm_temp @z % [43.1186] [See TeX module 575] We only want `eof' on the TFM file % to be true if we previously had EOF, not if we're at EOF now. % This is like `feof', and unlike our implementation of `eof' elsewhere. @x if eof(tfm_infile) then goto bad_tfm; @y if feof(tfm_infile) then goto bad_tfm; @z % [43.1188] [See TeX module 563] TFM file opening. @x if cur_area="" then cur_area:=MP_font_area; if cur_ext="" then cur_ext:=".tfm"; pack_cur_name; @y if cur_ext="" then cur_ext:=".tfm"; pack_cur_name; @z @x [43.1195] [Unique to MP] Path selector for |a_open_in| of ps_tab_file. begin name_of_file:=ps_tab_name; if a_open_in(ps_tab_file) then @y begin name_length := strlen (ps_tab_name); name_of_file := xmalloc_array (ASCII_code, name_length+1); strcpy (stringcast(name_of_file+1), ps_tab_name); {copy the string} if a_open_in(ps_tab_file, kpse_fontmap_format) then @z @x [43.1198] Allow blank lines and comment lines in |ps_tab_file|. @ @= str_room(lmax); j:=lmax; loop @+begin if eoln(ps_tab_file) then fatal_error("The psfont map file is bad!"); read(ps_tab_file,c); if c=' ' then goto done; @y @ If we encounter the end of line before we have started reading characters from |ps_tab_file|, we have found an entirely blank line and we skip over it. Otherwise, we abort if the line ends prematurely. If we encounter a comment character, we also skip over the line, since recent versions of \.{dvips} allow comments in the font map file. @= str_room(lmax); j:=lmax; loop @+begin if eoln(ps_tab_file) then if j=lmax then begin flush_cur_string; goto common_ending; {skip over blank line} end else fatal_error("The psfonts.map file is bad!"); read(ps_tab_file,c); if ((c='%')or(c='*')or(c=';')or(c='#')) then begin flush_cur_string; goto common_ending; {skip over comment line} end; if ((c=' ')or(c=tab)) then goto done; @z @x [43.1199] Allow tabs as field seperators in |ps_tab_file|. repeat if eoln(ps_tab_file) then fatal_error("The psfont map file is bad!"); read(ps_tab_file,c); until c<>' '; repeat decr(j); if j<0 then fatal_error("The psfont map file is bad!"); append_char(xord[c]); if eoln(ps_tab_file) then c:=' ' @+else read(ps_tab_file,c); until c=' '; @y repeat if eoln(ps_tab_file) then fatal_error("The psfonts.map file is bad!"); read(ps_tab_file,c); until ((c<>' ')and(c<>tab)); repeat decr(j); if j<0 then fatal_error("The psfonts.map file is bad!"); append_char(xord[c]); if eoln(ps_tab_file) then c:=' ' @+else read(ps_tab_file,c); until ((c=' ')or(c=tab)); @z @x [44.1208] l.21341 - i18n fix print(" output file"); if total_shipped>1 then print_char("s"); @y print(" output "); if total_shipped>1 then print("files") else print("file"); @z @x [44.1208] print_file_name print(first_file_name); @y print_file_name(0,first_file_name,0); @z @x [44.1208 print_file_name print(last_file_name); @y print_file_name(0,last_file_name,0); @z @x [45.1279] INI = VIR. mem_ident:=" (INIMP)"; @y if ini_version then mem_ident:=" (INIMP)"; @z @x [45.1280] Add base_engine. @!w: four_quarters; {four ASCII codes} @y @!w: four_quarters; {four ASCII codes} @!base_engine: ^text_char; @z @x [45.1281] Add base_engine. @!w: four_quarters; {four ASCII codes} @y @!w: four_quarters; {four ASCII codes} @!base_engine: ^text_char; @!dummy_xord: ASCII_code; @!dummy_xchr: text_char; @!dummy_xprn: ASCII_code; @z @x [45.1282] Reading and writing of `mem_file' done in C. @d dump_wd(#)==begin mem_file^:=#; put(mem_file);@+end @d dump_int(#)==begin mem_file^.int:=#; put(mem_file);@+end @d dump_hh(#)==begin mem_file^.hh:=#; put(mem_file);@+end @d dump_qqqq(#)==begin mem_file^.qqqq:=#; put(mem_file);@+end @y @z @x [45.1283] @d undump_wd(#)==begin get(mem_file); #:=mem_file^;@+end @d undump_int(#)==begin get(mem_file); #:=mem_file^.int;@+end @d undump_hh(#)==begin get(mem_file); #:=mem_file^.hh;@+end @d undump_qqqq(#)==begin get(mem_file); #:=mem_file^.qqqq;@+end @y @z @x [45.1284] dump_int(@$);@/ @y dump_int(@"57324D50); {Web2C \MP's magic constant: "W2MP"} {Align engine to 4 bytes with one or more trailing NUL} x:=strlen(engine_name); base_engine:=xmalloc_array(text_char,x+4); strcpy(stringcast(base_engine), engine_name); for k:=x to x+3 do base_engine[k]:=0; x:=x+4-(x mod 4); dump_int(x);dump_things(base_engine[0], x); libc_free(base_engine);@/ dump_int(@$);@/ dump_int(main_memory);@/ @; @z @x [45.1285] Avoid Pascal file convention. x:=mem_file^.int; if x<>@$ then goto off_base; {check that strings are the same} undump_int(x); if x<>mem_min then goto off_base; undump_int(x); if x<>mem_top then goto off_base; @y undump_int(x); if x<>@"57324D50 then goto off_base; {not a base file} undump_int(x); if (x<0) or (x>256) then goto off_base; {corrupted base file} base_engine:=xmalloc_array(text_char, x); undump_things(base_engine[0], x); base_engine[x-1]:=0; {force string termination, just in case} if strcmp(engine_name, stringcast(base_engine)) then begin wake_up_terminal; wterm_ln('---! ', stringcast(name_of_file+1), ' was written by ', base_engine); libc_free(base_engine); goto off_base; end; libc_free(base_engine); undump_int(x); if x<>@$ then begin {check that strings are the same} wake_up_terminal; wterm_ln('---! ', stringcast(name_of_file+1), ' doesn''t match pool strings'); goto off_base; end; undump_int(x); if x<>main_memory then goto off_base; @; undump_int(x); if x<>mem_min then goto off_base; {Dynamic allocation \`a la \.{mf.ch}.} @+init if ini_version then begin {We allocated these at start-up, but now we need to reallocate.} libc_free (mem); libc_free (str_ref); libc_free (next_str); libc_free (str_start); libc_free (str_pool); end; @+tini undump_int(mem_top); if mem_max < mem_top then mem_max:=mem_top; {Use at least what we dumped.} if mem_min+1100>mem_top then goto off_base; mem_max := mem_top + extra_mem_top; mem:=xmalloc_array (memory_word, mem_max - mem_min + 1); @z @x [45.1287] String pool undumping is dynamic. undump_size(0)(pool_size)('string pool size')(pool_ptr); undump_size(0)(max_strings-1)('max strings')(max_str_ptr); @y undump_size(0)(sup_pool_size-pool_free)('string pool size')(pool_ptr); if pool_size < pool_ptr + pool_free then pool_size := pool_ptr+pool_free; undump_size(0)(sup_max_strings)('max strings')(max_str_ptr); @/ str_ref:=xmalloc_array (str_ref_type, max_strings); next_str:=xmalloc_array (str_number, max_strings); str_start:=xmalloc_array (pool_pointer, max_strings); str_pool:=xmalloc_array (pool_ASCII_code, pool_size); @z @x [45.1293] l.22667 - Allow command line to override dumped value. undump(batch_mode)(error_stop_mode)(interaction); @y undump(batch_mode)(error_stop_mode)(interaction); if interaction_option<>unspecified_mode then interaction:=interaction_option; @z @x [45.1293] eof is like feof here. undump_int(x);@+if (x<>69073)or eof(mem_file) then goto off_base @y undump_int(x);@+if (x<>69073)or feof(mem_file) then goto off_base @z @x [45.1294] Eliminate probably-wrong word `preloaded' from mem_idents. print(" (preloaded mem="); print(job_name); print_char(" "); print_int(round_unscaled(internal[year]) mod 100); print_char("."); @y print(" (mem="); print(job_name); print_char(" "); print_int(round_unscaled(internal[year])); print_char("."); @z @x [46.1298] Dynamic allocation. @p begin @!{|start_here|} @y @d const_chk(#) == begin if # < inf@&# then # := inf@&# else if # > sup@&# then # := sup@&# end {|setup_bound_var| stuff duplicated in \.{tex.ch}.} @d setup_bound_var(#) == bound_default := #; setup_bound_var_end @d setup_bound_var_end(#) == bound_name := #; setup_bound_var_end_end @d setup_bound_var_end_end(#) == setup_bound_variable (address_of (#), bound_name, bound_default); @p begin @!{|start_here|} {See comments in \.{tex.ch} for why the name has to be duplicated.} setup_bound_var (250000)('main_memory')(main_memory); {|memory_word|s for |mem| in \.{INIMP}} setup_bound_var (0)('extra_mem_top')(extra_mem_top); {increase high mem in \.{VIRMP}} setup_bound_var (100000)('pool_size')(pool_size); setup_bound_var (75000)('string_vacancies')(string_vacancies); setup_bound_var (3000)('buf_size')(buf_size); setup_bound_var (2000)('path_size')(path_size); setup_bound_var (5000)('pool_free')(pool_free); {min pool avail after fmt} setup_bound_var (15000)('max_strings')(max_strings); setup_bound_var (79)('error_line')(error_line); setup_bound_var (50)('half_error_line')(half_error_line); setup_bound_var (79)('max_print_line')(max_print_line); if error_line > ssup_error_line then error_line := ssup_error_line; const_chk (main_memory); @+init if ini_version then extra_mem_top := 0; @+tini if extra_mem_top>sup_main_memory then extra_mem_top:=sup_main_memory; mem_top := mem_min + main_memory - 1; mem_max := mem_top; const_chk (pool_size); const_chk (string_vacancies); const_chk (buf_size); const_chk (path_size); const_chk (pool_free); const_chk (max_strings); buffer:=xmalloc_array (ASCII_code, buf_size); delta_x:=xmalloc_array (scaled, path_size); delta_y:=xmalloc_array (scaled, path_size); delta:=xmalloc_array (scaled, path_size); psi:=xmalloc_array (angle, path_size); theta:=xmalloc_array (angle, path_size); uu:=xmalloc_array (fraction, path_size); vv:=xmalloc_array (angle, path_size); ww:=xmalloc_array (fraction, path_size); source_filename_stack:=xmalloc_array (str_number, max_in_open); full_source_filename_stack:=xmalloc_array (str_number, max_in_open); @+init if ini_version then begin mem:=xmalloc_array (memory_word, mem_top - mem_min + 1); str_ref:=xmalloc_array (str_ref_type, max_strings); next_str:=xmalloc_array (str_number, max_strings); str_start:=xmalloc_array (pool_pointer, max_strings); str_pool:=xmalloc_array (pool_ASCII_code, pool_size); end; @+tini @z @x [46.1298] Only do get_strings_started etc. if ini. @!init if not get_strings_started then goto final_end; init_tab; {initialize the tables} init_prim; {call |primitive| for each primitive} init_str_use:=str_ptr; init_pool_ptr:=pool_ptr;@/ max_str_ptr:=str_ptr; max_pool_ptr:=pool_ptr; fix_date_and_time; @y @!init if ini_version then begin if not get_strings_started then goto final_end; init_tab; {initialize the tables} init_prim; {call |primitive| for each primitive} init_str_use:=str_ptr; init_pool_ptr:=pool_ptr;@/ max_str_ptr:=str_ptr; max_pool_ptr:=pool_ptr; fix_date_and_time; end; @z @x [46.1298] Set internal[prologues] in troff mode. history:=spotless; {ready to go!} @y history:=spotless; {ready to go!} if troff_mode then begin internal[gtroffmode]:=unity; internal[prologues]:=unity; end; @z @x [46.1298] Call do_final_end. end_of_MP: close_files_and_terminate; final_end: ready_already:=0; @y close_files_and_terminate; final_end: do_final_end; @z @x [46.1299] Print new line before termination; maybe switch to editor. print(log_name); print_char("."); end; end; @y print_file_name(0,log_name,0); print_char("."); end; end; print_ln; if (edit_name_start<>0) and (interaction>batch_mode) then call_edit(str_pool,edit_name_start,edit_name_length,edit_line); @z @x [46.1304] (final_cleanup) Only do dump if ini. begin @!init store_mem_file; return;@+tini@/ @y begin @!init if ini_version then begin store_mem_file; return;end;@+tini@/ @z @x [46.1306] l.22937 - Handle %&mem line if (mem_ident=0)or(buffer[loc]="&") then @y if (mem_ident=0)or(buffer[loc]="&")or dump_line then @z @x [46.1307] l.23004 sys_random_seed := (internal[time] div unity)+internal[day];@/ @y sys_random_seed := get_random_seed;@/ @z @x [47.1307] Change read of integer. read(term_in,m); if m<0 then return else if m=0 then begin goto breakpoint;@\ {go to every label at least once} breakpoint: m:=0; @{'BREAKPOINT'@}@\ end else begin read(term_in,n); @y m:=input_int (stdin); if m<0 then return else if m=0 then begin goto breakpoint;@\ {go to every label at least once} breakpoint: m:=0; @{'BREAKPOINT'@}@\ end else begin n:=input_int (stdin); @z @x [47.1308] 13: begin read(term_in,l); print_cmd_mod(n,l); @y 13: begin l:=input_int (stdin); print_cmd_mod(n,l); @z @x [48.1309] Add editor-switch variable to globals. This section should be replaced, if necessary, by any special modification of the program that are necessary to make \MP\ 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 published 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 Here are the variables used to hold ``switch-to-editor'' information. @^system dependencies@> @= @!edit_name_start: pool_pointer; @!edit_name_length,@!edit_line: integer; @!xprn: array[ASCII_code] of ASCII_code; {use \.{\^\^} notation?} @!stop_at_space: boolean; {whether |more_name| returns false for space} @ The |edit_name_start| will be set to point into |str_pool| somewhere after its beginning if \MP\ is supposed to switch to an editor on exit. @= edit_name_start:=0; stop_at_space:=true; @ Dumping the |xord|, |xchr|, and |xprn| arrays. We dump these always in the format, so a TCX file loaded during format creation can set a default for users of the format. @= dump_things(xord[0], 256); dump_things(xchr[0], 256); dump_things(xprn[0], 256); @ Undumping the |xord|, |xchr|, and |xprn| arrays. This code is more complicated, because we want to ensure that a TCX file specified on the command line will override whatever is in the format. Since the tcx file has already been loaded, that implies throwing away the data in the format. Also, if no |translate_filename| is given, but |eight_bit_p| is set we have to make all characters printable. @= if translate_filename then begin for k:=0 to 255 do undump_things(dummy_xord, 1); for k:=0 to 255 do undump_things(dummy_xchr, 1); for k:=0 to 255 do undump_things(dummy_xprn, 1); end else begin undump_things(xord[0], 256); undump_things(xchr[0], 256); undump_things(xprn[0], 256); if eight_bit_p then for k:=0 to 255 do xprn[k]:=1; end; @ Web2c is deficient, and can only translate pointers to a type identifier, not a general type. Easier, if more annoying, to introduce this extra definition than to fix Web2c. @ = @!str_ref_type = 0..max_str_ref; @z