usr/src/cmd/mandoc/tbl_data.c

   1 /*      $Id: tbl_data.c,v 1.39 2015/01/30 17:32:16 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
   4  * Copyright (c) 2011, 2015 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 #include "config.h"
  19
  20 #include <sys/types.h>
  21
  22 #include <assert.h>
  23 #include <ctype.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <time.h>
  27
  28 #include "mandoc.h"
  29 #include "mandoc_aux.h"
  30 #include "libmandoc.h"
  31 #include "libroff.h"
  32
  33 static  void             getdata(struct tbl_node *, struct tbl_span *,
  34                                 int, const char *, int *);
  35 static  struct tbl_span *newspan(struct tbl_node *, int,
  36                                 struct tbl_row *);
  37
  38
  39 static void
  40 getdata(struct tbl_node *tbl, struct tbl_span *dp,
  41                 int ln, const char *p, int *pos)
  42 {
  43         struct tbl_dat  *dat;
  44         struct tbl_cell *cp;
  45         int              sv;
  46
  47         /* Advance to the next layout cell, skipping spanners. */
  48
  49         cp = dp->last == NULL ? dp->layout->first : dp->last->layout->next;
  50         while (cp != NULL && cp->pos == TBL_CELL_SPAN)
  51                 cp = cp->next;
  52
  53         /*
  54          * Stop processing when we reach the end of the available layout
  55          * cells.  This means that we have extra input.
  56          */
  57
  58         if (cp == NULL) {
  59                 mandoc_msg(MANDOCERR_TBLDATA_EXTRA, tbl->parse,
  60                     ln, *pos, p + *pos);
  61                 /* Skip to the end... */
  62                 while (p[*pos])
  63                         (*pos)++;
  64                 return;
  65         }
  66
  67         dat = mandoc_calloc(1, sizeof(*dat));
  68         dat->layout = cp;
  69         dat->pos = TBL_DATA_NONE;
  70         dat->spans = 0;
  71         for (cp = cp->next; cp != NULL; cp = cp->next)
  72                 if (cp->pos == TBL_CELL_SPAN)
  73                         dat->spans++;
  74                 else
  75                         break;
  76
  77         if (dp->last == NULL)
  78                 dp->first = dat;
  79         else
  80                 dp->last->next = dat;
  81         dp->last = dat;
  82
  83         sv = *pos;
  84         while (p[*pos] && p[*pos] != tbl->opts.tab)
  85                 (*pos)++;
  86
  87         /*
  88          * Check for a continued-data scope opening.  This consists of a
  89          * trailing `T{' at the end of the line.  Subsequent lines,
  90          * until a standalone `T}', are included in our cell.
  91          */
  92
  93         if (*pos - sv == 2 && p[sv] == 'T' && p[sv + 1] == '{') {
  94                 tbl->part = TBL_PART_CDATA;
  95                 return;
  96         }
  97
  98         dat->string = mandoc_strndup(p + sv, *pos - sv);
  99
 100         if (p[*pos])
 101                 (*pos)++;
 102
 103         if ( ! strcmp(dat->string, "_"))
 104                 dat->pos = TBL_DATA_HORIZ;
 105         else if ( ! strcmp(dat->string, "="))
 106                 dat->pos = TBL_DATA_DHORIZ;
 107         else if ( ! strcmp(dat->string, "\\_"))
 108                 dat->pos = TBL_DATA_NHORIZ;
 109         else if ( ! strcmp(dat->string, "\\="))
 110                 dat->pos = TBL_DATA_NDHORIZ;
 111         else
 112                 dat->pos = TBL_DATA_DATA;
 113
 114         if ((dat->layout->pos == TBL_CELL_HORIZ ||
 115             dat->layout->pos == TBL_CELL_DHORIZ ||
 116             dat->layout->pos == TBL_CELL_DOWN) &&
 117             dat->pos == TBL_DATA_DATA && *dat->string != '\0')
 118                 mandoc_msg(MANDOCERR_TBLDATA_SPAN,
 119                     tbl->parse, ln, sv, dat->string);
 120 }
 121
 122 int
 123 tbl_cdata(struct tbl_node *tbl, int ln, const char *p, int pos)
 124 {
 125         struct tbl_dat  *dat;
 126         size_t           sz;
 127
 128         dat = tbl->last_span->last;
 129
 130         if (p[pos] == 'T' && p[pos + 1] == '}') {
 131                 pos += 2;
 132                 if (p[pos] == tbl->opts.tab) {
 133                         tbl->part = TBL_PART_DATA;
 134                         pos++;
 135                         getdata(tbl, tbl->last_span, ln, p, &pos);
 136                         return(1);
 137                 } else if (p[pos] == '\0') {
 138                         tbl->part = TBL_PART_DATA;
 139                         return(1);
 140                 }
 141
 142                 /* Fallthrough: T} is part of a word. */
 143         }
 144
 145         dat->pos = TBL_DATA_DATA;
 146
 147         if (dat->string != NULL) {
 148                 sz = strlen(p + pos) + strlen(dat->string) + 2;
 149                 dat->string = mandoc_realloc(dat->string, sz);
 150                 (void)strlcat(dat->string, " ", sz);
 151                 (void)strlcat(dat->string, p + pos, sz);
 152         } else
 153                 dat->string = mandoc_strdup(p + pos);
 154
 155         if (dat->layout->pos == TBL_CELL_DOWN)
 156                 mandoc_msg(MANDOCERR_TBLDATA_SPAN, tbl->parse,
 157                     ln, pos, dat->string);
 158
 159         return(0);
 160 }
 161
 162 static struct tbl_span *
 163 newspan(struct tbl_node *tbl, int line, struct tbl_row *rp)
 164 {
 165         struct tbl_span *dp;
 166
 167         dp = mandoc_calloc(1, sizeof(*dp));
 168         dp->line = line;
 169         dp->opts = &tbl->opts;
 170         dp->layout = rp;
 171         dp->prev = tbl->last_span;
 172
 173         if (dp->prev == NULL) {
 174                 tbl->first_span = dp;
 175                 tbl->current_span = NULL;
 176         } else
 177                 dp->prev->next = dp;
 178         tbl->last_span = dp;
 179
 180         return(dp);
 181 }
 182
 183 void
 184 tbl_data(struct tbl_node *tbl, int ln, const char *p, int pos)
 185 {
 186         struct tbl_span *dp;
 187         struct tbl_row  *rp;
 188
 189         /*
 190          * Choose a layout row: take the one following the last parsed
 191          * span's.  If that doesn't exist, use the last parsed span's.
 192          * If there's no last parsed span, use the first row.  Lastly,
 193          * if the last span was a horizontal line, use the same layout
 194          * (it doesn't "consume" the layout).
 195          */
 196
 197         if (tbl->last_span != NULL) {
 198                 if (tbl->last_span->pos == TBL_SPAN_DATA) {
 199                         for (rp = tbl->last_span->layout->next;
 200                              rp != NULL && rp->first != NULL;
 201                              rp = rp->next) {
 202                                 switch (rp->first->pos) {
 203                                 case TBL_CELL_HORIZ:
 204                                         dp = newspan(tbl, ln, rp);
 205                                         dp->pos = TBL_SPAN_HORIZ;
 206                                         continue;
 207                                 case TBL_CELL_DHORIZ:
 208                                         dp = newspan(tbl, ln, rp);
 209                                         dp->pos = TBL_SPAN_DHORIZ;
 210                                         continue;
 211                                 default:
 212                                         break;
 213                                 }
 214                                 break;
 215                         }
 216                 } else
 217                         rp = tbl->last_span->layout;
 218
 219                 if (rp == NULL)
 220                         rp = tbl->last_span->layout;
 221         } else
 222                 rp = tbl->first_row;
 223
 224         assert(rp);
 225
 226         dp = newspan(tbl, ln, rp);
 227
 228         if ( ! strcmp(p, "_")) {
 229                 dp->pos = TBL_SPAN_HORIZ;
 230                 return;
 231         } else if ( ! strcmp(p, "=")) {
 232                 dp->pos = TBL_SPAN_DHORIZ;
 233                 return;
 234         }
 235
 236         dp->pos = TBL_SPAN_DATA;
 237
 238         while (p[pos] != '\0')
 239                 getdata(tbl, dp, ln, p, &pos);
 240 }