]> git.cameronkatri.com Git - mandoc.git/blobdiff - html.c
When a file is given on the command line, actually exists, and its name
[mandoc.git] / html.c
diff --git a/html.c b/html.c
index 326df035fc443c83adaa3b25773ab43a3bb284de..da9808579a36347313540777410ac6949d5bc221 100644 (file)
--- a/html.c
+++ b/html.c
@@ -1,7 +1,7 @@
-/*     $Id: html.c,v 1.150 2011/10/05 21:35:17 kristaps Exp $ */
+/*     $Id: html.c,v 1.184 2014/12/20 00:20:11 schwarze Exp $ */
 /*
- * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2008-2011, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2011, 2012, 2013, 2014 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
@@ -15,9 +15,7 @@
  * 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>
 
@@ -31,7 +29,7 @@
 #include <unistd.h>
 
 #include "mandoc.h"
-#include "libmandoc.h"
+#include "mandoc_aux.h"
 #include "out.h"
 #include "html.h"
 #include "main.h"
@@ -69,17 +67,31 @@ static      const struct htmldata htmltags[TAG_MAX] = {
        {"dt",          HTML_CLRLINE}, /* TAG_DT */
        {"dd",          HTML_CLRLINE}, /* TAG_DD */
        {"blockquote",  HTML_CLRLINE}, /* TAG_BLOCKQUOTE */
-       {"p",           HTML_CLRLINE | HTML_NOSTACK | HTML_AUTOCLOSE}, /* TAG_P */
        {"pre",         HTML_CLRLINE }, /* TAG_PRE */
        {"b",           0 }, /* TAG_B */
        {"i",           0 }, /* TAG_I */
        {"code",        0 }, /* TAG_CODE */
        {"small",       0 }, /* TAG_SMALL */
+       {"style",       HTML_CLRLINE}, /* TAG_STYLE */
+       {"math",        HTML_CLRLINE}, /* TAG_MATH */
+       {"mrow",        0}, /* TAG_MROW */
+       {"mi",          0}, /* TAG_MI */
+       {"mo",          0}, /* TAG_MO */
+       {"msup",        0}, /* TAG_MSUP */
+       {"msub",        0}, /* TAG_MSUB */
+       {"msubsup",     0}, /* TAG_MSUBSUP */
+       {"mfrac",       0}, /* TAG_MFRAC */
+       {"msqrt",       0}, /* TAG_MSQRT */
+       {"mfenced",     0}, /* TAG_MFENCED */
+       {"mtable",      0}, /* TAG_MTABLE */
+       {"mtr",         0}, /* TAG_MTR */
+       {"mtd",         0}, /* TAG_MTD */
+       {"munderover",  0}, /* TAG_MUNDEROVER */
+       {"munder",      0}, /* TAG_MUNDER*/
+       {"mover",       0}, /* TAG_MOVER*/
 };
 
 static const char      *const htmlattrs[ATTR_MAX] = {
-       "http-equiv", /* ATTR_HTTPEQUIV */
-       "content", /* ATTR_CONTENT */
        "name", /* ATTR_NAME */
        "rel", /* ATTR_REL */
        "href", /* ATTR_HREF */
@@ -87,11 +99,12 @@ static      const char      *const htmlattrs[ATTR_MAX] = {
        "media", /* ATTR_MEDIA */
        "class", /* ATTR_CLASS */
        "style", /* ATTR_STYLE */
-       "width", /* ATTR_WIDTH */
        "id", /* ATTR_ID */
-       "summary", /* ATTR_SUMMARY */
-       "align", /* ATTR_ALIGN */
        "colspan", /* ATTR_COLSPAN */
+       "charset", /* ATTR_CHARSET */
+       "open", /* ATTR_OPEN */
+       "close", /* ATTR_CLOSE */
+       "mathvariant", /* ATTR_MATHVARIANT */
 };
 
 static const char      *const roffscales[SCALE_MAX] = {
@@ -108,14 +121,15 @@ static    const char      *const roffscales[SCALE_MAX] = {
 };
 
 static void     bufncat(struct html *, const char *, size_t);
-static void     print_ctag(struct html *, enum htmltag);
+static void     print_ctag(struct html *, struct tag *);
+static int      print_escape(char);
 static int      print_encode(struct html *, const char *, int);
 static void     print_metaf(struct html *, enum mandoc_esc);
 static void     print_attr(struct html *, const char *, const char *);
-static void     *ml_alloc(char *, enum htmltype);
 
-static void *
-ml_alloc(char *outopts, enum htmltype type)
+
+void *
+html_alloc(const struct mchars *mchars, char *outopts)
 {
        struct html     *h;
        const char      *toks[5];
@@ -129,22 +143,21 @@ ml_alloc(char *outopts, enum htmltype type)
 
        h = mandoc_calloc(1, sizeof(struct html));
 
-       h->type = type;
        h->tags.head = NULL;
-       h->symtab = mchars_alloc();
+       h->symtab = mchars;
 
        while (outopts && *outopts)
                switch (getsubopt(&outopts, UNCONST(toks), &v)) {
-               case (0):
+               case 0:
                        h->style = v;
                        break;
-               case (1):
+               case 1:
                        h->base_man = v;
                        break;
-               case (2):
+               case 2:
                        h->base_includes = v;
                        break;
-               case (3):
+               case 3:
                        h->oflags |= HTML_FRAGMENT;
                        break;
                default:
@@ -154,22 +167,6 @@ ml_alloc(char *outopts, enum htmltype type)
        return(h);
 }
 
-void *
-html_alloc(char *outopts)
-{
-
-       return(ml_alloc(outopts, HTML_HTML_4_01_STRICT));
-}
-
-
-void *
-xhtml_alloc(char *outopts)
-{
-
-       return(ml_alloc(outopts, HTML_XHTML_1_0_STRICT));
-}
-
-
 void
 html_free(void *p)
 {
@@ -179,33 +176,34 @@ html_free(void *p)
        h = (struct html *)p;
 
        while ((tag = h->tags.head) != NULL) {
-               h->tags.head = tag->next;       
+               h->tags.head = tag->next;
                free(tag);
        }
-       
-       if (h->symtab)
-               mchars_free(h->symtab);
 
        free(h);
 }
 
-
 void
 print_gen_head(struct html *h)
 {
        struct htmlpair  tag[4];
+       struct tag      *t;
 
-       tag[0].key = ATTR_HTTPEQUIV;
-       tag[0].val = "Content-Type";
-       tag[1].key = ATTR_CONTENT;
-       tag[1].val = "text/html; charset=utf-8";
-       print_otag(h, TAG_META, 2, tag);
+       tag[0].key = ATTR_CHARSET;
+       tag[0].val = "utf-8";
+       print_otag(h, TAG_META, 1, tag);
 
-       tag[0].key = ATTR_NAME;
-       tag[0].val = "resource-type";
-       tag[1].key = ATTR_CONTENT;
-       tag[1].val = "document";
-       print_otag(h, TAG_META, 2, tag);
+       /*
+        * Print a default style-sheet.
+        */
+       t = print_otag(h, TAG_STYLE, 0, NULL);
+       print_text(h, "table.head, table.foot { width: 100%; }\n"
+             "td.head-rtitle, td.foot-os { text-align: right; }\n"
+             "td.head-vol { text-align: center; }\n"
+             "table.foot td { width: 50%; }\n"
+             "table.head td { width: 33%; }\n"
+             "div.spacer { margin: 1em 0; }\n");
+       print_tagq(h, t);
 
        if (h->style) {
                tag[0].key = ATTR_REL;
@@ -226,18 +224,21 @@ print_metaf(struct html *h, enum mandoc_esc deco)
        enum htmlfont    font;
 
        switch (deco) {
-       case (ESCAPE_FONTPREV):
+       case ESCAPE_FONTPREV:
                font = h->metal;
                break;
-       case (ESCAPE_FONTITALIC):
+       case ESCAPE_FONTITALIC:
                font = HTMLFONT_ITALIC;
                break;
-       case (ESCAPE_FONTBOLD):
+       case ESCAPE_FONTBOLD:
                font = HTMLFONT_BOLD;
                break;
-       case (ESCAPE_FONT):
+       case ESCAPE_FONTBI:
+               font = HTMLFONT_BI;
+               break;
+       case ESCAPE_FONT:
                /* FALLTHROUGH */
-       case (ESCAPE_FONTROMAN):
+       case ESCAPE_FONTROMAN:
                font = HTMLFONT_NONE;
                break;
        default:
@@ -253,17 +254,27 @@ print_metaf(struct html *h, enum mandoc_esc deco)
        h->metal = h->metac;
        h->metac = font;
 
-       if (HTMLFONT_NONE != font)
-               h->metaf = HTMLFONT_BOLD == font ?
-                       print_otag(h, TAG_B, 0, NULL) :
-                       print_otag(h, TAG_I, 0, NULL);
+       switch (font) {
+       case HTMLFONT_ITALIC:
+               h->metaf = print_otag(h, TAG_I, 0, NULL);
+               break;
+       case HTMLFONT_BOLD:
+               h->metaf = print_otag(h, TAG_B, 0, NULL);
+               break;
+       case HTMLFONT_BI:
+               h->metaf = print_otag(h, TAG_B, 0, NULL);
+               print_otag(h, TAG_I, 0, NULL);
+               break;
+       default:
+               break;
+       }
 }
 
 int
 html_strlen(const char *cp)
 {
-       int              ssz, sz;
-       const char      *seq, *p;
+       size_t           rsz;
+       int              skip, sz;
 
        /*
         * Account for escaped sequences within string length
@@ -274,26 +285,72 @@ html_strlen(const char *cp)
         */
 
        sz = 0;
-       while (NULL != (p = strchr(cp, '\\'))) {
-               sz += (int)(p - cp);
-               ++cp;
-               switch (mandoc_escape(&cp, &seq, &ssz)) {
-               case (ESCAPE_ERROR):
+       skip = 0;
+       while (1) {
+               rsz = strcspn(cp, "\\");
+               if (rsz) {
+                       cp += rsz;
+                       if (skip) {
+                               skip = 0;
+                               rsz--;
+                       }
+                       sz += rsz;
+               }
+               if ('\0' == *cp)
+                       break;
+               cp++;
+               switch (mandoc_escape(&cp, NULL, NULL)) {
+               case ESCAPE_ERROR:
                        return(sz);
-               case (ESCAPE_UNICODE):
+               case ESCAPE_UNICODE:
                        /* FALLTHROUGH */
-               case (ESCAPE_NUMBERED):
+               case ESCAPE_NUMBERED:
                        /* FALLTHROUGH */
-               case (ESCAPE_SPECIAL):
-                       sz++;
+               case ESCAPE_SPECIAL:
+                       if (skip)
+                               skip = 0;
+                       else
+                               sz++;
+                       break;
+               case ESCAPE_SKIPCHAR:
+                       skip = 1;
                        break;
                default:
                        break;
                }
        }
+       return(sz);
+}
 
-       assert(sz >= 0);
-       return(sz + strlen(cp));
+static int
+print_escape(char c)
+{
+
+       switch (c) {
+       case '<':
+               printf("&lt;");
+               break;
+       case '>':
+               printf("&gt;");
+               break;
+       case '&':
+               printf("&amp;");
+               break;
+       case '"':
+               printf("&quot;");
+               break;
+       case ASCII_NBRSP:
+               putchar('-');
+               break;
+       case ASCII_HYPH:
+               putchar('-');
+               /* FALLTHROUGH */
+       case ASCII_BREAK:
+               break;
+       default:
+               return(0);
+       }
+       return(1);
 }
 
 static int
@@ -303,11 +360,18 @@ print_encode(struct html *h, const char *p, int norecurse)
        int              c, len, nospace;
        const char      *seq;
        enum mandoc_esc  esc;
-       static const char rejs[6] = { '\\', '<', '>', '&', ASCII_HYPH, '\0' };
+       static const char rejs[9] = { '\\', '<', '>', '&', '"',
+               ASCII_NBRSP, ASCII_HYPH, ASCII_BREAK, '\0' };
 
        nospace = 0;
 
        while ('\0' != *p) {
+               if (HTML_SKIPCHAR & h->flags && '\\' != *p) {
+                       h->flags &= ~HTML_SKIPCHAR;
+                       p++;
+                       continue;
+               }
+
                sz = strcspn(p, rejs);
 
                fwrite(p, 1, sz, stdout);
@@ -316,72 +380,74 @@ print_encode(struct html *h, const char *p, int norecurse)
                if ('\0' == *p)
                        break;
 
-               switch (*p++) {
-               case ('<'):
-                       printf("&lt;");
+               if (print_escape(*p++))
                        continue;
-               case ('>'):
-                       printf("&gt;");
-                       continue;
-               case ('&'):
-                       printf("&amp;");
+
+               esc = mandoc_escape(&p, &seq, &len);
+               if (ESCAPE_ERROR == esc)
+                       break;
+
+               switch (esc) {
+               case ESCAPE_FONT:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTPREV:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTBOLD:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTITALIC:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTBI:
+                       /* FALLTHROUGH */
+               case ESCAPE_FONTROMAN:
+                       if (0 == norecurse)
+                               print_metaf(h, esc);
                        continue;
-               case (ASCII_HYPH):
-                       putchar('-');
+               case ESCAPE_SKIPCHAR:
+                       h->flags |= HTML_SKIPCHAR;
                        continue;
                default:
                        break;
                }
 
-               esc = mandoc_escape(&p, &seq, &len);
-               if (ESCAPE_ERROR == esc)
-                       break;
+               if (h->flags & HTML_SKIPCHAR) {
+                       h->flags &= ~HTML_SKIPCHAR;
+                       continue;
+               }
 
                switch (esc) {
-               case (ESCAPE_UNICODE):
-                       /* Skip passed "u" header. */
+               case ESCAPE_UNICODE:
+                       /* Skip past "u" header. */
                        c = mchars_num2uc(seq + 1, len - 1);
-                       if ('\0' != c)
-                               printf("&#x%x;", c);
                        break;
-               case (ESCAPE_NUMBERED):
+               case ESCAPE_NUMBERED:
                        c = mchars_num2char(seq, len);
-                       if ('\0' != c)
-                               putchar(c);
+                       if (c < 0)
+                               continue;
                        break;
-               case (ESCAPE_SPECIAL):
+               case ESCAPE_SPECIAL:
                        c = mchars_spec2cp(h->symtab, seq, len);
-                       if (c > 0)
-                               printf("&#%d;", c);
-                       else if (-1 == c && 1 == len)
-                               putchar((int)*seq);
-                       break;
-               case (ESCAPE_FONT):
-                       /* FALLTHROUGH */
-               case (ESCAPE_FONTPREV):
-                       /* FALLTHROUGH */
-               case (ESCAPE_FONTBOLD):
-                       /* FALLTHROUGH */
-               case (ESCAPE_FONTITALIC):
-                       /* FALLTHROUGH */
-               case (ESCAPE_FONTROMAN):
-                       if (norecurse)
-                               break;
-                       print_metaf(h, esc);
+                       if (c <= 0)
+                               continue;
                        break;
-               case (ESCAPE_NOSPACE):
+               case ESCAPE_NOSPACE:
                        if ('\0' == *p)
                                nospace = 1;
-                       break;
+                       continue;
                default:
-                       break;
+                       continue;
                }
+               if ((c < 0x20 && c != 0x09) ||
+                   (c > 0x7E && c < 0xA0))
+                       c = 0xFFFD;
+               if (c > 0x7E)
+                       printf("&#%d;", c);
+               else if ( ! print_escape(c))
+                       putchar(c);
        }
 
        return(nospace);
 }
 
-
 static void
 print_attr(struct html *h, const char *key, const char *val)
 {
@@ -390,9 +456,8 @@ print_attr(struct html *h, const char *key, const char *val)
        putchar('\"');
 }
 
-
 struct tag *
-print_otag(struct html *h, enum htmltag tag, 
+print_otag(struct html *h, enum htmltag tag,
                int sz, const struct htmlpair *p)
 {
        int              i;
@@ -430,24 +495,10 @@ print_otag(struct html *h, enum htmltag tag,
        for (i = 0; i < sz; i++)
                print_attr(h, htmlattrs[p[i].key], p[i].val);
 
-       /* Add non-overridable attributes. */
-
-       if (TAG_HTML == tag && HTML_XHTML_1_0_STRICT == h->type) {
-               print_attr(h, "xmlns", "http://www.w3.org/1999/xhtml");
-               print_attr(h, "xml:lang", "en");
-               print_attr(h, "lang", "en");
-       }
-
-       /* Accommodate for XML "well-formed" singleton escaping. */
+       /* Accommodate for "well-formed" singleton escaping. */
 
        if (HTML_AUTOCLOSE & htmltags[tag].flags)
-               switch (h->type) {
-               case (HTML_XHTML_1_0_STRICT):
-                       putchar('/');
-                       break;
-               default:
-                       break;
-               }
+               putchar('/');
 
        putchar('>');
 
@@ -459,41 +510,34 @@ print_otag(struct html *h, enum htmltag tag,
        return(t);
 }
 
-
 static void
-print_ctag(struct html *h, enum htmltag tag)
+print_ctag(struct html *h, struct tag *tag)
 {
-       
-       printf("</%s>", htmltags[tag].name);
-       if (HTML_CLRLINE & htmltags[tag].flags) {
+
+       /*
+        * Remember to close out and nullify the current
+        * meta-font and table, if applicable.
+        */
+       if (tag == h->metaf)
+               h->metaf = NULL;
+       if (tag == h->tblt)
+               h->tblt = NULL;
+
+       printf("</%s>", htmltags[tag->tag].name);
+       if (HTML_CLRLINE & htmltags[tag->tag].flags) {
                h->flags |= HTML_NOSPACE;
                putchar('\n');
-       } 
+       }
+
+       h->tags.head = tag->next;
+       free(tag);
 }
 
 void
 print_gen_decls(struct html *h)
 {
-       const char      *doctype;
-       const char      *dtd;
-       const char      *name;
-
-       switch (h->type) {
-       case (HTML_HTML_4_01_STRICT):
-               name = "HTML";
-               doctype = "-//W3C//DTD HTML 4.01//EN";
-               dtd = "http://www.w3.org/TR/html4/strict.dtd";
-               break;
-       default:
-               puts("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
-               name = "html";
-               doctype = "-//W3C//DTD XHTML 1.0 Strict//EN";
-               dtd = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";
-               break;
-       }
 
-       printf("<!DOCTYPE %s PUBLIC \"%s\" \"%s\">\n", 
-                       name, doctype, dtd);
+       puts("<!DOCTYPE html>");
 }
 
 void
@@ -511,17 +555,28 @@ print_text(struct html *h, const char *word)
        }
 
        assert(NULL == h->metaf);
-       if (HTMLFONT_NONE != h->metac)
-               h->metaf = HTMLFONT_BOLD == h->metac ?
-                       print_otag(h, TAG_B, 0, NULL) :
-                       print_otag(h, TAG_I, 0, NULL);
+       switch (h->metac) {
+       case HTMLFONT_ITALIC:
+               h->metaf = print_otag(h, TAG_I, 0, NULL);
+               break;
+       case HTMLFONT_BOLD:
+               h->metaf = print_otag(h, TAG_B, 0, NULL);
+               break;
+       case HTMLFONT_BI:
+               h->metaf = print_otag(h, TAG_B, 0, NULL);
+               print_otag(h, TAG_I, 0, NULL);
+               break;
+       default:
+               break;
+       }
 
        assert(word);
        if ( ! print_encode(h, word, 0)) {
                if ( ! (h->flags & HTML_NONOSPACE))
                        h->flags &= ~HTML_NOSPACE;
+               h->flags &= ~HTML_NONEWLINE;
        } else
-               h->flags |= HTML_NOSPACE;
+               h->flags |= HTML_NOSPACE | HTML_NONEWLINE;
 
        if (h->metaf) {
                print_tagq(h, h->metaf);
@@ -531,30 +586,18 @@ print_text(struct html *h, const char *word)
        h->flags &= ~HTML_IGNDELIM;
 }
 
-
 void
 print_tagq(struct html *h, const struct tag *until)
 {
        struct tag      *tag;
 
        while ((tag = h->tags.head) != NULL) {
-               /* 
-                * Remember to close out and nullify the current
-                * meta-font and table, if applicable.
-                */
-               if (tag == h->metaf)
-                       h->metaf = NULL;
-               if (tag == h->tblt)
-                       h->tblt = NULL;
-               print_ctag(h, tag->tag);
-               h->tags.head = tag->next;
-               free(tag);
+               print_ctag(h, tag);
                if (until && tag == until)
                        return;
        }
 }
 
-
 void
 print_stagq(struct html *h, const struct tag *suntil)
 {
@@ -563,20 +606,22 @@ print_stagq(struct html *h, const struct tag *suntil)
        while ((tag = h->tags.head) != NULL) {
                if (suntil && tag == suntil)
                        return;
-               /* 
-                * Remember to close out and nullify the current
-                * meta-font and table, if applicable.
-                */
-               if (tag == h->metaf)
-                       h->metaf = NULL;
-               if (tag == h->tblt)
-                       h->tblt = NULL;
-               print_ctag(h, tag->tag);
-               h->tags.head = tag->next;
-               free(tag);
+               print_ctag(h, tag);
        }
 }
 
+void
+print_paragraph(struct html *h)
+{
+       struct tag      *t;
+       struct htmlpair  tag;
+
+       PAIR_CLASS_INIT(&tag, "spacer");
+       t = print_otag(h, TAG_DIV, 1, &tag);
+       print_tagq(h, t);
+}
+
+
 void
 bufinit(struct html *h)
 {
@@ -599,6 +644,12 @@ void
 bufcat(struct html *h, const char *p)
 {
 
+       /*
+        * XXX This is broken and not easy to fix.
+        * When using the -Oincludes option, buffmt_includes()
+        * may pass in strings overrunning BUFSIZ, causing a crash.
+        */
+
        h->buflen = strlcat(h->buf, p, BUFSIZ);
        assert(h->buflen < BUFSIZ);
 }
@@ -609,8 +660,8 @@ bufcat_fmt(struct html *h, const char *fmt, ...)
        va_list          ap;
 
        va_start(ap, fmt);
-       (void)vsnprintf(h->buf + (int)h->buflen, 
-                       BUFSIZ - h->buflen - 1, fmt, ap);
+       (void)vsnprintf(h->buf + (int)h->buflen,
+           BUFSIZ - h->buflen - 1, fmt, ap);
        va_end(ap);
        h->buflen = strlen(h->buf);
 }
@@ -630,12 +681,12 @@ buffmt_includes(struct html *h, const char *name)
        const char      *p, *pp;
 
        pp = h->base_includes;
-       
+
        bufinit(h);
        while (NULL != (p = strchr(pp, '%'))) {
                bufncat(h, pp, (size_t)(p - pp));
                switch (*(p + 1)) {
-               case('I'):
+               case'I':
                        bufcat(h, name);
                        break;
                default:
@@ -649,22 +700,21 @@ buffmt_includes(struct html *h, const char *name)
 }
 
 void
-buffmt_man(struct html *h, 
-               const char *name, const char *sec)
+buffmt_man(struct html *h, const char *name, const char *sec)
 {
        const char      *p, *pp;
 
        pp = h->base_man;
-       
+
        bufinit(h);
        while (NULL != (p = strchr(pp, '%'))) {
                bufncat(h, pp, (size_t)(p - pp));
                switch (*(p + 1)) {
-               case('S'):
+               case 'S':
                        bufcat(h, sec ? sec : "1");
                        break;
-               case('N'):
-                       bufcat_fmt(h, name);
+               case 'N':
+                       bufcat_fmt(h, "%s", name);
                        break;
                default:
                        bufncat(h, p, 2);
@@ -684,6 +734,8 @@ bufcat_su(struct html *h, const char *p, const struct roffsu *su)
        v = su->scale;
        if (SCALE_MM == su->unit && 0.0 == (v /= 100.0))
                v = 1.0;
+       else if (SCALE_BU == su->unit)
+               v /= 24.0;
 
        bufcat_fmt(h, "%s: %.2f%s;", p, v, roffscales[su->unit]);
 }