cmd/mandoc/tbl.c

/*  $Id: tbl.c,v 1.40 2015/10/06 18:32:20 schwarze Exp $ */
/*
 * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2011, 2015 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 "config.h"

#include <sys/types.h>

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "mandoc.h"
#include "mandoc_aux.h"
#include "libmandoc.h"
#include "libroff.h"


enum rofferr
tbl_read(struct tbl_node *tbl, int ln, const char *p, int pos)
{
    const char  *cp;
    int      active;

    /*
     * In the options section, proceed to the layout section
     * after a semicolon, or right away if there is no semicolon.
     * Ignore semicolons in arguments.
     */

    if (tbl->part == TBL_PART_OPTS) {
        tbl->part = TBL_PART_LAYOUT;
        active = 1;
        for (cp = p + pos; *cp != '\0'; cp++) {
            switch (*cp) {
            case '(':
                active = 0;
                continue;
            case ')':
                active = 1;
                continue;
            case ';':
                if (active)
                    break;
                continue;
            default:
                continue;
            }
            break;
        }
        if (*cp == ';') {
            tbl_option(tbl, ln, p, &pos);
            if (p[pos] == '\0')
                return ROFF_IGN;
        }
    }

    /* Process the other section types.  */

    switch (tbl->part) {
    case TBL_PART_LAYOUT:
        tbl_layout(tbl, ln, p, pos);
        return ROFF_IGN;
    case TBL_PART_CDATA:
        return tbl_cdata(tbl, ln, p, pos) ? ROFF_TBL : ROFF_IGN;
    default:
        break;
    }

    tbl_data(tbl, ln, p, pos);
    return ROFF_TBL;
}

struct tbl_node *
tbl_alloc(int pos, int line, struct mparse *parse)
{
    struct tbl_node *tbl;

    tbl = mandoc_calloc(1, sizeof(*tbl));
    tbl->line = line;
    tbl->pos = pos;
    tbl->parse = parse;
    tbl->part = TBL_PART_OPTS;
    tbl->opts.tab = '\t';
    tbl->opts.decimal = '.';
    return tbl;
}

void
tbl_free(struct tbl_node *tbl)
{
    struct tbl_row  *rp;
    struct tbl_cell *cp;
    struct tbl_span *sp;
    struct tbl_dat  *dp;

    while ((rp = tbl->first_row) != NULL) {
        tbl->first_row = rp->next;
        while (rp->first != NULL) {
            cp = rp->first;
            rp->first = cp->next;
            free(cp);
        }
        free(rp);
    }

    while ((sp = tbl->first_span) != NULL) {
        tbl->first_span = sp->next;
        while (sp->first != NULL) {
            dp = sp->first;
            sp->first = dp->next;
            free(dp->string);
            free(dp);
        }
        free(sp);
    }

    free(tbl);
}

void
tbl_restart(int line, int pos, struct tbl_node *tbl)
{
    if (tbl->part == TBL_PART_CDATA)
        mandoc_msg(MANDOCERR_TBLDATA_BLK, tbl->parse,
            line, pos, "T&");

    tbl->part = TBL_PART_LAYOUT;
    tbl->line = line;
    tbl->pos = pos;
}

const struct tbl_span *
tbl_span(struct tbl_node *tbl)
{
    struct tbl_span  *span;

    assert(tbl);
    span = tbl->current_span ? tbl->current_span->next
                 : tbl->first_span;
    if (span)
        tbl->current_span = span;
    return span;
}

int
tbl_end(struct tbl_node **tblp)
{
    struct tbl_node *tbl;
    struct tbl_span *sp;

    tbl = *tblp;
    *tblp = NULL;

    if (tbl->part == TBL_PART_CDATA)
        mandoc_msg(MANDOCERR_TBLDATA_BLK, tbl->parse,
            tbl->line, tbl->pos, "TE");

    sp = tbl->first_span;
    while (sp != NULL && sp->first == NULL)
        sp = sp->next;
    if (sp == NULL) {
        mandoc_msg(MANDOCERR_TBLDATA_NONE, tbl->parse,
            tbl->line, tbl->pos, NULL);
        return 0;
    }
    return 1;
}