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-rw-r--r--usr.bin/mandoc/tbl_layout.c371
1 files changed, 371 insertions, 0 deletions
diff --git a/usr.bin/mandoc/tbl_layout.c b/usr.bin/mandoc/tbl_layout.c
new file mode 100644
index 0000000..aae36d9
--- /dev/null
+++ b/usr.bin/mandoc/tbl_layout.c
@@ -0,0 +1,371 @@
+/* $OpenBSD: tbl_layout.c,v 1.35 2018/12/14 05:17:45 schwarze Exp $ */
+/*
+ * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2012, 2014, 2015, 2017 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.
+ *
+ * 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.
+ */
+#include <sys/types.h>
+
+#include <ctype.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+#include "mandoc_aux.h"
+#include "mandoc.h"
+#include "tbl.h"
+#include "libmandoc.h"
+#include "tbl_int.h"
+
+struct tbl_phrase {
+ char name;
+ enum tbl_cellt key;
+};
+
+static const struct tbl_phrase keys[] = {
+ { 'c', TBL_CELL_CENTRE },
+ { 'r', TBL_CELL_RIGHT },
+ { 'l', TBL_CELL_LEFT },
+ { 'n', TBL_CELL_NUMBER },
+ { 's', TBL_CELL_SPAN },
+ { 'a', TBL_CELL_LONG },
+ { '^', TBL_CELL_DOWN },
+ { '-', TBL_CELL_HORIZ },
+ { '_', TBL_CELL_HORIZ },
+ { '=', TBL_CELL_DHORIZ }
+};
+
+#define KEYS_MAX ((int)(sizeof(keys)/sizeof(keys[0])))
+
+static void mods(struct tbl_node *, struct tbl_cell *,
+ int, const char *, int *);
+static void cell(struct tbl_node *, struct tbl_row *,
+ int, const char *, int *);
+static struct tbl_cell *cell_alloc(struct tbl_node *, struct tbl_row *,
+ enum tbl_cellt);
+
+
+static void
+mods(struct tbl_node *tbl, struct tbl_cell *cp,
+ int ln, const char *p, int *pos)
+{
+ char *endptr;
+ size_t sz;
+
+mod:
+ while (p[*pos] == ' ' || p[*pos] == '\t')
+ (*pos)++;
+
+ /* Row delimiters and cell specifiers end modifier lists. */
+
+ if (strchr(".,-=^_ACLNRSaclnrs", p[*pos]) != NULL)
+ return;
+
+ /* Throw away parenthesised expression. */
+
+ if ('(' == p[*pos]) {
+ (*pos)++;
+ while (p[*pos] && ')' != p[*pos])
+ (*pos)++;
+ if (')' == p[*pos]) {
+ (*pos)++;
+ goto mod;
+ }
+ mandoc_msg(MANDOCERR_TBLLAYOUT_PAR, ln, *pos, NULL);
+ return;
+ }
+
+ /* Parse numerical spacing from modifier string. */
+
+ if (isdigit((unsigned char)p[*pos])) {
+ cp->spacing = strtoull(p + *pos, &endptr, 10);
+ *pos = endptr - p;
+ goto mod;
+ }
+
+ switch (tolower((unsigned char)p[(*pos)++])) {
+ case 'b':
+ cp->flags |= TBL_CELL_BOLD;
+ goto mod;
+ case 'd':
+ cp->flags |= TBL_CELL_BALIGN;
+ goto mod;
+ case 'e':
+ cp->flags |= TBL_CELL_EQUAL;
+ goto mod;
+ case 'f':
+ break;
+ case 'i':
+ cp->flags |= TBL_CELL_ITALIC;
+ goto mod;
+ case 'm':
+ mandoc_msg(MANDOCERR_TBLLAYOUT_MOD, ln, *pos, "m");
+ goto mod;
+ case 'p':
+ case 'v':
+ if (p[*pos] == '-' || p[*pos] == '+')
+ (*pos)++;
+ while (isdigit((unsigned char)p[*pos]))
+ (*pos)++;
+ goto mod;
+ case 't':
+ cp->flags |= TBL_CELL_TALIGN;
+ goto mod;
+ case 'u':
+ cp->flags |= TBL_CELL_UP;
+ goto mod;
+ case 'w':
+ sz = 0;
+ if (p[*pos] == '(') {
+ (*pos)++;
+ while (p[*pos + sz] != '\0' && p[*pos + sz] != ')')
+ sz++;
+ } else
+ while (isdigit((unsigned char)p[*pos + sz]))
+ sz++;
+ if (sz) {
+ free(cp->wstr);
+ cp->wstr = mandoc_strndup(p + *pos, sz);
+ *pos += sz;
+ if (p[*pos] == ')')
+ (*pos)++;
+ }
+ goto mod;
+ case 'x':
+ cp->flags |= TBL_CELL_WMAX;
+ goto mod;
+ case 'z':
+ cp->flags |= TBL_CELL_WIGN;
+ goto mod;
+ case '|':
+ if (cp->vert < 2)
+ cp->vert++;
+ else
+ mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
+ ln, *pos - 1, NULL);
+ goto mod;
+ default:
+ mandoc_msg(MANDOCERR_TBLLAYOUT_CHAR,
+ ln, *pos - 1, "%c", p[*pos - 1]);
+ goto mod;
+ }
+
+ /* Ignore parenthised font names for now. */
+
+ if (p[*pos] == '(')
+ goto mod;
+
+ /* Support only one-character font-names for now. */
+
+ if (p[*pos] == '\0' || (p[*pos + 1] != ' ' && p[*pos + 1] != '.')) {
+ mandoc_msg(MANDOCERR_FT_BAD,
+ ln, *pos, "TS %s", p + *pos - 1);
+ if (p[*pos] != '\0')
+ (*pos)++;
+ if (p[*pos] != '\0')
+ (*pos)++;
+ goto mod;
+ }
+
+ switch (p[(*pos)++]) {
+ case '3':
+ case 'B':
+ cp->flags |= TBL_CELL_BOLD;
+ goto mod;
+ case '2':
+ case 'I':
+ cp->flags |= TBL_CELL_ITALIC;
+ goto mod;
+ case '1':
+ case 'R':
+ goto mod;
+ default:
+ mandoc_msg(MANDOCERR_FT_BAD,
+ ln, *pos - 1, "TS f%c", p[*pos - 1]);
+ goto mod;
+ }
+}
+
+static void
+cell(struct tbl_node *tbl, struct tbl_row *rp,
+ int ln, const char *p, int *pos)
+{
+ int i;
+ enum tbl_cellt c;
+
+ /* Handle leading vertical lines */
+
+ while (p[*pos] == ' ' || p[*pos] == '\t' || p[*pos] == '|') {
+ if (p[*pos] == '|') {
+ if (rp->vert < 2)
+ rp->vert++;
+ else
+ mandoc_msg(MANDOCERR_TBLLAYOUT_VERT,
+ ln, *pos, NULL);
+ }
+ (*pos)++;
+ }
+
+again:
+ while (p[*pos] == ' ' || p[*pos] == '\t')
+ (*pos)++;
+
+ if (p[*pos] == '.' || p[*pos] == '\0')
+ return;
+
+ /* Parse the column position (`c', `l', `r', ...). */
+
+ for (i = 0; i < KEYS_MAX; i++)
+ if (tolower((unsigned char)p[*pos]) == keys[i].name)
+ break;
+
+ if (i == KEYS_MAX) {
+ mandoc_msg(MANDOCERR_TBLLAYOUT_CHAR,
+ ln, *pos, "%c", p[*pos]);
+ (*pos)++;
+ goto again;
+ }
+ c = keys[i].key;
+
+ /* Special cases of spanners. */
+
+ if (c == TBL_CELL_SPAN) {
+ if (rp->last == NULL)
+ mandoc_msg(MANDOCERR_TBLLAYOUT_SPAN, ln, *pos, NULL);
+ else if (rp->last->pos == TBL_CELL_HORIZ ||
+ rp->last->pos == TBL_CELL_DHORIZ)
+ c = rp->last->pos;
+ } else if (c == TBL_CELL_DOWN && rp == tbl->first_row)
+ mandoc_msg(MANDOCERR_TBLLAYOUT_DOWN, ln, *pos, NULL);
+
+ (*pos)++;
+
+ /* Allocate cell then parse its modifiers. */
+
+ mods(tbl, cell_alloc(tbl, rp, c), ln, p, pos);
+}
+
+void
+tbl_layout(struct tbl_node *tbl, int ln, const char *p, int pos)
+{
+ struct tbl_row *rp;
+
+ rp = NULL;
+ for (;;) {
+ /* Skip whitespace before and after each cell. */
+
+ while (p[pos] == ' ' || p[pos] == '\t')
+ pos++;
+
+ switch (p[pos]) {
+ case ',': /* Next row on this input line. */
+ pos++;
+ rp = NULL;
+ continue;
+ case '\0': /* Next row on next input line. */
+ return;
+ case '.': /* End of layout. */
+ pos++;
+ tbl->part = TBL_PART_DATA;
+
+ /*
+ * When the layout is completely empty,
+ * default to one left-justified column.
+ */
+
+ if (tbl->first_row == NULL) {
+ tbl->first_row = tbl->last_row =
+ mandoc_calloc(1, sizeof(*rp));
+ }
+ if (tbl->first_row->first == NULL) {
+ mandoc_msg(MANDOCERR_TBLLAYOUT_NONE,
+ ln, pos, NULL);
+ cell_alloc(tbl, tbl->first_row,
+ TBL_CELL_LEFT);
+ if (tbl->opts.lvert < tbl->first_row->vert)
+ tbl->opts.lvert = tbl->first_row->vert;
+ return;
+ }
+
+ /*
+ * Search for the widest line
+ * along the left and right margins.
+ */
+
+ for (rp = tbl->first_row; rp; rp = rp->next) {
+ if (tbl->opts.lvert < rp->vert)
+ tbl->opts.lvert = rp->vert;
+ if (rp->last != NULL &&
+ rp->last->col + 1 == tbl->opts.cols &&
+ tbl->opts.rvert < rp->last->vert)
+ tbl->opts.rvert = rp->last->vert;
+
+ /* If the last line is empty, drop it. */
+
+ if (rp->next != NULL &&
+ rp->next->first == NULL) {
+ free(rp->next);
+ rp->next = NULL;
+ tbl->last_row = rp;
+ }
+ }
+ return;
+ default: /* Cell. */
+ break;
+ }
+
+ /*
+ * If the last line had at least one cell,
+ * start a new one; otherwise, continue it.
+ */
+
+ if (rp == NULL) {
+ if (tbl->last_row == NULL ||
+ tbl->last_row->first != NULL) {
+ rp = mandoc_calloc(1, sizeof(*rp));
+ if (tbl->last_row)
+ tbl->last_row->next = rp;
+ else
+ tbl->first_row = rp;
+ tbl->last_row = rp;
+ } else
+ rp = tbl->last_row;
+ }
+ cell(tbl, rp, ln, p, &pos);
+ }
+}
+
+static struct tbl_cell *
+cell_alloc(struct tbl_node *tbl, struct tbl_row *rp, enum tbl_cellt pos)
+{
+ struct tbl_cell *p, *pp;
+
+ p = mandoc_calloc(1, sizeof(*p));
+ p->spacing = SIZE_MAX;
+ p->pos = pos;
+
+ if ((pp = rp->last) != NULL) {
+ pp->next = p;
+ p->col = pp->col + 1;
+ } else
+ rp->first = p;
+ rp->last = p;
+
+ if (tbl->opts.cols <= p->col)
+ tbl->opts.cols = p->col + 1;
+
+ return p;
+}