Annotation of src/usr.bin/mandoc/roff.c, Revision 1.167
1.167 ! schwarze 1: /* $OpenBSD: roff.c,v 1.166 2017/04/24 23:06:09 schwarze Exp $ */
1.1 schwarze 2: /*
1.139 schwarze 3: * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
1.159 schwarze 4: * Copyright (c) 2010-2015, 2017 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>
1.167 ! schwarze 23: #include <stddef.h>
! 24: #include <stdint.h>
1.51 schwarze 25: #include <stdio.h>
1.1 schwarze 26: #include <stdlib.h>
27: #include <string.h>
28:
29: #include "mandoc.h"
1.74 schwarze 30: #include "mandoc_aux.h"
1.167 ! schwarze 31: #include "mandoc_ohash.h"
1.137 schwarze 32: #include "roff.h"
1.98 daniel 33: #include "libmandoc.h"
1.138 schwarze 34: #include "roff_int.h"
1.27 schwarze 35: #include "libroff.h"
1.2 schwarze 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:
1.41 schwarze 42: /*
1.42 schwarze 43: * An incredibly-simple string buffer.
44: */
1.8 schwarze 45: struct roffstr {
1.42 schwarze 46: char *p; /* nil-terminated buffer */
47: size_t sz; /* saved strlen(p) */
48: };
49:
50: /*
51: * A key-value roffstr pair as part of a singly-linked list.
52: */
53: struct roffkv {
54: struct roffstr key;
55: struct roffstr val;
56: struct roffkv *next; /* next in list */
1.8 schwarze 57: };
58:
1.52 schwarze 59: /*
60: * A single number register as part of a singly-linked list.
61: */
62: struct roffreg {
63: struct roffstr key;
1.53 schwarze 64: int val;
1.52 schwarze 65: struct roffreg *next;
66: };
67:
1.167 ! schwarze 68: /*
! 69: * Association of request and macro names with token IDs.
! 70: */
! 71: struct roffreq {
! 72: enum roff_tok tok;
! 73: char name[];
! 74: };
! 75:
1.1 schwarze 76: struct roff {
1.35 schwarze 77: struct mparse *parse; /* parse point */
1.1 schwarze 78: struct roffnode *last; /* leaf of stack */
1.96 schwarze 79: int *rstack; /* stack of inverted `ie' values */
1.167 ! schwarze 80: struct ohash *reqtab; /* request lookup table */
1.52 schwarze 81: struct roffreg *regtab; /* number registers */
1.42 schwarze 82: struct roffkv *strtab; /* user-defined strings & macros */
83: struct roffkv *xmbtab; /* multi-byte trans table (`tr') */
84: struct roffstr *xtab; /* single-byte trans table (`tr') */
1.16 schwarze 85: const char *current_string; /* value of last called user macro */
1.27 schwarze 86: struct tbl_node *first_tbl; /* first table parsed */
87: struct tbl_node *last_tbl; /* last table parsed */
88: struct tbl_node *tbl; /* current table being parsed */
1.32 schwarze 89: struct eqn_node *last_eqn; /* last equation parsed */
90: struct eqn_node *first_eqn; /* first equation parsed */
91: struct eqn_node *eqn; /* current equation being parsed */
1.102 schwarze 92: int eqn_inline; /* current equation is inline */
1.96 schwarze 93: int options; /* parse options */
94: int rstacksz; /* current size limit of rstack */
95: int rstackpos; /* position in rstack */
1.99 schwarze 96: int format; /* current file in mdoc or man format */
1.145 schwarze 97: int argc; /* number of args of the last macro */
1.96 schwarze 98: char control; /* control character */
1.1 schwarze 99: };
100:
101: struct roffnode {
1.166 schwarze 102: enum roff_tok tok; /* type of node */
1.1 schwarze 103: struct roffnode *parent; /* up one in stack */
104: int line; /* parse line */
105: int col; /* parse col */
1.16 schwarze 106: char *name; /* node name, e.g. macro name */
1.2 schwarze 107: char *end; /* end-rules: custom token */
108: int endspan; /* end-rules: next-line or infty */
1.71 schwarze 109: int rule; /* current evaluation rule */
1.1 schwarze 110: };
111:
112: #define ROFF_ARGS struct roff *r, /* parse ctx */ \
1.166 schwarze 113: enum roff_tok tok, /* tok of macro */ \
1.110 schwarze 114: struct buf *buf, /* input buffer */ \
1.1 schwarze 115: int ln, /* parse line */ \
1.2 schwarze 116: int ppos, /* original pos in buffer */ \
117: int pos, /* current pos in buffer */ \
118: int *offs /* reset offset of buffer data */
1.1 schwarze 119:
120: typedef enum rofferr (*roffproc)(ROFF_ARGS);
121:
122: struct roffmac {
1.2 schwarze 123: roffproc proc; /* process new macro */
124: roffproc text; /* process as child text of macro */
125: roffproc sub; /* process as child of macro */
126: int flags;
127: #define ROFFMAC_STRUCT (1 << 0) /* always interpret */
1.1 schwarze 128: };
129:
1.37 schwarze 130: struct predef {
131: const char *name; /* predefined input name */
132: const char *str; /* replacement symbol */
133: };
134:
135: #define PREDEF(__name, __str) \
136: { (__name), (__str) },
137:
1.138 schwarze 138: /* --- function prototypes ------------------------------------------------ */
139:
1.42 schwarze 140: static void roffnode_cleanscope(struct roff *);
141: static void roffnode_pop(struct roff *);
1.166 schwarze 142: static void roffnode_push(struct roff *, enum roff_tok,
1.42 schwarze 143: const char *, int, int);
1.2 schwarze 144: static enum rofferr roff_block(ROFF_ARGS);
145: static enum rofferr roff_block_text(ROFF_ARGS);
146: static enum rofferr roff_block_sub(ROFF_ARGS);
1.123 schwarze 147: static enum rofferr roff_brp(ROFF_ARGS);
1.2 schwarze 148: static enum rofferr roff_cblock(ROFF_ARGS);
1.48 schwarze 149: static enum rofferr roff_cc(ROFF_ARGS);
1.68 schwarze 150: static void roff_ccond(struct roff *, int, int);
1.2 schwarze 151: static enum rofferr roff_cond(ROFF_ARGS);
152: static enum rofferr roff_cond_text(ROFF_ARGS);
153: static enum rofferr roff_cond_sub(ROFF_ARGS);
1.7 schwarze 154: static enum rofferr roff_ds(ROFF_ARGS);
1.110 schwarze 155: static enum rofferr roff_eqndelim(struct roff *, struct buf *, int);
1.143 schwarze 156: static int roff_evalcond(struct roff *r, int, char *, int *);
1.106 schwarze 157: static int roff_evalnum(struct roff *, int,
158: const char *, int *, int *, int);
159: static int roff_evalpar(struct roff *, int,
1.133 schwarze 160: const char *, int *, int *, int);
1.71 schwarze 161: static int roff_evalstrcond(const char *, int *);
1.42 schwarze 162: static void roff_free1(struct roff *);
1.52 schwarze 163: static void roff_freereg(struct roffreg *);
1.42 schwarze 164: static void roff_freestr(struct roffkv *);
1.85 schwarze 165: static size_t roff_getname(struct roff *, char **, int, int);
1.133 schwarze 166: static int roff_getnum(const char *, int *, int *, int);
1.56 schwarze 167: static int roff_getop(const char *, int *, char *);
1.53 schwarze 168: static int roff_getregn(const struct roff *,
169: const char *, size_t);
1.145 schwarze 170: static int roff_getregro(const struct roff *,
171: const char *name);
1.80 schwarze 172: static const char *roff_getstrn(const struct roff *,
1.8 schwarze 173: const char *, size_t);
1.143 schwarze 174: static int roff_hasregn(const struct roff *,
175: const char *, size_t);
1.123 schwarze 176: static enum rofferr roff_insec(ROFF_ARGS);
1.51 schwarze 177: static enum rofferr roff_it(ROFF_ARGS);
1.21 schwarze 178: static enum rofferr roff_line_ignore(ROFF_ARGS);
1.137 schwarze 179: static void roff_man_alloc1(struct roff_man *);
180: static void roff_man_free1(struct roff_man *);
1.6 schwarze 181: static enum rofferr roff_nr(ROFF_ARGS);
1.166 schwarze 182: static enum roff_tok roff_parse(struct roff *, char *, int *,
1.87 schwarze 183: int, int);
1.110 schwarze 184: static enum rofferr roff_parsetext(struct buf *, int, int *);
185: static enum rofferr roff_res(struct roff *, struct buf *, int, int);
1.29 schwarze 186: static enum rofferr roff_rm(ROFF_ARGS);
1.76 schwarze 187: static enum rofferr roff_rr(ROFF_ARGS);
1.8 schwarze 188: static void roff_setstr(struct roff *,
1.16 schwarze 189: const char *, const char *, int);
1.80 schwarze 190: static void roff_setstrn(struct roffkv **, const char *,
1.42 schwarze 191: size_t, const char *, size_t, int);
1.14 schwarze 192: static enum rofferr roff_so(ROFF_ARGS);
1.42 schwarze 193: static enum rofferr roff_tr(ROFF_ARGS);
1.47 schwarze 194: static enum rofferr roff_Dd(ROFF_ARGS);
195: static enum rofferr roff_TH(ROFF_ARGS);
1.27 schwarze 196: static enum rofferr roff_TE(ROFF_ARGS);
197: static enum rofferr roff_TS(ROFF_ARGS);
1.32 schwarze 198: static enum rofferr roff_EQ(ROFF_ARGS);
199: static enum rofferr roff_EN(ROFF_ARGS);
1.27 schwarze 200: static enum rofferr roff_T_(ROFF_ARGS);
1.123 schwarze 201: static enum rofferr roff_unsupp(ROFF_ARGS);
1.16 schwarze 202: static enum rofferr roff_userdef(ROFF_ARGS);
1.1 schwarze 203:
1.138 schwarze 204: /* --- constant data ------------------------------------------------------ */
205:
1.133 schwarze 206: #define ROFFNUM_SCALE (1 << 0) /* Honour scaling in roff_getnum(). */
207: #define ROFFNUM_WHITE (1 << 1) /* Skip whitespace in roff_evalnum(). */
208:
1.166 schwarze 209: const char *__roff_name[MAN_MAX + 1] = {
210: "ab", "ad", "af", "aln",
211: "als", "am", "am1", "ami",
212: "ami1", "as", "as1", "asciify",
213: "backtrace", "bd", "bleedat", "blm",
214: "box", "boxa", "bp", "BP",
215: "break", "breakchar", "brnl", "brp",
216: "brpnl", "c2", "cc", "ce",
217: "cf", "cflags", "ch", "char",
218: "chop", "class", "close", "CL",
219: "color", "composite", "continue", "cp",
220: "cropat", "cs", "cu", "da",
221: "dch", "Dd", "de", "de1",
222: "defcolor", "dei", "dei1", "device",
223: "devicem", "di", "do", "ds",
224: "ds1", "dwh", "dt", "ec",
225: "ecr", "ecs", "el", "em",
226: "EN", "eo", "EP", "EQ",
227: "errprint", "ev", "evc", "ex",
228: "fallback", "fam", "fc", "fchar",
229: "fcolor", "fdeferlig", "feature", "fkern",
230: "fl", "flig", "fp", "fps",
231: "fschar", "fspacewidth", "fspecial", "ftr",
232: "fzoom", "gcolor", "hc", "hcode",
233: "hidechar", "hla", "hlm", "hpf",
234: "hpfa", "hpfcode", "hw", "hy",
235: "hylang", "hylen", "hym", "hypp",
236: "hys", "ie", "if", "ig",
237: "index", "it", "itc", "IX",
238: "kern", "kernafter", "kernbefore", "kernpair",
239: "lc", "lc_ctype", "lds", "length",
240: "letadj", "lf", "lg", "lhang",
241: "linetabs", "lnr", "lnrf", "lpfx",
242: "ls", "lsm", "lt", "mc",
243: "mediasize", "minss", "mk", "mso",
244: "na", "ne", "nh", "nhychar",
245: "nm", "nn", "nop", "nr",
246: "nrf", "nroff", "ns", "nx",
247: "open", "opena", "os", "output",
248: "padj", "papersize", "pc", "pev",
249: "pi", "PI", "pl", "pm",
250: "pn", "pnr", "po", "ps",
251: "psbb", "pshape", "pso", "ptr",
252: "pvs", "rchar", "rd", "recursionlimit",
253: "return", "rfschar", "rhang", "rj",
254: "rm", "rn", "rnn", "rr",
255: "rs", "rt", "schar", "sentchar",
256: "shc", "shift", "sizes", "so",
257: "spacewidth", "special", "spreadwarn", "ss",
258: "sty", "substring", "sv", "sy",
259: "T&", "ta", "tc", "TE",
260: "TH", "ti", "tkf", "tl",
261: "tm", "tm1", "tmc", "tr",
262: "track", "transchar", "trf", "trimat",
263: "trin", "trnt", "troff", "TS",
264: "uf", "ul", "unformat", "unwatch",
265: "unwatchn", "vpt", "vs", "warn",
266: "warnscale", "watch", "watchlength", "watchn",
267: "wh", "while", "write", "writec",
268: "writem", "xflag", ".", NULL,
269: "text",
270: "Dd", "Dt", "Os", "Sh",
271: "Ss", "Pp", "D1", "Dl",
272: "Bd", "Ed", "Bl", "El",
273: "It", "Ad", "An", "Ap",
274: "Ar", "Cd", "Cm", "Dv",
275: "Er", "Ev", "Ex", "Fa",
276: "Fd", "Fl", "Fn", "Ft",
277: "Ic", "In", "Li", "Nd",
278: "Nm", "Op", "Ot", "Pa",
279: "Rv", "St", "Va", "Vt",
280: "Xr", "%A", "%B", "%D",
281: "%I", "%J", "%N", "%O",
282: "%P", "%R", "%T", "%V",
283: "Ac", "Ao", "Aq", "At",
284: "Bc", "Bf", "Bo", "Bq",
285: "Bsx", "Bx", "Db", "Dc",
286: "Do", "Dq", "Ec", "Ef",
287: "Em", "Eo", "Fx", "Ms",
288: "No", "Ns", "Nx", "Ox",
289: "Pc", "Pf", "Po", "Pq",
290: "Qc", "Ql", "Qo", "Qq",
291: "Re", "Rs", "Sc", "So",
292: "Sq", "Sm", "Sx", "Sy",
293: "Tn", "Ux", "Xc", "Xo",
294: "Fo", "Fc", "Oo", "Oc",
295: "Bk", "Ek", "Bt", "Hf",
296: "Fr", "Ud", "Lb", "Lp",
297: "Lk", "Mt", "Brq", "Bro",
298: "Brc", "%C", "Es", "En",
299: "Dx", "%Q", "br", "sp",
300: "%U", "Ta", "ll", NULL,
301: "TH", "SH", "SS", "TP",
302: "LP", "PP", "P", "IP",
303: "HP", "SM", "SB", "BI",
304: "IB", "BR", "RB", "R",
305: "B", "I", "IR", "RI",
306: "br", "sp", "nf", "fi",
307: "RE", "RS", "DT", "UC",
308: "PD", "AT", "in", "ft",
309: "OP", "EX", "EE", "UR",
310: "UE", "ll", NULL
311: };
312: const char *const *roff_name = __roff_name;
313:
314: static struct roffmac roffs[TOKEN_NONE] = {
1.167 ! schwarze 315: { roff_unsupp, NULL, NULL, 0 }, /* ab */
! 316: { roff_line_ignore, NULL, NULL, 0 }, /* ad */
! 317: { roff_line_ignore, NULL, NULL, 0 }, /* af */
! 318: { roff_unsupp, NULL, NULL, 0 }, /* aln */
! 319: { roff_unsupp, NULL, NULL, 0 }, /* als */
! 320: { roff_block, roff_block_text, roff_block_sub, 0 }, /* am */
! 321: { roff_block, roff_block_text, roff_block_sub, 0 }, /* am1 */
! 322: { roff_block, roff_block_text, roff_block_sub, 0 }, /* ami */
! 323: { roff_block, roff_block_text, roff_block_sub, 0 }, /* ami1 */
! 324: { roff_ds, NULL, NULL, 0 }, /* as */
! 325: { roff_ds, NULL, NULL, 0 }, /* as1 */
! 326: { roff_unsupp, NULL, NULL, 0 }, /* asciify */
! 327: { roff_line_ignore, NULL, NULL, 0 }, /* backtrace */
! 328: { roff_line_ignore, NULL, NULL, 0 }, /* bd */
! 329: { roff_line_ignore, NULL, NULL, 0 }, /* bleedat */
! 330: { roff_unsupp, NULL, NULL, 0 }, /* blm */
! 331: { roff_unsupp, NULL, NULL, 0 }, /* box */
! 332: { roff_unsupp, NULL, NULL, 0 }, /* boxa */
! 333: { roff_line_ignore, NULL, NULL, 0 }, /* bp */
! 334: { roff_unsupp, NULL, NULL, 0 }, /* BP */
! 335: { roff_unsupp, NULL, NULL, 0 }, /* break */
! 336: { roff_line_ignore, NULL, NULL, 0 }, /* breakchar */
! 337: { roff_line_ignore, NULL, NULL, 0 }, /* brnl */
! 338: { roff_brp, NULL, NULL, 0 }, /* brp */
! 339: { roff_line_ignore, NULL, NULL, 0 }, /* brpnl */
! 340: { roff_unsupp, NULL, NULL, 0 }, /* c2 */
! 341: { roff_cc, NULL, NULL, 0 }, /* cc */
! 342: { roff_line_ignore, NULL, NULL, 0 }, /* ce */
! 343: { roff_insec, NULL, NULL, 0 }, /* cf */
! 344: { roff_line_ignore, NULL, NULL, 0 }, /* cflags */
! 345: { roff_line_ignore, NULL, NULL, 0 }, /* ch */
! 346: { roff_unsupp, NULL, NULL, 0 }, /* char */
! 347: { roff_unsupp, NULL, NULL, 0 }, /* chop */
! 348: { roff_line_ignore, NULL, NULL, 0 }, /* class */
! 349: { roff_insec, NULL, NULL, 0 }, /* close */
! 350: { roff_unsupp, NULL, NULL, 0 }, /* CL */
! 351: { roff_line_ignore, NULL, NULL, 0 }, /* color */
! 352: { roff_unsupp, NULL, NULL, 0 }, /* composite */
! 353: { roff_unsupp, NULL, NULL, 0 }, /* continue */
! 354: { roff_line_ignore, NULL, NULL, 0 }, /* cp */
! 355: { roff_line_ignore, NULL, NULL, 0 }, /* cropat */
! 356: { roff_line_ignore, NULL, NULL, 0 }, /* cs */
! 357: { roff_line_ignore, NULL, NULL, 0 }, /* cu */
! 358: { roff_unsupp, NULL, NULL, 0 }, /* da */
! 359: { roff_unsupp, NULL, NULL, 0 }, /* dch */
! 360: { roff_Dd, NULL, NULL, 0 }, /* Dd */
! 361: { roff_block, roff_block_text, roff_block_sub, 0 }, /* de */
! 362: { roff_block, roff_block_text, roff_block_sub, 0 }, /* de1 */
! 363: { roff_line_ignore, NULL, NULL, 0 }, /* defcolor */
! 364: { roff_block, roff_block_text, roff_block_sub, 0 }, /* dei */
! 365: { roff_block, roff_block_text, roff_block_sub, 0 }, /* dei1 */
! 366: { roff_unsupp, NULL, NULL, 0 }, /* device */
! 367: { roff_unsupp, NULL, NULL, 0 }, /* devicem */
! 368: { roff_unsupp, NULL, NULL, 0 }, /* di */
! 369: { roff_unsupp, NULL, NULL, 0 }, /* do */
! 370: { roff_ds, NULL, NULL, 0 }, /* ds */
! 371: { roff_ds, NULL, NULL, 0 }, /* ds1 */
! 372: { roff_unsupp, NULL, NULL, 0 }, /* dwh */
! 373: { roff_unsupp, NULL, NULL, 0 }, /* dt */
! 374: { roff_unsupp, NULL, NULL, 0 }, /* ec */
! 375: { roff_unsupp, NULL, NULL, 0 }, /* ecr */
! 376: { roff_unsupp, NULL, NULL, 0 }, /* ecs */
! 377: { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT }, /* el */
! 378: { roff_unsupp, NULL, NULL, 0 }, /* em */
! 379: { roff_EN, NULL, NULL, 0 }, /* EN */
! 380: { roff_unsupp, NULL, NULL, 0 }, /* eo */
! 381: { roff_unsupp, NULL, NULL, 0 }, /* EP */
! 382: { roff_EQ, NULL, NULL, 0 }, /* EQ */
! 383: { roff_line_ignore, NULL, NULL, 0 }, /* errprint */
! 384: { roff_unsupp, NULL, NULL, 0 }, /* ev */
! 385: { roff_unsupp, NULL, NULL, 0 }, /* evc */
! 386: { roff_unsupp, NULL, NULL, 0 }, /* ex */
! 387: { roff_line_ignore, NULL, NULL, 0 }, /* fallback */
! 388: { roff_line_ignore, NULL, NULL, 0 }, /* fam */
! 389: { roff_unsupp, NULL, NULL, 0 }, /* fc */
! 390: { roff_unsupp, NULL, NULL, 0 }, /* fchar */
! 391: { roff_line_ignore, NULL, NULL, 0 }, /* fcolor */
! 392: { roff_line_ignore, NULL, NULL, 0 }, /* fdeferlig */
! 393: { roff_line_ignore, NULL, NULL, 0 }, /* feature */
! 394: { roff_line_ignore, NULL, NULL, 0 }, /* fkern */
! 395: { roff_line_ignore, NULL, NULL, 0 }, /* fl */
! 396: { roff_line_ignore, NULL, NULL, 0 }, /* flig */
! 397: { roff_line_ignore, NULL, NULL, 0 }, /* fp */
! 398: { roff_line_ignore, NULL, NULL, 0 }, /* fps */
! 399: { roff_unsupp, NULL, NULL, 0 }, /* fschar */
! 400: { roff_line_ignore, NULL, NULL, 0 }, /* fspacewidth */
! 401: { roff_line_ignore, NULL, NULL, 0 }, /* fspecial */
! 402: { roff_line_ignore, NULL, NULL, 0 }, /* ftr */
! 403: { roff_line_ignore, NULL, NULL, 0 }, /* fzoom */
! 404: { roff_line_ignore, NULL, NULL, 0 }, /* gcolor */
! 405: { roff_line_ignore, NULL, NULL, 0 }, /* hc */
! 406: { roff_line_ignore, NULL, NULL, 0 }, /* hcode */
! 407: { roff_line_ignore, NULL, NULL, 0 }, /* hidechar */
! 408: { roff_line_ignore, NULL, NULL, 0 }, /* hla */
! 409: { roff_line_ignore, NULL, NULL, 0 }, /* hlm */
! 410: { roff_line_ignore, NULL, NULL, 0 }, /* hpf */
! 411: { roff_line_ignore, NULL, NULL, 0 }, /* hpfa */
! 412: { roff_line_ignore, NULL, NULL, 0 }, /* hpfcode */
! 413: { roff_line_ignore, NULL, NULL, 0 }, /* hw */
! 414: { roff_line_ignore, NULL, NULL, 0 }, /* hy */
! 415: { roff_line_ignore, NULL, NULL, 0 }, /* hylang */
! 416: { roff_line_ignore, NULL, NULL, 0 }, /* hylen */
! 417: { roff_line_ignore, NULL, NULL, 0 }, /* hym */
! 418: { roff_line_ignore, NULL, NULL, 0 }, /* hypp */
! 419: { roff_line_ignore, NULL, NULL, 0 }, /* hys */
! 420: { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT }, /* ie */
! 421: { roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT }, /* if */
! 422: { roff_block, roff_block_text, roff_block_sub, 0 }, /* ig */
! 423: { roff_unsupp, NULL, NULL, 0 }, /* index */
! 424: { roff_it, NULL, NULL, 0 }, /* it */
! 425: { roff_unsupp, NULL, NULL, 0 }, /* itc */
! 426: { roff_line_ignore, NULL, NULL, 0 }, /* IX */
! 427: { roff_line_ignore, NULL, NULL, 0 }, /* kern */
! 428: { roff_line_ignore, NULL, NULL, 0 }, /* kernafter */
! 429: { roff_line_ignore, NULL, NULL, 0 }, /* kernbefore */
! 430: { roff_line_ignore, NULL, NULL, 0 }, /* kernpair */
! 431: { roff_unsupp, NULL, NULL, 0 }, /* lc */
! 432: { roff_unsupp, NULL, NULL, 0 }, /* lc_ctype */
! 433: { roff_unsupp, NULL, NULL, 0 }, /* lds */
! 434: { roff_unsupp, NULL, NULL, 0 }, /* length */
! 435: { roff_line_ignore, NULL, NULL, 0 }, /* letadj */
! 436: { roff_insec, NULL, NULL, 0 }, /* lf */
! 437: { roff_line_ignore, NULL, NULL, 0 }, /* lg */
! 438: { roff_line_ignore, NULL, NULL, 0 }, /* lhang */
! 439: { roff_unsupp, NULL, NULL, 0 }, /* linetabs */
! 440: { roff_unsupp, NULL, NULL, 0 }, /* lnr */
! 441: { roff_unsupp, NULL, NULL, 0 }, /* lnrf */
! 442: { roff_unsupp, NULL, NULL, 0 }, /* lpfx */
! 443: { roff_line_ignore, NULL, NULL, 0 }, /* ls */
! 444: { roff_unsupp, NULL, NULL, 0 }, /* lsm */
! 445: { roff_line_ignore, NULL, NULL, 0 }, /* lt */
! 446: { roff_line_ignore, NULL, NULL, 0 }, /* mc */
! 447: { roff_line_ignore, NULL, NULL, 0 }, /* mediasize */
! 448: { roff_line_ignore, NULL, NULL, 0 }, /* minss */
! 449: { roff_line_ignore, NULL, NULL, 0 }, /* mk */
! 450: { roff_insec, NULL, NULL, 0 }, /* mso */
! 451: { roff_line_ignore, NULL, NULL, 0 }, /* na */
! 452: { roff_line_ignore, NULL, NULL, 0 }, /* ne */
! 453: { roff_line_ignore, NULL, NULL, 0 }, /* nh */
! 454: { roff_line_ignore, NULL, NULL, 0 }, /* nhychar */
! 455: { roff_unsupp, NULL, NULL, 0 }, /* nm */
! 456: { roff_unsupp, NULL, NULL, 0 }, /* nn */
! 457: { roff_unsupp, NULL, NULL, 0 }, /* nop */
! 458: { roff_nr, NULL, NULL, 0 }, /* nr */
! 459: { roff_unsupp, NULL, NULL, 0 }, /* nrf */
! 460: { roff_line_ignore, NULL, NULL, 0 }, /* nroff */
! 461: { roff_line_ignore, NULL, NULL, 0 }, /* ns */
! 462: { roff_insec, NULL, NULL, 0 }, /* nx */
! 463: { roff_insec, NULL, NULL, 0 }, /* open */
! 464: { roff_insec, NULL, NULL, 0 }, /* opena */
! 465: { roff_line_ignore, NULL, NULL, 0 }, /* os */
! 466: { roff_unsupp, NULL, NULL, 0 }, /* output */
! 467: { roff_line_ignore, NULL, NULL, 0 }, /* padj */
! 468: { roff_line_ignore, NULL, NULL, 0 }, /* papersize */
! 469: { roff_line_ignore, NULL, NULL, 0 }, /* pc */
! 470: { roff_line_ignore, NULL, NULL, 0 }, /* pev */
! 471: { roff_insec, NULL, NULL, 0 }, /* pi */
! 472: { roff_unsupp, NULL, NULL, 0 }, /* PI */
! 473: { roff_line_ignore, NULL, NULL, 0 }, /* pl */
! 474: { roff_line_ignore, NULL, NULL, 0 }, /* pm */
! 475: { roff_line_ignore, NULL, NULL, 0 }, /* pn */
! 476: { roff_line_ignore, NULL, NULL, 0 }, /* pnr */
! 477: { roff_line_ignore, NULL, NULL, 0 }, /* po */
! 478: { roff_line_ignore, NULL, NULL, 0 }, /* ps */
! 479: { roff_unsupp, NULL, NULL, 0 }, /* psbb */
! 480: { roff_unsupp, NULL, NULL, 0 }, /* pshape */
! 481: { roff_insec, NULL, NULL, 0 }, /* pso */
! 482: { roff_line_ignore, NULL, NULL, 0 }, /* ptr */
! 483: { roff_line_ignore, NULL, NULL, 0 }, /* pvs */
! 484: { roff_unsupp, NULL, NULL, 0 }, /* rchar */
! 485: { roff_line_ignore, NULL, NULL, 0 }, /* rd */
! 486: { roff_line_ignore, NULL, NULL, 0 }, /* recursionlimit */
! 487: { roff_unsupp, NULL, NULL, 0 }, /* return */
! 488: { roff_unsupp, NULL, NULL, 0 }, /* rfschar */
! 489: { roff_line_ignore, NULL, NULL, 0 }, /* rhang */
! 490: { roff_line_ignore, NULL, NULL, 0 }, /* rj */
! 491: { roff_rm, NULL, NULL, 0 }, /* rm */
! 492: { roff_unsupp, NULL, NULL, 0 }, /* rn */
! 493: { roff_unsupp, NULL, NULL, 0 }, /* rnn */
! 494: { roff_rr, NULL, NULL, 0 }, /* rr */
! 495: { roff_line_ignore, NULL, NULL, 0 }, /* rs */
! 496: { roff_line_ignore, NULL, NULL, 0 }, /* rt */
! 497: { roff_unsupp, NULL, NULL, 0 }, /* schar */
! 498: { roff_line_ignore, NULL, NULL, 0 }, /* sentchar */
! 499: { roff_line_ignore, NULL, NULL, 0 }, /* shc */
! 500: { roff_unsupp, NULL, NULL, 0 }, /* shift */
! 501: { roff_line_ignore, NULL, NULL, 0 }, /* sizes */
! 502: { roff_so, NULL, NULL, 0 }, /* so */
! 503: { roff_line_ignore, NULL, NULL, 0 }, /* spacewidth */
! 504: { roff_line_ignore, NULL, NULL, 0 }, /* special */
! 505: { roff_line_ignore, NULL, NULL, 0 }, /* spreadwarn */
! 506: { roff_line_ignore, NULL, NULL, 0 }, /* ss */
! 507: { roff_line_ignore, NULL, NULL, 0 }, /* sty */
! 508: { roff_unsupp, NULL, NULL, 0 }, /* substring */
! 509: { roff_line_ignore, NULL, NULL, 0 }, /* sv */
! 510: { roff_insec, NULL, NULL, 0 }, /* sy */
! 511: { roff_T_, NULL, NULL, 0 }, /* T& */
! 512: { roff_unsupp, NULL, NULL, 0 }, /* ta */
! 513: { roff_unsupp, NULL, NULL, 0 }, /* tc */
! 514: { roff_TE, NULL, NULL, 0 }, /* TE */
! 515: { roff_TH, NULL, NULL, 0 }, /* TH */
! 516: { roff_unsupp, NULL, NULL, 0 }, /* ti */
! 517: { roff_line_ignore, NULL, NULL, 0 }, /* tkf */
! 518: { roff_unsupp, NULL, NULL, 0 }, /* tl */
! 519: { roff_line_ignore, NULL, NULL, 0 }, /* tm */
! 520: { roff_line_ignore, NULL, NULL, 0 }, /* tm1 */
! 521: { roff_line_ignore, NULL, NULL, 0 }, /* tmc */
! 522: { roff_tr, NULL, NULL, 0 }, /* tr */
! 523: { roff_line_ignore, NULL, NULL, 0 }, /* track */
! 524: { roff_line_ignore, NULL, NULL, 0 }, /* transchar */
! 525: { roff_insec, NULL, NULL, 0 }, /* trf */
! 526: { roff_line_ignore, NULL, NULL, 0 }, /* trimat */
! 527: { roff_unsupp, NULL, NULL, 0 }, /* trin */
! 528: { roff_unsupp, NULL, NULL, 0 }, /* trnt */
! 529: { roff_line_ignore, NULL, NULL, 0 }, /* troff */
! 530: { roff_TS, NULL, NULL, 0 }, /* TS */
! 531: { roff_line_ignore, NULL, NULL, 0 }, /* uf */
! 532: { roff_line_ignore, NULL, NULL, 0 }, /* ul */
! 533: { roff_unsupp, NULL, NULL, 0 }, /* unformat */
! 534: { roff_line_ignore, NULL, NULL, 0 }, /* unwatch */
! 535: { roff_line_ignore, NULL, NULL, 0 }, /* unwatchn */
! 536: { roff_line_ignore, NULL, NULL, 0 }, /* vpt */
! 537: { roff_line_ignore, NULL, NULL, 0 }, /* vs */
! 538: { roff_line_ignore, NULL, NULL, 0 }, /* warn */
! 539: { roff_line_ignore, NULL, NULL, 0 }, /* warnscale */
! 540: { roff_line_ignore, NULL, NULL, 0 }, /* watch */
! 541: { roff_line_ignore, NULL, NULL, 0 }, /* watchlength */
! 542: { roff_line_ignore, NULL, NULL, 0 }, /* watchn */
! 543: { roff_unsupp, NULL, NULL, 0 }, /* wh */
! 544: { roff_unsupp, NULL, NULL, 0 }, /* while */
! 545: { roff_insec, NULL, NULL, 0 }, /* write */
! 546: { roff_insec, NULL, NULL, 0 }, /* writec */
! 547: { roff_insec, NULL, NULL, 0 }, /* writem */
! 548: { roff_line_ignore, NULL, NULL, 0 }, /* xflag */
! 549: { roff_cblock, NULL, NULL, 0 }, /* . */
! 550: { roff_userdef, NULL, NULL, 0 }
1.1 schwarze 551: };
552:
1.73 schwarze 553: /* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
1.47 schwarze 554: const char *const __mdoc_reserved[] = {
555: "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
556: "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
557: "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
558: "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
1.73 schwarze 559: "Dt", "Dv", "Dx", "D1",
560: "Ec", "Ed", "Ef", "Ek", "El", "Em",
561: "En", "Eo", "Er", "Es", "Ev", "Ex",
1.47 schwarze 562: "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
1.73 schwarze 563: "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
564: "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
1.47 schwarze 565: "Oc", "Oo", "Op", "Os", "Ot", "Ox",
1.73 schwarze 566: "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
567: "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
568: "Sc", "Sh", "Sm", "So", "Sq",
1.47 schwarze 569: "Ss", "St", "Sx", "Sy",
570: "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
1.73 schwarze 571: "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
1.47 schwarze 572: "%P", "%Q", "%R", "%T", "%U", "%V",
573: NULL
574: };
575:
1.73 schwarze 576: /* not currently implemented: BT DE DS ME MT PT SY TQ YS */
1.47 schwarze 577: const char *const __man_reserved[] = {
1.73 schwarze 578: "AT", "B", "BI", "BR", "DT",
579: "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
580: "LP", "OP", "P", "PD", "PP",
581: "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
582: "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
1.47 schwarze 583: NULL
584: };
585:
1.37 schwarze 586: /* Array of injected predefined strings. */
587: #define PREDEFS_MAX 38
588: static const struct predef predefs[PREDEFS_MAX] = {
589: #include "predefs.in"
590: };
591:
1.51 schwarze 592: static int roffit_lines; /* number of lines to delay */
593: static char *roffit_macro; /* nil-terminated macro line */
594:
1.80 schwarze 595:
1.138 schwarze 596: /* --- request table ------------------------------------------------------ */
597:
1.167 ! schwarze 598: struct ohash *
! 599: roffhash_alloc(enum roff_tok mintok, enum roff_tok maxtok)
1.3 schwarze 600: {
1.167 ! schwarze 601: struct ohash *htab;
! 602: struct roffreq *req;
! 603: enum roff_tok tok;
! 604: size_t sz;
! 605: unsigned int slot;
1.3 schwarze 606:
1.167 ! schwarze 607: htab = mandoc_malloc(sizeof(*htab));
! 608: mandoc_ohash_init(htab, 8, offsetof(struct roffreq, name));
1.3 schwarze 609:
1.167 ! schwarze 610: for (tok = mintok; tok < maxtok; tok++) {
! 611: sz = strlen(roff_name[tok]);
! 612: req = mandoc_malloc(sizeof(*req) + sz + 1);
! 613: req->tok = tok;
! 614: memcpy(req->name, roff_name[tok], sz + 1);
! 615: slot = ohash_qlookup(htab, req->name);
! 616: ohash_insert(htab, slot, req);
1.3 schwarze 617: }
1.167 ! schwarze 618: return htab;
1.3 schwarze 619: }
620:
1.167 ! schwarze 621: void
! 622: roffhash_free(struct ohash *htab)
1.1 schwarze 623: {
1.167 ! schwarze 624: struct roffreq *req;
! 625: unsigned int slot;
1.1 schwarze 626:
1.167 ! schwarze 627: if (htab == NULL)
! 628: return;
! 629: for (req = ohash_first(htab, &slot); req != NULL;
! 630: req = ohash_next(htab, &slot))
! 631: free(req);
! 632: ohash_delete(htab);
! 633: free(htab);
! 634: }
! 635:
! 636: enum roff_tok
! 637: roffhash_find(struct ohash *htab, const char *name, size_t sz)
! 638: {
! 639: struct roffreq *req;
! 640: const char *end;
! 641:
! 642: if (sz) {
! 643: end = name + sz;
! 644: req = ohash_find(htab, ohash_qlookupi(htab, name, &end));
! 645: } else
! 646: req = ohash_find(htab, ohash_qlookup(htab, name));
! 647: return req == NULL ? TOKEN_NONE : req->tok;
1.1 schwarze 648: }
649:
1.138 schwarze 650: /* --- stack of request blocks -------------------------------------------- */
651:
1.1 schwarze 652: /*
653: * Pop the current node off of the stack of roff instructions currently
654: * pending.
655: */
656: static void
657: roffnode_pop(struct roff *r)
658: {
659: struct roffnode *p;
660:
1.2 schwarze 661: assert(r->last);
1.80 schwarze 662: p = r->last;
1.2 schwarze 663:
664: r->last = r->last->parent;
1.16 schwarze 665: free(p->name);
666: free(p->end);
1.1 schwarze 667: free(p);
668: }
669:
670: /*
671: * Push a roff node onto the instruction stack. This must later be
672: * removed with roffnode_pop().
673: */
1.11 schwarze 674: static void
1.166 schwarze 675: roffnode_push(struct roff *r, enum roff_tok tok, const char *name,
1.16 schwarze 676: int line, int col)
1.1 schwarze 677: {
678: struct roffnode *p;
679:
1.11 schwarze 680: p = mandoc_calloc(1, sizeof(struct roffnode));
1.1 schwarze 681: p->tok = tok;
1.16 schwarze 682: if (name)
683: p->name = mandoc_strdup(name);
1.1 schwarze 684: p->parent = r->last;
685: p->line = line;
686: p->col = col;
1.71 schwarze 687: p->rule = p->parent ? p->parent->rule : 0;
1.1 schwarze 688:
689: r->last = p;
690: }
691:
1.138 schwarze 692: /* --- roff parser state data management ---------------------------------- */
693:
1.1 schwarze 694: static void
695: roff_free1(struct roff *r)
696: {
1.49 schwarze 697: struct tbl_node *tbl;
1.32 schwarze 698: struct eqn_node *e;
1.42 schwarze 699: int i;
1.27 schwarze 700:
1.49 schwarze 701: while (NULL != (tbl = r->first_tbl)) {
702: r->first_tbl = tbl->next;
703: tbl_free(tbl);
1.27 schwarze 704: }
705: r->first_tbl = r->last_tbl = r->tbl = NULL;
1.1 schwarze 706:
1.32 schwarze 707: while (NULL != (e = r->first_eqn)) {
708: r->first_eqn = e->next;
709: eqn_free(e);
710: }
711: r->first_eqn = r->last_eqn = r->eqn = NULL;
712:
1.1 schwarze 713: while (r->last)
714: roffnode_pop(r);
1.27 schwarze 715:
1.96 schwarze 716: free (r->rstack);
717: r->rstack = NULL;
718: r->rstacksz = 0;
719: r->rstackpos = -1;
720:
721: roff_freereg(r->regtab);
722: r->regtab = NULL;
723:
1.42 schwarze 724: roff_freestr(r->strtab);
725: roff_freestr(r->xmbtab);
726: r->strtab = r->xmbtab = NULL;
727:
728: if (r->xtab)
729: for (i = 0; i < 128; i++)
730: free(r->xtab[i].p);
731: free(r->xtab);
732: r->xtab = NULL;
1.1 schwarze 733: }
734:
735: void
736: roff_reset(struct roff *r)
737: {
738: roff_free1(r);
1.99 schwarze 739: r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
1.48 schwarze 740: r->control = 0;
1.1 schwarze 741: }
742:
743: void
744: roff_free(struct roff *r)
745: {
746: roff_free1(r);
1.167 ! schwarze 747: roffhash_free(r->reqtab);
1.1 schwarze 748: free(r);
749: }
750:
751: struct roff *
1.151 schwarze 752: roff_alloc(struct mparse *parse, int options)
1.1 schwarze 753: {
754: struct roff *r;
755:
1.11 schwarze 756: r = mandoc_calloc(1, sizeof(struct roff));
1.35 schwarze 757: r->parse = parse;
1.167 ! schwarze 758: r->reqtab = roffhash_alloc(0, ROFF_USERDEF);
1.72 schwarze 759: r->options = options;
1.99 schwarze 760: r->format = options & (MPARSE_MDOC | MPARSE_MAN);
1.2 schwarze 761: r->rstackpos = -1;
1.149 schwarze 762: return r;
1.137 schwarze 763: }
764:
1.138 schwarze 765: /* --- syntax tree state data management ---------------------------------- */
766:
1.137 schwarze 767: static void
768: roff_man_free1(struct roff_man *man)
769: {
770:
1.138 schwarze 771: if (man->first != NULL)
772: roff_node_delete(man, man->first);
1.137 schwarze 773: free(man->meta.msec);
774: free(man->meta.vol);
775: free(man->meta.os);
776: free(man->meta.arch);
777: free(man->meta.title);
778: free(man->meta.name);
779: free(man->meta.date);
780: }
781:
782: static void
783: roff_man_alloc1(struct roff_man *man)
784: {
785:
786: memset(&man->meta, 0, sizeof(man->meta));
787: man->first = mandoc_calloc(1, sizeof(*man->first));
788: man->first->type = ROFFT_ROOT;
789: man->last = man->first;
790: man->last_es = NULL;
791: man->flags = 0;
792: man->macroset = MACROSET_NONE;
793: man->lastsec = man->lastnamed = SEC_NONE;
794: man->next = ROFF_NEXT_CHILD;
795: }
796:
797: void
798: roff_man_reset(struct roff_man *man)
799: {
800:
801: roff_man_free1(man);
802: roff_man_alloc1(man);
803: }
804:
805: void
806: roff_man_free(struct roff_man *man)
807: {
808:
809: roff_man_free1(man);
810: free(man);
811: }
812:
813: struct roff_man *
814: roff_man_alloc(struct roff *roff, struct mparse *parse,
815: const char *defos, int quick)
816: {
817: struct roff_man *man;
818:
819: man = mandoc_calloc(1, sizeof(*man));
820: man->parse = parse;
821: man->roff = roff;
822: man->defos = defos;
823: man->quick = quick;
824: roff_man_alloc1(man);
1.149 schwarze 825: return man;
1.1 schwarze 826: }
827:
1.138 schwarze 828: /* --- syntax tree handling ----------------------------------------------- */
829:
830: struct roff_node *
831: roff_node_alloc(struct roff_man *man, int line, int pos,
832: enum roff_type type, int tok)
833: {
834: struct roff_node *n;
835:
836: n = mandoc_calloc(1, sizeof(*n));
837: n->line = line;
838: n->pos = pos;
839: n->tok = tok;
840: n->type = type;
841: n->sec = man->lastsec;
842:
843: if (man->flags & MDOC_SYNOPSIS)
1.157 schwarze 844: n->flags |= NODE_SYNPRETTY;
1.138 schwarze 845: else
1.157 schwarze 846: n->flags &= ~NODE_SYNPRETTY;
1.138 schwarze 847: if (man->flags & MDOC_NEWLINE)
1.157 schwarze 848: n->flags |= NODE_LINE;
1.138 schwarze 849: man->flags &= ~MDOC_NEWLINE;
850:
1.149 schwarze 851: return n;
1.138 schwarze 852: }
853:
854: void
855: roff_node_append(struct roff_man *man, struct roff_node *n)
856: {
857:
858: switch (man->next) {
859: case ROFF_NEXT_SIBLING:
1.153 schwarze 860: if (man->last->next != NULL) {
861: n->next = man->last->next;
862: man->last->next->prev = n;
863: } else
864: man->last->parent->last = n;
1.138 schwarze 865: man->last->next = n;
866: n->prev = man->last;
867: n->parent = man->last->parent;
868: break;
869: case ROFF_NEXT_CHILD:
1.159 schwarze 870: if (man->last->child != NULL) {
871: n->next = man->last->child;
872: man->last->child->prev = n;
873: } else
874: man->last->last = n;
1.138 schwarze 875: man->last->child = n;
876: n->parent = man->last;
877: break;
878: default:
879: abort();
880: }
1.154 schwarze 881: man->last = n;
1.138 schwarze 882:
883: switch (n->type) {
884: case ROFFT_HEAD:
885: n->parent->head = n;
886: break;
887: case ROFFT_BODY:
1.154 schwarze 888: if (n->end != ENDBODY_NOT)
889: return;
1.138 schwarze 890: n->parent->body = n;
891: break;
892: case ROFFT_TAIL:
893: n->parent->tail = n;
894: break;
895: default:
1.154 schwarze 896: return;
1.138 schwarze 897: }
1.154 schwarze 898:
899: /*
900: * Copy over the normalised-data pointer of our parent. Not
901: * everybody has one, but copying a null pointer is fine.
902: */
903:
904: n->norm = n->parent->norm;
905: assert(n->parent->type == ROFFT_BLOCK);
1.138 schwarze 906: }
907:
1.139 schwarze 908: void
909: roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
910: {
911: struct roff_node *n;
912:
913: n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
914: n->string = roff_strdup(man->roff, word);
915: roff_node_append(man, n);
1.158 schwarze 916: n->flags |= NODE_VALID | NODE_ENDED;
1.139 schwarze 917: man->next = ROFF_NEXT_SIBLING;
918: }
919:
920: void
921: roff_word_append(struct roff_man *man, const char *word)
922: {
923: struct roff_node *n;
924: char *addstr, *newstr;
925:
926: n = man->last;
927: addstr = roff_strdup(man->roff, word);
928: mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
929: free(addstr);
930: free(n->string);
931: n->string = newstr;
932: man->next = ROFF_NEXT_SIBLING;
1.140 schwarze 933: }
934:
935: void
936: roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
937: {
938: struct roff_node *n;
939:
940: n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
941: roff_node_append(man, n);
942: man->next = ROFF_NEXT_CHILD;
943: }
944:
945: struct roff_node *
946: roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
947: {
948: struct roff_node *n;
949:
950: n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
951: roff_node_append(man, n);
952: man->next = ROFF_NEXT_CHILD;
1.149 schwarze 953: return n;
1.139 schwarze 954: }
955:
1.138 schwarze 956: struct roff_node *
957: roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
958: {
959: struct roff_node *n;
960:
961: n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
962: roff_node_append(man, n);
963: man->next = ROFF_NEXT_CHILD;
1.149 schwarze 964: return n;
1.138 schwarze 965: }
966:
967: struct roff_node *
968: roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
969: {
970: struct roff_node *n;
971:
972: n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
973: roff_node_append(man, n);
974: man->next = ROFF_NEXT_CHILD;
1.149 schwarze 975: return n;
1.139 schwarze 976: }
977:
978: void
979: roff_addeqn(struct roff_man *man, const struct eqn *eqn)
980: {
981: struct roff_node *n;
982:
983: n = roff_node_alloc(man, eqn->ln, eqn->pos, ROFFT_EQN, TOKEN_NONE);
984: n->eqn = eqn;
985: if (eqn->ln > man->last->line)
1.157 schwarze 986: n->flags |= NODE_LINE;
1.139 schwarze 987: roff_node_append(man, n);
988: man->next = ROFF_NEXT_SIBLING;
989: }
990:
991: void
992: roff_addtbl(struct roff_man *man, const struct tbl_span *tbl)
993: {
994: struct roff_node *n;
995:
996: if (man->macroset == MACROSET_MAN)
997: man_breakscope(man, TOKEN_NONE);
998: n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
999: n->span = tbl;
1000: roff_node_append(man, n);
1.158 schwarze 1001: n->flags |= NODE_VALID | NODE_ENDED;
1.139 schwarze 1002: man->next = ROFF_NEXT_SIBLING;
1.138 schwarze 1003: }
1004:
1005: void
1006: roff_node_unlink(struct roff_man *man, struct roff_node *n)
1007: {
1008:
1009: /* Adjust siblings. */
1010:
1011: if (n->prev)
1012: n->prev->next = n->next;
1013: if (n->next)
1014: n->next->prev = n->prev;
1015:
1016: /* Adjust parent. */
1017:
1018: if (n->parent != NULL) {
1019: if (n->parent->child == n)
1020: n->parent->child = n->next;
1021: if (n->parent->last == n)
1022: n->parent->last = n->prev;
1023: }
1024:
1025: /* Adjust parse point. */
1026:
1027: if (man == NULL)
1028: return;
1029: if (man->last == n) {
1030: if (n->prev == NULL) {
1031: man->last = n->parent;
1032: man->next = ROFF_NEXT_CHILD;
1033: } else {
1034: man->last = n->prev;
1035: man->next = ROFF_NEXT_SIBLING;
1036: }
1037: }
1038: if (man->first == n)
1039: man->first = NULL;
1040: }
1041:
1042: void
1043: roff_node_free(struct roff_node *n)
1044: {
1045:
1046: if (n->args != NULL)
1047: mdoc_argv_free(n->args);
1048: if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
1049: free(n->norm);
1050: free(n->string);
1051: free(n);
1052: }
1053:
1054: void
1055: roff_node_delete(struct roff_man *man, struct roff_node *n)
1056: {
1057:
1058: while (n->child != NULL)
1059: roff_node_delete(man, n->child);
1060: roff_node_unlink(man, n);
1061: roff_node_free(n);
1.141 schwarze 1062: }
1063:
1064: void
1065: deroff(char **dest, const struct roff_node *n)
1066: {
1067: char *cp;
1068: size_t sz;
1069:
1070: if (n->type != ROFFT_TEXT) {
1071: for (n = n->child; n != NULL; n = n->next)
1072: deroff(dest, n);
1073: return;
1074: }
1075:
1.160 schwarze 1076: /* Skip leading whitespace. */
1.141 schwarze 1077:
1.160 schwarze 1078: for (cp = n->string; *cp != '\0'; cp++) {
1.161 schwarze 1079: if (cp[0] == '\\' && cp[1] != '\0' &&
1080: strchr(" %&0^|~", cp[1]) != NULL)
1.141 schwarze 1081: cp++;
1.160 schwarze 1082: else if ( ! isspace((unsigned char)*cp))
1.141 schwarze 1083: break;
1084: }
1085:
1.161 schwarze 1086: /* Skip trailing backslash. */
1087:
1088: sz = strlen(cp);
1.162 schwarze 1089: if (sz > 0 && cp[sz - 1] == '\\')
1.161 schwarze 1090: sz--;
1091:
1.141 schwarze 1092: /* Skip trailing whitespace. */
1093:
1.161 schwarze 1094: for (; sz; sz--)
1.141 schwarze 1095: if ( ! isspace((unsigned char)cp[sz-1]))
1096: break;
1097:
1098: /* Skip empty strings. */
1099:
1100: if (sz == 0)
1101: return;
1102:
1103: if (*dest == NULL) {
1104: *dest = mandoc_strndup(cp, sz);
1105: return;
1106: }
1107:
1108: mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
1109: free(*dest);
1110: *dest = cp;
1.138 schwarze 1111: }
1112:
1113: /* --- main functions of the roff parser ---------------------------------- */
1114:
1.8 schwarze 1115: /*
1.79 schwarze 1116: * In the current line, expand escape sequences that tend to get
1117: * used in numerical expressions and conditional requests.
1118: * Also check the syntax of the remaining escape sequences.
1.8 schwarze 1119: */
1.45 schwarze 1120: static enum rofferr
1.110 schwarze 1121: roff_res(struct roff *r, struct buf *buf, int ln, int pos)
1.8 schwarze 1122: {
1.81 schwarze 1123: char ubuf[24]; /* buffer to print the number */
1.78 schwarze 1124: const char *start; /* start of the string to process */
1.82 schwarze 1125: char *stesc; /* start of an escape sequence ('\\') */
1.23 schwarze 1126: const char *stnam; /* start of the name, after "[(*" */
1127: const char *cp; /* end of the name, e.g. before ']' */
1128: const char *res; /* the string to be substituted */
1.110 schwarze 1129: char *nbuf; /* new buffer to copy buf->buf to */
1.53 schwarze 1130: size_t maxl; /* expected length of the escape name */
1131: size_t naml; /* actual length of the escape name */
1.109 schwarze 1132: enum mandoc_esc esc; /* type of the escape sequence */
1133: int inaml; /* length returned from mandoc_escape() */
1.53 schwarze 1134: int expand_count; /* to avoid infinite loops */
1.79 schwarze 1135: int npos; /* position in numeric expression */
1.91 schwarze 1136: int arg_complete; /* argument not interrupted by eol */
1.79 schwarze 1137: char term; /* character terminating the escape */
1.8 schwarze 1138:
1.43 schwarze 1139: expand_count = 0;
1.110 schwarze 1140: start = buf->buf + pos;
1.78 schwarze 1141: stesc = strchr(start, '\0') - 1;
1142: while (stesc-- > start) {
1.43 schwarze 1143:
1.78 schwarze 1144: /* Search backwards for the next backslash. */
1145:
1.110 schwarze 1146: if (*stesc != '\\')
1.78 schwarze 1147: continue;
1148:
1149: /* If it is escaped, skip it. */
1150:
1151: for (cp = stesc - 1; cp >= start; cp--)
1.110 schwarze 1152: if (*cp != '\\')
1.78 schwarze 1153: break;
1154:
1.110 schwarze 1155: if ((stesc - cp) % 2 == 0) {
1.82 schwarze 1156: stesc = (char *)cp;
1.78 schwarze 1157: continue;
1158: }
1.23 schwarze 1159:
1.79 schwarze 1160: /* Decide whether to expand or to check only. */
1.23 schwarze 1161:
1.79 schwarze 1162: term = '\0';
1.78 schwarze 1163: cp = stesc + 1;
1.53 schwarze 1164: switch (*cp) {
1.80 schwarze 1165: case '*':
1.53 schwarze 1166: res = NULL;
1167: break;
1.80 schwarze 1168: case 'B':
1169: case 'w':
1.79 schwarze 1170: term = cp[1];
1171: /* FALLTHROUGH */
1.80 schwarze 1172: case 'n':
1.53 schwarze 1173: res = ubuf;
1174: break;
1175: default:
1.109 schwarze 1176: esc = mandoc_escape(&cp, &stnam, &inaml);
1177: if (esc == ESCAPE_ERROR ||
1178: (esc == ESCAPE_SPECIAL &&
1.151 schwarze 1179: mchars_spec2cp(stnam, inaml) < 0))
1.92 schwarze 1180: mandoc_vmsg(MANDOCERR_ESC_BAD,
1.110 schwarze 1181: r->parse, ln, (int)(stesc - buf->buf),
1.92 schwarze 1182: "%.*s", (int)(cp - stesc), stesc);
1.78 schwarze 1183: continue;
1.42 schwarze 1184: }
1185:
1.78 schwarze 1186: if (EXPAND_LIMIT < ++expand_count) {
1187: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1.110 schwarze 1188: ln, (int)(stesc - buf->buf), NULL);
1.149 schwarze 1189: return ROFF_IGN;
1.78 schwarze 1190: }
1.23 schwarze 1191:
1192: /*
1193: * The third character decides the length
1.53 schwarze 1194: * of the name of the string or register.
1.23 schwarze 1195: * Save a pointer to the name.
1196: */
1197:
1.110 schwarze 1198: if (term == '\0') {
1.79 schwarze 1199: switch (*++cp) {
1.80 schwarze 1200: case '\0':
1.79 schwarze 1201: maxl = 0;
1202: break;
1.80 schwarze 1203: case '(':
1.79 schwarze 1204: cp++;
1205: maxl = 2;
1206: break;
1.80 schwarze 1207: case '[':
1.79 schwarze 1208: cp++;
1209: term = ']';
1210: maxl = 0;
1211: break;
1212: default:
1213: maxl = 1;
1214: break;
1215: }
1216: } else {
1217: cp += 2;
1.8 schwarze 1218: maxl = 0;
1219: }
1.23 schwarze 1220: stnam = cp;
1.8 schwarze 1221:
1.23 schwarze 1222: /* Advance to the end of the name. */
1.8 schwarze 1223:
1.125 schwarze 1224: naml = 0;
1.91 schwarze 1225: arg_complete = 1;
1.125 schwarze 1226: while (maxl == 0 || naml < maxl) {
1.110 schwarze 1227: if (*cp == '\0') {
1.92 schwarze 1228: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.110 schwarze 1229: ln, (int)(stesc - buf->buf), stesc);
1.91 schwarze 1230: arg_complete = 0;
1.79 schwarze 1231: break;
1.42 schwarze 1232: }
1.110 schwarze 1233: if (maxl == 0 && *cp == term) {
1.79 schwarze 1234: cp++;
1.125 schwarze 1235: break;
1236: }
1237: if (*cp++ != '\\' || stesc[1] != 'w') {
1238: naml++;
1239: continue;
1240: }
1241: switch (mandoc_escape(&cp, NULL, NULL)) {
1242: case ESCAPE_SPECIAL:
1243: case ESCAPE_UNICODE:
1244: case ESCAPE_NUMBERED:
1245: case ESCAPE_OVERSTRIKE:
1246: naml++;
1247: break;
1248: default:
1.8 schwarze 1249: break;
1.79 schwarze 1250: }
1.8 schwarze 1251: }
1252:
1.23 schwarze 1253: /*
1254: * Retrieve the replacement string; if it is
1255: * undefined, resume searching for escapes.
1256: */
1257:
1.79 schwarze 1258: switch (stesc[1]) {
1.80 schwarze 1259: case '*':
1.91 schwarze 1260: if (arg_complete)
1261: res = roff_getstrn(r, stnam, naml);
1.79 schwarze 1262: break;
1.80 schwarze 1263: case 'B':
1.79 schwarze 1264: npos = 0;
1.91 schwarze 1265: ubuf[0] = arg_complete &&
1.133 schwarze 1266: roff_evalnum(r, ln, stnam, &npos,
1267: NULL, ROFFNUM_SCALE) &&
1.91 schwarze 1268: stnam + npos + 1 == cp ? '1' : '0';
1.79 schwarze 1269: ubuf[1] = '\0';
1270: break;
1.80 schwarze 1271: case 'n':
1.91 schwarze 1272: if (arg_complete)
1273: (void)snprintf(ubuf, sizeof(ubuf), "%d",
1274: roff_getregn(r, stnam, naml));
1275: else
1276: ubuf[0] = '\0';
1.79 schwarze 1277: break;
1.80 schwarze 1278: case 'w':
1.91 schwarze 1279: /* use even incomplete args */
1.81 schwarze 1280: (void)snprintf(ubuf, sizeof(ubuf), "%d",
1.79 schwarze 1281: 24 * (int)naml);
1282: break;
1283: }
1.8 schwarze 1284:
1.110 schwarze 1285: if (res == NULL) {
1.92 schwarze 1286: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.110 schwarze 1287: r->parse, ln, (int)(stesc - buf->buf),
1.92 schwarze 1288: "%.*s", (int)naml, stnam);
1.37 schwarze 1289: res = "";
1.118 schwarze 1290: } else if (buf->sz + strlen(res) > SHRT_MAX) {
1291: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
1292: ln, (int)(stesc - buf->buf), NULL);
1.149 schwarze 1293: return ROFF_IGN;
1.8 schwarze 1294: }
1295:
1.23 schwarze 1296: /* Replace the escape sequence by the string. */
1297:
1.82 schwarze 1298: *stesc = '\0';
1.110 schwarze 1299: buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
1300: buf->buf, res, cp) + 1;
1.8 schwarze 1301:
1.78 schwarze 1302: /* Prepare for the next replacement. */
1.8 schwarze 1303:
1.78 schwarze 1304: start = nbuf + pos;
1.110 schwarze 1305: stesc = nbuf + (stesc - buf->buf) + strlen(res);
1306: free(buf->buf);
1307: buf->buf = nbuf;
1.42 schwarze 1308: }
1.149 schwarze 1309: return ROFF_CONT;
1.42 schwarze 1310: }
1311:
1312: /*
1.147 schwarze 1313: * Process text streams.
1.42 schwarze 1314: */
1315: static enum rofferr
1.110 schwarze 1316: roff_parsetext(struct buf *buf, int pos, int *offs)
1.42 schwarze 1317: {
1318: size_t sz;
1319: const char *start;
1.51 schwarze 1320: char *p;
1321: int isz;
1.42 schwarze 1322: enum mandoc_esc esc;
1323:
1.147 schwarze 1324: /* Spring the input line trap. */
1325:
1326: if (roffit_lines == 1) {
1327: isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
1328: free(buf->buf);
1329: buf->buf = p;
1330: buf->sz = isz + 1;
1331: *offs = 0;
1332: free(roffit_macro);
1333: roffit_lines = 0;
1.149 schwarze 1334: return ROFF_REPARSE;
1.147 schwarze 1335: } else if (roffit_lines > 1)
1336: --roffit_lines;
1337:
1338: /* Convert all breakable hyphens into ASCII_HYPH. */
1339:
1.110 schwarze 1340: start = p = buf->buf + pos;
1.42 schwarze 1341:
1.110 schwarze 1342: while (*p != '\0') {
1.42 schwarze 1343: sz = strcspn(p, "-\\");
1344: p += sz;
1345:
1.110 schwarze 1346: if (*p == '\0')
1.42 schwarze 1347: break;
1348:
1.110 schwarze 1349: if (*p == '\\') {
1.42 schwarze 1350: /* Skip over escapes. */
1351: p++;
1.62 schwarze 1352: esc = mandoc_escape((const char **)&p, NULL, NULL);
1.110 schwarze 1353: if (esc == ESCAPE_ERROR)
1.42 schwarze 1354: break;
1.136 schwarze 1355: while (*p == '-')
1356: p++;
1.42 schwarze 1357: continue;
1358: } else if (p == start) {
1359: p++;
1360: continue;
1361: }
1362:
1.44 schwarze 1363: if (isalpha((unsigned char)p[-1]) &&
1364: isalpha((unsigned char)p[1]))
1.42 schwarze 1365: *p = ASCII_HYPH;
1366: p++;
1.8 schwarze 1367: }
1.149 schwarze 1368: return ROFF_CONT;
1.8 schwarze 1369: }
1370:
1.1 schwarze 1371: enum rofferr
1.110 schwarze 1372: roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
1.1 schwarze 1373: {
1.166 schwarze 1374: enum roff_tok t;
1.27 schwarze 1375: enum rofferr e;
1.110 schwarze 1376: int pos; /* parse point */
1.115 schwarze 1377: int spos; /* saved parse point for messages */
1.110 schwarze 1378: int ppos; /* original offset in buf->buf */
1379: int ctl; /* macro line (boolean) */
1380:
1381: ppos = pos = *offs;
1.1 schwarze 1382:
1.102 schwarze 1383: /* Handle in-line equation delimiters. */
1384:
1.108 schwarze 1385: if (r->tbl == NULL &&
1386: r->last_eqn != NULL && r->last_eqn->delim &&
1.102 schwarze 1387: (r->eqn == NULL || r->eqn_inline)) {
1.110 schwarze 1388: e = roff_eqndelim(r, buf, pos);
1.102 schwarze 1389: if (e == ROFF_REPARSE)
1.149 schwarze 1390: return e;
1.102 schwarze 1391: assert(e == ROFF_CONT);
1392: }
1393:
1394: /* Expand some escape sequences. */
1.8 schwarze 1395:
1.110 schwarze 1396: e = roff_res(r, buf, ln, pos);
1397: if (e == ROFF_IGN)
1.149 schwarze 1398: return e;
1.110 schwarze 1399: assert(e == ROFF_CONT);
1.8 schwarze 1400:
1.110 schwarze 1401: ctl = roff_getcontrol(r, buf->buf, &pos);
1.35 schwarze 1402:
1.8 schwarze 1403: /*
1.2 schwarze 1404: * First, if a scope is open and we're not a macro, pass the
1.124 schwarze 1405: * text through the macro's filter.
1406: * Equations process all content themselves.
1407: * Tables process almost all content themselves, but we want
1408: * to warn about macros before passing it there.
1.2 schwarze 1409: */
1410:
1.124 schwarze 1411: if (r->last != NULL && ! ctl) {
1.2 schwarze 1412: t = r->last->tok;
1.110 schwarze 1413: e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
1.166 schwarze 1414: if (e == ROFF_IGN)
1.149 schwarze 1415: return e;
1.166 schwarze 1416: assert(e == ROFF_CONT);
1.54 schwarze 1417: }
1.124 schwarze 1418: if (r->eqn != NULL)
1.149 schwarze 1419: return eqn_read(&r->eqn, ln, buf->buf, ppos, offs);
1.124 schwarze 1420: if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
1.149 schwarze 1421: return tbl_read(r->tbl, ln, buf->buf, ppos);
1.124 schwarze 1422: if ( ! ctl)
1.149 schwarze 1423: return roff_parsetext(buf, pos, offs);
1.100 schwarze 1424:
1425: /* Skip empty request lines. */
1426:
1.110 schwarze 1427: if (buf->buf[pos] == '"') {
1.100 schwarze 1428: mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
1429: ln, pos, NULL);
1.149 schwarze 1430: return ROFF_IGN;
1.110 schwarze 1431: } else if (buf->buf[pos] == '\0')
1.149 schwarze 1432: return ROFF_IGN;
1.2 schwarze 1433:
1434: /*
1435: * If a scope is open, go to the child handler for that macro,
1436: * as it may want to preprocess before doing anything with it.
1.32 schwarze 1437: * Don't do so if an equation is open.
1.2 schwarze 1438: */
1439:
1440: if (r->last) {
1.1 schwarze 1441: t = r->last->tok;
1.149 schwarze 1442: return (*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs);
1.2 schwarze 1443: }
1444:
1.115 schwarze 1445: /* No scope is open. This is a new request or macro. */
1446:
1447: spos = pos;
1448: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1449:
1450: /* Tables ignore most macros. */
1451:
1.166 schwarze 1452: if (r->tbl != NULL && (t == TOKEN_NONE || t == ROFF_TS)) {
1.115 schwarze 1453: mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
1454: ln, pos, buf->buf + spos);
1.129 schwarze 1455: if (t == ROFF_TS)
1.149 schwarze 1456: return ROFF_IGN;
1.129 schwarze 1457: while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
1458: pos++;
1.163 schwarze 1459: while (buf->buf[pos] == ' ')
1.129 schwarze 1460: pos++;
1.149 schwarze 1461: return tbl_read(r->tbl, ln, buf->buf, pos);
1.115 schwarze 1462: }
1463:
1.2 schwarze 1464: /*
1.115 schwarze 1465: * This is neither a roff request nor a user-defined macro.
1466: * Let the standard macro set parsers handle it.
1.2 schwarze 1467: */
1468:
1.166 schwarze 1469: if (t == TOKEN_NONE)
1.149 schwarze 1470: return ROFF_CONT;
1.115 schwarze 1471:
1472: /* Execute a roff request or a user defined macro. */
1.1 schwarze 1473:
1.149 schwarze 1474: return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.2 schwarze 1475: }
1476:
1.27 schwarze 1477: void
1.2 schwarze 1478: roff_endparse(struct roff *r)
1479: {
1.1 schwarze 1480:
1.27 schwarze 1481: if (r->last)
1.94 schwarze 1482: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1483: r->last->line, r->last->col,
1.167 ! schwarze 1484: roff_name[r->last->tok]);
1.27 schwarze 1485:
1.32 schwarze 1486: if (r->eqn) {
1.94 schwarze 1487: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1488: r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
1.41 schwarze 1489: eqn_end(&r->eqn);
1.32 schwarze 1490: }
1491:
1.27 schwarze 1492: if (r->tbl) {
1.94 schwarze 1493: mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
1494: r->tbl->line, r->tbl->pos, "TS");
1.41 schwarze 1495: tbl_end(&r->tbl);
1.27 schwarze 1496: }
1.1 schwarze 1497: }
1498:
1499: /*
1500: * Parse a roff node's type from the input buffer. This must be in the
1501: * form of ".foo xxx" in the usual way.
1502: */
1.166 schwarze 1503: static enum roff_tok
1.87 schwarze 1504: roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
1.1 schwarze 1505: {
1.87 schwarze 1506: char *cp;
1.16 schwarze 1507: const char *mac;
1508: size_t maclen;
1.166 schwarze 1509: enum roff_tok t;
1.1 schwarze 1510:
1.87 schwarze 1511: cp = buf + *pos;
1512:
1513: if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
1.166 schwarze 1514: return TOKEN_NONE;
1.1 schwarze 1515:
1.87 schwarze 1516: mac = cp;
1517: maclen = roff_getname(r, &cp, ln, ppos);
1.1 schwarze 1518:
1.16 schwarze 1519: t = (r->current_string = roff_getstrn(r, mac, maclen))
1.167 ! schwarze 1520: ? ROFF_USERDEF : roffhash_find(r->reqtab, mac, maclen);
1.1 schwarze 1521:
1.166 schwarze 1522: if (t != TOKEN_NONE)
1.87 schwarze 1523: *pos = cp - buf;
1.1 schwarze 1524:
1.149 schwarze 1525: return t;
1.1 schwarze 1526: }
1527:
1.138 schwarze 1528: /* --- handling of request blocks ----------------------------------------- */
1529:
1.1 schwarze 1530: static enum rofferr
1.2 schwarze 1531: roff_cblock(ROFF_ARGS)
1.1 schwarze 1532: {
1533:
1.2 schwarze 1534: /*
1535: * A block-close `..' should only be invoked as a child of an
1536: * ignore macro, otherwise raise a warning and just ignore it.
1537: */
1538:
1.110 schwarze 1539: if (r->last == NULL) {
1.94 schwarze 1540: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1541: ln, ppos, "..");
1.149 schwarze 1542: return ROFF_IGN;
1.2 schwarze 1543: }
1.1 schwarze 1544:
1.2 schwarze 1545: switch (r->last->tok) {
1.80 schwarze 1546: case ROFF_am:
1.93 schwarze 1547: /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
1.80 schwarze 1548: case ROFF_ami:
1549: case ROFF_de:
1.23 schwarze 1550: /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
1.80 schwarze 1551: case ROFF_dei:
1552: case ROFF_ig:
1.2 schwarze 1553: break;
1554: default:
1.94 schwarze 1555: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1556: ln, ppos, "..");
1.149 schwarze 1557: return ROFF_IGN;
1.2 schwarze 1558: }
1559:
1.110 schwarze 1560: if (buf->buf[pos] != '\0')
1.90 schwarze 1561: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.110 schwarze 1562: ".. %s", buf->buf + pos);
1.2 schwarze 1563:
1564: roffnode_pop(r);
1565: roffnode_cleanscope(r);
1.149 schwarze 1566: return ROFF_IGN;
1.2 schwarze 1567:
1568: }
1.1 schwarze 1569:
1.2 schwarze 1570: static void
1571: roffnode_cleanscope(struct roff *r)
1572: {
1.1 schwarze 1573:
1.2 schwarze 1574: while (r->last) {
1.46 schwarze 1575: if (--r->last->endspan != 0)
1.2 schwarze 1576: break;
1577: roffnode_pop(r);
1578: }
1579: }
1.1 schwarze 1580:
1.68 schwarze 1581: static void
1582: roff_ccond(struct roff *r, int ln, int ppos)
1.2 schwarze 1583: {
1.1 schwarze 1584:
1.2 schwarze 1585: if (NULL == r->last) {
1.94 schwarze 1586: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1587: ln, ppos, "\\}");
1.68 schwarze 1588: return;
1.2 schwarze 1589: }
1.1 schwarze 1590:
1.2 schwarze 1591: switch (r->last->tok) {
1.80 schwarze 1592: case ROFF_el:
1593: case ROFF_ie:
1594: case ROFF_if:
1.2 schwarze 1595: break;
1596: default:
1.94 schwarze 1597: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1598: ln, ppos, "\\}");
1.68 schwarze 1599: return;
1.2 schwarze 1600: }
1.1 schwarze 1601:
1.2 schwarze 1602: if (r->last->endspan > -1) {
1.94 schwarze 1603: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
1604: ln, ppos, "\\}");
1.68 schwarze 1605: return;
1.2 schwarze 1606: }
1607:
1608: roffnode_pop(r);
1609: roffnode_cleanscope(r);
1.68 schwarze 1610: return;
1.1 schwarze 1611: }
1612:
1613: static enum rofferr
1.2 schwarze 1614: roff_block(ROFF_ARGS)
1.1 schwarze 1615: {
1.93 schwarze 1616: const char *name;
1617: char *iname, *cp;
1.86 schwarze 1618: size_t namesz;
1.16 schwarze 1619:
1.93 schwarze 1620: /* Ignore groff compatibility mode for now. */
1.2 schwarze 1621:
1.110 schwarze 1622: if (tok == ROFF_de1)
1.93 schwarze 1623: tok = ROFF_de;
1.123 schwarze 1624: else if (tok == ROFF_dei1)
1625: tok = ROFF_dei;
1.110 schwarze 1626: else if (tok == ROFF_am1)
1.93 schwarze 1627: tok = ROFF_am;
1.123 schwarze 1628: else if (tok == ROFF_ami1)
1629: tok = ROFF_ami;
1.93 schwarze 1630:
1631: /* Parse the macro name argument. */
1632:
1.110 schwarze 1633: cp = buf->buf + pos;
1634: if (tok == ROFF_ig) {
1.93 schwarze 1635: iname = NULL;
1636: namesz = 0;
1637: } else {
1638: iname = cp;
1639: namesz = roff_getname(r, &cp, ln, ppos);
1640: iname[namesz] = '\0';
1641: }
1.22 schwarze 1642:
1.93 schwarze 1643: /* Resolve the macro name argument if it is indirect. */
1.22 schwarze 1644:
1.110 schwarze 1645: if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1646: if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.93 schwarze 1647: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.110 schwarze 1648: r->parse, ln, (int)(iname - buf->buf),
1.93 schwarze 1649: "%.*s", (int)namesz, iname);
1650: namesz = 0;
1651: } else
1652: namesz = strlen(name);
1653: } else
1654: name = iname;
1.22 schwarze 1655:
1.110 schwarze 1656: if (namesz == 0 && tok != ROFF_ig) {
1.93 schwarze 1657: mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
1.167 ! schwarze 1658: ln, ppos, roff_name[tok]);
1.149 schwarze 1659: return ROFF_IGN;
1.93 schwarze 1660: }
1.2 schwarze 1661:
1.16 schwarze 1662: roffnode_push(r, tok, name, ln, ppos);
1663:
1664: /*
1665: * At the beginning of a `de' macro, clear the existing string
1666: * with the same name, if there is one. New content will be
1.66 schwarze 1667: * appended from roff_block_text() in multiline mode.
1.16 schwarze 1668: */
1.22 schwarze 1669:
1.110 schwarze 1670: if (tok == ROFF_de || tok == ROFF_dei)
1.86 schwarze 1671: roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
1.2 schwarze 1672:
1.110 schwarze 1673: if (*cp == '\0')
1.149 schwarze 1674: return ROFF_IGN;
1.1 schwarze 1675:
1.93 schwarze 1676: /* Get the custom end marker. */
1.22 schwarze 1677:
1.93 schwarze 1678: iname = cp;
1.86 schwarze 1679: namesz = roff_getname(r, &cp, ln, ppos);
1.93 schwarze 1680:
1681: /* Resolve the end marker if it is indirect. */
1682:
1.110 schwarze 1683: if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
1684: if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
1.93 schwarze 1685: mandoc_vmsg(MANDOCERR_STR_UNDEF,
1.110 schwarze 1686: r->parse, ln, (int)(iname - buf->buf),
1.93 schwarze 1687: "%.*s", (int)namesz, iname);
1688: namesz = 0;
1689: } else
1690: namesz = strlen(name);
1691: } else
1692: name = iname;
1693:
1.86 schwarze 1694: if (namesz)
1695: r->last->end = mandoc_strndup(name, namesz);
1.2 schwarze 1696:
1.110 schwarze 1697: if (*cp != '\0')
1.90 schwarze 1698: mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
1.167 ! schwarze 1699: ln, pos, ".%s ... %s", roff_name[tok], cp);
1.1 schwarze 1700:
1.149 schwarze 1701: return ROFF_IGN;
1.1 schwarze 1702: }
1703:
1704: static enum rofferr
1.2 schwarze 1705: roff_block_sub(ROFF_ARGS)
1.1 schwarze 1706: {
1.166 schwarze 1707: enum roff_tok t;
1.2 schwarze 1708: int i, j;
1709:
1710: /*
1711: * First check whether a custom macro exists at this level. If
1712: * it does, then check against it. This is some of groff's
1713: * stranger behaviours. If we encountered a custom end-scope
1714: * tag and that tag also happens to be a "real" macro, then we
1715: * need to try interpreting it again as a real macro. If it's
1716: * not, then return ignore. Else continue.
1717: */
1718:
1719: if (r->last->end) {
1.35 schwarze 1720: for (i = pos, j = 0; r->last->end[j]; j++, i++)
1.110 schwarze 1721: if (buf->buf[i] != r->last->end[j])
1.2 schwarze 1722: break;
1.1 schwarze 1723:
1.110 schwarze 1724: if (r->last->end[j] == '\0' &&
1725: (buf->buf[i] == '\0' ||
1726: buf->buf[i] == ' ' ||
1727: buf->buf[i] == '\t')) {
1.2 schwarze 1728: roffnode_pop(r);
1729: roffnode_cleanscope(r);
1.1 schwarze 1730:
1.110 schwarze 1731: while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
1.35 schwarze 1732: i++;
1733:
1734: pos = i;
1.110 schwarze 1735: if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
1.166 schwarze 1736: TOKEN_NONE)
1.149 schwarze 1737: return ROFF_RERUN;
1738: return ROFF_IGN;
1.2 schwarze 1739: }
1.1 schwarze 1740: }
1741:
1.2 schwarze 1742: /*
1743: * If we have no custom end-query or lookup failed, then try
1744: * pulling it out of the hashtable.
1745: */
1.1 schwarze 1746:
1.110 schwarze 1747: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.1 schwarze 1748:
1.110 schwarze 1749: if (t != ROFF_cblock) {
1750: if (tok != ROFF_ig)
1751: roff_setstr(r, r->last->name, buf->buf + ppos, 2);
1.149 schwarze 1752: return ROFF_IGN;
1.16 schwarze 1753: }
1.1 schwarze 1754:
1.149 schwarze 1755: return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.2 schwarze 1756: }
1757:
1758: static enum rofferr
1759: roff_block_text(ROFF_ARGS)
1760: {
1761:
1.110 schwarze 1762: if (tok != ROFF_ig)
1763: roff_setstr(r, r->last->name, buf->buf + pos, 2);
1.16 schwarze 1764:
1.149 schwarze 1765: return ROFF_IGN;
1.2 schwarze 1766: }
1767:
1768: static enum rofferr
1769: roff_cond_sub(ROFF_ARGS)
1770: {
1.166 schwarze 1771: enum roff_tok t;
1.37 schwarze 1772: char *ep;
1.71 schwarze 1773: int rr;
1.2 schwarze 1774:
1775: rr = r->last->rule;
1.37 schwarze 1776: roffnode_cleanscope(r);
1.110 schwarze 1777: t = roff_parse(r, buf->buf, &pos, ln, ppos);
1.2 schwarze 1778:
1.37 schwarze 1779: /*
1.50 schwarze 1780: * Fully handle known macros when they are structurally
1781: * required or when the conditional evaluated to true.
1.5 schwarze 1782: */
1783:
1.166 schwarze 1784: if (t != TOKEN_NONE && (rr || roffs[t].flags & ROFFMAC_STRUCT))
1.149 schwarze 1785: return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
1.39 schwarze 1786:
1.69 schwarze 1787: /*
1788: * If `\}' occurs on a macro line without a preceding macro,
1789: * drop the line completely.
1790: */
1791:
1.110 schwarze 1792: ep = buf->buf + pos;
1793: if (ep[0] == '\\' && ep[1] == '}')
1.71 schwarze 1794: rr = 0;
1.69 schwarze 1795:
1.50 schwarze 1796: /* Always check for the closing delimiter `\}'. */
1.39 schwarze 1797:
1.110 schwarze 1798: while ((ep = strchr(ep, '\\')) != NULL) {
1799: if (*(++ep) == '}') {
1.70 schwarze 1800: *ep = '&';
1.110 schwarze 1801: roff_ccond(r, ln, ep - buf->buf - 1);
1.70 schwarze 1802: }
1.119 schwarze 1803: if (*ep != '\0')
1804: ++ep;
1.50 schwarze 1805: }
1.149 schwarze 1806: return rr ? ROFF_CONT : ROFF_IGN;
1.2 schwarze 1807: }
1808:
1809: static enum rofferr
1810: roff_cond_text(ROFF_ARGS)
1811: {
1.37 schwarze 1812: char *ep;
1.71 schwarze 1813: int rr;
1.2 schwarze 1814:
1815: rr = r->last->rule;
1.37 schwarze 1816: roffnode_cleanscope(r);
1.1 schwarze 1817:
1.110 schwarze 1818: ep = buf->buf + pos;
1819: while ((ep = strchr(ep, '\\')) != NULL) {
1820: if (*(++ep) == '}') {
1.70 schwarze 1821: *ep = '&';
1.110 schwarze 1822: roff_ccond(r, ln, ep - buf->buf - 1);
1.70 schwarze 1823: }
1.119 schwarze 1824: if (*ep != '\0')
1825: ++ep;
1.2 schwarze 1826: }
1.149 schwarze 1827: return rr ? ROFF_CONT : ROFF_IGN;
1.2 schwarze 1828: }
1829:
1.138 schwarze 1830: /* --- handling of numeric and conditional expressions -------------------- */
1831:
1.77 schwarze 1832: /*
1833: * Parse a single signed integer number. Stop at the first non-digit.
1834: * If there is at least one digit, return success and advance the
1835: * parse point, else return failure and let the parse point unchanged.
1836: * Ignore overflows, treat them just like the C language.
1837: */
1.56 schwarze 1838: static int
1.133 schwarze 1839: roff_getnum(const char *v, int *pos, int *res, int flags)
1.56 schwarze 1840: {
1.133 schwarze 1841: int myres, scaled, n, p;
1.79 schwarze 1842:
1843: if (NULL == res)
1844: res = &myres;
1.56 schwarze 1845:
1846: p = *pos;
1847: n = v[p] == '-';
1.133 schwarze 1848: if (n || v[p] == '+')
1.56 schwarze 1849: p++;
1850:
1.133 schwarze 1851: if (flags & ROFFNUM_WHITE)
1852: while (isspace((unsigned char)v[p]))
1853: p++;
1854:
1.56 schwarze 1855: for (*res = 0; isdigit((unsigned char)v[p]); p++)
1.77 schwarze 1856: *res = 10 * *res + v[p] - '0';
1.56 schwarze 1857: if (p == *pos + n)
1858: return 0;
1859:
1860: if (n)
1861: *res = -*res;
1862:
1.126 schwarze 1863: /* Each number may be followed by one optional scaling unit. */
1864:
1865: switch (v[p]) {
1866: case 'f':
1.133 schwarze 1867: scaled = *res * 65536;
1.126 schwarze 1868: break;
1869: case 'i':
1.133 schwarze 1870: scaled = *res * 240;
1.126 schwarze 1871: break;
1872: case 'c':
1.133 schwarze 1873: scaled = *res * 240 / 2.54;
1.126 schwarze 1874: break;
1875: case 'v':
1876: case 'P':
1.133 schwarze 1877: scaled = *res * 40;
1.126 schwarze 1878: break;
1879: case 'm':
1880: case 'n':
1.133 schwarze 1881: scaled = *res * 24;
1.126 schwarze 1882: break;
1883: case 'p':
1.133 schwarze 1884: scaled = *res * 10 / 3;
1.126 schwarze 1885: break;
1886: case 'u':
1.133 schwarze 1887: scaled = *res;
1.126 schwarze 1888: break;
1889: case 'M':
1.133 schwarze 1890: scaled = *res * 6 / 25;
1.126 schwarze 1891: break;
1892: default:
1.133 schwarze 1893: scaled = *res;
1.126 schwarze 1894: p--;
1895: break;
1896: }
1.133 schwarze 1897: if (flags & ROFFNUM_SCALE)
1898: *res = scaled;
1.126 schwarze 1899:
1900: *pos = p + 1;
1.149 schwarze 1901: return 1;
1.56 schwarze 1902: }
1903:
1.71 schwarze 1904: /*
1905: * Evaluate a string comparison condition.
1906: * The first character is the delimiter.
1907: * Succeed if the string up to its second occurrence
1908: * matches the string up to its third occurence.
1909: * Advance the cursor after the third occurrence
1910: * or lacking that, to the end of the line.
1911: */
1912: static int
1913: roff_evalstrcond(const char *v, int *pos)
1914: {
1915: const char *s1, *s2, *s3;
1916: int match;
1917:
1918: match = 0;
1919: s1 = v + *pos; /* initial delimiter */
1920: s2 = s1 + 1; /* for scanning the first string */
1921: s3 = strchr(s2, *s1); /* for scanning the second string */
1922:
1923: if (NULL == s3) /* found no middle delimiter */
1924: goto out;
1925:
1926: while ('\0' != *++s3) {
1927: if (*s2 != *s3) { /* mismatch */
1928: s3 = strchr(s3, *s1);
1929: break;
1930: }
1931: if (*s3 == *s1) { /* found the final delimiter */
1932: match = 1;
1933: break;
1934: }
1935: s2++;
1936: }
1937:
1938: out:
1939: if (NULL == s3)
1940: s3 = strchr(s2, '\0');
1.114 schwarze 1941: else if (*s3 != '\0')
1.71 schwarze 1942: s3++;
1943: *pos = s3 - v;
1.149 schwarze 1944: return match;
1.71 schwarze 1945: }
1946:
1.77 schwarze 1947: /*
1948: * Evaluate an optionally negated single character, numerical,
1949: * or string condition.
1950: */
1.71 schwarze 1951: static int
1.143 schwarze 1952: roff_evalcond(struct roff *r, int ln, char *v, int *pos)
1.5 schwarze 1953: {
1.143 schwarze 1954: char *cp, *name;
1955: size_t sz;
1.113 schwarze 1956: int number, savepos, wanttrue;
1.5 schwarze 1957:
1.71 schwarze 1958: if ('!' == v[*pos]) {
1959: wanttrue = 0;
1960: (*pos)++;
1961: } else
1962: wanttrue = 1;
1963:
1.5 schwarze 1964: switch (v[*pos]) {
1.112 schwarze 1965: case '\0':
1.149 schwarze 1966: return 0;
1.80 schwarze 1967: case 'n':
1968: case 'o':
1.5 schwarze 1969: (*pos)++;
1.149 schwarze 1970: return wanttrue;
1.80 schwarze 1971: case 'c':
1972: case 'd':
1973: case 'e':
1974: case 't':
1.111 schwarze 1975: case 'v':
1.5 schwarze 1976: (*pos)++;
1.149 schwarze 1977: return !wanttrue;
1.143 schwarze 1978: case 'r':
1979: cp = name = v + ++*pos;
1980: sz = roff_getname(r, &cp, ln, *pos);
1981: *pos = cp - v;
1.149 schwarze 1982: return (sz && roff_hasregn(r, name, sz)) == wanttrue;
1.5 schwarze 1983: default:
1984: break;
1985: }
1986:
1.113 schwarze 1987: savepos = *pos;
1.133 schwarze 1988: if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
1.149 schwarze 1989: return (number > 0) == wanttrue;
1.113 schwarze 1990: else if (*pos == savepos)
1.149 schwarze 1991: return roff_evalstrcond(v, pos) == wanttrue;
1.77 schwarze 1992: else
1.149 schwarze 1993: return 0;
1.5 schwarze 1994: }
1995:
1.2 schwarze 1996: static enum rofferr
1.21 schwarze 1997: roff_line_ignore(ROFF_ARGS)
1.6 schwarze 1998: {
1.30 schwarze 1999:
1.149 schwarze 2000: return ROFF_IGN;
1.21 schwarze 2001: }
2002:
2003: static enum rofferr
1.123 schwarze 2004: roff_insec(ROFF_ARGS)
2005: {
2006:
2007: mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
1.167 ! schwarze 2008: ln, ppos, roff_name[tok]);
1.149 schwarze 2009: return ROFF_IGN;
1.123 schwarze 2010: }
2011:
2012: static enum rofferr
2013: roff_unsupp(ROFF_ARGS)
2014: {
2015:
2016: mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
1.167 ! schwarze 2017: ln, ppos, roff_name[tok]);
1.149 schwarze 2018: return ROFF_IGN;
1.123 schwarze 2019: }
2020:
2021: static enum rofferr
1.2 schwarze 2022: roff_cond(ROFF_ARGS)
2023: {
1.46 schwarze 2024:
2025: roffnode_push(r, tok, NULL, ln, ppos);
1.2 schwarze 2026:
1.80 schwarze 2027: /*
1.35 schwarze 2028: * An `.el' has no conditional body: it will consume the value
2029: * of the current rstack entry set in prior `ie' calls or
1.80 schwarze 2030: * defaults to DENY.
1.35 schwarze 2031: *
2032: * If we're not an `el', however, then evaluate the conditional.
2033: */
1.1 schwarze 2034:
1.110 schwarze 2035: r->last->rule = tok == ROFF_el ?
1.80 schwarze 2036: (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
1.110 schwarze 2037: roff_evalcond(r, ln, buf->buf, &pos);
1.2 schwarze 2038:
1.35 schwarze 2039: /*
2040: * An if-else will put the NEGATION of the current evaluated
2041: * conditional into the stack of rules.
2042: */
2043:
1.110 schwarze 2044: if (tok == ROFF_ie) {
1.96 schwarze 2045: if (r->rstackpos + 1 == r->rstacksz) {
2046: r->rstacksz += 16;
2047: r->rstack = mandoc_reallocarray(r->rstack,
2048: r->rstacksz, sizeof(int));
1.35 schwarze 2049: }
1.71 schwarze 2050: r->rstack[++r->rstackpos] = !r->last->rule;
1.2 schwarze 2051: }
1.5 schwarze 2052:
2053: /* If the parent has false as its rule, then so do we. */
2054:
1.71 schwarze 2055: if (r->last->parent && !r->last->parent->rule)
2056: r->last->rule = 0;
1.5 schwarze 2057:
2058: /*
1.46 schwarze 2059: * Determine scope.
2060: * If there is nothing on the line after the conditional,
2061: * not even whitespace, use next-line scope.
1.5 schwarze 2062: */
1.2 schwarze 2063:
1.110 schwarze 2064: if (buf->buf[pos] == '\0') {
1.46 schwarze 2065: r->last->endspan = 2;
2066: goto out;
2067: }
2068:
1.110 schwarze 2069: while (buf->buf[pos] == ' ')
1.46 schwarze 2070: pos++;
2071:
2072: /* An opening brace requests multiline scope. */
1.2 schwarze 2073:
1.110 schwarze 2074: if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
1.2 schwarze 2075: r->last->endspan = -1;
2076: pos += 2;
1.144 schwarze 2077: while (buf->buf[pos] == ' ')
2078: pos++;
1.46 schwarze 2079: goto out;
1.80 schwarze 2080: }
1.2 schwarze 2081:
2082: /*
1.46 schwarze 2083: * Anything else following the conditional causes
2084: * single-line scope. Warn if the scope contains
2085: * nothing but trailing whitespace.
1.2 schwarze 2086: */
2087:
1.110 schwarze 2088: if (buf->buf[pos] == '\0')
1.89 schwarze 2089: mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
1.167 ! schwarze 2090: ln, ppos, roff_name[tok]);
1.2 schwarze 2091:
1.46 schwarze 2092: r->last->endspan = 1;
1.1 schwarze 2093:
1.46 schwarze 2094: out:
1.2 schwarze 2095: *offs = pos;
1.149 schwarze 2096: return ROFF_RERUN;
1.1 schwarze 2097: }
2098:
1.2 schwarze 2099: static enum rofferr
1.7 schwarze 2100: roff_ds(ROFF_ARGS)
2101: {
1.85 schwarze 2102: char *string;
2103: const char *name;
2104: size_t namesz;
1.10 schwarze 2105:
1.123 schwarze 2106: /* Ignore groff compatibility mode for now. */
2107:
2108: if (tok == ROFF_ds1)
2109: tok = ROFF_ds;
2110: else if (tok == ROFF_as1)
2111: tok = ROFF_as;
2112:
1.10 schwarze 2113: /*
1.85 schwarze 2114: * The first word is the name of the string.
2115: * If it is empty or terminated by an escape sequence,
2116: * abort the `ds' request without defining anything.
1.10 schwarze 2117: */
1.7 schwarze 2118:
1.110 schwarze 2119: name = string = buf->buf + pos;
2120: if (*name == '\0')
1.149 schwarze 2121: return ROFF_IGN;
1.7 schwarze 2122:
1.85 schwarze 2123: namesz = roff_getname(r, &string, ln, pos);
1.110 schwarze 2124: if (name[namesz] == '\\')
1.149 schwarze 2125: return ROFF_IGN;
1.85 schwarze 2126:
2127: /* Read past the initial double-quote, if any. */
1.110 schwarze 2128: if (*string == '"')
1.7 schwarze 2129: string++;
2130:
1.10 schwarze 2131: /* The rest is the value. */
1.85 schwarze 2132: roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
2133: ROFF_as == tok);
1.149 schwarze 2134: return ROFF_IGN;
1.7 schwarze 2135: }
2136:
1.77 schwarze 2137: /*
2138: * Parse a single operator, one or two characters long.
2139: * If the operator is recognized, return success and advance the
2140: * parse point, else return failure and let the parse point unchanged.
2141: */
2142: static int
2143: roff_getop(const char *v, int *pos, char *res)
2144: {
2145:
2146: *res = v[*pos];
2147:
2148: switch (*res) {
1.80 schwarze 2149: case '+':
2150: case '-':
2151: case '*':
2152: case '/':
2153: case '%':
2154: case '&':
2155: case ':':
1.77 schwarze 2156: break;
2157: case '<':
2158: switch (v[*pos + 1]) {
1.80 schwarze 2159: case '=':
1.77 schwarze 2160: *res = 'l';
2161: (*pos)++;
2162: break;
1.80 schwarze 2163: case '>':
1.77 schwarze 2164: *res = '!';
2165: (*pos)++;
2166: break;
1.80 schwarze 2167: case '?':
1.77 schwarze 2168: *res = 'i';
2169: (*pos)++;
2170: break;
2171: default:
2172: break;
2173: }
2174: break;
2175: case '>':
2176: switch (v[*pos + 1]) {
1.80 schwarze 2177: case '=':
1.77 schwarze 2178: *res = 'g';
2179: (*pos)++;
2180: break;
1.80 schwarze 2181: case '?':
1.77 schwarze 2182: *res = 'a';
2183: (*pos)++;
2184: break;
2185: default:
2186: break;
2187: }
2188: break;
2189: case '=':
2190: if ('=' == v[*pos + 1])
2191: (*pos)++;
2192: break;
2193: default:
1.149 schwarze 2194: return 0;
1.77 schwarze 2195: }
2196: (*pos)++;
2197:
1.149 schwarze 2198: return *res;
1.77 schwarze 2199: }
2200:
2201: /*
2202: * Evaluate either a parenthesized numeric expression
2203: * or a single signed integer number.
2204: */
2205: static int
1.106 schwarze 2206: roff_evalpar(struct roff *r, int ln,
1.133 schwarze 2207: const char *v, int *pos, int *res, int flags)
1.77 schwarze 2208: {
2209:
2210: if ('(' != v[*pos])
1.149 schwarze 2211: return roff_getnum(v, pos, res, flags);
1.77 schwarze 2212:
2213: (*pos)++;
1.133 schwarze 2214: if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
1.149 schwarze 2215: return 0;
1.77 schwarze 2216:
1.79 schwarze 2217: /*
2218: * Omission of the closing parenthesis
2219: * is an error in validation mode,
2220: * but ignored in evaluation mode.
2221: */
2222:
1.77 schwarze 2223: if (')' == v[*pos])
2224: (*pos)++;
1.79 schwarze 2225: else if (NULL == res)
1.149 schwarze 2226: return 0;
1.77 schwarze 2227:
1.149 schwarze 2228: return 1;
1.77 schwarze 2229: }
2230:
2231: /*
2232: * Evaluate a complete numeric expression.
2233: * Proceed left to right, there is no concept of precedence.
2234: */
2235: static int
1.106 schwarze 2236: roff_evalnum(struct roff *r, int ln, const char *v,
1.133 schwarze 2237: int *pos, int *res, int flags)
1.77 schwarze 2238: {
2239: int mypos, operand2;
2240: char operator;
2241:
2242: if (NULL == pos) {
2243: mypos = 0;
2244: pos = &mypos;
2245: }
2246:
1.133 schwarze 2247: if (flags & ROFFNUM_WHITE)
1.77 schwarze 2248: while (isspace((unsigned char)v[*pos]))
2249: (*pos)++;
2250:
1.133 schwarze 2251: if ( ! roff_evalpar(r, ln, v, pos, res, flags))
1.149 schwarze 2252: return 0;
1.77 schwarze 2253:
2254: while (1) {
1.133 schwarze 2255: if (flags & ROFFNUM_WHITE)
1.77 schwarze 2256: while (isspace((unsigned char)v[*pos]))
2257: (*pos)++;
2258:
2259: if ( ! roff_getop(v, pos, &operator))
2260: break;
2261:
1.133 schwarze 2262: if (flags & ROFFNUM_WHITE)
1.77 schwarze 2263: while (isspace((unsigned char)v[*pos]))
2264: (*pos)++;
2265:
1.133 schwarze 2266: if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
1.149 schwarze 2267: return 0;
1.77 schwarze 2268:
1.133 schwarze 2269: if (flags & ROFFNUM_WHITE)
1.77 schwarze 2270: while (isspace((unsigned char)v[*pos]))
2271: (*pos)++;
1.79 schwarze 2272:
2273: if (NULL == res)
2274: continue;
1.77 schwarze 2275:
2276: switch (operator) {
1.80 schwarze 2277: case '+':
1.77 schwarze 2278: *res += operand2;
2279: break;
1.80 schwarze 2280: case '-':
1.77 schwarze 2281: *res -= operand2;
2282: break;
1.80 schwarze 2283: case '*':
1.77 schwarze 2284: *res *= operand2;
2285: break;
1.80 schwarze 2286: case '/':
1.116 schwarze 2287: if (operand2 == 0) {
1.106 schwarze 2288: mandoc_msg(MANDOCERR_DIVZERO,
2289: r->parse, ln, *pos, v);
2290: *res = 0;
2291: break;
2292: }
1.77 schwarze 2293: *res /= operand2;
2294: break;
1.80 schwarze 2295: case '%':
1.116 schwarze 2296: if (operand2 == 0) {
2297: mandoc_msg(MANDOCERR_DIVZERO,
2298: r->parse, ln, *pos, v);
2299: *res = 0;
2300: break;
2301: }
1.77 schwarze 2302: *res %= operand2;
2303: break;
1.80 schwarze 2304: case '<':
1.77 schwarze 2305: *res = *res < operand2;
2306: break;
1.80 schwarze 2307: case '>':
1.77 schwarze 2308: *res = *res > operand2;
2309: break;
1.80 schwarze 2310: case 'l':
1.77 schwarze 2311: *res = *res <= operand2;
2312: break;
1.80 schwarze 2313: case 'g':
1.77 schwarze 2314: *res = *res >= operand2;
2315: break;
1.80 schwarze 2316: case '=':
1.77 schwarze 2317: *res = *res == operand2;
2318: break;
1.80 schwarze 2319: case '!':
1.77 schwarze 2320: *res = *res != operand2;
2321: break;
1.80 schwarze 2322: case '&':
1.77 schwarze 2323: *res = *res && operand2;
2324: break;
1.80 schwarze 2325: case ':':
1.77 schwarze 2326: *res = *res || operand2;
2327: break;
1.80 schwarze 2328: case 'i':
1.77 schwarze 2329: if (operand2 < *res)
2330: *res = operand2;
2331: break;
1.80 schwarze 2332: case 'a':
1.77 schwarze 2333: if (operand2 > *res)
2334: *res = operand2;
2335: break;
2336: default:
2337: abort();
2338: }
2339: }
1.149 schwarze 2340: return 1;
1.77 schwarze 2341: }
2342:
1.138 schwarze 2343: /* --- register management ------------------------------------------------ */
2344:
1.52 schwarze 2345: void
1.60 schwarze 2346: roff_setreg(struct roff *r, const char *name, int val, char sign)
1.41 schwarze 2347: {
1.52 schwarze 2348: struct roffreg *reg;
2349:
2350: /* Search for an existing register with the same name. */
2351: reg = r->regtab;
2352:
2353: while (reg && strcmp(name, reg->key.p))
2354: reg = reg->next;
1.41 schwarze 2355:
1.52 schwarze 2356: if (NULL == reg) {
2357: /* Create a new register. */
2358: reg = mandoc_malloc(sizeof(struct roffreg));
2359: reg->key.p = mandoc_strdup(name);
2360: reg->key.sz = strlen(name);
1.60 schwarze 2361: reg->val = 0;
1.52 schwarze 2362: reg->next = r->regtab;
2363: r->regtab = reg;
2364: }
2365:
1.60 schwarze 2366: if ('+' == sign)
2367: reg->val += val;
2368: else if ('-' == sign)
2369: reg->val -= val;
2370: else
2371: reg->val = val;
1.41 schwarze 2372: }
2373:
1.65 schwarze 2374: /*
2375: * Handle some predefined read-only number registers.
2376: * For now, return -1 if the requested register is not predefined;
2377: * in case a predefined read-only register having the value -1
2378: * were to turn up, another special value would have to be chosen.
2379: */
2380: static int
1.145 schwarze 2381: roff_getregro(const struct roff *r, const char *name)
1.65 schwarze 2382: {
2383:
2384: switch (*name) {
1.145 schwarze 2385: case '$': /* Number of arguments of the last macro evaluated. */
1.149 schwarze 2386: return r->argc;
1.80 schwarze 2387: case 'A': /* ASCII approximation mode is always off. */
1.149 schwarze 2388: return 0;
1.80 schwarze 2389: case 'g': /* Groff compatibility mode is always on. */
1.149 schwarze 2390: return 1;
1.80 schwarze 2391: case 'H': /* Fixed horizontal resolution. */
1.149 schwarze 2392: return 24;
1.80 schwarze 2393: case 'j': /* Always adjust left margin only. */
1.149 schwarze 2394: return 0;
1.80 schwarze 2395: case 'T': /* Some output device is always defined. */
1.149 schwarze 2396: return 1;
1.80 schwarze 2397: case 'V': /* Fixed vertical resolution. */
1.149 schwarze 2398: return 40;
1.65 schwarze 2399: default:
1.149 schwarze 2400: return -1;
1.65 schwarze 2401: }
2402: }
2403:
1.53 schwarze 2404: int
1.52 schwarze 2405: roff_getreg(const struct roff *r, const char *name)
1.41 schwarze 2406: {
1.52 schwarze 2407: struct roffreg *reg;
1.65 schwarze 2408: int val;
2409:
2410: if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
1.145 schwarze 2411: val = roff_getregro(r, name + 1);
1.65 schwarze 2412: if (-1 != val)
1.149 schwarze 2413: return val;
1.65 schwarze 2414: }
1.52 schwarze 2415:
2416: for (reg = r->regtab; reg; reg = reg->next)
2417: if (0 == strcmp(name, reg->key.p))
1.149 schwarze 2418: return reg->val;
1.53 schwarze 2419:
1.149 schwarze 2420: return 0;
1.53 schwarze 2421: }
2422:
2423: static int
2424: roff_getregn(const struct roff *r, const char *name, size_t len)
2425: {
2426: struct roffreg *reg;
1.65 schwarze 2427: int val;
2428:
2429: if ('.' == name[0] && 2 == len) {
1.145 schwarze 2430: val = roff_getregro(r, name + 1);
1.65 schwarze 2431: if (-1 != val)
1.149 schwarze 2432: return val;
1.65 schwarze 2433: }
1.53 schwarze 2434:
2435: for (reg = r->regtab; reg; reg = reg->next)
2436: if (len == reg->key.sz &&
2437: 0 == strncmp(name, reg->key.p, len))
1.149 schwarze 2438: return reg->val;
1.143 schwarze 2439:
1.149 schwarze 2440: return 0;
1.143 schwarze 2441: }
2442:
2443: static int
2444: roff_hasregn(const struct roff *r, const char *name, size_t len)
2445: {
2446: struct roffreg *reg;
2447: int val;
2448:
2449: if ('.' == name[0] && 2 == len) {
1.145 schwarze 2450: val = roff_getregro(r, name + 1);
1.143 schwarze 2451: if (-1 != val)
1.149 schwarze 2452: return 1;
1.143 schwarze 2453: }
2454:
2455: for (reg = r->regtab; reg; reg = reg->next)
2456: if (len == reg->key.sz &&
2457: 0 == strncmp(name, reg->key.p, len))
1.149 schwarze 2458: return 1;
1.41 schwarze 2459:
1.149 schwarze 2460: return 0;
1.41 schwarze 2461: }
2462:
1.52 schwarze 2463: static void
2464: roff_freereg(struct roffreg *reg)
1.41 schwarze 2465: {
1.52 schwarze 2466: struct roffreg *old_reg;
1.41 schwarze 2467:
1.52 schwarze 2468: while (NULL != reg) {
2469: free(reg->key.p);
2470: old_reg = reg;
2471: reg = reg->next;
2472: free(old_reg);
2473: }
1.41 schwarze 2474: }
1.7 schwarze 2475:
2476: static enum rofferr
1.6 schwarze 2477: roff_nr(ROFF_ARGS)
1.1 schwarze 2478: {
1.85 schwarze 2479: char *key, *val;
2480: size_t keysz;
1.37 schwarze 2481: int iv;
1.60 schwarze 2482: char sign;
1.6 schwarze 2483:
1.110 schwarze 2484: key = val = buf->buf + pos;
2485: if (*key == '\0')
1.149 schwarze 2486: return ROFF_IGN;
1.85 schwarze 2487:
2488: keysz = roff_getname(r, &val, ln, pos);
1.110 schwarze 2489: if (key[keysz] == '\\')
1.149 schwarze 2490: return ROFF_IGN;
1.85 schwarze 2491: key[keysz] = '\0';
1.6 schwarze 2492:
1.60 schwarze 2493: sign = *val;
1.110 schwarze 2494: if (sign == '+' || sign == '-')
1.60 schwarze 2495: val++;
2496:
1.133 schwarze 2497: if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
1.77 schwarze 2498: roff_setreg(r, key, iv, sign);
1.1 schwarze 2499:
1.149 schwarze 2500: return ROFF_IGN;
1.76 schwarze 2501: }
2502:
2503: static enum rofferr
2504: roff_rr(ROFF_ARGS)
2505: {
2506: struct roffreg *reg, **prev;
1.85 schwarze 2507: char *name, *cp;
2508: size_t namesz;
1.76 schwarze 2509:
1.110 schwarze 2510: name = cp = buf->buf + pos;
2511: if (*name == '\0')
1.149 schwarze 2512: return ROFF_IGN;
1.85 schwarze 2513: namesz = roff_getname(r, &cp, ln, pos);
2514: name[namesz] = '\0';
1.76 schwarze 2515:
2516: prev = &r->regtab;
2517: while (1) {
2518: reg = *prev;
1.110 schwarze 2519: if (reg == NULL || !strcmp(name, reg->key.p))
1.76 schwarze 2520: break;
2521: prev = ®->next;
2522: }
1.110 schwarze 2523: if (reg != NULL) {
1.76 schwarze 2524: *prev = reg->next;
2525: free(reg->key.p);
2526: free(reg);
2527: }
1.149 schwarze 2528: return ROFF_IGN;
1.29 schwarze 2529: }
2530:
1.138 schwarze 2531: /* --- handler functions for roff requests -------------------------------- */
2532:
1.29 schwarze 2533: static enum rofferr
2534: roff_rm(ROFF_ARGS)
2535: {
2536: const char *name;
2537: char *cp;
1.85 schwarze 2538: size_t namesz;
1.29 schwarze 2539:
1.110 schwarze 2540: cp = buf->buf + pos;
2541: while (*cp != '\0') {
1.85 schwarze 2542: name = cp;
1.110 schwarze 2543: namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
1.85 schwarze 2544: roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
1.110 schwarze 2545: if (name[namesz] == '\\')
1.85 schwarze 2546: break;
1.29 schwarze 2547: }
1.149 schwarze 2548: return ROFF_IGN;
1.51 schwarze 2549: }
2550:
2551: static enum rofferr
2552: roff_it(ROFF_ARGS)
2553: {
2554: int iv;
2555:
2556: /* Parse the number of lines. */
1.133 schwarze 2557:
2558: if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
1.95 schwarze 2559: mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
1.110 schwarze 2560: ln, ppos, buf->buf + 1);
1.149 schwarze 2561: return ROFF_IGN;
1.51 schwarze 2562: }
2563:
1.134 schwarze 2564: while (isspace((unsigned char)buf->buf[pos]))
2565: pos++;
2566:
2567: /*
2568: * Arm the input line trap.
2569: * Special-casing "an-trap" is an ugly workaround to cope
2570: * with DocBook stupidly fiddling with man(7) internals.
2571: */
1.133 schwarze 2572:
1.51 schwarze 2573: roffit_lines = iv;
1.134 schwarze 2574: roffit_macro = mandoc_strdup(iv != 1 ||
2575: strcmp(buf->buf + pos, "an-trap") ?
2576: buf->buf + pos : "br");
1.149 schwarze 2577: return ROFF_IGN;
1.47 schwarze 2578: }
2579:
2580: static enum rofferr
2581: roff_Dd(ROFF_ARGS)
2582: {
2583: const char *const *cp;
2584:
1.99 schwarze 2585: if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
1.47 schwarze 2586: for (cp = __mdoc_reserved; *cp; cp++)
2587: roff_setstr(r, *cp, NULL, 0);
2588:
1.99 schwarze 2589: if (r->format == 0)
2590: r->format = MPARSE_MDOC;
2591:
1.149 schwarze 2592: return ROFF_CONT;
1.47 schwarze 2593: }
2594:
2595: static enum rofferr
2596: roff_TH(ROFF_ARGS)
2597: {
2598: const char *const *cp;
2599:
1.99 schwarze 2600: if ((r->options & MPARSE_QUICK) == 0)
1.47 schwarze 2601: for (cp = __man_reserved; *cp; cp++)
2602: roff_setstr(r, *cp, NULL, 0);
2603:
1.99 schwarze 2604: if (r->format == 0)
2605: r->format = MPARSE_MAN;
2606:
1.149 schwarze 2607: return ROFF_CONT;
1.14 schwarze 2608: }
2609:
2610: static enum rofferr
1.27 schwarze 2611: roff_TE(ROFF_ARGS)
2612: {
2613:
2614: if (NULL == r->tbl)
1.94 schwarze 2615: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
2616: ln, ppos, "TE");
1.130 schwarze 2617: else if ( ! tbl_end(&r->tbl)) {
2618: free(buf->buf);
2619: buf->buf = mandoc_strdup(".sp");
2620: buf->sz = 4;
1.149 schwarze 2621: return ROFF_REPARSE;
1.130 schwarze 2622: }
1.149 schwarze 2623: return ROFF_IGN;
1.27 schwarze 2624: }
2625:
2626: static enum rofferr
2627: roff_T_(ROFF_ARGS)
2628: {
2629:
2630: if (NULL == r->tbl)
1.94 schwarze 2631: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
2632: ln, ppos, "T&");
1.27 schwarze 2633: else
2634: tbl_restart(ppos, ln, r->tbl);
2635:
1.149 schwarze 2636: return ROFF_IGN;
1.27 schwarze 2637: }
2638:
1.102 schwarze 2639: /*
2640: * Handle in-line equation delimiters.
2641: */
2642: static enum rofferr
1.110 schwarze 2643: roff_eqndelim(struct roff *r, struct buf *buf, int pos)
1.41 schwarze 2644: {
1.105 schwarze 2645: char *cp1, *cp2;
2646: const char *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
1.41 schwarze 2647:
1.102 schwarze 2648: /*
2649: * Outside equations, look for an opening delimiter.
2650: * If we are inside an equation, we already know it is
2651: * in-line, or this function wouldn't have been called;
2652: * so look for a closing delimiter.
2653: */
2654:
1.110 schwarze 2655: cp1 = buf->buf + pos;
1.102 schwarze 2656: cp2 = strchr(cp1, r->eqn == NULL ?
2657: r->last_eqn->odelim : r->last_eqn->cdelim);
2658: if (cp2 == NULL)
1.149 schwarze 2659: return ROFF_CONT;
1.102 schwarze 2660:
1.105 schwarze 2661: *cp2++ = '\0';
2662: bef_pr = bef_nl = aft_nl = aft_pr = "";
2663:
2664: /* Handle preceding text, protecting whitespace. */
2665:
1.110 schwarze 2666: if (*buf->buf != '\0') {
1.105 schwarze 2667: if (r->eqn == NULL)
2668: bef_pr = "\\&";
2669: bef_nl = "\n";
2670: }
2671:
2672: /*
2673: * Prepare replacing the delimiter with an equation macro
2674: * and drop leading white space from the equation.
2675: */
1.102 schwarze 2676:
1.105 schwarze 2677: if (r->eqn == NULL) {
2678: while (*cp2 == ' ')
2679: cp2++;
2680: mac = ".EQ";
2681: } else
2682: mac = ".EN";
2683:
2684: /* Handle following text, protecting whitespace. */
2685:
2686: if (*cp2 != '\0') {
2687: aft_nl = "\n";
2688: if (r->eqn != NULL)
2689: aft_pr = "\\&";
2690: }
2691:
2692: /* Do the actual replacement. */
2693:
1.110 schwarze 2694: buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
1.105 schwarze 2695: bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
1.110 schwarze 2696: free(buf->buf);
2697: buf->buf = cp1;
1.102 schwarze 2698:
2699: /* Toggle the in-line state of the eqn subsystem. */
2700:
2701: r->eqn_inline = r->eqn == NULL;
1.149 schwarze 2702: return ROFF_REPARSE;
1.41 schwarze 2703: }
2704:
1.107 schwarze 2705: static enum rofferr
2706: roff_EQ(ROFF_ARGS)
1.32 schwarze 2707: {
1.41 schwarze 2708: struct eqn_node *e;
1.32 schwarze 2709:
1.110 schwarze 2710: assert(r->eqn == NULL);
1.107 schwarze 2711: e = eqn_alloc(ppos, ln, r->parse);
1.32 schwarze 2712:
1.102 schwarze 2713: if (r->last_eqn) {
1.32 schwarze 2714: r->last_eqn->next = e;
1.102 schwarze 2715: e->delim = r->last_eqn->delim;
2716: e->odelim = r->last_eqn->odelim;
2717: e->cdelim = r->last_eqn->cdelim;
2718: } else
1.32 schwarze 2719: r->first_eqn = r->last_eqn = e;
2720:
2721: r->eqn = r->last_eqn = e;
1.41 schwarze 2722:
1.110 schwarze 2723: if (buf->buf[pos] != '\0')
1.107 schwarze 2724: mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
1.110 schwarze 2725: ".EQ %s", buf->buf + pos);
1.41 schwarze 2726:
1.149 schwarze 2727: return ROFF_IGN;
1.32 schwarze 2728: }
2729:
2730: static enum rofferr
2731: roff_EN(ROFF_ARGS)
2732: {
2733:
1.94 schwarze 2734: mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
1.149 schwarze 2735: return ROFF_IGN;
1.32 schwarze 2736: }
2737:
2738: static enum rofferr
1.27 schwarze 2739: roff_TS(ROFF_ARGS)
2740: {
1.49 schwarze 2741: struct tbl_node *tbl;
1.27 schwarze 2742:
2743: if (r->tbl) {
1.94 schwarze 2744: mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
2745: ln, ppos, "TS breaks TS");
1.41 schwarze 2746: tbl_end(&r->tbl);
1.27 schwarze 2747: }
2748:
1.49 schwarze 2749: tbl = tbl_alloc(ppos, ln, r->parse);
1.27 schwarze 2750:
2751: if (r->last_tbl)
1.49 schwarze 2752: r->last_tbl->next = tbl;
1.27 schwarze 2753: else
1.49 schwarze 2754: r->first_tbl = r->last_tbl = tbl;
1.27 schwarze 2755:
1.49 schwarze 2756: r->tbl = r->last_tbl = tbl;
1.149 schwarze 2757: return ROFF_IGN;
1.123 schwarze 2758: }
2759:
2760: static enum rofferr
2761: roff_brp(ROFF_ARGS)
2762: {
2763:
2764: buf->buf[pos - 1] = '\0';
1.149 schwarze 2765: return ROFF_CONT;
1.27 schwarze 2766: }
2767:
2768: static enum rofferr
1.48 schwarze 2769: roff_cc(ROFF_ARGS)
2770: {
2771: const char *p;
2772:
1.110 schwarze 2773: p = buf->buf + pos;
1.48 schwarze 2774:
1.110 schwarze 2775: if (*p == '\0' || (r->control = *p++) == '.')
1.48 schwarze 2776: r->control = 0;
2777:
1.110 schwarze 2778: if (*p != '\0')
1.132 schwarze 2779: mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
2780: ln, p - buf->buf, "cc ... %s", p);
1.48 schwarze 2781:
1.149 schwarze 2782: return ROFF_IGN;
1.48 schwarze 2783: }
2784:
2785: static enum rofferr
1.42 schwarze 2786: roff_tr(ROFF_ARGS)
2787: {
2788: const char *p, *first, *second;
2789: size_t fsz, ssz;
2790: enum mandoc_esc esc;
2791:
1.110 schwarze 2792: p = buf->buf + pos;
1.42 schwarze 2793:
1.110 schwarze 2794: if (*p == '\0') {
1.132 schwarze 2795: mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
1.149 schwarze 2796: return ROFF_IGN;
1.42 schwarze 2797: }
2798:
1.110 schwarze 2799: while (*p != '\0') {
1.42 schwarze 2800: fsz = ssz = 1;
2801:
2802: first = p++;
1.110 schwarze 2803: if (*first == '\\') {
1.42 schwarze 2804: esc = mandoc_escape(&p, NULL, NULL);
1.110 schwarze 2805: if (esc == ESCAPE_ERROR) {
1.92 schwarze 2806: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.110 schwarze 2807: ln, (int)(p - buf->buf), first);
1.149 schwarze 2808: return ROFF_IGN;
1.42 schwarze 2809: }
2810: fsz = (size_t)(p - first);
2811: }
2812:
2813: second = p++;
1.110 schwarze 2814: if (*second == '\\') {
1.42 schwarze 2815: esc = mandoc_escape(&p, NULL, NULL);
1.110 schwarze 2816: if (esc == ESCAPE_ERROR) {
1.92 schwarze 2817: mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
1.110 schwarze 2818: ln, (int)(p - buf->buf), second);
1.149 schwarze 2819: return ROFF_IGN;
1.42 schwarze 2820: }
2821: ssz = (size_t)(p - second);
1.110 schwarze 2822: } else if (*second == '\0') {
1.132 schwarze 2823: mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
2824: ln, first - buf->buf, "tr %s", first);
1.42 schwarze 2825: second = " ";
2826: p--;
2827: }
2828:
2829: if (fsz > 1) {
1.80 schwarze 2830: roff_setstrn(&r->xmbtab, first, fsz,
2831: second, ssz, 0);
1.42 schwarze 2832: continue;
2833: }
2834:
1.110 schwarze 2835: if (r->xtab == NULL)
1.80 schwarze 2836: r->xtab = mandoc_calloc(128,
2837: sizeof(struct roffstr));
1.42 schwarze 2838:
2839: free(r->xtab[(int)*first].p);
2840: r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
2841: r->xtab[(int)*first].sz = ssz;
2842: }
2843:
1.149 schwarze 2844: return ROFF_IGN;
1.42 schwarze 2845: }
2846:
2847: static enum rofferr
1.14 schwarze 2848: roff_so(ROFF_ARGS)
2849: {
1.121 schwarze 2850: char *name, *cp;
1.15 schwarze 2851:
1.110 schwarze 2852: name = buf->buf + pos;
1.97 schwarze 2853: mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
1.14 schwarze 2854:
1.22 schwarze 2855: /*
2856: * Handle `so'. Be EXTREMELY careful, as we shouldn't be
2857: * opening anything that's not in our cwd or anything beneath
2858: * it. Thus, explicitly disallow traversing up the file-system
2859: * or using absolute paths.
2860: */
2861:
1.110 schwarze 2862: if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
1.83 schwarze 2863: mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
2864: ".so %s", name);
1.121 schwarze 2865: buf->sz = mandoc_asprintf(&cp,
2866: ".sp\nSee the file %s.\n.sp", name) + 1;
2867: free(buf->buf);
2868: buf->buf = cp;
2869: *offs = 0;
1.149 schwarze 2870: return ROFF_REPARSE;
1.14 schwarze 2871: }
2872:
2873: *offs = pos;
1.149 schwarze 2874: return ROFF_SO;
1.7 schwarze 2875: }
2876:
1.138 schwarze 2877: /* --- user defined strings and macros ------------------------------------ */
2878:
1.16 schwarze 2879: static enum rofferr
2880: roff_userdef(ROFF_ARGS)
1.12 schwarze 2881: {
1.135 schwarze 2882: const char *arg[9], *ap;
1.16 schwarze 2883: char *cp, *n1, *n2;
1.164 schwarze 2884: int expand_count, i, ib, ie;
1.135 schwarze 2885: size_t asz, rsz;
1.12 schwarze 2886:
1.16 schwarze 2887: /*
2888: * Collect pointers to macro argument strings
1.61 schwarze 2889: * and NUL-terminate them.
1.16 schwarze 2890: */
1.135 schwarze 2891:
1.145 schwarze 2892: r->argc = 0;
1.110 schwarze 2893: cp = buf->buf + pos;
1.145 schwarze 2894: for (i = 0; i < 9; i++) {
2895: if (*cp == '\0')
2896: arg[i] = "";
2897: else {
2898: arg[i] = mandoc_getarg(r->parse, &cp, ln, &pos);
2899: r->argc = i + 1;
2900: }
2901: }
1.16 schwarze 2902:
2903: /*
2904: * Expand macro arguments.
1.12 schwarze 2905: */
1.135 schwarze 2906:
2907: buf->sz = strlen(r->current_string) + 1;
1.164 schwarze 2908: n1 = n2 = cp = mandoc_malloc(buf->sz);
1.135 schwarze 2909: memcpy(n1, r->current_string, buf->sz);
1.164 schwarze 2910: expand_count = 0;
1.135 schwarze 2911: while (*cp != '\0') {
2912:
2913: /* Scan ahead for the next argument invocation. */
2914:
2915: if (*cp++ != '\\')
2916: continue;
2917: if (*cp++ != '$')
2918: continue;
1.146 schwarze 2919: if (*cp == '*') { /* \\$* inserts all arguments */
2920: ib = 0;
2921: ie = r->argc - 1;
2922: } else { /* \\$1 .. \\$9 insert one argument */
2923: ib = ie = *cp - '1';
2924: if (ib < 0 || ib > 8)
2925: continue;
2926: }
1.135 schwarze 2927: cp -= 2;
1.164 schwarze 2928:
2929: /*
2930: * Prevent infinite recursion.
2931: */
2932:
2933: if (cp >= n2)
2934: expand_count = 1;
2935: else if (++expand_count > EXPAND_LIMIT) {
2936: mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
2937: ln, (int)(cp - n1), NULL);
1.165 schwarze 2938: free(buf->buf);
2939: buf->buf = n1;
1.164 schwarze 2940: return ROFF_IGN;
2941: }
1.135 schwarze 2942:
2943: /*
2944: * Determine the size of the expanded argument,
2945: * taking escaping of quotes into account.
2946: */
2947:
1.146 schwarze 2948: asz = ie > ib ? ie - ib : 0; /* for blanks */
2949: for (i = ib; i <= ie; i++) {
2950: for (ap = arg[i]; *ap != '\0'; ap++) {
2951: asz++;
2952: if (*ap == '"')
2953: asz += 3;
2954: }
1.135 schwarze 2955: }
2956: if (asz != 3) {
2957:
2958: /*
2959: * Determine the size of the rest of the
2960: * unexpanded macro, including the NUL.
2961: */
2962:
2963: rsz = buf->sz - (cp - n1) - 3;
2964:
2965: /*
2966: * When shrinking, move before
2967: * releasing the storage.
2968: */
2969:
2970: if (asz < 3)
2971: memmove(cp + asz, cp + 3, rsz);
2972:
2973: /*
2974: * Resize the storage for the macro
2975: * and readjust the parse pointer.
2976: */
2977:
2978: buf->sz += asz - 3;
2979: n2 = mandoc_realloc(n1, buf->sz);
2980: cp = n2 + (cp - n1);
2981: n1 = n2;
2982:
2983: /*
2984: * When growing, make room
2985: * for the expanded argument.
2986: */
2987:
2988: if (asz > 3)
2989: memmove(cp + asz, cp + 3, rsz);
2990: }
2991:
2992: /* Copy the expanded argument, escaping quotes. */
2993:
2994: n2 = cp;
1.146 schwarze 2995: for (i = ib; i <= ie; i++) {
2996: for (ap = arg[i]; *ap != '\0'; ap++) {
2997: if (*ap == '"') {
2998: memcpy(n2, "\\(dq", 4);
2999: n2 += 4;
3000: } else
3001: *n2++ = *ap;
3002: }
3003: if (i < ie)
3004: *n2++ = ' ';
1.16 schwarze 3005: }
1.12 schwarze 3006: }
3007:
1.16 schwarze 3008: /*
3009: * Replace the macro invocation
3010: * by the expanded macro.
3011: */
1.135 schwarze 3012:
1.110 schwarze 3013: free(buf->buf);
3014: buf->buf = n1;
1.120 schwarze 3015: *offs = 0;
1.16 schwarze 3016:
1.149 schwarze 3017: return buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
3018: ROFF_REPARSE : ROFF_APPEND;
1.12 schwarze 3019: }
1.28 schwarze 3020:
1.85 schwarze 3021: static size_t
1.28 schwarze 3022: roff_getname(struct roff *r, char **cpp, int ln, int pos)
3023: {
3024: char *name, *cp;
1.85 schwarze 3025: size_t namesz;
1.28 schwarze 3026:
3027: name = *cpp;
3028: if ('\0' == *name)
1.149 schwarze 3029: return 0;
1.28 schwarze 3030:
1.85 schwarze 3031: /* Read until end of name and terminate it with NUL. */
3032: for (cp = name; 1; cp++) {
3033: if ('\0' == *cp || ' ' == *cp) {
3034: namesz = cp - name;
3035: break;
3036: }
1.28 schwarze 3037: if ('\\' != *cp)
3038: continue;
1.88 schwarze 3039: namesz = cp - name;
3040: if ('{' == cp[1] || '}' == cp[1])
3041: break;
1.28 schwarze 3042: cp++;
3043: if ('\\' == *cp)
3044: continue;
1.97 schwarze 3045: mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
3046: "%.*s", (int)(cp - name + 1), name);
1.85 schwarze 3047: mandoc_escape((const char **)&cp, NULL, NULL);
3048: break;
1.28 schwarze 3049: }
3050:
3051: /* Read past spaces. */
3052: while (' ' == *cp)
3053: cp++;
3054:
3055: *cpp = cp;
1.149 schwarze 3056: return namesz;
1.28 schwarze 3057: }
3058:
1.16 schwarze 3059: /*
3060: * Store *string into the user-defined string called *name.
3061: * To clear an existing entry, call with (*r, *name, NULL, 0).
1.66 schwarze 3062: * append == 0: replace mode
3063: * append == 1: single-line append mode
3064: * append == 2: multiline append mode, append '\n' after each call
1.16 schwarze 3065: */
1.8 schwarze 3066: static void
1.16 schwarze 3067: roff_setstr(struct roff *r, const char *name, const char *string,
1.66 schwarze 3068: int append)
1.7 schwarze 3069: {
1.42 schwarze 3070:
3071: roff_setstrn(&r->strtab, name, strlen(name), string,
1.80 schwarze 3072: string ? strlen(string) : 0, append);
1.42 schwarze 3073: }
3074:
3075: static void
3076: roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
1.66 schwarze 3077: const char *string, size_t stringsz, int append)
1.42 schwarze 3078: {
3079: struct roffkv *n;
3080: char *c;
3081: int i;
3082: size_t oldch, newch;
1.7 schwarze 3083:
1.16 schwarze 3084: /* Search for an existing string with the same name. */
1.42 schwarze 3085: n = *r;
3086:
1.84 schwarze 3087: while (n && (namesz != n->key.sz ||
3088: strncmp(n->key.p, name, namesz)))
1.7 schwarze 3089: n = n->next;
1.8 schwarze 3090:
3091: if (NULL == n) {
1.16 schwarze 3092: /* Create a new string table entry. */
1.42 schwarze 3093: n = mandoc_malloc(sizeof(struct roffkv));
3094: n->key.p = mandoc_strndup(name, namesz);
3095: n->key.sz = namesz;
3096: n->val.p = NULL;
3097: n->val.sz = 0;
3098: n->next = *r;
3099: *r = n;
1.66 schwarze 3100: } else if (0 == append) {
1.42 schwarze 3101: free(n->val.p);
3102: n->val.p = NULL;
3103: n->val.sz = 0;
1.16 schwarze 3104: }
3105:
3106: if (NULL == string)
3107: return;
3108:
3109: /*
3110: * One additional byte for the '\n' in multiline mode,
3111: * and one for the terminating '\0'.
3112: */
1.66 schwarze 3113: newch = stringsz + (1 < append ? 2u : 1u);
1.42 schwarze 3114:
3115: if (NULL == n->val.p) {
3116: n->val.p = mandoc_malloc(newch);
3117: *n->val.p = '\0';
1.16 schwarze 3118: oldch = 0;
3119: } else {
1.42 schwarze 3120: oldch = n->val.sz;
3121: n->val.p = mandoc_realloc(n->val.p, oldch + newch);
1.16 schwarze 3122: }
3123:
3124: /* Skip existing content in the destination buffer. */
1.42 schwarze 3125: c = n->val.p + (int)oldch;
1.16 schwarze 3126:
3127: /* Append new content to the destination buffer. */
1.42 schwarze 3128: i = 0;
3129: while (i < (int)stringsz) {
1.16 schwarze 3130: /*
3131: * Rudimentary roff copy mode:
3132: * Handle escaped backslashes.
3133: */
1.42 schwarze 3134: if ('\\' == string[i] && '\\' == string[i + 1])
3135: i++;
3136: *c++ = string[i++];
1.16 schwarze 3137: }
1.8 schwarze 3138:
1.16 schwarze 3139: /* Append terminating bytes. */
1.66 schwarze 3140: if (1 < append)
1.16 schwarze 3141: *c++ = '\n';
1.42 schwarze 3142:
1.16 schwarze 3143: *c = '\0';
1.42 schwarze 3144: n->val.sz = (int)(c - n->val.p);
1.7 schwarze 3145: }
3146:
1.8 schwarze 3147: static const char *
3148: roff_getstrn(const struct roff *r, const char *name, size_t len)
1.7 schwarze 3149: {
1.42 schwarze 3150: const struct roffkv *n;
1.64 schwarze 3151: int i;
1.7 schwarze 3152:
1.42 schwarze 3153: for (n = r->strtab; n; n = n->next)
1.80 schwarze 3154: if (0 == strncmp(name, n->key.p, len) &&
3155: '\0' == n->key.p[(int)len])
1.149 schwarze 3156: return n->val.p;
1.64 schwarze 3157:
3158: for (i = 0; i < PREDEFS_MAX; i++)
3159: if (0 == strncmp(name, predefs[i].name, len) &&
3160: '\0' == predefs[i].name[(int)len])
1.149 schwarze 3161: return predefs[i].str;
1.8 schwarze 3162:
1.149 schwarze 3163: return NULL;
1.7 schwarze 3164: }
3165:
1.8 schwarze 3166: static void
1.42 schwarze 3167: roff_freestr(struct roffkv *r)
1.7 schwarze 3168: {
1.42 schwarze 3169: struct roffkv *n, *nn;
1.7 schwarze 3170:
1.42 schwarze 3171: for (n = r; n; n = nn) {
3172: free(n->key.p);
3173: free(n->val.p);
1.7 schwarze 3174: nn = n->next;
3175: free(n);
3176: }
1.27 schwarze 3177: }
1.138 schwarze 3178:
3179: /* --- accessors and utility functions ------------------------------------ */
1.27 schwarze 3180:
3181: const struct tbl_span *
3182: roff_span(const struct roff *r)
3183: {
1.80 schwarze 3184:
1.149 schwarze 3185: return r->tbl ? tbl_span(r->tbl) : NULL;
1.32 schwarze 3186: }
3187:
3188: const struct eqn *
3189: roff_eqn(const struct roff *r)
3190: {
1.80 schwarze 3191:
1.149 schwarze 3192: return r->last_eqn ? &r->last_eqn->eqn : NULL;
1.42 schwarze 3193: }
3194:
3195: /*
3196: * Duplicate an input string, making the appropriate character
3197: * conversations (as stipulated by `tr') along the way.
3198: * Returns a heap-allocated string with all the replacements made.
3199: */
3200: char *
3201: roff_strdup(const struct roff *r, const char *p)
3202: {
3203: const struct roffkv *cp;
3204: char *res;
3205: const char *pp;
3206: size_t ssz, sz;
3207: enum mandoc_esc esc;
3208:
3209: if (NULL == r->xmbtab && NULL == r->xtab)
1.149 schwarze 3210: return mandoc_strdup(p);
1.42 schwarze 3211: else if ('\0' == *p)
1.149 schwarze 3212: return mandoc_strdup("");
1.42 schwarze 3213:
3214: /*
3215: * Step through each character looking for term matches
3216: * (remember that a `tr' can be invoked with an escape, which is
3217: * a glyph but the escape is multi-character).
3218: * We only do this if the character hash has been initialised
3219: * and the string is >0 length.
3220: */
3221:
3222: res = NULL;
3223: ssz = 0;
3224:
3225: while ('\0' != *p) {
1.161 schwarze 3226: assert((unsigned int)*p < 128);
3227: if ('\\' != *p && r->xtab && r->xtab[(unsigned int)*p].p) {
1.42 schwarze 3228: sz = r->xtab[(int)*p].sz;
3229: res = mandoc_realloc(res, ssz + sz + 1);
3230: memcpy(res + ssz, r->xtab[(int)*p].p, sz);
3231: ssz += sz;
3232: p++;
3233: continue;
3234: } else if ('\\' != *p) {
3235: res = mandoc_realloc(res, ssz + 2);
3236: res[ssz++] = *p++;
3237: continue;
3238: }
3239:
3240: /* Search for term matches. */
3241: for (cp = r->xmbtab; cp; cp = cp->next)
3242: if (0 == strncmp(p, cp->key.p, cp->key.sz))
3243: break;
3244:
3245: if (NULL != cp) {
3246: /*
3247: * A match has been found.
3248: * Append the match to the array and move
3249: * forward by its keysize.
3250: */
1.80 schwarze 3251: res = mandoc_realloc(res,
3252: ssz + cp->val.sz + 1);
1.42 schwarze 3253: memcpy(res + ssz, cp->val.p, cp->val.sz);
3254: ssz += cp->val.sz;
3255: p += (int)cp->key.sz;
3256: continue;
3257: }
3258:
3259: /*
3260: * Handle escapes carefully: we need to copy
3261: * over just the escape itself, or else we might
3262: * do replacements within the escape itself.
3263: * Make sure to pass along the bogus string.
3264: */
3265: pp = p++;
3266: esc = mandoc_escape(&p, NULL, NULL);
3267: if (ESCAPE_ERROR == esc) {
3268: sz = strlen(pp);
3269: res = mandoc_realloc(res, ssz + sz + 1);
3270: memcpy(res + ssz, pp, sz);
3271: break;
3272: }
1.80 schwarze 3273: /*
3274: * We bail out on bad escapes.
1.42 schwarze 3275: * No need to warn: we already did so when
3276: * roff_res() was called.
3277: */
3278: sz = (int)(p - pp);
3279: res = mandoc_realloc(res, ssz + sz + 1);
3280: memcpy(res + ssz, pp, sz);
3281: ssz += sz;
3282: }
3283:
3284: res[(int)ssz] = '\0';
1.149 schwarze 3285: return res;
1.99 schwarze 3286: }
3287:
3288: int
3289: roff_getformat(const struct roff *r)
3290: {
3291:
1.149 schwarze 3292: return r->format;
1.48 schwarze 3293: }
3294:
3295: /*
1.80 schwarze 3296: * Find out whether a line is a macro line or not.
1.48 schwarze 3297: * If it is, adjust the current position and return one; if it isn't,
3298: * return zero and don't change the current position.
3299: * If the control character has been set with `.cc', then let that grain
3300: * precedence.
3301: * This is slighly contrary to groff, where using the non-breaking
3302: * control character when `cc' has been invoked will cause the
3303: * non-breaking macro contents to be printed verbatim.
3304: */
3305: int
3306: roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
3307: {
3308: int pos;
3309:
3310: pos = *ppos;
3311:
3312: if (0 != r->control && cp[pos] == r->control)
3313: pos++;
3314: else if (0 != r->control)
1.149 schwarze 3315: return 0;
1.48 schwarze 3316: else if ('\\' == cp[pos] && '.' == cp[pos + 1])
3317: pos += 2;
3318: else if ('.' == cp[pos] || '\'' == cp[pos])
3319: pos++;
3320: else
1.149 schwarze 3321: return 0;
1.48 schwarze 3322:
3323: while (' ' == cp[pos] || '\t' == cp[pos])
3324: pos++;
3325:
3326: *ppos = pos;
1.149 schwarze 3327: return 1;
1.1 schwarze 3328: }
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