1 /* $Id: tbl_data.c,v 1.27 2013/06/01 04:56:50 schwarze 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 <ctype.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 static int data(struct tbl_node *, struct tbl_span *,
33 int, const char *, int *);
34 static struct tbl_span *newspan(struct tbl_node *, int,
35 struct tbl_row *);
36
37 static int
38 data(struct tbl_node *tbl, struct tbl_span *dp,
39 int ln, const char *p, int *pos)
40 {
41 struct tbl_dat *dat;
42 struct tbl_cell *cp;
43 int sv, spans;
44
45 cp = NULL;
46 if (dp->last && dp->last->layout)
47 cp = dp->last->layout->next;
48 else if (NULL == dp->last)
49 cp = dp->layout->first;
50
51 /*
52 * Skip over spanners, since
53 * we want to match data with data layout cells in the header.
54 */
55
56 while (cp && TBL_CELL_SPAN == cp->pos)
57 cp = cp->next;
58
59 /*
60 * Stop processing when we reach the end of the available layout
61 * cells. This means that we have extra input.
62 */
63
64 if (NULL == cp) {
65 mandoc_msg(MANDOCERR_TBLEXTRADAT,
66 tbl->parse, ln, *pos, NULL);
67 /* Skip to the end... */
68 while (p[*pos])
69 (*pos)++;
70 return(1);
71 }
72
73 dat = mandoc_calloc(1, sizeof(struct tbl_dat));
74 dat->layout = cp;
75 dat->pos = TBL_DATA_NONE;
76
77 assert(TBL_CELL_SPAN != cp->pos);
78
79 for (spans = 0, cp = cp->next; cp; cp = cp->next)
80 if (TBL_CELL_SPAN == cp->pos)
81 spans++;
82 else
83 break;
84
85 dat->spans = spans;
86
87 if (dp->last) {
88 dp->last->next = dat;
89 dp->last = dat;
90 } else
91 dp->last = dp->first = dat;
92
93 sv = *pos;
94 while (p[*pos] && p[*pos] != tbl->opts.tab)
95 (*pos)++;
96
97 /*
98 * Check for a continued-data scope opening. This consists of a
99 * trailing `T{' at the end of the line. Subsequent lines,
100 * until a standalone `T}', are included in our cell.
101 */
102
103 if (*pos - sv == 2 && 'T' == p[sv] && '{' == p[sv + 1]) {
104 tbl->part = TBL_PART_CDATA;
105 return(1);
106 }
107
108 assert(*pos - sv >= 0);
109
110 dat->string = mandoc_malloc((size_t)(*pos - sv + 1));
111 memcpy(dat->string, &p[sv], (size_t)(*pos - sv));
112 dat->string[*pos - sv] = '\0';
113
114 if (p[*pos])
115 (*pos)++;
116
117 if ( ! strcmp(dat->string, "_"))
118 dat->pos = TBL_DATA_HORIZ;
119 else if ( ! strcmp(dat->string, "="))
120 dat->pos = TBL_DATA_DHORIZ;
121 else if ( ! strcmp(dat->string, "\\_"))
122 dat->pos = TBL_DATA_NHORIZ;
123 else if ( ! strcmp(dat->string, "\\="))
124 dat->pos = TBL_DATA_NDHORIZ;
125 else
126 dat->pos = TBL_DATA_DATA;
127
128 if (TBL_CELL_HORIZ == dat->layout->pos ||
129 TBL_CELL_DHORIZ == dat->layout->pos ||
130 TBL_CELL_DOWN == dat->layout->pos)
131 if (TBL_DATA_DATA == dat->pos && '\0' != *dat->string)
132 mandoc_msg(MANDOCERR_TBLIGNDATA,
133 tbl->parse, ln, sv, NULL);
134
135 return(1);
136 }
137
138 /* ARGSUSED */
139 int
140 tbl_cdata(struct tbl_node *tbl, int ln, const char *p)
141 {
142 struct tbl_dat *dat;
143 size_t sz;
144 int pos;
145
146 pos = 0;
147
148 dat = tbl->last_span->last;
149
150 if (p[pos] == 'T' && p[pos + 1] == '}') {
151 pos += 2;
152 if (p[pos] == tbl->opts.tab) {
153 tbl->part = TBL_PART_DATA;
154 pos++;
155 return(data(tbl, tbl->last_span, ln, p, &pos));
156 } else if ('\0' == p[pos]) {
157 tbl->part = TBL_PART_DATA;
158 return(1);
159 }
160
161 /* Fallthrough: T} is part of a word. */
162 }
163
164 dat->pos = TBL_DATA_DATA;
165
166 if (dat->string) {
167 sz = strlen(p) + strlen(dat->string) + 2;
168 dat->string = mandoc_realloc(dat->string, sz);
169 strlcat(dat->string, " ", sz);
170 strlcat(dat->string, p, sz);
171 } else
172 dat->string = mandoc_strdup(p);
173
174 if (TBL_CELL_DOWN == dat->layout->pos)
175 mandoc_msg(MANDOCERR_TBLIGNDATA,
176 tbl->parse, ln, pos, NULL);
177
178 return(0);
179 }
180
181 static struct tbl_span *
182 newspan(struct tbl_node *tbl, int line, struct tbl_row *rp)
183 {
184 struct tbl_span *dp;
185
186 dp = mandoc_calloc(1, sizeof(struct tbl_span));
187 dp->line = line;
188 dp->opts = &tbl->opts;
189 dp->layout = rp;
190 dp->head = tbl->first_head;
191
192 if (tbl->last_span) {
193 tbl->last_span->next = dp;
194 tbl->last_span = dp;
195 } else {
196 tbl->last_span = tbl->first_span = dp;
197 tbl->current_span = NULL;
198 dp->flags |= TBL_SPAN_FIRST;
199 }
200
201 return(dp);
202 }
203
204 int
205 tbl_data(struct tbl_node *tbl, int ln, const char *p)
206 {
207 struct tbl_span *dp;
208 struct tbl_row *rp;
209 int pos;
210
211 pos = 0;
212
213 if ('\0' == p[pos]) {
214 mandoc_msg(MANDOCERR_TBL, tbl->parse, ln, pos, NULL);
215 return(0);
216 }
217
218 /*
219 * Choose a layout row: take the one following the last parsed
220 * span's. If that doesn't exist, use the last parsed span's.
221 * If there's no last parsed span, use the first row. Lastly,
222 * if the last span was a horizontal line, use the same layout
223 * (it doesn't "consume" the layout).
224 */
225
226 if (tbl->last_span) {
227 assert(tbl->last_span->layout);
228 if (tbl->last_span->pos == TBL_SPAN_DATA) {
229 for (rp = tbl->last_span->layout->next;
230 rp && rp->first; rp = rp->next) {
231 switch (rp->first->pos) {
232 case (TBL_CELL_HORIZ):
233 dp = newspan(tbl, ln, rp);
234 dp->pos = TBL_SPAN_HORIZ;
235 continue;
236 case (TBL_CELL_DHORIZ):
237 dp = newspan(tbl, ln, rp);
238 dp->pos = TBL_SPAN_DHORIZ;
239 continue;
240 default:
241 break;
242 }
243 break;
244 }
245 } else
246 rp = tbl->last_span->layout;
247
248 if (NULL == rp)
249 rp = tbl->last_span->layout;
250 } else
251 rp = tbl->first_row;
252
253 assert(rp);
254
255 dp = newspan(tbl, ln, rp);
256
257 if ( ! strcmp(p, "_")) {
258 dp->pos = TBL_SPAN_HORIZ;
259 return(1);
260 } else if ( ! strcmp(p, "=")) {
261 dp->pos = TBL_SPAN_DHORIZ;
262 return(1);
263 }
264
265 dp->pos = TBL_SPAN_DATA;
266
267 /* This returns 0 when TBL_PART_CDATA is entered. */
268
269 while ('\0' != p[pos])
270 if ( ! data(tbl, dp, ln, p, &pos))
271 return(0);
272
273 return(1);
274 }