tbl_data.c

   1 /*      $Id: tbl_data.c,v 1.16 2011/01/10 14:40:30 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, spans;
  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         /*
  59          * Stop processing when we reach the end of the available layout
  60          * cells.  This means that we have extra input.
  61          */
  62
  63         if (NULL == cp) {
  64                 TBL_MSG(tbl, MANDOCERR_TBLEXTRADAT, ln, *pos);
  65                 /* Skip to the end... */
  66                 while (p[*pos])
  67                         (*pos)++;
  68                 return(1);
  69         }
  70
  71         dat = mandoc_calloc(1, sizeof(struct tbl_dat));
  72         dat->layout = cp;
  73         dat->pos = TBL_DATA_NONE;
  74
  75         assert(TBL_CELL_SPAN != cp->pos);
  76
  77         for (spans = 0, cp = cp->next; cp; cp = cp->next)
  78                 if (TBL_CELL_SPAN == cp->pos)
  79                         spans++;
  80                 else
  81                         break;
  82
  83         dat->spans = spans;
  84
  85         if (dp->last) {
  86                 dp->last->next = dat;
  87                 dp->last = dat;
  88         } else
  89                 dp->last = dp->first = dat;
  90
  91         sv = *pos;
  92         while (p[*pos] && p[*pos] != tbl->opts.tab)
  93                 (*pos)++;
  94
  95         /*
  96          * Check for a continued-data scope opening.  This consists of a
  97          * trailing `T{' at the end of the line.  Subsequent lines,
  98          * until a standalone `T}', are included in our cell.
  99          */
 100
 101         if (*pos - sv == 2 && 'T' == p[sv] && '{' == p[sv + 1]) {
 102                 tbl->part = TBL_PART_CDATA;
 103                 return(0);
 104         }
 105
 106         dat->string = mandoc_malloc(*pos - sv + 1);
 107         memcpy(dat->string, &p[sv], *pos - sv);
 108         dat->string[*pos - sv] = '\0';
 109
 110         if (p[*pos])
 111                 (*pos)++;
 112
 113         if ( ! strcmp(dat->string, "_"))
 114                 dat->pos = TBL_DATA_HORIZ;
 115         else if ( ! strcmp(dat->string, "="))
 116                 dat->pos = TBL_DATA_DHORIZ;
 117         else if ( ! strcmp(dat->string, "\\_"))
 118                 dat->pos = TBL_DATA_NHORIZ;
 119         else if ( ! strcmp(dat->string, "\\="))
 120                 dat->pos = TBL_DATA_NDHORIZ;
 121         else
 122                 dat->pos = TBL_DATA_DATA;
 123
 124         if (TBL_CELL_HORIZ == dat->layout->pos ||
 125                         TBL_CELL_DHORIZ == dat->layout->pos)
 126                 if (TBL_DATA_DATA == dat->pos && '\0' != *dat->string)
 127                         TBL_MSG(tbl, MANDOCERR_TBLIGNDATA, ln, sv);
 128
 129         return(1);
 130 }
 131
 132 /* ARGSUSED */
 133 int
 134 tbl_cdata(struct tbl_node *tbl, int ln, const char *p)
 135 {
 136         struct tbl_dat  *dat;
 137         size_t           sz;
 138         int              pos;
 139
 140         pos = 0;
 141
 142         dat = tbl->last_span->last;
 143         dat->pos = TBL_DATA_DATA;
 144
 145         if (p[pos] == 'T' && p[pos + 1] == '}') {
 146                 pos += 2;
 147                 if (p[pos] == tbl->opts.tab) {
 148                         tbl->part = TBL_PART_DATA;
 149                         pos++;
 150                         return(data(tbl, tbl->last_span, ln, p, &pos));
 151                 } else if ('\0' == p[pos]) {
 152                         tbl->part = TBL_PART_DATA;
 153                         return(1);
 154                 }
 155
 156                 /* Fallthrough: T} is part of a word. */
 157         }
 158
 159         if (dat->string) {
 160                 sz = strlen(p) + strlen(dat->string) + 2;
 161                 dat->string = mandoc_realloc(dat->string, sz);
 162                 strlcat(dat->string, " ", sz);
 163                 strlcat(dat->string, p, sz);
 164         } else
 165                 dat->string = mandoc_strdup(p);
 166
 167         return(0);
 168 }
 169
 170 int
 171 tbl_data(struct tbl_node *tbl, int ln, const char *p)
 172 {
 173         struct tbl_span *dp;
 174         struct tbl_row  *rp;
 175         int              pos;
 176
 177         pos = 0;
 178
 179         if ('\0' == p[pos]) {
 180                 TBL_MSG(tbl, MANDOCERR_TBL, ln, pos);
 181                 return(0);
 182         }
 183
 184         /*
 185          * Choose a layout row: take the one following the last parsed
 186          * span's.  If that doesn't exist, use the last parsed span's.
 187          * If there's no last parsed span, use the first row.  Lastly,
 188          * if the last span was a horizontal line, use the same layout
 189          * (it doesn't "consume" the layout).
 190          *
 191          * In the end, this can be NULL!
 192          */
 193
 194         if (tbl->last_span) {
 195                 assert(tbl->last_span->layout);
 196                 if (tbl->last_span->pos == TBL_SPAN_DATA)
 197                         rp = tbl->last_span->layout->next;
 198                 else
 199                         rp = tbl->last_span->layout;
 200                 if (NULL == rp)
 201                         rp = tbl->last_span->layout;
 202         } else
 203                 rp = tbl->first_row;
 204
 205         dp = mandoc_calloc(1, sizeof(struct tbl_span));
 206         dp->tbl = &tbl->opts;
 207         dp->layout = rp;
 208         dp->head = tbl->first_head;
 209
 210         if (tbl->last_span) {
 211                 tbl->last_span->next = dp;
 212                 tbl->last_span = dp;
 213         } else {
 214                 tbl->last_span = tbl->first_span = dp;
 215                 dp->flags |= TBL_SPAN_FIRST;
 216         }
 217
 218         if ( ! strcmp(p, "_")) {
 219                 dp->pos = TBL_SPAN_HORIZ;
 220                 return(1);
 221         } else if ( ! strcmp(p, "=")) {
 222                 dp->pos = TBL_SPAN_DHORIZ;
 223                 return(1);
 224         }
 225
 226         dp->pos = TBL_SPAN_DATA;
 227
 228         /* This returns 0 when TBL_PART_CDATA is entered. */
 229
 230         while ('\0' != p[pos])
 231                 if ( ! data(tbl, dp, ln, p, &pos))
 232                         return(0);
 233
 234         return(1);
 235 }