Annotation of mandoc/tbl_data.c, Revision 1.56
1.56 ! schwarze 1: /* $Id: tbl_data.c,v 1.55 2021/05/18 13:22:43 schwarze Exp $ */
1.1 kristaps 2: /*
1.20 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.55 schwarze 4: * Copyright (c) 2011,2015,2017-2019,2021 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 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: */
1.11 kristaps 18: #include "config.h"
1.32 schwarze 19:
20: #include <sys/types.h>
1.11 kristaps 21:
1.1 kristaps 22: #include <assert.h>
23: #include <ctype.h>
1.53 schwarze 24: #include <stdint.h>
1.50 schwarze 25: #include <stdio.h>
1.1 kristaps 26: #include <stdlib.h>
27: #include <string.h>
1.6 kristaps 28: #include <time.h>
1.1 kristaps 29:
1.48 schwarze 30: #include "mandoc_aux.h"
1.1 kristaps 31: #include "mandoc.h"
1.48 schwarze 32: #include "tbl.h"
1.1 kristaps 33: #include "libmandoc.h"
1.49 schwarze 34: #include "tbl_int.h"
1.1 kristaps 35:
1.33 schwarze 36: static void getdata(struct tbl_node *, struct tbl_span *,
1.22 kristaps 37: int, const char *, int *);
1.30 schwarze 38: static struct tbl_span *newspan(struct tbl_node *, int,
1.22 kristaps 39: struct tbl_row *);
1.1 kristaps 40:
1.30 schwarze 41:
1.33 schwarze 42: static void
1.30 schwarze 43: getdata(struct tbl_node *tbl, struct tbl_span *dp,
1.1 kristaps 44: int ln, const char *p, int *pos)
45: {
1.46 schwarze 46: struct tbl_dat *dat, *pdat;
1.3 kristaps 47: struct tbl_cell *cp;
1.46 schwarze 48: struct tbl_span *pdp;
1.55 schwarze 49: const char *ccp;
1.37 schwarze 50: int sv;
1.1 kristaps 51:
1.47 schwarze 52: /*
53: * Determine the length of the string in the cell
54: * and advance the parse point to the end of the cell.
55: */
56:
57: sv = *pos;
1.55 schwarze 58: ccp = p + sv;
59: while (*ccp != '\0' && *ccp != tbl->opts.tab)
60: if (*ccp++ == '\\')
61: mandoc_escape(&ccp, NULL, NULL);
62: *pos = ccp - p;
1.47 schwarze 63:
1.38 schwarze 64: /* Advance to the next layout cell, skipping spanners. */
65:
1.37 schwarze 66: cp = dp->last == NULL ? dp->layout->first : dp->last->layout->next;
67: while (cp != NULL && cp->pos == TBL_CELL_SPAN)
1.3 kristaps 68: cp = cp->next;
69:
1.16 kristaps 70: /*
1.43 schwarze 71: * If the current layout row is out of cells, allocate
72: * a new cell if another row of the table has at least
73: * this number of columns, or discard the input if we
74: * are beyond the last column of the table as a whole.
1.16 kristaps 75: */
76:
1.37 schwarze 77: if (cp == NULL) {
1.43 schwarze 78: if (dp->layout->last->col + 1 < dp->opts->cols) {
79: cp = mandoc_calloc(1, sizeof(*cp));
80: cp->pos = TBL_CELL_LEFT;
1.56 ! schwarze 81: cp->font = ESCAPE_FONTROMAN;
1.53 schwarze 82: cp->spacing = SIZE_MAX;
1.43 schwarze 83: dp->layout->last->next = cp;
84: cp->col = dp->layout->last->col + 1;
85: dp->layout->last = cp;
86: } else {
1.51 schwarze 87: mandoc_msg(MANDOCERR_TBLDATA_EXTRA,
88: ln, sv, "%s", p + sv);
1.47 schwarze 89: while (p[*pos] != '\0')
1.43 schwarze 90: (*pos)++;
91: return;
92: }
1.16 kristaps 93: }
94:
1.46 schwarze 95: dat = mandoc_malloc(sizeof(*dat));
1.3 kristaps 96: dat->layout = cp;
1.46 schwarze 97: dat->next = NULL;
98: dat->string = NULL;
99: dat->hspans = 0;
100: dat->vspans = 0;
101: dat->block = 0;
1.11 kristaps 102: dat->pos = TBL_DATA_NONE;
1.46 schwarze 103:
104: /*
105: * Increment the number of vertical spans in a data cell above,
106: * if this cell vertically extends one or more cells above.
107: * The iteration must be done over data rows,
108: * not over layout rows, because one layout row
109: * can be reused for more than one data row.
110: */
111:
1.47 schwarze 112: if (cp->pos == TBL_CELL_DOWN ||
113: (*pos - sv == 2 && p[sv] == '\\' && p[sv + 1] == '^')) {
1.46 schwarze 114: pdp = dp;
115: while ((pdp = pdp->prev) != NULL) {
116: pdat = pdp->first;
117: while (pdat != NULL &&
118: pdat->layout->col < dat->layout->col)
119: pdat = pdat->next;
120: if (pdat == NULL)
121: break;
1.47 schwarze 122: if (pdat->layout->pos != TBL_CELL_DOWN &&
123: strcmp(pdat->string, "\\^") != 0) {
1.46 schwarze 124: pdat->vspans++;
125: break;
126: }
127: }
128: }
129:
130: /*
131: * Count the number of horizontal spans to the right of this cell.
132: * This is purely a matter of the layout, independent of the data.
133: */
134:
1.37 schwarze 135: for (cp = cp->next; cp != NULL; cp = cp->next)
136: if (cp->pos == TBL_CELL_SPAN)
1.46 schwarze 137: dat->hspans++;
1.16 kristaps 138: else
139: break;
1.46 schwarze 140:
141: /* Append the new data cell to the data row. */
1.30 schwarze 142:
1.37 schwarze 143: if (dp->last == NULL)
144: dp->first = dat;
145: else
1.1 kristaps 146: dp->last->next = dat;
1.37 schwarze 147: dp->last = dat;
1.1 kristaps 148:
1.11 kristaps 149: /*
150: * Check for a continued-data scope opening. This consists of a
151: * trailing `T{' at the end of the line. Subsequent lines,
152: * until a standalone `T}', are included in our cell.
153: */
154:
1.37 schwarze 155: if (*pos - sv == 2 && p[sv] == 'T' && p[sv + 1] == '{') {
1.11 kristaps 156: tbl->part = TBL_PART_CDATA;
1.33 schwarze 157: return;
1.11 kristaps 158: }
159:
1.37 schwarze 160: dat->string = mandoc_strndup(p + sv, *pos - sv);
1.1 kristaps 161:
1.47 schwarze 162: if (p[*pos] != '\0')
1.1 kristaps 163: (*pos)++;
164:
165: if ( ! strcmp(dat->string, "_"))
1.5 kristaps 166: dat->pos = TBL_DATA_HORIZ;
1.1 kristaps 167: else if ( ! strcmp(dat->string, "="))
1.5 kristaps 168: dat->pos = TBL_DATA_DHORIZ;
1.1 kristaps 169: else if ( ! strcmp(dat->string, "\\_"))
1.5 kristaps 170: dat->pos = TBL_DATA_NHORIZ;
1.1 kristaps 171: else if ( ! strcmp(dat->string, "\\="))
1.5 kristaps 172: dat->pos = TBL_DATA_NDHORIZ;
173: else
174: dat->pos = TBL_DATA_DATA;
1.11 kristaps 175:
1.37 schwarze 176: if ((dat->layout->pos == TBL_CELL_HORIZ ||
177: dat->layout->pos == TBL_CELL_DHORIZ ||
178: dat->layout->pos == TBL_CELL_DOWN) &&
179: dat->pos == TBL_DATA_DATA && *dat->string != '\0')
180: mandoc_msg(MANDOCERR_TBLDATA_SPAN,
1.51 schwarze 181: ln, sv, "%s", dat->string);
1.11 kristaps 182: }
183:
1.45 schwarze 184: void
1.35 schwarze 185: tbl_cdata(struct tbl_node *tbl, int ln, const char *p, int pos)
1.11 kristaps 186: {
187: struct tbl_dat *dat;
1.30 schwarze 188: size_t sz;
1.11 kristaps 189:
190: dat = tbl->last_span->last;
1.14 kristaps 191:
192: if (p[pos] == 'T' && p[pos + 1] == '}') {
193: pos += 2;
194: if (p[pos] == tbl->opts.tab) {
195: tbl->part = TBL_PART_DATA;
196: pos++;
1.40 schwarze 197: while (p[pos] != '\0')
198: getdata(tbl, tbl->last_span, ln, p, &pos);
1.45 schwarze 199: return;
1.37 schwarze 200: } else if (p[pos] == '\0') {
1.14 kristaps 201: tbl->part = TBL_PART_DATA;
1.45 schwarze 202: return;
1.14 kristaps 203: }
204:
205: /* Fallthrough: T} is part of a word. */
206: }
1.17 kristaps 207:
208: dat->pos = TBL_DATA_DATA;
1.42 schwarze 209: dat->block = 1;
1.11 kristaps 210:
1.37 schwarze 211: if (dat->string != NULL) {
1.36 schwarze 212: sz = strlen(p + pos) + strlen(dat->string) + 2;
1.11 kristaps 213: dat->string = mandoc_realloc(dat->string, sz);
1.31 schwarze 214: (void)strlcat(dat->string, " ", sz);
1.36 schwarze 215: (void)strlcat(dat->string, p + pos, sz);
1.11 kristaps 216: } else
1.36 schwarze 217: dat->string = mandoc_strdup(p + pos);
1.19 kristaps 218:
1.37 schwarze 219: if (dat->layout->pos == TBL_CELL_DOWN)
1.51 schwarze 220: mandoc_msg(MANDOCERR_TBLDATA_SPAN,
221: ln, pos, "%s", dat->string);
1.1 kristaps 222: }
223:
1.20 schwarze 224: static struct tbl_span *
1.22 kristaps 225: newspan(struct tbl_node *tbl, int line, struct tbl_row *rp)
1.20 schwarze 226: {
227: struct tbl_span *dp;
228:
1.37 schwarze 229: dp = mandoc_calloc(1, sizeof(*dp));
1.22 kristaps 230: dp->line = line;
1.26 schwarze 231: dp->opts = &tbl->opts;
1.20 schwarze 232: dp->layout = rp;
1.34 schwarze 233: dp->prev = tbl->last_span;
1.20 schwarze 234:
1.34 schwarze 235: if (dp->prev == NULL) {
236: tbl->first_span = dp;
1.21 schwarze 237: tbl->current_span = NULL;
1.34 schwarze 238: } else
239: dp->prev->next = dp;
240: tbl->last_span = dp;
1.20 schwarze 241:
1.41 schwarze 242: return dp;
1.20 schwarze 243: }
244:
1.33 schwarze 245: void
1.35 schwarze 246: tbl_data(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 kristaps 247: {
1.3 kristaps 248: struct tbl_row *rp;
1.43 schwarze 249: struct tbl_cell *cp;
1.44 schwarze 250: struct tbl_span *sp;
1.1 kristaps 251:
1.54 schwarze 252: for (sp = tbl->last_span; sp != NULL; sp = sp->prev)
253: if (sp->pos == TBL_SPAN_DATA)
254: break;
255: rp = sp == NULL ? tbl->first_row :
256: sp->layout->next == NULL ? sp->layout : sp->layout->next;
1.43 schwarze 257: assert(rp != NULL);
1.3 kristaps 258:
1.52 schwarze 259: if (p[1] == '\0') {
260: switch (p[0]) {
261: case '.':
262: /*
263: * Empty request lines must be handled here
264: * and cannot be discarded in roff_parseln()
265: * because in the layout section, they
266: * are significant and end the layout.
267: */
268: return;
269: case '_':
270: sp = newspan(tbl, ln, rp);
271: sp->pos = TBL_SPAN_HORIZ;
272: return;
273: case '=':
274: sp = newspan(tbl, ln, rp);
275: sp->pos = TBL_SPAN_DHORIZ;
276: return;
277: default:
278: break;
279: }
1.1 kristaps 280: }
1.43 schwarze 281:
282: /*
1.44 schwarze 283: * If the layout row contains nothing but horizontal lines,
284: * allocate an empty span for it and assign the current span
285: * to the next layout row accepting data.
1.43 schwarze 286: */
287:
1.44 schwarze 288: while (rp->next != NULL) {
289: if (rp->last->col + 1 < tbl->opts.cols)
290: break;
291: for (cp = rp->first; cp != NULL; cp = cp->next)
292: if (cp->pos != TBL_CELL_HORIZ &&
293: cp->pos != TBL_CELL_DHORIZ)
294: break;
295: if (cp != NULL)
296: break;
297: sp = newspan(tbl, ln, rp);
298: sp->pos = TBL_SPAN_DATA;
299: rp = rp->next;
1.43 schwarze 300: }
1.5 kristaps 301:
1.44 schwarze 302: /* Process a real data row. */
1.1 kristaps 303:
1.44 schwarze 304: sp = newspan(tbl, ln, rp);
305: sp->pos = TBL_SPAN_DATA;
306: while (p[pos] != '\0')
307: getdata(tbl, sp, ln, p, &pos);
1.1 kristaps 308: }
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