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Remove the ENDBODY_NOSPACE flag, simplifying the code.
[mandoc.git] / term_ps.c
diff --git a/term_ps.c b/term_ps.c
index e8bcde82ba847930e7e1c3d26b4dadf0257bf0a0..286a89f91a61431b040b6628e0070ad237a2751a 100644 (file)
--- a/term_ps.c
+++ b/term_ps.c
@@ -1,50 +1,50 @@
-/*     $Id: term_ps.c,v 1.58 2014/03/30 21:28:01 schwarze Exp $ */
+/*     $Id: term_ps.c,v 1.82 2016/08/10 11:03:43 schwarze Exp $ */
 /*
  * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 /*
  * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2014, 2015, 2016 Ingo Schwarze <schwarze@openbsd.org>
  *
  * 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.
  *
  *
  * 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.
  *
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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.
  */
  * 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"
 #include "config.h"
-#endif
 
 #include <sys/types.h>
 
 #include <assert.h>
 
 #include <sys/types.h>
 
 #include <assert.h>
+#if HAVE_ERR
+#include <err.h>
+#endif
 #include <stdarg.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdarg.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <time.h>
 #include <unistd.h>
 
 #include <unistd.h>
 
-#include "mandoc.h"
 #include "mandoc_aux.h"
 #include "out.h"
 #include "mandoc_aux.h"
 #include "out.h"
-#include "main.h"
 #include "term.h"
 #include "term.h"
+#include "manconf.h"
+#include "main.h"
 
 /* These work the buffer used by the header and footer. */
 #define        PS_BUFSLOP        128
 
 /* Convert PostScript point "x" to an AFM unit. */
 
 /* These work the buffer used by the header and footer. */
 #define        PS_BUFSLOP        128
 
 /* Convert PostScript point "x" to an AFM unit. */
-#define        PNT2AFM(p, x) /* LINTED */ \
+#define        PNT2AFM(p, x) \
        (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
 
 /* Convert an AFM unit "x" to a PostScript points */
        (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
 
 /* Convert an AFM unit "x" to a PostScript points */
-#define        AFM2PNT(p, x) /* LINTED */ \
+#define        AFM2PNT(p, x) \
        ((double)(x) / (1000.0 / (double)(p)->ps->scale))
 
 struct glyph {
        ((double)(x) / (1000.0 / (double)(p)->ps->scale))
 
 struct glyph {
@@ -62,13 +62,16 @@ struct      termp_ps {
 #define        PS_INLINE        (1 << 0)       /* we're in a word */
 #define        PS_MARGINS       (1 << 1)       /* we're in the margins */
 #define        PS_NEWPAGE       (1 << 2)       /* new page, no words yet */
 #define        PS_INLINE        (1 << 0)       /* we're in a word */
 #define        PS_MARGINS       (1 << 1)       /* we're in the margins */
 #define        PS_NEWPAGE       (1 << 2)       /* new page, no words yet */
+#define        PS_BACKSP        (1 << 3)       /* last character was backspace */
        size_t            pscol;        /* visible column (AFM units) */
        size_t            pscol;        /* visible column (AFM units) */
+       size_t            pscolnext;    /* used for overstrike */
        size_t            psrow;        /* visible row (AFM units) */
        char             *psmarg;       /* margin buf */
        size_t            psmargsz;     /* margin buf size */
        size_t            psmargcur;    /* cur index in margin buf */
        size_t            psrow;        /* visible row (AFM units) */
        char             *psmarg;       /* margin buf */
        size_t            psmargsz;     /* margin buf size */
        size_t            psmargcur;    /* cur index in margin buf */
-       char              last;         /* character buffer */
+       char              last;         /* last non-backspace seen */
        enum termfont     lastf;        /* last set font */
        enum termfont     lastf;        /* last set font */
+       enum termfont     nextf;        /* building next font here */
        size_t            scale;        /* font scaling factor */
        size_t            pages;        /* number of pages shown */
        size_t            lineheight;   /* line height (AFM units) */
        size_t            scale;        /* font scaling factor */
        size_t            pages;        /* number of pages shown */
        size_t            lineheight;   /* line height (AFM units) */
@@ -80,14 +83,14 @@ struct      termp_ps {
        size_t            left;         /* body left (AFM units) */
        size_t            header;       /* header pos (AFM units) */
        size_t            footer;       /* footer pos (AFM units) */
        size_t            left;         /* body left (AFM units) */
        size_t            header;       /* header pos (AFM units) */
        size_t            footer;       /* footer pos (AFM units) */
-       size_t            pdfbytes;     /* current output byte */
+       size_t            pdfbytes;     /* current output byte */
        size_t            pdflastpg;    /* byte of last page mark */
        size_t            pdfbody;      /* start of body object */
        size_t           *pdfobjs;      /* table of object offsets */
        size_t            pdfobjsz;     /* size of pdfobjs */
 };
 
        size_t            pdflastpg;    /* byte of last page mark */
        size_t            pdfbody;      /* start of body object */
        size_t           *pdfobjs;      /* table of object offsets */
        size_t            pdfobjsz;     /* size of pdfobjs */
 };
 
-static double            ps_hspan(const struct termp *,
+static int               ps_hspan(const struct termp *,
                                const struct roffsu *);
 static size_t            ps_width(const struct termp *, int);
 static void              ps_advance(struct termp *, size_t);
                                const struct roffsu *);
 static size_t            ps_width(const struct termp *, int);
 static void              ps_advance(struct termp *, size_t);
@@ -95,19 +98,17 @@ static      void              ps_begin(struct termp *);
 static void              ps_closepage(struct termp *);
 static void              ps_end(struct termp *);
 static void              ps_endline(struct termp *);
 static void              ps_closepage(struct termp *);
 static void              ps_end(struct termp *);
 static void              ps_endline(struct termp *);
-static void              ps_fclose(struct termp *);
 static void              ps_growbuf(struct termp *, size_t);
 static void              ps_letter(struct termp *, int);
 static void              ps_pclose(struct termp *);
 static void              ps_growbuf(struct termp *, size_t);
 static void              ps_letter(struct termp *, int);
 static void              ps_pclose(struct termp *);
+static void              ps_plast(struct termp *);
 static void              ps_pletter(struct termp *, int);
 static void              ps_pletter(struct termp *, int);
-#if __GNUC__ - 0 >= 4
-__attribute__((__format__ (__printf__, 2, 3)))
-#endif
-static void              ps_printf(struct termp *, const char *, ...);
+static void              ps_printf(struct termp *, const char *, ...)
+                               __attribute__((__format__ (printf, 2, 3)));
 static void              ps_putchar(struct termp *, char);
 static void              ps_setfont(struct termp *, enum termfont);
 static void              ps_putchar(struct termp *, char);
 static void              ps_setfont(struct termp *, enum termfont);
-static void              ps_setwidth(struct termp *, int, size_t);
-static struct termp     *pspdf_alloc(char *);
+static void              ps_setwidth(struct termp *, int, int);
+static struct termp     *pspdf_alloc(const struct manoutput *);
 static void              pdf_obj(struct termp *, size_t);
 
 /*
 static void              pdf_obj(struct termp *, size_t);
 
 /*
@@ -408,42 +409,140 @@ static   const struct font fonts[TERMFONT__MAX] = {
                {  400 },
                {  541 },
        } },
                {  400 },
                {  541 },
        } },
+       { "Times-BoldItalic", {
+               {  250 },
+               {  389 },
+               {  555 },
+               {  500 },
+               {  500 },
+               {  833 },
+               {  778 },
+               {  333 },
+               {  333 },
+               {  333 },
+               {  500 },
+               {  570 },
+               {  250 },
+               {  333 },
+               {  250 },
+               {  278 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  333 },
+               {  333 },
+               {  570 },
+               {  570 },
+               {  570 },
+               {  500 },
+               {  832 },
+               {  667 },
+               {  667 },
+               {  667 },
+               {  722 },
+               {  667 },
+               {  667 },
+               {  722 },
+               {  778 },
+               {  389 },
+               {  500 },
+               {  667 },
+               {  611 },
+               {  889 },
+               {  722 },
+               {  722 },
+               {  611 },
+               {  722 },
+               {  667 },
+               {  556 },
+               {  611 },
+               {  722 },
+               {  667 },
+               {  889 },
+               {  667 },
+               {  611 },
+               {  611 },
+               {  333 },
+               {  278 },
+               {  333 },
+               {  570 },
+               {  500 },
+               {  333 },
+               {  500 },
+               {  500 },
+               {  444 },
+               {  500 },
+               {  444 },
+               {  333 },
+               {  500 },
+               {  556 },
+               {  278 },
+               {  278 },
+               {  500 },
+               {  278 },
+               {  778 },
+               {  556 },
+               {  500 },
+               {  500 },
+               {  500 },
+               {  389 },
+               {  389 },
+               {  278 },
+               {  556 },
+               {  444 },
+               {  667 },
+               {  500 },
+               {  444 },
+               {  389 },
+               {  348 },
+               {  220 },
+               {  348 },
+               {  570 },
+       } },
 };
 
 void *
 };
 
 void *
-pdf_alloc(char *outopts)
+pdf_alloc(const struct manoutput *outopts)
 {
        struct termp    *p;
 
        if (NULL != (p = pspdf_alloc(outopts)))
                p->type = TERMTYPE_PDF;
 
 {
        struct termp    *p;
 
        if (NULL != (p = pspdf_alloc(outopts)))
                p->type = TERMTYPE_PDF;
 
-       return(p);
+       return p;
 }
 
 void *
 }
 
 void *
-ps_alloc(char *outopts)
+ps_alloc(const struct manoutput *outopts)
 {
        struct termp    *p;
 
        if (NULL != (p = pspdf_alloc(outopts)))
                p->type = TERMTYPE_PS;
 
 {
        struct termp    *p;
 
        if (NULL != (p = pspdf_alloc(outopts)))
                p->type = TERMTYPE_PS;
 
-       return(p);
+       return p;
 }
 
 static struct termp *
 }
 
 static struct termp *
-pspdf_alloc(char *outopts)
+pspdf_alloc(const struct manoutput *outopts)
 {
        struct termp    *p;
        unsigned int     pagex, pagey;
        size_t           marginx, marginy, lineheight;
 {
        struct termp    *p;
        unsigned int     pagex, pagey;
        size_t           marginx, marginy, lineheight;
-       const char      *toks[2];
        const char      *pp;
        const char      *pp;
-       char            *v;
 
        p = mandoc_calloc(1, sizeof(struct termp));
        p->enc = TERMENC_ASCII;
 
        p = mandoc_calloc(1, sizeof(struct termp));
        p->enc = TERMENC_ASCII;
+       p->fontq = mandoc_reallocarray(NULL,
+           (p->fontsz = 8), sizeof(enum termfont));
+       p->fontq[0] = p->fontl = TERMFONT_NONE;
        p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
 
        p->advance = ps_advance;
        p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
 
        p->advance = ps_advance;
@@ -454,20 +553,6 @@ pspdf_alloc(char *outopts)
        p->letter = ps_letter;
        p->setwidth = ps_setwidth;
        p->width = ps_width;
        p->letter = ps_letter;
        p->setwidth = ps_setwidth;
        p->width = ps_width;
-       
-       toks[0] = "paper";
-       toks[1] = NULL;
-
-       pp = NULL;
-
-       while (outopts && *outopts)
-               switch (getsubopt(&outopts, UNCONST(toks), &v)) {
-               case (0):
-                       pp = v;
-                       break;
-               default:
-                       break;
-               }
 
        /* Default to US letter (millimetres). */
 
 
        /* Default to US letter (millimetres). */
 
@@ -481,6 +566,7 @@ pspdf_alloc(char *outopts)
         * only happens once, I'm not terribly concerned.
         */
 
         * only happens once, I'm not terribly concerned.
         */
 
+       pp = outopts->paper;
        if (pp && strcasecmp(pp, "letter")) {
                if (0 == strcasecmp(pp, "a3")) {
                        pagex = 297;
        if (pp && strcasecmp(pp, "letter")) {
                if (0 == strcasecmp(pp, "a3")) {
                        pagex = 297;
@@ -495,10 +581,10 @@ pspdf_alloc(char *outopts)
                        pagex = 216;
                        pagey = 356;
                } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
                        pagex = 216;
                        pagey = 356;
                } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
-                       fprintf(stderr, "%s: Unknown paper\n", pp);
+                       warnx("%s: Unknown paper", pp);
        }
 
        }
 
-       /* 
+       /*
         * This MUST be defined before any PNT2AFM or AFM2PNT
         * calculations occur.
         */
         * This MUST be defined before any PNT2AFM or AFM2PNT
         * calculations occur.
         */
@@ -512,10 +598,8 @@ pspdf_alloc(char *outopts)
 
        /* Margins are 1/9 the page x and y. */
 
 
        /* Margins are 1/9 the page x and y. */
 
-       marginx = /* LINTED */
-               (size_t)((double)pagex / 9.0);
-       marginy = /* LINTED */
-               (size_t)((double)pagey / 9.0);
+       marginx = (size_t)((double)pagex / 9.0);
+       marginy = (size_t)((double)pagey / 9.0);
 
        /* Line-height is 1.4em. */
 
 
        /* Line-height is 1.4em. */
 
@@ -531,26 +615,26 @@ pspdf_alloc(char *outopts)
        p->ps->lineheight = lineheight;
 
        p->defrmargin = pagex - (marginx * 2);
        p->ps->lineheight = lineheight;
 
        p->defrmargin = pagex - (marginx * 2);
-       return(p);
+       return p;
 }
 
 }
 
-
 static void
 static void
-ps_setwidth(struct termp *p, int iop, size_t width)
+ps_setwidth(struct termp *p, int iop, int width)
 {
        size_t   lastwidth;
 
        lastwidth = p->ps->width;
 {
        size_t   lastwidth;
 
        lastwidth = p->ps->width;
-       if (0 < iop)
+       if (iop > 0)
                p->ps->width += width;
                p->ps->width += width;
-       else if (0 > iop)
+       else if (iop == 0)
+               p->ps->width = width ? (size_t)width : p->ps->lastwidth;
+       else if (p->ps->width > (size_t)width)
                p->ps->width -= width;
        else
                p->ps->width -= width;
        else
-               p->ps->width = width ? width : p->ps->lastwidth;
+               p->ps->width = 0;
        p->ps->lastwidth = lastwidth;
 }
 
        p->ps->lastwidth = lastwidth;
 }
 
-
 void
 pspdf_free(void *arg)
 {
 void
 pspdf_free(void *arg)
 {
@@ -558,16 +642,13 @@ pspdf_free(void *arg)
 
        p = (struct termp *)arg;
 
 
        p = (struct termp *)arg;
 
-       if (p->ps->psmarg)
-               free(p->ps->psmarg);
-       if (p->ps->pdfobjs)
-               free(p->ps->pdfobjs);
+       free(p->ps->psmarg);
+       free(p->ps->pdfobjs);
 
        free(p->ps);
        term_free(p);
 }
 
 
        free(p->ps);
        term_free(p);
 }
 
-
 static void
 ps_printf(struct termp *p, const char *fmt, ...)
 {
 static void
 ps_printf(struct termp *p, const char *fmt, ...)
 {
@@ -585,12 +666,11 @@ ps_printf(struct termp *p, const char *fmt, ...)
        if ( ! (PS_MARGINS & p->ps->flags)) {
                len = vprintf(fmt, ap);
                va_end(ap);
        if ( ! (PS_MARGINS & p->ps->flags)) {
                len = vprintf(fmt, ap);
                va_end(ap);
-               p->ps->pdfbytes += /* LINTED */
-                       len < 0 ? 0 : (size_t)len;
+               p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
                return;
        }
 
                return;
        }
 
-       /* 
+       /*
         * XXX: I assume that the in-margin print won't exceed
         * PS_BUFSLOP (128 bytes), which is reasonable but still an
         * assumption that will cause pukeage if it's not the case.
         * XXX: I assume that the in-margin print won't exceed
         * PS_BUFSLOP (128 bytes), which is reasonable but still an
         * assumption that will cause pukeage if it's not the case.
@@ -606,7 +686,6 @@ ps_printf(struct termp *p, const char *fmt, ...)
        p->ps->psmargcur = strlen(p->ps->psmarg);
 }
 
        p->ps->psmargcur = strlen(p->ps->psmarg);
 }
 
-
 static void
 ps_putchar(struct termp *p, char c)
 {
 static void
 ps_putchar(struct termp *p, char c)
 {
@@ -615,7 +694,6 @@ ps_putchar(struct termp *p, char c)
        /* See ps_printf(). */
 
        if ( ! (PS_MARGINS & p->ps->flags)) {
        /* See ps_printf(). */
 
        if ( ! (PS_MARGINS & p->ps->flags)) {
-               /* LINTED */
                putchar(c);
                p->ps->pdfbytes++;
                return;
                putchar(c);
                p->ps->pdfbytes++;
                return;
@@ -628,7 +706,6 @@ ps_putchar(struct termp *p, char c)
        p->ps->psmarg[pos] = '\0';
 }
 
        p->ps->psmarg[pos] = '\0';
 }
 
-
 static void
 pdf_obj(struct termp *p, size_t obj)
 {
 static void
 pdf_obj(struct termp *p, size_t obj)
 {
@@ -637,20 +714,14 @@ pdf_obj(struct termp *p, size_t obj)
 
        if ((obj - 1) >= p->ps->pdfobjsz) {
                p->ps->pdfobjsz = obj + 128;
 
        if ((obj - 1) >= p->ps->pdfobjsz) {
                p->ps->pdfobjsz = obj + 128;
-               p->ps->pdfobjs = realloc
-                       (p->ps->pdfobjs, 
-                        p->ps->pdfobjsz * sizeof(size_t));
-               if (NULL == p->ps->pdfobjs) {
-                       perror(NULL);
-                       exit((int)MANDOCLEVEL_SYSERR);
-               }
+               p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
+                   p->ps->pdfobjsz, sizeof(size_t));
        }
 
        p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
        ps_printf(p, "%zu 0 obj\n", obj);
 }
 
        }
 
        p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
        ps_printf(p, "%zu 0 obj\n", obj);
 }
 
-
 static void
 ps_closepage(struct termp *p)
 {
 static void
 ps_closepage(struct termp *p)
 {
@@ -683,7 +754,7 @@ ps_closepage(struct termp *p)
                pdf_obj(p, base + 2);
                ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
                ps_printf(p, "/Font <<\n");
                pdf_obj(p, base + 2);
                ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
                ps_printf(p, "/Font <<\n");
-               for (i = 0; i < (int)TERMFONT__MAX; i++) 
+               for (i = 0; i < (int)TERMFONT__MAX; i++)
                        ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
                ps_printf(p, ">>\n>>\n");
 
                        ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
                ps_printf(p, ">>\n>>\n");
 
@@ -704,13 +775,14 @@ ps_closepage(struct termp *p)
        p->ps->flags |= PS_NEWPAGE;
 }
 
        p->ps->flags |= PS_NEWPAGE;
 }
 
-
-/* ARGSUSED */
 static void
 ps_end(struct termp *p)
 {
        size_t           i, xref, base;
 
 static void
 ps_end(struct termp *p)
 {
        size_t           i, xref, base;
 
+       ps_plast(p);
+       ps_pclose(p);
+
        /*
         * At the end of the file, do one last showpage.  This is the
         * same behaviour as groff(1) and works for multiple pages as
        /*
         * At the end of the file, do one last showpage.  This is the
         * same behaviour as groff(1) and works for multiple pages as
@@ -728,7 +800,7 @@ ps_end(struct termp *p)
                ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
                ps_printf(p, "%%%%EOF\n");
                return;
                ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
                ps_printf(p, "%%%%EOF\n");
                return;
-       } 
+       }
 
        pdf_obj(p, 2);
        ps_printf(p, "<<\n/Type /Pages\n");
 
        pdf_obj(p, 2);
        ps_printf(p, "<<\n/Type /Pages\n");
@@ -740,11 +812,9 @@ ps_end(struct termp *p)
        ps_printf(p, "/Kids [");
 
        for (i = 0; i < p->ps->pages; i++)
        ps_printf(p, "/Kids [");
 
        for (i = 0; i < p->ps->pages; i++)
-               ps_printf(p, " %zu 0 R", i * 4 +
-                               p->ps->pdfbody + 3);
+               ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
 
 
-       base = (p->ps->pages - 1) * 4 + 
-               p->ps->pdfbody + 4;
+       base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
 
        ps_printf(p, "]\n>>\nendobj\n");
        pdf_obj(p, base);
 
        ps_printf(p, "]\n>>\nendobj\n");
        pdf_obj(p, base);
@@ -758,8 +828,8 @@ ps_end(struct termp *p)
        ps_printf(p, "0000000000 65535 f \n");
 
        for (i = 0; i < base; i++)
        ps_printf(p, "0000000000 65535 f \n");
 
        for (i = 0; i < base; i++)
-               ps_printf(p, "%.10zu 00000 n \n", 
-                               p->ps->pdfobjs[(int)i]);
+               ps_printf(p, "%.10zu 00000 n \n",
+                   p->ps->pdfobjs[(int)i]);
 
        ps_printf(p, "trailer\n");
        ps_printf(p, "<<\n");
 
        ps_printf(p, "trailer\n");
        ps_printf(p, "<<\n");
@@ -772,14 +842,12 @@ ps_end(struct termp *p)
        ps_printf(p, "%%%%EOF\n");
 }
 
        ps_printf(p, "%%%%EOF\n");
 }
 
-
 static void
 ps_begin(struct termp *p)
 {
 static void
 ps_begin(struct termp *p)
 {
-       time_t           t;
        int              i;
 
        int              i;
 
-       /* 
+       /*
         * Print margins into margin buffer.  Nothing gets output to the
         * screen yet, so we don't need to initialise the primary state.
         */
         * Print margins into margin buffer.  Nothing gets output to the
         * screen yet, so we don't need to initialise the primary state.
         */
@@ -812,24 +880,21 @@ ps_begin(struct termp *p)
        assert(p->ps->psmarg);
        assert('\0' != p->ps->psmarg[0]);
 
        assert(p->ps->psmarg);
        assert('\0' != p->ps->psmarg[0]);
 
-       /* 
+       /*
         * Print header and initialise page state.  Following this,
         * stuff gets printed to the screen, so make sure we're sane.
         */
 
         * Print header and initialise page state.  Following this,
         * stuff gets printed to the screen, so make sure we're sane.
         */
 
-       t = time(NULL);
-
        if (TERMTYPE_PS == p->type) {
                ps_printf(p, "%%!PS-Adobe-3.0\n");
        if (TERMTYPE_PS == p->type) {
                ps_printf(p, "%%!PS-Adobe-3.0\n");
-               ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
                ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
                ps_printf(p, "%%%%Orientation: Portrait\n");
                ps_printf(p, "%%%%Pages: (atend)\n");
                ps_printf(p, "%%%%PageOrder: Ascend\n");
                ps_printf(p, "%%%%DocumentMedia: "
                ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
                ps_printf(p, "%%%%Orientation: Portrait\n");
                ps_printf(p, "%%%%Pages: (atend)\n");
                ps_printf(p, "%%%%PageOrder: Ascend\n");
                ps_printf(p, "%%%%DocumentMedia: "
-                               "Default %zu %zu 0 () ()\n",
-                               (size_t)AFM2PNT(p, p->ps->width),
-                               (size_t)AFM2PNT(p, p->ps->height));
+                   "Default %zu %zu 0 () ()\n",
+                   (size_t)AFM2PNT(p, p->ps->width),
+                   (size_t)AFM2PNT(p, p->ps->height));
                ps_printf(p, "%%%%DocumentNeededResources: font");
 
                for (i = 0; i < (int)TERMFONT__MAX; i++)
                ps_printf(p, "%%%%DocumentNeededResources: font");
 
                for (i = 0; i < (int)TERMFONT__MAX; i++)
@@ -861,7 +926,6 @@ ps_begin(struct termp *p)
        ps_setfont(p, TERMFONT_NONE);
 }
 
        ps_setfont(p, TERMFONT_NONE);
 }
 
-
 static void
 ps_pletter(struct termp *p, int c)
 {
 static void
 ps_pletter(struct termp *p, int c)
 {
@@ -874,25 +938,23 @@ ps_pletter(struct termp *p, int c)
 
        if (PS_NEWPAGE & p->ps->flags) {
                if (TERMTYPE_PS == p->type) {
 
        if (PS_NEWPAGE & p->ps->flags) {
                if (TERMTYPE_PS == p->type) {
-                       ps_printf(p, "%%%%Page: %zu %zu\n", 
-                                       p->ps->pages + 1, 
-                                       p->ps->pages + 1);
-                       ps_printf(p, "/%s %zu selectfont\n", 
-                                       fonts[(int)p->ps->lastf].name, 
-                                       p->ps->scale);
+                       ps_printf(p, "%%%%Page: %zu %zu\n",
+                           p->ps->pages + 1, p->ps->pages + 1);
+                       ps_printf(p, "/%s %zu selectfont\n",
+                           fonts[(int)p->ps->lastf].name,
+                           p->ps->scale);
                } else {
                } else {
-                       pdf_obj(p, p->ps->pdfbody + 
-                                       p->ps->pages * 4);
+                       pdf_obj(p, p->ps->pdfbody +
+                           p->ps->pages * 4);
                        ps_printf(p, "<<\n");
                        ps_printf(p, "<<\n");
-                       ps_printf(p, "/Length %zu 0 R\n", 
-                                       p->ps->pdfbody + 1 +
-                                       p->ps->pages * 4);
+                       ps_printf(p, "/Length %zu 0 R\n",
+                           p->ps->pdfbody + 1 + p->ps->pages * 4);
                        ps_printf(p, ">>\nstream\n");
                }
                p->ps->pdflastpg = p->ps->pdfbytes;
                p->ps->flags &= ~PS_NEWPAGE;
        }
                        ps_printf(p, ">>\nstream\n");
                }
                p->ps->pdflastpg = p->ps->pdfbytes;
                p->ps->flags &= ~PS_NEWPAGE;
        }
-       
+
        /*
         * If we're not in a PostScript "word" context, then open one
         * now at the current cursor.
        /*
         * If we're not in a PostScript "word" context, then open one
         * now at the current cursor.
@@ -900,16 +962,15 @@ ps_pletter(struct termp *p, int c)
 
        if ( ! (PS_INLINE & p->ps->flags)) {
                if (TERMTYPE_PS != p->type) {
 
        if ( ! (PS_INLINE & p->ps->flags)) {
                if (TERMTYPE_PS != p->type) {
-                       ps_printf(p, "BT\n/F%d %zu Tf\n", 
-                                       (int)p->ps->lastf,
-                                       p->ps->scale);
+                       ps_printf(p, "BT\n/F%d %zu Tf\n",
+                           (int)p->ps->lastf, p->ps->scale);
                        ps_printf(p, "%.3f %.3f Td\n(",
                        ps_printf(p, "%.3f %.3f Td\n(",
-                                       AFM2PNT(p, p->ps->pscol),
-                                       AFM2PNT(p, p->ps->psrow));
+                           AFM2PNT(p, p->ps->pscol),
+                           AFM2PNT(p, p->ps->psrow));
                } else
                } else
-                       ps_printf(p, "%.3f %.3f moveto\n(", 
-                                       AFM2PNT(p, p->ps->pscol),
-                                       AFM2PNT(p, p->ps->psrow));
+                       ps_printf(p, "%.3f %.3f moveto\n(",
+                           AFM2PNT(p, p->ps->pscol),
+                           AFM2PNT(p, p->ps->psrow));
                p->ps->flags |= PS_INLINE;
        }
 
                p->ps->flags |= PS_INLINE;
        }
 
@@ -923,11 +984,9 @@ ps_pletter(struct termp *p, int c)
         */
 
        switch (c) {
         */
 
        switch (c) {
-       case ('('):
-               /* FALLTHROUGH */
-       case (')'):
-               /* FALLTHROUGH */
-       case ('\\'):
+       case '(':
+       case ')':
+       case '\\':
                ps_putchar(p, '\\');
                break;
        default:
                ps_putchar(p, '\\');
                break;
        default:
@@ -938,23 +997,19 @@ ps_pletter(struct termp *p, int c)
 
        f = (int)p->ps->lastf;
 
 
        f = (int)p->ps->lastf;
 
-       if (c <= 32 || (c - 32 >= MAXCHAR)) {
-               ps_putchar(p, ' ');
-               p->ps->pscol += (size_t)fonts[f].gly[0].wx;
-               return;
-       } 
+       if (c <= 32 || c - 32 >= MAXCHAR)
+               c = 32;
 
        ps_putchar(p, (char)c);
        c -= 32;
        p->ps->pscol += (size_t)fonts[f].gly[c].wx;
 }
 
 
        ps_putchar(p, (char)c);
        c -= 32;
        p->ps->pscol += (size_t)fonts[f].gly[c].wx;
 }
 
-
 static void
 ps_pclose(struct termp *p)
 {
 
 static void
 ps_pclose(struct termp *p)
 {
 
-       /* 
+       /*
         * Spit out that we're exiting a word context (this is a
         * "partial close" because we don't check the last-char buffer
         * or anything).
         * Spit out that we're exiting a word context (this is a
         * "partial close" because we don't check the last-char buffer
         * or anything).
@@ -962,7 +1017,7 @@ ps_pclose(struct termp *p)
 
        if ( ! (PS_INLINE & p->ps->flags))
                return;
 
        if ( ! (PS_INLINE & p->ps->flags))
                return;
-       
+
        if (TERMTYPE_PS != p->type) {
                ps_printf(p, ") Tj\nET\n");
        } else
        if (TERMTYPE_PS != p->type) {
                ps_printf(p, ") Tj\nET\n");
        } else
@@ -971,85 +1026,144 @@ ps_pclose(struct termp *p)
        p->ps->flags &= ~PS_INLINE;
 }
 
        p->ps->flags &= ~PS_INLINE;
 }
 
-
+/* If we have a `last' char that wasn't printed yet, print it now. */
 static void
 static void
-ps_fclose(struct termp *p)
+ps_plast(struct termp *p)
 {
 {
+       size_t   wx;
+
+       if (p->ps->last == '\0')
+               return;
+
+       /* Check the font mode; open a new scope if it doesn't match. */
+
+       if (p->ps->nextf != p->ps->lastf) {
+               ps_pclose(p);
+               ps_setfont(p, p->ps->nextf);
+       }
+       p->ps->nextf = TERMFONT_NONE;
 
        /*
 
        /*
-        * Strong closure: if we have a last-char, spit it out after
-        * checking that we're in the right font mode.  This will of
-        * course open a new scope, if applicable.
-        *
-        * Following this, close out any scope that's open.
+        * For an overstrike, if a previous character
+        * was wider, advance to center the new one.
         */
 
         */
 
-       if ('\0' != p->ps->last) {
-               if (p->ps->lastf != TERMFONT_NONE) {
-                       ps_pclose(p);
-                       ps_setfont(p, TERMFONT_NONE);
-               }
-               ps_pletter(p, p->ps->last);
-               p->ps->last = '\0';
+       if (p->ps->pscolnext) {
+               wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
+               if (p->ps->pscol + wx < p->ps->pscolnext)
+                       p->ps->pscol = (p->ps->pscol +
+                           p->ps->pscolnext - wx) / 2;
        }
 
        }
 
-       if ( ! (PS_INLINE & p->ps->flags))
-               return;
+       ps_pletter(p, p->ps->last);
+       p->ps->last = '\0';
 
 
-       ps_pclose(p);
-}
+       /*
+        * For an overstrike, if a previous character
+        * was wider, advance to the end of the old one.
+        */
 
 
+       if (p->ps->pscol < p->ps->pscolnext) {
+               ps_pclose(p);
+               p->ps->pscol = p->ps->pscolnext;
+       }
+}
 
 static void
 ps_letter(struct termp *p, int arg)
 {
 
 static void
 ps_letter(struct termp *p, int arg)
 {
-       char            cc, c;
+       size_t          savecol;
+       char            c;
 
 
-       /* LINTED */
        c = arg >= 128 || arg <= 0 ? '?' : arg;
 
        /*
        c = arg >= 128 || arg <= 0 ? '?' : arg;
 
        /*
-        * State machine dictates whether to buffer the last character
-        * or not.  Basically, encoded words are detected by checking if
-        * we're an "8" and switching on the buffer.  Then we put "8" in
-        * our buffer, and on the next charater, flush both character
-        * and buffer.  Thus, "regular" words are detected by having a
-        * regular character and a regular buffer character.
+        * When receiving a backspace, merely flag it.
+        * We don't know yet whether it is
+        * a font instruction or an overstrike.
         */
 
         */
 
-       if ('\0' == p->ps->last) {
-               assert(8 != c);
-               p->ps->last = c;
+       if (c == '\b') {
+               assert(p->ps->last != '\0');
+               assert( ! (p->ps->flags & PS_BACKSP));
+               p->ps->flags |= PS_BACKSP;
                return;
                return;
-       } else if (8 == p->ps->last) {
-               assert(8 != c);
-               p->ps->last = '\0';
-       } else if (8 == c) {
-               assert(8 != p->ps->last);
-               if ('_' == p->ps->last) {
-                       if (p->ps->lastf != TERMFONT_UNDER) {
-                               ps_pclose(p);
-                               ps_setfont(p, TERMFONT_UNDER);
+       }
+
+       /*
+        * Decode font instructions.
+        */
+
+       if (p->ps->flags & PS_BACKSP) {
+               if (p->ps->last == '_') {
+                       switch (p->ps->nextf) {
+                       case TERMFONT_BI:
+                               break;
+                       case TERMFONT_BOLD:
+                               p->ps->nextf = TERMFONT_BI;
+                               break;
+                       default:
+                               p->ps->nextf = TERMFONT_UNDER;
                        }
                        }
-               } else if (p->ps->lastf != TERMFONT_BOLD) {
-                       ps_pclose(p);
-                       ps_setfont(p, TERMFONT_BOLD);
+                       p->ps->last = c;
+                       p->ps->flags &= ~PS_BACKSP;
+                       return;
                }
                }
-               p->ps->last = c;
-               return;
-       } else {
-               if (p->ps->lastf != TERMFONT_NONE) {
-                       ps_pclose(p);
-                       ps_setfont(p, TERMFONT_NONE);
+               if (p->ps->last == c) {
+                       switch (p->ps->nextf) {
+                       case TERMFONT_BI:
+                               break;
+                       case TERMFONT_UNDER:
+                               p->ps->nextf = TERMFONT_BI;
+                               break;
+                       default:
+                               p->ps->nextf = TERMFONT_BOLD;
+                       }
+                       p->ps->flags &= ~PS_BACKSP;
+                       return;
                }
                }
-               cc = p->ps->last;
-               p->ps->last = c;
-               c = cc;
-       }
 
 
-       ps_pletter(p, c);
-}
+               /*
+                * This is not a font instruction, but rather
+                * the next character.  Prepare for overstrike.
+                */
+
+               savecol = p->ps->pscol;
+       } else
+               savecol = SIZE_MAX;
+
+       /*
+        * We found the next character, so the font instructions
+        * for the previous one are complete.
+        * Use them and print it.
+        */
+
+       ps_plast(p);
+
+       /*
+        * Do not print the current character yet because font
+        * instructions might follow; only remember the character.
+        * It will get printed later from ps_plast().
+        */
+
+       p->ps->last = c;
+
+       /*
+        * For an overstrike, back up to the previous position.
+        * If the previous character is wider than any it overstrikes,
+        * remember the current position, because it might also be
+        * wider than all that will overstrike it.
+        */
 
 
+       if (savecol != SIZE_MAX) {
+               if (p->ps->pscolnext < p->ps->pscol)
+                       p->ps->pscolnext = p->ps->pscol;
+               ps_pclose(p);
+               p->ps->pscol = savecol;
+               p->ps->flags &= ~PS_BACKSP;
+       } else
+               p->ps->pscolnext = 0;
+}
 
 static void
 ps_advance(struct termp *p, size_t len)
 
 static void
 ps_advance(struct termp *p, size_t len)
@@ -1062,23 +1176,24 @@ ps_advance(struct termp *p, size_t len)
         * and readjust our column settings.
         */
 
         * and readjust our column settings.
         */
 
-       ps_fclose(p);
+       ps_plast(p);
+       ps_pclose(p);
        p->ps->pscol += len;
 }
 
        p->ps->pscol += len;
 }
 
-
 static void
 ps_endline(struct termp *p)
 {
 
        /* Close out any scopes we have open: we're at eoln. */
 
 static void
 ps_endline(struct termp *p)
 {
 
        /* Close out any scopes we have open: we're at eoln. */
 
-       ps_fclose(p);
+       ps_plast(p);
+       ps_pclose(p);
 
        /*
         * If we're in the margin, don't try to recalculate our current
         * row.  XXX: if the column tries to be fancy with multiple
 
        /*
         * If we're in the margin, don't try to recalculate our current
         * row.  XXX: if the column tries to be fancy with multiple
-        * lines, we'll do nasty stuff. 
+        * lines, we'll do nasty stuff.
         */
 
        if (PS_MARGINS & p->ps->flags)
         */
 
        if (PS_MARGINS & p->ps->flags)
@@ -1098,8 +1213,7 @@ ps_endline(struct termp *p)
         * showpage and restart our row.
         */
 
         * showpage and restart our row.
         */
 
-       if (p->ps->psrow >= p->ps->lineheight + 
-                       p->ps->bottom) {
+       if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
                p->ps->psrow -= p->ps->lineheight;
                return;
        }
                p->ps->psrow -= p->ps->lineheight;
                return;
        }
@@ -1107,14 +1221,13 @@ ps_endline(struct termp *p)
        ps_closepage(p);
 }
 
        ps_closepage(p);
 }
 
-
 static void
 ps_setfont(struct termp *p, enum termfont f)
 {
 
        assert(f < TERMFONT__MAX);
        p->ps->lastf = f;
 static void
 ps_setfont(struct termp *p, enum termfont f)
 {
 
        assert(f < TERMFONT__MAX);
        p->ps->lastf = f;
-       
+
        /*
         * If we're still at the top of the page, let the font-setting
         * be delayed until we actually have stuff to print.
        /*
         * If we're still at the top of the page, let the font-setting
         * be delayed until we actually have stuff to print.
@@ -1124,64 +1237,70 @@ ps_setfont(struct termp *p, enum termfont f)
                return;
 
        if (TERMTYPE_PS == p->type)
                return;
 
        if (TERMTYPE_PS == p->type)
-               ps_printf(p, "/%s %zu selectfont\n", 
-                               fonts[(int)f].name, 
-                               p->ps->scale);
+               ps_printf(p, "/%s %zu selectfont\n",
+                   fonts[(int)f].name, p->ps->scale);
        else
        else
-               ps_printf(p, "/F%d %zu Tf\n", 
-                               (int)f, 
-                               p->ps->scale);
+               ps_printf(p, "/F%d %zu Tf\n",
+                   (int)f, p->ps->scale);
 }
 
 }
 
-
-/* ARGSUSED */
 static size_t
 ps_width(const struct termp *p, int c)
 {
 
        if (c <= 32 || c - 32 >= MAXCHAR)
 static size_t
 ps_width(const struct termp *p, int c)
 {
 
        if (c <= 32 || c - 32 >= MAXCHAR)
-               return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
+               c = 0;
+       else
+               c -= 32;
 
 
-       c -= 32;
-       return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
+       return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx;
 }
 
 }
 
-
-static double
+static int
 ps_hspan(const struct termp *p, const struct roffsu *su)
 {
        double           r;
 ps_hspan(const struct termp *p, const struct roffsu *su)
 {
        double           r;
-       
+
        /*
         * All of these measurements are derived by converting from the
         * native measurement to AFM units.
         */
        /*
         * All of these measurements are derived by converting from the
         * native measurement to AFM units.
         */
-
        switch (su->unit) {
        switch (su->unit) {
-       case (SCALE_CM):
-               r = PNT2AFM(p, su->scale * 28.34);
-               break;
-       case (SCALE_IN):
-               r = PNT2AFM(p, su->scale * 72);
+       case SCALE_BU:
+               /*
+                * Traditionally, the default unit is fixed to the
+                * output media.  So this would refer to the point.  In
+                * mandoc(1), however, we stick to the default terminal
+                * scaling unit so that output is the same regardless
+                * the media.
+                */
+               r = PNT2AFM(p, su->scale * 72.0 / 240.0);
                break;
                break;
-       case (SCALE_PC):
-               r = PNT2AFM(p, su->scale * 12);
+       case SCALE_CM:
+               r = PNT2AFM(p, su->scale * 72.0 / 2.54);
                break;
                break;
-       case (SCALE_PT):
-               r = PNT2AFM(p, su->scale * 100);
+       case SCALE_EM:
+               r = su->scale *
+                   fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
                break;
                break;
-       case (SCALE_EM):
+       case SCALE_EN:
                r = su->scale *
                r = su->scale *
-                       fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
+                   fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
                break;
                break;
-       case (SCALE_MM):
-               r = PNT2AFM(p, su->scale * 2.834);
+       case SCALE_IN:
+               r = PNT2AFM(p, su->scale * 72.0);
                break;
                break;
-       case (SCALE_EN):
+       case SCALE_MM:
                r = su->scale *
                r = su->scale *
-                       fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
+                   fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
+               break;
+       case SCALE_PC:
+               r = PNT2AFM(p, su->scale * 12.0);
+               break;
+       case SCALE_PT:
+               r = PNT2AFM(p, su->scale * 1.0);
                break;
                break;
-       case (SCALE_VS):
+       case SCALE_VS:
                r = su->scale * p->ps->lineheight;
                break;
        default:
                r = su->scale * p->ps->lineheight;
                break;
        default:
@@ -1189,7 +1308,7 @@ ps_hspan(const struct termp *p, const struct roffsu *su)
                break;
        }
 
                break;
        }
 
-       return(r);
+       return r * 24.0;
 }
 
 static void
 }
 
 static void
@@ -1202,8 +1321,5 @@ ps_growbuf(struct termp *p, size_t sz)
                sz = PS_BUFSLOP;
 
        p->ps->psmargsz += sz;
                sz = PS_BUFSLOP;
 
        p->ps->psmargsz += sz;
-
-       p->ps->psmarg = mandoc_realloc
-               (p->ps->psmarg, p->ps->psmargsz);
+       p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
 }
 }
-
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