Annotation of mandoc/tbl_data.c, Revision 1.54
1.54 ! schwarze 1: /* $Id: tbl_data.c,v 1.53 2020/01/11 20:48:18 schwarze Exp $ */
1.1 kristaps 2: /*
1.20 schwarze 3: * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.52 schwarze 4: * Copyright (c) 2011,2015,2017,2018,2019 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;
1.37 schwarze 49: int sv;
1.1 kristaps 50:
1.47 schwarze 51: /*
52: * Determine the length of the string in the cell
53: * and advance the parse point to the end of the cell.
54: */
55:
56: sv = *pos;
57: while (p[*pos] != '\0' && p[*pos] != tbl->opts.tab)
58: (*pos)++;
59:
1.38 schwarze 60: /* Advance to the next layout cell, skipping spanners. */
61:
1.37 schwarze 62: cp = dp->last == NULL ? dp->layout->first : dp->last->layout->next;
63: while (cp != NULL && cp->pos == TBL_CELL_SPAN)
1.3 kristaps 64: cp = cp->next;
65:
1.16 kristaps 66: /*
1.43 schwarze 67: * If the current layout row is out of cells, allocate
68: * a new cell if another row of the table has at least
69: * this number of columns, or discard the input if we
70: * are beyond the last column of the table as a whole.
1.16 kristaps 71: */
72:
1.37 schwarze 73: if (cp == NULL) {
1.43 schwarze 74: if (dp->layout->last->col + 1 < dp->opts->cols) {
75: cp = mandoc_calloc(1, sizeof(*cp));
76: cp->pos = TBL_CELL_LEFT;
1.53 schwarze 77: cp->spacing = SIZE_MAX;
1.43 schwarze 78: dp->layout->last->next = cp;
79: cp->col = dp->layout->last->col + 1;
80: dp->layout->last = cp;
81: } else {
1.51 schwarze 82: mandoc_msg(MANDOCERR_TBLDATA_EXTRA,
83: ln, sv, "%s", p + sv);
1.47 schwarze 84: while (p[*pos] != '\0')
1.43 schwarze 85: (*pos)++;
86: return;
87: }
1.16 kristaps 88: }
89:
1.46 schwarze 90: dat = mandoc_malloc(sizeof(*dat));
1.3 kristaps 91: dat->layout = cp;
1.46 schwarze 92: dat->next = NULL;
93: dat->string = NULL;
94: dat->hspans = 0;
95: dat->vspans = 0;
96: dat->block = 0;
1.11 kristaps 97: dat->pos = TBL_DATA_NONE;
1.46 schwarze 98:
99: /*
100: * Increment the number of vertical spans in a data cell above,
101: * if this cell vertically extends one or more cells above.
102: * The iteration must be done over data rows,
103: * not over layout rows, because one layout row
104: * can be reused for more than one data row.
105: */
106:
1.47 schwarze 107: if (cp->pos == TBL_CELL_DOWN ||
108: (*pos - sv == 2 && p[sv] == '\\' && p[sv + 1] == '^')) {
1.46 schwarze 109: pdp = dp;
110: while ((pdp = pdp->prev) != NULL) {
111: pdat = pdp->first;
112: while (pdat != NULL &&
113: pdat->layout->col < dat->layout->col)
114: pdat = pdat->next;
115: if (pdat == NULL)
116: break;
1.47 schwarze 117: if (pdat->layout->pos != TBL_CELL_DOWN &&
118: strcmp(pdat->string, "\\^") != 0) {
1.46 schwarze 119: pdat->vspans++;
120: break;
121: }
122: }
123: }
124:
125: /*
126: * Count the number of horizontal spans to the right of this cell.
127: * This is purely a matter of the layout, independent of the data.
128: */
129:
1.37 schwarze 130: for (cp = cp->next; cp != NULL; cp = cp->next)
131: if (cp->pos == TBL_CELL_SPAN)
1.46 schwarze 132: dat->hspans++;
1.16 kristaps 133: else
134: break;
1.46 schwarze 135:
136: /* Append the new data cell to the data row. */
1.30 schwarze 137:
1.37 schwarze 138: if (dp->last == NULL)
139: dp->first = dat;
140: else
1.1 kristaps 141: dp->last->next = dat;
1.37 schwarze 142: dp->last = dat;
1.1 kristaps 143:
1.11 kristaps 144: /*
145: * Check for a continued-data scope opening. This consists of a
146: * trailing `T{' at the end of the line. Subsequent lines,
147: * until a standalone `T}', are included in our cell.
148: */
149:
1.37 schwarze 150: if (*pos - sv == 2 && p[sv] == 'T' && p[sv + 1] == '{') {
1.11 kristaps 151: tbl->part = TBL_PART_CDATA;
1.33 schwarze 152: return;
1.11 kristaps 153: }
154:
1.37 schwarze 155: dat->string = mandoc_strndup(p + sv, *pos - sv);
1.1 kristaps 156:
1.47 schwarze 157: if (p[*pos] != '\0')
1.1 kristaps 158: (*pos)++;
159:
160: if ( ! strcmp(dat->string, "_"))
1.5 kristaps 161: dat->pos = TBL_DATA_HORIZ;
1.1 kristaps 162: else if ( ! strcmp(dat->string, "="))
1.5 kristaps 163: dat->pos = TBL_DATA_DHORIZ;
1.1 kristaps 164: else if ( ! strcmp(dat->string, "\\_"))
1.5 kristaps 165: dat->pos = TBL_DATA_NHORIZ;
1.1 kristaps 166: else if ( ! strcmp(dat->string, "\\="))
1.5 kristaps 167: dat->pos = TBL_DATA_NDHORIZ;
168: else
169: dat->pos = TBL_DATA_DATA;
1.11 kristaps 170:
1.37 schwarze 171: if ((dat->layout->pos == TBL_CELL_HORIZ ||
172: dat->layout->pos == TBL_CELL_DHORIZ ||
173: dat->layout->pos == TBL_CELL_DOWN) &&
174: dat->pos == TBL_DATA_DATA && *dat->string != '\0')
175: mandoc_msg(MANDOCERR_TBLDATA_SPAN,
1.51 schwarze 176: ln, sv, "%s", dat->string);
1.11 kristaps 177: }
178:
1.45 schwarze 179: void
1.35 schwarze 180: tbl_cdata(struct tbl_node *tbl, int ln, const char *p, int pos)
1.11 kristaps 181: {
182: struct tbl_dat *dat;
1.30 schwarze 183: size_t sz;
1.11 kristaps 184:
185: dat = tbl->last_span->last;
1.14 kristaps 186:
187: if (p[pos] == 'T' && p[pos + 1] == '}') {
188: pos += 2;
189: if (p[pos] == tbl->opts.tab) {
190: tbl->part = TBL_PART_DATA;
191: pos++;
1.40 schwarze 192: while (p[pos] != '\0')
193: getdata(tbl, tbl->last_span, ln, p, &pos);
1.45 schwarze 194: return;
1.37 schwarze 195: } else if (p[pos] == '\0') {
1.14 kristaps 196: tbl->part = TBL_PART_DATA;
1.45 schwarze 197: return;
1.14 kristaps 198: }
199:
200: /* Fallthrough: T} is part of a word. */
201: }
1.17 kristaps 202:
203: dat->pos = TBL_DATA_DATA;
1.42 schwarze 204: dat->block = 1;
1.11 kristaps 205:
1.37 schwarze 206: if (dat->string != NULL) {
1.36 schwarze 207: sz = strlen(p + pos) + strlen(dat->string) + 2;
1.11 kristaps 208: dat->string = mandoc_realloc(dat->string, sz);
1.31 schwarze 209: (void)strlcat(dat->string, " ", sz);
1.36 schwarze 210: (void)strlcat(dat->string, p + pos, sz);
1.11 kristaps 211: } else
1.36 schwarze 212: dat->string = mandoc_strdup(p + pos);
1.19 kristaps 213:
1.37 schwarze 214: if (dat->layout->pos == TBL_CELL_DOWN)
1.51 schwarze 215: mandoc_msg(MANDOCERR_TBLDATA_SPAN,
216: ln, pos, "%s", dat->string);
1.1 kristaps 217: }
218:
1.20 schwarze 219: static struct tbl_span *
1.22 kristaps 220: newspan(struct tbl_node *tbl, int line, struct tbl_row *rp)
1.20 schwarze 221: {
222: struct tbl_span *dp;
223:
1.37 schwarze 224: dp = mandoc_calloc(1, sizeof(*dp));
1.22 kristaps 225: dp->line = line;
1.26 schwarze 226: dp->opts = &tbl->opts;
1.20 schwarze 227: dp->layout = rp;
1.34 schwarze 228: dp->prev = tbl->last_span;
1.20 schwarze 229:
1.34 schwarze 230: if (dp->prev == NULL) {
231: tbl->first_span = dp;
1.21 schwarze 232: tbl->current_span = NULL;
1.34 schwarze 233: } else
234: dp->prev->next = dp;
235: tbl->last_span = dp;
1.20 schwarze 236:
1.41 schwarze 237: return dp;
1.20 schwarze 238: }
239:
1.33 schwarze 240: void
1.35 schwarze 241: tbl_data(struct tbl_node *tbl, int ln, const char *p, int pos)
1.1 kristaps 242: {
1.3 kristaps 243: struct tbl_row *rp;
1.43 schwarze 244: struct tbl_cell *cp;
1.44 schwarze 245: struct tbl_span *sp;
1.1 kristaps 246:
1.54 ! schwarze 247: for (sp = tbl->last_span; sp != NULL; sp = sp->prev)
! 248: if (sp->pos == TBL_SPAN_DATA)
! 249: break;
! 250: rp = sp == NULL ? tbl->first_row :
! 251: sp->layout->next == NULL ? sp->layout : sp->layout->next;
1.43 schwarze 252: assert(rp != NULL);
1.3 kristaps 253:
1.52 schwarze 254: if (p[1] == '\0') {
255: switch (p[0]) {
256: case '.':
257: /*
258: * Empty request lines must be handled here
259: * and cannot be discarded in roff_parseln()
260: * because in the layout section, they
261: * are significant and end the layout.
262: */
263: return;
264: case '_':
265: sp = newspan(tbl, ln, rp);
266: sp->pos = TBL_SPAN_HORIZ;
267: return;
268: case '=':
269: sp = newspan(tbl, ln, rp);
270: sp->pos = TBL_SPAN_DHORIZ;
271: return;
272: default:
273: break;
274: }
1.1 kristaps 275: }
1.43 schwarze 276:
277: /*
1.44 schwarze 278: * If the layout row contains nothing but horizontal lines,
279: * allocate an empty span for it and assign the current span
280: * to the next layout row accepting data.
1.43 schwarze 281: */
282:
1.44 schwarze 283: while (rp->next != NULL) {
284: if (rp->last->col + 1 < tbl->opts.cols)
285: break;
286: for (cp = rp->first; cp != NULL; cp = cp->next)
287: if (cp->pos != TBL_CELL_HORIZ &&
288: cp->pos != TBL_CELL_DHORIZ)
289: break;
290: if (cp != NULL)
291: break;
292: sp = newspan(tbl, ln, rp);
293: sp->pos = TBL_SPAN_DATA;
294: rp = rp->next;
1.43 schwarze 295: }
1.5 kristaps 296:
1.44 schwarze 297: /* Process a real data row. */
1.1 kristaps 298:
1.44 schwarze 299: sp = newspan(tbl, ln, rp);
300: sp->pos = TBL_SPAN_DATA;
301: while (p[pos] != '\0')
302: getdata(tbl, sp, ln, p, &pos);
1.1 kristaps 303: }
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