3 % Copyright 2008 Taco Hoekwater.
\r
5 % This program is free software: you can redistribute it and/or modify
\r
6 % it under the terms of the GNU General Public License as published by
\r
7 % the Free Software Foundation, either version 2 of the License, or
\r
8 % (at your option) any later version.
\r
10 % This program is distributed in the hope that it will be useful,
\r
11 % but WITHOUT ANY WARRANTY; without even the implied warranty of
\r
12 % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\r
13 % GNU General Public License for more details.
\r
15 % You should have received a copy of the GNU General Public License
\r
16 % along with this program. If not, see <http://www.gnu.org/licenses/>.
\r
18 \def\title{Creating mpx files}
\r
19 \def\hang{\hangindent 3em\indent\ignorespaces}
\r
21 \def\LaTeX{{\rm L\kern-.36em\raise.3ex\hbox{\sc a}\kern-.15em
\r
22 T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}}
\r
24 \def\(#1){} % this is used to make section names sort themselves better
\r
25 \def\9#1{} % this is used for sort keys in the index
\r
30 @* \[1] Makempx overview.
\r
32 This source file implements the makempx functionality for the new \MP.
\r
33 It includes all of the functional code from the old standalone programs
\r
40 combined into one, with many changes to make all of the code cooperate
\r
45 The local C preprocessor definitions have to come after the C includes
\r
46 in order to prevent name clashes.
\r
56 #include <errno.h> /* TODO autoconf ? */
\r
57 /* unistd.h is needed for every non-Win32 platform, and we assume
\r
58 * that implies that sys/types.h is also present
\r
61 #include <sys/types.h>
\r
67 #include <process.h>
\r
70 # include <sys/wait.h>
\r
73 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
\r
76 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
\r
84 # include <dirent.h>
\r
86 # define dirent direct
\r
87 # if HAVE_SYS_NDIR_H
\r
88 # include <sys/ndir.h>
\r
91 # include <sys/dir.h>
\r
99 #include <sys/stat.h>
\r
104 #define trunc(x) ((integer) (x))
\r
105 #define fabs(x) ((x)<0?(-(x)):(x))
\r
106 #define floor(x) ((integer) (fabs(x)))
\r
108 #define PI 3.14159265358979323846
\r
111 #include "mpxout.h"
\r
116 From the Pascal code of DVItoMP two implicit types are inherited: |boolean| and
\r
119 The more complex datatypes are defined in the following sections.
\r
125 typedef signed int integer;
\r
126 typedef signed int boolean;
\r
130 @ The single most important data structure is the structure
\r
131 |mpx_data|. It contains all of the global state for a specific
\r
132 |makempx| run. A pointer to it is passed as the first argument to just
\r
133 about every function call.
\r
135 One of the fields is a bit special because it is so important: |mode|
\r
136 is the decider between running \TeX\ or Troff as the typesetting
\r
144 typedef struct mpx_data * MPX;
\r
146 @ @<C Data Types@>=
\r
147 @<Types in the outer block@>
\r
148 typedef struct mpx_data {
\r
153 @ Here are some macros for common programming idioms.
\r
155 @d MAXINT 0x7FFFFF /* somewhat arbitrary */
\r
157 @d incr(A) (A)=(A)+1 /* increase a variable by unity */
\r
158 @d decr(A) (A)=(A)-1 /* decrease a variable by unity */
\r
160 @ Once an MPX object is allocated, the memory it occupies needs to be
\r
161 initialized to a usable state. This procedure gets things started
\r
164 This function is not allowed to run |mpx_abort| because at this
\r
165 point the jump buffer is not yet initialized, so it should only
\r
166 be used for things that cannot go wrong!
\r
169 static void mpx_initialize (MPX mpx) {
\r
170 memset(mpx,0,sizeof(struct mpx_data));
\r
171 @<Set initial values@>@/
\r
174 @ A global variable |history| keeps track of what type of errors have
\r
175 occurred with the hope that that \MP\ can be warned of any problems.
\r
178 enum mpx_history_states {
\r
179 mpx_spotless=0, /* |history| value when no problems have been found */
\r
180 mpx_cksum_trouble, /* |history| value there have been font checksum mismatches */
\r
181 mpx_warning_given, /* |history| value after a recoverable error */
\r
182 mpx_fatal_error /* |history| value if processing had to be aborted */
\r
190 mpx->history=mpx_spotless;
\r
192 @ The structure has room for the names and the |FILE *| for the
\r
193 input and output files. The most important ones are listed here,
\r
194 the variables for the intermediate files are declared where they
\r
204 int lnno ; /* current line number */
\r
206 @ A set of basic reporting functions.
\r
209 static void mpx_printf(MPX mpx, char *header, char *msg, va_list ap) {
\r
210 fprintf(mpx->errfile, "makempx %s: %s:", header, mpx->mpname);
\r
212 fprintf(mpx->errfile, "%d:", mpx->lnno);
\r
213 fprintf(mpx->errfile, " ");
\r
214 (void)vfprintf(mpx->errfile, msg, ap);
\r
215 fprintf(mpx->errfile, "\n");
\r
219 static void mpx_report(MPX mpx, char *msg, ...) {
\r
221 if (mpx->debug==0) return;
\r
223 mpx_printf(mpx, "debug", msg, ap);
\r
225 if ( mpx->history < mpx_warning_given )
\r
226 mpx->history=mpx_cksum_trouble;
\r
230 static void mpx_warn(MPX mpx, char *msg, ...) {
\r
233 mpx_printf(mpx, "warning", msg, ap);
\r
235 if ( mpx->history < mpx_warning_given )
\r
236 mpx->history=mpx_cksum_trouble;
\r
240 static void mpx_error(MPX mpx, char *msg, ...) {
\r
243 mpx_printf(mpx, "error", msg, ap);
\r
245 mpx->history=mpx_warning_given;
\r
248 @ The program uses a |jump_buf| to handle non-local returns,
\r
249 this is initialized at a single spot: the start of |mp_makempx|.
\r
251 @d mpx_jump_out longjmp(mpx->jump_buf,1)
\r
258 static void mpx_abort(MPX mpx, char *msg, ...) {
\r
261 mpx_printf(mpx, "fatal", msg, ap);
\r
263 mpx->history=mpx_fatal_error;
\r
268 @ @<Install and test the non-local jump buffer@>=
\r
269 if (setjmp(mpx->jump_buf) != 0) {
\r
270 int h = mpx->history;
\r
272 xfree(mpx->maincmd);
\r
273 xfree(mpx->mpname);
\r
274 xfree(mpx->mpxname);
\r
280 static FILE *mpx_xfopen (MPX mpx, char *fname, char *fmode) {
\r
281 FILE *f = fopen(fname,fmode);
\r
283 mpx_abort(mpx,"File open error for %s in mode %s", fname, fmode);
\r
286 static void mpx_fclose (MPX mpx, FILE *file) {
\r
288 (void)fclose(file);
\r
292 @d xfree(A) do { mpx_xfree(A); A=NULL; } while (0)
\r
293 @d xrealloc(P,A,B) mpx_xrealloc(mpx,P,A,B)
\r
294 @d xmalloc(A,B) mpx_xmalloc(mpx,A,B)
\r
295 @d xstrdup(A) mpx_xstrdup(mpx,A)
\r
298 static void mpx_xfree (void *x);
\r
299 static void *mpx_xrealloc (MPX mpx, void *p, size_t nmem, size_t size) ;
\r
300 static void *mpx_xmalloc (MPX mpx, size_t nmem, size_t size) ;
\r
301 static char *mpx_xstrdup(MPX mpX, const char *s);
\r
304 @ The |max_size_test| guards against overflow, on the assumption that
\r
305 |size_t| is at least 31bits wide.
\r
307 @d max_size_test 0x7FFFFFFF
\r
310 static void mpx_xfree (void *x) {
\r
311 if (x!=NULL) free(x);
\r
313 static void *mpx_xrealloc (MPX mpx, void *p, size_t nmem, size_t size) {
\r
315 if ((max_size_test/size)<nmem) {
\r
316 mpx_abort(mpx,"Memory size overflow");
\r
318 w = realloc (p,(nmem*size));
\r
319 if (w==NULL) mpx_abort(mpx,"Out of Memory");
\r
322 static void *mpx_xmalloc (MPX mpx, size_t nmem, size_t size) {
\r
324 if ((max_size_test/size)<nmem) {
\r
325 mpx_abort(mpx,"Memory size overflow");
\r
327 w = malloc (nmem*size);
\r
328 if (w==NULL) mpx_abort(mpx,"Out of Memory");
\r
331 static char *mpx_xstrdup(MPX mpx, const char *s) {
\r
336 if (w==NULL) mpx_abort(mpx,"Out of Memory");
\r
339 @* The command 'newer' became a function.
\r
341 We may have high-res timers in struct stat. If we do, use them.
\r
344 static int mpx_newer(char *source, char *target) {
\r
345 struct stat source_stat, target_stat;
\r
346 #if HAVE_SYS_STAT_H
\r
347 if (stat(target, &target_stat) < 0) return 0; /* true */
\r
348 if (stat(source, &source_stat) < 0) return 1; /* false */
\r
350 if (source_stat.st_mtim.tv_sec > target_stat.st_mtim.tv_sec ||
\r
351 (source_stat.st_mtim.tv_sec == target_stat.st_mtim.tv_sec &&
\r
352 source_stat.st_mtim.tv_nsec >+ target_stat.st_mtim.tv_nsec))
\r
355 if (source_stat.st_mtime >= target_stat.st_mtime)
\r
364 @* Extracting data from \MP\ input.
\r
366 This part of the program transforms a \MP\ input file into a \TeX\ or
\r
367 troff input file by stripping out \.{btex}$\ldots$\.{etex} and
\r
368 \.{verbatimtex}$\ldots$\.{etex} sections.
\r
369 Leading and trailing spaces and tabs are removed from the
\r
370 extracted material and it is surrounded by the preceding and following
\r
371 strings defined immediately below. The input file should be given as
\r
372 argument 1 and the resulting \TeX\ or troff file is written on standard
\r
375 John Hobby wrote the original version, which has since been
\r
376 extensively altered. The current implementation is a bit trickier
\r
377 than I would like, but changing it will take careful study and
\r
378 will likely make it run slower, so I've left it as-is for now.
\r
381 int texcnt ; /* btex..etex blocks so far */
\r
382 int verbcnt ; /* verbatimtex..etex blocks so far */
\r
383 char *bb, *tt, *aa; /* start of before, token, and after strings */
\r
384 char *buf; /* the input line */
\r
387 @ @<Set initial values@>=
\r
388 mpx->bufsize = 1000;
\r
390 @ This function returns NULL on EOF, otherwise it returns |buf|.
\r
393 static char *mpx_getline(MPX mpx, FILE *mpfile) {
\r
398 if (mpx->buf==NULL)
\r
399 mpx->buf = xmalloc(mpx->bufsize,1);
\r
400 while ((c = getc(mpfile)) != EOF && c != '\n' && c != '\r') {
\r
401 mpx->buf[loc++] = c;
\r
402 if (loc == mpx->bufsize) {
\r
403 char *temp = mpx->buf;
\r
404 unsigned n = mpx->bufsize + (mpx->bufsize>>4);
\r
406 mpx_abort(mpx,"Line is too long");
\r
407 mpx->buf = xmalloc(n,1);
\r
408 memcpy(mpx->buf,temp,mpx->bufsize);
\r
424 @ Return nonzero if a prefix of string $s$ matches the null-terminated string $t$
\r
425 and the next character is not a letter or an underscore.
\r
428 static int mpx_match_str(char *s, char *t) {
\r
435 if ((*s>= 'a' && *s<='z') || (*s>= 'A' && *s<='Z') || *s == '_')
\r
441 @ This function tries to express $s$ as the concatenation of three
\r
442 strings $b$, $t$, $a$, with the global pointers $bb$, $tt$, and $aa$ set to the
\r
443 start of the corresponding strings. String $t$ is either a quote mark,
\r
444 a percent sign, or an alphabetic token \.{btex}, \.{etex}, or
\r
445 \.{verbatimtex}. (An alphabetic token is a maximal sequence of letters
\r
446 and underscores.) If there are several possible substrings $t$, we
\r
447 choose the leftmost one. If there is no such $t$, we set $b=s$ and return 0.
\r
450 static int mpx_getbta(MPX mpx, char *s) {
\r
451 int ok = 1; /* zero if last character was |a-z|, |A-Z|, or |_| */
\r
453 for (mpx->tt = mpx->bb; *(mpx->tt) != 0; mpx->tt++) {
\r
454 switch (*(mpx->tt)) {
\r
457 mpx->aa = mpx->tt + 1;
\r
460 if (ok && mpx_match_str(mpx->tt, "btex")) {
\r
461 mpx->aa = mpx->tt + 4;
\r
467 if (ok && mpx_match_str(mpx->tt, "etex")) {
\r
468 mpx->aa = mpx->tt + 4;
\r
474 if (ok && mpx_match_str(mpx->tt, "verbatimtex")) {
\r
475 mpx->aa = mpx->tt + 11;
\r
481 if ((*(mpx->tt) >= 'a' && *(mpx->tt) <= 'z') ||
\r
482 (*(mpx->tt) >= 'A' && *(mpx->tt) <= 'Z') ||
\r
483 (*(mpx->tt) == '_'))
\r
494 static void mpx_copy_mpto (MPX mpx, FILE *outfile) {
\r
495 char *s; /* where a string to print stops */
\r
496 char *t; /* for finding start of last line */
\r
500 if (*mpx->aa == 0) {
\r
501 if ((mpx->aa = mpx_getline(mpx,mpx->mpfile)) == NULL) {
\r
502 mpx_error(mpx,"btex section does not end");
\r
505 if (mpx_getbta(mpx, mpx->aa) && *(mpx->tt) == 'e') {
\r
508 if (*(mpx->tt) == 'b')
\r
509 mpx_error(mpx,"btex in TeX mode");
\r
510 if (*(mpx->tt) == 'v')
\r
511 mpx_error(mpx,"verbatimtex in TeX mode");
\r
517 res = xmalloc(strlen(mpx->bb)+2,1);
\r
518 res = strncpy(res,mpx->bb,(strlen(mpx->bb)+1));
\r
520 res = xrealloc(res,strlen(res)+strlen(mpx->bb)+2,1);
\r
521 res = strncat(res,mpx->bb, strlen(mpx->bb));
\r
524 res = strncat(res, "\n", 1);
\r
526 } while (*(mpx->tt) != 'e');
\r
527 /* whitespace at the end */
\r
528 for (s = res + strlen(res) - 1;
\r
529 s >= res && (*s == ' ' || *s == '\t' || *s == '\r' || *s == '\n'); s--);
\r
532 /* whitespace at the start */
\r
534 s < (res + strlen(res)) && (*s == ' ' || *s == '\t' || *s == '\r'
\r
535 || *s == '\n'); s++);
\r
536 for (; *t != '\n' && t > s; t--);
\r
537 fprintf(outfile,"%s", s);
\r
538 /* put no |%| at end if it's only 1 line total, starting with |%|;
\r
539 * this covers the special case |%&format| in a single line. */
\r
540 if (t != s || *t != '%')
\r
541 fprintf(outfile,"%%");
\r
546 @ Static strings for mpto
\r
549 static const char *mpx_predoc[] = {"", ".po 0\n"};
\r
550 static const char *mpx_postdoc[] = { "\\end{document}\n", ""};
\r
551 static const char *mpx_pretex1[] = {
\r
552 "\\gdef\\mpxshipout{\\shipout\\hbox\\bgroup%\n"
\r
553 " \\setbox0=\\hbox\\bgroup}%\n"
\r
554 "\\gdef\\stopmpxshipout{\\egroup"
\r
555 " \\dimen0=\\ht0 \\advance\\dimen0\\dp0\n"
\r
556 " \\dimen1=\\ht0 \\dimen2=\\dp0\n"
\r
557 " \\setbox0=\\hbox\\bgroup\n"
\r
559 " \\ifnum\\dimen0>0 \\vrule width1sp height\\dimen1 depth\\dimen2 \n"
\r
560 " \\else \\vrule width1sp height1sp depth0sp\\relax\n"
\r
562 " \\ht0=0pt \\dp0=0pt \\box0 \\egroup}\n"
\r
563 "\\mpxshipout%% line %d %s\n", ".lf %d %s\n" };
\r
564 static const char *mpx_pretex[] = { "\\mpxshipout%% line %d %s\n", ".bp\n.lf %d %s\n" };
\r
565 static const char *mpx_posttex[] = { "\n\\stopmpxshipout\n", "\n" };
\r
566 static const char *mpx_preverb1[] = {"", ".lf %d %s\n" }; /* if very first instance */
\r
567 static const char *mpx_preverb[] = { "%% line %d %s\n", ".lf %d %s\n"}; /* all other instances */
\r
568 static const char *mpx_postverb[] = { "\n", "\n" } ;
\r
571 static void mpx_mpto(MPX mpx, char *tmpname, char *mptexpre) {
\r
573 int mode = mpx->mode;
\r
574 char *mpname = mpx->mpname;
\r
575 if (mode==mpx_tex_mode) {
\r
576 TMPNAME_EXT(mpx->tex,".tex");
\r
578 TMPNAME_EXT(mpx->tex,".i");
\r
580 outfile = mpx_xfopen(mpx,mpx->tex, "wb");
\r
581 if (mode==mpx_tex_mode) {
\r
583 if ((fr = fopen(mptexpre, "r"))!= NULL) {
\r
584 while (mpx_getline(mpx, fr) != NULL)
\r
585 fputs(mpx->buf, outfile);
\r
586 mpx_fclose(mpx,fr);
\r
589 mpx->mpfile = mpx_xfopen(mpx,mpname, "r");
\r
590 fprintf(outfile,"%s", mpx_predoc[mode]);
\r
591 while (mpx_getline(mpx, mpx->mpfile) != NULL)
\r
593 fprintf(outfile,"%s", mpx_postdoc[mode]);
\r
594 mpx_fclose(mpx,mpx->mpfile);
\r
595 mpx_fclose(mpx,outfile);
\r
602 mpx->aa = mpx->buf;
\r
603 while (mpx_getbta(mpx, mpx->aa)) {
\r
604 if (*(mpx->tt) == '%') {
\r
606 } else if (*(mpx->tt) == '"') {
\r
608 if (!mpx_getbta(mpx, mpx->aa))
\r
609 mpx_error(mpx,"string does not end");
\r
610 } while (*(mpx->tt) != '"');
\r
611 } else if (*(mpx->tt) == 'b') {
\r
612 if (mpx->texcnt++ == 0)
\r
613 fprintf(outfile,mpx_pretex1[mode], mpx->lnno, mpname);
\r
615 fprintf(outfile,mpx_pretex[mode], mpx->lnno, mpname);
\r
616 mpx_copy_mpto(mpx, outfile);
\r
617 fprintf(outfile,"%s", mpx_posttex[mode]);
\r
618 } else if (*(mpx->tt) == 'v') {
\r
619 if (mpx->verbcnt++ == 0 && mpx->texcnt == 0)
\r
620 fprintf(outfile,mpx_preverb1[mode], mpx->lnno, mpname);
\r
622 fprintf(outfile,mpx_preverb[mode], mpx->lnno, mpname);
\r
623 mpx_copy_mpto(mpx, outfile);
\r
624 fprintf(outfile,"%s", mpx_postverb[mode]);
\r
626 mpx_error(mpx,"unmatched etex");
\r
631 @ @<Run |mpto| on the mp file@>=
\r
632 mpx_mpto(mpx, tmpname, mpxopt->mptexpre)
\r
634 @* DVItoMP Processing.
\r
636 The \.{DVItoMP} program reads binary device-independent (``\.{DVI}'')
\r
637 files that are produced by document compilers such as \TeX, and converts them
\r
638 into a symbolic form understood by \MP. It is loosely based on the \.{DVItype}
\r
639 utility program that produces a more faithful symbolic form of a \.{DVI} file.
\r
641 The output file is a sequence of \MP\ picture expressions, one for every page
\r
642 in the \.{DVI} file. It makes no difference to \.{DVItoMP} where the \.{DVI}
\r
643 file comes from, but it is intended to process the result of running \TeX\
\r
644 or \LaTeX\ on the output of the extraction process that is defined above.
\r
645 Such a \.{DVI} file will contain one page for every \.{btex}$\ldots$\.{etex}
\r
646 block in the original input. Processing with \.{DVItoMP} creates a
\r
647 corresponding sequence of \MP\ picture expressions for use as an auxiliary
\r
648 input file. Since \MP\ expects such files to have the extension \.{.MPX},
\r
649 the output of \.{DVItoMP} is sometimes called an ``\.{MPX}'' file.
\r
651 @ The following parameters can be changed at compile time to extend or
\r
652 reduce \.{DVItoMP}'s capacity.
\r
654 TODO: dynamic reallocation
\r
656 @d virtual_space 1000000 /* maximum total bytes of typesetting commands for virtual fonts */
\r
657 @d max_fonts 1000 /* maximum number of distinct fonts per \.{DVI} file */
\r
658 @d max_fnums 3000 /* maximum number of fonts plus fonts local to virtual fonts */
\r
659 @d max_widths (256*max_fonts) /* maximum number of different characters among all fonts */
\r
660 @d line_length 79 /* maximum output line length (must be at least 60) */
\r
661 @d stack_size 100 /* \.{DVI} files shouldn't |push| beyond this depth */
\r
662 @d font_tolerance 0.00001
\r
663 /* font sizes should match to within this multiple of $2^{20}$ \.{DVI} units */
\r
665 @ If the \.{DVI} file is badly malformed, the whole process must be aborted;
\r
666 \.{DVItoMP} will give up, after issuing an error message about the symptoms
\r
669 @d bad_dvi(A) mpx_abort(mpx,"Bad DVI file: " A "!")
\r
670 @d bad_dvi_two(A,B) mpx_abort(mpx,"Bad DVI file: %s !", A, B)
\r
673 @* The character set.
\r
675 Like all programs written with the \.{WEB} system, \.{DVItoMP} can be
\r
676 used with any character set. It an identify transfrom internally, because
\r
677 the programming for portable input-output is easier when a fixed internal
\r
678 code is used, and because \.{DVI} files use ASCII code for file names.
\r
680 In the conversion from Pascal to C, the |xchr| array has been removed.
\r
681 Because some systems may still want to change the input--output character
\r
682 set, the accesses to |xchr| and |printable| are replaced by macro calls.
\r
684 @d printable(c) (isprint(c) && c < 128 && c!='"')
\r
688 static void mpx_open_mpxfile (MPX mpx) { /* prepares to write text on |mpxfile| */
\r
689 mpx->mpxfile = mpx_xfopen (mpx,mpx->mpxname, "wb");
\r
692 @* Device-independent file format.
\r
693 The format of \.{DVI} files is described in many places including
\r
694 \.{dvitype.web} and Volume~B of D.~E. Knuth's {\sl Computers and Typesetting}.
\r
695 This program refers to the following command codes.
\r
697 @d id_byte 2 /* identifies the kind of \.{DVI} files described here */
\r
699 @d set_char_0 0 /* typeset character 0 and move right */
\r
700 @d set1 128 /* typeset a character and move right */
\r
701 @d set_rule 132 /* typeset a rule and move right */
\r
702 @d put1 133 /* typeset a character */
\r
703 @d put_rule 137 /* typeset a rule */
\r
704 @d nop 138 /* no operation */
\r
705 @d bop 139 /* beginning of page */
\r
706 @d eop 140 /* ending of page */
\r
707 @d push 141 /* save the current positions */
\r
708 @d pop 142 /* restore previous positions */
\r
709 @d right1 143 /* move right */
\r
710 @d w0 147 /* move right by |w| */
\r
711 @d w1 148 /* move right and set |w| */
\r
712 @d x0 152 /* move right by |x| */
\r
713 @d x1 153 /* move right and set |x| */
\r
714 @d down1 157 /* move down */
\r
715 @d y0 161 /* move down by |y| */
\r
716 @d y1 162 /* move down and set |y| */
\r
717 @d z0 166 /* move down by |z| */
\r
718 @d z1 167 /* move down and set |z| */
\r
719 @d fnt_num_0 171 /* set current font to 0 */
\r
720 @d fnt1 235 /* set current font */
\r
721 @d xxx1 239 /* extension to \.{DVI} primitives */
\r
722 @d xxx4 242 /* potentially long extension to \.{DVI} primitives */
\r
723 @d fnt_def1 243 /* define the meaning of a font number */
\r
724 @d pre 247 /* preamble */
\r
725 @d post 248 /* postamble beginning */
\r
726 @d post_post 249 /* postamble ending */
\r
727 @d undefined_commands 250: case 251: case 252: case 253: case 254: case 255
\r
729 @* Input from binary files.
\r
731 @ The program deals with two binary file variables: |dvi_file| is the main
\r
732 input file that we are translating into symbolic form, and |tfm_file| is
\r
733 the current font metric file from which character-width information is
\r
734 being read. It is convenient to have a throw-away variable for function
\r
735 results when reading parts of the files that are being skipped.
\r
738 FILE * dvi_file; /* the input file */
\r
739 FILE * tfm_file; /* a font metric file */
\r
740 FILE * vf_file; /* a virtual font file */
\r
742 @ Prepares to read packed bytes in |dvi_file|
\r
744 static void mpx_open_dvi_file (MPX mpx) {
\r
745 mpx->dvi_file = fopen(mpx->dviname,"rb");
\r
746 if (mpx->dvi_file==NULL)
\r
747 mpx_abort(mpx,"DVI generation failed");
\r
750 @ Prepares to read packed bytes in |tfm_file|
\r
752 static boolean mpx_open_tfm_file (MPX mpx) {
\r
753 mpx->tfm_file = mpx_fsearch(mpx, mpx->cur_name, mpx_tfm_format);
\r
754 if (mpx->tfm_file == NULL)
\r
755 mpx_abort(mpx,"Cannot find TFM %s", mpx->cur_name);
\r
756 free (mpx->cur_name); /* We |xmalloc|'d this before we got called. */
\r
757 return true; /* If we get here, we succeeded. */
\r
760 @ Prepares to read packed bytes in |vf_file|.
\r
761 It's ok if the \.{VF} file doesn't exist.
\r
764 static boolean mpx_open_vf_file (MPX mpx) {
\r
765 mpx->vf_file = mpx_fsearch(mpx, mpx->cur_name, mpx_vf_format);
\r
766 if (mpx->vf_file) {
\r
767 free (mpx->cur_name);
\r
773 @ If you looked carefully at the preceding code, you probably asked,
\r
774 ``What is |cur_name|?'' Good question. It's a global
\r
775 variable: |cur_name| is a string variable that will be set to the
\r
776 current font metric file name before |open_tfm_file| or |open_vf_file|
\r
780 char *cur_name; /* external name */
\r
782 @ It turns out to be convenient to read four bytes at a time, when we are
\r
783 inputting from \.{TFM} files. The input goes into global variables
\r
784 |b0|, |b1|, |b2|, and |b3|, with |b0| getting the first byte and |b3|
\r
788 int b0, b1, b2, b3; /* four bytes input at once */
\r
790 @ The |read_tfm_word| procedure sets |b0| through |b3| to the next
\r
791 four bytes in the current \.{TFM} file.
\r
794 static void mpx_read_tfm_word (MPX mpx) {
\r
795 mpx->b0 = getc(mpx->tfm_file);
\r
796 mpx->b1 = getc(mpx->tfm_file);
\r
797 mpx->b2 = getc(mpx->tfm_file);
\r
798 mpx->b3 = getc(mpx->tfm_file);
\r
801 @ Input can come from from three different sources depending on the settings
\r
802 of global variables. When |vf_reading| is true, we read from the \.{VF} file.
\r
803 Otherwise, input can either come directly from |dvi_file| or from a buffer
\r
804 |cmd_buf|. The latter case applies whenever |buf_ptr<virtual_space|.
\r
807 boolean vf_reading; /* should input come from |vf_file|? */
\r
808 unsigned char cmd_buf[(virtual_space+1)]; /* commands for virtual characters */
\r
809 unsigned int buf_ptr; /* |cmd_buf| index for the next byte */
\r
812 mpx->vf_reading=false;
\r
813 mpx->buf_ptr=virtual_space;
\r
815 @ We shall use a set of simple functions to read the next byte or bytes from the
\r
816 current input source. There are seven possibilities, each of which is treated
\r
817 as a separate function in order to minimize the overhead for subroutine calls.
\r
820 static integer mpx_get_byte (MPX mpx) { /* returns the next byte, unsigned */
\r
822 @<Read one byte into |b|@>;
\r
826 static integer mpx_signed_byte (MPX mpx) { /* returns the next byte, signed */
\r
828 @<Read one byte into |b|@>;
\r
829 return ( b<128 ? b : (b-256));
\r
832 static integer mpx_get_two_bytes (MPX mpx) { /* returns the next two bytes, unsigned */
\r
834 a=0; b=0; /* for compiler warnings */
\r
835 @<Read two bytes into |a| and |b|@>;
\r
836 return (a*(int)(256)+b);
\r
839 static integer mpx_signed_pair (MPX mpx) { /* returns the next two bytes, signed */
\r
841 a=0; b=0; /* for compiler warnings */
\r
842 @<Read two bytes into |a| and |b|@>;
\r
843 if ( a<128 ) return (a*256+b);
\r
844 else return ((a-256)*256+b);
\r
847 static integer mpx_get_three_bytes (MPX mpx) { /* returns the next three bytes, unsigned */
\r
848 unsigned char a,b,c;
\r
849 a=0; b=0; c=0; /* for compiler warnings */
\r
850 @<Read three bytes into |a|, |b|, and~|c|@>;
\r
851 return ((a*(int)(256)+b)*256+c);
\r
854 static integer mpx_signed_trio (MPX mpx) { /* returns the next three bytes, signed */
\r
855 unsigned char a,b,c;
\r
856 a=0; b=0; c=0; /* for compiler warnings */
\r
857 @<Read three bytes into |a|, |b|, and~|c|@>;
\r
858 if ( a<128 ) return ((a*(int)(256)+b)*256+c);
\r
859 else return (((a-(int)(256))*256+b)*256+c);
\r
862 static integer mpx_signed_quad (MPX mpx) { /* returns the next four bytes, signed */
\r
863 unsigned char a,b,c,d;
\r
864 a=0; b=0; c=0; d=0; /* for compiler warnings */
\r
865 @<Read four bytes into |a|, |b|, |c|, and~|d|@>;
\r
866 if ( a<128 ) return (((a*(int)(256)+b)*256+c)*256+d);
\r
867 else return ((((a-256)*(int)(256)+b)*256+c)*256+d);
\r
870 @ @<Read one byte into |b|@>=
\r
871 if ( mpx->vf_reading ) {
\r
872 b = (unsigned char)getc(mpx->vf_file);
\r
873 } else if ( mpx->buf_ptr==virtual_space ) {
\r
874 b = (unsigned char)getc(mpx->dvi_file);
\r
876 b=mpx->cmd_buf[mpx->buf_ptr];
\r
877 incr(mpx->buf_ptr);
\r
880 @ @<Read two bytes into |a| and |b|@>=
\r
881 if ( mpx->vf_reading ) {
\r
882 a = (unsigned char)getc(mpx->vf_file);
\r
883 b = (unsigned char)getc(mpx->vf_file);
\r
884 } else if ( mpx->buf_ptr==virtual_space ) {
\r
885 a = (unsigned char)getc(mpx->dvi_file);
\r
886 b = (unsigned char)getc(mpx->dvi_file);
\r
887 } else if ( mpx->buf_ptr+2>mpx->n_cmds ) {
\r
888 mpx_abort(mpx,"Error detected while interpreting a virtual font");
\r
889 @.Error detected while...@>
\r
891 a=mpx->cmd_buf[mpx->buf_ptr];
\r
892 b=mpx->cmd_buf[mpx->buf_ptr+1];
\r
896 @ @<Read three bytes into |a|, |b|, and~|c|@>=
\r
897 if ( mpx->vf_reading ) {
\r
898 a = (unsigned char)getc(mpx->vf_file);
\r
899 b = (unsigned char)getc(mpx->vf_file);
\r
900 c = (unsigned char)getc(mpx->vf_file);
\r
901 } else if ( mpx->buf_ptr==virtual_space ) {
\r
902 a = (unsigned char)getc(mpx->dvi_file);
\r
903 b = (unsigned char)getc(mpx->dvi_file);
\r
904 c = (unsigned char)getc(mpx->dvi_file);
\r
905 } else if ( mpx->buf_ptr+3>mpx->n_cmds ) {
\r
906 mpx_abort(mpx,"Error detected while interpreting a virtual font");
\r
907 @.Error detected while...@>
\r
909 a=mpx->cmd_buf[mpx->buf_ptr];
\r
910 b=mpx->cmd_buf[mpx->buf_ptr+1];
\r
911 c=mpx->cmd_buf[mpx->buf_ptr+2];
\r
915 @ @<Read four bytes into |a|, |b|, |c|, and~|d|@>=
\r
916 if ( mpx->vf_reading ) {
\r
917 a = (unsigned char)getc(mpx->vf_file);
\r
918 b = (unsigned char)getc(mpx->vf_file);
\r
919 c = (unsigned char)getc(mpx->vf_file);
\r
920 d = (unsigned char)getc(mpx->vf_file);
\r
921 } else if ( mpx->buf_ptr==virtual_space ) {
\r
922 a = (unsigned char)getc(mpx->dvi_file);
\r
923 b = (unsigned char)getc(mpx->dvi_file);
\r
924 c = (unsigned char)getc(mpx->dvi_file);
\r
925 d = (unsigned char)getc(mpx->dvi_file);
\r
926 } else if ( mpx->buf_ptr+4>mpx->n_cmds ) {
\r
927 mpx_abort(mpx,"Error detected while interpreting a virtual font");
\r
928 @.Error detected while...@>
\r
930 a=mpx->cmd_buf[mpx->buf_ptr];
\r
931 b=mpx->cmd_buf[mpx->buf_ptr+1];
\r
932 c=mpx->cmd_buf[mpx->buf_ptr+2];
\r
933 d=mpx->cmd_buf[mpx->buf_ptr+3];
\r
937 @* Data structures for fonts.
\r
939 \.{DVI} file format does not include information about character widths, since
\r
940 that would tend to make the files a lot longer. But a program that reads
\r
941 a \.{DVI} file is supposed to know the widths of the characters that appear
\r
942 in \\{set\_char} commands. Therefore \.{DVItoMP} looks at the font metric
\r
943 (\.{TFM}) files for the fonts that are involved.
\r
944 @.TFM {\rm files}@>
\r
946 @ For purposes of this program, the only thing we need to know about a
\r
947 given character |c| in a non-virtual font |f| is the width. For the font as
\r
948 a whole, all we need is the symbolic name to use in the \.{MPX} file.
\r
950 This information appears implicitly in the following data
\r
951 structures. The current number of fonts defined is |nf|. Each such font has
\r
952 an internal number |f|, where |0<=f<nf|. There is also an external number
\r
953 that identifies the font in the \.{DVI} file. The correspondence is
\r
954 maintained in arrays |font_num| and |internal_num| so that |font_num[i]|
\r
955 is the external number for |f=internal_num[i]|.
\r
956 The external name of this font is the string that occupies |font_name[f]|.
\r
957 The legal characters run from |font_bc[f]| to |font_ec[f]|, inclusive.
\r
958 The \.{TFM} file can specify that some of these are invalid, but this doesn't
\r
959 concern \.{DVItoMP} because it does not do extensive error checking.
\r
960 The width of character~|c| in font~|f| is given by
\r
961 |char_width(f,c)=width[info_base[f]+c]|, and |info_ptr| is the
\r
962 first unused position of the |width| array.
\r
964 If font~|f| is a virtual font, there is a list of \.{DVI} commands for each
\r
965 character. These occupy consecutive positions in the |cmd_buf| array with
\r
966 the commands for character~|c| starting at
\r
967 |start_cmd(f,c)=cmd_ptr[info_base[f]+c]| and ending just before
\r
968 |start_cmd(f,c+1)|. Font numbers used when interpreting these \.{DVI}
\r
969 commands occupy positions |fbase[f]| through |ftop[f]-1| in the |font_num|
\r
970 table and the |internal_num| array gives the corresponding internal font
\r
971 numbers. If such an internal font number~|i| does not correspond to
\r
972 some font occuring in the \.{DVI} file, then |font_num[i]| has not been
\r
973 assigned a meaningful value; this is indicated by |local_only[i]=true|.
\r
975 If font~|f| is not virtual, then |fbase[f]=0| and |ftop[f]=0|. The |start_cmd|
\r
976 values are ignored in this case.
\r
978 @d char_width(A,B) mpx->width[mpx->info_base[(A)]+(B)]
\r
979 @d start_cmd(A,B) mpx->cmd_ptr[mpx->info_base[(A)]+(B)]
\r
982 integer font_num[(max_fnums+1)]; /* external font numbers */
\r
983 integer internal_num[(max_fnums+1)]; /* internal font numbers */
\r
984 boolean local_only[(max_fnums+1)]; /* |font_num| meaningless? */
\r
985 char *font_name[(max_fonts+1)]; /* starting positions of external font names */
\r
986 double font_scaled_size[(max_fonts+1)]; /* scale factors over $2^{20}$ */
\r
987 double font_design_size[(max_fonts+1)]; /* design sizes over $2^{20}$ */
\r
988 integer font_check_sum[(max_fonts+1)]; /* check sum from the |font_def| */
\r
989 integer font_bc[(max_fonts+1)]; /* beginning characters in fonts */
\r
990 integer font_ec[(max_fonts+1)]; /* ending characters in fonts */
\r
991 integer info_base[(max_fonts+1)]; /* index into |width| and |cmd_ptr| tables */
\r
992 integer width[(max_widths+1)];
\r
993 /* character widths, in units $2^{-20}$ of design size */
\r
994 integer fbase[(max_fonts+1)]; /* index into |font_num| for local fonts */
\r
995 integer ftop[(max_fonts+1)]; /* |font_num| index where local fonts stop */
\r
996 integer cmd_ptr[(max_widths+1)]; /* starting positions in |cmd_buf| */
\r
997 unsigned int nfonts; /* the number of known fonts */
\r
998 unsigned int vf_ptr; /* next |font_num| entry for virtual font font tables */
\r
999 unsigned int info_ptr; /* allocation pointer for |width| and |cmd_ptr| tables */
\r
1000 unsigned int n_cmds; /* number of occupied cells in |cmd_buf| */
\r
1001 unsigned int cur_fbase, cur_ftop;
\r
1002 /* currently applicable part of the |font_num| table */
\r
1004 @ @<Set init...@>=
\r
1005 mpx->nfonts=0; mpx->info_ptr=0; mpx->font_name[0]=0;
\r
1006 mpx->vf_ptr=max_fnums;
\r
1007 mpx->cur_fbase=0; mpx->cur_ftop=0;
\r
1009 @ Printing the name of a given font is easy except that a procedure |print_char|
\r
1010 is needed to actually send an |ASCII_code| to the \.{MPX} file.
\r
1012 @c @<Declare subroutines for printing strings@>@;
\r
1013 static void mpx_print_font (MPX mpx, integer f) { /* |f| is an internal font number */
\r
1014 if ( (f<0)||(f>=(int)mpx->nfonts) ) {
\r
1015 bad_dvi("Undefined font");
\r
1017 char *s = mpx->font_name[f];
\r
1019 mpx_print_char(mpx,(unsigned char)*s);
\r
1025 @ Sometimes a font name is needed as part of an error message.
\r
1027 @d font_warn(A,B) mpx_warn (mpx,"%s %s",A,mpx->font_name[(B)])
\r
1028 @d font_error(A,B) mpx_error(mpx,"%s %s",A,mpx->font_name[(B)])
\r
1029 @d font_abort(A,B) mpx_abort(mpx,"%s %s",A,mpx->font_name[(B)])
\r
1032 @ When we encounter a font definition, we save the name, checksum, and size
\r
1033 information, but we don't actually read the \.{TFM} or \.{VF} file until we
\r
1034 are about to use the font. If a matching font is not already defined, we then
\r
1035 allocate a new internal font number.
\r
1037 The following subroutine does the necessary things when a \\{fnt\_def} command
\r
1038 is encountered in the \.{DVI} file or in a \.{VF} file. It assumes that the
\r
1039 first argument has already been parsed and is given by the parameter~|e|.
\r
1041 @c @<Declare a function called |match_font|@>@;
\r
1042 static void mpx_define_font (MPX mpx, integer e) { /* |e| is an external font number */
\r
1043 integer i; /* index into |font_num| and |internal_num| */
\r
1044 integer n; /* length of the font name and area */
\r
1045 integer k; /* general purpose loop counter */
\r
1046 integer x; /* a temporary value for scaled size computation */
\r
1047 if ( mpx->nfonts==max_fonts )
\r
1048 mpx_abort(mpx,"DVItoMP capacity exceeded (max fonts=%d)!", max_fonts);
\r
1049 @.DVItoMP capacity exceeded...@>
\r
1050 @<Allocate an index |i| into the |font_num| and |internal_num| tables@>;
\r
1051 @<Read the font parameters into position for font |nf|@>;
\r
1052 mpx->internal_num[i]=mpx_match_font(mpx, mpx->nfonts,true);
\r
1053 if ( mpx->internal_num[i]==(int)mpx->nfonts ) {
\r
1054 mpx->info_base[mpx->nfonts]=max_widths; /* indicate that the info isn't loaded yet */
\r
1055 mpx->local_only[mpx->nfonts]=mpx->vf_reading; incr(mpx->nfonts);
\r
1059 @ @<Allocate an index |i| into the |font_num| and |internal_num| tables@>=
\r
1060 if ( mpx->vf_ptr==mpx->nfonts )
\r
1061 mpx_abort(mpx,"DVItoMP capacity exceeded (max font numbers=%d)", max_fnums);
\r
1062 @.DVItoMP capacity exceeded...@>
\r
1063 if ( mpx->vf_reading ) {
\r
1064 mpx->font_num[mpx->nfonts]=0; i=mpx->vf_ptr; decr(mpx->vf_ptr);
\r
1068 mpx->font_num[i]=e
\r
1070 @ @<Read the font parameters into position for font |nf|@>=
\r
1071 mpx->font_check_sum[mpx->nfonts]=mpx_signed_quad(mpx);
\r
1072 @<Read |font_scaled_size[nf]| and |font_design_size[nf]|@>;
\r
1073 n=mpx_get_byte(mpx); /* that is the area */
\r
1074 n=n+mpx_get_byte(mpx);
\r
1075 mpx->font_name[mpx->nfonts]=xmalloc(n+1,1);
\r
1077 mpx->font_name[mpx->nfonts][k]=mpx_get_byte(mpx);
\r
1078 mpx->font_name[mpx->nfonts][k]=0
\r
1080 @ The scaled size and design size are stored in \.{DVI} units divided by $2^{20}$.
\r
1081 The units for scaled size are a little different if we are reading a virtual
\r
1082 font, but this will be corrected when the scaled size is used. The scaled size
\r
1083 also needs to be truncated to at most 23 significant bits in order to make
\r
1084 the character width calculation match what \TeX\ does.
\r
1086 @<Read |font_scaled_size[nf]| and |font_design_size[nf]|@>=
\r
1087 x=mpx_signed_quad(mpx);
\r
1089 while ( mpx->x>040000000 ) {
\r
1092 mpx->font_scaled_size[mpx->nfonts]=x*k/1048576.0;
\r
1093 if ( mpx->vf_reading )
\r
1094 mpx->font_design_size[mpx->nfonts]=mpx_signed_quad(mpx)*mpx->dvi_per_fix/1048576.0;
\r
1095 else mpx->font_design_size[mpx->nfonts]=mpx_signed_quad(mpx)/1048576.0;
\r
1098 double dvi_per_fix; /* converts points scaled $2^{20}$ to \.{DVI} units */
\r
1100 @ The |match_font| function tries to find a match for the font with internal
\r
1101 number~|ff|, returning |nf| or the number of the matching font. If
\r
1102 |exact=true|, the name and scaled size should match. Otherwise the scaled
\r
1103 size need not match but the font found must be already loaded, not just
\r
1106 @<Declare a function called |match_font|@>=
\r
1107 static integer mpx_match_font (MPX mpx, unsigned ff, boolean exact) {
\r
1108 unsigned f; /* font number being tested */
\r
1109 for (f=0; f<mpx->nfonts ; f++) {
\r
1111 @<Compare the names of fonts |f| and |ff|; |continue| if they differ@>;
\r
1113 if ( fabs(mpx->font_scaled_size[f]-mpx->font_scaled_size[ff])<= font_tolerance ) {
\r
1114 if ( ! mpx->vf_reading ) {
\r
1115 if ( mpx->local_only[f] ) {
\r
1116 mpx->font_num[f]=mpx->font_num[ff]; mpx->local_only[f]=false;
\r
1117 } else if ( mpx->font_num[f]!=mpx->font_num[ff] ) {
\r
1123 } else if ( mpx->info_base[f]!=max_widths ) {
\r
1128 if ( f<mpx->nfonts ) {
\r
1129 @<Make sure fonts |f| and |ff| have matching design sizes and checksums@>;
\r
1134 @ @<Compare the names of fonts |f| and |ff|; |continue| if they differ@>=
\r
1135 if (strcmp(mpx->font_name[f],mpx->font_name[ff]))
\r
1138 @ @<Make sure fonts |f| and |ff| have matching design sizes and checksums@>=
\r
1139 if ( fabs(mpx->font_design_size[f]-mpx->font_design_size[ff]) > font_tolerance ) {
\r
1140 font_error("Inconsistent design sizes given for ",ff);
\r
1141 @.Inconsistent design sizes@>
\r
1142 } else if ( mpx->font_check_sum[f]!=mpx->font_check_sum[ff] ) {
\r
1143 font_warn("Checksum mismatch for ", ff);
\r
1144 @.Checksum mismatch@>
\r
1147 @* Reading ordinary fonts.
\r
1148 An auxiliary array |in_width| is used to hold the widths as they are
\r
1149 input. The global variable |tfm_check_sum| is set to the check sum that
\r
1150 appears in the current \.{TFM} file.
\r
1153 integer in_width[256]; /* \.{TFM} width data in \.{DVI} units */
\r
1154 integer tfm_check_sum; /* check sum found in |tfm_file| */
\r
1156 @ Here is a procedure that absorbs the necessary information from a
\r
1157 \.{TFM} file, assuming that the file has just been successfully reset
\r
1158 so that we are ready to read its first byte. (A complete description of
\r
1159 \.{TFM} file format appears in the documentation of \.{TFtoPL} and will
\r
1160 not be repeated here.) The procedure does not check the \.{TFM} file
\r
1161 for validity, nor does it give explicit information about what is
\r
1162 wrong with a \.{TFM} file that proves to be invalid. The procedure simply
\r
1163 aborts the program if it detects anything amiss in the \.{TFM} data.
\r
1166 static void mpx_in_TFM (MPX mpx,integer f) {
\r
1167 /* input \.{TFM} data for font |f| or abort */
\r
1168 integer k; /* index for loops */
\r
1169 int lh; /* length of the header data, in four-byte words */
\r
1170 int nw; /* number of words in the width table */
\r
1171 unsigned wp; /* new value of |info_ptr| after successful input */
\r
1172 @<Read past the header data; |abort| if there is a problem@>;
\r
1173 @<Store character-width indices at the end of the |width| table@>;
\r
1174 @<Read the width values into the |in_width| table@>;
\r
1175 @<Move the widths from |in_width| to |width|@>;
\r
1176 mpx->fbase[f]=0; mpx->ftop[f]=0;
\r
1181 @ @<Read past the header...@>=
\r
1182 mpx_read_tfm_word(mpx); lh=mpx->b2*(int)(256)+mpx->b3;
\r
1183 mpx_read_tfm_word(mpx);
\r
1184 mpx->font_bc[f]=mpx->b0*(int)(256)+mpx->b1;
\r
1185 mpx->font_ec[f]=mpx->b2*(int)(256)+mpx->b3;
\r
1186 if ( mpx->font_ec[f]<mpx->font_bc[f] ) mpx->font_bc[f]=mpx->font_ec[f]+1;
\r
1187 if ( mpx->info_ptr+mpx->font_ec[f]-mpx->font_bc[f]+1>max_widths )
\r
1188 mpx_abort(mpx,"DVItoMP capacity exceeded (width table size=%d)!",max_widths);
\r
1189 @.DVItoMP capacity exceeded...@>
\r
1190 wp=mpx->info_ptr+mpx->font_ec[f]-mpx->font_bc[f]+1;
\r
1191 mpx_read_tfm_word(mpx); nw=mpx->b0*256+mpx->b1;
\r
1192 if ( (nw==0)||(nw>256) )
\r
1193 font_abort("Bad TFM file for ",f);
\r
1195 for (k=1;k<=3+lh;k++) {
\r
1196 if ( feof(mpx->tfm_file) )
\r
1197 font_abort("Bad TFM file for ",f);
\r
1199 mpx_read_tfm_word(mpx);
\r
1201 if ( mpx->b0<128 )
\r
1202 mpx->tfm_check_sum=((mpx->b0*(int)(256)+mpx->b1)*256+mpx->b2)*256+mpx->b3;
\r
1204 mpx->tfm_check_sum=(((mpx->b0-256)*(int)(256)+mpx->b1)*256+mpx->b2)*256+mpx->b3;
\r
1208 @ @<Store character-width indices...@>=
\r
1210 for (k=mpx->info_ptr;k<=(int)wp-1;k++ ) {
\r
1211 mpx_read_tfm_word(mpx);
\r
1212 if ( mpx->b0>nw )
\r
1213 font_abort("Bad TFM file for ",f);
\r
1215 mpx->width[k]=mpx->b0;
\r
1219 @ No fancy width calculation is needed here because \.{DVItoMP} stores
\r
1220 widths in their raw form as multiples of the design size scaled by $2^{20}$.
\r
1221 The |font_scaled_size| entries have been computed so that the final width
\r
1222 compution can be done in floating point if enough precision is available.
\r
1224 @<Read the width values into the |in_width| table@>=
\r
1225 for (k=0;k<=nw-1;k++) {
\r
1226 mpx_read_tfm_word(mpx);
\r
1227 if ( mpx->b0>127 ) mpx->b0=mpx->b0-256;
\r
1228 mpx->in_width[k]=((mpx->b0*0400+mpx->b1)*0400+mpx->b2)*0400+mpx->b3;
\r
1231 @ The width compution uses a scale factor |dvi_scale| that will be introduced
\r
1232 later. It is equal to one when not typesetting a character from a virtual
\r
1233 font. In that case, the following expressions do the width computation that is
\r
1234 so important in \.{DVItype}. It is less important here because it is impractical
\r
1235 to guarantee precise character positioning in \MP\ output. Nevertheless, the
\r
1236 width compution will be precise if reals have at least 46-bit mantissas and
\r
1237 |round(x-.5)| is equivalent to $\lfloor x\rfloor$. It may be a good idea to
\r
1238 modify this computation if these conditions are not met.
\r
1239 @^system dependencies@>
\r
1241 @<Width of character |c| in font |f|@>=
\r
1242 floor(mpx->dvi_scale*mpx->font_scaled_size[f]*char_width(f,c))
\r
1244 @ @<Width of character |p| in font |cur_font|@>=
\r
1245 floor(mpx->dvi_scale*mpx->font_scaled_size[cur_font]*char_width(cur_font,p))
\r
1247 @ @<Move the widths from |in_width| to |width|@>=
\r
1248 if ( mpx->in_width[0]!=0 )
\r
1249 font_abort("Bad TFM file for ",f); /* the first width should be zero */
\r
1251 mpx->info_base[f]=mpx->info_ptr-mpx->font_bc[f];
\r
1253 for (k=mpx->info_ptr;k<=(int)wp-1;k++) {
\r
1254 mpx->width[k]=mpx->in_width[mpx->width[k]];
\r
1259 @* Reading virtual fonts.
\r
1261 The |in_VF| procedure absorbs the necessary information from a \.{VF} file that
\r
1262 has just been reset so that we are ready to read the first byte. (A complete
\r
1263 description of \.{VF} file format appears in the documention of \.{VFtoVP}).
\r
1264 Like |in_TFM|, this procedure simply aborts the program if it detects anything
\r
1265 wrong with the \.{VF} file.
\r
1268 @<Declare a function called |first_par|@>@;
\r
1269 static void mpx_in_VF (MPX mpx, integer f) {
\r
1270 /* read \.{VF} data for font |f| or abort */
\r
1271 integer p; /* a byte from the \.{VF} file */
\r
1272 boolean was_vf_reading; /* old value of |vf_reading| */
\r
1273 integer c; /* the current character code */
\r
1274 integer limit; /* space limitations force character codes to be less than this */
\r
1275 integer w; /* a \.{TFM} width being read */
\r
1276 was_vf_reading=mpx->vf_reading; mpx->vf_reading=true;
\r
1277 @<Start reading the preamble from a \.{VF} file@>;@/
\r
1278 @<Initialize the data structures for the virtual font@>;@/
\r
1279 p=mpx_get_byte(mpx);
\r
1280 while ( p>=fnt_def1 ) {
\r
1281 if ( p>fnt_def1+3 )
\r
1282 font_abort("Bad VF file for ",f);
\r
1283 mpx_define_font(mpx, mpx_first_par(mpx, p));
\r
1284 p=mpx_get_byte(mpx);
\r
1286 while ( p<=242 ) {
\r
1287 if ( feof(mpx->vf_file) )
\r
1288 font_abort("Bad VF file for ",f);
\r
1289 @<Read the packet length, character code, and \.{TFM} width@>;
\r
1290 @<Store the character packet in |cmd_buf|@>;
\r
1291 p=mpx_get_byte(mpx);
\r
1294 @<Finish setting up the data structures for the new virtual font@>;
\r
1295 mpx->vf_reading=was_vf_reading;
\r
1300 @ @<Start reading the preamble from a \.{VF} file@>=
\r
1301 p=mpx_get_byte(mpx);
\r
1303 font_abort("Bad VF file for ",f);
\r
1304 p=mpx_get_byte(mpx); /* fetch the identification byte */
\r
1306 font_abort("Bad VF file for ",f);
\r
1307 p=mpx_get_byte(mpx); /* fetch the length of the introductory comment */
\r
1309 (void)mpx_get_byte(mpx);
\r
1310 mpx->tfm_check_sum=mpx_signed_quad(mpx);
\r
1311 (void)mpx_signed_quad(mpx); /* skip over the design size */
\r
1313 @ @<Initialize the data structures for the virtual font@>=
\r
1314 mpx->ftop[f]=mpx->vf_ptr;
\r
1315 if ( mpx->vf_ptr==mpx->nfonts )
\r
1316 mpx_abort(mpx,"DVItoMP capacity exceeded (max font numbers=%d)", max_fnums);
\r
1317 @.DVItoMP capacity exceeded...@>
\r
1318 decr(mpx->vf_ptr);
\r
1319 mpx->info_base[f]=mpx->info_ptr;
\r
1320 limit=max_widths-mpx->info_base[f];@/
\r
1321 mpx->font_bc[f]=limit; mpx->font_ec[f]=0
\r
1323 @ @<Read the packet length, character code, and \.{TFM} width@>=
\r
1325 p=mpx_signed_quad(mpx); c=mpx_signed_quad(mpx); w=mpx_signed_quad(mpx);
\r
1327 font_abort("Bad VF file for ",f);
\r
1329 c=mpx_get_byte(mpx); w=mpx_get_three_bytes(mpx);
\r
1332 mpx_abort(mpx,"DVItoMP capacity exceeded (max widths=%d)", max_widths);
\r
1333 @.DVItoMP capacity exceeded...@>
\r
1334 if ( c<mpx->font_bc[f] ) mpx->font_bc[f]=c;
\r
1335 if ( c>mpx->font_ec[f] ) mpx->font_ec[f]=c;
\r
1338 @ @<Store the character packet in |cmd_buf|@>=
\r
1339 if ( mpx->n_cmds+p>=virtual_space )
\r
1340 mpx_abort(mpx,"DVItoMP capacity exceeded (virtual font space=%d)",virtual_space);
\r
1341 @.DVItoMP capacity exceeded...@>
\r
1342 start_cmd(f,c)=mpx->n_cmds;
\r
1344 mpx->cmd_buf[mpx->n_cmds]=mpx_get_byte(mpx);
\r
1345 incr(mpx->n_cmds); decr(p);
\r
1347 mpx->cmd_buf[mpx->n_cmds]=eop; /* add the end-of-packet marker */
\r
1350 @ There are unused |width| and |cmd_ptr| entries if |font_bc[f]>0| but it isn't
\r
1351 worthwhile to slide everything down just to save a little space.
\r
1353 @<Finish setting up the data structures for the new virtual font@>=
\r
1354 mpx->fbase[f]=mpx->vf_ptr+1;
\r
1355 mpx->info_ptr=mpx->info_base[f]+mpx->font_ec[f]+1
\r
1360 The character width information for a font is loaded when the font is selected
\r
1361 for the first time. This information might already be loaded if the font has
\r
1362 already been used at a different scale factor. Otherwise, we look for a \.{VF}
\r
1363 file, or failing that, a \.{TFM} file. All this is done by the |select_font|
\r
1364 function that takes an external font number~|e| and returns the corresponding
\r
1365 internal font number with the width information loaded.
\r
1368 static integer mpx_select_font (MPX mpx, integer e) {
\r
1369 int f; /* the internal font number */
\r
1370 int ff; /* internal font number for an existing version */
\r
1371 integer k; /* general purpose loop counter */
\r
1372 @<Set |f| to the internal font number that corresponds to |e|,
\r
1373 or |abort| if there is none@>;
\r
1374 if ( mpx->info_base[f]==max_widths ) {
\r
1375 ff=mpx_match_font(mpx, (unsigned)f,false);
\r
1376 if ( ff<(int)mpx->nfonts ) {
\r
1377 @<Make font |f| refer to the width information from font |ff|@>;
\r
1379 @<Move the \.{VF} file name into the |cur_name| string@>;
\r
1380 if ( mpx_open_vf_file(mpx) ) {
\r
1381 mpx_in_VF(mpx, f);
\r
1383 if ( ! mpx_open_tfm_file(mpx) )
\r
1384 font_abort("No TFM file found for ",f);
\r
1385 @.no TFM file found@>
\r
1386 mpx_in_TFM(mpx, f);
\r
1388 @<Make sure the checksum in the font file matches the one given in the
\r
1389 |font_def| for font |f|@>;
\r
1391 @<Do any other initialization required for the new font |f|@>;
\r
1396 @ @<Set |f| to the internal font number that corresponds to |e|,...@>=
\r
1397 if ( mpx->cur_ftop<=mpx->nfonts )
\r
1398 mpx->cur_ftop=mpx->nfonts;
\r
1399 mpx->font_num[mpx->cur_ftop]=e;
\r
1401 while ((mpx->font_num[k]!=e)|| mpx->local_only[k] ) incr(k);
\r
1402 if ( k==(int)mpx->cur_ftop )
\r
1403 mpx_abort(mpx,"Undefined font selected");
\r
1404 f=mpx->internal_num[k]
\r
1406 @ @<Make font |f| refer to the width information from font |ff|@>=
\r
1408 mpx->font_bc[f]=mpx->font_bc[ff];
\r
1409 mpx->font_ec[f]=mpx->font_ec[ff];
\r
1410 mpx->info_base[f]=mpx->info_base[ff];
\r
1411 mpx->fbase[f]=mpx->fbase[ff];
\r
1412 mpx->ftop[f]=mpx->ftop[ff];
\r
1415 @ The string |cur_name| is supposed to be set to the external name of the
\r
1416 \.{VF} file for the current font.
\r
1417 @^system dependencies@>
\r
1419 @<Move the \.{VF} file name into the |cur_name| string@>=
\r
1420 mpx->cur_name = xstrdup (mpx->font_name[f])
\r
1422 @ @<Make sure the checksum in the font file matches the one given in the...@>=
\r
1424 if ( (mpx->font_check_sum[f]!=0)&&(mpx->tfm_check_sum!=0)&&@|
\r
1425 (mpx->font_check_sum[f]!=mpx->tfm_check_sum) ) {
\r
1426 font_warn("Checksum mismatch for ",f);
\r
1427 @.Checksum mismatch@>
\r
1431 @* Low level output routines.
\r
1433 One of the basic output operations is to write a \MP\ string expression for
\r
1434 a sequence of characters to be typeset. The main difficulties are that such
\r
1435 strings can contain arbitrary eight-bit bytes and there is no fixed limit on
\r
1436 the length of the string that needs to be produced. In extreme cases this
\r
1437 can lead to expressions such as
\r
1439 \hbox{\.{char7\&char15\&char31\&"?FWayzz"}}
\r
1440 \hbox{\.{\&"zzaF"\&char15\&char3\&char31}}
\r
1441 \hbox{\.{\&"Nxzzzzzzzwvtsqo"}}}
\r
1444 @ A global variable |state| keeps track of the output process.
\r
1445 When |state=normal| we have begun a quoted string and the next character
\r
1446 should be a printable character or a closing quote. When |state=special|
\r
1447 the last thing printed was a ``\.{char}'' construction or a closing quote
\r
1448 and an ampersand should come next. The starting condition |state=initial|
\r
1449 is a lot like |state=special|, except no ampersand is required.
\r
1451 @d special 0 /* the |state| after printing a ``\.{char}'' expression */
\r
1452 @d normal 1 /* the |state| value in a quoted string */
\r
1453 @d initial 2 /* initial |state| */
\r
1456 int state; /* controls the process of printing a string */
\r
1457 int print_col; /* there are at most this many characters on the current line */
\r
1459 @ @<Set initial values@>=
\r
1460 mpx->state = initial;
\r
1461 mpx->print_col = 0; /* there are at most this many characters on the current line */
\r
1463 @ To print a string on the \.{MPX} file, initialize |print_col|, ensure that
\r
1464 |state=initial|, and pass the characters one-at-a-time to |print_char|.
\r
1466 @<Declare subroutines for printing strings@>=
\r
1467 static void mpx_print_char (MPX mpx, unsigned char c) {
\r
1468 integer l; /* number of characters to print |c| or the \.{char} expression */
\r
1469 if ( printable(c) ) l=1;
\r
1470 else if ( c<10 ) l=5;
\r
1471 else if ( c<100 ) l=6;
\r
1473 if ( mpx->print_col+l>line_length-2 ) {
\r
1474 if ( mpx->state==normal ) {
\r
1475 fprintf(mpx->mpxfile,"\""); mpx->state=special;
\r
1477 fprintf(mpx->mpxfile,"\n");
\r
1480 @<Print |c| and update |state| and |print_col|@>;
\r
1483 @ @<Print |c| and update |state| and |print_col|@>=
\r
1484 if ( mpx->state==normal ) {
\r
1485 if ( printable(c) ) {
\r
1486 fprintf(mpx->mpxfile,"%c",xchr(c));
\r
1488 fprintf(mpx->mpxfile,"\"&char%d",c);
\r
1489 mpx->print_col +=2;
\r
1492 if ( mpx->state==special ) {
\r
1493 fprintf(mpx->mpxfile,"&");
\r
1494 incr(mpx->print_col);
\r
1496 if ( printable(c) ) {
\r
1497 fprintf(mpx->mpxfile,"\"%c",xchr(c));
\r
1498 incr(mpx->print_col);
\r
1500 fprintf(mpx->mpxfile,"char%d",c);
\r
1503 mpx->print_col += l;
\r
1504 if ( printable(c) )
\r
1505 mpx->state=normal;
\r
1507 mpx->state=special
\r
1509 @ The |end_char_string| procedure gets the string ended properly and ensures
\r
1510 that there is room for |l| more characters on the output line.
\r
1512 @<Declare subroutines for printing strings@>=
\r
1513 static void mpx_end_char_string (MPX mpx,integer l) {
\r
1514 while ( mpx->state>special ){
\r
1515 fprintf(mpx->mpxfile,"\"");
\r
1516 incr(mpx->print_col);
\r
1519 if ( mpx->print_col+l>line_length ) {
\r
1520 fprintf(mpx->mpxfile,"\n "); mpx->print_col=0;
\r
1522 mpx->state=initial; /* get ready to print the next string */
\r
1525 @ Since |end_char_string| resets |state:=initial|, all we have to do is set
\r
1526 |state:=initial| once at the beginning.
\r
1529 mpx->state=initial;
\r
1531 @ Characters and rules are positioned according to global variables |h| and~|v|
\r
1532 as will be explained later. We also need scale factors that convert quantities
\r
1533 to the right units when they are printed in the \.{MPX} file.
\r
1535 Even though all variable names in the \MP\ output are made local via \.{save}
\r
1536 commands, it is still desirable to preceed them with underscores. This makes
\r
1537 the output more likely to work when used in a macro definition, since the
\r
1538 generated variables names must not collide with formal parameters in such
\r
1543 integer v; /* the current position in \.{DVI} units */
\r
1544 double conv; /* converts \.{DVI} units to \MP\ points */
\r
1545 double mag; /* magnification factor times 1000 */
\r
1547 @ @c @<Declare a procedure called |finish_last_char|@>@;
\r
1548 static void mpx_do_set_char (MPX mpx,integer f, integer c) {
\r
1549 if ( (c<mpx->font_bc[f])||(c>mpx->font_ec[f]) )
\r
1550 mpx_abort(mpx,"attempt to typeset invalid character %d",c);
\r
1551 @.attempt to typeset...@>
\r
1552 if ((mpx->h!=mpx->str_h2)||(mpx->v!=mpx->str_v)||
\r
1553 (f!=mpx->str_f)||(mpx->dvi_scale!=mpx->str_scale) ) {
\r
1554 if ( mpx->str_f>=0 ) {
\r
1555 mpx_finish_last_char(mpx);
\r
1556 } else if ( ! mpx->fonts_used ) {
\r
1557 @<Prepare to output the first character on a page@>;
\r
1559 if ( ! mpx->font_used[f] )
\r
1560 @<Prepare to use font |f| for the first time on a page@>;
\r
1561 fprintf(mpx->mpxfile,"_s("); mpx->print_col=3;@/
\r
1562 mpx->str_scale=mpx->dvi_scale; mpx->str_f=f;
\r
1563 mpx->str_v=mpx->v; mpx->str_h1=mpx->h;
\r
1565 mpx_print_char(mpx, c);
\r
1566 mpx->str_h2=mpx->h+@<Width of character |c| in font |f|@>;
\r
1570 boolean font_used[(max_fonts+1)]; /* has this font been used on this page? */
\r
1571 boolean fonts_used; /* has any font been used on this page? */
\r
1572 boolean rules_used; /* has any rules been set on this page? */
\r
1574 integer str_v; /* starting position for current output string */
\r
1575 integer str_h2; /* where the current output string ends */
\r
1576 integer str_f; /* internal font number for the current output string */
\r
1577 double str_scale; /* value of |dvi_scale| for the current output string */
\r
1580 @ Before using any fonts we need to define a MetaPost macro for
\r
1581 typesetting character strings. The |font_used| array is not
\r
1582 initialized until it is actually time to output a character.
\r
1585 static void mpx_prepare_font_use(MPX mpx);
\r
1588 static void mpx_prepare_font_use(MPX mpx) {
\r
1590 for (k=0; k<mpx->nfonts;k++ )
\r
1591 mpx->font_used[k]=false;
\r
1592 mpx->fonts_used=true;
\r
1593 fprintf(mpx->mpxfile,"string _n[];\n");
\r
1594 fprintf(mpx->mpxfile,"vardef _s(expr _t,_f,_m,_x,_y)(text _c)=\n");
\r
1595 fprintf(mpx->mpxfile,
\r
1596 " addto _p also _t infont _f scaled _m shifted (_x,_y) _c; enddef;\n");
\r
1599 @ @<Prepare to output the first character on a page@>=
\r
1600 mpx_prepare_font_use(mpx)
\r
1603 @ @<Do any other initialization required for the new font |f|@>=
\r
1604 mpx->font_used[f]=false;
\r
1606 @ Do what is necessary when the font with internal number f is used for the
\r
1607 first time on a page.
\r
1610 static void mpx_first_use(MPX mpx, int f) ;
\r
1613 static void mpx_first_use(MPX mpx, int f) {
\r
1614 mpx->font_used[f]=true;
\r
1615 fprintf(mpx->mpxfile,"_n%d=",f);
\r
1617 mpx_print_font(mpx, f);
\r
1618 mpx_end_char_string(mpx, 1);
\r
1619 fprintf(mpx->mpxfile,";\n");
\r
1622 @ @<Prepare to use font |f| for the first time on a page@>=
\r
1623 mpx_first_use(mpx,f);
\r
1625 @ We maintain the invariant that |str_f=-1| when there is no output string
\r
1626 under construction.
\r
1628 @<Declare a procedure called |finish_last_char|@>=
\r
1629 static void mpx_finish_last_char (MPX mpx) {
\r
1631 /* font scale factor and \MP\ coordinates of reference point */
\r
1632 if ( mpx->str_f>=0 ) {
\r
1633 if (mpx->mode==mpx_tex_mode) {
\r
1634 m=mpx->str_scale*mpx->font_scaled_size[mpx->str_f]*
\r
1635 mpx->mag/mpx->font_design_size[mpx->str_f];
\r
1636 x=mpx->conv*mpx->str_h1;
\r
1637 y=mpx->conv*(-mpx->str_v);
\r
1638 if ( (fabs(x)>=4096.0)||(fabs(y)>=4096.0)||(m>=4096.0)||(m<0) ) {
\r
1639 mpx_warn(mpx,"text is out of range");
\r
1640 mpx_end_char_string(mpx, 60);
\r
1642 mpx_end_char_string(mpx, 40);
\r
1644 fprintf(mpx->mpxfile,",_n%d,%1.5f,%1.4f,%1.4f,",mpx->str_f,m,x,y);
\r
1645 @<Print a \.{withcolor} specifier if appropriate@>@/
\r
1646 fprintf(mpx->mpxfile,");\n");
\r
1648 m = mpx->str_size / mpx->font_design_size[mpx->str_f];
\r
1649 x = mpx->dmp_str_h1 * mpx->unit;
\r
1650 y = YCORR - mpx->dmp_str_v * mpx->unit;
\r
1651 if (fabs(x) >= 4096.0 || fabs(y) >= 4096.0 || m >= 4096.0 || m < 0) {
\r
1652 mpx_warn(mpx,"text out of range ignored");
\r
1653 mpx_end_char_string(mpx,67);
\r
1655 mpx_end_char_string(mpx,47);
\r
1657 fprintf(mpx->mpxfile, ")infont n%d", mpx->font_num[mpx->str_f]);
\r
1658 mpx_slant_and_ht(mpx);
\r
1659 fprintf(mpx->mpxfile, ",%.5f,%.4f,%.4f);\n", (m*1.00375), x, y);
\r
1665 @ Setting rules is fairly simple.
\r
1668 static void mpx_do_set_rule (MPX mpx,integer ht, integer wd) {
\r
1669 double xx1,yy1,xx2,yy2,ww;
\r
1670 /* \MP\ coordinates of lower-left and upper-right corners */
\r
1672 @<Handle a special rule that determines the box size@>
\r
1673 } else if ( (ht>0)||(wd>0) ) {
\r
1674 if ( mpx->str_f>=0 )
\r
1675 mpx_finish_last_char(mpx);
\r
1676 if ( ! mpx->rules_used ) {
\r
1677 mpx->rules_used=true;
\r
1678 fprintf(mpx->mpxfile,
\r
1679 "interim linecap:=0;\n"
\r
1680 "vardef _r(expr _a,_w)(text _t) =\n"
\r
1681 " addto _p doublepath _a withpen pencircle scaled _w _t enddef;");
\r
1683 @<Make |(xx1,yy1)| and |(xx2,yy2)| then ends of the desired penstroke
\r
1684 and |ww| the desired stroke width@>;
\r
1685 if ( (fabs(xx1)>=4096.0)||(fabs(yy1)>=4096.0)||@|
\r
1686 (fabs(xx2)>=4096.0)||(fabs(yy2)>=4096.0)||(ww>=4096.0) )
\r
1687 mpx_warn(mpx,"hrule or vrule is out of range");
\r
1688 fprintf(mpx->mpxfile,"_r((%1.4f,%1.4f)..(%1.4f,%1.4f), %1.4f,",xx1,yy1,xx2,yy2,ww);
\r
1689 @<Print a \.{withcolor} specifier if appropriate@>@/
\r
1690 fprintf(mpx->mpxfile,");\n");
\r
1694 @ @<Make |(xx1,yy1)| and |(xx2,yy2)| then ends of the desired penstroke...@>=
\r
1695 xx1=mpx->conv*mpx->h;
\r
1696 yy1=mpx->conv*(-mpx->v);
\r
1698 xx2=xx1+mpx->conv*wd;
\r
1703 yy2=yy1+mpx->conv*ht;
\r
1709 @ Rules of width one dvi unit are not typeset since \.{MPtoTeX} adds an
\r
1710 extraneous rule of this width in order to allow \.{DVItoMP} to deduce the
\r
1711 dimensions of the boxes it ships out. The box width is the left edge of the
\r
1712 last such rule; the height and depth are at the top and bottom of the rule.
\r
1713 There should be only one special rule per picture but there could be more if
\r
1714 the user tries to typeset his own one-dvi-unit rules. In this case the
\r
1715 dimension-determining rule is the last one in the picture.
\r
1717 @<Handle a special rule that determines the box size@>=
\r
1719 mpx->pic_wd=mpx->h; mpx->pic_dp=mpx->v; mpx->pic_ht=ht-mpx->v;
\r
1723 integer pic_dp; integer pic_ht; integer pic_wd; /* picture dimensions from special rule */
\r
1725 @ The following initialization and clean-up is required. We do a little more
\r
1726 initialization than is absolutely necessary since some compilers might complain
\r
1727 if the variables are uninitialized when |do_set_char| tests them.
\r
1730 static void mpx_start_picture (MPX mpx) {
\r
1731 mpx->fonts_used=false;
\r
1732 mpx->rules_used=false;
\r
1733 mpx->graphics_used=false;
\r
1737 mpx->str_scale=1.0; /* values don't matter */
\r
1738 mpx->dmp_str_v = 0.0;
\r
1739 mpx->dmp_str_h2 = 0.0;
\r
1740 mpx->str_size = 0.0;
\r
1741 fprintf(mpx->mpxfile,
\r
1742 "begingroup save %s_p,_r,_s,_n; picture _p; _p=nullpicture;\n",
\r
1743 (mpx->mode == mpx_tex_mode ? "" : "_C,_D,"));
\r
1746 static void mpx_stop_picture (MPX mpx) {
\r
1747 double w,h,dd; /* width, height, negative depth in PostScript points */
\r
1748 if ( mpx->str_f>=0 )
\r
1749 mpx_finish_last_char(mpx);
\r
1750 if (mpx->mode==mpx_tex_mode) {
\r
1751 @<Print a \&{setbounds} command based on picture dimensions@>;
\r
1753 fprintf(mpx->mpxfile,"_p endgroup\n");
\r
1756 @ @<Print a \&{setbounds} command based on picture dimensions@>=
\r
1757 dd=-mpx->pic_dp*mpx->conv;
\r
1758 w=mpx->conv*mpx->pic_wd;
\r
1759 h=mpx->conv*mpx->pic_ht;
\r
1760 fprintf(mpx->mpxfile,
\r
1761 "setbounds _p to (0,%1.4f)--(%1.4f,%1.4f)--\n"
\r
1762 " (%1.4f,%1.4f)--(0,%1.4f)--cycle;\n",dd,w,dd,w,h,h)
\r
1764 @* Translation to symbolic form.
\r
1766 The main work of \.{DVItoMP} is accomplished by the |do_dvi_commands|
\r
1767 procedure, which produces the output for an entire page, assuming that the
\r
1768 |bop| command for that page has already been processed. This procedure is
\r
1769 essentially an interpretive routine that reads and acts on the \.{DVI}
\r
1770 commands. It is also capable of executing the typesetting commands for
\r
1771 a character in a virtual font.
\r
1773 @ The definition of \.{DVI} files refers to six registers,
\r
1774 $(h,v,w,x,y,z)$, which hold integer values in \.{DVI} units.
\r
1775 These units come directly from the input file except they need to be
\r
1776 rescaled when typesetting characters from a virtual font.
\r
1777 The stack of $(h,v,w,x,y,z)$ values is represented by six arrays
\r
1778 called |hstack|, \dots, |zstack|.
\r
1781 integer w;integer x;integer y;integer z;
\r
1782 /* current state values (|h| and |v| have already been declared) */
\r
1783 integer hstack[(stack_size+1)];
\r
1784 integer vstack[(stack_size+1)];
\r
1785 integer wstack[(stack_size+1)];
\r
1786 integer xstack[(stack_size+1)];
\r
1787 integer ystack[(stack_size+1)];
\r
1788 integer zstack[(stack_size+1)]; /* pushed down values in \.{DVI} units */
\r
1789 integer stk_siz; /* the current stack size */
\r
1790 double dvi_scale; /* converts units of current input source to \.{DVI} units */
\r
1792 @ @<Do initialization required before starting a new page@>=
\r
1793 mpx->dvi_scale=1.0;
\r
1795 mpx->h=0; mpx->v=0;
\r
1796 mpx->Xslant = 0.0; mpx->Xheight = 0.0
\r
1798 @ Next, we need procedures to handle |push| and |pop| commands.
\r
1800 @c @<Declare procedures to handle color commands@>
\r
1801 static void mpx_do_push (MPX mpx) {
\r
1802 if ( mpx->stk_siz==stack_size )
\r
1803 mpx_abort(mpx,"DVItoMP capacity exceeded (stack size=%d)",stack_size);
\r
1804 @.DVItoMP capacity exceeded...@>
\r
1805 mpx->hstack[mpx->stk_siz]=mpx->h;
\r
1806 mpx->vstack[mpx->stk_siz]=mpx->v; mpx->wstack[mpx->stk_siz]=mpx->w;
\r
1807 mpx->xstack[mpx->stk_siz]=mpx->x;
\r
1808 mpx->ystack[mpx->stk_siz]=mpx->y; mpx->zstack[mpx->stk_siz]=mpx->z;
\r
1809 incr(mpx->stk_siz);
\r
1812 static void mpx_do_pop (MPX mpx) {
\r
1813 if ( mpx->stk_siz==0 )
\r
1814 bad_dvi("attempt to pop empty stack");
\r
1816 decr(mpx->stk_siz);
\r
1817 mpx->h=mpx->hstack[mpx->stk_siz];
\r
1818 mpx->v=mpx->vstack[mpx->stk_siz]; mpx->w=mpx->wstack[mpx->stk_siz];
\r
1819 mpx->x=mpx->xstack[mpx->stk_siz];
\r
1820 mpx->y=mpx->ystack[mpx->stk_siz]; mpx->z=mpx->zstack[mpx->stk_siz];
\r
1824 @ The |set_virtual_char| procedure is mutually recursive with
\r
1825 |do_dvi_commands|. This is really a supervisory
\r
1827 procedure that calls |do_set_char| or adjusts the input source to read
\r
1828 typesetting commands for a character in a virtual font.
\r
1831 static void mpx_do_dvi_commands (MPX mpx);
\r
1832 static void mpx_set_virtual_char (MPX mpx,integer f, integer c) {
\r
1833 double old_scale; /* original value of |dvi_scale| */
\r
1834 unsigned old_buf_ptr; /* original value of the input pointer |buf_ptr| */
\r
1835 unsigned old_fbase,old_ftop; /* originally applicable part of the |font_num| table */
\r
1836 if ( mpx->fbase[f]==0 )
\r
1837 mpx_do_set_char(mpx, f,c);
\r
1839 old_fbase=mpx->cur_fbase; old_ftop=mpx->cur_ftop;
\r
1840 mpx->cur_fbase=mpx->fbase[f];
\r
1841 mpx->cur_ftop=mpx->ftop[f];
\r
1842 old_scale=mpx->dvi_scale;
\r
1843 mpx->dvi_scale=mpx->dvi_scale*mpx->font_scaled_size[f];
\r
1844 old_buf_ptr=mpx->buf_ptr;
\r
1845 mpx->buf_ptr=start_cmd(f,c);
\r
1847 mpx_do_dvi_commands(mpx);
\r
1848 mpx_do_pop(mpx);@/
\r
1849 mpx->buf_ptr=old_buf_ptr;
\r
1850 mpx->dvi_scale=old_scale;
\r
1851 mpx->cur_fbase=old_fbase;
\r
1852 mpx->cur_ftop=old_ftop;
\r
1856 @ Before we get into the details of |do_dvi_commands|, it is convenient to
\r
1857 consider a simpler routine that computes the first parameter of each
\r
1860 @d four_cases(A) (A): case (A)+1: case (A)+2: case (A)+3
\r
1861 @d eight_cases(A) four_cases((A)): case four_cases((A)+4)
\r
1862 @d sixteen_cases(A) eight_cases((A)): case eight_cases((A)+8)
\r
1863 @d thirty_two_cases(A) sixteen_cases((A)): case sixteen_cases((A)+16)
\r
1864 @d sixty_four_cases(A) thirty_two_cases((A)): case thirty_two_cases((A)+32)
\r
1866 @<Declare a function called |first_par|@>=
\r
1867 static integer mpx_first_par (MPX mpx, unsigned int o) {
\r
1869 case sixty_four_cases(set_char_0):
\r
1870 case sixty_four_cases(set_char_0+64):
\r
1871 return (o-set_char_0);
\r
1873 case set1: case put1: case fnt1: case xxx1: case fnt_def1:
\r
1874 return mpx_get_byte(mpx);
\r
1876 case set1+1: case put1+1: case fnt1+1: case xxx1+1: case fnt_def1+1:
\r
1877 return mpx_get_two_bytes(mpx);
\r
1879 case set1+2: case put1+2: case fnt1+2: case xxx1+2: case fnt_def1+2:
\r
1880 return mpx_get_three_bytes(mpx);
\r
1882 case right1: case w1: case x1: case down1: case y1: case z1:
\r
1883 return mpx_signed_byte(mpx);
\r
1885 case right1+1: case w1+1: case x1+1: case down1+1: case y1+1: case z1+1:
\r
1886 return mpx_signed_pair(mpx);
\r
1888 case right1+2: case w1+2: case x1+2: case down1+2: case y1+2: case z1+2:
\r
1889 return mpx_signed_trio(mpx);
\r
1891 case set1+3: case set_rule: case put1+3: case put_rule:
\r
1892 case right1+3: case w1+3: case x1+3: case down1+3: case y1+3: case z1+3:
\r
1893 case fnt1+3: case xxx1+3: case fnt_def1+3:
\r
1894 return mpx_signed_quad(mpx);
\r
1896 case nop: case bop: case eop: case push: case pop: case pre: case post:
\r
1897 case post_post: case undefined_commands:
\r
1900 case w0: return mpx->w; break;
\r
1901 case x0: return mpx->x; break;
\r
1902 case y0: return mpx->y; break;
\r
1903 case z0: return mpx->z; break;
\r
1904 case sixty_four_cases(fnt_num_0):
\r
1905 return (o-fnt_num_0);
\r
1908 return 0; /* compiler warning */
\r
1911 @ Here is the |do_dvi_commands| procedure.
\r
1914 static void mpx_do_dvi_commands (MPX mpx) {
\r
1915 unsigned int o; /* operation code of the current command */
\r
1916 integer p,q; /* parameters of the current command */
\r
1917 integer cur_font; /* current internal font number */
\r
1918 if ( (mpx->cur_fbase<mpx->cur_ftop) && (mpx->buf_ptr<virtual_space) )
\r
1919 cur_font=mpx_select_font(mpx, mpx->font_num[mpx->cur_ftop-1]); /* select first local font */
\r
1921 cur_font=max_fnums+1; /* current font is undefined */
\r
1922 mpx->w=0; mpx->x=0; mpx->y=0; mpx->z=0; /* initialize the state variables */
\r
1924 @<Translate the next command in the \.{DVI} file; |return| if it was |eop|@>;
\r
1928 @ The multiway switch in |first_par|, above, was organized by the length
\r
1929 of each command; the one in |do_dvi_commands| is organized by the semantics.
\r
1931 @ @<Translate the next command...@>=
\r
1933 o=mpx_get_byte(mpx);
\r
1934 p=mpx_first_par(mpx, o);
\r
1935 if ( feof(mpx->dvi_file) )
\r
1936 bad_dvi("the DVI file ended prematurely");
\r
1937 @.the DVI file ended prematurely@>
\r
1938 if ( o<set1+4 ) { /* |set_char_0| through |set_char_127|, |set1| through |set4| */
\r
1939 if ( cur_font>max_fnums ) {
\r
1940 if ( mpx->vf_reading )
\r
1941 mpx_abort(mpx,"no font selected for character %d in virtual font", p);
\r
1943 bad_dvi_two("no font selected for character %d",p);
\r
1945 @.no font selected@>
\r
1946 mpx_set_virtual_char(mpx, cur_font,p);
\r
1947 mpx->h += @<Width of character |p| in font |cur_font|@>;
\r
1950 case four_cases(put1):
\r
1951 mpx_set_virtual_char(mpx, cur_font, p);
\r
1954 q=trunc(mpx_signed_quad(mpx)*mpx->dvi_scale);
\r
1955 mpx_do_set_rule(mpx, trunc(p*mpx->dvi_scale),q);
\r
1959 q=trunc(mpx_signed_quad(mpx)*mpx->dvi_scale);
\r
1960 mpx_do_set_rule(mpx, trunc(p*mpx->dvi_scale),q);
\r
1962 @<Additional cases for translating \.{DVI} command |o| with
\r
1963 first parameter |p|@>@;
\r
1964 case undefined_commands:
\r
1965 bad_dvi_two("undefined command %d",o);
\r
1966 @.undefined command@>
\r
1968 } /* all cases have been enumerated */
\r
1972 @ @<Additional cases for translating \.{DVI} command |o|...@>=
\r
1973 case four_cases(xxx1):
\r
1974 mpx_do_xxx(mpx, p);
\r
1976 case pre: case post: case post_post:
\r
1977 bad_dvi("preamble or postamble within a page!");
\r
1978 @.preamble or postamble within a page@>
\r
1981 @ @<Additional cases for translating \.{DVI} command |o|...@>=
\r
1985 bad_dvi("bop occurred before eop");
\r
1986 @.bop occurred before eop@>
\r
1998 @ @<Additional cases for translating \.{DVI} command |o|...@>=
\r
1999 case four_cases(right1):
\r
2000 mpx->h += trunc(p*mpx->dvi_scale);
\r
2002 case w0: case four_cases(w1):
\r
2003 mpx->w = trunc(p*mpx->dvi_scale); mpx->h += mpx->w;
\r
2005 case x0: case four_cases(x1):
\r
2006 mpx->x = trunc(p*mpx->dvi_scale); mpx->h += mpx->x;
\r
2008 case four_cases(down1):
\r
2009 mpx->v += trunc(p*mpx->dvi_scale);
\r
2011 case y0: case four_cases(y1):
\r
2012 mpx->y = trunc(p*mpx->dvi_scale); mpx->v += mpx->y;
\r
2014 case z0: case four_cases(z1):
\r
2015 mpx->z = trunc(p*mpx->dvi_scale); mpx->v += mpx->z;
\r
2018 @ @<Additional cases for translating \.{DVI} command |o|...@>=
\r
2019 case sixty_four_cases(fnt_num_0): case four_cases(fnt1):
\r
2020 cur_font = mpx_select_font(mpx, p);
\r
2022 case four_cases(fnt_def1):
\r
2023 mpx_define_font(mpx, p);
\r
2026 @* The main program.
\r
2027 Now we are ready to put it all together. This is where \.{DVItoMP} starts,
\r
2028 and where it ends.
\r
2031 static int mpx_dvitomp (MPX mpx, char *dviname) {
\r
2033 mpx->dviname = dviname;
\r
2034 mpx_open_dvi_file(mpx);
\r
2035 @<Process the preamble@>;
\r
2036 mpx_open_mpxfile(mpx);
\r
2037 if (mpx->banner!=NULL)
\r
2038 fprintf (mpx->mpxfile,"%s\n",mpx->banner);
\r
2040 @<Advance to the next |bop| command@>;
\r
2041 for (k=0;k<=10;k++)
\r
2042 (void)mpx_signed_quad(mpx);
\r
2043 @<Do initialization required before starting a new page@>;
\r
2044 mpx_start_picture(mpx);
\r
2045 mpx_do_dvi_commands(mpx);
\r
2046 if ( mpx->stk_siz!=0 )
\r
2047 bad_dvi("stack not empty at end of page");
\r
2048 @.stack not empty...@>
\r
2049 mpx_stop_picture(mpx);
\r
2050 fprintf(mpx->mpxfile,"mpxbreak\n");
\r
2052 if ( mpx->history<=mpx_cksum_trouble )
\r
2055 return mpx->history;
\r
2058 @ The main program needs a few global variables in order to do its work.
\r
2061 integer k;integer p; /* general purpose registers */
\r
2062 integer numerator;integer denominator; /* stated conversion ratio */
\r
2064 @ @<Process the preamble@>=
\r
2067 p=mpx_get_byte(mpx); /* fetch the first byte */
\r
2069 bad_dvi("First byte isn""t start of preamble!");
\r
2070 @.First byte isn't...@>
\r
2071 p=mpx_get_byte(mpx); /* fetch the identification byte */
\r
2073 mpx_warn(mpx,"identification in byte 1 should be %d!", id_byte);
\r
2074 @.identification...should be n@>
\r
2075 @<Compute the conversion factor@>;
\r
2076 p=mpx_get_byte(mpx); /* fetch the length of the introductory comment */
\r
2079 (void)mpx_get_byte(mpx);
\r
2083 @ The conversion factor |conv| is figured as follows: There are exactly
\r
2084 |n/d| decimicrons per \.{DVI} unit, and 254000 decimicrons per inch,
\r
2085 and |resolution| pixels per inch. Then we have to adjust this
\r
2086 by the stated amount of magnification. No such adjustment is needed for
\r
2087 |dvi_per_fix| since it is used to convert design sizes.
\r
2089 @<Compute the conversion factor@>=
\r
2090 mpx->numerator=mpx_signed_quad(mpx); mpx->denominator=mpx_signed_quad(mpx);
\r
2091 if ( (mpx->numerator<=0)||(mpx->denominator<=0) )
\r
2092 bad_dvi("bad scale ratio in preamble");
\r
2093 @.bad scale ratio@>
\r
2094 mpx->mag=mpx_signed_quad(mpx)/1000.0;
\r
2095 if ( mpx->mag<=0.0 )
\r
2096 bad_dvi("magnification isn't positive");
\r
2097 @.magnification isn't positive@>
\r
2098 mpx->conv=(mpx->numerator/254000.0)*(72.0/mpx->denominator)*mpx->mag;
\r
2099 mpx->dvi_per_fix=(254000.0/mpx->numerator)*(mpx->denominator/72.27)/1048576.0;
\r
2101 @ @<Advance to the next |bop| command@>=
\r
2104 k=mpx_get_byte(mpx);
\r
2105 if ( (k>=fnt_def1)&&(k<fnt_def1+4) ){
\r
2106 p=mpx_first_par(mpx, (unsigned int)k);
\r
2107 mpx_define_font(mpx, p); k=nop;
\r
2113 bad_dvi("missing bop");
\r
2117 @ Global filenames.
\r
2123 These changes support \.{dvips}-style ``\.{color push NAME}'' and
\r
2124 ``\.{color pop}'' specials. We store a list of named colors, sorted by
\r
2125 name, and decorate the relevant drawing commands with ``\.{withcolor
\r
2126 (r,g,b)}'' specifiers while a color is defined.
\r
2128 @ A constant bounding the size of the named-color array.
\r
2130 @d max_named_colors 100 /* maximum number of distinct named colors */
\r
2132 @ Then we declare a record for color types.
\r
2135 typedef struct named_color_record {
\r
2136 char *name; /* color name */
\r
2137 char *value; /* text to pass to MetaPost */
\r
2138 } named_color_record;
\r
2140 @ Declare the named-color array itself.
\r
2143 named_color_record named_colors[(max_named_colors+1)];
\r
2144 /* stores information about named colors, in sorted order by name */
\r
2145 integer num_named_colors; /* number of elements of |named_colors| that are valid */
\r
2147 @ This function, used only during initialization, defines a named color.
\r
2150 static void mpx_def_named_color (MPX mpx, char *n, char *v) {
\r
2151 mpx->num_named_colors++;
\r
2152 assert(mpx->num_named_colors<max_named_colors);
\r
2153 mpx->named_colors[mpx->num_named_colors].name = n;
\r
2154 mpx->named_colors[mpx->num_named_colors].value = v;
\r
2157 @ @<Declarations@>=
\r
2158 static void mpx_def_named_color (MPX mpx, char *n, char *v);
\r
2160 @ During the initialization phase, we define values for all the named
\r
2161 colors defined in \.{colordvi.tex}. CMYK-to-RGB conversion by GhostScript.
\r
2163 This list has to be sorted alphabetically!
\r
2165 @<Set initial values@>=
\r
2166 mpx->num_named_colors = 0;
\r
2167 mpx_def_named_color(mpx, "Apricot", "(1.0, 0.680006, 0.480006)");
\r
2168 mpx_def_named_color(mpx, "Aquamarine", "(0.180006, 1.0, 0.7)");
\r
2169 mpx_def_named_color(mpx, "Bittersweet", "(0.760012, 0.0100122, 0.0)");
\r
2170 mpx_def_named_color(mpx, "Black", "(0.0, 0.0, 0.0)");
\r
2171 mpx_def_named_color(mpx, "Blue", "(0.0, 0.0, 1.0)");
\r
2172 mpx_def_named_color(mpx, "BlueGreen", "(0.15, 1.0, 0.669994)");
\r
2173 mpx_def_named_color(mpx, "BlueViolet", "(0.1, 0.05, 0.960012)");
\r
2174 mpx_def_named_color(mpx, "BrickRed", "(0.719994, 0.0, 0.0)");
\r
2175 mpx_def_named_color(mpx, "Brown", "(0.4, 0.0, 0.0)");
\r
2176 mpx_def_named_color(mpx, "BurntOrange", "(1.0, 0.489988, 0.0)");
\r
2177 mpx_def_named_color(mpx, "CadetBlue", "(0.380006, 0.430006, 0.769994)");
\r
2178 mpx_def_named_color(mpx, "CarnationPink", "(1.0, 0.369994, 1.0)");
\r
2179 mpx_def_named_color(mpx, "Cerulean", "(0.0600122, 0.889988, 1.0)");
\r
2180 mpx_def_named_color(mpx, "CornflowerBlue", "(0.35, 0.869994, 1.0)");
\r
2181 mpx_def_named_color(mpx, "Cyan", "(0.0, 1.0, 1.0)");
\r
2182 mpx_def_named_color(mpx, "Dandelion", "(1.0, 0.710012, 0.160012)");
\r
2183 mpx_def_named_color(mpx, "DarkOrchid", "(0.6, 0.2, 0.8)");
\r
2184 mpx_def_named_color(mpx, "Emerald", "(0.0, 1.0, 0.5)");
\r
2185 mpx_def_named_color(mpx, "ForestGreen", "(0.0, 0.880006, 0.0)");
\r
2186 mpx_def_named_color(mpx, "Fuchsia", "(0.45, 0.00998169, 0.919994)");
\r
2187 mpx_def_named_color(mpx, "Goldenrod", "(1.0, 0.9, 0.160012)");
\r
2188 mpx_def_named_color(mpx, "Gray", "(0.5, 0.5, 0.5)");
\r
2189 mpx_def_named_color(mpx, "Green", "(0.0, 1.0, 0.0)");
\r
2190 mpx_def_named_color(mpx, "GreenYellow", "(0.85, 1.0, 0.310012)");
\r
2191 mpx_def_named_color(mpx, "JungleGreen", "(0.0100122, 1.0, 0.480006)");
\r
2192 mpx_def_named_color(mpx, "Lavender", "(1.0, 0.519994, 1.0)");
\r
2193 mpx_def_named_color(mpx, "LimeGreen", "(0.5, 1.0, 0.0)");
\r
2194 mpx_def_named_color(mpx, "Magenta", "(1.0, 0.0, 1.0)");
\r
2195 mpx_def_named_color(mpx, "Mahogany", "(0.65, 0.0, 0.0)");
\r
2196 mpx_def_named_color(mpx, "Maroon", "(0.680006, 0.0, 0.0)");
\r
2197 mpx_def_named_color(mpx, "Melon", "(1.0, 0.539988, 0.5)");
\r
2198 mpx_def_named_color(mpx, "MidnightBlue", "(0.0, 0.439988, 0.569994)");
\r
2199 mpx_def_named_color(mpx, "Mulberry", "(0.640018, 0.0800061, 0.980006)");
\r
2200 mpx_def_named_color(mpx, "NavyBlue", "(0.0600122, 0.460012, 1.0)");
\r
2201 mpx_def_named_color(mpx, "OliveGreen", "(0.0, 0.6, 0.0)");
\r
2202 mpx_def_named_color(mpx, "Orange", "(1.0, 0.389988, 0.130006)");
\r
2203 mpx_def_named_color(mpx, "OrangeRed", "(1.0, 0.0, 0.5)");
\r
2204 mpx_def_named_color(mpx, "Orchid", "(0.680006, 0.360012, 1.0)");
\r
2205 mpx_def_named_color(mpx, "Peach", "(1.0, 0.5, 0.3)");
\r
2206 mpx_def_named_color(mpx, "Periwinkle", "(0.430006, 0.45, 1.0)");
\r
2207 mpx_def_named_color(mpx, "PineGreen", "(0.0, 0.75, 0.160012)");
\r
2208 mpx_def_named_color(mpx, "Plum", "(0.5, 0.0, 1.0)");
\r
2209 mpx_def_named_color(mpx, "ProcessBlue", "(0.0399878, 1.0, 1.0)");
\r
2210 mpx_def_named_color(mpx, "Purple", "(0.55, 0.139988, 1.0)");
\r
2211 mpx_def_named_color(mpx, "RawSienna", "(0.55, 0.0, 0.0)");
\r
2212 mpx_def_named_color(mpx, "Red", "(1.0, 0.0, 0.0)");
\r
2213 mpx_def_named_color(mpx, "RedOrange", "(1.0, 0.230006, 0.130006)");
\r
2214 mpx_def_named_color(mpx, "RedViolet", "(0.590018, 0.0, 0.660012)");
\r
2215 mpx_def_named_color(mpx, "Rhodamine", "(1.0, 0.180006, 1.0)");
\r
2216 mpx_def_named_color(mpx, "RoyalBlue", "(0.0, 0.5, 1.0)");
\r
2217 mpx_def_named_color(mpx, "RoyalPurple", "(0.25, 0.1, 1.0)");
\r
2218 mpx_def_named_color(mpx, "RubineRed", "(1.0, 0.0, 0.869994)");
\r
2219 mpx_def_named_color(mpx, "Salmon", "(1.0, 0.469994, 0.619994)");
\r
2220 mpx_def_named_color(mpx, "SeaGreen", "(0.310012, 1.0, 0.5)");
\r
2221 mpx_def_named_color(mpx, "Sepia", "(0.3, 0.0, 0.0)");
\r
2222 mpx_def_named_color(mpx, "SkyBlue", "(0.380006, 1.0, 0.880006)");
\r
2223 mpx_def_named_color(mpx, "SpringGreen", "(0.739988, 1.0, 0.239988)");
\r
2224 mpx_def_named_color(mpx, "Tan", "(0.860012, 0.580006, 0.439988)");
\r
2225 mpx_def_named_color(mpx, "TealBlue", "(0.119994, 0.980006, 0.640018)");
\r
2226 mpx_def_named_color(mpx, "Thistle", "(0.880006, 0.410012, 1.0)");
\r
2227 mpx_def_named_color(mpx, "Turquoise", "(0.15, 1.0, 0.8)");
\r
2228 mpx_def_named_color(mpx, "Violet", "(0.210012, 0.119994, 1.0)");
\r
2229 mpx_def_named_color(mpx, "VioletRed", "(1.0, 0.189988, 1.0)");
\r
2230 mpx_def_named_color(mpx, "White", "(1.0, 1.0, 1.0)");
\r
2231 mpx_def_named_color(mpx, "WildStrawberry", "(1.0, 0.0399878, 0.610012)");
\r
2232 mpx_def_named_color(mpx, "Yellow", "(1.0, 1.0, 0.0)");
\r
2233 mpx_def_named_color(mpx, "YellowGreen", "(0.560012, 1.0, 0.260012)");
\r
2234 mpx_def_named_color(mpx, "YellowOrange", "(1.0, 0.580006, 0.0)");
\r
2236 @ Color commands get a separate warning procedure. |warn| sets |history :=
\r
2237 mpx_warning_given|, which causes a nonzero exit status; but color errors are
\r
2238 trivial and should leave the exit status zero.
\r
2240 @d color_warn(A) mpx_warn(mpx,A)
\r
2241 @d color_warn_two(A,B) mpx_warn(mpx,"%s%s",A,B)
\r
2243 @ The |do_xxx| procedure handles DVI specials (defined with the |xxx1...xxx4| commands).
\r
2247 @<Declare procedures to handle color commands@>=
\r
2248 static void mpx_do_xxx (MPX mpx, integer p)
\r
2250 unsigned char buf[(XXX_BUF+1)]; /* FIXME: Fixed size buffer. */
\r
2251 integer l, r, m, k, len;
\r
2253 int bufsiz = XXX_BUF;
\r
2255 while ( ( p > 0) && (len < bufsiz) ) {
\r
2256 buf[len] = mpx_get_byte(mpx);
\r
2257 decr(p); incr(len);
\r
2259 @<Check whether |buf| contains a color command; if not, |goto XXXX|@>
\r
2261 color_warn("long \"color\" special ignored");
\r
2264 if ( @<|buf| contains a color pop command@> ) {
\r
2265 @<Handle a color pop command@>
\r
2266 } else if ( @<|buf| contains a color push command@> ) {
\r
2267 @<Handle a color push command@>
\r
2269 color_warn("unknown \"color\" special ignored");
\r
2273 for (k = 1;k<=p;k++) (void)mpx_get_byte(mpx);
\r
2278 @<Check whether |buf| contains a color command; if not, |goto XXXX|@>=
\r
2280 || (buf[0] != 'c')
\r
2281 || (buf[1] != 'o')
\r
2282 || (buf[2] != 'l')
\r
2283 || (buf[3] != 'o')
\r
2284 || (buf[4] != 'r')
\r
2285 || (buf[5] != ' ')
\r
2288 @ @<|buf| contains a color push command@>=
\r
2290 (buf[6] == 'p') &&
\r
2291 (buf[7] == 'u') &&
\r
2292 (buf[8] == 's') &&
\r
2293 (buf[9] == 'h') &&
\r
2296 @ @<|buf| contains a color pop command@>=
\r
2298 (buf[6] == 'p') &&
\r
2299 (buf[7] == 'o') &&
\r
2302 @ The \.{color push} and \.{pop} commands imply a color stack, so we need a
\r
2303 global variable to hold that stack.
\r
2305 @d max_color_stack_depth 10 /* maximum depth of saved color stack */
\r
2307 @ Here's the actual stack variables.
\r
2310 integer color_stack_depth; /* current depth of saved color stack */
\r
2311 char *color_stack[(max_color_stack_depth+1)]; /* saved color stack */
\r
2313 @ Initialize the stack to empty.
\r
2315 @<Set initial values@>=
\r
2316 mpx->color_stack_depth = 0;
\r
2318 @ \.{color pop} just pops the stack.
\r
2320 @<Handle a color pop command@>=
\r
2321 mpx_finish_last_char(mpx);
\r
2322 if (mpx->color_stack_depth > 0 ) {
\r
2323 free(mpx->color_stack[mpx->color_stack_depth]);
\r
2324 decr(mpx->color_stack_depth);
\r
2326 color_warn("color stack underflow");
\r
2329 @ \.{color push} pushes a color onto the stack.
\r
2331 @<Handle a color push command@>=
\r
2332 mpx_finish_last_char(mpx);
\r
2333 if ( mpx->color_stack_depth >= max_color_stack_depth )
\r
2334 mpx_abort(mpx,"color stack overflow");
\r
2335 incr(mpx->color_stack_depth);
\r
2336 /* I don't know how to do string operations in Pascal. */
\r
2337 /* Skip over extra spaces after 'color push'. */
\r
2339 while ( (l < len - 1) && (buf[l] == ' ') ) incr(l);
\r
2340 if ( @<|buf[l]| contains an rgb command@> ) {
\r
2341 @<Handle a color push rgb command@>
\r
2342 } else if ( @<|buf[l]| contains a cmyk command@> ) {
\r
2343 @<Handle a color push cmyk command@>
\r
2344 } else if ( @<|buf[l]| contains a gray command@> ) {
\r
2345 @<Handle a color push gray command@>
\r
2347 @<Handle a named color push command@>
\r
2350 @ @<|buf[l]| contains an rgb command@>=
\r
2352 && (buf[l] == 'r')
\r
2353 && (buf[l+1] == 'g')
\r
2354 && (buf[l+2] == 'b')
\r
2355 && (buf[l+3] == ' ')
\r
2357 @ @<Handle a color push rgb command@>=
\r
2359 while ( (l < len) && (buf[l] == ' ') ) incr(l); /* Remove spaces at end of buf */
\r
2360 while ( (len > l) && (buf[len - 1] == ' ') ) decr(len);
\r
2361 mpx->color_stack[mpx->color_stack_depth]=xmalloc(len-l+3,1);
\r
2363 @<Copy |buf[l]| to |color_stack[color_stack_depth][k]| in tuple form@>
\r
2365 @ @<|buf[l]| contains a gray command@>=
\r
2367 && (buf[l] == 'g')
\r
2368 && (buf[l+1] == 'r')
\r
2369 && (buf[l+2] == 'a')
\r
2370 && (buf[l+3] == 'y')
\r
2371 && (buf[l+4] == ' ')
\r
2373 @ @<Handle a color push gray command@>=
\r
2375 while ( (l < len) && (buf[l] == ' ') ) incr(l); /* Remove spaces at end of buf */
\r
2376 while ( (len > l) && (buf[len - 1] == ' ') ) decr(len);
\r
2377 mpx->color_stack[mpx->color_stack_depth]=xmalloc(len-l+9,1);
\r
2378 strcpy(mpx->color_stack[mpx->color_stack_depth],"white*");
\r
2380 @<Copy |buf[l]| to |color_stack[color_stack_depth][k]| in tuple form@>
\r
2382 @ @<|buf[l]| contains a cmyk command@>=
\r
2384 && (buf[l] == 'c')
\r
2385 && (buf[l+1] == 'm')
\r
2386 && (buf[l+2] == 'y')
\r
2387 && (buf[l+3] == 'k')
\r
2388 && (buf[l+4] == ' ')
\r
2390 @ @<Handle a color push cmyk command@>=
\r
2392 while ( (l < len) && (buf[l] == ' ') ) incr(l);
\r
2393 /* Remove spaces at end of buf */
\r
2394 while ( (len > l) && (buf[len - 1] == ' ') ) decr(len);
\r
2395 mpx->color_stack[mpx->color_stack_depth]=xmalloc(len-l+7,1);
\r
2396 strcpy(mpx->color_stack[mpx->color_stack_depth],"cmyk");
\r
2398 @<Copy |buf[l]| to |color_stack[color_stack_depth][k]| in tuple form@>
\r
2400 @ @<Copy |buf[l]| to |color_stack[color_stack_depth][k]| in tuple form@>=
\r
2401 mpx->color_stack[mpx->color_stack_depth][k] = '(';
\r
2403 while ( l < len ) {
\r
2404 if ( buf[l] == ' ' ) {
\r
2405 mpx->color_stack[mpx->color_stack_depth][k] = ',';
\r
2406 while ( (l < len) && (buf[l] == ' ') ) incr(l);
\r
2409 mpx->color_stack[mpx->color_stack_depth][k] = (char)buf[l];
\r
2414 mpx->color_stack[mpx->color_stack_depth][k] = ')';
\r
2415 mpx->color_stack[mpx->color_stack_depth][k+1] = 0;
\r
2417 @ Binary-search the |named_colors| array, then push the found color onto
\r
2420 @<Handle a named color push command@>=
\r
2421 for (k = l;k<=len - 1;k++) {
\r
2422 buf[k - l] = xchr(buf[k]);
\r
2426 l = 1; r = mpx->num_named_colors;
\r
2428 while ( (l <= r) && ! found ) {
\r
2429 m = (l + r) / 2; k = strcmp((char *)(buf), mpx->named_colors[m].name);
\r
2431 mpx->color_stack[mpx->color_stack_depth]=xstrdup(mpx->named_colors[m].value);
\r
2433 } else if ( k < 0 ) {
\r
2440 color_warn_two("non-hardcoded color \"%s\" in \"color push\" command", buf);
\r
2441 mpx->color_stack[mpx->color_stack_depth]=xstrdup((char *)(buf));
\r
2444 @ Last but not least, this code snippet prints a \.{withcolor} specifier
\r
2445 for the top of the color stack, if the stack is nonempty.
\r
2447 @<Print a \.{withcolor} specifier if appropriate@>=
\r
2448 if ( mpx->color_stack_depth > 0 ) {
\r
2449 fprintf(mpx->mpxfile," withcolor %s\n",mpx->color_stack[mpx->color_stack_depth]);
\r
2455 This program reads device-independent troff output files,
\r
2456 and converts them into a symbolic form understood by MetaPost. Some
\r
2457 of the code was borrowed from DVItoMP. It understands all the D? graphics
\r
2458 functions that dpost does but it ignores `x X' device control functions
\r
2459 such as `x X SetColor:...', `x X BeginPath:', and `x X DrawPath:...'.
\r
2461 The output file is a sequence of MetaPost picture expressions, one for every
\r
2462 page in the input file. It makes no difference where the input file comes
\r
2463 from, but it is intended to process the result of running eqn and troff on
\r
2464 the output of MPtoTR. Such a file contains one page for every btex...etex
\r
2465 block in the original input. This program then creates a corresponding
\r
2466 sequence of MetaPost picture expressions for use as an auxiliary input file.
\r
2467 Since MetaPost expects such files to have the extension .mpx, the output
\r
2468 is sometimes called an `mpx' file.
\r
2470 @d SHIFTS 100 /* maximum number of characters with special shifts */
\r
2471 @d MAXCHARS 256 /* character codes fall in the range 0..MAXCHARS-1 */
\r
2473 @d is_specchar(c) (!mpx->gflag && (c)<=2) /* does charcode c identify a special char? */
\r
2474 @d LWscale 0.03 /* line width for graphics as a fraction of pointsize */
\r
2475 @d YCORR 12.0 /* V coordinate of reference point in (big) points */
\r
2478 int next_specfnt[(max_fnums+1)]; /* used to link special fonts together */
\r
2479 int shiftchar[SHIFTS]; /* charcode of character to shift, else -1 */
\r
2480 float shifth[SHIFTS];
\r
2481 float shiftv[SHIFTS]; /* shift vals/fontsize (y is upward) */
\r
2482 int shiftptr; /* number of entries in shift tables */
\r
2483 int shiftbase[(max_fnums+1)]; /* initial index into shifth,shiftv,shiftchar */
\r
2484 int specfnt; /* int. num. of first special font (or FCOUNT) */
\r
2485 int *specf_tail ; /* tail of specfnt list |(*specf_tail==FCOUNT)| */
\r
2486 float cursize; /* current type size in (big) points */
\r
2487 unsigned int curfont; /* internal number for current font */
\r
2488 float Xslant; /* degrees additional slant for all fonts */
\r
2489 float Xheight; /* yscale fonts to this height if nonzero */
\r
2490 float sizescale; /* groff font size scaling factor */
\r
2491 int gflag; /* non-zero if using groff fonts */
\r
2492 float unit; /* (big) points per troff unit (0 when unset) */
\r
2494 @ @<Set initial...@>=
\r
2495 mpx->shiftptr = 0;
\r
2496 mpx->specfnt = (max_fnums+1);
\r
2497 mpx->specf_tail = &(mpx->specfnt);
\r
2499 mpx->lnno = 0; /* this is a reset */
\r
2501 mpx->h = 0; mpx->v = 0;
\r
2504 typedef char *(*mpx_file_finder)(MPX, const char *, const char *, int);
\r
2505 enum mpx_filetype {
\r
2506 mpx_tfm_format, /* |kpse_tfm_format| */
\r
2507 mpx_vf_format, /* |kpse_vf_format| */
\r
2508 mpx_trfontmap_format, /* |kpse_mpsupport_format| */
\r
2509 mpx_trcharadj_format, /* |kpse_mpsupport_format| */
\r
2510 mpx_desc_format, /* |kpse_troff_font_format| */
\r
2511 mpx_fontdesc_format, /* |kpse_troff_font_format| */
\r
2512 mpx_specchar_format /* |kpse_mpsupport_format| */
\r
2516 mpx_file_finder find_file;
\r
2518 @ @<Declarations@>=
\r
2519 static char *mpx_find_file (MPX mpx, const char *nam, const char *mode, int ftype);
\r
2522 static char *mpx_find_file (MPX mpx, const char *nam, const char *mode, int ftype) {
\r
2524 if (mode[0] != 'r' || (! access (nam,R_OK)) || ftype) {
\r
2525 return strdup(nam);
\r
2530 @ @<Set initial...@>=
\r
2531 mpx->find_file = mpx_find_file;
\r
2533 @ @<Declarations@>=
\r
2534 static FILE *mpx_fsearch(MPX mpx, char *nam, int format);
\r
2537 static FILE *mpx_fsearch(MPX mpx, char *nam, int format) {
\r
2539 char *fname = (mpx->find_file)(mpx, nam, "r", format);
\r
2541 f = fopen(fname, "rb");
\r
2542 mpx_report(mpx,"%p = fopen(%s,\"rb\")",f, fname);
\r
2547 @ Hash tables (or rather: AVL lists)
\r
2556 static int mpx_comp_name (const void *pa, const void *pb, void *p) {
\r
2558 return strcmp (((const avl_entry *) pa)->name,
\r
2559 ((const avl_entry *) pb)->name);
\r
2563 static struct avl_table *mpx_avl_create (MPX mpx) {
\r
2564 struct avl_table *t;
\r
2565 t = avl_create(mpx_comp_name, NULL, NULL);
\r
2567 mpx_abort(mpx, "Memory allocation failure");
\r
2572 @ The only two operations on AVL lists are finding already existing
\r
2573 items, or interning new items. Finding is handled by explicit |avl_find|
\r
2574 calls where needed, but it is wise to have a wrapper around |avl_probe|
\r
2575 to check for memory errors.
\r
2578 static avl_entry * mpx_avl_probe(MPX mpx, struct avl_table *tab, avl_entry *p) {
\r
2579 avl_entry *r = (avl_entry *)avl_probe(tab,p);
\r
2581 mpx_abort(mpx,"Memory allocation failure");
\r
2587 @ Scanning Numbers
\r
2589 The standard functions atoi(), atof(), and sscanf() provide ways of reading
\r
2590 numbers from strings but they give no indication of how much of the string
\r
2591 is consumed. These homemade versions don't parse scientific notation.
\r
2594 char *arg_tail; /* char after the number just gotten; NULL on failure */
\r
2597 static int mpx_get_int(MPX mpx, char *s) {
\r
2598 register int i, d, neg;
\r
2601 for (neg = 0;; s++) {
\r
2604 else if (*s != ' ' && *s != '\t')
\r
2607 if (i = *s - '0', 0 > i || i > 9)
\r
2609 while (d = *++s - '0', 0 <= d && d <= 9)
\r
2611 mpx->arg_tail = s;
\r
2612 return neg ? -i : i;
\r
2614 mpx->arg_tail = NULL;
\r
2618 @ GROFF font description files use octal character codes
\r
2619 |groff_font(5)|: The code can be any integer. If it starts with
\r
2620 a 0 it will be interpreted as octal; if it starts with 0x
\r
2621 or 0X it will be intepreted as hexadecimal.
\r
2624 static int mpx_get_int_map(MPX mpx, char *s) {
\r
2628 i = strtol(s, &(mpx->arg_tail), 0);
\r
2629 if (s == mpx->arg_tail)
\r
2633 mpx->arg_tail = NULL;
\r
2637 @ Troff output files contain few if any non-integers, but this program is
\r
2638 prepared to read floats whenever they seem reasonable; i.e., when the
\r
2639 number is not being used for character positioning. (For non-PostScript
\r
2640 applications h and v are usually in pixels and should be integers.)
\r
2643 static float mpx_get_float(MPX mpx, char *s) {
\r
2644 register int d, neg, digits;
\r
2645 register float x, y;
\r
2649 for (neg = 0;; s++) {
\r
2652 else if (*s != ' ' && *s != '\t')
\r
2656 while (d = *s - '0', 0 <= d && d <= 9) {
\r
2663 while (d = *++s - '0', 0 <= d && d <= 9) {
\r
2670 if (digits == 0) {
\r
2671 mpx->arg_tail = NULL;
\r
2674 mpx->arg_tail = s;
\r
2675 return neg ? -x : x;
\r
2678 @ GROFF font description files have metrics field
\r
2679 of comma-separated integers. Traditional troff
\r
2680 have a float in this position. The value is not
\r
2681 used anyway - thus just skip the value,
\r
2682 eat all non-space chars.
\r
2685 static float mpx_get_float_map(MPX mpx, char *s) {
\r
2687 while (isspace(*s))
\r
2689 while (!isspace(*s) && *s)
\r
2692 mpx->arg_tail = s;
\r
2697 @ Reading Initialization Files
\r
2699 Read the database file, reserve internal font numbers and set
\r
2700 the |font_name| entries. Each line in the database file contains
\r
2701 |<troff-name>\t,PostScript-name>\t<TeX-name>|
\r
2703 |<troff-name>\t,PostScript-name>|
\r
2704 if the \TeX\ name matches the PostScript name. (|\t| means one or more tabs.)
\r
2707 struct avl_table *trfonts;
\r
2710 static void mpx_read_fmap(MPX mpx, char *dbase) {
\r
2713 char *nam; /* a font name being read */
\r
2716 fin = mpx_fsearch(mpx,dbase, mpx_trfontmap_format);
\r
2718 mpx_abort(mpx,"Cannot find %s", dbase);
\r
2720 mpx->trfonts = mpx_avl_create (mpx);
\r
2721 while ((buf = mpx_getline(mpx,fin)) != NULL) {
\r
2722 if (mpx->nfonts == (max_fnums+1))
\r
2723 mpx_abort(mpx,"Need to increase max_fnums");
\r
2725 while (*buf && *buf != '\t')
\r
2727 tmp = xmalloc(sizeof(avl_entry),1);
\r
2729 tmp->num = (int)mpx->nfonts++;
\r
2730 (void)mpx_avl_probe (mpx,mpx->trfonts, tmp) ;
\r
2733 do buf++; while (*buf == '\t');
\r
2734 while (*buf && *buf != '\t'); buf++; /* skip over psname */
\r
2735 do buf++; while (*buf == '\t');
\r
2738 while (*buf); buf++;
\r
2740 mpx->font_name[tmp->num] = xstrdup(nam);
\r
2741 mpx->font_num[tmp->num] = -1; /* indicate font is not mounted */
\r
2744 mpx_fclose(mpx,fin);
\r
2748 @ Some characters need their coordinates shifted in order to agree with
\r
2749 troff's view of the world. Logically, this information belongs in the
\r
2750 font description files but it actually resides in a PostScript prolog
\r
2751 that the troff output processor dpost reads. Since that file is in
\r
2752 PostScript and subject to change, we read the same information from
\r
2753 a small auxiliary file that gives shift amounts relative to the font
\r
2754 size with y upward.
\r
2757 The PostScript prologue in GNU groff's font directory does not
\r
2758 contain any character shift information, so the following function
\r
2759 becomes redundant. Simply keeping an empty "trchars.adj" file
\r
2760 around will do fine without requiring any changes to this program.
\r
2763 static void mpx_read_char_adj(MPX mpx, char *adjfile) {
\r
2766 avl_entry tmp, *p;
\r
2769 fin = mpx_fsearch(mpx,adjfile, mpx_trcharadj_format);
\r
2771 mpx_abort(mpx,"Cannot find %s", adjfile);
\r
2773 for (i = 0; i < mpx->nfonts; i++)
\r
2774 mpx->shiftbase[i] = 0;
\r
2775 while (fgets(buf, 200, fin) != NULL) {
\r
2776 if (mpx->shiftptr == SHIFTS - 1)
\r
2777 mpx_abort(mpx,"Need to increase SHIFTS");
\r
2778 if (buf[0] != ' ' && buf[0] != '\t') {
\r
2779 for (i = 0; buf[i] != '\0'; i++)
\r
2780 if (buf[i] == '\n')
\r
2782 mpx->shiftchar[mpx->shiftptr++] = -1;
\r
2784 p = (avl_entry *)avl_find (mpx->trfonts, &tmp);
\r
2786 mpx_abort(mpx,"%s refers to unknown font %s", adjfile, buf);
\r
2787 mpx->shiftbase[p->num] = mpx->shiftptr;
\r
2790 mpx->shiftchar[mpx->shiftptr] = mpx_get_int(mpx,buf);
\r
2791 mpx->shifth[mpx->shiftptr] = mpx_get_float(mpx,mpx->arg_tail);
\r
2792 mpx->shiftv[mpx->shiftptr] = -mpx_get_float(mpx,mpx->arg_tail);
\r
2793 if (mpx->arg_tail == NULL)
\r
2794 mpx_abort(mpx,"Bad shift entry : \"%s\"", buf);
\r
2798 mpx->shiftchar[mpx->shiftptr++] = -1;
\r
2799 mpx_fclose(mpx,fin);
\r
2802 @ Read the DESC file of the troff device to gather information
\r
2803 about sizescale and whether running under groff.
\r
2805 Ignore all commands not specially handled. This relieves
\r
2806 of collecting commands without arguments here and also
\r
2807 makes the program more robust in case of future DESC
\r
2811 static void mpx_read_desc(MPX mpx) {
\r
2812 const char *const k1[] = {
\r
2813 "res", "hor", "vert", "unitwidth", "paperwidth",
\r
2814 "paperlength", "biggestfont", "spare2", "encoding",
\r
2817 const char *const g1[] = {
\r
2818 "family", "paperheight", "postpro", "prepro",
\r
2819 "print", "image_generator", "broken",
\r
2826 fp = mpx_fsearch(mpx,"DESC", mpx_desc_format);
\r
2828 mpx_abort(mpx,"Cannot find DESC");
\r
2829 while (fscanf(fp, "%199s", cmd) != EOF) {
\r
2830 if (*cmd == '#') {
\r
2831 while ((i = getc(fp)) != EOF && i != '\n');
\r
2834 if (strcmp(cmd, "fonts") == 0) {
\r
2835 if (fscanf(fp, "%d", &n) != 1)
\r
2837 for (i = 0; i < n; i++)
\r
2838 if (fscanf(fp, "%*s") == EOF)
\r
2840 } else if (strcmp(cmd, "sizes") == 0) {
\r
2841 while (fscanf(fp, "%d", &n) == 1 && n != 0);
\r
2842 } else if (strcmp(cmd, "styles") == 0 ||
\r
2843 strcmp(cmd, "papersize") == 0) {
\r
2845 while ((i = getc(fp)) != EOF && i != '\n');
\r
2846 } else if (strcmp(cmd, "sizescale") == 0) {
\r
2847 if (fscanf(fp, "%d", &n) == 1)
\r
2848 mpx->sizescale = (float)n;
\r
2850 } else if (strcmp(cmd, "charset") == 0) {
\r
2853 for (i = 0; k1[i]; i++)
\r
2854 if (strcmp(cmd, k1[i]) == 0) {
\r
2855 if (fscanf(fp, "%*s") == EOF)
\r
2860 for (i = 0; g1[i]; i++)
\r
2861 if (strcmp(cmd, g1[i]) == 0) {
\r
2862 if (fscanf(fp, "%*s") == EOF)
\r
2872 @ Given one line from the character description file for the font with
\r
2873 internal number f, save the appropriate data in the charcodes[f] table.
\r
2874 A return value of zero indicates a syntax error.
\r
2877 GNU groff uses an extended font description file format documented
\r
2878 in |groff_font(5)|. In order to allow parsing of groff's font files,
\r
2879 this function needs to be rewritten as follows:
\r
2881 \item{1.}The `metrics' field parsed by |mpx_get_float(lin);| may include
\r
2882 a comma-separated list of up to six decimal integers rather
\r
2883 than just a single floating-point number.
\r
2885 \item{2.}The `charcode' field parsed by |lastcode = mpx_get_int(arg_tail);|
\r
2886 may be given either in decimal, octal, or hexadecimal format.
\r
2889 struct avl_table *charcodes[(max_fnums+1)]; /* hash tables for translating char names */
\r
2892 static int mpx_scan_desc_line(MPX mpx, int f, char *lin) {
\r
2893 static int lastcode;
\r
2897 while (*lin != ' ' && *lin != '\t' && *lin != '\0')
\r
2899 s = xmalloc((size_t)(lin-t+1),1);
\r
2900 strncpy(s,t,(size_t)(lin-t));
\r
2901 while (*lin == ' ' || *lin == '\t')
\r
2903 if (*lin == '"') {
\r
2904 if (lastcode < MAXCHARS) {
\r
2905 tmp = xmalloc(sizeof(avl_entry),1);
\r
2907 tmp->num = lastcode;
\r
2908 (void)mpx_avl_probe (mpx, mpx->charcodes[f],tmp);
\r
2911 (void) mpx_get_float_map(mpx,lin);
\r
2912 (void) mpx_get_int(mpx,mpx->arg_tail);
\r
2913 lastcode = mpx_get_int_map(mpx,mpx->arg_tail);
\r
2914 if (mpx->arg_tail == NULL)
\r
2916 if (lastcode < MAXCHARS) {
\r
2917 tmp = xmalloc(sizeof(avl_entry),1);
\r
2919 tmp->num = lastcode;
\r
2920 (void)mpx_avl_probe (mpx, mpx->charcodes[f],tmp);
\r
2926 @ Read the font description file for the font with the given troff name
\r
2927 and update the data structures. The result is the internal font number.
\r
2930 static int mpx_read_fontdesc(MPX mpx, char *nam) { /* troff name */
\r
2932 avl_entry tmp, *p;
\r
2933 FILE *fin; /* input file */
\r
2934 int f; /* internal font number */
\r
2936 if (mpx->unit == 0.0)
\r
2937 mpx_abort(mpx, "Resolution is not set soon enough");
\r
2939 p = (avl_entry *)avl_find (mpx->trfonts, &tmp);
\r
2941 mpx_abort(mpx, "Font was not in map file");
\r
2943 fin = mpx_fsearch(mpx, nam, mpx_fontdesc_format);
\r
2945 mpx_abort(mpx,"Cannot find %s", nam);
\r
2947 if (fgets(buf, 200, fin) == NULL)
\r
2948 mpx_abort(mpx, "Description file for %s ends unexpectedly", nam);
\r
2949 if (strncmp(buf, "special", 7) == 0) {
\r
2950 *(mpx->specf_tail) = f;
\r
2951 mpx->next_specfnt[f] = (max_fnums+1);
\r
2952 mpx->specf_tail = &(mpx->next_specfnt[f]);
\r
2953 } else if (strncmp(buf, "charset", 7) == 0)
\r
2956 mpx->charcodes[f] = mpx_avl_create (mpx);
\r
2957 while (fgets(buf, 200, fin) != NULL)
\r
2958 if (mpx_scan_desc_line(mpx, f, buf) == 0)
\r
2959 mpx_abort(mpx, "%s has a bad line in its description file: %s", nam, buf);
\r
2960 mpx_fclose(mpx,fin);
\r
2964 @ Page and Character Output
\r
2967 boolean graphics_used; /* nonzero if any graphics seen on this page */
\r
2969 float dmp_str_v; /* corrected start pos for current out string */
\r
2970 float dmp_str_h2; /* where the current output string ends */
\r
2971 float str_size; /* point size for this text string */
\r
2974 @ Print any transformations required by the current Xslant and Xheight settings.
\r
2977 static void mpx_slant_and_ht(MPX mpx);
\r
2980 static void mpx_slant_and_ht(MPX mpx) {
\r
2982 if (mpx->Xslant != 0.0) {
\r
2983 fprintf(mpx->mpxfile, " slanted%.5f", mpx->Xslant);
\r
2986 if (mpx->Xheight != mpx->cursize && mpx->Xheight != 0.0 && mpx->cursize != 0.0) {
\r
2987 fprintf(mpx->mpxfile, " yscaled%.4f", mpx->Xheight / mpx->cursize);
\r
2991 fprintf(mpx->mpxfile, "\n ");
\r
2995 @ Output character number c in the font with internal number f.
\r
2998 static void mpx_set_num_char(MPX mpx, int f, int c) {
\r
2999 float hh, vv; /* corrected versions of h, v */
\r
3004 for (i = mpx->shiftbase[f]; mpx->shiftchar[i] >= 0; i++)
\r
3005 if (mpx->shiftchar[i] == c) {
\r
3006 hh += (mpx->cursize / mpx->unit) * mpx->shifth[i];
\r
3007 vv += (mpx->cursize / mpx->unit) * mpx->shiftv[i];
\r
3010 if (hh - mpx->dmp_str_h2 >= 1.0 || mpx->dmp_str_h2 - hh >= 1.0 ||
\r
3011 vv - mpx->dmp_str_v >= 1.0 || mpx->dmp_str_v - vv >= 1.0 ||
\r
3012 f != mpx->str_f || mpx->cursize != mpx->str_size) {
\r
3013 if (mpx->str_f >= 0)
\r
3014 mpx_finish_last_char(mpx);
\r
3015 else if (!mpx->fonts_used)
\r
3016 mpx_prepare_font_use(mpx); /* first font usage on this page */
\r
3017 if (!mpx->font_used[f])
\r
3018 mpx_first_use(mpx,f); /* first use of font f on this page */
\r
3019 fprintf(mpx->mpxfile, "_s((");
\r
3020 mpx->print_col = 3;
\r
3022 mpx->dmp_str_v = vv;
\r
3023 mpx->dmp_str_h1 = hh;
\r
3024 mpx->str_size = mpx->cursize;
\r
3026 mpx_print_char(mpx, (unsigned char)c);
\r
3027 mpx->dmp_str_h2 = hh + char_width(f,c);
\r
3030 @ Output a string.
\r
3033 static void mpx_set_string(MPX mpx, char *cname) {
\r
3034 float hh; /* corrected version of h, current horisontal position */
\r
3039 mpx_set_num_char(mpx,(int)mpx->curfont, *cname);
\r
3040 hh += char_width(mpx->curfont,(int)*cname);
\r
3041 while (*++cname) {
\r
3042 mpx_print_char(mpx,(unsigned char)*cname);
\r
3043 hh += char_width(mpx->curfont,(int)*cname);
\r
3045 mpx->h = (double)floor(hh+0.5);
\r
3046 mpx_finish_last_char(mpx);
\r
3049 @ Special Characters
\r
3051 Given the troff name of a special character, this routine finds its
\r
3052 definition and copies it to the MPX file. It also finds the name of
\r
3053 the vardef macro and returns that name. The name should be C.<something>.
\r
3056 TH: A bit of trickery is added here for case-insensitive
\r
3057 file systems. This aliasing allows the CHARLIB directory
\r
3058 to exist on DVDs, for example.
\r
3059 It is a hack, I know. I've stuck to names on TeXLive.
\r
3061 @d test_redo_search do {
\r
3063 deff = mpx_fsearch(mpx, cname, mpx_specchar_format);
\r
3067 static char *mpx_copy_spec_char(MPX mpx, char *cname) {
\r
3071 char specintro[] = "vardef "; /* MetaPost name follows this */
\r
3072 unsigned k = 0; /* how much of specintro so far */
\r
3073 if (strcmp(cname, "ao") == 0) {
\r
3074 deff = mpx_fsearch(mpx, "ao.x", mpx_specchar_format);
\r
3076 } else if (strcmp(cname, "lh") == 0) {
\r
3077 deff = mpx_fsearch(mpx, "lh.x", mpx_specchar_format);
\r
3079 } else if (strcmp(cname, "~=") == 0) {
\r
3080 deff = mpx_fsearch(mpx, "twiddle", mpx_specchar_format);
\r
3083 deff = mpx_fsearch(mpx, cname, mpx_specchar_format);
\r
3086 mpx_abort(mpx, "No vardef in charlib/%s", cname);
\r
3088 while (k < (unsigned)strlen(specintro)) {
\r
3089 if ((c = getc(deff)) == EOF)
\r
3090 mpx_abort(mpx, "No vardef in charlib/%s", cname);
\r
3091 putc(c, mpx->mpxfile);
\r
3092 if (c == specintro[k])
\r
3097 s = xmalloc(mpx->bufsize,1);
\r
3099 while ((c = getc(deff)) != '(') {
\r
3101 mpx_abort(mpx, "vardef in charlib/%s has no arguments", cname);
\r
3102 putc(c, mpx->mpxfile);
\r
3105 putc(c, mpx->mpxfile);
\r
3107 while ((c = getc(deff)) != EOF);
\r
3108 putc(c, mpx->mpxfile);
\r
3113 @ When given a character name instead of a number, we need to check if
\r
3114 it is a special character and download the definition if necessary.
\r
3115 If the character is not in the current font we have to search the special
\r
3119 struct avl_table *spec_tab;
\r
3121 @ The |spec_tab| avl table combines character names with macro names.
\r
3130 static void mpx_set_char(MPX mpx, char *cname) {
\r
3132 avl_entry tmp, *p;
\r
3135 if (*cname == ' ' || *cname == '\t')
\r
3137 f = (int)mpx->curfont;
\r
3139 p = avl_find(mpx->charcodes[f], &tmp);
\r
3141 for (f = mpx->specfnt; f != (max_fnums+1); f = mpx->next_specfnt[f]) {
\r
3142 p = avl_find(mpx->charcodes[f], &tmp);
\r
3146 mpx_abort(mpx, "There is no character %s", cname);
\r
3150 if (!is_specchar(c)) {
\r
3151 mpx_set_num_char(mpx, f, c);
\r
3153 if (mpx->str_f >= 0)
\r
3154 mpx_finish_last_char(mpx);
\r
3155 if (!mpx->fonts_used)
\r
3156 mpx_prepare_font_use(mpx);
\r
3157 if (!mpx->font_used[f])
\r
3158 mpx_first_use(mpx, f);
\r
3159 if (mpx->spec_tab)
\r
3160 mpx->spec_tab = mpx_avl_create (mpx);
\r
3161 sp = xmalloc(sizeof(spec_entry),1);
\r
3164 sp = (spec_entry *)avl_probe(mpx->spec_tab,sp);
\r
3166 mpx_abort(mpx,"Memory allocation failure");
\r
3167 if (sp->mac == NULL) {
\r
3168 sp->mac = mpx_copy_spec_char(mpx, cname); /* this won't be NULL */
\r
3170 fprintf(mpx->mpxfile, "_s(%s(n%d)", sp->mac, mpx->font_num[f]);
\r
3171 mpx_slant_and_ht(mpx);
\r
3172 fprintf(mpx->mpxfile, ",%.5f,%.4f,%.4f);\n",
\r
3173 (mpx->cursize/mpx->font_design_size[f])*1.00375, mpx->h*mpx->unit, YCORR-mpx->v*mpx->unit);
\r
3177 @ Font Definitions
\r
3179 Mount the font with troff name nam at external font number n and read any
\r
3180 necessary font files.
\r
3183 static void mpx_do_font_def(MPX mpx, int n, char *nam) {
\r
3186 avl_entry tmp, *p;
\r
3188 p = (avl_entry *) avl_find (mpx->trfonts, &tmp);
\r
3190 mpx_abort(mpx, "Font %s was not in map file", nam);
\r
3192 if ( mpx->info_base[f]==max_widths ) {
\r
3193 mpx_read_fontdesc(mpx, nam);
\r
3194 mpx->cur_name = xstrdup(mpx->font_name[f]);
\r
3195 if (! mpx_open_tfm_file(mpx) )
\r
3196 font_abort("No TFM file found for ",f);
\r
3197 @.no TFM file found@>
\r
3198 mpx_in_TFM(mpx, f);
\r
3200 for (k = 0; k < mpx->nfonts; k++)
\r
3201 if (mpx->font_num[k] == n)
\r
3202 mpx->font_num[k] = -1;
\r
3203 mpx->font_num[f] = n;
\r
3204 @<Do any other initialization required for the new font |f|@>;
\r
3209 @ Time on `makepath pencircle'
\r
3211 Given the control points of a cubic Bernstein polynomial, evaluate it at t.
\r
3213 @d Speed ((float) (PI/4.0))
\r
3216 static float mpx_b_eval(const float *xx, float t) {
\r
3218 register int i, j;
\r
3219 for (i = 0; i <= 3; i++)
\r
3221 for (i = 3; i > 0; i--)
\r
3222 for (j = 0; j < i; j++)
\r
3223 zz[j] += t * (zz[j + 1] - zz[j]);
\r
3228 @ Find the direction angle at time t on the path `makepath pencircle'.
\r
3229 The tables below give the Bezier control points for MetaPost's cubic
\r
3230 approximation to the first octant of a unit circle.
\r
3233 static const float xx[] = { 1.0, 1.0, 0.8946431597, 0.7071067812 };
\r
3234 static const float yy[] = { 0.0, 0.2652164899, 0.5195704026, 0.7071067812 };
\r
3237 static float mpx_circangle(float t) {
\r
3241 return (float) atan(mpx_b_eval(yy, t) /
\r
3242 mpx_b_eval(xx, t)) + ti * Speed;
\r
3246 @ Find the spline parameter where `makepath pencircle' comes closest to
\r
3247 (cos(a)/2,sin(a)/2).
\r
3250 static float mpx_circtime(float a) {
\r
3254 for (i = 2; --i >= 0;)
\r
3255 t += (a - mpx_circangle(t)) / Speed;
\r
3265 float gy; /* current point for graphics (init. (h,YCORR/mpx->unit-v) */
\r
3268 static void mpx_prepare_graphics(MPX mpx) {
\r
3270 fprintf(mpx->mpxfile, "vardef _D(expr _d)expr _q =\n");
\r
3271 fprintf(mpx->mpxfile,
\r
3272 " addto _p doublepath _q withpen pencircle scaled _d; enddef;\n");
\r
3273 mpx->graphics_used = true;
\r
3277 @ This function prints the current position (gx,gy). Then if it can read dh dv
\r
3278 from string s, it increments (gx,gy) and prints "--". By returning the rest
\r
3279 of the string s or NULL if nothing could be read from s, it provides the
\r
3280 argument for the next iteration.
\r
3283 static char *mpx_do_line(MPX mpx, char *s) {
\r
3286 fprintf(mpx->mpxfile, "(%.3f,%.3f)", mpx->gx * mpx->unit, mpx->gy * mpx->unit);
\r
3287 dh = mpx_get_float(mpx, s);
\r
3288 dv = mpx_get_float(mpx, mpx->arg_tail);
\r
3289 if (mpx->arg_tail == NULL)
\r
3293 fprintf(mpx->mpxfile, "--\n");
\r
3294 return mpx->arg_tail;
\r
3298 @ Function |spline_seg()| reads two pairs of (dh,dv) increments and prints the
\r
3299 corresponding quadratic B-spline segment, leaving the ending point to be
\r
3300 printed next time. The return value is the string with the first (dh,dv)
\r
3301 pair lopped off. If only one pair of increments is found, we prepare to
\r
3302 terminate the iteration by printing last time's ending point and returning
\r
3306 static char * mpx_spline_seg(MPX mpx, char *s) {
\r
3307 float dh1, dv1, dh2, dv2;
\r
3309 dh1 = mpx_get_float(mpx, s);
\r
3310 dv1 = mpx_get_float(mpx, mpx->arg_tail);
\r
3311 if (mpx->arg_tail == NULL)
\r
3312 mpx_abort(mpx, "Missing spline increments");
\r
3313 s = mpx->arg_tail;
\r
3314 fprintf(mpx->mpxfile, "(%.3f,%.3f)", (mpx->gx + .5 * dh1) * mpx->unit,
\r
3315 (mpx->gy - .5 * dv1) * mpx->unit);
\r
3318 dh2 = mpx_get_float(mpx, s);
\r
3319 dv2 = mpx_get_float(mpx, mpx->arg_tail);
\r
3320 if (mpx->arg_tail == NULL)
\r
3322 fprintf(mpx->mpxfile, "..\ncontrols (%.3f,%.3f) and (%.3f,%.3f)..\n",
\r
3323 (mpx->gx - dh1 / 6.0) * mpx->unit, (mpx->gy + dv1 / 6.0) * mpx->unit,
\r
3324 (mpx->gx + dh2 / 6.0) * mpx->unit, (mpx->gy - dv2 / 6.0) * mpx->unit);
\r
3329 @ Draw an ellipse with the given major and minor axes.
\r
3332 static void mpx_do_ellipse(MPX mpx, float a, float b) {
\r
3334 fprintf(mpx->mpxfile, "makepath(pencircle xscaled %.3f\n yscaled %.3f",
\r
3335 a * mpx->unit, b * mpx->unit);
\r
3336 fprintf(mpx->mpxfile, " shifted (%.3f,%.3f));\n", (mpx->gx + .5 * a) * mpx->unit,
\r
3337 mpx->gy * mpx->unit);
\r
3342 @ Draw a counter-clockwise arc centered at (cx,cy) with initial and final radii
\r
3343 (ax,ay) and (bx,by) respectively.
\r
3347 void mpx_do_arc(MPX mpx, float cx, float cy, float ax, float ay, float bx, float by) {
\r
3350 t1 = mpx_circtime(atan2(ay, ax));
\r
3351 t2 = mpx_circtime(atan2(by, bx));
\r
3354 fprintf(mpx->mpxfile, "subpath (%.5f,%.5f) of\n", t1, t2);
\r
3355 fprintf(mpx->mpxfile,
\r
3356 " makepath(pencircle scaled %.3f shifted (%.3f,%.3f));\n",
\r
3357 2.0 * sqrt(ax * ax + ay * ay) * mpx->unit, cx * mpx->unit, cy * mpx->unit);
\r
3358 mpx->gx = cx + bx;
\r
3359 mpx->gy = cy + by;
\r
3364 @ String s is everything following the initial `D' in a troff graphics command.
\r
3367 static void mpx_do_graphic(MPX mpx, char *s) {
\r
3368 float h1, v1, h2, v2;
\r
3370 mpx_finish_last_char(mpx);
\r
3371 /* GROFF uses Fd to set fill color for solid drawing objects to the
\r
3372 default, so just ignore that.
\r
3374 if (s[0] == 'F' && s[1] == 'd')
\r
3376 mpx->gx = (float) mpx->h;
\r
3377 mpx->gy = YCORR / mpx->unit - ((float) mpx->v);
\r
3378 if (!mpx->graphics_used)
\r
3379 mpx_prepare_graphics(mpx);
\r
3380 fprintf(mpx->mpxfile, "D(%.4f) ", LWscale * mpx->cursize);
\r
3383 h1 = mpx_get_float(mpx,s);
\r
3384 if (mpx->arg_tail == NULL)
\r
3385 mpx_abort(mpx,"Bad argument in %s", s-2);
\r
3386 mpx_do_ellipse(mpx,h1, h1);
\r
3389 h1 = mpx_get_float(mpx,s);
\r
3390 v1 = mpx_get_float(mpx,mpx->arg_tail);
\r
3391 if (mpx->arg_tail == NULL)
\r
3392 mpx_abort(mpx,"Bad argument in %s", s - 2);
\r
3393 mpx_do_ellipse(mpx,h1, v1);
\r
3396 fprintf(mpx->mpxfile, "reverse ");
\r
3397 /* fall through */
\r
3399 h1 = mpx_get_float(mpx,s);
\r
3400 v1 = mpx_get_float(mpx,mpx->arg_tail);
\r
3401 h2 = mpx_get_float(mpx,mpx->arg_tail);
\r
3402 v2 = mpx_get_float(mpx,mpx->arg_tail);
\r
3403 if (mpx->arg_tail == NULL)
\r
3404 mpx_abort(mpx,"Bad argument in %s", s - 2);
\r
3405 mpx_do_arc(mpx,mpx->gx + h1, mpx->gy - v1, -h1, v1, h2, -v2);
\r
3410 s = mpx_do_line(mpx,s);
\r
3411 fprintf(mpx->mpxfile, ";\n");
\r
3415 s = mpx_spline_seg(mpx,s);
\r
3416 while (s != NULL);
\r
3417 fprintf(mpx->mpxfile, ";\n");
\r
3420 fprintf(mpx->mpxfile, "(%.3f,%.3f)--", mpx->gx * mpx->unit, mpx->gy * mpx->unit);
\r
3422 s = mpx_spline_seg(mpx,s);
\r
3423 while (s != NULL);
\r
3424 fprintf(mpx->mpxfile, "--(%.3f,%.3f);\n", mpx->gx * mpx->unit, mpx->gy * mpx->unit);
\r
3427 mpx_abort(mpx,"Unknown drawing function %s", s - 2);
\r
3429 mpx->h = (int) floor(mpx->gx + .5);
\r
3430 mpx->v = (int) floor(YCORR / mpx->unit + .5 - mpx->gy);
\r
3435 @ Interpreting Troff Output
\r
3438 static void mpx_change_font(MPX mpx, int f) {
\r
3439 for (mpx->curfont = 0; mpx->curfont < mpx->nfonts; mpx->curfont++)
\r
3440 if (mpx->font_num[mpx->curfont] == f)
\r
3442 mpx_abort(mpx,"Bad font setting");
\r
3446 @ String s0 is everything following the initial `x' in a troff device control
\r
3447 command. A zero result indicates a stop command.
\r
3450 static int mpx_do_x_cmd(MPX mpx, char *s0)
\r
3457 while (*s == ' ' || *s == '\t')
\r
3461 if (mpx->unit != 0.0)
\r
3462 mpx_abort(mpx,"Attempt to reset resolution");
\r
3463 while (*s != ' ' && *s != '\t')
\r
3465 mpx->unit = mpx_get_float(mpx,s);
\r
3466 if (mpx->unit <= 0.0)
\r
3467 mpx_abort(mpx,"Bad resolution: x %s", s0);
\r
3468 mpx->unit = 72.0 / mpx->unit;
\r
3471 while (*s != ' ' && *s != '\t')
\r
3473 n = mpx_get_int(mpx,s);
\r
3474 if (mpx->arg_tail == NULL)
\r
3475 mpx_abort(mpx,"Bad font def: x %s", s0);
\r
3476 s = mpx->arg_tail;
\r
3477 while (*s == ' ' || *s == '\t')
\r
3479 mpx_do_font_def(mpx,n, s);
\r
3484 while (*s != ' ' && *s != '\t')
\r
3486 mpx->Xheight = mpx_get_float(mpx,s);
\r
3487 /* GROFF troff output is scaled |groff_out(5)|:
\r
3488 The argument to the s command is in scaled
\r
3489 points (units of points/n, where n is the argument
\r
3490 to the sizescale command in the DESC file.) The
\r
3491 argument to the x Height command is also in scaled points.
\r
3492 sizescale for groff devps is 1000
\r
3494 if (mpx->sizescale != 0.0) {
\r
3495 if (mpx->unit != 0.0)
\r
3496 mpx->Xheight *= mpx->unit; /* ??? */
\r
3498 mpx->Xheight /= mpx->sizescale;
\r
3500 if (mpx->Xheight == mpx->cursize)
\r
3501 mpx->Xheight = 0.0;
\r
3504 while (*s != ' ' && *s != '\t')
\r
3506 mpx->Xslant = mpx_get_float(mpx,s) * (PI / 180.0);
\r
3507 x = cos(mpx->Xslant);
\r
3508 if (-1e-4 < x && x < 1e-4)
\r
3509 mpx_abort(mpx,"Excessive slant");
\r
3510 mpx->Xslant = sin(mpx->Xslant) / x;
\r
3513 /* do nothing */ ;
\r
3519 @ This routine reads commands from the troff output file up to and including
\r
3520 the next `p' or `x s' command. It also calls |set_num_char()| and |set_char()|
\r
3521 to generate output when appropriate. A zero result indicates that there
\r
3522 are no more pages to do.
\r
3525 GNU groff uses an extended device-independent output file format
\r
3526 documented in |groff_out(5)|. In order to allow parsing of groff's
\r
3527 output files, this function either needs to be extended to support
\r
3528 the new command codes, or else the use of the "t" and "u" commands
\r
3529 must be disabled by removing the line "tcommand" from the DESC file
\r
3530 in the \$(prefix)/lib/groff/devps directory.
\r
3533 static int mpx_do_page (MPX mpx, FILE *trf) {
\r
3537 mpx->h = mpx->v = 0;
\r
3538 while ((buf = mpx_getline(mpx, trf)) != NULL) {
\r
3541 while (*c != '\0') {
\r
3549 mpx->cursize = mpx_get_float(mpx,c + 1);
\r
3550 /* GROFF troff output is scaled
\r
3551 |groff_out(5)|: The argument to the s command is in scaled
\r
3552 points (units of points/n, where n is the argument
\r
3553 to the sizescale command in the DESC file.) The
\r
3554 argument to the x Height command is also in scaled
\r
3556 sizescale for groff devps is 1000
\r
3558 if (mpx->sizescale != 0.0) {
\r
3559 if (mpx->unit != 0.0)
\r
3560 mpx->cursize *= mpx->unit; /* ??? */
\r
3562 mpx->cursize /= mpx->sizescale;
\r
3566 mpx_change_font(mpx, mpx_get_int(mpx,c + 1));
\r
3570 mpx_abort(mpx, "Bad c command in troff output");
\r
3577 while (*cc != ' ' && *cc != '\t' && *cc != '\0');
\r
3580 mpx_set_num_char(mpx, (int)mpx->curfont, mpx_get_int(mpx,c + 1));
\r
3583 mpx->h = mpx_get_int(mpx, c + 1);
\r
3586 mpx->v = mpx_get_int(mpx, c + 1);
\r
3589 mpx->h += mpx_get_int(mpx, c + 1);
\r
3592 mpx->v += mpx_get_int(mpx, c + 1);
\r
3604 if (c[1] < '0' || c[1] > '9' || c[2] == '\0')
\r
3605 mpx_abort(mpx, "Bad nnc command in troff output");
\r
3606 mpx->h += 10 * (c[0] - '0') + c[1] - '0';
\r
3613 (void) mpx_get_int(mpx, c + 1);
\r
3614 (void) mpx_get_int(mpx, mpx->arg_tail);
\r
3617 mpx_do_graphic(mpx, c + 1);
\r
3620 if (!mpx_do_x_cmd(mpx, c + 1))
\r
3626 /* GROFF uses this command to report filename */
\r
3629 /* GROFF uses this command to control color */
\r
3632 /* GROFF uses this command to output a word with additional
\r
3633 white space between characters, not implemented
\r
3635 mpx_abort(mpx, "Bad command in troff output\n"
\r
3636 "change the DESC file for your GROFF PostScript device, remove tcommand");
\r
3638 /* GROFF uses this command to output a word */
\r
3642 while (*cc != ' ' && *cc != '\t' && *cc != '\0');
\r
3645 mpx_set_string(mpx, ++c);
\r
3650 mpx_abort(mpx, "Bad command in troff output");
\r
3656 mpx_set_char(mpx, ++c);
\r
3661 c = mpx->arg_tail;
\r
3663 eoln: /* do nothing */ ;
\r
3669 @ Main Dmp Program
\r
3671 @d dbname "trfonts.map" /* file for table of troff \& TFM font names */
\r
3672 @d adjname "trchars.adj" /* file for character shift amounts */
\r
3675 static int mpx_dmp(MPX mpx, char *infile) {
\r
3677 FILE *trf = mpx_xfopen(mpx,infile, "r");
\r
3678 mpx_open_mpxfile(mpx);
\r
3679 if (mpx->banner != NULL)
\r
3680 fprintf (mpx->mpxfile,"%s\n",mpx->banner);
\r
3681 mpx_read_desc(mpx);
\r
3682 mpx_read_fmap(mpx,dbname);
\r
3684 mpx_read_char_adj(mpx,adjname);
\r
3685 if (mpx_do_page(mpx, trf)) {
\r
3687 @<Do initialization required before starting a new page@>;
\r
3688 mpx_start_picture(mpx);
\r
3689 more = mpx_do_page(mpx,trf);
\r
3690 mpx_stop_picture(mpx);
\r
3691 fprintf(mpx->mpxfile, "mpxbreak\n");
\r
3694 mpx_fclose(mpx,trf);
\r
3695 mpx_fclose(mpx,mpx->mpxfile);
\r
3696 if ( mpx->history<=mpx_cksum_trouble )
\r
3699 return mpx->history;
\r
3706 Make an MPX file from the labels in a MetaPost source file,
\r
3707 using mpto and either dvitomp (TeX) or dmp (troff).
\r
3709 Started from a shell script initially based on John Hobby's original
\r
3710 version, that was then translated to C by Akira Kakuto (Aug 1997,
\r
3711 Aug 2001), and updated and largely rewritten by Taco Hoekwater (Nov 2006).
\r
3714 Differences between the script and this C version:
\r
3716 The script trapped HUP, INT, QUIT and TERM for cleaning up
\r
3717 temporary files. This is a refinement, and not portable.
\r
3719 The script put its own directory in front of the
\r
3720 executable search PATH. This is not portable either, and
\r
3721 it seems a safe bet that normal users do not have 'mpto',
\r
3722 'dvitomp', or 'dmp' commands in their path.
\r
3724 The command-line '-troff' now also accepts an optional argument.
\r
3726 The troff infile for error diagnostics is renamed "mpxerr.i",
\r
3727 not plain "mpxerr".
\r
3729 The original script deleted mpx*.* in the cleanup process.
\r
3731 That is a bit harder in C, because it requires reading the contents
\r
3732 of the current directory. The current program assumes that
\r
3733 opendir(), readdir() and closedir() are known everywhere where
\r
3734 the function getcwd() exists (except on WIN32, where it uses
\r
3735 |_findfirst| \& co).
\r
3737 If this assumption is false, you can define |NO_GETCWD|, and makempx
\r
3738 will revert to trying to delete only a few known extensions
\r
3740 There is a -debug switch, preventing the removal of tmp files
\r
3742 @d TMPNAME_EXT(a,b) { strcpy(a,tmpname); strcat(a,b); }
\r
3746 #define TEXERR "mpxerr.tex"
\r
3747 #define DVIERR "mpxerr.dvi"
\r
3748 #define TROFF_INERR "mpxerr.i"
\r
3749 #define TROFF_OUTERR "mpxerr.t"
\r
3752 static void mpx_rename (MPX mpx, char *a, char *b) {
\r
3753 mpx_report(mpx,"renaming %s to %s",a,b);
\r
3764 static void mpx_default_erasetmp(MPX mpx) {
\r
3767 if (mpx->mode==mpx_tex_mode) {
\r
3768 wrk = xstrdup(mpx->tex);
\r
3769 p = strrchr(wrk, '.');
\r
3770 *p = '\0'; strcat(wrk, ".aux"); remove(wrk);
\r
3771 *p = '\0'; strcat(wrk, ".pdf"); remove(wrk);
\r
3772 *p = '\0'; strcat(wrk, ".toc"); remove(wrk);
\r
3773 *p = '\0'; strcat(wrk, ".idx"); remove(wrk);
\r
3774 *p = '\0'; strcat(wrk, ".ent"); remove(wrk);
\r
3775 *p = '\0'; strcat(wrk, ".out"); remove(wrk);
\r
3776 *p = '\0'; strcat(wrk, ".nav"); remove(wrk);
\r
3777 *p = '\0'; strcat(wrk, ".snm"); remove(wrk);
\r
3778 *p = '\0'; strcat(wrk, ".tui"); remove(wrk);
\r
3783 @ @<Declarations@>=
\r
3784 static void mpx_erasetmp(MPX mpx);
\r
3787 static void mpx_cleandir(MPX mpx, char *cur_path) {
\r
3790 struct _finddata_t c_file;
\r
3793 struct dirent *entry;
\r
3796 wrk = xstrdup(mpx->tex);
\r
3797 p = strrchr(wrk, '.');
\r
3798 *p = '\0'; /* now wrk is identical to tmpname */
\r
3801 strcat(cur_path,"/*");
\r
3802 if ((hFile = _findfirst (cur_path, &c_file)) == -1L) {
\r
3803 mpx_default_erasetmp(mpx);
\r
3805 if (strstr(c_file.name,wrk)==c_file.name)
\r
3806 remove(c_file.name);
\r
3807 while (_findnext (hFile, &c_file) != -1L) {
\r
3808 if (strstr(c_file.name,wrk)==c_file.name)
\r
3809 remove(c_file.name);
\r
3811 _findclose (hFile); /* no more entries => close directory */
\r
3814 if ((d = opendir(cur_path)) == NULL) {
\r
3815 mpx_default_erasetmp(mpx);
\r
3817 while ((entry = readdir (d)) != NULL) {
\r
3818 if (strstr(entry->d_name,wrk)==entry->d_name)
\r
3819 remove(entry->d_name);
\r
3828 @ It is important that |mpx_erasetmp| remains silent.
\r
3829 If it find trouble, it should just ignore it.
\r
3831 The string |cur_path| is a little bit larger than needed, because that
\r
3832 allows the win32 code in |cleandir| to add the slash and asterisk for
\r
3833 globbing without having to reallocate the variable first.
\r
3837 #define GETCWD _getcwd
\r
3839 #define GETCWD getcwd
\r
3841 static void mpx_erasetmp(MPX mpx) {
\r
3842 char cur_path[1024];
\r
3845 if (mpx->tex[0] != '\0') {
\r
3847 if(GETCWD(cur_path,1020) == NULL) {
\r
3848 mpx_default_erasetmp(mpx); /* don't know where we are */
\r
3850 mpx_cleandir(mpx,cur_path);
\r
3856 @* Running the external typesetters.
\r
3858 First, here is a helper for messaging.
\r
3861 static char *mpx_print_command (MPX mpx, int cmdlength, char **cmdline) {
\r
3866 for (i = 0; i < cmdlength ; i++) {
\r
3867 l += strlen(cmdline[i])+1;
\r
3869 s = xmalloc((size_t)l,1); t=s;
\r
3870 for (i = 0; i < cmdlength ; i++) {
\r
3871 if (i>0) *t++ = ' ';
\r
3872 t = strcpy(t,cmdline[i]);
\r
3873 t += strlen(cmdline[i]);
\r
3878 @ This function unifies the external program calling across Posix-like and Win32
\r
3882 static int do_spawn (MPX mpx, char *cmd, char **options) {
\r
3888 mpx_abort(mpx, "fork failed: %s", strerror(errno));
\r
3890 if(execvp(cmd, options))
\r
3891 mpx_abort(mpx, "exec failed: %s", strerror(errno));
\r
3893 if (wait(&retcode)==child) {
\r
3894 retcode = (WIFEXITED(retcode) ? WEXITSTATUS(retcode) : -1);
\r
3896 mpx_abort(mpx, "wait failed: %s", strerror(errno));
\r
3902 return spawnvp(P_WAIT, cmd, (const char **)options);
\r
3908 #define nuldev "nul"
\r
3910 #define nuldev "/dev/null"
\r
3912 static int mpx_run_command(MPX mpx, char *inname, char *outname, int count, char **cmdl) {
\r
3915 int sav_o, sav_i; /* for I/O redirection */
\r
3916 FILE *fr, *fw; /* read and write streams for the command */
\r
3918 if (count < 1 || cmdl == NULL || cmdl[0] == NULL)
\r
3919 return -1; /* return non-zero by default, signalling an error */
\r
3921 s = mpx_print_command(mpx,count, cmdl);
\r
3922 mpx_report(mpx,"running command %s", s);
\r
3925 fr = mpx_xfopen(mpx,(inname ? inname : nuldev), "r");
\r
3926 fw = mpx_xfopen(mpx,(outname ? outname : nuldev), "wb");
\r
3927 @<Save and redirect the standard I/O@>;
\r
3928 retcode = do_spawn(mpx,cmdl[0], cmdl);
\r
3929 @<Restore the standard I/O@>;
\r
3930 mpx_fclose(mpx,fr);
\r
3931 mpx_fclose(mpx,fw);
\r
3935 @ @ Running Troff is more likely than not a series of pipes that
\r
3936 feed input to each other. Makempx does all of this itself by using
\r
3937 temporary files inbetween. That means we have to juggle about with
\r
3938 |stdin| and |stdout|.
\r
3940 This is the only non-ansi C bit of makempx.
\r
3941 @^system dependencies@>
\r
3943 @<Save and redirect the standard I/O@>=
\r
3946 #define DUPP _dup2
\r
3951 sav_i = DUP(fileno(stdin));
\r
3952 sav_o = DUP(fileno(stdout));
\r
3953 DUPP(fileno(fr), fileno(stdin));
\r
3954 DUPP(fileno(fw), fileno(stdout))
\r
3956 @ @<Restore the standard I/O@>=
\r
3957 DUPP(sav_i, fileno(stdin));
\r
3959 DUPP(sav_o, fileno(stdout));
\r
3962 @ The allocation of the array pointed to by |cmdline_addr| is of
\r
3963 course much larger than is really needed, but it will still only be a
\r
3964 few hunderd bytes at the most, and this ensures that the separate
\r
3965 parts of the |maincmd| will all fit.
\r
3967 @d split_command(a,b) mpx_do_split_command(mpx,a,&b,' ')
\r
3968 @d split_pipes(a,b) mpx_do_split_command(mpx,a,&b,'|')
\r
3972 mpx_do_split_command(MPX mpx, char *maincmd, char ***cmdline_addr, char target) {
\r
3978 int in_string = 0;
\r
3979 if (strlen(maincmd) == 0)
\r
3981 i = sizeof(char *)*(strlen(maincmd)+1);
\r
3982 cmdline = xmalloc(i,1);
\r
3983 memset(cmdline,0,i);
\r
3984 *cmdline_addr = cmdline;
\r
3987 while (maincmd[i] == ' ')
\r
3989 cmd = xstrdup(maincmd);
\r
3991 for (; i <= strlen(maincmd); i++) {
\r
3992 if (in_string == 1) {
\r
3993 if (cmd[i] == '"') {
\r
3996 } else if (in_string == 2) {
\r
3997 if (cmd[i] == '\'') {
\r
4001 if (cmd[i] == '"') {
\r
4003 } else if (cmd[i] == '\'') {
\r
4005 } else if (cmd[i] == target) {
\r
4007 cmdline[ret++] = piece;
\r
4008 while (i < strlen(maincmd) && cmd[(i + 1)] == ' ')
\r
4010 piece = cmd + i + 1;
\r
4015 cmdline[ret++] = piece;
\r
4021 char *maincmd; /* TeX command name */
\r
4024 static void mpx_command_cleanup (MPX mpx, char **cmdline) {
\r
4026 xfree(cmdline[0]);
\r
4033 static void mpx_command_error (MPX mpx, int cmdlength, char **cmdline) {
\r
4034 char *s = mpx_print_command(mpx, cmdlength, cmdline);
\r
4035 mpx_command_cleanup(mpx, cmdline);
\r
4036 mpx_abort(mpx, "Command failed: %s; see mpxerr.log", s);
\r
4042 typedef struct mpx_options {
\r
4050 mpx_file_finder find_file;
\r
4052 int mpx_makempx (mpx_options *mpxopt) ;
\r
4057 @d ERRLOG "mpxerr.log"
\r
4058 @d MPXLOG "makempx.log"
\r
4061 int mpx_makempx (mpx_options *mpxopt) {
\r
4063 char **cmdline, **cmdbits;
\r
4066 char tmpname[] = "mpXXXXXX";
\r
4067 int cmdlength = 1;
\r
4068 int cmdbitlength = 1;
\r
4069 if (!mpxopt->debug) {
\r
4070 @<Check if mp file is newer than mpxfile, exit if not@>;
\r
4072 mpx = malloc(sizeof(struct mpx_data));
\r
4073 if (mpx==NULL || mpxopt->cmd==NULL || mpxopt->mpname==NULL || mpxopt->mpxname==NULL)
\r
4074 return mpx_fatal_error;
\r
4075 mpx_initialize(mpx);
\r
4076 if (mpxopt->banner!=NULL)
\r
4077 mpx->banner = mpxopt->banner;
\r
4078 mpx->mode = mpxopt->mode;
\r
4079 mpx->debug = mpxopt->debug;
\r
4080 if (mpxopt->find_file!=NULL)
\r
4081 mpx->find_file = mpxopt->find_file;
\r
4082 if (mpxopt->cmd!=NULL)
\r
4083 mpx->maincmd = xstrdup(mpxopt->cmd); /* valgrind says this leaks */
\r
4084 mpx->mpname = xstrdup(mpxopt->mpname);
\r
4085 mpx->mpxname = xstrdup(mpxopt->mpxname);
\r
4086 @<Install and test the non-local jump buffer@>;
\r
4089 mpx->errfile = stderr;
\r
4091 mpx->errfile = mpx_xfopen(mpx,MPXLOG, "wb");
\r
4093 mpx->progname = "makempx";
\r
4094 @<Initialize the |tmpname| variable@>;
\r
4095 if (mpxopt->mptexpre == NULL)
\r
4096 mpxopt->mptexpre = xstrdup("mptexpre.tex");
\r
4097 @<Run |mpto| on the mp file@>;
\r
4098 if (mpxopt->cmd==NULL)
\r
4100 if (mpx->mode == mpx_tex_mode) {
\r
4101 @<Run |TeX| and set up |infile| or abort@>;
\r
4102 if (mpx_dvitomp(mpx, infile)) {
\r
4103 mpx_rename(mpx, infile,DVIERR);
\r
4105 remove(mpx->mpxname);
\r
4106 mpx_abort(mpx, "Dvi conversion failed: %s %s\n",
\r
4107 DVIERR, mpx->mpxname);
\r
4109 } else if (mpx->mode == mpx_troff_mode) {
\r
4110 @<Run |Troff| and set up |infile| or abort@>;
\r
4111 if (mpx_dmp(mpx, infile)) {
\r
4112 mpx_rename(mpx,infile, TROFF_OUTERR);
\r
4113 mpx_rename(mpx,mpx->tex, TROFF_INERR);
\r
4115 remove(mpx->mpxname);
\r
4116 mpx_abort(mpx, "Troff conversion failed: %s %s\n",
\r
4117 TROFF_OUTERR, mpx->mpxname);
\r
4120 mpx_fclose(mpx,mpx->mpxfile);
\r
4122 mpx_fclose(mpx,mpx->errfile);
\r
4123 if (!mpx->debug) {
\r
4128 mpx_erasetmp(mpx);
\r
4130 retcode = mpx->history;
\r
4131 mpx_xfree(mpx->buf);
\r
4132 mpx_xfree(mpx->maincmd);
\r
4133 for (i = 0; i < (int)mpx->nfonts; i++)
\r
4134 mpx_xfree(mpx->font_name[i]);
\r
4136 if (retcode == mpx_cksum_trouble)
\r
4141 @ \TeX\ has to operate on an actual input file, so we have to append
\r
4142 that to the command line.
\r
4144 @<Run |TeX| and set ...@>=
\r
4147 mpx->maincmd = xrealloc(mpx->maincmd,strlen(mpx->maincmd)+strlen(mpx->tex)+2,1);
\r
4148 strcat(mpx->maincmd, " ");
\r
4149 strcat(mpx->maincmd, mpx->tex);
\r
4150 cmdlength = split_command(mpx->maincmd, cmdline);
\r
4152 retcode = mpx_run_command(mpx, NULL, NULL, cmdlength, cmdline);
\r
4154 TMPNAME_EXT(log, ".log");
\r
4156 TMPNAME_EXT(infile, ".dvi");
\r
4159 mpx_rename(mpx,mpx->tex, TEXERR);
\r
4160 mpx_rename(mpx,log, ERRLOG);
\r
4161 mpx_command_error(mpx, cmdlength, cmdline);
\r
4163 mpx_command_cleanup(mpx, cmdline);
\r
4166 @ @<Run |Troff| and set ...@>=
\r
4168 char *cur_in, *cur_out;
\r
4169 char tmp_a[15], tmp_b[15];
\r
4170 TMPNAME_EXT(tmp_a, ".t");
\r
4171 TMPNAME_EXT(tmp_b, ".tmp");
\r
4172 cur_in = mpx->tex;
\r
4175 /* split the command in bits */
\r
4176 cmdbitlength = split_pipes(mpx->maincmd, cmdbits);
\r
4178 for (i = 0; i < cmdbitlength; i++) {
\r
4179 if (cmdline!=NULL) free(cmdline);
\r
4180 cmdlength = split_command(cmdbits[i], cmdline);
\r
4181 retcode = mpx_run_command(mpx, cur_in, cur_out, cmdlength, cmdline);
\r
4184 mpx_rename(mpx,mpx->tex, TROFF_INERR);
\r
4185 mpx_command_error(mpx, cmdlength, cmdline);
\r
4187 if (i < cmdbitlength - 1) {
\r
4195 strcpy(infile,cur_in);
\r
4198 if (tmp_a!=infile) { remove(tmp_a); }
\r
4199 if (tmp_b!=infile) { remove(tmp_b); }
\r
4202 @ If MPX file is up-to-date or if MP file does not exist, do nothing.
\r
4204 @<Check if mp file is newer than mpxfile, exit if not@>=
\r
4205 if (mpx_newer(mpxopt->mpname, mpxopt->mpxname))
\r
4210 @<Initialize the |tmpname| variable@>=
\r
4211 #ifdef HAVE_MKSTEMP
\r
4212 i = mkstemp(tmpname);
\r
4214 sprintf(tmpname, "mp%06d", (int)(time(NULL) % 1000000));
\r
4220 #ifdef HAVE_MKTEMP
\r
4222 char *tmpstring = mktemp(tmpname);
\r
4223 if ((tmpstring == NULL) || strlen(tmpname) == 0) {
\r
4224 sprintf(tmpname, "mp%06d", (int)(time(NULL) % 1000000));
\r
4226 /* this should not really be needed, but better
\r
4227 safe than sorry. */
\r
4228 if (tmpstring != tmpname) {
\r
4229 i = strlen(tmpstring);
\r
4231 strncpy(tmpname, tmpstring, i);
\r
4236 sprintf(tmpname, "mp%06d", (int)(time(NULL) % 1000000));
\r