tbl_data.c

   1 /*      $Id: tbl_data.c,v 1.14 2011/01/07 14:59:52 kristaps Exp $ */
   2 /*
   3  * Copyright (c) 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17 #ifdef HAVE_CONFIG_H
  18 #include "config.h"
  19 #endif
  20
  21 #include <assert.h>
  22 #include <ctype.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <time.h>
  26
  27 #include "mandoc.h"
  28 #include "libmandoc.h"
  29 #include "libroff.h"
  30
  31 static  int     data(struct tbl_node *, struct tbl_span *,
  32                         int, const char *, int *);
  33
  34 static int
  35 data(struct tbl_node *tbl, struct tbl_span *dp,
  36                 int ln, const char *p, int *pos)
  37 {
  38         struct tbl_dat  *dat;
  39         struct tbl_cell *cp;
  40         int              sv;
  41
  42         cp = NULL;
  43         if (dp->last && dp->last->layout)
  44                 cp = dp->last->layout->next;
  45         else if (NULL == dp->last)
  46                 cp = dp->layout->first;
  47
  48         /*
  49          * Skip over spanners and vertical lines to data formats, since
  50          * we want to match data with data layout cells in the header.
  51          */
  52
  53         while (cp && (TBL_CELL_VERT == cp->pos ||
  54                                 TBL_CELL_DVERT == cp->pos ||
  55                                 TBL_CELL_SPAN == cp->pos))
  56                 cp = cp->next;
  57
  58         dat = mandoc_calloc(1, sizeof(struct tbl_dat));
  59         dat->layout = cp;
  60         dat->pos = TBL_DATA_NONE;
  61
  62         if (NULL == dat->layout)
  63                 TBL_MSG(tbl, MANDOCERR_TBLEXTRADAT, ln, *pos);
  64
  65         if (dp->last) {
  66                 dp->last->next = dat;
  67                 dp->last = dat;
  68         } else
  69                 dp->last = dp->first = dat;
  70
  71         sv = *pos;
  72         while (p[*pos] && p[*pos] != tbl->opts.tab)
  73                 (*pos)++;
  74
  75         /*
  76          * Check for a continued-data scope opening.  This consists of a
  77          * trailing `T{' at the end of the line.  Subsequent lines,
  78          * until a standalone `T}', are included in our cell.
  79          */
  80
  81         if (*pos - sv == 2 && 'T' == p[sv] && '{' == p[sv + 1]) {
  82                 tbl->part = TBL_PART_CDATA;
  83                 return(0);
  84         }
  85
  86         dat->string = mandoc_malloc(*pos - sv + 1);
  87         memcpy(dat->string, &p[sv], *pos - sv);
  88         dat->string[*pos - sv] = '\0';
  89
  90         if (p[*pos])
  91                 (*pos)++;
  92
  93         if ( ! strcmp(dat->string, "_"))
  94                 dat->pos = TBL_DATA_HORIZ;
  95         else if ( ! strcmp(dat->string, "="))
  96                 dat->pos = TBL_DATA_DHORIZ;
  97         else if ( ! strcmp(dat->string, "\\_"))
  98                 dat->pos = TBL_DATA_NHORIZ;
  99         else if ( ! strcmp(dat->string, "\\="))
 100                 dat->pos = TBL_DATA_NDHORIZ;
 101         else
 102                 dat->pos = TBL_DATA_DATA;
 103
 104         if (NULL == dat->layout)
 105                 return(1);
 106
 107         if (TBL_CELL_HORIZ == dat->layout->pos ||
 108                         TBL_CELL_DHORIZ == dat->layout->pos)
 109                 if (TBL_DATA_DATA == dat->pos && '\0' != *dat->string)
 110                         TBL_MSG(tbl, MANDOCERR_TBLIGNDATA, ln, sv);
 111
 112         return(1);
 113 }
 114
 115 /* ARGSUSED */
 116 int
 117 tbl_cdata(struct tbl_node *tbl, int ln, const char *p)
 118 {
 119         struct tbl_dat  *dat;
 120         size_t           sz;
 121         int              pos;
 122
 123         pos = 0;
 124
 125         dat = tbl->last_span->last;
 126         dat->pos = TBL_DATA_DATA;
 127
 128         if (p[pos] == 'T' && p[pos + 1] == '}') {
 129                 pos += 2;
 130                 if (p[pos] == tbl->opts.tab) {
 131                         tbl->part = TBL_PART_DATA;
 132                         pos++;
 133                         return(data(tbl, tbl->last_span, ln, p, &pos));
 134                 } else if ('\0' == p[pos]) {
 135                         tbl->part = TBL_PART_DATA;
 136                         return(1);
 137                 }
 138
 139                 /* Fallthrough: T} is part of a word. */
 140         }
 141
 142         if (dat->string) {
 143                 sz = strlen(p) + strlen(dat->string) + 2;
 144                 dat->string = mandoc_realloc(dat->string, sz);
 145                 strlcat(dat->string, " ", sz);
 146                 strlcat(dat->string, p, sz);
 147         } else
 148                 dat->string = mandoc_strdup(p);
 149
 150         return(0);
 151 }
 152
 153 int
 154 tbl_data(struct tbl_node *tbl, int ln, const char *p)
 155 {
 156         struct tbl_span *dp;
 157         struct tbl_row  *rp;
 158         int              pos;
 159
 160         pos = 0;
 161
 162         if ('\0' == p[pos]) {
 163                 TBL_MSG(tbl, MANDOCERR_TBL, ln, pos);
 164                 return(0);
 165         }
 166
 167         /*
 168          * Choose a layout row: take the one following the last parsed
 169          * span's.  If that doesn't exist, use the last parsed span's.
 170          * If there's no last parsed span, use the first row.  This can
 171          * be NULL!
 172          */
 173
 174         if (tbl->last_span) {
 175                 assert(tbl->last_span->layout);
 176                 rp = tbl->last_span->layout->next;
 177                 if (NULL == rp)
 178                         rp = tbl->last_span->layout;
 179         } else
 180                 rp = tbl->first_row;
 181
 182         dp = mandoc_calloc(1, sizeof(struct tbl_span));
 183         dp->tbl = &tbl->opts;
 184         dp->layout = rp;
 185         dp->head = tbl->first_head;
 186
 187         if (tbl->last_span) {
 188                 tbl->last_span->next = dp;
 189                 tbl->last_span = dp;
 190         } else {
 191                 tbl->last_span = tbl->first_span = dp;
 192                 dp->flags |= TBL_SPAN_FIRST;
 193         }
 194
 195         if ( ! strcmp(p, "_")) {
 196                 dp->pos = TBL_SPAN_HORIZ;
 197                 return(1);
 198         } else if ( ! strcmp(p, "=")) {
 199                 dp->pos = TBL_SPAN_DHORIZ;
 200                 return(1);
 201         }
 202
 203         dp->pos = TBL_SPAN_DATA;
 204
 205         /* This returns 0 when TBL_PART_CDATA is entered. */
 206
 207         while ('\0' != p[pos])
 208                 if ( ! data(tbl, dp, ln, p, &pos))
 209                         return(0);
 210
 211         return(1);
 212 }