1 /*      $Id: tbl.c,v 1.26 2011/07/25 15:37:00 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2011 Ingo Schwarze <schwarze@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18 #ifdef HAVE_CONFIG_H
  19 #include "config.h"
  20 #endif
  21 
  22 #include <assert.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <time.h>
  27 
  28 #include "mandoc.h"
  29 #include "libmandoc.h"
  30 #include "libroff.h"
  31 
  32 enum rofferr
  33 tbl_read(struct tbl_node *tbl, int ln, const char *p, int offs)
  34 {
  35         int              len;
  36         const char      *cp;
  37 
  38         cp = &p[offs];
  39         len = (int)strlen(cp);
  40 
  41         /*
  42          * If we're in the options section and we don't have a
  43          * terminating semicolon, assume we've moved directly into the
  44          * layout section.  No need to report a warning: this is,
  45          * apparently, standard behaviour.
  46          */
  47 
  48         if (TBL_PART_OPTS == tbl->part && len)
  49                 if (';' != cp[len - 1])
  50                         tbl->part = TBL_PART_LAYOUT;
  51 
  52         /* Now process each logical section of the table.  */
  53 
  54         switch (tbl->part) {
  55         case (TBL_PART_OPTS):
  56                 return(tbl_option(tbl, ln, p) ? ROFF_IGN : ROFF_ERR);
  57         case (TBL_PART_LAYOUT):
  58                 return(tbl_layout(tbl, ln, p) ? ROFF_IGN : ROFF_ERR);
  59         case (TBL_PART_CDATA):
  60                 return(tbl_cdata(tbl, ln, p) ? ROFF_TBL : ROFF_IGN);
  61         default:
  62                 break;
  63         }
  64 
  65         /*
  66          * This only returns zero if the line is empty, so we ignore it
  67          * and continue on.
  68          */
  69         return(tbl_data(tbl, ln, p) ? ROFF_TBL : ROFF_IGN);
  70 }
  71 
  72 struct tbl_node *
  73 tbl_alloc(int pos, int line, struct mparse *parse)
  74 {
  75         struct tbl_node *p;
  76 
  77         p = mandoc_calloc(1, sizeof(struct tbl_node));
  78         p->line = line;
  79         p->pos = pos;
  80         p->parse = parse;
  81         p->part = TBL_PART_OPTS;
  82         p->opts.tab = '\t';
  83         p->opts.linesize = 12;
  84         p->opts.decimal = '.';
  85         return(p);
  86 }
  87 
  88 void
  89 tbl_free(struct tbl_node *p)
  90 {
  91         struct tbl_row  *rp;
  92         struct tbl_cell *cp;
  93         struct tbl_span *sp;
  94         struct tbl_dat  *dp;
  95         struct tbl_head *hp;
  96 
  97         while (NULL != (rp = p->first_row)) {
  98                 p->first_row = rp->next;
  99                 while (rp->first) {
 100                         cp = rp->first;
 101                         rp->first = cp->next;
 102                         free(cp);
 103                 }
 104                 free(rp);
 105         }
 106 
 107         while (NULL != (sp = p->first_span)) {
 108                 p->first_span = sp->next;
 109                 while (sp->first) {
 110                         dp = sp->first;
 111                         sp->first = dp->next;
 112                         if (dp->string)
 113                                 free(dp->string);
 114                         free(dp);
 115                 }
 116                 free(sp);
 117         }
 118 
 119         while (NULL != (hp = p->first_head)) {
 120                 p->first_head = hp->next;
 121                 free(hp);
 122         }
 123 
 124         free(p);
 125 }
 126 
 127 void
 128 tbl_restart(int line, int pos, struct tbl_node *tbl)
 129 {
 130         if (TBL_PART_CDATA == tbl->part)
 131                 mandoc_msg(MANDOCERR_TBLBLOCK, tbl->parse, 
 132                                 tbl->line, tbl->pos, NULL);
 133 
 134         tbl->part = TBL_PART_LAYOUT;
 135         tbl->line = line;
 136         tbl->pos = pos;
 137 
 138         if (NULL == tbl->first_span || NULL == tbl->first_span->first)
 139                 mandoc_msg(MANDOCERR_TBLNODATA, tbl->parse,
 140                                 tbl->line, tbl->pos, NULL);
 141 }
 142 
 143 const struct tbl_span *
 144 tbl_span(struct tbl_node *tbl)
 145 {
 146         struct tbl_span  *span;
 147 
 148         assert(tbl);
 149         span = tbl->current_span ? tbl->current_span->next
 150                                  : tbl->first_span;
 151         if (span)
 152                 tbl->current_span = span;
 153         return(span);
 154 }
 155 
 156 void
 157 tbl_end(struct tbl_node **tblp)
 158 {
 159         struct tbl_node *tbl;
 160 
 161         tbl = *tblp;
 162         *tblp = NULL;
 163 
 164         if (NULL == tbl->first_span || NULL == tbl->first_span->first)
 165                 mandoc_msg(MANDOCERR_TBLNODATA, tbl->parse, 
 166                                 tbl->line, tbl->pos, NULL);
 167 
 168         if (tbl->last_span)
 169                 tbl->last_span->flags |= TBL_SPAN_LAST;
 170 
 171         if (TBL_PART_CDATA == tbl->part)
 172                 mandoc_msg(MANDOCERR_TBLBLOCK, tbl->parse, 
 173                                 tbl->line, tbl->pos, NULL);
 174 }
 175