Annotation of src/usr.bin/mandoc/roff.c, Revision 1.142
1.142 ! schwarze 1: /* $OpenBSD: roff.c,v 1.141 2015/04/23 16:17:04 schwarze Exp $ */
1.1 schwarze 2: /*
1.139 schwarze 3: * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.119 schwarze 4: * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
1.1 schwarze 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: *
1.16 schwarze 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
1.1 schwarze 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1.16 schwarze 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
1.1 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.
17: */
1.99 schwarze 18: #include <sys/types.h>
19:
1.1 schwarze 20: #include <assert.h>
1.3 schwarze 21: #include <ctype.h>
1.117 schwarze 22: #include <limits.h>
1.51 schwarze 23: #include <stdio.h>
1.1 schwarze 24: #include <stdlib.h>
25: #include <string.h>
26:
27: #include "mandoc.h"
1.74 schwarze 28: #include "mandoc_aux.h"
1.137 schwarze 29: #include "roff.h"
1.98 daniel 30: #include "libmandoc.h"
1.138 schwarze 31: #include "roff_int.h"
1.27 schwarze 32: #include "libroff.h"
1.1 schwarze 33:
1.37 schwarze 34: /* Maximum number of nested if-else conditionals. */
1.2 schwarze 35: #define RSTACK_MAX 128
36:
1.43 schwarze 37: /* Maximum number of string expansions per line, to break infinite loops. */
38: #define EXPAND_LIMIT 1000
39:
1.138 schwarze 40: /* --- data types --------------------------------------------------------- */
41:
1.1 schwarze 42: enum rofft {
1.123 schwarze 43: ROFF_ab,
1.20 schwarze 44: ROFF_ad,
1.123 schwarze 45: ROFF_af,
46: ROFF_aln,
47: ROFF_als,
1.2 schwarze 48: ROFF_am,
1.123 schwarze 49: ROFF_am1,
1.2 schwarze 50: ROFF_ami,
1.123 schwarze 51: ROFF_ami1,
1.66 schwarze 52: ROFF_as,
1.123 schwarze 53: ROFF_as1,
54: ROFF_asciify,
55: ROFF_backtrace,
56: ROFF_bd,
57: ROFF_bleedat,
58: ROFF_blm,
59: ROFF_box,
60: ROFF_boxa,
61: ROFF_bp,
62: ROFF_BP,
63: /* MAN_br, MDOC_br */
64: ROFF_break,
65: ROFF_breakchar,
66: ROFF_brnl,
67: ROFF_brp,
68: ROFF_brpnl,
69: ROFF_c2,
1.48 schwarze 70: ROFF_cc,
1.67 schwarze 71: ROFF_ce,
1.123 schwarze 72: ROFF_cf,
73: ROFF_cflags,
74: ROFF_ch,
75: ROFF_char,
76: ROFF_chop,
77: ROFF_class,
78: ROFF_close,
79: ROFF_CL,
80: ROFF_color,
81: ROFF_composite,
82: ROFF_continue,
83: ROFF_cp,
84: ROFF_cropat,
85: ROFF_cs,
86: ROFF_cu,
87: ROFF_da,
88: ROFF_dch,
89: ROFF_Dd,
1.1 schwarze 90: ROFF_de,
1.123 schwarze 91: ROFF_de1,
92: ROFF_defcolor,
1.1 schwarze 93: ROFF_dei,
1.123 schwarze 94: ROFF_dei1,
95: ROFF_device,
96: ROFF_devicem,
97: ROFF_di,
98: ROFF_do,
1.2 schwarze 99: ROFF_ds,
1.123 schwarze 100: ROFF_ds1,
101: ROFF_dwh,
102: ROFF_dt,
103: ROFF_ec,
104: ROFF_ecr,
105: ROFF_ecs,
1.2 schwarze 106: ROFF_el,
1.123 schwarze 107: ROFF_em,
108: ROFF_EN,
109: ROFF_eo,
110: ROFF_EP,
111: ROFF_EQ,
112: ROFF_errprint,
113: ROFF_ev,
114: ROFF_evc,
115: ROFF_ex,
116: ROFF_fallback,
1.58 schwarze 117: ROFF_fam,
1.123 schwarze 118: ROFF_fc,
119: ROFF_fchar,
120: ROFF_fcolor,
121: ROFF_fdeferlig,
122: ROFF_feature,
123: /* MAN_fi; ignored in mdoc(7) */
124: ROFF_fkern,
125: ROFF_fl,
126: ROFF_flig,
127: ROFF_fp,
128: ROFF_fps,
129: ROFF_fschar,
130: ROFF_fspacewidth,
131: ROFF_fspecial,
132: /* MAN_ft; ignored in mdoc(7) */
133: ROFF_ftr,
134: ROFF_fzoom,
135: ROFF_gcolor,
136: ROFF_hc,
137: ROFF_hcode,
138: ROFF_hidechar,
139: ROFF_hla,
140: ROFF_hlm,
141: ROFF_hpf,
142: ROFF_hpfa,
143: ROFF_hpfcode,
1.59 schwarze 144: ROFF_hw,
1.20 schwarze 145: ROFF_hy,
1.123 schwarze 146: ROFF_hylang,
147: ROFF_hylen,
148: ROFF_hym,
149: ROFF_hypp,
150: ROFF_hys,
1.2 schwarze 151: ROFF_ie,
152: ROFF_if,
1.1 schwarze 153: ROFF_ig,
1.123 schwarze 154: /* MAN_in; ignored in mdoc(7) */
155: ROFF_index,
1.30 schwarze 156: ROFF_it,
1.123 schwarze 157: ROFF_itc,
158: ROFF_IX,
159: ROFF_kern,
160: ROFF_kernafter,
161: ROFF_kernbefore,
162: ROFF_kernpair,
163: ROFF_lc,
164: ROFF_lc_ctype,
165: ROFF_lds,
166: ROFF_length,
167: ROFF_letadj,
168: ROFF_lf,
169: ROFF_lg,
170: ROFF_lhang,
171: ROFF_linetabs,
172: /* MAN_ll, MDOC_ll */
173: ROFF_lnr,
174: ROFF_lnrf,
175: ROFF_lpfx,
176: ROFF_ls,
177: ROFF_lsm,
178: ROFF_lt,
179: ROFF_mc,
180: ROFF_mediasize,
181: ROFF_minss,
182: ROFF_mk,
183: ROFF_mso,
1.128 schwarze 184: ROFF_na,
1.20 schwarze 185: ROFF_ne,
1.123 schwarze 186: /* MAN_nf; ignored in mdoc(7) */
1.20 schwarze 187: ROFF_nh,
1.123 schwarze 188: ROFF_nhychar,
189: ROFF_nm,
190: ROFF_nn,
191: ROFF_nop,
1.14 schwarze 192: ROFF_nr,
1.123 schwarze 193: ROFF_nrf,
194: ROFF_nroff,
1.31 schwarze 195: ROFF_ns,
1.123 schwarze 196: ROFF_nx,
197: ROFF_open,
198: ROFF_opena,
199: ROFF_os,
200: ROFF_output,
201: ROFF_padj,
202: ROFF_papersize,
203: ROFF_pc,
204: ROFF_pev,
205: ROFF_pi,
206: ROFF_PI,
1.101 schwarze 207: ROFF_pl,
1.123 schwarze 208: ROFF_pm,
209: ROFF_pn,
210: ROFF_pnr,
211: ROFF_po,
1.31 schwarze 212: ROFF_ps,
1.123 schwarze 213: ROFF_psbb,
214: ROFF_pshape,
215: ROFF_pso,
216: ROFF_ptr,
217: ROFF_pvs,
218: ROFF_rchar,
219: ROFF_rd,
220: ROFF_recursionlimit,
221: ROFF_return,
222: ROFF_rfschar,
223: ROFF_rhang,
224: ROFF_rj,
1.2 schwarze 225: ROFF_rm,
1.123 schwarze 226: ROFF_rn,
227: ROFF_rnn,
1.76 schwarze 228: ROFF_rr,
1.123 schwarze 229: ROFF_rs,
230: ROFF_rt,
231: ROFF_schar,
232: ROFF_sentchar,
233: ROFF_shc,
234: ROFF_shift,
235: ROFF_sizes,
1.14 schwarze 236: ROFF_so,
1.123 schwarze 237: /* MAN_sp, MDOC_sp */
238: ROFF_spacewidth,
239: ROFF_special,
240: ROFF_spreadwarn,
241: ROFF_ss,
242: ROFF_sty,
243: ROFF_substring,
244: ROFF_sv,
245: ROFF_sy,
246: ROFF_T_,
1.31 schwarze 247: ROFF_ta,
1.123 schwarze 248: ROFF_tc,
249: ROFF_TE,
250: ROFF_TH,
251: ROFF_ti,
252: ROFF_tkf,
253: ROFF_tl,
254: ROFF_tm,
255: ROFF_tm1,
256: ROFF_tmc,
1.2 schwarze 257: ROFF_tr,
1.123 schwarze 258: ROFF_track,
259: ROFF_transchar,
260: ROFF_trf,
261: ROFF_trimat,
262: ROFF_trin,
263: ROFF_trnt,
264: ROFF_troff,
1.27 schwarze 265: ROFF_TS,
1.123 schwarze 266: ROFF_uf,
267: ROFF_ul,
268: ROFF_unformat,
269: ROFF_unwatch,
270: ROFF_unwatchn,
271: ROFF_vpt,
272: ROFF_vs,
273: ROFF_warn,
274: ROFF_warnscale,
275: ROFF_watch,
276: ROFF_watchlength,
277: ROFF_watchn,
278: ROFF_wh,
279: ROFF_while,
280: ROFF_write,
281: ROFF_writec,
282: ROFF_writem,
283: ROFF_xflag,
1.2 schwarze 284: ROFF_cblock,
1.16 schwarze 285: ROFF_USERDEF,
1.1 schwarze 286: ROFF_MAX
287: };
288:
1.41 schwarze 289: /*
1.42 schwarze 290: * An incredibly-simple string buffer.
291: */
1.8 schwarze 292: struct roffstr {
1.42 schwarze 293: char *p; /* nil-terminated buffer */
294: size_t sz; /* saved strlen(p) */
295: };
296:
297: /*
298: * A key-value roffstr pair as part of a singly-linked list.
299: */
300: struct roffkv {
301: struct roffstr key;
302: struct roffstr val;
303: struct roffkv *next; /* next in list */
1.8 schwarze 304: };
305:
1.52 schwarze 306: /*
307: * A single number register as part of a singly-linked list.
308: */
309: struct roffreg {
310: struct roffstr key;
1.53 schwarze 311: int val;
1.52 schwarze 312: struct roffreg *next;
313: };
314:
1.1 schwarze 315: struct roff {
1.35 schwarze 316: struct mparse *parse; /* parse point */
1.109 schwarze 317: const struct mchars *mchars; /* character table */
1.1 schwarze 318: struct roffnode *last; /* leaf of stack */
1.96 schwarze 319: int *rstack; /* stack of inverted `ie' values */
1.52 schwarze 320: struct roffreg *regtab; /* number registers */
1.42 schwarze 321: struct roffkv *strtab; /* user-defined strings & macros */
322: struct roffkv *xmbtab; /* multi-byte trans table (`tr') */
323: struct roffstr *xtab; /* single-byte trans table (`tr') */
1.16 schwarze 324: const char *current_string; /* value of last called user macro */
1.27 schwarze 325: struct tbl_node *first_tbl; /* first table parsed */
326: struct tbl_node *last_tbl; /* last table parsed */
327: struct tbl_node *tbl; /* current table being parsed */
1.32 schwarze 328: struct eqn_node *last_eqn; /* last equation parsed */
329: struct eqn_node *first_eqn; /* first equation parsed */
330: struct eqn_node *eqn; /* current equation being parsed */
1.102 schwarze 331: int eqn_inline; /* current equation is inline */
1.96 schwarze 332: int options; /* parse options */
333: int rstacksz; /* current size limit of rstack */
334: int rstackpos; /* position in rstack */
1.99 schwarze 335: int format; /* current file in mdoc or man format */
1.96 schwarze 336: char control; /* control character */
1.1 schwarze 337: };
338:
339: struct roffnode {
340: enum rofft tok; /* type of node */
341: struct roffnode *parent; /* up one in stack */
342: int line; /* parse line */
343: int col; /* parse col */
1.16 schwarze 344: char *name; /* node name, e.g. macro name */
1.2 schwarze 345: char *end; /* end-rules: custom token */
346: int endspan; /* end-rules: next-line or infty */
1.71 schwarze 347: int rule; /* current evaluation rule */
1.1 schwarze 348: };
349:
350: #define ROFF_ARGS struct roff *r, /* parse ctx */ \
351: enum rofft tok, /* tok of macro */ \
1.110 schwarze 352: struct buf *buf, /* input buffer */ \
1.1 schwarze 353: int ln, /* parse line */ \
1.2 schwarze 354: int ppos, /* original pos in buffer */ \
355: int pos, /* current pos in buffer */ \
356: int *offs /* reset offset of buffer data */
1.1 schwarze 357:
358: typedef enum rofferr (*roffproc)(ROFF_ARGS);
359:
360: struct roffmac {
361: const char *name; /* macro name */
1.2 schwarze 362: roffproc proc; /* process new macro */
363: roffproc text; /* process as child text of macro */
364: roffproc sub; /* process as child of macro */
365: int flags;
366: #define ROFFMAC_STRUCT (1 << 0) /* always interpret */
1.3 schwarze 367: struct roffmac *next;
1.1 schwarze 368: };
369:
1.37 schwarze 370: struct predef {
371: const char *name; /* predefined input name */
372: const char *str; /* replacement symbol */
373: };
374:
375: #define PREDEF(__name, __str) \
376: { (__name), (__str) },
377:
1.138 schwarze 378: /* --- function prototypes ------------------------------------------------ */
379:
1.42 schwarze 380: static enum rofft roffhash_find(const char *, size_t);
381: static void roffhash_init(void);
382: static void roffnode_cleanscope(struct roff *);
383: static void roffnode_pop(struct roff *);
384: static void roffnode_push(struct roff *, enum rofft,
385: const char *, int, int);
1.2 schwarze 386: static enum rofferr roff_block(ROFF_ARGS);
387: static enum rofferr roff_block_text(ROFF_ARGS);
388: static enum rofferr roff_block_sub(ROFF_ARGS);
1.123 schwarze 389: static enum rofferr roff_brp(ROFF_ARGS);
1.2 schwarze 390: static enum rofferr roff_cblock(ROFF_ARGS);
1.48 schwarze 391: static enum rofferr roff_cc(ROFF_ARGS);
1.68 schwarze 392: static void roff_ccond(struct roff *, int, int);
1.2 schwarze 393: static enum rofferr roff_cond(ROFF_ARGS);
394: static enum rofferr roff_cond_text(ROFF_ARGS);
395: static enum rofferr roff_cond_sub(ROFF_ARGS);
1.7 schwarze 396: static enum rofferr roff_ds(ROFF_ARGS);
1.110 schwarze 397: static enum rofferr roff_eqndelim(struct roff *, struct buf *, int);
1.106 schwarze 398: static int roff_evalcond(struct roff *r, int,
399: const char *, int *);
400: static int roff_evalnum(struct roff *, int,
401: const char *, int *, int *, int);
402: static int roff_evalpar(struct roff *, int,
1.133 schwarze 403: const char *, int *, int *, int);
1.71 schwarze 404: static int roff_evalstrcond(const char *, int *);
1.42 schwarze 405: static void roff_free1(struct roff *);
1.52 schwarze 406: static void roff_freereg(struct roffreg *);
1.42 schwarze 407: static void roff_freestr(struct roffkv *);
1.85 schwarze 408: static size_t roff_getname(struct roff *, char **, int, int);
1.133 schwarze 409: static int roff_getnum(const char *, int *, int *, int);
1.56 schwarze 410: static int roff_getop(const char *, int *, char *);
1.53 schwarze 411: static int roff_getregn(const struct roff *,
412: const char *, size_t);
1.65 schwarze 413: static int roff_getregro(const char *name);
1.80 schwarze 414: static const char *roff_getstrn(const struct roff *,
1.8 schwarze 415: const char *, size_t);
1.123 schwarze 416: static enum rofferr roff_insec(ROFF_ARGS);
1.51 schwarze 417: static enum rofferr roff_it(ROFF_ARGS);
1.21 schwarze 418: static enum rofferr roff_line_ignore(ROFF_ARGS);
1.137 schwarze 419: static void roff_man_alloc1(struct roff_man *);
420: static void roff_man_free1(struct roff_man *);
1.6 schwarze 421: static enum rofferr roff_nr(ROFF_ARGS);
1.87 schwarze 422: static enum rofft roff_parse(struct roff *, char *, int *,
423: int, int);
1.110 schwarze 424: static enum rofferr roff_parsetext(struct buf *, int, int *);
425: static enum rofferr roff_res(struct roff *, struct buf *, int, int);
1.29 schwarze 426: static enum rofferr roff_rm(ROFF_ARGS);
1.76 schwarze 427: static enum rofferr roff_rr(ROFF_ARGS);
1.8 schwarze 428: static void roff_setstr(struct roff *,
1.16 schwarze 429: const char *, const char *, int);
1.80 schwarze 430: static void roff_setstrn(struct roffkv **, const char *,
1.42 schwarze 431: size_t, const char *, size_t, int);
1.14 schwarze 432: static enum rofferr roff_so(ROFF_ARGS);
1.42 schwarze 433: static enum rofferr roff_tr(ROFF_ARGS);
1.47 schwarze 434: static enum rofferr roff_Dd(ROFF_ARGS);
435: static enum rofferr roff_TH(ROFF_ARGS);
1.27 schwarze 436: static enum rofferr roff_TE(ROFF_ARGS);
437: static enum rofferr roff_TS(ROFF_ARGS);
1.32 schwarze 438: static enum rofferr roff_EQ(ROFF_ARGS);
439: static enum rofferr roff_EN(ROFF_ARGS);
1.27 schwarze 440: static enum rofferr roff_T_(ROFF_ARGS);
1.123 schwarze 441: static enum rofferr roff_unsupp(ROFF_ARGS);
1.16 schwarze 442: static enum rofferr roff_userdef(ROFF_ARGS);
1.1 schwarze 443:
1.138 schwarze 444: /* --- constant data ------------------------------------------------------ */
445:
1.42 schwarze 446: /* See roffhash_find() */
1.3 schwarze 447:
448: #define ASCII_HI 126
449: #define ASCII_LO 33
450: #define HASHWIDTH (ASCII_HI - ASCII_LO + 1)
451:
1.133 schwarze 452: #define ROFFNUM_SCALE (1 << 0) /* Honour scaling in roff_getnum(). */
453: #define ROFFNUM_WHITE (1 << 1) /* Skip whitespace in roff_evalnum(). */
454:
1.3 schwarze 455: static struct roffmac *hash[HASHWIDTH];
456:
457: static struct roffmac roffs[ROFF_MAX] = {
1.123 schwarze 458: { "ab", roff_unsupp, NULL, NULL, 0, NULL },
1.21 schwarze 459: { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
1.123 schwarze 460: { "af", roff_line_ignore, NULL, NULL, 0, NULL },
461: { "aln", roff_unsupp, NULL, NULL, 0, NULL },
462: { "als", roff_unsupp, NULL, NULL, 0, NULL },
1.3 schwarze 463: { "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.123 schwarze 464: { "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.3 schwarze 465: { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.123 schwarze 466: { "ami1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.66 schwarze 467: { "as", roff_ds, NULL, NULL, 0, NULL },
1.123 schwarze 468: { "as1", roff_ds, NULL, NULL, 0, NULL },
469: { "asciify", roff_unsupp, NULL, NULL, 0, NULL },
470: { "backtrace", roff_line_ignore, NULL, NULL, 0, NULL },
471: { "bd", roff_line_ignore, NULL, NULL, 0, NULL },
472: { "bleedat", roff_line_ignore, NULL, NULL, 0, NULL },
473: { "blm", roff_unsupp, NULL, NULL, 0, NULL },
474: { "box", roff_unsupp, NULL, NULL, 0, NULL },
475: { "boxa", roff_unsupp, NULL, NULL, 0, NULL },
476: { "bp", roff_line_ignore, NULL, NULL, 0, NULL },
477: { "BP", roff_unsupp, NULL, NULL, 0, NULL },
478: { "break", roff_unsupp, NULL, NULL, 0, NULL },
479: { "breakchar", roff_line_ignore, NULL, NULL, 0, NULL },
480: { "brnl", roff_line_ignore, NULL, NULL, 0, NULL },
481: { "brp", roff_brp, NULL, NULL, 0, NULL },
482: { "brpnl", roff_line_ignore, NULL, NULL, 0, NULL },
483: { "c2", roff_unsupp, NULL, NULL, 0, NULL },
1.48 schwarze 484: { "cc", roff_cc, NULL, NULL, 0, NULL },
1.67 schwarze 485: { "ce", roff_line_ignore, NULL, NULL, 0, NULL },
1.123 schwarze 486: { "cf", roff_insec, NULL, NULL, 0, NULL },
487: { "cflags", roff_line_ignore, NULL, NULL, 0, NULL },
488: { "ch", roff_line_ignore, NULL, NULL, 0, NULL },
489: { "char", roff_unsupp, NULL, NULL, 0, NULL },
490: { "chop", roff_unsupp, NULL, NULL, 0, NULL },
491: { "class", roff_line_ignore, NULL, NULL, 0, NULL },
492: { "close", roff_insec, NULL, NULL, 0, NULL },
493: { "CL", roff_unsupp, NULL, NULL, 0, NULL },
494: { "color", roff_line_ignore, NULL, NULL, 0, NULL },
495: { "composite", roff_unsupp, NULL, NULL, 0, NULL },
496: { "continue", roff_unsupp, NULL, NULL, 0, NULL },
497: { "cp", roff_line_ignore, NULL, NULL, 0, NULL },
498: { "cropat", roff_line_ignore, NULL, NULL, 0, NULL },
499: { "cs", roff_line_ignore, NULL, NULL, 0, NULL },
500: { "cu", roff_line_ignore, NULL, NULL, 0, NULL },
501: { "da", roff_unsupp, NULL, NULL, 0, NULL },
502: { "dch", roff_unsupp, NULL, NULL, 0, NULL },
503: { "Dd", roff_Dd, NULL, NULL, 0, NULL },
1.3 schwarze 504: { "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.123 schwarze 505: { "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
506: { "defcolor", roff_line_ignore, NULL, NULL, 0, NULL },
1.3 schwarze 507: { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.123 schwarze 508: { "dei1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
509: { "device", roff_unsupp, NULL, NULL, 0, NULL },
510: { "devicem", roff_unsupp, NULL, NULL, 0, NULL },
511: { "di", roff_unsupp, NULL, NULL, 0, NULL },
512: { "do", roff_unsupp, NULL, NULL, 0, NULL },
1.7 schwarze 513: { "ds", roff_ds, NULL, NULL, 0, NULL },
1.123 schwarze 514: { "ds1", roff_ds, NULL, NULL, 0, NULL },
515: { "dwh", roff_unsupp, NULL, NULL, 0, NULL },
516: { "dt", roff_unsupp, NULL, NULL, 0, NULL },
517: { "ec", roff_unsupp, NULL, NULL, 0, NULL },
518: { "ecr", roff_unsupp, NULL, NULL, 0, NULL },
519: { "ecs", roff_unsupp, NULL, NULL, 0, NULL },
1.3 schwarze 520: { "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
1.123 schwarze 521: { "em", roff_unsupp, NULL, NULL, 0, NULL },
522: { "EN", roff_EN, NULL, NULL, 0, NULL },
523: { "eo", roff_unsupp, NULL, NULL, 0, NULL },
524: { "EP", roff_unsupp, NULL, NULL, 0, NULL },
525: { "EQ", roff_EQ, NULL, NULL, 0, NULL },
526: { "errprint", roff_line_ignore, NULL, NULL, 0, NULL },
527: { "ev", roff_unsupp, NULL, NULL, 0, NULL },
528: { "evc", roff_unsupp, NULL, NULL, 0, NULL },
529: { "ex", roff_unsupp, NULL, NULL, 0, NULL },
530: { "fallback", roff_line_ignore, NULL, NULL, 0, NULL },
1.58 schwarze 531: { "fam", roff_line_ignore, NULL, NULL, 0, NULL },
1.123 schwarze 532: { "fc", roff_unsupp, NULL, NULL, 0, NULL },
533: { "fchar", roff_unsupp, NULL, NULL, 0, NULL },
534: { "fcolor", roff_line_ignore, NULL, NULL, 0, NULL },
535: { "fdeferlig", roff_line_ignore, NULL, NULL, 0, NULL },
536: { "feature", roff_line_ignore, NULL, NULL, 0, NULL },
537: { "fkern", roff_line_ignore, NULL, NULL, 0, NULL },
538: { "fl", roff_line_ignore, NULL, NULL, 0, NULL },
539: { "flig", roff_line_ignore, NULL, NULL, 0, NULL },
540: { "fp", roff_line_ignore, NULL, NULL, 0, NULL },
541: { "fps", roff_line_ignore, NULL, NULL, 0, NULL },
542: { "fschar", roff_unsupp, NULL, NULL, 0, NULL },
543: { "fspacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
544: { "fspecial", roff_line_ignore, NULL, NULL, 0, NULL },
545: { "ftr", roff_line_ignore, NULL, NULL, 0, NULL },
546: { "fzoom", roff_line_ignore, NULL, NULL, 0, NULL },
547: { "gcolor", roff_line_ignore, NULL, NULL, 0, NULL },
548: { "hc", roff_line_ignore, NULL, NULL, 0, NULL },
549: { "hcode", roff_line_ignore, NULL, NULL, 0, NULL },
550: { "hidechar", roff_line_ignore, NULL, NULL, 0, NULL },
551: { "hla", roff_line_ignore, NULL, NULL, 0, NULL },
552: { "hlm", roff_line_ignore, NULL, NULL, 0, NULL },
553: { "hpf", roff_line_ignore, NULL, NULL, 0, NULL },
554: { "hpfa", roff_line_ignore, NULL, NULL, 0, NULL },
555: { "hpfcode", roff_line_ignore, NULL, NULL, 0, NULL },
1.59 schwarze 556: { "hw", roff_line_ignore, NULL, NULL, 0, NULL },
1.21 schwarze 557: { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
1.123 schwarze 558: { "hylang", roff_line_ignore, NULL, NULL, 0, NULL },
559: { "hylen", roff_line_ignore, NULL, NULL, 0, NULL },
560: { "hym", roff_line_ignore, NULL, NULL, 0, NULL },
561: { "hypp", roff_line_ignore, NULL, NULL, 0, NULL },
562: { "hys", roff_line_ignore, NULL, NULL, 0, NULL },
1.3 schwarze 563: { "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
564: { "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
565: { "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
1.123 schwarze 566: { "index", roff_unsupp, NULL, NULL, 0, NULL },
1.51 schwarze 567: { "it", roff_it, NULL, NULL, 0, NULL },
1.123 schwarze 568: { "itc", roff_unsupp, NULL, NULL, 0, NULL },
569: { "IX", roff_line_ignore, NULL, NULL, 0, NULL },
570: { "kern", roff_line_ignore, NULL, NULL, 0, NULL },
571: { "kernafter", roff_line_ignore, NULL, NULL, 0, NULL },
572: { "kernbefore", roff_line_ignore, NULL, NULL, 0, NULL },
573: { "kernpair", roff_line_ignore, NULL, NULL, 0, NULL },
574: { "lc", roff_unsupp, NULL, NULL, 0, NULL },
575: { "lc_ctype", roff_unsupp, NULL, NULL, 0, NULL },
576: { "lds", roff_unsupp, NULL, NULL, 0, NULL },
577: { "length", roff_unsupp, NULL, NULL, 0, NULL },
578: { "letadj", roff_line_ignore, NULL, NULL, 0, NULL },
579: { "lf", roff_insec, NULL, NULL, 0, NULL },
580: { "lg", roff_line_ignore, NULL, NULL, 0, NULL },
581: { "lhang", roff_line_ignore, NULL, NULL, 0, NULL },
582: { "linetabs", roff_unsupp, NULL, NULL, 0, NULL },
583: { "lnr", roff_unsupp, NULL, NULL, 0, NULL },
584: { "lnrf", roff_unsupp, NULL, NULL, 0, NULL },
585: { "lpfx", roff_unsupp, NULL, NULL, 0, NULL },
586: { "ls", roff_line_ignore, NULL, NULL, 0, NULL },
587: { "lsm", roff_unsupp, NULL, NULL, 0, NULL },
588: { "lt", roff_line_ignore, NULL, NULL, 0, NULL },
589: { "mc", roff_line_ignore, NULL, NULL, 0, NULL },
590: { "mediasize", roff_line_ignore, NULL, NULL, 0, NULL },
591: { "minss", roff_line_ignore, NULL, NULL, 0, NULL },
592: { "mk", roff_line_ignore, NULL, NULL, 0, NULL },
593: { "mso", roff_insec, NULL, NULL, 0, NULL },
1.128 schwarze 594: { "na", roff_line_ignore, NULL, NULL, 0, NULL },
1.21 schwarze 595: { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
596: { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
1.123 schwarze 597: { "nhychar", roff_line_ignore, NULL, NULL, 0, NULL },
598: { "nm", roff_unsupp, NULL, NULL, 0, NULL },
599: { "nn", roff_unsupp, NULL, NULL, 0, NULL },
600: { "nop", roff_unsupp, NULL, NULL, 0, NULL },
1.14 schwarze 601: { "nr", roff_nr, NULL, NULL, 0, NULL },
1.123 schwarze 602: { "nrf", roff_unsupp, NULL, NULL, 0, NULL },
603: { "nroff", roff_line_ignore, NULL, NULL, 0, NULL },
1.31 schwarze 604: { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
1.123 schwarze 605: { "nx", roff_insec, NULL, NULL, 0, NULL },
606: { "open", roff_insec, NULL, NULL, 0, NULL },
607: { "opena", roff_insec, NULL, NULL, 0, NULL },
608: { "os", roff_line_ignore, NULL, NULL, 0, NULL },
609: { "output", roff_unsupp, NULL, NULL, 0, NULL },
610: { "padj", roff_line_ignore, NULL, NULL, 0, NULL },
611: { "papersize", roff_line_ignore, NULL, NULL, 0, NULL },
612: { "pc", roff_line_ignore, NULL, NULL, 0, NULL },
613: { "pev", roff_line_ignore, NULL, NULL, 0, NULL },
614: { "pi", roff_insec, NULL, NULL, 0, NULL },
615: { "PI", roff_unsupp, NULL, NULL, 0, NULL },
1.101 schwarze 616: { "pl", roff_line_ignore, NULL, NULL, 0, NULL },
1.123 schwarze 617: { "pm", roff_line_ignore, NULL, NULL, 0, NULL },
618: { "pn", roff_line_ignore, NULL, NULL, 0, NULL },
619: { "pnr", roff_line_ignore, NULL, NULL, 0, NULL },
620: { "po", roff_line_ignore, NULL, NULL, 0, NULL },
1.31 schwarze 621: { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
1.123 schwarze 622: { "psbb", roff_unsupp, NULL, NULL, 0, NULL },
1.127 schwarze 623: { "pshape", roff_unsupp, NULL, NULL, 0, NULL },
1.123 schwarze 624: { "pso", roff_insec, NULL, NULL, 0, NULL },
625: { "ptr", roff_line_ignore, NULL, NULL, 0, NULL },
626: { "pvs", roff_line_ignore, NULL, NULL, 0, NULL },
627: { "rchar", roff_unsupp, NULL, NULL, 0, NULL },
628: { "rd", roff_line_ignore, NULL, NULL, 0, NULL },
629: { "recursionlimit", roff_line_ignore, NULL, NULL, 0, NULL },
630: { "return", roff_unsupp, NULL, NULL, 0, NULL },
631: { "rfschar", roff_unsupp, NULL, NULL, 0, NULL },
632: { "rhang", roff_line_ignore, NULL, NULL, 0, NULL },
633: { "rj", roff_line_ignore, NULL, NULL, 0, NULL },
1.29 schwarze 634: { "rm", roff_rm, NULL, NULL, 0, NULL },
1.123 schwarze 635: { "rn", roff_unsupp, NULL, NULL, 0, NULL },
636: { "rnn", roff_unsupp, NULL, NULL, 0, NULL },
1.76 schwarze 637: { "rr", roff_rr, NULL, NULL, 0, NULL },
1.123 schwarze 638: { "rs", roff_line_ignore, NULL, NULL, 0, NULL },
639: { "rt", roff_line_ignore, NULL, NULL, 0, NULL },
640: { "schar", roff_unsupp, NULL, NULL, 0, NULL },
641: { "sentchar", roff_line_ignore, NULL, NULL, 0, NULL },
642: { "shc", roff_line_ignore, NULL, NULL, 0, NULL },
643: { "shift", roff_unsupp, NULL, NULL, 0, NULL },
644: { "sizes", roff_line_ignore, NULL, NULL, 0, NULL },
1.14 schwarze 645: { "so", roff_so, NULL, NULL, 0, NULL },
1.123 schwarze 646: { "spacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
647: { "special", roff_line_ignore, NULL, NULL, 0, NULL },
648: { "spreadwarn", roff_line_ignore, NULL, NULL, 0, NULL },
649: { "ss", roff_line_ignore, NULL, NULL, 0, NULL },
650: { "sty", roff_line_ignore, NULL, NULL, 0, NULL },
651: { "substring", roff_unsupp, NULL, NULL, 0, NULL },
652: { "sv", roff_line_ignore, NULL, NULL, 0, NULL },
653: { "sy", roff_insec, NULL, NULL, 0, NULL },
654: { "T&", roff_T_, NULL, NULL, 0, NULL },
1.127 schwarze 655: { "ta", roff_unsupp, NULL, NULL, 0, NULL },
1.123 schwarze 656: { "tc", roff_unsupp, NULL, NULL, 0, NULL },
657: { "TE", roff_TE, NULL, NULL, 0, NULL },
658: { "TH", roff_TH, NULL, NULL, 0, NULL },
1.127 schwarze 659: { "ti", roff_unsupp, NULL, NULL, 0, NULL },
1.123 schwarze 660: { "tkf", roff_line_ignore, NULL, NULL, 0, NULL },
661: { "tl", roff_unsupp, NULL, NULL, 0, NULL },
662: { "tm", roff_line_ignore, NULL, NULL, 0, NULL },
663: { "tm1", roff_line_ignore, NULL, NULL, 0, NULL },
664: { "tmc", roff_line_ignore, NULL, NULL, 0, NULL },
1.42 schwarze 665: { "tr", roff_tr, NULL, NULL, 0, NULL },
1.123 schwarze 666: { "track", roff_line_ignore, NULL, NULL, 0, NULL },
667: { "transchar", roff_line_ignore, NULL, NULL, 0, NULL },
668: { "trf", roff_insec, NULL, NULL, 0, NULL },
669: { "trimat", roff_line_ignore, NULL, NULL, 0, NULL },
670: { "trin", roff_unsupp, NULL, NULL, 0, NULL },
671: { "trnt", roff_unsupp, NULL, NULL, 0, NULL },
672: { "troff", roff_line_ignore, NULL, NULL, 0, NULL },
1.27 schwarze 673: { "TS", roff_TS, NULL, NULL, 0, NULL },
1.123 schwarze 674: { "uf", roff_line_ignore, NULL, NULL, 0, NULL },
675: { "ul", roff_line_ignore, NULL, NULL, 0, NULL },
676: { "unformat", roff_unsupp, NULL, NULL, 0, NULL },
677: { "unwatch", roff_line_ignore, NULL, NULL, 0, NULL },
678: { "unwatchn", roff_line_ignore, NULL, NULL, 0, NULL },
679: { "vpt", roff_line_ignore, NULL, NULL, 0, NULL },
680: { "vs", roff_line_ignore, NULL, NULL, 0, NULL },
681: { "warn", roff_line_ignore, NULL, NULL, 0, NULL },
682: { "warnscale", roff_line_ignore, NULL, NULL, 0, NULL },
683: { "watch", roff_line_ignore, NULL, NULL, 0, NULL },
684: { "watchlength", roff_line_ignore, NULL, NULL, 0, NULL },
685: { "watchn", roff_line_ignore, NULL, NULL, 0, NULL },
686: { "wh", roff_unsupp, NULL, NULL, 0, NULL },
687: { "while", roff_unsupp, NULL, NULL, 0, NULL },
688: { "write", roff_insec, NULL, NULL, 0, NULL },
689: { "writec", roff_insec, NULL, NULL, 0, NULL },
690: { "writem", roff_insec, NULL, NULL, 0, NULL },
691: { "xflag", roff_line_ignore, NULL, NULL, 0, NULL },
1.3 schwarze 692: { ".", roff_cblock, NULL, NULL, 0, NULL },
1.16 schwarze 693: { NULL, roff_userdef, NULL, NULL, 0, NULL },
1.1 schwarze 694: };
695:
1.73 schwarze 696: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.47 schwarze 697: const char *const __mdoc_reserved[] = {
698: "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
699: "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
700: "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
701: "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.73 schwarze 702: "Dt", "Dv", "Dx", "D1",
703: "Ec", "Ed", "Ef", "Ek", "El", "Em",
704: "En", "Eo", "Er", "Es", "Ev", "Ex",
1.47 schwarze 705: "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.73 schwarze 706: "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
707: "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.47 schwarze 708: "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.73 schwarze 709: "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
710: "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
711: "Sc", "Sh", "Sm", "So", "Sq",
1.47 schwarze 712: "Ss", "St", "Sx", "Sy",
713: "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.73 schwarze 714: "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.47 schwarze 715: "%P", "%Q", "%R", "%T", "%U", "%V",
716: NULL
717: };
718:
1.73 schwarze 719: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.47 schwarze 720: const char *const __man_reserved[] = {
1.73 schwarze 721: "AT", "B", "BI", "BR", "DT",
722: "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
723: "LP", "OP", "P", "PD", "PP",
724: "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
725: "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.47 schwarze 726: NULL
727: };
728:
1.37 schwarze 729: /* Array of injected predefined strings. */
730: #define PREDEFS_MAX 38
731: static const struct predef predefs[PREDEFS_MAX] = {
732: #include "predefs.in"
733: };
734:
1.42 schwarze 735: /* See roffhash_find() */
1.3 schwarze 736: #define ROFF_HASH(p) (p[0] - ASCII_LO)
737:
1.51 schwarze 738: static int roffit_lines; /* number of lines to delay */
739: static char *roffit_macro; /* nil-terminated macro line */
740:
1.80 schwarze 741:
1.138 schwarze 742: /* --- request table ------------------------------------------------------ */
743:
1.3 schwarze 744: static void
1.42 schwarze 745: roffhash_init(void)
1.3 schwarze 746: {
747: struct roffmac *n;
748: int buc, i;
749:
1.16 schwarze 750: for (i = 0; i < (int)ROFF_USERDEF; i++) {
1.3 schwarze 751: assert(roffs[i].name[0] >= ASCII_LO);
752: assert(roffs[i].name[0] <= ASCII_HI);
753:
754: buc = ROFF_HASH(roffs[i].name);
755:
756: if (NULL != (n = hash[buc])) {
757: for ( ; n->next; n = n->next)
758: /* Do nothing. */ ;
759: n->next = &roffs[i];
760: } else
761: hash[buc] = &roffs[i];
762: }
763: }
764:
1.1 schwarze 765: /*
766: * Look up a roff token by its name. Returns ROFF_MAX if no macro by
767: * the nil-terminated string name could be found.
768: */
769: static enum rofft
1.42 schwarze 770: roffhash_find(const char *p, size_t s)
1.1 schwarze 771: {
1.3 schwarze 772: int buc;
773: struct roffmac *n;
1.1 schwarze 774:
1.3 schwarze 775: /*
776: * libroff has an extremely simple hashtable, for the time
777: * being, which simply keys on the first character, which must
778: * be printable, then walks a chain. It works well enough until
779: * optimised.
780: */
781:
782: if (p[0] < ASCII_LO || p[0] > ASCII_HI)
783: return(ROFF_MAX);
784:
785: buc = ROFF_HASH(p);
786:
787: if (NULL == (n = hash[buc]))
788: return(ROFF_MAX);
789: for ( ; n; n = n->next)
1.16 schwarze 790: if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
1.3 schwarze 791: return((enum rofft)(n - roffs));
1.1 schwarze 792:
793: return(ROFF_MAX);
794: }
795:
1.138 schwarze 796: /* --- stack of request blocks -------------------------------------------- */
797:
1.1 schwarze 798: /*
799: * Pop the current node off of the stack of roff instructions currently
800: * pending.
801: */
802: static void
803: roffnode_pop(struct roff *r)
804: {
805: struct roffnode *p;
806:
1.2 schwarze 807: assert(r->last);
1.80 schwarze 808: p = r->last;
1.2 schwarze 809:
810: r->last = r->last->parent;
1.16 schwarze 811: free(p->name);
812: free(p->end);
1.1 schwarze 813: free(p);
814: }
815:
816: /*
817: * Push a roff node onto the instruction stack. This must later be
818: * removed with roffnode_pop().
819: */
1.11 schwarze 820: static void
1.16 schwarze 821: roffnode_push(struct roff *r, enum rofft tok, const char *name,
822: int line, int col)
1.1 schwarze 823: {
824: struct roffnode *p;
825:
1.11 schwarze 826: p = mandoc_calloc(1, sizeof(struct roffnode));
1.1 schwarze 827: p->tok = tok;
1.16 schwarze 828: if (name)
829: p->name = mandoc_strdup(name);
1.1 schwarze 830: p->parent = r->last;
831: p->line = line;
832: p->col = col;
1.71 schwarze 833: p->rule = p->parent ? p->parent->rule : 0;
1.1 schwarze 834:
835: r->last = p;
836: }
837:
1.138 schwarze 838: /* --- roff parser state data management ---------------------------------- */
839:
1.1 schwarze 840: static void
841: roff_free1(struct roff *r)
842: {
1.49 schwarze 843: struct tbl_node *tbl;
1.32 schwarze 844: struct eqn_node *e;
1.42 schwarze 845: int i;
1.27 schwarze 846:
1.49 schwarze 847: while (NULL != (tbl = r->first_tbl)) {
848: r->first_tbl = tbl->next;
849: tbl_free(tbl);
1.27 schwarze 850: }
851: r->first_tbl = r->last_tbl = r->tbl = NULL;
1.1 schwarze 852:
1.32 schwarze 853: while (NULL != (e = r->first_eqn)) {
854: r->first_eqn = e->next;
855: eqn_free(e);
856: }
857: r->first_eqn = r->last_eqn = r->eqn = NULL;
858:
1.1 schwarze 859: while (r->last)
860: roffnode_pop(r);
1.27 schwarze 861:
1.96 schwarze 862: free (r->rstack);
863: r->rstack = NULL;
864: r->rstacksz = 0;
865: r->rstackpos = -1;
866:
867: roff_freereg(r->regtab);
868: r->regtab = NULL;
869:
1.42 schwarze 870: roff_freestr(r->strtab);
871: roff_freestr(r->xmbtab);
872: r->strtab = r->xmbtab = NULL;
873:
874: if (r->xtab)
875: for (i = 0; i < 128; i++)
876: free(r->xtab[i].p);
877: free(r->xtab);
878: r->xtab = NULL;
1.1 schwarze 879: }
880:
881: void
882: roff_reset(struct roff *r)
883: {
884:
885: roff_free1(r);
1.99 schwarze 886: r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.48 schwarze 887: r->control = 0;
1.1 schwarze 888: }
889:
890: void
891: roff_free(struct roff *r)
892: {
893:
894: roff_free1(r);
895: free(r);
896: }
897:
898: struct roff *
1.109 schwarze 899: roff_alloc(struct mparse *parse, const struct mchars *mchars, int options)
1.1 schwarze 900: {
901: struct roff *r;
902:
1.11 schwarze 903: r = mandoc_calloc(1, sizeof(struct roff));
1.35 schwarze 904: r->parse = parse;
1.109 schwarze 905: r->mchars = mchars;
1.72 schwarze 906: r->options = options;
1.99 schwarze 907: r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.2 schwarze 908: r->rstackpos = -1;
1.80 schwarze 909:
1.42 schwarze 910: roffhash_init();
1.37 schwarze 911:
1.1 schwarze 912: return(r);
1.137 schwarze 913: }
914:
1.138 schwarze 915: /* --- syntax tree state data management ---------------------------------- */
916:
1.137 schwarze 917: static void
918: roff_man_free1(struct roff_man *man)
919: {
920:
1.138 schwarze 921: if (man->first != NULL)
922: roff_node_delete(man, man->first);
1.137 schwarze 923: free(man->meta.msec);
924: free(man->meta.vol);
925: free(man->meta.os);
926: free(man->meta.arch);
927: free(man->meta.title);
928: free(man->meta.name);
929: free(man->meta.date);
930: }
931:
932: static void
933: roff_man_alloc1(struct roff_man *man)
934: {
935:
936: memset(&man->meta, 0, sizeof(man->meta));
937: man->first = mandoc_calloc(1, sizeof(*man->first));
938: man->first->type = ROFFT_ROOT;
939: man->last = man->first;
940: man->last_es = NULL;
941: man->flags = 0;
942: man->macroset = MACROSET_NONE;
943: man->lastsec = man->lastnamed = SEC_NONE;
944: man->next = ROFF_NEXT_CHILD;
945: }
946:
947: void
948: roff_man_reset(struct roff_man *man)
949: {
950:
951: roff_man_free1(man);
952: roff_man_alloc1(man);
953: }
954:
955: void
956: roff_man_free(struct roff_man *man)
957: {
958:
959: roff_man_free1(man);
960: free(man);
961: }
962:
963: struct roff_man *
964: roff_man_alloc(struct roff *roff, struct mparse *parse,
965: const char *defos, int quick)
966: {
967: struct roff_man *man;
968:
969: man = mandoc_calloc(1, sizeof(*man));
970: man->parse = parse;
971: man->roff = roff;
972: man->defos = defos;
973: man->quick = quick;
974: roff_man_alloc1(man);
975: return(man);
1.1 schwarze 976: }
977:
1.138 schwarze 978: /* --- syntax tree handling ----------------------------------------------- */
979:
980: struct roff_node *
981: roff_node_alloc(struct roff_man *man, int line, int pos,
982: enum roff_type type, int tok)
983: {
984: struct roff_node *n;
985:
986: n = mandoc_calloc(1, sizeof(*n));
987: n->line = line;
988: n->pos = pos;
989: n->tok = tok;
990: n->type = type;
991: n->sec = man->lastsec;
992:
993: if (man->flags & MDOC_SYNOPSIS)
994: n->flags |= MDOC_SYNPRETTY;
995: else
996: n->flags &= ~MDOC_SYNPRETTY;
997: if (man->flags & MDOC_NEWLINE)
998: n->flags |= MDOC_LINE;
999: man->flags &= ~MDOC_NEWLINE;
1000:
1001: return(n);
1002: }
1003:
1004: void
1005: roff_node_append(struct roff_man *man, struct roff_node *n)
1006: {
1007:
1008: switch (man->next) {
1009: case ROFF_NEXT_SIBLING:
1010: man->last->next = n;
1011: n->prev = man->last;
1012: n->parent = man->last->parent;
1013: break;
1014: case ROFF_NEXT_CHILD:
1015: man->last->child = n;
1016: n->parent = man->last;
1017: break;
1018: default:
1019: abort();
1020: /* NOTREACHED */
1021: }
1022: n->parent->nchild++;
1.142 ! schwarze 1023: n->parent->last = n;
1.138 schwarze 1024:
1025: /*
1026: * Copy over the normalised-data pointer of our parent. Not
1027: * everybody has one, but copying a null pointer is fine.
1028: */
1029:
1030: switch (n->type) {
1031: case ROFFT_BODY:
1032: if (n->end != ENDBODY_NOT)
1033: break;
1034: /* FALLTHROUGH */
1035: case ROFFT_TAIL:
1036: /* FALLTHROUGH */
1037: case ROFFT_HEAD:
1038: n->norm = n->parent->norm;
1039: break;
1040: default:
1041: break;
1042: }
1043:
1044: if (man->macroset == MACROSET_MDOC)
1045: mdoc_valid_pre(man, n);
1046:
1047: switch (n->type) {
1048: case ROFFT_HEAD:
1049: assert(n->parent->type == ROFFT_BLOCK);
1050: n->parent->head = n;
1051: break;
1052: case ROFFT_BODY:
1053: if (n->end)
1054: break;
1055: assert(n->parent->type == ROFFT_BLOCK);
1056: n->parent->body = n;
1057: break;
1058: case ROFFT_TAIL:
1059: assert(n->parent->type == ROFFT_BLOCK);
1060: n->parent->tail = n;
1061: break;
1062: default:
1063: break;
1064: }
1065: man->last = n;
1066: }
1067:
1.139 schwarze 1068: void
1069: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
1070: {
1071: struct roff_node *n;
1072:
1073: n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
1074: n->string = roff_strdup(man->roff, word);
1075: roff_node_append(man, n);
1076: if (man->macroset == MACROSET_MDOC)
1077: mdoc_valid_post(man);
1078: else
1079: man_valid_post(man);
1080: man->next = ROFF_NEXT_SIBLING;
1081: }
1082:
1083: void
1084: roff_word_append(struct roff_man *man, const char *word)
1085: {
1086: struct roff_node *n;
1087: char *addstr, *newstr;
1088:
1089: n = man->last;
1090: addstr = roff_strdup(man->roff, word);
1091: mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
1092: free(addstr);
1093: free(n->string);
1094: n->string = newstr;
1095: man->next = ROFF_NEXT_SIBLING;
1.140 schwarze 1096: }
1097:
1098: void
1099: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
1100: {
1101: struct roff_node *n;
1102:
1103: n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
1104: roff_node_append(man, n);
1105: man->next = ROFF_NEXT_CHILD;
1106: }
1107:
1108: struct roff_node *
1109: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
1110: {
1111: struct roff_node *n;
1112:
1113: n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
1114: roff_node_append(man, n);
1115: man->next = ROFF_NEXT_CHILD;
1116: return(n);
1.139 schwarze 1117: }
1118:
1.138 schwarze 1119: struct roff_node *
1120: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
1121: {
1122: struct roff_node *n;
1123:
1124: n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
1125: roff_node_append(man, n);
1126: man->next = ROFF_NEXT_CHILD;
1127: return(n);
1128: }
1129:
1130: struct roff_node *
1131: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
1132: {
1133: struct roff_node *n;
1134:
1135: n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
1136: roff_node_append(man, n);
1137: man->next = ROFF_NEXT_CHILD;
1138: return(n);
1.139 schwarze 1139: }
1140:
1141: void
1142: roff_addeqn(struct roff_man *man, const struct eqn *eqn)
1143: {
1144: struct roff_node *n;
1145:
1146: n = roff_node_alloc(man, eqn->ln, eqn->pos, ROFFT_EQN, TOKEN_NONE);
1147: n->eqn = eqn;
1148: if (eqn->ln > man->last->line)
1149: n->flags |= MDOC_LINE;
1150: roff_node_append(man, n);
1151: man->next = ROFF_NEXT_SIBLING;
1152: }
1153:
1154: void
1155: roff_addtbl(struct roff_man *man, const struct tbl_span *tbl)
1156: {
1157: struct roff_node *n;
1158:
1159: if (man->macroset == MACROSET_MAN)
1160: man_breakscope(man, TOKEN_NONE);
1161: n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
1162: n->span = tbl;
1163: roff_node_append(man, n);
1164: if (man->macroset == MACROSET_MDOC)
1165: mdoc_valid_post(man);
1166: else
1167: man_valid_post(man);
1168: man->next = ROFF_NEXT_SIBLING;
1.138 schwarze 1169: }
1170:
1171: void
1172: roff_node_unlink(struct roff_man *man, struct roff_node *n)
1173: {
1174:
1175: /* Adjust siblings. */
1176:
1177: if (n->prev)
1178: n->prev->next = n->next;
1179: if (n->next)
1180: n->next->prev = n->prev;
1181:
1182: /* Adjust parent. */
1183:
1184: if (n->parent != NULL) {
1185: n->parent->nchild--;
1186: if (n->parent->child == n)
1187: n->parent->child = n->next;
1188: if (n->parent->last == n)
1189: n->parent->last = n->prev;
1190: }
1191:
1192: /* Adjust parse point. */
1193:
1194: if (man == NULL)
1195: return;
1196: if (man->last == n) {
1197: if (n->prev == NULL) {
1198: man->last = n->parent;
1199: man->next = ROFF_NEXT_CHILD;
1200: } else {
1201: man->last = n->prev;
1202: man->next = ROFF_NEXT_SIBLING;
1203: }
1204: }
1205: if (man->first == n)
1206: man->first = NULL;
1207: }
1208:
1209: void
1210: roff_node_free(struct roff_node *n)
1211: {
1212:
1213: if (n->args != NULL)
1214: mdoc_argv_free(n->args);
1215: if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
1216: free(n->norm);
1217: free(n->string);
1218: free(n);
1219: }
1220:
1221: void
1222: roff_node_delete(struct roff_man *man, struct roff_node *n)
1223: {
1224:
1225: while (n->child != NULL)
1226: roff_node_delete(man, n->child);
1227: assert(n->nchild == 0);
1228: roff_node_unlink(man, n);
1229: roff_node_free(n);
1.141 schwarze 1230: }
1231:
1232: void
1233: deroff(char **dest, const struct roff_node *n)
1234: {
1235: char *cp;
1236: size_t sz;
1237:
1238: if (n->type != ROFFT_TEXT) {
1239: for (n = n->child; n != NULL; n = n->next)
1240: deroff(dest, n);
1241: return;
1242: }
1243:
1244: /* Skip leading whitespace and escape sequences. */
1245:
1246: cp = n->string;
1247: while (*cp != '\0') {
1248: if ('\\' == *cp) {
1249: cp++;
1250: mandoc_escape((const char **)&cp, NULL, NULL);
1251: } else if (isspace((unsigned char)*cp))
1252: cp++;
1253: else
1254: break;
1255: }
1256:
1257: /* Skip trailing whitespace. */
1258:
1259: for (sz = strlen(cp); sz; sz--)
1260: if ( ! isspace((unsigned char)cp[sz-1]))
1261: break;
1262:
1263: /* Skip empty strings. */
1264:
1265: if (sz == 0)
1266: return;
1267:
1268: if (*dest == NULL) {
1269: *dest = mandoc_strndup(cp, sz);
1270: return;
1271: }
1272:
1273: mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
1274: free(*dest);
1275: *dest = cp;
1.138 schwarze 1276: }
1277:
1278: /* --- main functions of the roff parser ---------------------------------- */
1279:
1.8 schwarze 1280: /*
1.79 schwarze 1281: * In the current line, expand escape sequences that tend to get
1282: * used in numerical expressions and conditional requests.
1283: * Also check the syntax of the remaining escape sequences.
1.8 schwarze 1284: */
1.45 schwarze 1285: static enum rofferr
1.110 schwarze 1286: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.8 schwarze 1287: {
1.81 schwarze 1288: char ubuf[24]; /* buffer to print the number */
1.78 schwarze 1289: const char *start; /* start of the string to process */
1.82 schwarze 1290: char *stesc; /* start of an escape sequence ('\\') */
1.23 schwarze 1291: const char *stnam; /* start of the name, after "[(*" */
1292: const char *cp; /* end of the name, e.g. before ']' */
1293: const char *res; /* the string to be substituted */
1.110 schwarze 1294: char *nbuf; /* new buffer to copy buf->buf to */
1.53 schwarze 1295: size_t maxl; /* expected length of the escape name */
1296: size_t naml; /* actual length of the escape name */
1.109 schwarze 1297: enum mandoc_esc esc; /* type of the escape sequence */
1298: int inaml; /* length returned from mandoc_escape() */
1.53 schwarze 1299: int expand_count; /* to avoid infinite loops */
1.79 schwarze 1300: int npos; /* position in numeric expression */
1.91 schwarze 1301: int arg_complete; /* argument not interrupted by eol */
1.79 schwarze 1302: char term; /* character terminating the escape */
1.8 schwarze 1303:
1.43 schwarze 1304: expand_count = 0;
1.110 schwarze 1305: start = buf->buf + pos;
1.78 schwarze 1306: stesc = strchr(start, '\0') - 1;
1307: while (stesc-- > start) {
1.43 schwarze 1308:
1.78 schwarze 1309: /* Search backwards for the next backslash. */
1310:
1.110 schwarze 1311: if (*stesc != '\\')
1.78 schwarze 1312: continue;
1313:
1314: /* If it is escaped, skip it. */
1315:
1316: for (cp = stesc - 1; cp >= start; cp--)
1.110 schwarze 1317: if (*cp != '\\')
1.78 schwarze 1318: break;
1319:
1.110 schwarze 1320: if ((stesc - cp) % 2 == 0) {
1.82 schwarze 1321: stesc = (char *)cp;
1.78 schwarze 1322: continue;
1323: }
1.23 schwarze 1324:
1.79 schwarze 1325: /* Decide whether to expand or to check only. */
1.23 schwarze 1326:
1.79 schwarze 1327: term = '\0';
1.78 schwarze 1328: cp = stesc + 1;
1.53 schwarze 1329: switch (*cp) {
1.80 schwarze 1330: case '*':
1.53 schwarze 1331: res = NULL;
1332: break;
1.80 schwarze 1333: case 'B':
1.79 schwarze 1334: /* FALLTHROUGH */
1.80 schwarze 1335: case 'w':
1.79 schwarze 1336: term = cp[1];
1337: /* FALLTHROUGH */
1.80 schwarze 1338: case 'n':
1.53 schwarze 1339: res = ubuf;
1340: break;
1341: default:
1.109 schwarze 1342: esc = mandoc_escape(&cp, &stnam, &inaml);
1343: if (esc == ESCAPE_ERROR ||
1344: (esc == ESCAPE_SPECIAL &&
1345: mchars_spec2cp(r->mchars, stnam, inaml) < 0))
1.92 schwarze 1346: mandoc_vmsg(MANDOCERR_ESC_BAD,
1.110 schwarze 1347: r->parse, ln, (int)(stesc - buf->buf),
1.92 schwarze 1348: "%.*s", (int)(cp - stesc), stesc);
1.78 schwarze 1349: continue;
1.42 schwarze 1350: }
1351:
1.78 schwarze 1352: if (EXPAND_LIMIT < ++expand_count) {
1353: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.110 schwarze 1354: ln, (int)(stesc - buf->buf), NULL);
1.78 schwarze 1355: return(ROFF_IGN);
1356: }
1.23 schwarze 1357:
1358: /*
1359: * The third character decides the length
1.53 schwarze 1360: * of the name of the string or register.
1.23 schwarze 1361: * Save a pointer to the name.
1362: */
1363:
1.110 schwarze 1364: if (term == '\0') {
1.79 schwarze 1365: switch (*++cp) {
1.80 schwarze 1366: case '\0':
1.79 schwarze 1367: maxl = 0;
1368: break;
1.80 schwarze 1369: case '(':
1.79 schwarze 1370: cp++;
1371: maxl = 2;
1372: break;
1.80 schwarze 1373: case '[':
1.79 schwarze 1374: cp++;
1375: term = ']';
1376: maxl = 0;
1377: break;
1378: default:
1379: maxl = 1;
1380: break;
1381: }
1382: } else {
1383: cp += 2;
1.8 schwarze 1384: maxl = 0;
1385: }
1.23 schwarze 1386: stnam = cp;
1.8 schwarze 1387:
1.23 schwarze 1388: /* Advance to the end of the name. */
1.8 schwarze 1389:
1.125 schwarze 1390: naml = 0;
1.91 schwarze 1391: arg_complete = 1;
1.125 schwarze 1392: while (maxl == 0 || naml < maxl) {
1.110 schwarze 1393: if (*cp == '\0') {
1.92 schwarze 1394: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.110 schwarze 1395: ln, (int)(stesc - buf->buf), stesc);
1.91 schwarze 1396: arg_complete = 0;
1.79 schwarze 1397: break;
1.42 schwarze 1398: }
1.110 schwarze 1399: if (maxl == 0 && *cp == term) {
1.79 schwarze 1400: cp++;
1.125 schwarze 1401: break;
1402: }
1403: if (*cp++ != '\\' || stesc[1] != 'w') {
1404: naml++;
1405: continue;
1406: }
1407: switch (mandoc_escape(&cp, NULL, NULL)) {
1408: case ESCAPE_SPECIAL:
1409: /* FALLTHROUGH */
1410: case ESCAPE_UNICODE:
1411: /* FALLTHROUGH */
1412: case ESCAPE_NUMBERED:
1413: /* FALLTHROUGH */
1414: case ESCAPE_OVERSTRIKE:
1415: naml++;
1416: break;
1417: default:
1.8 schwarze 1418: break;
1.79 schwarze 1419: }
1.8 schwarze 1420: }
1421:
1.23 schwarze 1422: /*
1423: * Retrieve the replacement string; if it is
1424: * undefined, resume searching for escapes.
1425: */
1426:
1.79 schwarze 1427: switch (stesc[1]) {
1.80 schwarze 1428: case '*':
1.91 schwarze 1429: if (arg_complete)
1430: res = roff_getstrn(r, stnam, naml);
1.79 schwarze 1431: break;
1.80 schwarze 1432: case 'B':
1.79 schwarze 1433: npos = 0;
1.91 schwarze 1434: ubuf[0] = arg_complete &&
1.133 schwarze 1435: roff_evalnum(r, ln, stnam, &npos,
1436: NULL, ROFFNUM_SCALE) &&
1.91 schwarze 1437: stnam + npos + 1 == cp ? '1' : '0';
1.79 schwarze 1438: ubuf[1] = '\0';
1439: break;
1.80 schwarze 1440: case 'n':
1.91 schwarze 1441: if (arg_complete)
1442: (void)snprintf(ubuf, sizeof(ubuf), "%d",
1443: roff_getregn(r, stnam, naml));
1444: else
1445: ubuf[0] = '\0';
1.79 schwarze 1446: break;
1.80 schwarze 1447: case 'w':
1.91 schwarze 1448: /* use even incomplete args */
1.81 schwarze 1449: (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.79 schwarze 1450: 24 * (int)naml);
1451: break;
1452: }
1.8 schwarze 1453:
1.110 schwarze 1454: if (res == NULL) {
1.92 schwarze 1455: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.110 schwarze 1456: r->parse, ln, (int)(stesc - buf->buf),
1.92 schwarze 1457: "%.*s", (int)naml, stnam);
1.37 schwarze 1458: res = "";
1.118 schwarze 1459: } else if (buf->sz + strlen(res) > SHRT_MAX) {
1460: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1461: ln, (int)(stesc - buf->buf), NULL);
1462: return(ROFF_IGN);
1.8 schwarze 1463: }
1464:
1.23 schwarze 1465: /* Replace the escape sequence by the string. */
1466:
1.82 schwarze 1467: *stesc = '\0';
1.110 schwarze 1468: buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
1469: buf->buf, res, cp) + 1;
1.8 schwarze 1470:
1.78 schwarze 1471: /* Prepare for the next replacement. */
1.8 schwarze 1472:
1.78 schwarze 1473: start = nbuf + pos;
1.110 schwarze 1474: stesc = nbuf + (stesc - buf->buf) + strlen(res);
1475: free(buf->buf);
1476: buf->buf = nbuf;
1.42 schwarze 1477: }
1.45 schwarze 1478: return(ROFF_CONT);
1.42 schwarze 1479: }
1480:
1481: /*
1.51 schwarze 1482: * Process text streams:
1483: * Convert all breakable hyphens into ASCII_HYPH.
1484: * Decrement and spring input line trap.
1.42 schwarze 1485: */
1486: static enum rofferr
1.110 schwarze 1487: roff_parsetext(struct buf *buf, int pos, int *offs)
1.42 schwarze 1488: {
1489: size_t sz;
1490: const char *start;
1.51 schwarze 1491: char *p;
1492: int isz;
1.42 schwarze 1493: enum mandoc_esc esc;
1494:
1.110 schwarze 1495: start = p = buf->buf + pos;
1.42 schwarze 1496:
1.110 schwarze 1497: while (*p != '\0') {
1.42 schwarze 1498: sz = strcspn(p, "-\\");
1499: p += sz;
1500:
1.110 schwarze 1501: if (*p == '\0')
1.42 schwarze 1502: break;
1503:
1.110 schwarze 1504: if (*p == '\\') {
1.42 schwarze 1505: /* Skip over escapes. */
1506: p++;
1.62 schwarze 1507: esc = mandoc_escape((const char **)&p, NULL, NULL);
1.110 schwarze 1508: if (esc == ESCAPE_ERROR)
1.42 schwarze 1509: break;
1.136 schwarze 1510: while (*p == '-')
1511: p++;
1.42 schwarze 1512: continue;
1513: } else if (p == start) {
1514: p++;
1515: continue;
1516: }
1517:
1.44 schwarze 1518: if (isalpha((unsigned char)p[-1]) &&
1519: isalpha((unsigned char)p[1]))
1.42 schwarze 1520: *p = ASCII_HYPH;
1521: p++;
1.8 schwarze 1522: }
1523:
1.51 schwarze 1524: /* Spring the input line trap. */
1.110 schwarze 1525: if (roffit_lines == 1) {
1526: isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
1527: free(buf->buf);
1528: buf->buf = p;
1529: buf->sz = isz + 1;
1.51 schwarze 1530: *offs = 0;
1531: free(roffit_macro);
1532: roffit_lines = 0;
1533: return(ROFF_REPARSE);
1.110 schwarze 1534: } else if (roffit_lines > 1)
1.51 schwarze 1535: --roffit_lines;
1.42 schwarze 1536: return(ROFF_CONT);
1.8 schwarze 1537: }
1538:
1.1 schwarze 1539: enum rofferr
1.110 schwarze 1540: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.1 schwarze 1541: {
1542: enum rofft t;
1.27 schwarze 1543: enum rofferr e;
1.110 schwarze 1544: int pos; /* parse point */
1.115 schwarze 1545: int spos; /* saved parse point for messages */
1.110 schwarze 1546: int ppos; /* original offset in buf->buf */
1547: int ctl; /* macro line (boolean) */
1548:
1549: ppos = pos = *offs;
1.1 schwarze 1550:
1.102 schwarze 1551: /* Handle in-line equation delimiters. */
1552:
1.108 schwarze 1553: if (r->tbl == NULL &&
1554: r->last_eqn != NULL && r->last_eqn->delim &&
1.102 schwarze 1555: (r->eqn == NULL || r->eqn_inline)) {
1.110 schwarze 1556: e = roff_eqndelim(r, buf, pos);
1.102 schwarze 1557: if (e == ROFF_REPARSE)
1558: return(e);
1559: assert(e == ROFF_CONT);
1560: }
1561:
1562: /* Expand some escape sequences. */
1.8 schwarze 1563:
1.110 schwarze 1564: e = roff_res(r, buf, ln, pos);
1565: if (e == ROFF_IGN)
1.45 schwarze 1566: return(e);
1.110 schwarze 1567: assert(e == ROFF_CONT);
1.8 schwarze 1568:
1.110 schwarze 1569: ctl = roff_getcontrol(r, buf->buf, &pos);
1.35 schwarze 1570:
1.8 schwarze 1571: /*
1.2 schwarze 1572: * First, if a scope is open and we're not a macro, pass the
1.124 schwarze 1573: * text through the macro's filter.
1574: * Equations process all content themselves.
1575: * Tables process almost all content themselves, but we want
1576: * to warn about macros before passing it there.
1.2 schwarze 1577: */
1578:
1.124 schwarze 1579: if (r->last != NULL && ! ctl) {
1.2 schwarze 1580: t = r->last->tok;
1581: assert(roffs[t].text);
1.110 schwarze 1582: e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
1583: assert(e == ROFF_IGN || e == ROFF_CONT);
1584: if (e != ROFF_CONT)
1.32 schwarze 1585: return(e);
1.54 schwarze 1586: }
1.124 schwarze 1587: if (r->eqn != NULL)
1.110 schwarze 1588: return(eqn_read(&r->eqn, ln, buf->buf, ppos, offs));
1.124 schwarze 1589: if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
1.131 schwarze 1590: return(tbl_read(r->tbl, ln, buf->buf, ppos));
1.124 schwarze 1591: if ( ! ctl)
1.110 schwarze 1592: return(roff_parsetext(buf, pos, offs));
1.100 schwarze 1593:
1594: /* Skip empty request lines. */
1595:
1.110 schwarze 1596: if (buf->buf[pos] == '"') {
1.100 schwarze 1597: mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
1598: ln, pos, NULL);
1599: return(ROFF_IGN);
1.110 schwarze 1600: } else if (buf->buf[pos] == '\0')
1.100 schwarze 1601: return(ROFF_IGN);
1.2 schwarze 1602:
1603: /*
1604: * If a scope is open, go to the child handler for that macro,
1605: * as it may want to preprocess before doing anything with it.
1.32 schwarze 1606: * Don't do so if an equation is open.
1.2 schwarze 1607: */
1608:
1609: if (r->last) {
1.1 schwarze 1610: t = r->last->tok;
1611: assert(roffs[t].sub);
1.110 schwarze 1612: return((*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs));
1.2 schwarze 1613: }
1614:
1.115 schwarze 1615: /* No scope is open. This is a new request or macro. */
1616:
1617: spos = pos;
1618: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1619:
1620: /* Tables ignore most macros. */
1621:
1622: if (r->tbl != NULL && (t == ROFF_MAX || t == ROFF_TS)) {
1623: mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
1624: ln, pos, buf->buf + spos);
1.129 schwarze 1625: if (t == ROFF_TS)
1626: return(ROFF_IGN);
1627: while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
1628: pos++;
1629: while (buf->buf[pos] != '\0' && buf->buf[pos] == ' ')
1630: pos++;
1631: return(tbl_read(r->tbl, ln, buf->buf, pos));
1.115 schwarze 1632: }
1633:
1.2 schwarze 1634: /*
1.115 schwarze 1635: * This is neither a roff request nor a user-defined macro.
1636: * Let the standard macro set parsers handle it.
1.2 schwarze 1637: */
1638:
1.115 schwarze 1639: if (t == ROFF_MAX)
1.1 schwarze 1640: return(ROFF_CONT);
1.115 schwarze 1641:
1642: /* Execute a roff request or a user defined macro. */
1.1 schwarze 1643:
1.2 schwarze 1644: assert(roffs[t].proc);
1.110 schwarze 1645: return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.2 schwarze 1646: }
1647:
1.27 schwarze 1648: void
1.2 schwarze 1649: roff_endparse(struct roff *r)
1650: {
1.1 schwarze 1651:
1.27 schwarze 1652: if (r->last)
1.94 schwarze 1653: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1654: r->last->line, r->last->col,
1655: roffs[r->last->tok].name);
1.27 schwarze 1656:
1.32 schwarze 1657: if (r->eqn) {
1.94 schwarze 1658: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1659: r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.41 schwarze 1660: eqn_end(&r->eqn);
1.32 schwarze 1661: }
1662:
1.27 schwarze 1663: if (r->tbl) {
1.94 schwarze 1664: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1665: r->tbl->line, r->tbl->pos, "TS");
1.41 schwarze 1666: tbl_end(&r->tbl);
1.27 schwarze 1667: }
1.1 schwarze 1668: }
1669:
1670: /*
1671: * Parse a roff node's type from the input buffer. This must be in the
1672: * form of ".foo xxx" in the usual way.
1673: */
1674: static enum rofft
1.87 schwarze 1675: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.1 schwarze 1676: {
1.87 schwarze 1677: char *cp;
1.16 schwarze 1678: const char *mac;
1679: size_t maclen;
1.1 schwarze 1680: enum rofft t;
1681:
1.87 schwarze 1682: cp = buf + *pos;
1683:
1684: if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.1 schwarze 1685: return(ROFF_MAX);
1686:
1.87 schwarze 1687: mac = cp;
1688: maclen = roff_getname(r, &cp, ln, ppos);
1.1 schwarze 1689:
1.16 schwarze 1690: t = (r->current_string = roff_getstrn(r, mac, maclen))
1.42 schwarze 1691: ? ROFF_USERDEF : roffhash_find(mac, maclen);
1.1 schwarze 1692:
1.87 schwarze 1693: if (ROFF_MAX != t)
1694: *pos = cp - buf;
1.1 schwarze 1695:
1696: return(t);
1697: }
1698:
1.138 schwarze 1699: /* --- handling of request blocks ----------------------------------------- */
1700:
1.1 schwarze 1701: static enum rofferr
1.2 schwarze 1702: roff_cblock(ROFF_ARGS)
1.1 schwarze 1703: {
1704:
1.2 schwarze 1705: /*
1706: * A block-close `..' should only be invoked as a child of an
1707: * ignore macro, otherwise raise a warning and just ignore it.
1708: */
1709:
1.110 schwarze 1710: if (r->last == NULL) {
1.94 schwarze 1711: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1712: ln, ppos, "..");
1.2 schwarze 1713: return(ROFF_IGN);
1714: }
1.1 schwarze 1715:
1.2 schwarze 1716: switch (r->last->tok) {
1.80 schwarze 1717: case ROFF_am:
1.93 schwarze 1718: /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.2 schwarze 1719: /* FALLTHROUGH */
1.80 schwarze 1720: case ROFF_ami:
1.2 schwarze 1721: /* FALLTHROUGH */
1.80 schwarze 1722: case ROFF_de:
1.23 schwarze 1723: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.2 schwarze 1724: /* FALLTHROUGH */
1.80 schwarze 1725: case ROFF_dei:
1.2 schwarze 1726: /* FALLTHROUGH */
1.80 schwarze 1727: case ROFF_ig:
1.2 schwarze 1728: break;
1729: default:
1.94 schwarze 1730: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1731: ln, ppos, "..");
1.1 schwarze 1732: return(ROFF_IGN);
1.2 schwarze 1733: }
1734:
1.110 schwarze 1735: if (buf->buf[pos] != '\0')
1.90 schwarze 1736: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.110 schwarze 1737: ".. %s", buf->buf + pos);
1.2 schwarze 1738:
1739: roffnode_pop(r);
1740: roffnode_cleanscope(r);
1741: return(ROFF_IGN);
1742:
1743: }
1.1 schwarze 1744:
1.2 schwarze 1745: static void
1746: roffnode_cleanscope(struct roff *r)
1747: {
1.1 schwarze 1748:
1.2 schwarze 1749: while (r->last) {
1.46 schwarze 1750: if (--r->last->endspan != 0)
1.2 schwarze 1751: break;
1752: roffnode_pop(r);
1753: }
1754: }
1.1 schwarze 1755:
1.68 schwarze 1756: static void
1757: roff_ccond(struct roff *r, int ln, int ppos)
1.2 schwarze 1758: {
1.1 schwarze 1759:
1.2 schwarze 1760: if (NULL == r->last) {
1.94 schwarze 1761: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1762: ln, ppos, "\\}");
1.68 schwarze 1763: return;
1.2 schwarze 1764: }
1.1 schwarze 1765:
1.2 schwarze 1766: switch (r->last->tok) {
1.80 schwarze 1767: case ROFF_el:
1.2 schwarze 1768: /* FALLTHROUGH */
1.80 schwarze 1769: case ROFF_ie:
1.2 schwarze 1770: /* FALLTHROUGH */
1.80 schwarze 1771: case ROFF_if:
1.2 schwarze 1772: break;
1773: default:
1.94 schwarze 1774: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1775: ln, ppos, "\\}");
1.68 schwarze 1776: return;
1.2 schwarze 1777: }
1.1 schwarze 1778:
1.2 schwarze 1779: if (r->last->endspan > -1) {
1.94 schwarze 1780: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1781: ln, ppos, "\\}");
1.68 schwarze 1782: return;
1.2 schwarze 1783: }
1784:
1785: roffnode_pop(r);
1786: roffnode_cleanscope(r);
1.68 schwarze 1787: return;
1.1 schwarze 1788: }
1789:
1790: static enum rofferr
1.2 schwarze 1791: roff_block(ROFF_ARGS)
1.1 schwarze 1792: {
1.93 schwarze 1793: const char *name;
1794: char *iname, *cp;
1.86 schwarze 1795: size_t namesz;
1.16 schwarze 1796:
1.93 schwarze 1797: /* Ignore groff compatibility mode for now. */
1.2 schwarze 1798:
1.110 schwarze 1799: if (tok == ROFF_de1)
1.93 schwarze 1800: tok = ROFF_de;
1.123 schwarze 1801: else if (tok == ROFF_dei1)
1802: tok = ROFF_dei;
1.110 schwarze 1803: else if (tok == ROFF_am1)
1.93 schwarze 1804: tok = ROFF_am;
1.123 schwarze 1805: else if (tok == ROFF_ami1)
1806: tok = ROFF_ami;
1.93 schwarze 1807:
1808: /* Parse the macro name argument. */
1809:
1.110 schwarze 1810: cp = buf->buf + pos;
1811: if (tok == ROFF_ig) {
1.93 schwarze 1812: iname = NULL;
1813: namesz = 0;
1814: } else {
1815: iname = cp;
1816: namesz = roff_getname(r, &cp, ln, ppos);
1817: iname[namesz] = '\0';
1818: }
1.22 schwarze 1819:
1.93 schwarze 1820: /* Resolve the macro name argument if it is indirect. */
1.22 schwarze 1821:
1.110 schwarze 1822: if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1823: if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.93 schwarze 1824: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.110 schwarze 1825: r->parse, ln, (int)(iname - buf->buf),
1.93 schwarze 1826: "%.*s", (int)namesz, iname);
1827: namesz = 0;
1828: } else
1829: namesz = strlen(name);
1830: } else
1831: name = iname;
1.22 schwarze 1832:
1.110 schwarze 1833: if (namesz == 0 && tok != ROFF_ig) {
1.93 schwarze 1834: mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
1835: ln, ppos, roffs[tok].name);
1836: return(ROFF_IGN);
1837: }
1.2 schwarze 1838:
1.16 schwarze 1839: roffnode_push(r, tok, name, ln, ppos);
1840:
1841: /*
1842: * At the beginning of a `de' macro, clear the existing string
1843: * with the same name, if there is one. New content will be
1.66 schwarze 1844: * appended from roff_block_text() in multiline mode.
1.16 schwarze 1845: */
1.22 schwarze 1846:
1.110 schwarze 1847: if (tok == ROFF_de || tok == ROFF_dei)
1.86 schwarze 1848: roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.2 schwarze 1849:
1.110 schwarze 1850: if (*cp == '\0')
1.2 schwarze 1851: return(ROFF_IGN);
1.1 schwarze 1852:
1.93 schwarze 1853: /* Get the custom end marker. */
1.22 schwarze 1854:
1.93 schwarze 1855: iname = cp;
1.86 schwarze 1856: namesz = roff_getname(r, &cp, ln, ppos);
1.93 schwarze 1857:
1858: /* Resolve the end marker if it is indirect. */
1859:
1.110 schwarze 1860: if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1861: if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.93 schwarze 1862: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.110 schwarze 1863: r->parse, ln, (int)(iname - buf->buf),
1.93 schwarze 1864: "%.*s", (int)namesz, iname);
1865: namesz = 0;
1866: } else
1867: namesz = strlen(name);
1868: } else
1869: name = iname;
1870:
1.86 schwarze 1871: if (namesz)
1872: r->last->end = mandoc_strndup(name, namesz);
1.2 schwarze 1873:
1.110 schwarze 1874: if (*cp != '\0')
1.90 schwarze 1875: mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
1876: ln, pos, ".%s ... %s", roffs[tok].name, cp);
1.1 schwarze 1877:
1878: return(ROFF_IGN);
1879: }
1880:
1881: static enum rofferr
1.2 schwarze 1882: roff_block_sub(ROFF_ARGS)
1.1 schwarze 1883: {
1.2 schwarze 1884: enum rofft t;
1885: int i, j;
1886:
1887: /*
1888: * First check whether a custom macro exists at this level. If
1889: * it does, then check against it. This is some of groff's
1890: * stranger behaviours. If we encountered a custom end-scope
1891: * tag and that tag also happens to be a "real" macro, then we
1892: * need to try interpreting it again as a real macro. If it's
1893: * not, then return ignore. Else continue.
1894: */
1895:
1896: if (r->last->end) {
1.35 schwarze 1897: for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.110 schwarze 1898: if (buf->buf[i] != r->last->end[j])
1.2 schwarze 1899: break;
1.1 schwarze 1900:
1.110 schwarze 1901: if (r->last->end[j] == '\0' &&
1902: (buf->buf[i] == '\0' ||
1903: buf->buf[i] == ' ' ||
1904: buf->buf[i] == '\t')) {
1.2 schwarze 1905: roffnode_pop(r);
1906: roffnode_cleanscope(r);
1.1 schwarze 1907:
1.110 schwarze 1908: while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.35 schwarze 1909: i++;
1910:
1911: pos = i;
1.110 schwarze 1912: if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1913: ROFF_MAX)
1.2 schwarze 1914: return(ROFF_RERUN);
1915: return(ROFF_IGN);
1916: }
1.1 schwarze 1917: }
1918:
1.2 schwarze 1919: /*
1920: * If we have no custom end-query or lookup failed, then try
1921: * pulling it out of the hashtable.
1922: */
1.1 schwarze 1923:
1.110 schwarze 1924: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.1 schwarze 1925:
1.110 schwarze 1926: if (t != ROFF_cblock) {
1927: if (tok != ROFF_ig)
1928: roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.1 schwarze 1929: return(ROFF_IGN);
1.16 schwarze 1930: }
1.1 schwarze 1931:
1.2 schwarze 1932: assert(roffs[t].proc);
1.110 schwarze 1933: return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.2 schwarze 1934: }
1935:
1936: static enum rofferr
1937: roff_block_text(ROFF_ARGS)
1938: {
1939:
1.110 schwarze 1940: if (tok != ROFF_ig)
1941: roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.16 schwarze 1942:
1.2 schwarze 1943: return(ROFF_IGN);
1944: }
1945:
1946: static enum rofferr
1947: roff_cond_sub(ROFF_ARGS)
1948: {
1949: enum rofft t;
1.37 schwarze 1950: char *ep;
1.71 schwarze 1951: int rr;
1.2 schwarze 1952:
1953: rr = r->last->rule;
1.37 schwarze 1954: roffnode_cleanscope(r);
1.110 schwarze 1955: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.2 schwarze 1956:
1.37 schwarze 1957: /*
1.50 schwarze 1958: * Fully handle known macros when they are structurally
1959: * required or when the conditional evaluated to true.
1.5 schwarze 1960: */
1961:
1.110 schwarze 1962: if ((t != ROFF_MAX) &&
1963: (rr || roffs[t].flags & ROFFMAC_STRUCT)) {
1.50 schwarze 1964: assert(roffs[t].proc);
1.110 schwarze 1965: return((*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs));
1.50 schwarze 1966: }
1.39 schwarze 1967:
1.69 schwarze 1968: /*
1969: * If `\}' occurs on a macro line without a preceding macro,
1970: * drop the line completely.
1971: */
1972:
1.110 schwarze 1973: ep = buf->buf + pos;
1974: if (ep[0] == '\\' && ep[1] == '}')
1.71 schwarze 1975: rr = 0;
1.69 schwarze 1976:
1.50 schwarze 1977: /* Always check for the closing delimiter `\}'. */
1.39 schwarze 1978:
1.110 schwarze 1979: while ((ep = strchr(ep, '\\')) != NULL) {
1980: if (*(++ep) == '}') {
1.70 schwarze 1981: *ep = '&';
1.110 schwarze 1982: roff_ccond(r, ln, ep - buf->buf - 1);
1.70 schwarze 1983: }
1.119 schwarze 1984: if (*ep != '\0')
1985: ++ep;
1.50 schwarze 1986: }
1.71 schwarze 1987: return(rr ? ROFF_CONT : ROFF_IGN);
1.2 schwarze 1988: }
1989:
1990: static enum rofferr
1991: roff_cond_text(ROFF_ARGS)
1992: {
1.37 schwarze 1993: char *ep;
1.71 schwarze 1994: int rr;
1.2 schwarze 1995:
1996: rr = r->last->rule;
1.37 schwarze 1997: roffnode_cleanscope(r);
1.1 schwarze 1998:
1.110 schwarze 1999: ep = buf->buf + pos;
2000: while ((ep = strchr(ep, '\\')) != NULL) {
2001: if (*(++ep) == '}') {
1.70 schwarze 2002: *ep = '&';
1.110 schwarze 2003: roff_ccond(r, ln, ep - buf->buf - 1);
1.70 schwarze 2004: }
1.119 schwarze 2005: if (*ep != '\0')
2006: ++ep;
1.2 schwarze 2007: }
1.71 schwarze 2008: return(rr ? ROFF_CONT : ROFF_IGN);
1.2 schwarze 2009: }
2010:
1.138 schwarze 2011: /* --- handling of numeric and conditional expressions -------------------- */
2012:
1.77 schwarze 2013: /*
2014: * Parse a single signed integer number. Stop at the first non-digit.
2015: * If there is at least one digit, return success and advance the
2016: * parse point, else return failure and let the parse point unchanged.
2017: * Ignore overflows, treat them just like the C language.
2018: */
1.56 schwarze 2019: static int
1.133 schwarze 2020: roff_getnum(const char *v, int *pos, int *res, int flags)
1.56 schwarze 2021: {
1.133 schwarze 2022: int myres, scaled, n, p;
1.79 schwarze 2023:
2024: if (NULL == res)
2025: res = &myres;
1.56 schwarze 2026:
2027: p = *pos;
2028: n = v[p] == '-';
1.133 schwarze 2029: if (n || v[p] == '+')
1.56 schwarze 2030: p++;
2031:
1.133 schwarze 2032: if (flags & ROFFNUM_WHITE)
2033: while (isspace((unsigned char)v[p]))
2034: p++;
2035:
1.56 schwarze 2036: for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.77 schwarze 2037: *res = 10 * *res + v[p] - '0';
1.56 schwarze 2038: if (p == *pos + n)
2039: return 0;
2040:
2041: if (n)
2042: *res = -*res;
2043:
1.126 schwarze 2044: /* Each number may be followed by one optional scaling unit. */
2045:
2046: switch (v[p]) {
2047: case 'f':
1.133 schwarze 2048: scaled = *res * 65536;
1.126 schwarze 2049: break;
2050: case 'i':
1.133 schwarze 2051: scaled = *res * 240;
1.126 schwarze 2052: break;
2053: case 'c':
1.133 schwarze 2054: scaled = *res * 240 / 2.54;
1.126 schwarze 2055: break;
2056: case 'v':
2057: /* FALLTROUGH */
2058: case 'P':
1.133 schwarze 2059: scaled = *res * 40;
1.126 schwarze 2060: break;
2061: case 'm':
2062: /* FALLTROUGH */
2063: case 'n':
1.133 schwarze 2064: scaled = *res * 24;
1.126 schwarze 2065: break;
2066: case 'p':
1.133 schwarze 2067: scaled = *res * 10 / 3;
1.126 schwarze 2068: break;
2069: case 'u':
1.133 schwarze 2070: scaled = *res;
1.126 schwarze 2071: break;
2072: case 'M':
1.133 schwarze 2073: scaled = *res * 6 / 25;
1.126 schwarze 2074: break;
2075: default:
1.133 schwarze 2076: scaled = *res;
1.126 schwarze 2077: p--;
2078: break;
2079: }
1.133 schwarze 2080: if (flags & ROFFNUM_SCALE)
2081: *res = scaled;
1.126 schwarze 2082:
2083: *pos = p + 1;
2084: return(1);
1.56 schwarze 2085: }
2086:
1.71 schwarze 2087: /*
2088: * Evaluate a string comparison condition.
2089: * The first character is the delimiter.
2090: * Succeed if the string up to its second occurrence
2091: * matches the string up to its third occurence.
2092: * Advance the cursor after the third occurrence
2093: * or lacking that, to the end of the line.
2094: */
2095: static int
2096: roff_evalstrcond(const char *v, int *pos)
2097: {
2098: const char *s1, *s2, *s3;
2099: int match;
2100:
2101: match = 0;
2102: s1 = v + *pos; /* initial delimiter */
2103: s2 = s1 + 1; /* for scanning the first string */
2104: s3 = strchr(s2, *s1); /* for scanning the second string */
2105:
2106: if (NULL == s3) /* found no middle delimiter */
2107: goto out;
2108:
2109: while ('\0' != *++s3) {
2110: if (*s2 != *s3) { /* mismatch */
2111: s3 = strchr(s3, *s1);
2112: break;
2113: }
2114: if (*s3 == *s1) { /* found the final delimiter */
2115: match = 1;
2116: break;
2117: }
2118: s2++;
2119: }
2120:
2121: out:
2122: if (NULL == s3)
2123: s3 = strchr(s2, '\0');
1.114 schwarze 2124: else if (*s3 != '\0')
1.71 schwarze 2125: s3++;
2126: *pos = s3 - v;
2127: return(match);
2128: }
2129:
1.77 schwarze 2130: /*
2131: * Evaluate an optionally negated single character, numerical,
2132: * or string condition.
2133: */
1.71 schwarze 2134: static int
1.106 schwarze 2135: roff_evalcond(struct roff *r, int ln, const char *v, int *pos)
1.5 schwarze 2136: {
1.113 schwarze 2137: int number, savepos, wanttrue;
1.5 schwarze 2138:
1.71 schwarze 2139: if ('!' == v[*pos]) {
2140: wanttrue = 0;
2141: (*pos)++;
2142: } else
2143: wanttrue = 1;
2144:
1.5 schwarze 2145: switch (v[*pos]) {
1.112 schwarze 2146: case '\0':
2147: return(0);
1.80 schwarze 2148: case 'n':
1.71 schwarze 2149: /* FALLTHROUGH */
1.80 schwarze 2150: case 'o':
1.5 schwarze 2151: (*pos)++;
1.71 schwarze 2152: return(wanttrue);
1.80 schwarze 2153: case 'c':
1.71 schwarze 2154: /* FALLTHROUGH */
1.80 schwarze 2155: case 'd':
1.71 schwarze 2156: /* FALLTHROUGH */
1.80 schwarze 2157: case 'e':
1.5 schwarze 2158: /* FALLTHROUGH */
1.80 schwarze 2159: case 'r':
1.5 schwarze 2160: /* FALLTHROUGH */
1.80 schwarze 2161: case 't':
1.111 schwarze 2162: /* FALLTHROUGH */
2163: case 'v':
1.5 schwarze 2164: (*pos)++;
1.71 schwarze 2165: return(!wanttrue);
1.5 schwarze 2166: default:
2167: break;
2168: }
2169:
1.113 schwarze 2170: savepos = *pos;
1.133 schwarze 2171: if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.77 schwarze 2172: return((number > 0) == wanttrue);
1.113 schwarze 2173: else if (*pos == savepos)
2174: return(roff_evalstrcond(v, pos) == wanttrue);
1.77 schwarze 2175: else
1.113 schwarze 2176: return (0);
1.5 schwarze 2177: }
2178:
1.2 schwarze 2179: static enum rofferr
1.21 schwarze 2180: roff_line_ignore(ROFF_ARGS)
1.6 schwarze 2181: {
1.30 schwarze 2182:
1.21 schwarze 2183: return(ROFF_IGN);
2184: }
2185:
2186: static enum rofferr
1.123 schwarze 2187: roff_insec(ROFF_ARGS)
2188: {
2189:
2190: mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
2191: ln, ppos, roffs[tok].name);
2192: return(ROFF_IGN);
2193: }
2194:
2195: static enum rofferr
2196: roff_unsupp(ROFF_ARGS)
2197: {
2198:
2199: mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
2200: ln, ppos, roffs[tok].name);
2201: return(ROFF_IGN);
2202: }
2203:
2204: static enum rofferr
1.2 schwarze 2205: roff_cond(ROFF_ARGS)
2206: {
1.46 schwarze 2207:
2208: roffnode_push(r, tok, NULL, ln, ppos);
1.2 schwarze 2209:
1.80 schwarze 2210: /*
1.35 schwarze 2211: * An `.el' has no conditional body: it will consume the value
2212: * of the current rstack entry set in prior `ie' calls or
1.80 schwarze 2213: * defaults to DENY.
1.35 schwarze 2214: *
2215: * If we're not an `el', however, then evaluate the conditional.
2216: */
1.1 schwarze 2217:
1.110 schwarze 2218: r->last->rule = tok == ROFF_el ?
1.80 schwarze 2219: (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.110 schwarze 2220: roff_evalcond(r, ln, buf->buf, &pos);
1.2 schwarze 2221:
1.35 schwarze 2222: /*
2223: * An if-else will put the NEGATION of the current evaluated
2224: * conditional into the stack of rules.
2225: */
2226:
1.110 schwarze 2227: if (tok == ROFF_ie) {
1.96 schwarze 2228: if (r->rstackpos + 1 == r->rstacksz) {
2229: r->rstacksz += 16;
2230: r->rstack = mandoc_reallocarray(r->rstack,
2231: r->rstacksz, sizeof(int));
1.35 schwarze 2232: }
1.71 schwarze 2233: r->rstack[++r->rstackpos] = !r->last->rule;
1.2 schwarze 2234: }
1.5 schwarze 2235:
2236: /* If the parent has false as its rule, then so do we. */
2237:
1.71 schwarze 2238: if (r->last->parent && !r->last->parent->rule)
2239: r->last->rule = 0;
1.5 schwarze 2240:
2241: /*
1.46 schwarze 2242: * Determine scope.
2243: * If there is nothing on the line after the conditional,
2244: * not even whitespace, use next-line scope.
1.5 schwarze 2245: */
1.2 schwarze 2246:
1.110 schwarze 2247: if (buf->buf[pos] == '\0') {
1.46 schwarze 2248: r->last->endspan = 2;
2249: goto out;
2250: }
2251:
1.110 schwarze 2252: while (buf->buf[pos] == ' ')
1.46 schwarze 2253: pos++;
2254:
2255: /* An opening brace requests multiline scope. */
1.2 schwarze 2256:
1.110 schwarze 2257: if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.2 schwarze 2258: r->last->endspan = -1;
2259: pos += 2;
1.46 schwarze 2260: goto out;
1.80 schwarze 2261: }
1.2 schwarze 2262:
2263: /*
1.46 schwarze 2264: * Anything else following the conditional causes
2265: * single-line scope. Warn if the scope contains
2266: * nothing but trailing whitespace.
1.2 schwarze 2267: */
2268:
1.110 schwarze 2269: if (buf->buf[pos] == '\0')
1.89 schwarze 2270: mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
2271: ln, ppos, roffs[tok].name);
1.2 schwarze 2272:
1.46 schwarze 2273: r->last->endspan = 1;
1.1 schwarze 2274:
1.46 schwarze 2275: out:
1.2 schwarze 2276: *offs = pos;
2277: return(ROFF_RERUN);
1.1 schwarze 2278: }
2279:
1.2 schwarze 2280: static enum rofferr
1.7 schwarze 2281: roff_ds(ROFF_ARGS)
2282: {
1.85 schwarze 2283: char *string;
2284: const char *name;
2285: size_t namesz;
1.10 schwarze 2286:
1.123 schwarze 2287: /* Ignore groff compatibility mode for now. */
2288:
2289: if (tok == ROFF_ds1)
2290: tok = ROFF_ds;
2291: else if (tok == ROFF_as1)
2292: tok = ROFF_as;
2293:
1.10 schwarze 2294: /*
1.85 schwarze 2295: * The first word is the name of the string.
2296: * If it is empty or terminated by an escape sequence,
2297: * abort the `ds' request without defining anything.
1.10 schwarze 2298: */
1.7 schwarze 2299:
1.110 schwarze 2300: name = string = buf->buf + pos;
2301: if (*name == '\0')
1.7 schwarze 2302: return(ROFF_IGN);
2303:
1.85 schwarze 2304: namesz = roff_getname(r, &string, ln, pos);
1.110 schwarze 2305: if (name[namesz] == '\\')
1.85 schwarze 2306: return(ROFF_IGN);
2307:
2308: /* Read past the initial double-quote, if any. */
1.110 schwarze 2309: if (*string == '"')
1.7 schwarze 2310: string++;
2311:
1.10 schwarze 2312: /* The rest is the value. */
1.85 schwarze 2313: roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
2314: ROFF_as == tok);
1.7 schwarze 2315: return(ROFF_IGN);
2316: }
2317:
1.77 schwarze 2318: /*
2319: * Parse a single operator, one or two characters long.
2320: * If the operator is recognized, return success and advance the
2321: * parse point, else return failure and let the parse point unchanged.
2322: */
2323: static int
2324: roff_getop(const char *v, int *pos, char *res)
2325: {
2326:
2327: *res = v[*pos];
2328:
2329: switch (*res) {
1.80 schwarze 2330: case '+':
1.77 schwarze 2331: /* FALLTHROUGH */
1.80 schwarze 2332: case '-':
1.77 schwarze 2333: /* FALLTHROUGH */
1.80 schwarze 2334: case '*':
1.77 schwarze 2335: /* FALLTHROUGH */
1.80 schwarze 2336: case '/':
1.77 schwarze 2337: /* FALLTHROUGH */
1.80 schwarze 2338: case '%':
1.77 schwarze 2339: /* FALLTHROUGH */
1.80 schwarze 2340: case '&':
1.77 schwarze 2341: /* FALLTHROUGH */
1.80 schwarze 2342: case ':':
1.77 schwarze 2343: break;
2344: case '<':
2345: switch (v[*pos + 1]) {
1.80 schwarze 2346: case '=':
1.77 schwarze 2347: *res = 'l';
2348: (*pos)++;
2349: break;
1.80 schwarze 2350: case '>':
1.77 schwarze 2351: *res = '!';
2352: (*pos)++;
2353: break;
1.80 schwarze 2354: case '?':
1.77 schwarze 2355: *res = 'i';
2356: (*pos)++;
2357: break;
2358: default:
2359: break;
2360: }
2361: break;
2362: case '>':
2363: switch (v[*pos + 1]) {
1.80 schwarze 2364: case '=':
1.77 schwarze 2365: *res = 'g';
2366: (*pos)++;
2367: break;
1.80 schwarze 2368: case '?':
1.77 schwarze 2369: *res = 'a';
2370: (*pos)++;
2371: break;
2372: default:
2373: break;
2374: }
2375: break;
2376: case '=':
2377: if ('=' == v[*pos + 1])
2378: (*pos)++;
2379: break;
2380: default:
2381: return(0);
2382: }
2383: (*pos)++;
2384:
2385: return(*res);
2386: }
2387:
2388: /*
2389: * Evaluate either a parenthesized numeric expression
2390: * or a single signed integer number.
2391: */
2392: static int
1.106 schwarze 2393: roff_evalpar(struct roff *r, int ln,
1.133 schwarze 2394: const char *v, int *pos, int *res, int flags)
1.77 schwarze 2395: {
2396:
2397: if ('(' != v[*pos])
1.133 schwarze 2398: return(roff_getnum(v, pos, res, flags));
1.77 schwarze 2399:
2400: (*pos)++;
1.133 schwarze 2401: if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.77 schwarze 2402: return(0);
2403:
1.79 schwarze 2404: /*
2405: * Omission of the closing parenthesis
2406: * is an error in validation mode,
2407: * but ignored in evaluation mode.
2408: */
2409:
1.77 schwarze 2410: if (')' == v[*pos])
2411: (*pos)++;
1.79 schwarze 2412: else if (NULL == res)
2413: return(0);
1.77 schwarze 2414:
2415: return(1);
2416: }
2417:
2418: /*
2419: * Evaluate a complete numeric expression.
2420: * Proceed left to right, there is no concept of precedence.
2421: */
2422: static int
1.106 schwarze 2423: roff_evalnum(struct roff *r, int ln, const char *v,
1.133 schwarze 2424: int *pos, int *res, int flags)
1.77 schwarze 2425: {
2426: int mypos, operand2;
2427: char operator;
2428:
2429: if (NULL == pos) {
2430: mypos = 0;
2431: pos = &mypos;
2432: }
2433:
1.133 schwarze 2434: if (flags & ROFFNUM_WHITE)
1.77 schwarze 2435: while (isspace((unsigned char)v[*pos]))
2436: (*pos)++;
2437:
1.133 schwarze 2438: if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.77 schwarze 2439: return(0);
2440:
2441: while (1) {
1.133 schwarze 2442: if (flags & ROFFNUM_WHITE)
1.77 schwarze 2443: while (isspace((unsigned char)v[*pos]))
2444: (*pos)++;
2445:
2446: if ( ! roff_getop(v, pos, &operator))
2447: break;
2448:
1.133 schwarze 2449: if (flags & ROFFNUM_WHITE)
1.77 schwarze 2450: while (isspace((unsigned char)v[*pos]))
2451: (*pos)++;
2452:
1.133 schwarze 2453: if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.77 schwarze 2454: return(0);
2455:
1.133 schwarze 2456: if (flags & ROFFNUM_WHITE)
1.77 schwarze 2457: while (isspace((unsigned char)v[*pos]))
2458: (*pos)++;
1.79 schwarze 2459:
2460: if (NULL == res)
2461: continue;
1.77 schwarze 2462:
2463: switch (operator) {
1.80 schwarze 2464: case '+':
1.77 schwarze 2465: *res += operand2;
2466: break;
1.80 schwarze 2467: case '-':
1.77 schwarze 2468: *res -= operand2;
2469: break;
1.80 schwarze 2470: case '*':
1.77 schwarze 2471: *res *= operand2;
2472: break;
1.80 schwarze 2473: case '/':
1.116 schwarze 2474: if (operand2 == 0) {
1.106 schwarze 2475: mandoc_msg(MANDOCERR_DIVZERO,
2476: r->parse, ln, *pos, v);
2477: *res = 0;
2478: break;
2479: }
1.77 schwarze 2480: *res /= operand2;
2481: break;
1.80 schwarze 2482: case '%':
1.116 schwarze 2483: if (operand2 == 0) {
2484: mandoc_msg(MANDOCERR_DIVZERO,
2485: r->parse, ln, *pos, v);
2486: *res = 0;
2487: break;
2488: }
1.77 schwarze 2489: *res %= operand2;
2490: break;
1.80 schwarze 2491: case '<':
1.77 schwarze 2492: *res = *res < operand2;
2493: break;
1.80 schwarze 2494: case '>':
1.77 schwarze 2495: *res = *res > operand2;
2496: break;
1.80 schwarze 2497: case 'l':
1.77 schwarze 2498: *res = *res <= operand2;
2499: break;
1.80 schwarze 2500: case 'g':
1.77 schwarze 2501: *res = *res >= operand2;
2502: break;
1.80 schwarze 2503: case '=':
1.77 schwarze 2504: *res = *res == operand2;
2505: break;
1.80 schwarze 2506: case '!':
1.77 schwarze 2507: *res = *res != operand2;
2508: break;
1.80 schwarze 2509: case '&':
1.77 schwarze 2510: *res = *res && operand2;
2511: break;
1.80 schwarze 2512: case ':':
1.77 schwarze 2513: *res = *res || operand2;
2514: break;
1.80 schwarze 2515: case 'i':
1.77 schwarze 2516: if (operand2 < *res)
2517: *res = operand2;
2518: break;
1.80 schwarze 2519: case 'a':
1.77 schwarze 2520: if (operand2 > *res)
2521: *res = operand2;
2522: break;
2523: default:
2524: abort();
2525: }
2526: }
2527: return(1);
2528: }
2529:
1.138 schwarze 2530: /* --- register management ------------------------------------------------ */
2531:
1.52 schwarze 2532: void
1.60 schwarze 2533: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.41 schwarze 2534: {
1.52 schwarze 2535: struct roffreg *reg;
2536:
2537: /* Search for an existing register with the same name. */
2538: reg = r->regtab;
2539:
2540: while (reg && strcmp(name, reg->key.p))
2541: reg = reg->next;
1.41 schwarze 2542:
1.52 schwarze 2543: if (NULL == reg) {
2544: /* Create a new register. */
2545: reg = mandoc_malloc(sizeof(struct roffreg));
2546: reg->key.p = mandoc_strdup(name);
2547: reg->key.sz = strlen(name);
1.60 schwarze 2548: reg->val = 0;
1.52 schwarze 2549: reg->next = r->regtab;
2550: r->regtab = reg;
2551: }
2552:
1.60 schwarze 2553: if ('+' == sign)
2554: reg->val += val;
2555: else if ('-' == sign)
2556: reg->val -= val;
2557: else
2558: reg->val = val;
1.41 schwarze 2559: }
2560:
1.65 schwarze 2561: /*
2562: * Handle some predefined read-only number registers.
2563: * For now, return -1 if the requested register is not predefined;
2564: * in case a predefined read-only register having the value -1
2565: * were to turn up, another special value would have to be chosen.
2566: */
2567: static int
2568: roff_getregro(const char *name)
2569: {
2570:
2571: switch (*name) {
1.80 schwarze 2572: case 'A': /* ASCII approximation mode is always off. */
1.65 schwarze 2573: return(0);
1.80 schwarze 2574: case 'g': /* Groff compatibility mode is always on. */
1.65 schwarze 2575: return(1);
1.80 schwarze 2576: case 'H': /* Fixed horizontal resolution. */
1.65 schwarze 2577: return (24);
1.80 schwarze 2578: case 'j': /* Always adjust left margin only. */
1.65 schwarze 2579: return(0);
1.80 schwarze 2580: case 'T': /* Some output device is always defined. */
1.65 schwarze 2581: return(1);
1.80 schwarze 2582: case 'V': /* Fixed vertical resolution. */
1.65 schwarze 2583: return (40);
2584: default:
2585: return (-1);
2586: }
2587: }
2588:
1.53 schwarze 2589: int
1.52 schwarze 2590: roff_getreg(const struct roff *r, const char *name)
1.41 schwarze 2591: {
1.52 schwarze 2592: struct roffreg *reg;
1.65 schwarze 2593: int val;
2594:
2595: if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
2596: val = roff_getregro(name + 1);
2597: if (-1 != val)
2598: return (val);
2599: }
1.52 schwarze 2600:
2601: for (reg = r->regtab; reg; reg = reg->next)
2602: if (0 == strcmp(name, reg->key.p))
1.53 schwarze 2603: return(reg->val);
2604:
2605: return(0);
2606: }
2607:
2608: static int
2609: roff_getregn(const struct roff *r, const char *name, size_t len)
2610: {
2611: struct roffreg *reg;
1.65 schwarze 2612: int val;
2613:
2614: if ('.' == name[0] && 2 == len) {
2615: val = roff_getregro(name + 1);
2616: if (-1 != val)
2617: return (val);
2618: }
1.53 schwarze 2619:
2620: for (reg = r->regtab; reg; reg = reg->next)
2621: if (len == reg->key.sz &&
2622: 0 == strncmp(name, reg->key.p, len))
2623: return(reg->val);
1.41 schwarze 2624:
1.52 schwarze 2625: return(0);
1.41 schwarze 2626: }
2627:
1.52 schwarze 2628: static void
2629: roff_freereg(struct roffreg *reg)
1.41 schwarze 2630: {
1.52 schwarze 2631: struct roffreg *old_reg;
1.41 schwarze 2632:
1.52 schwarze 2633: while (NULL != reg) {
2634: free(reg->key.p);
2635: old_reg = reg;
2636: reg = reg->next;
2637: free(old_reg);
2638: }
1.41 schwarze 2639: }
1.7 schwarze 2640:
2641: static enum rofferr
1.6 schwarze 2642: roff_nr(ROFF_ARGS)
1.1 schwarze 2643: {
1.85 schwarze 2644: char *key, *val;
2645: size_t keysz;
1.37 schwarze 2646: int iv;
1.60 schwarze 2647: char sign;
1.6 schwarze 2648:
1.110 schwarze 2649: key = val = buf->buf + pos;
2650: if (*key == '\0')
1.85 schwarze 2651: return(ROFF_IGN);
2652:
2653: keysz = roff_getname(r, &val, ln, pos);
1.110 schwarze 2654: if (key[keysz] == '\\')
1.85 schwarze 2655: return(ROFF_IGN);
2656: key[keysz] = '\0';
1.6 schwarze 2657:
1.60 schwarze 2658: sign = *val;
1.110 schwarze 2659: if (sign == '+' || sign == '-')
1.60 schwarze 2660: val++;
2661:
1.133 schwarze 2662: if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
1.77 schwarze 2663: roff_setreg(r, key, iv, sign);
1.1 schwarze 2664:
1.76 schwarze 2665: return(ROFF_IGN);
2666: }
2667:
2668: static enum rofferr
2669: roff_rr(ROFF_ARGS)
2670: {
2671: struct roffreg *reg, **prev;
1.85 schwarze 2672: char *name, *cp;
2673: size_t namesz;
1.76 schwarze 2674:
1.110 schwarze 2675: name = cp = buf->buf + pos;
2676: if (*name == '\0')
1.85 schwarze 2677: return(ROFF_IGN);
2678: namesz = roff_getname(r, &cp, ln, pos);
2679: name[namesz] = '\0';
1.76 schwarze 2680:
2681: prev = &r->regtab;
2682: while (1) {
2683: reg = *prev;
1.110 schwarze 2684: if (reg == NULL || !strcmp(name, reg->key.p))
1.76 schwarze 2685: break;
2686: prev = ®->next;
2687: }
1.110 schwarze 2688: if (reg != NULL) {
1.76 schwarze 2689: *prev = reg->next;
2690: free(reg->key.p);
2691: free(reg);
2692: }
1.29 schwarze 2693: return(ROFF_IGN);
2694: }
2695:
1.138 schwarze 2696: /* --- handler functions for roff requests -------------------------------- */
2697:
1.29 schwarze 2698: static enum rofferr
2699: roff_rm(ROFF_ARGS)
2700: {
2701: const char *name;
2702: char *cp;
1.85 schwarze 2703: size_t namesz;
1.29 schwarze 2704:
1.110 schwarze 2705: cp = buf->buf + pos;
2706: while (*cp != '\0') {
1.85 schwarze 2707: name = cp;
1.110 schwarze 2708: namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.85 schwarze 2709: roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.110 schwarze 2710: if (name[namesz] == '\\')
1.85 schwarze 2711: break;
1.29 schwarze 2712: }
1.51 schwarze 2713: return(ROFF_IGN);
2714: }
2715:
2716: static enum rofferr
2717: roff_it(ROFF_ARGS)
2718: {
2719: int iv;
2720:
2721: /* Parse the number of lines. */
1.133 schwarze 2722:
2723: if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.95 schwarze 2724: mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.110 schwarze 2725: ln, ppos, buf->buf + 1);
1.51 schwarze 2726: return(ROFF_IGN);
2727: }
2728:
1.134 schwarze 2729: while (isspace((unsigned char)buf->buf[pos]))
2730: pos++;
2731:
2732: /*
2733: * Arm the input line trap.
2734: * Special-casing "an-trap" is an ugly workaround to cope
2735: * with DocBook stupidly fiddling with man(7) internals.
2736: */
1.133 schwarze 2737:
1.51 schwarze 2738: roffit_lines = iv;
1.134 schwarze 2739: roffit_macro = mandoc_strdup(iv != 1 ||
2740: strcmp(buf->buf + pos, "an-trap") ?
2741: buf->buf + pos : "br");
1.2 schwarze 2742: return(ROFF_IGN);
1.47 schwarze 2743: }
2744:
2745: static enum rofferr
2746: roff_Dd(ROFF_ARGS)
2747: {
2748: const char *const *cp;
2749:
1.99 schwarze 2750: if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.47 schwarze 2751: for (cp = __mdoc_reserved; *cp; cp++)
2752: roff_setstr(r, *cp, NULL, 0);
2753:
1.99 schwarze 2754: if (r->format == 0)
2755: r->format = MPARSE_MDOC;
2756:
1.47 schwarze 2757: return(ROFF_CONT);
2758: }
2759:
2760: static enum rofferr
2761: roff_TH(ROFF_ARGS)
2762: {
2763: const char *const *cp;
2764:
1.99 schwarze 2765: if ((r->options & MPARSE_QUICK) == 0)
1.47 schwarze 2766: for (cp = __man_reserved; *cp; cp++)
2767: roff_setstr(r, *cp, NULL, 0);
2768:
1.99 schwarze 2769: if (r->format == 0)
2770: r->format = MPARSE_MAN;
2771:
1.47 schwarze 2772: return(ROFF_CONT);
1.14 schwarze 2773: }
2774:
2775: static enum rofferr
1.27 schwarze 2776: roff_TE(ROFF_ARGS)
2777: {
2778:
2779: if (NULL == r->tbl)
1.94 schwarze 2780: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
2781: ln, ppos, "TE");
1.130 schwarze 2782: else if ( ! tbl_end(&r->tbl)) {
2783: free(buf->buf);
2784: buf->buf = mandoc_strdup(".sp");
2785: buf->sz = 4;
2786: return(ROFF_REPARSE);
2787: }
1.27 schwarze 2788: return(ROFF_IGN);
2789: }
2790:
2791: static enum rofferr
2792: roff_T_(ROFF_ARGS)
2793: {
2794:
2795: if (NULL == r->tbl)
1.94 schwarze 2796: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
2797: ln, ppos, "T&");
1.27 schwarze 2798: else
2799: tbl_restart(ppos, ln, r->tbl);
2800:
2801: return(ROFF_IGN);
2802: }
2803:
1.102 schwarze 2804: /*
2805: * Handle in-line equation delimiters.
2806: */
2807: static enum rofferr
1.110 schwarze 2808: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.41 schwarze 2809: {
1.105 schwarze 2810: char *cp1, *cp2;
2811: const char *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.41 schwarze 2812:
1.102 schwarze 2813: /*
2814: * Outside equations, look for an opening delimiter.
2815: * If we are inside an equation, we already know it is
2816: * in-line, or this function wouldn't have been called;
2817: * so look for a closing delimiter.
2818: */
2819:
1.110 schwarze 2820: cp1 = buf->buf + pos;
1.102 schwarze 2821: cp2 = strchr(cp1, r->eqn == NULL ?
2822: r->last_eqn->odelim : r->last_eqn->cdelim);
2823: if (cp2 == NULL)
2824: return(ROFF_CONT);
2825:
1.105 schwarze 2826: *cp2++ = '\0';
2827: bef_pr = bef_nl = aft_nl = aft_pr = "";
2828:
2829: /* Handle preceding text, protecting whitespace. */
2830:
1.110 schwarze 2831: if (*buf->buf != '\0') {
1.105 schwarze 2832: if (r->eqn == NULL)
2833: bef_pr = "\\&";
2834: bef_nl = "\n";
2835: }
2836:
2837: /*
2838: * Prepare replacing the delimiter with an equation macro
2839: * and drop leading white space from the equation.
2840: */
1.102 schwarze 2841:
1.105 schwarze 2842: if (r->eqn == NULL) {
2843: while (*cp2 == ' ')
2844: cp2++;
2845: mac = ".EQ";
2846: } else
2847: mac = ".EN";
2848:
2849: /* Handle following text, protecting whitespace. */
2850:
2851: if (*cp2 != '\0') {
2852: aft_nl = "\n";
2853: if (r->eqn != NULL)
2854: aft_pr = "\\&";
2855: }
2856:
2857: /* Do the actual replacement. */
2858:
1.110 schwarze 2859: buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.105 schwarze 2860: bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.110 schwarze 2861: free(buf->buf);
2862: buf->buf = cp1;
1.102 schwarze 2863:
2864: /* Toggle the in-line state of the eqn subsystem. */
2865:
2866: r->eqn_inline = r->eqn == NULL;
2867: return(ROFF_REPARSE);
1.41 schwarze 2868: }
2869:
1.107 schwarze 2870: static enum rofferr
2871: roff_EQ(ROFF_ARGS)
1.32 schwarze 2872: {
1.41 schwarze 2873: struct eqn_node *e;
1.32 schwarze 2874:
1.110 schwarze 2875: assert(r->eqn == NULL);
1.107 schwarze 2876: e = eqn_alloc(ppos, ln, r->parse);
1.32 schwarze 2877:
1.102 schwarze 2878: if (r->last_eqn) {
1.32 schwarze 2879: r->last_eqn->next = e;
1.102 schwarze 2880: e->delim = r->last_eqn->delim;
2881: e->odelim = r->last_eqn->odelim;
2882: e->cdelim = r->last_eqn->cdelim;
2883: } else
1.32 schwarze 2884: r->first_eqn = r->last_eqn = e;
2885:
2886: r->eqn = r->last_eqn = e;
1.41 schwarze 2887:
1.110 schwarze 2888: if (buf->buf[pos] != '\0')
1.107 schwarze 2889: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.110 schwarze 2890: ".EQ %s", buf->buf + pos);
1.41 schwarze 2891:
1.32 schwarze 2892: return(ROFF_IGN);
2893: }
2894:
2895: static enum rofferr
2896: roff_EN(ROFF_ARGS)
2897: {
2898:
1.94 schwarze 2899: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.32 schwarze 2900: return(ROFF_IGN);
2901: }
2902:
2903: static enum rofferr
1.27 schwarze 2904: roff_TS(ROFF_ARGS)
2905: {
1.49 schwarze 2906: struct tbl_node *tbl;
1.27 schwarze 2907:
2908: if (r->tbl) {
1.94 schwarze 2909: mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
2910: ln, ppos, "TS breaks TS");
1.41 schwarze 2911: tbl_end(&r->tbl);
1.27 schwarze 2912: }
2913:
1.49 schwarze 2914: tbl = tbl_alloc(ppos, ln, r->parse);
1.27 schwarze 2915:
2916: if (r->last_tbl)
1.49 schwarze 2917: r->last_tbl->next = tbl;
1.27 schwarze 2918: else
1.49 schwarze 2919: r->first_tbl = r->last_tbl = tbl;
1.27 schwarze 2920:
1.49 schwarze 2921: r->tbl = r->last_tbl = tbl;
1.27 schwarze 2922: return(ROFF_IGN);
1.123 schwarze 2923: }
2924:
2925: static enum rofferr
2926: roff_brp(ROFF_ARGS)
2927: {
2928:
2929: buf->buf[pos - 1] = '\0';
2930: return(ROFF_CONT);
1.27 schwarze 2931: }
2932:
2933: static enum rofferr
1.48 schwarze 2934: roff_cc(ROFF_ARGS)
2935: {
2936: const char *p;
2937:
1.110 schwarze 2938: p = buf->buf + pos;
1.48 schwarze 2939:
1.110 schwarze 2940: if (*p == '\0' || (r->control = *p++) == '.')
1.48 schwarze 2941: r->control = 0;
2942:
1.110 schwarze 2943: if (*p != '\0')
1.132 schwarze 2944: mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
2945: ln, p - buf->buf, "cc ... %s", p);
1.48 schwarze 2946:
2947: return(ROFF_IGN);
2948: }
2949:
2950: static enum rofferr
1.42 schwarze 2951: roff_tr(ROFF_ARGS)
2952: {
2953: const char *p, *first, *second;
2954: size_t fsz, ssz;
2955: enum mandoc_esc esc;
2956:
1.110 schwarze 2957: p = buf->buf + pos;
1.42 schwarze 2958:
1.110 schwarze 2959: if (*p == '\0') {
1.132 schwarze 2960: mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.42 schwarze 2961: return(ROFF_IGN);
2962: }
2963:
1.110 schwarze 2964: while (*p != '\0') {
1.42 schwarze 2965: fsz = ssz = 1;
2966:
2967: first = p++;
1.110 schwarze 2968: if (*first == '\\') {
1.42 schwarze 2969: esc = mandoc_escape(&p, NULL, NULL);
1.110 schwarze 2970: if (esc == ESCAPE_ERROR) {
1.92 schwarze 2971: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.110 schwarze 2972: ln, (int)(p - buf->buf), first);
1.42 schwarze 2973: return(ROFF_IGN);
2974: }
2975: fsz = (size_t)(p - first);
2976: }
2977:
2978: second = p++;
1.110 schwarze 2979: if (*second == '\\') {
1.42 schwarze 2980: esc = mandoc_escape(&p, NULL, NULL);
1.110 schwarze 2981: if (esc == ESCAPE_ERROR) {
1.92 schwarze 2982: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.110 schwarze 2983: ln, (int)(p - buf->buf), second);
1.42 schwarze 2984: return(ROFF_IGN);
2985: }
2986: ssz = (size_t)(p - second);
1.110 schwarze 2987: } else if (*second == '\0') {
1.132 schwarze 2988: mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
2989: ln, first - buf->buf, "tr %s", first);
1.42 schwarze 2990: second = " ";
2991: p--;
2992: }
2993:
2994: if (fsz > 1) {
1.80 schwarze 2995: roff_setstrn(&r->xmbtab, first, fsz,
2996: second, ssz, 0);
1.42 schwarze 2997: continue;
2998: }
2999:
1.110 schwarze 3000: if (r->xtab == NULL)
1.80 schwarze 3001: r->xtab = mandoc_calloc(128,
3002: sizeof(struct roffstr));
1.42 schwarze 3003:
3004: free(r->xtab[(int)*first].p);
3005: r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
3006: r->xtab[(int)*first].sz = ssz;
3007: }
3008:
3009: return(ROFF_IGN);
3010: }
3011:
3012: static enum rofferr
1.14 schwarze 3013: roff_so(ROFF_ARGS)
3014: {
1.121 schwarze 3015: char *name, *cp;
1.15 schwarze 3016:
1.110 schwarze 3017: name = buf->buf + pos;
1.97 schwarze 3018: mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.14 schwarze 3019:
1.22 schwarze 3020: /*
3021: * Handle `so'. Be EXTREMELY careful, as we shouldn't be
3022: * opening anything that's not in our cwd or anything beneath
3023: * it. Thus, explicitly disallow traversing up the file-system
3024: * or using absolute paths.
3025: */
3026:
1.110 schwarze 3027: if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.83 schwarze 3028: mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
3029: ".so %s", name);
1.121 schwarze 3030: buf->sz = mandoc_asprintf(&cp,
3031: ".sp\nSee the file %s.\n.sp", name) + 1;
3032: free(buf->buf);
3033: buf->buf = cp;
3034: *offs = 0;
3035: return(ROFF_REPARSE);
1.14 schwarze 3036: }
3037:
3038: *offs = pos;
3039: return(ROFF_SO);
1.7 schwarze 3040: }
3041:
1.138 schwarze 3042: /* --- user defined strings and macros ------------------------------------ */
3043:
1.16 schwarze 3044: static enum rofferr
3045: roff_userdef(ROFF_ARGS)
1.12 schwarze 3046: {
1.135 schwarze 3047: const char *arg[9], *ap;
1.16 schwarze 3048: char *cp, *n1, *n2;
1.25 schwarze 3049: int i;
1.135 schwarze 3050: size_t asz, rsz;
1.12 schwarze 3051:
1.16 schwarze 3052: /*
3053: * Collect pointers to macro argument strings
1.61 schwarze 3054: * and NUL-terminate them.
1.16 schwarze 3055: */
1.135 schwarze 3056:
1.110 schwarze 3057: cp = buf->buf + pos;
1.25 schwarze 3058: for (i = 0; i < 9; i++)
1.110 schwarze 3059: arg[i] = *cp == '\0' ? "" :
1.35 schwarze 3060: mandoc_getarg(r->parse, &cp, ln, &pos);
1.16 schwarze 3061:
3062: /*
3063: * Expand macro arguments.
1.12 schwarze 3064: */
1.135 schwarze 3065:
3066: buf->sz = strlen(r->current_string) + 1;
3067: n1 = cp = mandoc_malloc(buf->sz);
3068: memcpy(n1, r->current_string, buf->sz);
3069: while (*cp != '\0') {
3070:
3071: /* Scan ahead for the next argument invocation. */
3072:
3073: if (*cp++ != '\\')
3074: continue;
3075: if (*cp++ != '$')
3076: continue;
3077: i = *cp - '1';
3078: if (0 > i || 8 < i)
1.16 schwarze 3079: continue;
1.135 schwarze 3080: cp -= 2;
3081:
3082: /*
3083: * Determine the size of the expanded argument,
3084: * taking escaping of quotes into account.
3085: */
3086:
3087: asz = 0;
3088: for (ap = arg[i]; *ap != '\0'; ap++) {
3089: asz++;
3090: if (*ap == '"')
3091: asz += 3;
3092: }
3093: if (asz != 3) {
3094:
3095: /*
3096: * Determine the size of the rest of the
3097: * unexpanded macro, including the NUL.
3098: */
3099:
3100: rsz = buf->sz - (cp - n1) - 3;
3101:
3102: /*
3103: * When shrinking, move before
3104: * releasing the storage.
3105: */
3106:
3107: if (asz < 3)
3108: memmove(cp + asz, cp + 3, rsz);
3109:
3110: /*
3111: * Resize the storage for the macro
3112: * and readjust the parse pointer.
3113: */
3114:
3115: buf->sz += asz - 3;
3116: n2 = mandoc_realloc(n1, buf->sz);
3117: cp = n2 + (cp - n1);
3118: n1 = n2;
3119:
3120: /*
3121: * When growing, make room
3122: * for the expanded argument.
3123: */
3124:
3125: if (asz > 3)
3126: memmove(cp + asz, cp + 3, rsz);
3127: }
3128:
3129: /* Copy the expanded argument, escaping quotes. */
3130:
3131: n2 = cp;
3132: for (ap = arg[i]; *ap != '\0'; ap++) {
3133: if (*ap == '"') {
3134: memcpy(n2, "\\(dq", 4);
3135: n2 += 4;
3136: } else
3137: *n2++ = *ap;
1.16 schwarze 3138: }
1.12 schwarze 3139: }
3140:
1.16 schwarze 3141: /*
3142: * Replace the macro invocation
3143: * by the expanded macro.
3144: */
1.135 schwarze 3145:
1.110 schwarze 3146: free(buf->buf);
3147: buf->buf = n1;
1.120 schwarze 3148: *offs = 0;
1.16 schwarze 3149:
1.110 schwarze 3150: return(buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
1.16 schwarze 3151: ROFF_REPARSE : ROFF_APPEND);
1.12 schwarze 3152: }
1.28 schwarze 3153:
1.85 schwarze 3154: static size_t
1.28 schwarze 3155: roff_getname(struct roff *r, char **cpp, int ln, int pos)
3156: {
3157: char *name, *cp;
1.85 schwarze 3158: size_t namesz;
1.28 schwarze 3159:
3160: name = *cpp;
3161: if ('\0' == *name)
1.85 schwarze 3162: return(0);
1.28 schwarze 3163:
1.85 schwarze 3164: /* Read until end of name and terminate it with NUL. */
3165: for (cp = name; 1; cp++) {
3166: if ('\0' == *cp || ' ' == *cp) {
3167: namesz = cp - name;
3168: break;
3169: }
1.28 schwarze 3170: if ('\\' != *cp)
3171: continue;
1.88 schwarze 3172: namesz = cp - name;
3173: if ('{' == cp[1] || '}' == cp[1])
3174: break;
1.28 schwarze 3175: cp++;
3176: if ('\\' == *cp)
3177: continue;
1.97 schwarze 3178: mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
3179: "%.*s", (int)(cp - name + 1), name);
1.85 schwarze 3180: mandoc_escape((const char **)&cp, NULL, NULL);
3181: break;
1.28 schwarze 3182: }
3183:
3184: /* Read past spaces. */
3185: while (' ' == *cp)
3186: cp++;
3187:
3188: *cpp = cp;
1.85 schwarze 3189: return(namesz);
1.28 schwarze 3190: }
3191:
1.16 schwarze 3192: /*
3193: * Store *string into the user-defined string called *name.
3194: * To clear an existing entry, call with (*r, *name, NULL, 0).
1.66 schwarze 3195: * append == 0: replace mode
3196: * append == 1: single-line append mode
3197: * append == 2: multiline append mode, append '\n' after each call
1.16 schwarze 3198: */
1.8 schwarze 3199: static void
1.16 schwarze 3200: roff_setstr(struct roff *r, const char *name, const char *string,
1.66 schwarze 3201: int append)
1.7 schwarze 3202: {
1.42 schwarze 3203:
3204: roff_setstrn(&r->strtab, name, strlen(name), string,
1.80 schwarze 3205: string ? strlen(string) : 0, append);
1.42 schwarze 3206: }
3207:
3208: static void
3209: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.66 schwarze 3210: const char *string, size_t stringsz, int append)
1.42 schwarze 3211: {
3212: struct roffkv *n;
3213: char *c;
3214: int i;
3215: size_t oldch, newch;
1.7 schwarze 3216:
1.16 schwarze 3217: /* Search for an existing string with the same name. */
1.42 schwarze 3218: n = *r;
3219:
1.84 schwarze 3220: while (n && (namesz != n->key.sz ||
3221: strncmp(n->key.p, name, namesz)))
1.7 schwarze 3222: n = n->next;
1.8 schwarze 3223:
3224: if (NULL == n) {
1.16 schwarze 3225: /* Create a new string table entry. */
1.42 schwarze 3226: n = mandoc_malloc(sizeof(struct roffkv));
3227: n->key.p = mandoc_strndup(name, namesz);
3228: n->key.sz = namesz;
3229: n->val.p = NULL;
3230: n->val.sz = 0;
3231: n->next = *r;
3232: *r = n;
1.66 schwarze 3233: } else if (0 == append) {
1.42 schwarze 3234: free(n->val.p);
3235: n->val.p = NULL;
3236: n->val.sz = 0;
1.16 schwarze 3237: }
3238:
3239: if (NULL == string)
3240: return;
3241:
3242: /*
3243: * One additional byte for the '\n' in multiline mode,
3244: * and one for the terminating '\0'.
3245: */
1.66 schwarze 3246: newch = stringsz + (1 < append ? 2u : 1u);
1.42 schwarze 3247:
3248: if (NULL == n->val.p) {
3249: n->val.p = mandoc_malloc(newch);
3250: *n->val.p = '\0';
1.16 schwarze 3251: oldch = 0;
3252: } else {
1.42 schwarze 3253: oldch = n->val.sz;
3254: n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.16 schwarze 3255: }
3256:
3257: /* Skip existing content in the destination buffer. */
1.42 schwarze 3258: c = n->val.p + (int)oldch;
1.16 schwarze 3259:
3260: /* Append new content to the destination buffer. */
1.42 schwarze 3261: i = 0;
3262: while (i < (int)stringsz) {
1.16 schwarze 3263: /*
3264: * Rudimentary roff copy mode:
3265: * Handle escaped backslashes.
3266: */
1.42 schwarze 3267: if ('\\' == string[i] && '\\' == string[i + 1])
3268: i++;
3269: *c++ = string[i++];
1.16 schwarze 3270: }
1.8 schwarze 3271:
1.16 schwarze 3272: /* Append terminating bytes. */
1.66 schwarze 3273: if (1 < append)
1.16 schwarze 3274: *c++ = '\n';
1.42 schwarze 3275:
1.16 schwarze 3276: *c = '\0';
1.42 schwarze 3277: n->val.sz = (int)(c - n->val.p);
1.7 schwarze 3278: }
3279:
1.8 schwarze 3280: static const char *
3281: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.7 schwarze 3282: {
1.42 schwarze 3283: const struct roffkv *n;
1.64 schwarze 3284: int i;
1.7 schwarze 3285:
1.42 schwarze 3286: for (n = r->strtab; n; n = n->next)
1.80 schwarze 3287: if (0 == strncmp(name, n->key.p, len) &&
3288: '\0' == n->key.p[(int)len])
1.42 schwarze 3289: return(n->val.p);
1.64 schwarze 3290:
3291: for (i = 0; i < PREDEFS_MAX; i++)
3292: if (0 == strncmp(name, predefs[i].name, len) &&
3293: '\0' == predefs[i].name[(int)len])
3294: return(predefs[i].str);
1.8 schwarze 3295:
1.42 schwarze 3296: return(NULL);
1.7 schwarze 3297: }
3298:
1.8 schwarze 3299: static void
1.42 schwarze 3300: roff_freestr(struct roffkv *r)
1.7 schwarze 3301: {
1.42 schwarze 3302: struct roffkv *n, *nn;
1.7 schwarze 3303:
1.42 schwarze 3304: for (n = r; n; n = nn) {
3305: free(n->key.p);
3306: free(n->val.p);
1.7 schwarze 3307: nn = n->next;
3308: free(n);
3309: }
1.27 schwarze 3310: }
1.138 schwarze 3311:
3312: /* --- accessors and utility functions ------------------------------------ */
1.27 schwarze 3313:
3314: const struct tbl_span *
3315: roff_span(const struct roff *r)
3316: {
1.80 schwarze 3317:
1.27 schwarze 3318: return(r->tbl ? tbl_span(r->tbl) : NULL);
1.32 schwarze 3319: }
3320:
3321: const struct eqn *
3322: roff_eqn(const struct roff *r)
3323: {
1.80 schwarze 3324:
1.32 schwarze 3325: return(r->last_eqn ? &r->last_eqn->eqn : NULL);
1.42 schwarze 3326: }
3327:
3328: /*
3329: * Duplicate an input string, making the appropriate character
3330: * conversations (as stipulated by `tr') along the way.
3331: * Returns a heap-allocated string with all the replacements made.
3332: */
3333: char *
3334: roff_strdup(const struct roff *r, const char *p)
3335: {
3336: const struct roffkv *cp;
3337: char *res;
3338: const char *pp;
3339: size_t ssz, sz;
3340: enum mandoc_esc esc;
3341:
3342: if (NULL == r->xmbtab && NULL == r->xtab)
3343: return(mandoc_strdup(p));
3344: else if ('\0' == *p)
3345: return(mandoc_strdup(""));
3346:
3347: /*
3348: * Step through each character looking for term matches
3349: * (remember that a `tr' can be invoked with an escape, which is
3350: * a glyph but the escape is multi-character).
3351: * We only do this if the character hash has been initialised
3352: * and the string is >0 length.
3353: */
3354:
3355: res = NULL;
3356: ssz = 0;
3357:
3358: while ('\0' != *p) {
3359: if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) {
3360: sz = r->xtab[(int)*p].sz;
3361: res = mandoc_realloc(res, ssz + sz + 1);
3362: memcpy(res + ssz, r->xtab[(int)*p].p, sz);
3363: ssz += sz;
3364: p++;
3365: continue;
3366: } else if ('\\' != *p) {
3367: res = mandoc_realloc(res, ssz + 2);
3368: res[ssz++] = *p++;
3369: continue;
3370: }
3371:
3372: /* Search for term matches. */
3373: for (cp = r->xmbtab; cp; cp = cp->next)
3374: if (0 == strncmp(p, cp->key.p, cp->key.sz))
3375: break;
3376:
3377: if (NULL != cp) {
3378: /*
3379: * A match has been found.
3380: * Append the match to the array and move
3381: * forward by its keysize.
3382: */
1.80 schwarze 3383: res = mandoc_realloc(res,
3384: ssz + cp->val.sz + 1);
1.42 schwarze 3385: memcpy(res + ssz, cp->val.p, cp->val.sz);
3386: ssz += cp->val.sz;
3387: p += (int)cp->key.sz;
3388: continue;
3389: }
3390:
3391: /*
3392: * Handle escapes carefully: we need to copy
3393: * over just the escape itself, or else we might
3394: * do replacements within the escape itself.
3395: * Make sure to pass along the bogus string.
3396: */
3397: pp = p++;
3398: esc = mandoc_escape(&p, NULL, NULL);
3399: if (ESCAPE_ERROR == esc) {
3400: sz = strlen(pp);
3401: res = mandoc_realloc(res, ssz + sz + 1);
3402: memcpy(res + ssz, pp, sz);
3403: break;
3404: }
1.80 schwarze 3405: /*
3406: * We bail out on bad escapes.
1.42 schwarze 3407: * No need to warn: we already did so when
3408: * roff_res() was called.
3409: */
3410: sz = (int)(p - pp);
3411: res = mandoc_realloc(res, ssz + sz + 1);
3412: memcpy(res + ssz, pp, sz);
3413: ssz += sz;
3414: }
3415:
3416: res[(int)ssz] = '\0';
3417: return(res);
1.99 schwarze 3418: }
3419:
3420: int
3421: roff_getformat(const struct roff *r)
3422: {
3423:
3424: return(r->format);
1.48 schwarze 3425: }
3426:
3427: /*
1.80 schwarze 3428: * Find out whether a line is a macro line or not.
1.48 schwarze 3429: * If it is, adjust the current position and return one; if it isn't,
3430: * return zero and don't change the current position.
3431: * If the control character has been set with `.cc', then let that grain
3432: * precedence.
3433: * This is slighly contrary to groff, where using the non-breaking
3434: * control character when `cc' has been invoked will cause the
3435: * non-breaking macro contents to be printed verbatim.
3436: */
3437: int
3438: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
3439: {
3440: int pos;
3441:
3442: pos = *ppos;
3443:
3444: if (0 != r->control && cp[pos] == r->control)
3445: pos++;
3446: else if (0 != r->control)
3447: return(0);
3448: else if ('\\' == cp[pos] && '.' == cp[pos + 1])
3449: pos += 2;
3450: else if ('.' == cp[pos] || '\'' == cp[pos])
3451: pos++;
3452: else
3453: return(0);
3454:
3455: while (' ' == cp[pos] || '\t' == cp[pos])
3456: pos++;
3457:
3458: *ppos = pos;
3459: return(1);
1.1 schwarze 3460: }
![[BACK]](/icons/back.gif){kind=icon}
Return to roff.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / mandoc