Annotation of mandoc/mdoc.c, Revision 1.267
1.267 ! schwarze 1: /* $Id: mdoc.c,v 1.266 2017/06/07 20:58:49 schwarze Exp $ */
1.1 kristaps 2: /*
1.182 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.259 schwarze 4: * Copyright (c) 2010, 2012-2017 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.75 kristaps 7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
1.1 kristaps 9: *
1.241 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.75 kristaps 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.241 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.75 kristaps 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.
1.1 kristaps 17: */
1.114 kristaps 18: #include "config.h"
19:
1.106 kristaps 20: #include <sys/types.h>
21:
1.1 kristaps 22: #include <assert.h>
1.211 schwarze 23: #include <ctype.h>
1.1 kristaps 24: #include <stdarg.h>
1.73 kristaps 25: #include <stdio.h>
1.1 kristaps 26: #include <stdlib.h>
27: #include <string.h>
1.120 kristaps 28: #include <time.h>
1.1 kristaps 29:
1.239 schwarze 30: #include "mandoc_aux.h"
31: #include "mandoc.h"
32: #include "roff.h"
1.187 kristaps 33: #include "mdoc.h"
1.239 schwarze 34: #include "libmandoc.h"
1.247 schwarze 35: #include "roff_int.h"
1.70 kristaps 36: #include "libmdoc.h"
1.1 kristaps 37:
1.213 schwarze 38: const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
1.1 kristaps 39: "split", "nosplit", "ragged",
1.213 schwarze 40: "unfilled", "literal", "file",
41: "offset", "bullet", "dash",
42: "hyphen", "item", "enum",
43: "tag", "diag", "hang",
44: "ohang", "inset", "column",
45: "width", "compact", "std",
1.52 kristaps 46: "filled", "words", "emphasis",
1.108 kristaps 47: "symbolic", "nested", "centered"
1.262 schwarze 48: };
1.1 kristaps 49: const char * const *mdoc_argnames = __mdoc_argnames;
50:
1.242 schwarze 51: static int mdoc_ptext(struct roff_man *, int, char *, int);
52: static int mdoc_pmacro(struct roff_man *, int, char *, int);
1.88 kristaps 53:
1.181 kristaps 54:
1.50 kristaps 55: /*
1.53 kristaps 56: * Main parse routine. Parses a single line -- really just hands off to
1.123 kristaps 57: * the macro (mdoc_pmacro()) or text parser (mdoc_ptext()).
1.50 kristaps 58: */
1.20 kristaps 59: int
1.242 schwarze 60: mdoc_parseln(struct roff_man *mdoc, int ln, char *buf, int offs)
1.1 kristaps 61: {
62:
1.239 schwarze 63: if (mdoc->last->type != ROFFT_EQN || ln > mdoc->last->line)
1.228 schwarze 64: mdoc->flags |= MDOC_NEWLINE;
1.153 schwarze 65:
66: /*
67: * Let the roff nS register switch SYNOPSIS mode early,
68: * such that the parser knows at all times
69: * whether this mode is on or off.
70: * Note that this mode is also switched by the Sh macro.
71: */
1.204 schwarze 72: if (roff_getreg(mdoc->roff, "nS"))
73: mdoc->flags |= MDOC_SYNOPSIS;
74: else
75: mdoc->flags &= ~MDOC_SYNOPSIS;
1.153 schwarze 76:
1.253 schwarze 77: return roff_getcontrol(mdoc->roff, buf, &offs) ?
1.213 schwarze 78: mdoc_pmacro(mdoc, ln, buf, offs) :
1.253 schwarze 79: mdoc_ptext(mdoc, ln, buf, offs);
1.1 kristaps 80: }
81:
1.232 schwarze 82: void
1.148 kristaps 83: mdoc_macro(MACRO_PROT_ARGS)
1.88 kristaps 84: {
1.262 schwarze 85: assert(tok >= MDOC_Dd && tok < MDOC_MAX);
1.232 schwarze 86: (*mdoc_macros[tok].fp)(mdoc, tok, line, ppos, pos, buf);
1.73 kristaps 87: }
88:
1.231 schwarze 89: void
1.262 schwarze 90: mdoc_tail_alloc(struct roff_man *mdoc, int line, int pos, enum roff_tok tok)
1.17 kristaps 91: {
1.240 schwarze 92: struct roff_node *p;
1.17 kristaps 93:
1.247 schwarze 94: p = roff_node_alloc(mdoc, line, pos, ROFFT_TAIL, tok);
95: roff_node_append(mdoc, p);
1.242 schwarze 96: mdoc->next = ROFF_NEXT_CHILD;
1.152 schwarze 97: }
98:
1.240 schwarze 99: struct roff_node *
1.262 schwarze 100: mdoc_endbody_alloc(struct roff_man *mdoc, int line, int pos,
101: enum roff_tok tok, struct roff_node *body)
1.152 schwarze 102: {
1.240 schwarze 103: struct roff_node *p;
1.152 schwarze 104:
1.258 schwarze 105: body->flags |= NODE_ENDED;
106: body->parent->flags |= NODE_ENDED;
1.247 schwarze 107: p = roff_node_alloc(mdoc, line, pos, ROFFT_BODY, tok);
1.237 schwarze 108: p->body = body;
1.202 schwarze 109: p->norm = body->norm;
1.260 schwarze 110: p->end = ENDBODY_SPACE;
1.247 schwarze 111: roff_node_append(mdoc, p);
1.242 schwarze 112: mdoc->next = ROFF_NEXT_SIBLING;
1.253 schwarze 113: return p;
1.1 kristaps 114: }
115:
1.240 schwarze 116: struct roff_node *
1.242 schwarze 117: mdoc_block_alloc(struct roff_man *mdoc, int line, int pos,
1.262 schwarze 118: enum roff_tok tok, struct mdoc_arg *args)
1.1 kristaps 119: {
1.240 schwarze 120: struct roff_node *p;
1.1 kristaps 121:
1.247 schwarze 122: p = roff_node_alloc(mdoc, line, pos, ROFFT_BLOCK, tok);
1.77 kristaps 123: p->args = args;
124: if (p->args)
1.53 kristaps 125: (args->refcnt)++;
1.172 kristaps 126:
127: switch (tok) {
1.213 schwarze 128: case MDOC_Bd:
129: case MDOC_Bf:
130: case MDOC_Bl:
1.217 schwarze 131: case MDOC_En:
1.213 schwarze 132: case MDOC_Rs:
1.172 kristaps 133: p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
134: break;
135: default:
136: break;
137: }
1.247 schwarze 138: roff_node_append(mdoc, p);
1.242 schwarze 139: mdoc->next = ROFF_NEXT_CHILD;
1.253 schwarze 140: return p;
1.1 kristaps 141: }
142:
1.231 schwarze 143: void
1.242 schwarze 144: mdoc_elem_alloc(struct roff_man *mdoc, int line, int pos,
1.262 schwarze 145: enum roff_tok tok, struct mdoc_arg *args)
1.1 kristaps 146: {
1.240 schwarze 147: struct roff_node *p;
1.1 kristaps 148:
1.247 schwarze 149: p = roff_node_alloc(mdoc, line, pos, ROFFT_ELEM, tok);
1.77 kristaps 150: p->args = args;
151: if (p->args)
1.53 kristaps 152: (args->refcnt)++;
1.172 kristaps 153:
154: switch (tok) {
1.213 schwarze 155: case MDOC_An:
1.172 kristaps 156: p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
157: break;
158: default:
159: break;
160: }
1.247 schwarze 161: roff_node_append(mdoc, p);
1.242 schwarze 162: mdoc->next = ROFF_NEXT_CHILD;
1.175 kristaps 163: }
1.1 kristaps 164:
1.231 schwarze 165: void
1.242 schwarze 166: mdoc_node_relink(struct roff_man *mdoc, struct roff_node *p)
1.201 schwarze 167: {
168:
1.247 schwarze 169: roff_node_unlink(mdoc, p);
1.256 schwarze 170: p->prev = p->next = NULL;
1.247 schwarze 171: roff_node_append(mdoc, p);
1.1 kristaps 172: }
173:
1.53 kristaps 174: /*
175: * Parse free-form text, that is, a line that does not begin with the
176: * control character.
177: */
178: static int
1.242 schwarze 179: mdoc_ptext(struct roff_man *mdoc, int line, char *buf, int offs)
1.1 kristaps 180: {
1.240 schwarze 181: struct roff_node *n;
1.267 ! schwarze 182: const char *cp, *sp;
1.142 kristaps 183: char *c, *ws, *end;
184:
1.203 schwarze 185: n = mdoc->last;
1.142 kristaps 186:
187: /*
1.257 schwarze 188: * If a column list contains plain text, assume an implicit item
189: * macro. This can happen one or more times at the beginning
190: * of such a list, intermixed with non-It mdoc macros and with
191: * nodes generated on the roff level, for example by tbl.
1.142 kristaps 192: */
193:
1.257 schwarze 194: if ((n->tok == MDOC_Bl && n->type == ROFFT_BODY &&
195: n->end == ENDBODY_NOT && n->norm->Bl.type == LIST_column) ||
196: (n->parent != NULL && n->parent->tok == MDOC_Bl &&
197: n->parent->norm->Bl.type == LIST_column)) {
1.203 schwarze 198: mdoc->flags |= MDOC_FREECOL;
1.232 schwarze 199: mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf);
1.253 schwarze 200: return 1;
1.142 kristaps 201: }
1.124 kristaps 202:
1.137 schwarze 203: /*
204: * Search for the beginning of unescaped trailing whitespace (ws)
205: * and for the first character not to be output (end).
206: */
1.139 kristaps 207:
208: /* FIXME: replace with strcspn(). */
1.137 schwarze 209: ws = NULL;
210: for (c = end = buf + offs; *c; c++) {
211: switch (*c) {
212: case ' ':
213: if (NULL == ws)
214: ws = c;
215: continue;
216: case '\t':
217: /*
218: * Always warn about trailing tabs,
219: * even outside literal context,
220: * where they should be put on the next line.
221: */
222: if (NULL == ws)
223: ws = c;
224: /*
225: * Strip trailing tabs in literal context only;
226: * outside, they affect the next line.
227: */
1.203 schwarze 228: if (MDOC_LITERAL & mdoc->flags)
1.137 schwarze 229: continue;
230: break;
231: case '\\':
232: /* Skip the escaped character, too, if any. */
233: if (c[1])
234: c++;
235: /* FALLTHROUGH */
236: default:
237: ws = NULL;
238: break;
239: }
240: end = c + 1;
241: }
242: *end = '\0';
1.91 kristaps 243:
1.137 schwarze 244: if (ws)
1.218 schwarze 245: mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
246: line, (int)(ws-buf), NULL);
1.115 kristaps 247:
1.267 ! schwarze 248: /*
! 249: * Blank lines are allowed in no-fill mode
! 250: * and cancel preceding \c,
! 251: * but add a single vertical space elsewhere.
! 252: */
! 253:
1.231 schwarze 254: if (buf[offs] == '\0' && ! (mdoc->flags & MDOC_LITERAL)) {
1.267 ! schwarze 255: switch (mdoc->last->type) {
! 256: case ROFFT_TEXT:
! 257: sp = mdoc->last->string;
! 258: cp = end = strchr(sp, '\0') - 2;
! 259: if (cp < sp || cp[0] != '\\' || cp[1] != 'c')
! 260: break;
! 261: while (cp > sp && cp[-1] == '\\')
! 262: cp--;
! 263: if ((end - cp) % 2)
! 264: break;
! 265: *end = '\0';
! 266: return 1;
! 267: default:
! 268: break;
! 269: }
1.218 schwarze 270: mandoc_msg(MANDOCERR_FI_BLANK, mdoc->parse,
271: line, (int)(c - buf), NULL);
1.264 schwarze 272: roff_elem_alloc(mdoc, line, offs, ROFF_sp);
1.258 schwarze 273: mdoc->last->flags |= NODE_VALID | NODE_ENDED;
1.242 schwarze 274: mdoc->next = ROFF_NEXT_SIBLING;
1.253 schwarze 275: return 1;
1.119 kristaps 276: }
1.68 kristaps 277:
1.249 schwarze 278: roff_word_alloc(mdoc, line, offs, buf+offs);
1.91 kristaps 279:
1.231 schwarze 280: if (mdoc->flags & MDOC_LITERAL)
1.253 schwarze 281: return 1;
1.128 kristaps 282:
283: /*
284: * End-of-sentence check. If the last character is an unescaped
285: * EOS character, then flag the node as being the end of a
286: * sentence. The front-end will know how to interpret this.
287: */
1.132 kristaps 288:
1.137 schwarze 289: assert(buf < end);
290:
1.207 schwarze 291: if (mandoc_eos(buf+offs, (size_t)(end-buf-offs)))
1.258 schwarze 292: mdoc->last->flags |= NODE_EOS;
1.259 schwarze 293:
294: for (c = buf + offs; c != NULL; c = strchr(c + 1, '.')) {
295: if (c - buf < offs + 2)
296: continue;
1.265 schwarze 297: if (end - c < 3)
1.259 schwarze 298: break;
1.266 schwarze 299: if (c[1] != ' ' ||
300: isalpha((unsigned char)c[-2]) == 0 ||
301: isalpha((unsigned char)c[-1]) == 0 ||
302: (c[-2] == 'n' && c[-1] == 'c') ||
303: (c[-2] == 'v' && c[-1] == 's'))
304: continue;
305: c += 2;
306: if (*c == ' ')
307: c++;
308: if (*c == ' ')
309: c++;
310: if (isupper((unsigned char)(*c)))
1.259 schwarze 311: mandoc_msg(MANDOCERR_EOS, mdoc->parse,
312: line, (int)(c - buf), NULL);
313: }
314:
1.253 schwarze 315: return 1;
1.1 kristaps 316: }
317:
1.53 kristaps 318: /*
319: * Parse a macro line, that is, a line beginning with the control
320: * character.
321: */
1.155 kristaps 322: static int
1.242 schwarze 323: mdoc_pmacro(struct roff_man *mdoc, int ln, char *buf, int offs)
1.1 kristaps 324: {
1.240 schwarze 325: struct roff_node *n;
1.229 schwarze 326: const char *cp;
1.263 schwarze 327: size_t sz;
1.262 schwarze 328: enum roff_tok tok;
1.263 schwarze 329: int sv;
330:
331: /* Determine the line macro. */
1.63 kristaps 332:
1.188 kristaps 333: sv = offs;
1.263 schwarze 334: tok = TOKEN_NONE;
335: for (sz = 0; sz < 4 && strchr(" \t\\", buf[offs]) == NULL; sz++)
336: offs++;
337: if (sz == 2 || sz == 3)
338: tok = roffhash_find(mdoc->mdocmac, buf + sv, sz);
1.248 schwarze 339: if (tok == TOKEN_NONE) {
1.222 schwarze 340: mandoc_msg(MANDOCERR_MACRO, mdoc->parse,
341: ln, sv, buf + sv - 1);
1.253 schwarze 342: return 1;
1.53 kristaps 343: }
1.1 kristaps 344:
1.229 schwarze 345: /* Skip a leading escape sequence or tab. */
1.160 kristaps 346:
1.229 schwarze 347: switch (buf[offs]) {
348: case '\\':
349: cp = buf + offs + 1;
350: mandoc_escape(&cp, NULL, NULL);
351: offs = cp - buf;
352: break;
353: case '\t':
1.188 kristaps 354: offs++;
1.229 schwarze 355: break;
356: default:
357: break;
358: }
1.160 kristaps 359:
360: /* Jump to the next non-whitespace word. */
1.1 kristaps 361:
1.261 schwarze 362: while (buf[offs] == ' ')
1.188 kristaps 363: offs++;
1.1 kristaps 364:
1.213 schwarze 365: /*
1.125 kristaps 366: * Trailing whitespace. Note that tabs are allowed to be passed
367: * into the parser as "text", so we only warn about spaces here.
368: */
1.115 kristaps 369:
1.188 kristaps 370: if ('\0' == buf[offs] && ' ' == buf[offs - 1])
1.218 schwarze 371: mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
372: ln, offs - 1, NULL);
1.115 kristaps 373:
1.144 kristaps 374: /*
375: * If an initial macro or a list invocation, divert directly
376: * into macro processing.
377: */
378:
1.257 schwarze 379: n = mdoc->last;
380: if (n == NULL || tok == MDOC_It || tok == MDOC_El) {
1.232 schwarze 381: mdoc_macro(mdoc, tok, ln, sv, &offs, buf);
1.253 schwarze 382: return 1;
1.232 schwarze 383: }
1.144 kristaps 384:
385: /*
1.257 schwarze 386: * If a column list contains a non-It macro, assume an implicit
387: * item macro. This can happen one or more times at the
388: * beginning of such a list, intermixed with text lines and
389: * with nodes generated on the roff level, for example by tbl.
1.98 kristaps 390: */
1.144 kristaps 391:
1.257 schwarze 392: if ((n->tok == MDOC_Bl && n->type == ROFFT_BODY &&
393: n->end == ENDBODY_NOT && n->norm->Bl.type == LIST_column) ||
394: (n->parent != NULL && n->parent->tok == MDOC_Bl &&
395: n->parent->norm->Bl.type == LIST_column)) {
1.203 schwarze 396: mdoc->flags |= MDOC_FREECOL;
1.232 schwarze 397: mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf);
1.253 schwarze 398: return 1;
1.144 kristaps 399: }
400:
401: /* Normal processing of a macro. */
402:
1.232 schwarze 403: mdoc_macro(mdoc, tok, ln, sv, &offs, buf);
1.208 schwarze 404:
405: /* In quick mode (for mandocdb), abort after the NAME section. */
406:
407: if (mdoc->quick && MDOC_Sh == tok &&
408: SEC_NAME != mdoc->last->sec)
1.253 schwarze 409: return 2;
1.1 kristaps 410:
1.253 schwarze 411: return 1;
1.1 kristaps 412: }
1.100 kristaps 413:
1.186 kristaps 414: enum mdelim
415: mdoc_isdelim(const char *p)
416: {
417:
418: if ('\0' == p[0])
1.253 schwarze 419: return DELIM_NONE;
1.186 kristaps 420:
421: if ('\0' == p[1])
422: switch (p[0]) {
1.213 schwarze 423: case '(':
424: case '[':
1.253 schwarze 425: return DELIM_OPEN;
1.213 schwarze 426: case '|':
1.253 schwarze 427: return DELIM_MIDDLE;
1.213 schwarze 428: case '.':
429: case ',':
430: case ';':
431: case ':':
432: case '?':
433: case '!':
434: case ')':
435: case ']':
1.253 schwarze 436: return DELIM_CLOSE;
1.186 kristaps 437: default:
1.253 schwarze 438: return DELIM_NONE;
1.186 kristaps 439: }
440:
441: if ('\\' != p[0])
1.253 schwarze 442: return DELIM_NONE;
1.100 kristaps 443:
1.186 kristaps 444: if (0 == strcmp(p + 1, "."))
1.253 schwarze 445: return DELIM_CLOSE;
1.200 schwarze 446: if (0 == strcmp(p + 1, "fR|\\fP"))
1.253 schwarze 447: return DELIM_MIDDLE;
1.186 kristaps 448:
1.253 schwarze 449: return DELIM_NONE;
1.255 schwarze 450: }
451:
452: void
453: mdoc_validate(struct roff_man *mdoc)
454: {
455:
456: mdoc->last = mdoc->first;
457: mdoc_node_validate(mdoc);
458: mdoc_state_reset(mdoc);
1.186 kristaps 459: }
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