Correctly make quotes around `Lk' link-name argument. Noted by Aldis

[mandoc.git] / term.c

diff --git a/term.c b/term.c
index 3116bab4c56081768d76274c5ae37031d2318d1d..c0507cdab142bb9be4216def6a8a012b621d40f9 100644 (file)
--- a/term.c
+++ b/term.c
@@ -1,360 +1,705 @@
-/* $Id: term.c,v 1.1 2009/02/20 11:04:23 kristaps Exp $ */
+/*     $Id: term.c,v 1.166 2010/07/26 22:26:05 kristaps Exp $ */

 /*
 /*

- * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010 Ingo Schwarze <schwarze@openbsd.org>

  *
  * Permission to use, copy, modify, and distribute this software for any
  *
  * Permission to use, copy, modify, and distribute this software for any

- * purpose with or without fee is hereby granted, provided that the
- * above copyright notice and this permission notice appear in all
- * copies.
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.

  *
  *

- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
- * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
- * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
- * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
- * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
- * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

  */
  */

+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+

 #include <assert.h>
 #include <assert.h>

-#include <curses.h>
-#include <err.h>
-#include <stdlib.h>
+#include <ctype.h>
+#include <stdint.h>

 #include <stdio.h>
 #include <stdio.h>

+#include <stdlib.h>

 #include <string.h>
 #include <string.h>

-#include <term.h>
-#include <unistd.h>

 
 

-#include "mdoc.h"
+#include "mandoc.h"
+#include "chars.h"
+#include "out.h"
+#include "term.h"
+#include "main.h"
+
+static void              spec(struct termp *, enum roffdeco,
+                               const char *, size_t);
+static void              res(struct termp *, const char *, size_t);
+static void              bufferc(struct termp *, char);
+static void              adjbuf(struct termp *p, size_t);
+static void              encode(struct termp *, const char *, size_t);

 
 
 
 

-static int              termprint_r(size_t, size_t, 
-                               const struct mdoc_node *);
-static void             termprint_head(size_t, 
-                               const struct mdoc_meta *);
-static void             termprint_tail(size_t, 
-                               const struct mdoc_meta *);
+void
+term_free(struct termp *p)
+{

 
 

-static char            *arch2a(enum mdoc_arch);
-static char            *vol2a(enum mdoc_vol);
-static char            *msec2a(enum mdoc_msec);
+       if (p->buf)
+               free(p->buf);
+       if (p->symtab)
+               chars_free(p->symtab);

 
 

-static size_t           ttitle2a(char *, enum mdoc_vol, enum mdoc_msec,
-                               enum mdoc_arch, size_t);
+       free(p);
+}

 
 
 
 

-static char *
-arch2a(enum mdoc_arch arch)
+void
+term_begin(struct termp *p, term_margin head, 
+               term_margin foot, const void *arg)

 {
 
 {
 

-       switch (arch) {
-       case (ARCH_alpha):
-               return("Alpha");
-       case (ARCH_amd64):
-               return("AMD64");
-       case (ARCH_amiga):
-               return("Amiga");
-       case (ARCH_arc):
-               return("ARC");
-       case (ARCH_arm):
-               return("ARM");
-       case (ARCH_armish):
-               return("ARMISH");
-       case (ARCH_aviion):
-               return("AViion");
-       case (ARCH_hp300):
-               return("HP300");
-       case (ARCH_hppa):
-               return("HPPA");
-       case (ARCH_hppa64):
-               return("HPPA64");
-       case (ARCH_i386):
-               return("i386");
-       case (ARCH_landisk):
-               return("LANDISK");
-       case (ARCH_luna88k):
-               return("Luna88k");
-       case (ARCH_mac68k):
-               return("Mac68k");
-       case (ARCH_macppc):
-               return("MacPPC");
-       case (ARCH_mvme68k):
-               return("MVME68k");
-       case (ARCH_mvme88k):
-               return("MVME88k");
-       case (ARCH_mvmeppc):
-               return("MVMEPPC");
-       case (ARCH_pmax):
-               return("PMAX");
-       case (ARCH_sgi):
-               return("SGI");
-       case (ARCH_socppc):
-               return("SOCPPC");
-       case (ARCH_sparc):
-               return("SPARC");
-       case (ARCH_sparc64):
-               return("SPARC64");
-       case (ARCH_sun3):
-               return("Sun3");
-       case (ARCH_vax):
-               return("VAX");
-       case (ARCH_zaurus):
-               return("Zaurus");
-       default:                
-               break;
+       p->headf = head;
+       p->footf = foot;
+       p->argf = arg;
+       (*p->begin)(p);
+}
+
+
+void
+term_end(struct termp *p)
+{
+
+       (*p->end)(p);
+}
+
+
+struct termp *
+term_alloc(enum termenc enc)
+{
+       struct termp    *p;
+
+       p = calloc(1, sizeof(struct termp));
+       if (NULL == p) {
+               perror(NULL);
+               exit(EXIT_FAILURE);

        }
 
        }
 

-       return(NULL);
+       p->enc = enc;
+       return(p);

 }
 
 
 }
 
 

-static char *
-vol2a(enum mdoc_vol vol)
+/*
+ * Flush a line of text.  A "line" is loosely defined as being something
+ * that should be followed by a newline, regardless of whether it's
+ * broken apart by newlines getting there.  A line can also be a
+ * fragment of a columnar list (`Bl -tag' or `Bl -column'), which does
+ * not have a trailing newline.
+ *
+ * The following flags may be specified:
+ *
+ *  - TERMP_NOLPAD: when beginning to write the line, don't left-pad the
+ *    offset value.  This is useful when doing columnar lists where the
+ *    prior column has right-padded.
+ *
+ *  - TERMP_NOBREAK: this is the most important and is used when making
+ *    columns.  In short: don't print a newline and instead pad to the
+ *    right margin.  Used in conjunction with TERMP_NOLPAD.
+ *
+ *  - TERMP_TWOSPACE: when padding, make sure there are at least two
+ *    space characters of padding.  Otherwise, rather break the line.
+ *
+ *  - TERMP_DANGLE: don't newline when TERMP_NOBREAK is specified and
+ *    the line is overrun, and don't pad-right if it's underrun.
+ *
+ *  - TERMP_HANG: like TERMP_DANGLE, but doesn't newline when
+ *    overruning, instead save the position and continue at that point
+ *    when the next invocation.
+ *
+ *  In-line line breaking:
+ *
+ *  If TERMP_NOBREAK is specified and the line overruns the right
+ *  margin, it will break and pad-right to the right margin after
+ *  writing.  If maxrmargin is violated, it will break and continue
+ *  writing from the right-margin, which will lead to the above scenario
+ *  upon exit.  Otherwise, the line will break at the right margin.
+ */
+void
+term_flushln(struct termp *p)

 {
 {

+       int              i;     /* current input position in p->buf */
+       size_t           vis;   /* current visual position on output */
+       size_t           vbl;   /* number of blanks to prepend to output */
+       size_t           vend;  /* end of word visual position on output */
+       size_t           bp;    /* visual right border position */
+       int              j;     /* temporary loop index for p->buf */
+       int              jhy;   /* last hyph before overflow w/r/t j */
+       size_t           maxvis; /* output position of visible boundary */
+       size_t           mmax; /* used in calculating bp */
+
+       /*
+        * First, establish the maximum columns of "visible" content.
+        * This is usually the difference between the right-margin and
+        * an indentation, but can be, for tagged lists or columns, a
+        * small set of values. 
+        */
+
+       assert(p->offset < p->rmargin);
+
+       maxvis = (int)(p->rmargin - p->offset) - p->overstep < 0 ?
+               /* LINTED */ 
+               0 : p->rmargin - p->offset - p->overstep;
+       mmax = (int)(p->maxrmargin - p->offset) - p->overstep < 0 ?
+               /* LINTED */
+               0 : p->maxrmargin - p->offset - p->overstep;
+
+       bp = TERMP_NOBREAK & p->flags ? mmax : maxvis;
+
+       /*
+        * Indent the first line of a paragraph.
+        */
+       vbl = p->flags & TERMP_NOLPAD ? 0 : p->offset;
+
+       vis = vend = i = 0;
+
+       while (i < (int)p->col) {
+               /*
+                * Handle literal tab characters: collapse all
+                * subsequent tabs into a single huge set of spaces.
+                */
+               for (j = i; j < (int)p->col; j++) {
+                       if ('\t' != p->buf[j])
+                               break;
+                       vend = (vis / p->tabwidth + 1) * p->tabwidth;
+                       vbl += vend - vis;
+                       vis = vend;
+               }

 
 

-       switch (vol) {
-       case (VOL_AMD):
-               return("OpenBSD Ancestral Manual Documents");
-       case (VOL_IND):
-               return("OpenBSD Manual Master Index");
-       case (VOL_KM):
-               return("OpenBSD Kernel Manual");
-       case (VOL_LOCAL):
-               return("OpenBSD Local Manual");
-       case (VOL_PRM):
-               return("OpenBSD Programmer's Manual");
-       case (VOL_PS1):
-               return("OpenBSD Programmer's Supplementary Documents");
-       case (VOL_SMM):
-               return("OpenBSD System Manager's Manual");
-       case (VOL_URM):
-               return("OpenBSD Reference Manual");
-       case (VOL_USD):
-               return("OpenBSD User's Supplementary Documents");
-       default:
-               break;
+               /*
+                * Count up visible word characters.  Control sequences
+                * (starting with the CSI) aren't counted.  A space
+                * generates a non-printing word, which is valid (the
+                * space is printed according to regular spacing rules).
+                */
+
+               /* LINTED */
+               for (jhy = 0; j < (int)p->col; j++) {
+                       if ((j && ' ' == p->buf[j]) || '\t' == p->buf[j])
+                               break;
+
+                       /* Back over the the last printed character. */
+                       if (8 == p->buf[j]) {
+                               assert(j);
+                               vend -= (*p->width)(p, p->buf[j - 1]);
+                               continue;
+                       }
+
+                       /* Regular word. */
+                       /* Break at the hyphen point if we overrun. */
+                       if (vend > vis && vend < bp && 
+                                       ASCII_HYPH == p->buf[j])
+                               jhy = j;
+
+                       vend += (*p->width)(p, p->buf[j]);
+               }
+
+               /*
+                * Find out whether we would exceed the right margin.
+                * If so, break to the next line.
+                */
+               if (vend > bp && 0 == jhy && vis > 0) {
+                       vend -= vis;
+                       (*p->endline)(p);
+                       if (TERMP_NOBREAK & p->flags) {
+                               p->viscol = p->rmargin;
+                               (*p->advance)(p, p->rmargin);
+                               vend += p->rmargin - p->offset;
+                       } else {
+                               p->viscol = 0;
+                               vbl = p->offset;
+                       }
+
+                       /* Remove the p->overstep width. */
+
+                       bp += (int)/* LINTED */
+                               p->overstep;
+                       p->overstep = 0;
+               }
+
+               /*
+                * Skip leading tabs, they were handled above.
+                */
+               while (i < (int)p->col && '\t' == p->buf[i])
+                       i++;
+
+               /* Write out the [remaining] word. */
+               for ( ; i < (int)p->col; i++) {
+                       if (vend > bp && jhy > 0 && i > jhy)
+                               break;
+                       if ('\t' == p->buf[i])
+                               break;
+                       if (' ' == p->buf[i]) {
+                               j = i;
+                               while (' ' == p->buf[i])
+                                       i++;
+                               vbl += (i - j) * (*p->width)(p, ' ');
+                               break;
+                       }
+                       if (ASCII_NBRSP == p->buf[i]) {
+                               vbl += (*p->width)(p, ' ');
+                               continue;
+                       }
+
+                       /*
+                        * Now we definitely know there will be
+                        * printable characters to output,
+                        * so write preceding white space now.
+                        */
+                       if (vbl) {
+                               (*p->advance)(p, vbl);
+                               p->viscol += vbl;
+                               vbl = 0;
+                       }
+
+                       if (ASCII_HYPH == p->buf[i]) {
+                               (*p->letter)(p, '-');
+                               p->viscol += (*p->width)(p, '-');
+                       } else {
+                               (*p->letter)(p, p->buf[i]);
+                               p->viscol += (*p->width)(p, p->buf[i]);
+                       }
+               }
+               vend += vbl;
+               vis = vend;
+       }
+
+       p->col = 0;
+       p->overstep = 0;
+
+       if ( ! (TERMP_NOBREAK & p->flags)) {
+               p->viscol = 0;
+               (*p->endline)(p);
+               return;

        }
 
        }
 

-       return(NULL);
+       if (TERMP_HANG & p->flags) {
+               /* We need one blank after the tag. */
+               p->overstep = /* LINTED */
+                       vis - maxvis + (*p->width)(p, ' ');
+
+               /*
+                * Behave exactly the same way as groff:
+                * If we have overstepped the margin, temporarily move
+                * it to the right and flag the rest of the line to be
+                * shorter.
+                * If we landed right at the margin, be happy.
+                * If we are one step before the margin, temporarily
+                * move it one step LEFT and flag the rest of the line
+                * to be longer.
+                */
+               if (p->overstep >= -1) {
+                       assert((int)maxvis + p->overstep >= 0);
+                       /* LINTED */
+                       maxvis += p->overstep;
+               } else
+                       p->overstep = 0;
+
+       } else if (TERMP_DANGLE & p->flags)
+               return;
+
+       /* Right-pad. */
+       if (maxvis > vis + /* LINTED */
+                       ((TERMP_TWOSPACE & p->flags) ? 
+                        (*p->width)(p, ' ') : 0)) {
+               p->viscol += maxvis - vis;
+               (*p->advance)(p, maxvis - vis);
+               vis += (maxvis - vis);
+       } else {        /* ...or newline break. */
+               (*p->endline)(p);
+               p->viscol = p->rmargin;
+               (*p->advance)(p, p->rmargin);
+       }

 }
 
 
 }
 
 

-static char *
-msec2a(enum mdoc_msec msec)
+/* 
+ * A newline only breaks an existing line; it won't assert vertical
+ * space.  All data in the output buffer is flushed prior to the newline
+ * assertion.
+ */
+void
+term_newln(struct termp *p)

 {
 
 {
 

-       switch (msec) {
-       case(MSEC_1):
-               return("1");
-       case(MSEC_2):
-               return("2");
-       case(MSEC_3):
-               return("3");
-       case(MSEC_3f):
-               return("3f");
-       case(MSEC_3p):
-               return("3p");
-       case(MSEC_4):
-               return("4");
-       case(MSEC_5):
-               return("5");
-       case(MSEC_6):
-               return("6");
-       case(MSEC_7):
-               return("7");
-       case(MSEC_8):
-               return("8");
-       case(MSEC_9):
-               return("9");
-       case(MSEC_X11):
-               return("X11");
-       case(MSEC_X11R6):
-               return("X11R6");
-       case(MSEC_local):
-               return("local");
-       case(MSEC_n):
-               return("n");
-       case(MSEC_unass):
-               /* FALLTHROUGH */
-       case(MSEC_draft):
-               return("draft");
-       case(MSEC_paper):
-               return("paper");
-       default:
-               break;
+       p->flags |= TERMP_NOSPACE;
+       if (0 == p->col && 0 == p->viscol) {
+               p->flags &= ~TERMP_NOLPAD;
+               return;

        }
        }

-       return(NULL);
+       term_flushln(p);
+       p->flags &= ~TERMP_NOLPAD;
+}
+
+
+/*
+ * Asserts a vertical space (a full, empty line-break between lines).
+ * Note that if used twice, this will cause two blank spaces and so on.
+ * All data in the output buffer is flushed prior to the newline
+ * assertion.
+ */
+void
+term_vspace(struct termp *p)
+{
+
+       term_newln(p);
+       p->viscol = 0;
+       (*p->endline)(p);
+}
+
+
+static void
+spec(struct termp *p, enum roffdeco d, const char *word, size_t len)
+{
+       const char      *rhs;
+       size_t           sz;
+
+       rhs = chars_spec2str(p->symtab, word, len, &sz);
+       if (rhs) 
+               encode(p, rhs, sz);
+       else if (DECO_SSPECIAL == d)
+               encode(p, word, len);
+}
+
+
+static void
+res(struct termp *p, const char *word, size_t len)
+{
+       const char      *rhs;
+       size_t           sz;
+
+       rhs = chars_res2str(p->symtab, word, len, &sz);
+       if (rhs)
+               encode(p, rhs, sz);
+}
+
+
+void
+term_fontlast(struct termp *p)
+{
+       enum termfont    f;
+
+       f = p->fontl;
+       p->fontl = p->fontq[p->fonti];
+       p->fontq[p->fonti] = f;

 }
 
 
 }
 
 

-static size_t
-ttitle2a(char *dst, enum mdoc_vol vol, enum mdoc_msec msec,
-               enum mdoc_arch arch, size_t sz)
+void
+term_fontrepl(struct termp *p, enum termfont f)

 {
 {

-       char            *p;
+
+       p->fontl = p->fontq[p->fonti];
+       p->fontq[p->fonti] = f;
+}
+
+
+void
+term_fontpush(struct termp *p, enum termfont f)
+{
+
+       assert(p->fonti + 1 < 10);
+       p->fontl = p->fontq[p->fonti];
+       p->fontq[++p->fonti] = f;
+}
+
+
+const void *
+term_fontq(struct termp *p)
+{
+
+       return(&p->fontq[p->fonti]);
+}
+
+
+enum termfont
+term_fonttop(struct termp *p)
+{
+
+       return(p->fontq[p->fonti]);
+}
+
+
+void
+term_fontpopq(struct termp *p, const void *key)
+{
+
+       while (p->fonti >= 0 && key != &p->fontq[p->fonti])
+               p->fonti--;
+       assert(p->fonti >= 0);
+}
+
+
+void
+term_fontpop(struct termp *p)
+{
+
+       assert(p->fonti);
+       p->fonti--;
+}
+
+
+/*
+ * Handle pwords, partial words, which may be either a single word or a
+ * phrase that cannot be broken down (such as a literal string).  This
+ * handles word styling.
+ */
+void
+term_word(struct termp *p, const char *word)
+{
+       const char      *sv, *seq;
+       int              sz;

        size_t           ssz;
        size_t           ssz;

+       enum roffdeco    deco;
+
+       sv = word;

 
 

-       if (NULL == (p = vol2a(vol)))
-               switch (msec) {
-               case (MSEC_1):
+       if (word[0] && '\0' == word[1])
+               switch (word[0]) {
+               case('.'):

                        /* FALLTHROUGH */
                        /* FALLTHROUGH */

-               case (MSEC_6):
+               case(','):

                        /* FALLTHROUGH */
                        /* FALLTHROUGH */

-               case (MSEC_7):
-                       p = vol2a(VOL_URM);
-                       break;
-               case (MSEC_8):
-                       p = vol2a(VOL_SMM);
-                       break;
-               case (MSEC_2):
+               case(';'):

                        /* FALLTHROUGH */
                        /* FALLTHROUGH */

-               case (MSEC_3):
+               case(':'):

                        /* FALLTHROUGH */
                        /* FALLTHROUGH */

-               case (MSEC_4):
+               case('?'):

                        /* FALLTHROUGH */
                        /* FALLTHROUGH */

-               case (MSEC_5):
-                       p = vol2a(VOL_PRM);
-                       break;
-               case (MSEC_9):
-                       p = vol2a(VOL_KM);
+               case('!'):
+                       /* FALLTHROUGH */
+               case(')'):
+                       /* FALLTHROUGH */
+               case(']'):
+                       if ( ! (TERMP_IGNDELIM & p->flags))
+                               p->flags |= TERMP_NOSPACE;

                        break;
                default:
                        break;
                default:

-                       /* FIXME: capitalise. */
-                       if (NULL == (p = msec2a(msec)))
-                               p = msec2a(MSEC_local);

                        break;
                }
                        break;
                }

-       assert(p);
-
-       if ((ssz = strlcpy(dst, p, sz)) >= sz)
-               return(ssz);
-
-       if ((p = arch2a(arch))) {
-               if ((ssz = strlcat(dst, " (", sz)) >= sz)
-                       return(ssz);
-               if ((ssz = strlcat(dst, p, sz)) >= sz)
-                       return(ssz);
-               if ((ssz = strlcat(dst, ")", sz)) >= sz)
-                       return(ssz);
+
+       if ( ! (TERMP_NOSPACE & p->flags)) {
+               if ( ! (TERMP_KEEP & p->flags)) {
+                       if (TERMP_PREKEEP & p->flags)
+                               p->flags |= TERMP_KEEP;
+                       bufferc(p, ' ');
+                       if (TERMP_SENTENCE & p->flags)
+                               bufferc(p, ' ');
+               } else
+                       bufferc(p, ASCII_NBRSP);

        }
 
        }
 

-       return(ssz);
-}
+       if ( ! (p->flags & TERMP_NONOSPACE))
+               p->flags &= ~TERMP_NOSPACE;
+       else
+               p->flags |= TERMP_NOSPACE;

 
 

+       p->flags &= ~TERMP_SENTENCE;

 
 

-static int
-termprint_r(size_t cols, size_t indent, const struct mdoc_node *node)
-{
+       while (*word) {
+               if ((ssz = strcspn(word, "\\")) > 0)
+                       encode(p, word, ssz);
+
+               word += ssz;
+               if ('\\' != *word)
+                       continue;
+
+               seq = ++word;
+               sz = a2roffdeco(&deco, &seq, &ssz);
+
+               switch (deco) {
+               case (DECO_RESERVED):
+                       res(p, seq, ssz);
+                       break;
+               case (DECO_SPECIAL):
+                       /* FALLTHROUGH */
+               case (DECO_SSPECIAL):
+                       spec(p, deco, seq, ssz);
+                       break;
+               case (DECO_BOLD):
+                       term_fontrepl(p, TERMFONT_BOLD);
+                       break;
+               case (DECO_ITALIC):
+                       term_fontrepl(p, TERMFONT_UNDER);
+                       break;
+               case (DECO_ROMAN):
+                       term_fontrepl(p, TERMFONT_NONE);
+                       break;
+               case (DECO_PREVIOUS):
+                       term_fontlast(p);
+                       break;
+               default:
+                       break;
+               }

 
 

-       return(1);
+               word += sz;
+               if (DECO_NOSPACE == deco && '\0' == *word)
+                       p->flags |= TERMP_NOSPACE;
+       }
+
+       /* 
+        * Note that we don't process the pipe: the parser sees it as
+        * punctuation, but we don't in terms of typography.
+        */
+       if (sv[0] && '\0' == sv[1])
+               switch (sv[0]) {
+               case('('):
+                       /* FALLTHROUGH */
+               case('['):
+                       p->flags |= TERMP_NOSPACE;
+                       break;
+               default:
+                       break;
+               }

 }
 
 
 static void
 }
 
 
 static void

-termprint_tail(size_t cols, const struct mdoc_meta *meta)
+adjbuf(struct termp *p, size_t sz)

 {
 {

-       struct tm       *tm;
-       char            *buf, *os;
-       size_t           sz, osz, ssz, i;
-
-       if (NULL == (buf = malloc(cols)))
-               err(1, "malloc");
-       if (NULL == (os = malloc(cols)))
-               err(1, "malloc");

 
 

-       tm = localtime(&meta->date);
-       if (NULL == strftime(buf, cols, "%B %d, %Y", tm))
-               err(1, "strftime");
+       if (0 == p->maxcols)
+               p->maxcols = 1024;
+       while (sz >= p->maxcols)
+               p->maxcols <<= 2;

 
 

-       osz = strlcpy(os, meta->os, cols);
-
-       sz = strlen(buf);
-       ssz = sz + osz + 1;
+       p->buf = realloc(p->buf, p->maxcols);
+       if (NULL == p->buf) {
+               perror(NULL);
+               exit(EXIT_FAILURE);
+       }
+}

 
 

-       if (ssz > cols) {
-               ssz -= cols;
-               assert(ssz <= osz);
-               os[osz - ssz] = 0;
-               ssz = 1;
-       } else
-               ssz = cols - ssz + 1;

 
 

-       printf("%s", os);
-       for (i = 0; i < ssz; i++)
-               printf(" ");
+static void
+bufferc(struct termp *p, char c)
+{

 
 

-       printf("%s\n", buf);
+       if (p->col + 1 >= p->maxcols)
+               adjbuf(p, p->col + 1);

 
 

-       free(buf);
-       free(os);
+       p->buf[(int)p->col++] = c;

 }
 
 
 static void
 }
 
 
 static void

-termprint_head(size_t cols, const struct mdoc_meta *meta)
+encode(struct termp *p, const char *word, size_t sz)

 {
 {

-       char            *msec, *buf, *title;
-       size_t           ssz, tsz, ttsz, i;
+       enum termfont     f;
+       int               i;
+
+       /*
+        * Encode and buffer a string of characters.  If the current
+        * font mode is unset, buffer directly, else encode then buffer
+        * character by character.
+        */
+
+       if (TERMFONT_NONE == (f = term_fonttop(p))) {
+               if (p->col + sz >= p->maxcols) 
+                       adjbuf(p, p->col + sz);
+               memcpy(&p->buf[(int)p->col], word, sz);
+               p->col += sz;
+               return;
+       }

 
 

-       if (NULL == (buf = malloc(cols)))
-               err(1, "malloc");
-       if (NULL == (title = malloc(cols)))
-               err(1, "malloc");
+       /* Pre-buffer, assuming worst-case. */

 
 

-       /* Format the manual page header. */
+       if (p->col + 1 + (sz * 3) >= p->maxcols)
+               adjbuf(p, p->col + 1 + (sz * 3));

 
 

-       tsz = ttitle2a(buf, meta->vol, meta->msec, meta->arch, cols);
-       ttsz = strlcpy(title, meta->title, cols);
+       for (i = 0; i < (int)sz; i++) {
+               if ( ! isgraph((u_char)word[i])) {
+                       p->buf[(int)p->col++] = word[i];
+                       continue;
+               }

 
 

-       if (NULL == (msec = msec2a(meta->msec)))
-               msec = "";
+               if (TERMFONT_UNDER == f)
+                       p->buf[(int)p->col++] = '_';
+               else
+                       p->buf[(int)p->col++] = word[i];

 
 

-       ssz = (2 * (ttsz + 2 + strlen(msec))) + tsz + 2;
+               p->buf[(int)p->col++] = 8;
+               p->buf[(int)p->col++] = word[i];
+       }
+}

 
 

-       if (ssz > cols) {
-               if ((ssz -= cols) % 2)
-                       ssz++;
-               ssz /= 2;
-       
-               assert(ssz <= ttsz);
-               title[ttsz - ssz] = 0;
-               ssz = 1;
-       } else
-               ssz = ((cols - ssz) / 2) + 1;

 
 

-       printf("%s(%s)", title, msec);
+size_t
+term_len(const struct termp *p, size_t sz)
+{

 
 

-       for (i = 0; i < ssz; i++)
-               printf(" ");
+       return((*p->width)(p, ' ') * sz);
+}

 
 

-       printf("%s", buf);

 
 

-       for (i = 0; i < ssz; i++)
-               printf(" ");
+size_t
+term_strlen(const struct termp *p, const char *cp)
+{
+       size_t           sz;

 
 

-       printf("%s(%s)\n\n", title, msec);
+       for (sz = 0; *cp; cp++)
+               sz += (*p->width)(p, *cp);

 
 

-       free(title);
-       free(buf);
+       return(sz);

 }
 
 
 }
 
 

-int
-termprint(const struct mdoc_node *node,
-               const struct mdoc_meta *meta)
+/* ARGSUSED */
+size_t
+term_vspan(const struct termp *p, const struct roffsu *su)

 {
 {

-       size_t           cols;
-
-       if (ERR == setupterm(NULL, STDOUT_FILENO, NULL))
-               return(0);
+       double           r;

 
 

-       cols = columns < 60 ? 60 : (size_t)columns;
+       switch (su->unit) {
+       case (SCALE_CM):
+               r = su->scale * 2;
+               break;
+       case (SCALE_IN):
+               r = su->scale * 6;
+               break;
+       case (SCALE_PC):
+               r = su->scale;
+               break;
+       case (SCALE_PT):
+               r = su->scale / 8;
+               break;
+       case (SCALE_MM):
+               r = su->scale / 1000;
+               break;
+       case (SCALE_VS):
+               r = su->scale;
+               break;
+       default:
+               r = su->scale - 1;
+               break;
+       }

 
 

-       termprint_head(cols, meta);
-       if ( ! termprint_r(cols, 0, node))
-               return(0);
-       termprint_tail(cols, meta);
-       return(1);
+       if (r < 0.0)
+               r = 0.0;
+       return(/* LINTED */(size_t)
+                       r);

 }
 
 
 }
 
 

+size_t
+term_hspan(const struct termp *p, const struct roffsu *su)
+{
+       double           v;
+
+       v = ((*p->hspan)(p, su));
+       if (v < 0.0)
+               v = 0.0;
+       return((size_t) /* LINTED */
+                       v);
+}