+void
+flushln(struct termp *p)
+{
+ size_t i, j, vsz, vis, maxvis;
+
+ /*
+ * 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 = p->rmargin - p->offset;
+ vis = 0;
+
+ /*
+ * If in the standard case (left-justified), then begin with our
+ * indentation, otherwise (columns, etc.) just start spitting
+ * out text.
+ */
+
+ if ( ! (p->flags & TERMP_NOLPAD))
+ /* LINTED */
+ for (j = 0; j < p->offset; j++)
+ putchar(' ');
+
+ /*
+ * If we're literal, print out verbatim.
+ */
+ if (p->flags & TERMP_LITERAL) {
+ for (i = 0; i < p->col; i++)
+ putchar(p->buf[i]);
+ putchar('\n');
+ p->col = 0;
+ return;
+ }
+
+ for (i = 0; i < p->col; i++) {
+ /*
+ * 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 (j = i, vsz = 0; j < p->col; j++) {
+ if (xisspace(p->buf[j]))
+ break;
+ else if (27 == p->buf[j]) {
+ assert(j + 4 <= p->col);
+ j += 3;
+ } else
+ vsz++;
+ }
+
+ /*
+ * If we're breaking normally...
+ *
+ * If a word is too long and we're within a line, put it
+ * on the next line. Puke if we're being asked to write
+ * something that will exceed the right margin (i.e.,
+ * from a fresh line).
+ *
+ * If we're not breaking...
+ *
+ * Don't let the visible size exceed the full right
+ * margin.
+ */
+
+ if ( ! (TERMP_NOBREAK & p->flags)) {
+ if (vis && vis + vsz > maxvis) {
+ putchar('\n');
+ for (j = 0; j < p->offset; j++)
+ putchar(' ');
+ vis = 0;
+ } else if (vis + vsz > maxvis)
+ errx(1, "word breaks right margin");
+ } else if (vis + vsz > p->maxrmargin - p->offset) {
+ putchar('\n');
+ for (j = 0; j < p->rmargin; j++)
+ putchar(' ');
+ vis = p->rmargin;
+ }
+
+ /*
+ * Write out the word and a trailing space. Omit the
+ * space if we're the last word in the line.
+ */
+
+ for ( ; i < p->col; i++) {
+ if (xisspace(p->buf[i]))
+ break;
+ putchar(p->buf[i]);
+ }
+ vis += vsz;
+ if (i < p->col) {
+ putchar(' ');
+ vis++;
+ }
+ }
+
+ if ((TERMP_NOBREAK & p->flags) && vis >= maxvis) {
+ putchar('\n');
+ for (i = 0; i < p->rmargin; i++)
+ putchar(' ');
+ p->col = 0;
+ return;
+ }
+
+ /*
+ * If we're not to right-marginalise it (newline), then instead
+ * pad to the right margin and stay off.
+ */
+
+ if (p->flags & TERMP_NOBREAK) {
+ for ( ; vis < maxvis; vis++)
+ putchar(' ');
+ } else
+ putchar('\n');
+
+ p->col = 0;
+}
+
+
+void
+newln(struct termp *p)
+{
+
+ /*
+ * A newline only breaks an existing line; it won't assert
+ * vertical space.
+ */
+ p->flags |= TERMP_NOSPACE;
+ if (0 == p->col) {
+ p->flags &= ~TERMP_NOLPAD;
+ return;
+ }
+ flushln(p);
+ p->flags &= ~TERMP_NOLPAD;
+}
+
+
+void
+vspace(struct termp *p)
+{
+
+ /*
+ * Asserts a vertical space (a full, empty line-break between
+ * lines).
+ */
+ newln(p);
+ putchar('\n');
+}
+
+
+static void
+stringa(struct termp *p, const char *s)
+{
+
+ /* XXX - speed up if not passing to chara. */
+ for ( ; *s; s++)
+ chara(p, *s);
+}
+
+
+static void
+chara(struct termp *p, char c)
+{
+
+ /*
+ * Insert a single character into the line-buffer. If the
+ * buffer's space is exceeded, then allocate more space.
+ */
+ if (p->col + 1 >= p->maxcols) {
+ p->buf = realloc(p->buf, p->maxcols * 2);
+ if (NULL == p->buf)
+ err(1, "malloc");
+ p->maxcols *= 2;
+ }
+ p->buf[(p->col)++] = c;
+}
+
+
+static void
+style(struct termp *p, enum termstyle esc)
+{
+
+ if (p->col + 4 >= p->maxcols)
+ errx(1, "line overrun");
+
+ p->buf[(p->col)++] = 27;
+ p->buf[(p->col)++] = '[';
+ switch (esc) {
+ case (STYLE_CLEAR):
+ p->buf[(p->col)++] = '0';
+ break;
+ case (STYLE_BOLD):
+ p->buf[(p->col)++] = '1';
+ break;
+ case (STYLE_UNDERLINE):
+ p->buf[(p->col)++] = '4';
+ break;
+ default:
+ abort();
+ /* NOTREACHED */
+ }
+ p->buf[(p->col)++] = 'm';
+}
+
+
+static void
+nescape(struct termp *p, const char *word, size_t len)
+{
+
+ switch (len) {
+ case (1):
+ if ('q' == word[0])
+ stringa(p, TERMSYM_DQUOTE);
+ break;
+ case (2):
+ if ('r' == word[0] && 'B' == word[1])
+ stringa(p, TERMSYM_RBRACK);
+ else if ('l' == word[0] && 'B' == word[1])
+ stringa(p, TERMSYM_LBRACK);
+ else if ('l' == word[0] && 'q' == word[1])
+ stringa(p, TERMSYM_LDQUOTE);
+ else if ('r' == word[0] && 'q' == word[1])
+ stringa(p, TERMSYM_RDQUOTE);
+ else if ('o' == word[0] && 'q' == word[1])
+ stringa(p, TERMSYM_LSQUOTE);
+ else if ('a' == word[0] && 'q' == word[1])
+ stringa(p, TERMSYM_RSQUOTE);
+ else if ('<' == word[0] && '-' == word[1])
+ stringa(p, TERMSYM_LARROW);
+ else if ('-' == word[0] && '>' == word[1])
+ stringa(p, TERMSYM_RARROW);
+ else if ('b' == word[0] && 'u' == word[1])
+ stringa(p, TERMSYM_BULLET);
+ else if ('<' == word[0] && '=' == word[1])
+ stringa(p, TERMSYM_LE);
+ else if ('>' == word[0] && '=' == word[1])
+ stringa(p, TERMSYM_GE);
+ else if ('=' == word[0] && '=' == word[1])
+ stringa(p, TERMSYM_EQ);
+ else if ('+' == word[0] && '-' == word[1])
+ stringa(p, TERMSYM_PLUSMINUS);
+ else if ('u' == word[0] && 'a' == word[1])
+ stringa(p, TERMSYM_UARROW);
+ else if ('d' == word[0] && 'a' == word[1])
+ stringa(p, TERMSYM_DARROW);
+ else if ('a' == word[0] && 'a' == word[1])
+ stringa(p, TERMSYM_ACUTE);
+ else if ('g' == word[0] && 'a' == word[1])
+ stringa(p, TERMSYM_GRAVE);
+ else if ('!' == word[0] && '=' == word[1])
+ stringa(p, TERMSYM_NEQ);
+ else if ('i' == word[0] && 'f' == word[1])
+ stringa(p, TERMSYM_INF);
+ else if ('n' == word[0] && 'a' == word[1])
+ stringa(p, TERMSYM_NAN);
+ else if ('b' == word[0] && 'a' == word[1])
+ stringa(p, TERMSYM_BAR);
+
+ /* Deprecated forms. */
+ else if ('B' == word[0] && 'a' == word[1])
+ stringa(p, TERMSYM_BAR);
+ else if ('I' == word[0] && 'f' == word[1])
+ stringa(p, TERMSYM_INF2);
+ else if ('G' == word[0] && 'e' == word[1])
+ stringa(p, TERMSYM_GE);
+ else if ('G' == word[0] && 't' == word[1])
+ stringa(p, TERMSYM_GT);
+ else if ('L' == word[0] && 'e' == word[1])
+ stringa(p, TERMSYM_LE);
+ else if ('L' == word[0] && 'q' == word[1])
+ stringa(p, TERMSYM_LDQUOTE);
+ else if ('L' == word[0] && 't' == word[1])
+ stringa(p, TERMSYM_LT);
+ else if ('N' == word[0] && 'a' == word[1])
+ stringa(p, TERMSYM_NAN);
+ else if ('N' == word[0] && 'e' == word[1])
+ stringa(p, TERMSYM_NEQ);
+ else if ('P' == word[0] && 'i' == word[1])
+ stringa(p, TERMSYM_PI);
+ else if ('P' == word[0] && 'm' == word[1])
+ stringa(p, TERMSYM_PLUSMINUS);
+ else if ('R' == word[0] && 'q' == word[1])
+ stringa(p, TERMSYM_RDQUOTE);
+ break;
+ default:
+ break;
+ }
+}
+
+
+static void
+pgraph(struct termp *p, char byte)
+{
+ int i;
+
+ switch (byte) {
+ case (' '):
+ chara(p, ' ');
+ break;
+ case ('\t'):
+ for (i = 0; i < INDENT; i++)
+ chara(p, ' ');
+ break;
+ default:
+ warnx("unknown non-graphing character");
+ break;
+ }
+}
+
+
+static void
+pescape(struct termp *p, const char *word, size_t *i, size_t len)
+{
+ size_t j;
+
+ (*i)++;
+ assert(*i < len);
+
+ /*
+ * Handle an escape sequence. This must manage both groff-style
+ * escapes and mdoc-style escapes.
+ */
+
+ if ('(' == word[*i]) {
+ /* Two-character escapes. */
+ (*i)++;
+ assert(*i + 1 < len);
+ nescape(p, &word[*i], 2);
+ (*i)++;
+ return;
+
+ } else if ('*' == word[*i]) {
+ (*i)++;
+ assert(*i < len);
+ switch (word[*i]) {
+ case ('('):
+ (*i)++;
+ assert(*i + 1 < len);
+ nescape(p, &word[*i], 2);
+ (*i)++;
+ return;
+ default:
+ break;
+ }
+ nescape(p, &word[*i], 1);
+ return;
+
+ } else if ('[' != word[*i]) {
+ /* One-character escapes. */
+ switch (word[*i]) {
+ case ('\\'):
+ /* FALLTHROUGH */
+ case ('\''):
+ /* FALLTHROUGH */
+ case ('`'):
+ /* FALLTHROUGH */
+ case ('-'):
+ /* FALLTHROUGH */
+ case (' '):
+ /* FALLTHROUGH */
+ case ('.'):
+ chara(p, word[*i]);
+ break;
+ case ('e'):
+ chara(p, '\\');
+ break;
+ default:
+ break;
+ }
+ return;
+ }
+
+ (*i)++;
+ for (j = 0; word[*i] && ']' != word[*i]; (*i)++, j++)
+ /* Loop... */ ;
+
+ nescape(p, &word[*i - j], j);
+}
+
+
+static void
+pword(struct termp *p, const char *word, size_t len)
+{
+ size_t i;
+
+ /*
+ * 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.
+ */
+
+ if ( ! (p->flags & TERMP_NOSPACE) &&
+ ! (p->flags & TERMP_LITERAL))
+ chara(p, ' ');
+
+ if ( ! (p->flags & TERMP_NONOSPACE))
+ p->flags &= ~TERMP_NOSPACE;
+
+ /*
+ * XXX - if literal and underlining, this will underline the
+ * spaces between literal words.
+ */
+
+ if (p->flags & TERMP_BOLD)
+ style(p, STYLE_BOLD);
+ if (p->flags & TERMP_UNDERLINE)
+ style(p, STYLE_UNDERLINE);
+
+ for (i = 0; i < len; i++) {
+ if ('\\' == word[i]) {
+ pescape(p, word, &i, len);
+ continue;
+ }
+ if ( ! isgraph((int)word[i])) {
+ pgraph(p, word[i]);
+ continue;
+ }
+ chara(p, word[i]);
+ }
+
+ if (p->flags & TERMP_BOLD ||
+ p->flags & TERMP_UNDERLINE)
+ style(p, STYLE_CLEAR);
+}
+
+
+void
+word(struct termp *p, const char *word)
+{
+ size_t i, j, len;
+
+ /*
+ * Break apart a word into tokens. If we're a literal word,
+ * then don't. This doesn't handle zero-length words (there
+ * should be none) and makes sure that pword doesn't get spaces
+ * or nil words unless literal.
+ */
+
+ if (p->flags & TERMP_LITERAL) {
+ pword(p, word, strlen(word));
+ return;
+ }
+
+ len = strlen(word);
+ assert(len > 0);
+
+ if (mdoc_isdelim(word)) {
+ if ( ! (p->flags & TERMP_IGNDELIM))
+ p->flags |= TERMP_NOSPACE;
+ p->flags &= ~TERMP_IGNDELIM;
+ }
+
+ /* LINTED */
+ for (j = i = 0; i < len; i++) {
+ if ( ! xisspace(word[i])) {
+ j++;
+ continue;
+ }
+
+ /* Escaped spaces don't delimit... */
+ if (i > 0 && xisspace(word[i]) && '\\' == word[i - 1]) {
+ j++;
+ continue;
+ }
+
+ if (0 == j)
+ continue;
+ assert(i >= j);
+ pword(p, &word[i - j], j);
+ j = 0;
+ }
+ if (j > 0) {
+ assert(i >= j);
+ pword(p, &word[i - j], j);
+ }
+}
+
+
+static void
+body(struct termp *p, struct termpair *ppair,
+ const struct mdoc_meta *meta,
+ const struct mdoc_node *node)
+{
+ int dochild;
+ struct termpair pair;
+
+ /*
+ * This is the main function for printing out nodes. It's
+ * constituted of PRE and POST functions, which correspond to
+ * prefix and infix processing.
+ */
+
+ /* Pre-processing. */
+
+ dochild = 1;
+ pair.ppair = ppair;
+ pair.type = 0;
+ pair.offset = pair.rmargin = 0;
+ pair.flag = 0;
+ pair.count = 0;
+
+ if (MDOC_TEXT != node->type) {
+ if (termacts[node->tok].pre)
+ if ( ! (*termacts[node->tok].pre)(p, &pair, meta, node))
+ dochild = 0;
+ } else /* MDOC_TEXT == node->type */
+ word(p, node->data.text.string);
+
+ /* Children. */
+
+ if (TERMPAIR_FLAG & pair.type)
+ p->flags |= pair.flag;
+
+ if (dochild && node->child)
+ body(p, &pair, meta, node->child);
+
+ if (TERMPAIR_FLAG & pair.type)
+ p->flags &= ~pair.flag;
+
+ /* Post-processing. */
+
+ if (MDOC_TEXT != node->type)
+ if (termacts[node->tok].post)
+ (*termacts[node->tok].post)(p, &pair, meta, node);
+
+ /* Siblings. */
+
+ if (node->next)
+ body(p, ppair, meta, node->next);
+}
+
+
+static void
+footer(struct termp *p, const struct mdoc_meta *meta)
+{
+ struct tm *tm;
+ char *buf, *os;
+
+ if (NULL == (buf = malloc(p->rmargin)))
+ err(1, "malloc");
+ if (NULL == (os = malloc(p->rmargin)))
+ err(1, "malloc");
+
+ tm = localtime(&meta->date);
+
+#ifdef __OpenBSD__
+ if (NULL == strftime(buf, p->rmargin, "%B %d, %Y", tm))
+#else
+ if (0 == strftime(buf, p->rmargin, "%B %d, %Y", tm))
+#endif
+ err(1, "strftime");
+
+ (void)strlcpy(os, meta->os, p->rmargin);
+
+ /*
+ * This is /slightly/ different from regular groff output
+ * because we don't have page numbers. Print the following:
+ *
+ * OS MDOCDATE
+ */
+
+ vspace(p);
+
+ p->flags |= TERMP_NOSPACE | TERMP_NOBREAK;
+ p->rmargin = p->maxrmargin - strlen(buf);
+ p->offset = 0;
+
+ word(p, os);
+ flushln(p);
+
+ p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
+ p->offset = p->rmargin;
+ p->rmargin = p->maxrmargin;
+ p->flags &= ~TERMP_NOBREAK;
+
+ word(p, buf);
+ flushln(p);
+
+ free(buf);
+ free(os);
+}
+
+
+static void
+header(struct termp *p, const struct mdoc_meta *meta)
+{
+ char *buf, *title, *bufp, *vbuf;
+ const char *pp;
+ struct utsname uts;
+
+ p->rmargin = p->maxrmargin;
+ p->offset = 0;
+
+ if (NULL == (buf = malloc(p->rmargin)))
+ err(1, "malloc");
+ if (NULL == (title = malloc(p->rmargin)))
+ err(1, "malloc");
+ if (NULL == (vbuf = malloc(p->rmargin)))
+ err(1, "malloc");
+
+ if (NULL == (pp = mdoc_vol2a(meta->vol))) {
+ switch (meta->msec) {
+ case (MSEC_1):
+ /* FALLTHROUGH */
+ case (MSEC_6):
+ /* FALLTHROUGH */
+ case (MSEC_7):
+ pp = mdoc_vol2a(VOL_URM);
+ break;
+ case (MSEC_8):
+ pp = mdoc_vol2a(VOL_SMM);
+ break;
+ case (MSEC_2):
+ /* FALLTHROUGH */
+ case (MSEC_3):
+ /* FALLTHROUGH */
+ case (MSEC_4):
+ /* FALLTHROUGH */
+ case (MSEC_5):
+ pp = mdoc_vol2a(VOL_PRM);
+ break;
+ case (MSEC_9):
+ pp = mdoc_vol2a(VOL_KM);
+ break;
+ default:
+ break;
+ }
+ }
+ vbuf[0] = 0;
+
+ if (pp) {
+ if (-1 == uname(&uts))
+ err(1, "uname");
+ (void)strlcat(vbuf, uts.sysname, p->rmargin);
+ (void)strlcat(vbuf, " ", p->rmargin);
+ } else if (NULL == (pp = mdoc_msec2a(meta->msec)))
+ pp = mdoc_msec2a(MSEC_local);
+
+ (void)strlcat(vbuf, pp, p->rmargin);
+
+ /*
+ * The header is strange. It has three components, which are
+ * really two with the first duplicated. It goes like this:
+ *
+ * IDENTIFIER TITLE IDENTIFIER
+ *
+ * The IDENTIFIER is NAME(SECTION), which is the command-name
+ * (if given, or "unknown" if not) followed by the manual page
+ * section. These are given in `Dt'. The TITLE is a free-form
+ * string depending on the manual volume. If not specified, it
+ * switches on the manual section.
+ */
+
+ if (mdoc_arch2a(meta->arch))
+ (void)snprintf(buf, p->rmargin, "%s (%s)",
+ vbuf, mdoc_arch2a(meta->arch));
+ else
+ (void)strlcpy(buf, vbuf, p->rmargin);
+
+ pp = mdoc_msec2a(meta->msec);
+
+ (void)snprintf(title, p->rmargin, "%s(%s)",
+ meta->title, pp ? pp : "");
+
+ for (bufp = title; *bufp; bufp++)
+ *bufp = toupper(*bufp);
+
+ p->offset = 0;
+ p->rmargin = (p->maxrmargin - strlen(buf)) / 2;
+ p->flags |= TERMP_NOBREAK | TERMP_NOSPACE;
+
+ word(p, title);
+ flushln(p);
+
+ p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
+ p->offset = p->rmargin;
+ p->rmargin = p->maxrmargin - strlen(title);
+
+ word(p, buf);
+ flushln(p);
+
+ p->offset = p->rmargin;
+ p->rmargin = p->maxrmargin;
+ p->flags &= ~TERMP_NOBREAK;
+ p->flags |= TERMP_NOLPAD | TERMP_NOSPACE;
+
+ word(p, title);
+ flushln(p);
+
+ p->rmargin = p->maxrmargin;
+ p->offset = 0;
+ p->flags &= ~TERMP_NOSPACE;
+
+ free(title);
+ free(vbuf);
+ free(buf);
+}
git.ckatri.com / mandoc.git / blobdiff