Annotation of src/usr.bin/mandoc/mdoc.c, Revision 1.138
1.138 ! schwarze 1: /* $OpenBSD: mdoc.c,v 1.137 2015/04/19 13:59:37 schwarze Exp $ */
1.1 kristaps 2: /*
1.77 schwarze 3: * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
1.126 schwarze 4: * Copyright (c) 2010, 2012-2015 Ingo Schwarze <schwarze@openbsd.org>
1.1 kristaps 5: *
6: * Permission to use, copy, modify, and distribute this software for any
1.3 schwarze 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: *
1.130 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.3 schwarze 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.130 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.3 schwarze 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: */
1.28 schwarze 18: #include <sys/types.h>
19:
1.1 kristaps 20: #include <assert.h>
1.101 schwarze 21: #include <ctype.h>
1.1 kristaps 22: #include <stdarg.h>
23: #include <stdio.h>
24: #include <stdlib.h>
25: #include <string.h>
1.39 schwarze 26: #include <time.h>
1.1 kristaps 27:
1.128 schwarze 28: #include "mandoc_aux.h"
29: #include "mandoc.h"
30: #include "roff.h"
1.83 schwarze 31: #include "mdoc.h"
1.128 schwarze 32: #include "libmandoc.h"
1.136 schwarze 33: #include "roff_int.h"
1.1 kristaps 34: #include "libmdoc.h"
35:
1.106 schwarze 36: const char *const __mdoc_macronames[MDOC_MAX + 1] = {
1.137 schwarze 37: "text",
1.7 schwarze 38: "Ap", "Dd", "Dt", "Os",
1.1 kristaps 39: "Sh", "Ss", "Pp", "D1",
40: "Dl", "Bd", "Ed", "Bl",
41: "El", "It", "Ad", "An",
42: "Ar", "Cd", "Cm", "Dv",
43: "Er", "Ev", "Ex", "Fa",
44: "Fd", "Fl", "Fn", "Ft",
45: "Ic", "In", "Li", "Nd",
46: "Nm", "Op", "Ot", "Pa",
47: "Rv", "St", "Va", "Vt",
1.33 schwarze 48: "Xr", "%A", "%B", "%D",
49: "%I", "%J", "%N", "%O",
50: "%P", "%R", "%T", "%V",
1.1 kristaps 51: "Ac", "Ao", "Aq", "At",
52: "Bc", "Bf", "Bo", "Bq",
53: "Bsx", "Bx", "Db", "Dc",
54: "Do", "Dq", "Ec", "Ef",
55: "Em", "Eo", "Fx", "Ms",
56: "No", "Ns", "Nx", "Ox",
57: "Pc", "Pf", "Po", "Pq",
58: "Qc", "Ql", "Qo", "Qq",
59: "Re", "Rs", "Sc", "So",
60: "Sq", "Sm", "Sx", "Sy",
61: "Tn", "Ux", "Xc", "Xo",
62: "Fo", "Fc", "Oo", "Oc",
63: "Bk", "Ek", "Bt", "Hf",
1.7 schwarze 64: "Fr", "Ud", "Lb", "Lp",
65: "Lk", "Mt", "Brq", "Bro",
1.33 schwarze 66: "Brc", "%C", "Es", "En",
67: "Dx", "%Q", "br", "sp",
1.137 schwarze 68: "%U", "Ta", "ll",
69: };
1.1 kristaps 70:
1.103 schwarze 71: const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
1.1 kristaps 72: "split", "nosplit", "ragged",
1.103 schwarze 73: "unfilled", "literal", "file",
74: "offset", "bullet", "dash",
75: "hyphen", "item", "enum",
76: "tag", "diag", "hang",
77: "ohang", "inset", "column",
78: "width", "compact", "std",
1.1 kristaps 79: "filled", "words", "emphasis",
1.30 schwarze 80: "symbolic", "nested", "centered"
1.1 kristaps 81: };
82:
1.137 schwarze 83: const char * const *mdoc_macronames = __mdoc_macronames + 1;
1.1 kristaps 84: const char * const *mdoc_argnames = __mdoc_argnames;
85:
1.131 schwarze 86: static int mdoc_ptext(struct roff_man *, int, char *, int);
87: static int mdoc_pmacro(struct roff_man *, int, char *, int);
1.1 kristaps 88:
89:
1.123 schwarze 90: void
1.131 schwarze 91: mdoc_endparse(struct roff_man *mdoc)
1.1 kristaps 92: {
93:
1.121 schwarze 94: mdoc_macroend(mdoc);
1.81 schwarze 95: }
96:
1.1 kristaps 97: /*
98: * Main parse routine. Parses a single line -- really just hands off to
1.45 schwarze 99: * the macro (mdoc_pmacro()) or text parser (mdoc_ptext()).
1.1 kristaps 100: */
101: int
1.131 schwarze 102: mdoc_parseln(struct roff_man *mdoc, int ln, char *buf, int offs)
1.1 kristaps 103: {
104:
1.128 schwarze 105: if (mdoc->last->type != ROFFT_EQN || ln > mdoc->last->line)
1.117 schwarze 106: mdoc->flags |= MDOC_NEWLINE;
1.60 schwarze 107:
108: /*
109: * Let the roff nS register switch SYNOPSIS mode early,
110: * such that the parser knows at all times
111: * whether this mode is on or off.
112: * Note that this mode is also switched by the Sh macro.
113: */
1.94 schwarze 114: if (roff_getreg(mdoc->roff, "nS"))
115: mdoc->flags |= MDOC_SYNOPSIS;
116: else
117: mdoc->flags &= ~MDOC_SYNOPSIS;
1.60 schwarze 118:
1.93 schwarze 119: return(roff_getcontrol(mdoc->roff, buf, &offs) ?
1.103 schwarze 120: mdoc_pmacro(mdoc, ln, buf, offs) :
121: mdoc_ptext(mdoc, ln, buf, offs));
1.1 kristaps 122: }
123:
1.121 schwarze 124: void
1.58 schwarze 125: mdoc_macro(MACRO_PROT_ARGS)
1.1 kristaps 126: {
1.137 schwarze 127: assert(tok > TOKEN_NONE && tok < MDOC_MAX);
1.46 schwarze 128:
1.113 schwarze 129: if (mdoc->flags & MDOC_PBODY) {
130: if (tok == MDOC_Dt) {
131: mandoc_vmsg(MANDOCERR_DT_LATE,
132: mdoc->parse, line, ppos,
133: "Dt %s", buf + *pos);
1.121 schwarze 134: return;
1.113 schwarze 135: }
136: } else if ( ! (mdoc_macros[tok].flags & MDOC_PROLOGUE)) {
137: if (mdoc->meta.title == NULL) {
138: mandoc_vmsg(MANDOCERR_DT_NOTITLE,
139: mdoc->parse, line, ppos, "%s %s",
140: mdoc_macronames[tok], buf + *pos);
141: mdoc->meta.title = mandoc_strdup("UNTITLED");
142: }
1.93 schwarze 143: if (NULL == mdoc->meta.vol)
144: mdoc->meta.vol = mandoc_strdup("LOCAL");
145: mdoc->flags |= MDOC_PBODY;
1.39 schwarze 146: }
1.121 schwarze 147: (*mdoc_macros[tok].fp)(mdoc, tok, line, ppos, pos, buf);
1.1 kristaps 148: }
149:
1.120 schwarze 150: void
1.131 schwarze 151: mdoc_tail_alloc(struct roff_man *mdoc, int line, int pos, int tok)
1.1 kristaps 152: {
1.129 schwarze 153: struct roff_node *p;
1.1 kristaps 154:
1.136 schwarze 155: p = roff_node_alloc(mdoc, line, pos, ROFFT_TAIL, tok);
156: roff_node_append(mdoc, p);
1.131 schwarze 157: mdoc->next = ROFF_NEXT_CHILD;
1.59 schwarze 158: }
159:
1.129 schwarze 160: struct roff_node *
1.131 schwarze 161: mdoc_endbody_alloc(struct roff_man *mdoc, int line, int pos, int tok,
1.129 schwarze 162: struct roff_node *body, enum mdoc_endbody end)
1.59 schwarze 163: {
1.129 schwarze 164: struct roff_node *p;
1.59 schwarze 165:
1.126 schwarze 166: body->flags |= MDOC_ENDED;
167: body->parent->flags |= MDOC_ENDED;
1.136 schwarze 168: p = roff_node_alloc(mdoc, line, pos, ROFFT_BODY, tok);
1.126 schwarze 169: p->body = body;
1.92 schwarze 170: p->norm = body->norm;
1.59 schwarze 171: p->end = end;
1.136 schwarze 172: roff_node_append(mdoc, p);
1.131 schwarze 173: mdoc->next = ROFF_NEXT_SIBLING;
1.124 schwarze 174: return(p);
1.1 kristaps 175: }
176:
1.129 schwarze 177: struct roff_node *
1.131 schwarze 178: mdoc_block_alloc(struct roff_man *mdoc, int line, int pos,
1.129 schwarze 179: int tok, struct mdoc_arg *args)
1.1 kristaps 180: {
1.129 schwarze 181: struct roff_node *p;
1.1 kristaps 182:
1.136 schwarze 183: p = roff_node_alloc(mdoc, line, pos, ROFFT_BLOCK, tok);
1.4 schwarze 184: p->args = args;
185: if (p->args)
1.1 kristaps 186: (args->refcnt)++;
1.75 schwarze 187:
188: switch (tok) {
1.103 schwarze 189: case MDOC_Bd:
1.75 schwarze 190: /* FALLTHROUGH */
1.103 schwarze 191: case MDOC_Bf:
1.75 schwarze 192: /* FALLTHROUGH */
1.103 schwarze 193: case MDOC_Bl:
1.107 schwarze 194: /* FALLTHROUGH */
195: case MDOC_En:
1.75 schwarze 196: /* FALLTHROUGH */
1.103 schwarze 197: case MDOC_Rs:
1.75 schwarze 198: p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
199: break;
200: default:
201: break;
202: }
1.136 schwarze 203: roff_node_append(mdoc, p);
1.131 schwarze 204: mdoc->next = ROFF_NEXT_CHILD;
1.120 schwarze 205: return(p);
1.1 kristaps 206: }
207:
1.120 schwarze 208: void
1.131 schwarze 209: mdoc_elem_alloc(struct roff_man *mdoc, int line, int pos,
1.129 schwarze 210: int tok, struct mdoc_arg *args)
1.1 kristaps 211: {
1.129 schwarze 212: struct roff_node *p;
1.1 kristaps 213:
1.136 schwarze 214: p = roff_node_alloc(mdoc, line, pos, ROFFT_ELEM, tok);
1.4 schwarze 215: p->args = args;
216: if (p->args)
1.1 kristaps 217: (args->refcnt)++;
1.75 schwarze 218:
219: switch (tok) {
1.103 schwarze 220: case MDOC_An:
1.75 schwarze 221: p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
222: break;
223: default:
224: break;
225: }
1.136 schwarze 226: roff_node_append(mdoc, p);
1.131 schwarze 227: mdoc->next = ROFF_NEXT_CHILD;
1.1 kristaps 228: }
229:
1.120 schwarze 230: void
1.131 schwarze 231: mdoc_node_relink(struct roff_man *mdoc, struct roff_node *p)
1.91 schwarze 232: {
233:
1.136 schwarze 234: roff_node_unlink(mdoc, p);
235: roff_node_append(mdoc, p);
1.1 kristaps 236: }
237:
238: /*
239: * Parse free-form text, that is, a line that does not begin with the
240: * control character.
241: */
242: static int
1.131 schwarze 243: mdoc_ptext(struct roff_man *mdoc, int line, char *buf, int offs)
1.1 kristaps 244: {
1.129 schwarze 245: struct roff_node *n;
1.56 schwarze 246: char *c, *ws, *end;
1.46 schwarze 247:
1.93 schwarze 248: assert(mdoc->last);
249: n = mdoc->last;
1.56 schwarze 250:
251: /*
252: * Divert directly to list processing if we're encountering a
1.128 schwarze 253: * columnar ROFFT_BLOCK with or without a prior ROFFT_BLOCK entry
254: * (a ROFFT_BODY means it's already open, in which case we should
1.56 schwarze 255: * process within its context in the normal way).
256: */
257:
1.128 schwarze 258: if (n->tok == MDOC_Bl && n->type == ROFFT_BODY &&
1.127 schwarze 259: n->end == ENDBODY_NOT && n->norm->Bl.type == LIST_column) {
1.56 schwarze 260: /* `Bl' is open without any children. */
1.93 schwarze 261: mdoc->flags |= MDOC_FREECOL;
1.121 schwarze 262: mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf);
263: return(1);
1.56 schwarze 264: }
265:
1.128 schwarze 266: if (n->tok == MDOC_It && n->type == ROFFT_BLOCK &&
1.103 schwarze 267: NULL != n->parent &&
268: MDOC_Bl == n->parent->tok &&
269: LIST_column == n->parent->norm->Bl.type) {
1.56 schwarze 270: /* `Bl' has block-level `It' children. */
1.93 schwarze 271: mdoc->flags |= MDOC_FREECOL;
1.121 schwarze 272: mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf);
273: return(1);
1.56 schwarze 274: }
275:
1.52 schwarze 276: /*
277: * Search for the beginning of unescaped trailing whitespace (ws)
278: * and for the first character not to be output (end).
279: */
1.56 schwarze 280:
281: /* FIXME: replace with strcspn(). */
1.52 schwarze 282: ws = NULL;
1.53 schwarze 283: for (c = end = buf + offs; *c; c++) {
1.52 schwarze 284: switch (*c) {
285: case ' ':
286: if (NULL == ws)
287: ws = c;
288: continue;
289: case '\t':
290: /*
291: * Always warn about trailing tabs,
292: * even outside literal context,
293: * where they should be put on the next line.
294: */
295: if (NULL == ws)
296: ws = c;
297: /*
298: * Strip trailing tabs in literal context only;
299: * outside, they affect the next line.
300: */
1.93 schwarze 301: if (MDOC_LITERAL & mdoc->flags)
1.52 schwarze 302: continue;
303: break;
304: case '\\':
305: /* Skip the escaped character, too, if any. */
306: if (c[1])
307: c++;
308: /* FALLTHROUGH */
309: default:
310: ws = NULL;
311: break;
312: }
313: end = c + 1;
314: }
315: *end = '\0';
1.19 schwarze 316:
1.52 schwarze 317: if (ws)
1.108 schwarze 318: mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
319: line, (int)(ws-buf), NULL);
1.34 schwarze 320:
1.120 schwarze 321: if (buf[offs] == '\0' && ! (mdoc->flags & MDOC_LITERAL)) {
1.108 schwarze 322: mandoc_msg(MANDOCERR_FI_BLANK, mdoc->parse,
323: line, (int)(c - buf), NULL);
1.46 schwarze 324:
1.40 schwarze 325: /*
1.66 schwarze 326: * Insert a `sp' in the case of a blank line. Technically,
1.46 schwarze 327: * blank lines aren't allowed, but enough manuals assume this
328: * behaviour that we want to work around it.
1.40 schwarze 329: */
1.120 schwarze 330: mdoc_elem_alloc(mdoc, line, offs, MDOC_sp, NULL);
1.131 schwarze 331: mdoc->next = ROFF_NEXT_SIBLING;
1.119 schwarze 332: mdoc_valid_post(mdoc);
333: return(1);
1.38 schwarze 334: }
1.1 kristaps 335:
1.138 ! schwarze 336: roff_word_alloc(mdoc, line, offs, buf+offs);
1.1 kristaps 337:
1.120 schwarze 338: if (mdoc->flags & MDOC_LITERAL)
1.52 schwarze 339: return(1);
340:
1.35 schwarze 341: /*
1.48 schwarze 342: * End-of-sentence check. If the last character is an unescaped
343: * EOS character, then flag the node as being the end of a
344: * sentence. The front-end will know how to interpret this.
1.35 schwarze 345: */
346:
1.52 schwarze 347: assert(buf < end);
1.48 schwarze 348:
1.97 schwarze 349: if (mandoc_eos(buf+offs, (size_t)(end-buf-offs)))
1.93 schwarze 350: mdoc->last->flags |= MDOC_EOS;
1.1 kristaps 351: return(1);
352: }
1.19 schwarze 353:
1.1 kristaps 354: /*
355: * Parse a macro line, that is, a line beginning with the control
356: * character.
357: */
1.61 schwarze 358: static int
1.131 schwarze 359: mdoc_pmacro(struct roff_man *mdoc, int ln, char *buf, int offs)
1.1 kristaps 360: {
1.129 schwarze 361: struct roff_node *n;
1.118 schwarze 362: const char *cp;
1.129 schwarze 363: int tok;
1.83 schwarze 364: int i, sv;
1.56 schwarze 365: char mac[5];
1.1 kristaps 366:
1.83 schwarze 367: sv = offs;
1.47 schwarze 368:
1.103 schwarze 369: /*
1.64 schwarze 370: * Copy the first word into a nil-terminated buffer.
1.118 schwarze 371: * Stop when a space, tab, escape, or eoln is encountered.
1.63 schwarze 372: */
1.1 kristaps 373:
1.83 schwarze 374: i = 0;
1.118 schwarze 375: while (i < 4 && strchr(" \t\\", buf[offs]) == NULL)
1.83 schwarze 376: mac[i++] = buf[offs++];
377:
378: mac[i] = '\0';
379:
1.137 schwarze 380: tok = (i > 1 && i < 4) ? mdoc_hash_find(mac) : TOKEN_NONE;
1.1 kristaps 381:
1.137 schwarze 382: if (tok == TOKEN_NONE) {
1.112 schwarze 383: mandoc_msg(MANDOCERR_MACRO, mdoc->parse,
384: ln, sv, buf + sv - 1);
1.1 kristaps 385: return(1);
386: }
387:
1.118 schwarze 388: /* Skip a leading escape sequence or tab. */
1.63 schwarze 389:
1.118 schwarze 390: switch (buf[offs]) {
391: case '\\':
392: cp = buf + offs + 1;
393: mandoc_escape(&cp, NULL, NULL);
394: offs = cp - buf;
395: break;
396: case '\t':
1.83 schwarze 397: offs++;
1.118 schwarze 398: break;
399: default:
400: break;
401: }
1.63 schwarze 402:
403: /* Jump to the next non-whitespace word. */
1.1 kristaps 404:
1.83 schwarze 405: while (buf[offs] && ' ' == buf[offs])
406: offs++;
1.34 schwarze 407:
1.103 schwarze 408: /*
1.46 schwarze 409: * Trailing whitespace. Note that tabs are allowed to be passed
410: * into the parser as "text", so we only warn about spaces here.
411: */
1.34 schwarze 412:
1.83 schwarze 413: if ('\0' == buf[offs] && ' ' == buf[offs - 1])
1.108 schwarze 414: mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
415: ln, offs - 1, NULL);
1.1 kristaps 416:
1.56 schwarze 417: /*
418: * If an initial macro or a list invocation, divert directly
419: * into macro processing.
420: */
421:
1.121 schwarze 422: if (NULL == mdoc->last || MDOC_It == tok || MDOC_El == tok) {
423: mdoc_macro(mdoc, tok, ln, sv, &offs, buf);
424: return(1);
425: }
1.56 schwarze 426:
1.93 schwarze 427: n = mdoc->last;
428: assert(mdoc->last);
1.56 schwarze 429:
430: /*
431: * If the first macro of a `Bl -column', open an `It' block
432: * context around the parsed macro.
433: */
434:
1.128 schwarze 435: if (n->tok == MDOC_Bl && n->type == ROFFT_BODY &&
1.127 schwarze 436: n->end == ENDBODY_NOT && n->norm->Bl.type == LIST_column) {
1.93 schwarze 437: mdoc->flags |= MDOC_FREECOL;
1.121 schwarze 438: mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf);
439: return(1);
1.56 schwarze 440: }
441:
442: /*
443: * If we're following a block-level `It' within a `Bl -column'
444: * context (perhaps opened in the above block or in ptext()),
445: * then open an `It' block context around the parsed macro.
1.24 schwarze 446: */
1.56 schwarze 447:
1.128 schwarze 448: if (n->tok == MDOC_It && n->type == ROFFT_BLOCK &&
1.103 schwarze 449: NULL != n->parent &&
450: MDOC_Bl == n->parent->tok &&
451: LIST_column == n->parent->norm->Bl.type) {
1.93 schwarze 452: mdoc->flags |= MDOC_FREECOL;
1.121 schwarze 453: mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf);
454: return(1);
1.56 schwarze 455: }
456:
457: /* Normal processing of a macro. */
458:
1.121 schwarze 459: mdoc_macro(mdoc, tok, ln, sv, &offs, buf);
1.98 schwarze 460:
461: /* In quick mode (for mandocdb), abort after the NAME section. */
462:
463: if (mdoc->quick && MDOC_Sh == tok &&
464: SEC_NAME != mdoc->last->sec)
465: return(2);
1.1 kristaps 466:
467: return(1);
468: }
1.24 schwarze 469:
1.83 schwarze 470: enum mdelim
471: mdoc_isdelim(const char *p)
472: {
473:
474: if ('\0' == p[0])
475: return(DELIM_NONE);
476:
477: if ('\0' == p[1])
478: switch (p[0]) {
1.103 schwarze 479: case '(':
1.83 schwarze 480: /* FALLTHROUGH */
1.103 schwarze 481: case '[':
1.83 schwarze 482: return(DELIM_OPEN);
1.103 schwarze 483: case '|':
1.83 schwarze 484: return(DELIM_MIDDLE);
1.103 schwarze 485: case '.':
1.83 schwarze 486: /* FALLTHROUGH */
1.103 schwarze 487: case ',':
1.83 schwarze 488: /* FALLTHROUGH */
1.103 schwarze 489: case ';':
1.83 schwarze 490: /* FALLTHROUGH */
1.103 schwarze 491: case ':':
1.83 schwarze 492: /* FALLTHROUGH */
1.103 schwarze 493: case '?':
1.83 schwarze 494: /* FALLTHROUGH */
1.103 schwarze 495: case '!':
1.83 schwarze 496: /* FALLTHROUGH */
1.103 schwarze 497: case ')':
1.83 schwarze 498: /* FALLTHROUGH */
1.103 schwarze 499: case ']':
1.83 schwarze 500: return(DELIM_CLOSE);
501: default:
502: return(DELIM_NONE);
503: }
504:
505: if ('\\' != p[0])
506: return(DELIM_NONE);
1.24 schwarze 507:
1.83 schwarze 508: if (0 == strcmp(p + 1, "."))
509: return(DELIM_CLOSE);
1.90 schwarze 510: if (0 == strcmp(p + 1, "fR|\\fP"))
1.83 schwarze 511: return(DELIM_MIDDLE);
512:
513: return(DELIM_NONE);
1.101 schwarze 514: }
515:
516: void
1.129 schwarze 517: mdoc_deroff(char **dest, const struct roff_node *n)
1.101 schwarze 518: {
519: char *cp;
520: size_t sz;
521:
1.128 schwarze 522: if (n->type != ROFFT_TEXT) {
1.101 schwarze 523: for (n = n->child; n; n = n->next)
524: mdoc_deroff(dest, n);
525: return;
526: }
527:
528: /* Skip leading whitespace. */
529:
530: for (cp = n->string; '\0' != *cp; cp++)
531: if (0 == isspace((unsigned char)*cp))
532: break;
533:
534: /* Skip trailing whitespace. */
535:
536: for (sz = strlen(cp); sz; sz--)
537: if (0 == isspace((unsigned char)cp[sz-1]))
538: break;
539:
540: /* Skip empty strings. */
541:
542: if (0 == sz)
543: return;
544:
545: if (NULL == *dest) {
546: *dest = mandoc_strndup(cp, sz);
547: return;
548: }
549:
550: mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
551: free(*dest);
552: *dest = cp;
1.83 schwarze 553: }
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