cmd/mandoc/tbl.c

	tbl.c revision 95c635efb7c3b86efc493e0447eaec7aecca3f0f
/*  $Id: tbl.c,v 1.26 2011/07/25 15:37:00 kristaps Exp $ */
/*
 * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
 * Copyright (c) 2011 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.
 */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

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

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

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

    cp = &p[offs];
    len = (int)strlen(cp);

    /*
     * If we're in the options section and we don't have a
     * terminating semicolon, assume we've moved directly into the
     * layout section.  No need to report a warning: this is,
     * apparently, standard behaviour.
     */

    if (TBL_PART_OPTS == tbl->part && len)
        if (';' != cp[len - 1])
            tbl->part = TBL_PART_LAYOUT;

    /* Now process each logical section of the table.  */

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

    /*
     * This only returns zero if the line is empty, so we ignore it
     * and continue on.
     */
    return(tbl_data(tbl, ln, p) ? ROFF_TBL : ROFF_IGN);
}

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

    p = mandoc_calloc(1, sizeof(struct tbl_node));
    p->line = line;
    p->pos = pos;
    p->parse = parse;
    p->part = TBL_PART_OPTS;
    p->opts.tab = '\t';
    p->opts.linesize = 12;
    p->opts.decimal = '.';
    return(p);
}

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

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

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

    while (NULL != (hp = p->first_head)) {
        p->first_head = hp->next;
        free(hp);
    }

    free(p);
}

void
tbl_restart(int line, int pos, struct tbl_node *tbl)
{
    if (TBL_PART_CDATA == tbl->part)
        mandoc_msg(MANDOCERR_TBLBLOCK, tbl->parse,
                tbl->line, tbl->pos, NULL);

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

    if (NULL == tbl->first_span || NULL == tbl->first_span->first)
        mandoc_msg(MANDOCERR_TBLNODATA, tbl->parse,
                tbl->line, tbl->pos, NULL);
}

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);
}

void
tbl_end(struct tbl_node **tblp)
{
    struct tbl_node *tbl;

    tbl = *tblp;
    *tblp = NULL;

    if (NULL == tbl->first_span || NULL == tbl->first_span->first)
        mandoc_msg(MANDOCERR_TBLNODATA, tbl->parse,
                tbl->line, tbl->pos, NULL);

    if (tbl->last_span)
        tbl->last_span->flags |= TBL_SPAN_LAST;

    if (TBL_PART_CDATA == tbl->part)
        mandoc_msg(MANDOCERR_TBLBLOCK, tbl->parse,
                tbl->line, tbl->pos, NULL);
}