-/* $Id: roff.c,v 1.90 2010/06/27 15:52:41 kristaps Exp $ */
+/* $Id: roff.c,v 1.284 2016/01/08 17:48:10 schwarze Exp $ */
/*
- * Copyright (c) 2010 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2008-2012, 2014 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010-2015 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
- * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
-#ifdef HAVE_CONFIG_H
#include "config.h"
-#endif
+
+#include <sys/types.h>
#include <assert.h>
-#include <errno.h>
#include <ctype.h>
#include <limits.h>
+#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <stdio.h>
#include "mandoc.h"
-#include "regs.h"
+#include "mandoc_aux.h"
#include "roff.h"
+#include "libmandoc.h"
+#include "roff_int.h"
+#include "libroff.h"
-#define RSTACK_MAX 128
-
-#define ROFF_CTL(c) \
- ('.' == (c) || '\'' == (c))
+/* Maximum number of string expansions per line, to break infinite loops. */
+#define EXPAND_LIMIT 1000
-#if 1
-#define ROFF_DEBUG(fmt, args...) \
- do { /* Nothing. */ } while (/*CONSTCOND*/ 0)
-#else
-#define ROFF_DEBUG(fmt, args...) \
- do { fprintf(stderr, fmt , ##args); } while (/*CONSTCOND*/ 0)
-#endif
+/* --- data types --------------------------------------------------------- */
enum rofft {
+ ROFF_ab,
+ ROFF_ad,
+ ROFF_af,
+ ROFF_aln,
+ ROFF_als,
ROFF_am,
- ROFF_ami,
ROFF_am1,
+ ROFF_ami,
+ ROFF_ami1,
+ ROFF_as,
+ ROFF_as1,
+ ROFF_asciify,
+ ROFF_backtrace,
+ ROFF_bd,
+ ROFF_bleedat,
+ ROFF_blm,
+ ROFF_box,
+ ROFF_boxa,
+ ROFF_bp,
+ ROFF_BP,
+ /* MAN_br, MDOC_br */
+ ROFF_break,
+ ROFF_breakchar,
+ ROFF_brnl,
+ ROFF_brp,
+ ROFF_brpnl,
+ ROFF_c2,
+ ROFF_cc,
+ ROFF_ce,
+ ROFF_cf,
+ ROFF_cflags,
+ ROFF_ch,
+ ROFF_char,
+ ROFF_chop,
+ ROFF_class,
+ ROFF_close,
+ ROFF_CL,
+ ROFF_color,
+ ROFF_composite,
+ ROFF_continue,
+ ROFF_cp,
+ ROFF_cropat,
+ ROFF_cs,
+ ROFF_cu,
+ ROFF_da,
+ ROFF_dch,
+ ROFF_Dd,
ROFF_de,
- ROFF_dei,
ROFF_de1,
+ ROFF_defcolor,
+ ROFF_dei,
+ ROFF_dei1,
+ ROFF_device,
+ ROFF_devicem,
+ ROFF_di,
+ ROFF_do,
ROFF_ds,
+ ROFF_ds1,
+ ROFF_dwh,
+ ROFF_dt,
+ ROFF_ec,
+ ROFF_ecr,
+ ROFF_ecs,
ROFF_el,
+ ROFF_em,
+ ROFF_EN,
+ ROFF_eo,
+ ROFF_EP,
+ ROFF_EQ,
+ ROFF_errprint,
+ ROFF_ev,
+ ROFF_evc,
+ ROFF_ex,
+ ROFF_fallback,
+ ROFF_fam,
+ ROFF_fc,
+ ROFF_fchar,
+ ROFF_fcolor,
+ ROFF_fdeferlig,
+ ROFF_feature,
+ /* MAN_fi; ignored in mdoc(7) */
+ ROFF_fkern,
+ ROFF_fl,
+ ROFF_flig,
+ ROFF_fp,
+ ROFF_fps,
+ ROFF_fschar,
+ ROFF_fspacewidth,
+ ROFF_fspecial,
+ /* MAN_ft; ignored in mdoc(7) */
+ ROFF_ftr,
+ ROFF_fzoom,
+ ROFF_gcolor,
+ ROFF_hc,
+ ROFF_hcode,
+ ROFF_hidechar,
+ ROFF_hla,
+ ROFF_hlm,
+ ROFF_hpf,
+ ROFF_hpfa,
+ ROFF_hpfcode,
+ ROFF_hw,
+ ROFF_hy,
+ ROFF_hylang,
+ ROFF_hylen,
+ ROFF_hym,
+ ROFF_hypp,
+ ROFF_hys,
ROFF_ie,
ROFF_if,
ROFF_ig,
+ /* MAN_in; ignored in mdoc(7) */
+ ROFF_index,
+ ROFF_it,
+ ROFF_itc,
+ ROFF_IX,
+ ROFF_kern,
+ ROFF_kernafter,
+ ROFF_kernbefore,
+ ROFF_kernpair,
+ ROFF_lc,
+ ROFF_lc_ctype,
+ ROFF_lds,
+ ROFF_length,
+ ROFF_letadj,
+ ROFF_lf,
+ ROFF_lg,
+ ROFF_lhang,
+ ROFF_linetabs,
+ /* MAN_ll, MDOC_ll */
+ ROFF_lnr,
+ ROFF_lnrf,
+ ROFF_lpfx,
+ ROFF_ls,
+ ROFF_lsm,
+ ROFF_lt,
+ ROFF_mc,
+ ROFF_mediasize,
+ ROFF_minss,
+ ROFF_mk,
+ ROFF_mso,
+ ROFF_na,
+ ROFF_ne,
+ /* MAN_nf; ignored in mdoc(7) */
+ ROFF_nh,
+ ROFF_nhychar,
+ ROFF_nm,
+ ROFF_nn,
+ ROFF_nop,
+ ROFF_nr,
+ ROFF_nrf,
+ ROFF_nroff,
+ ROFF_ns,
+ ROFF_nx,
+ ROFF_open,
+ ROFF_opena,
+ ROFF_os,
+ ROFF_output,
+ ROFF_padj,
+ ROFF_papersize,
+ ROFF_pc,
+ ROFF_pev,
+ ROFF_pi,
+ ROFF_PI,
+ ROFF_pl,
+ ROFF_pm,
+ ROFF_pn,
+ ROFF_pnr,
+ ROFF_po,
+ ROFF_ps,
+ ROFF_psbb,
+ ROFF_pshape,
+ ROFF_pso,
+ ROFF_ptr,
+ ROFF_pvs,
+ ROFF_rchar,
+ ROFF_rd,
+ ROFF_recursionlimit,
+ ROFF_return,
+ ROFF_rfschar,
+ ROFF_rhang,
+ ROFF_rj,
ROFF_rm,
+ ROFF_rn,
+ ROFF_rnn,
+ ROFF_rr,
+ ROFF_rs,
+ ROFF_rt,
+ ROFF_schar,
+ ROFF_sentchar,
+ ROFF_shc,
+ ROFF_shift,
+ ROFF_sizes,
+ ROFF_so,
+ /* MAN_sp, MDOC_sp */
+ ROFF_spacewidth,
+ ROFF_special,
+ ROFF_spreadwarn,
+ ROFF_ss,
+ ROFF_sty,
+ ROFF_substring,
+ ROFF_sv,
+ ROFF_sy,
+ ROFF_T_,
+ ROFF_ta,
+ ROFF_tc,
+ ROFF_TE,
+ ROFF_TH,
+ ROFF_ti,
+ ROFF_tkf,
+ ROFF_tl,
+ ROFF_tm,
+ ROFF_tm1,
+ ROFF_tmc,
ROFF_tr,
+ ROFF_track,
+ ROFF_transchar,
+ ROFF_trf,
+ ROFF_trimat,
+ ROFF_trin,
+ ROFF_trnt,
+ ROFF_troff,
+ ROFF_TS,
+ ROFF_uf,
+ ROFF_ul,
+ ROFF_unformat,
+ ROFF_unwatch,
+ ROFF_unwatchn,
+ ROFF_vpt,
+ ROFF_vs,
+ ROFF_warn,
+ ROFF_warnscale,
+ ROFF_watch,
+ ROFF_watchlength,
+ ROFF_watchn,
+ ROFF_wh,
+ ROFF_while,
+ ROFF_write,
+ ROFF_writec,
+ ROFF_writem,
+ ROFF_xflag,
ROFF_cblock,
- ROFF_ccond,
- ROFF_nr,
+ ROFF_USERDEF,
ROFF_MAX
};
-enum roffrule {
- ROFFRULE_ALLOW,
- ROFFRULE_DENY
+/*
+ * An incredibly-simple string buffer.
+ */
+struct roffstr {
+ char *p; /* nil-terminated buffer */
+ size_t sz; /* saved strlen(p) */
+};
+
+/*
+ * A key-value roffstr pair as part of a singly-linked list.
+ */
+struct roffkv {
+ struct roffstr key;
+ struct roffstr val;
+ struct roffkv *next; /* next in list */
+};
+
+/*
+ * A single number register as part of a singly-linked list.
+ */
+struct roffreg {
+ struct roffstr key;
+ int val;
+ struct roffreg *next;
};
struct roff {
+ struct mparse *parse; /* parse point */
struct roffnode *last; /* leaf of stack */
- mandocmsg msg; /* err/warn/fatal messages */
- void *data; /* privdata for messages */
- enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */
+ int *rstack; /* stack of inverted `ie' values */
+ struct roffreg *regtab; /* number registers */
+ struct roffkv *strtab; /* user-defined strings & macros */
+ struct roffkv *xmbtab; /* multi-byte trans table (`tr') */
+ struct roffstr *xtab; /* single-byte trans table (`tr') */
+ const char *current_string; /* value of last called user macro */
+ struct tbl_node *first_tbl; /* first table parsed */
+ struct tbl_node *last_tbl; /* last table parsed */
+ struct tbl_node *tbl; /* current table being parsed */
+ struct eqn_node *last_eqn; /* last equation parsed */
+ struct eqn_node *first_eqn; /* first equation parsed */
+ struct eqn_node *eqn; /* current equation being parsed */
+ int eqn_inline; /* current equation is inline */
+ int options; /* parse options */
+ int rstacksz; /* current size limit of rstack */
int rstackpos; /* position in rstack */
- struct regset *regs; /* read/writable registers */
+ int format; /* current file in mdoc or man format */
+ int argc; /* number of args of the last macro */
+ char control; /* control character */
};
struct roffnode {
struct roffnode *parent; /* up one in stack */
int line; /* parse line */
int col; /* parse col */
+ char *name; /* node name, e.g. macro name */
char *end; /* end-rules: custom token */
int endspan; /* end-rules: next-line or infty */
- enum roffrule rule; /* current evaluation rule */
+ int rule; /* current evaluation rule */
};
#define ROFF_ARGS struct roff *r, /* parse ctx */ \
enum rofft tok, /* tok of macro */ \
- char **bufp, /* input buffer */ \
- size_t *szp, /* size of input buffer */ \
+ struct buf *buf, /* input buffer */ \
int ln, /* parse line */ \
int ppos, /* original pos in buffer */ \
int pos, /* current pos in buffer */ \
struct roffmac *next;
};
+struct predef {
+ const char *name; /* predefined input name */
+ const char *str; /* replacement symbol */
+};
+
+#define PREDEF(__name, __str) \
+ { (__name), (__str) },
+
+/* --- function prototypes ------------------------------------------------ */
+
+static enum rofft roffhash_find(const char *, size_t);
+static void roffhash_init(void);
+static void roffnode_cleanscope(struct roff *);
+static void roffnode_pop(struct roff *);
+static void roffnode_push(struct roff *, enum rofft,
+ const char *, int, int);
static enum rofferr roff_block(ROFF_ARGS);
static enum rofferr roff_block_text(ROFF_ARGS);
static enum rofferr roff_block_sub(ROFF_ARGS);
+static enum rofferr roff_brp(ROFF_ARGS);
static enum rofferr roff_cblock(ROFF_ARGS);
-static enum rofferr roff_ccond(ROFF_ARGS);
+static enum rofferr roff_cc(ROFF_ARGS);
+static void roff_ccond(struct roff *, int, int);
static enum rofferr roff_cond(ROFF_ARGS);
static enum rofferr roff_cond_text(ROFF_ARGS);
static enum rofferr roff_cond_sub(ROFF_ARGS);
-static enum rofferr roff_line(ROFF_ARGS);
+static enum rofferr roff_ds(ROFF_ARGS);
+static enum rofferr roff_eqndelim(struct roff *, struct buf *, int);
+static int roff_evalcond(struct roff *r, int, char *, int *);
+static int roff_evalnum(struct roff *, int,
+ const char *, int *, int *, int);
+static int roff_evalpar(struct roff *, int,
+ const char *, int *, int *, int);
+static int roff_evalstrcond(const char *, int *);
+static void roff_free1(struct roff *);
+static void roff_freereg(struct roffreg *);
+static void roff_freestr(struct roffkv *);
+static size_t roff_getname(struct roff *, char **, int, int);
+static int roff_getnum(const char *, int *, int *, int);
+static int roff_getop(const char *, int *, char *);
+static int roff_getregn(const struct roff *,
+ const char *, size_t);
+static int roff_getregro(const struct roff *,
+ const char *name);
+static const char *roff_getstrn(const struct roff *,
+ const char *, size_t);
+static int roff_hasregn(const struct roff *,
+ const char *, size_t);
+static enum rofferr roff_insec(ROFF_ARGS);
+static enum rofferr roff_it(ROFF_ARGS);
+static enum rofferr roff_line_ignore(ROFF_ARGS);
+static void roff_man_alloc1(struct roff_man *);
+static void roff_man_free1(struct roff_man *);
static enum rofferr roff_nr(ROFF_ARGS);
-static enum roffrule roff_evalcond(const char *, int *);
-
-/* See roff_hash_find() */
+static enum rofft roff_parse(struct roff *, char *, int *,
+ int, int);
+static enum rofferr roff_parsetext(struct buf *, int, int *);
+static enum rofferr roff_res(struct roff *, struct buf *, int, int);
+static enum rofferr roff_rm(ROFF_ARGS);
+static enum rofferr roff_rr(ROFF_ARGS);
+static void roff_setstr(struct roff *,
+ const char *, const char *, int);
+static void roff_setstrn(struct roffkv **, const char *,
+ size_t, const char *, size_t, int);
+static enum rofferr roff_so(ROFF_ARGS);
+static enum rofferr roff_tr(ROFF_ARGS);
+static enum rofferr roff_Dd(ROFF_ARGS);
+static enum rofferr roff_TH(ROFF_ARGS);
+static enum rofferr roff_TE(ROFF_ARGS);
+static enum rofferr roff_TS(ROFF_ARGS);
+static enum rofferr roff_EQ(ROFF_ARGS);
+static enum rofferr roff_EN(ROFF_ARGS);
+static enum rofferr roff_T_(ROFF_ARGS);
+static enum rofferr roff_unsupp(ROFF_ARGS);
+static enum rofferr roff_userdef(ROFF_ARGS);
+
+/* --- constant data ------------------------------------------------------ */
+
+/* See roffhash_find() */
#define ASCII_HI 126
#define ASCII_LO 33
#define HASHWIDTH (ASCII_HI - ASCII_LO + 1)
+#define ROFFNUM_SCALE (1 << 0) /* Honour scaling in roff_getnum(). */
+#define ROFFNUM_WHITE (1 << 1) /* Skip whitespace in roff_evalnum(). */
+
static struct roffmac *hash[HASHWIDTH];
static struct roffmac roffs[ROFF_MAX] = {
+ { "ab", roff_unsupp, NULL, NULL, 0, NULL },
+ { "ad", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "af", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "aln", roff_unsupp, NULL, NULL, 0, NULL },
+ { "als", roff_unsupp, NULL, NULL, 0, NULL },
{ "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
- { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
{ "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
+ { "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
+ { "ami1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
+ { "as", roff_ds, NULL, NULL, 0, NULL },
+ { "as1", roff_ds, NULL, NULL, 0, NULL },
+ { "asciify", roff_unsupp, NULL, NULL, 0, NULL },
+ { "backtrace", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "bd", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "bleedat", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "blm", roff_unsupp, NULL, NULL, 0, NULL },
+ { "box", roff_unsupp, NULL, NULL, 0, NULL },
+ { "boxa", roff_unsupp, NULL, NULL, 0, NULL },
+ { "bp", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "BP", roff_unsupp, NULL, NULL, 0, NULL },
+ { "break", roff_unsupp, NULL, NULL, 0, NULL },
+ { "breakchar", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "brnl", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "brp", roff_brp, NULL, NULL, 0, NULL },
+ { "brpnl", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "c2", roff_unsupp, NULL, NULL, 0, NULL },
+ { "cc", roff_cc, NULL, NULL, 0, NULL },
+ { "ce", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "cf", roff_insec, NULL, NULL, 0, NULL },
+ { "cflags", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ch", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "char", roff_unsupp, NULL, NULL, 0, NULL },
+ { "chop", roff_unsupp, NULL, NULL, 0, NULL },
+ { "class", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "close", roff_insec, NULL, NULL, 0, NULL },
+ { "CL", roff_unsupp, NULL, NULL, 0, NULL },
+ { "color", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "composite", roff_unsupp, NULL, NULL, 0, NULL },
+ { "continue", roff_unsupp, NULL, NULL, 0, NULL },
+ { "cp", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "cropat", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "cs", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "cu", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "da", roff_unsupp, NULL, NULL, 0, NULL },
+ { "dch", roff_unsupp, NULL, NULL, 0, NULL },
+ { "Dd", roff_Dd, NULL, NULL, 0, NULL },
{ "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
- { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
{ "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
- { "ds", roff_line, NULL, NULL, 0, NULL },
+ { "defcolor", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
+ { "dei1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
+ { "device", roff_unsupp, NULL, NULL, 0, NULL },
+ { "devicem", roff_unsupp, NULL, NULL, 0, NULL },
+ { "di", roff_unsupp, NULL, NULL, 0, NULL },
+ { "do", roff_unsupp, NULL, NULL, 0, NULL },
+ { "ds", roff_ds, NULL, NULL, 0, NULL },
+ { "ds1", roff_ds, NULL, NULL, 0, NULL },
+ { "dwh", roff_unsupp, NULL, NULL, 0, NULL },
+ { "dt", roff_unsupp, NULL, NULL, 0, NULL },
+ { "ec", roff_unsupp, NULL, NULL, 0, NULL },
+ { "ecr", roff_unsupp, NULL, NULL, 0, NULL },
+ { "ecs", roff_unsupp, NULL, NULL, 0, NULL },
{ "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
+ { "em", roff_unsupp, NULL, NULL, 0, NULL },
+ { "EN", roff_EN, NULL, NULL, 0, NULL },
+ { "eo", roff_unsupp, NULL, NULL, 0, NULL },
+ { "EP", roff_unsupp, NULL, NULL, 0, NULL },
+ { "EQ", roff_EQ, NULL, NULL, 0, NULL },
+ { "errprint", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ev", roff_unsupp, NULL, NULL, 0, NULL },
+ { "evc", roff_unsupp, NULL, NULL, 0, NULL },
+ { "ex", roff_unsupp, NULL, NULL, 0, NULL },
+ { "fallback", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fam", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fc", roff_unsupp, NULL, NULL, 0, NULL },
+ { "fchar", roff_unsupp, NULL, NULL, 0, NULL },
+ { "fcolor", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fdeferlig", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "feature", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fkern", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fl", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "flig", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fp", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fps", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fschar", roff_unsupp, NULL, NULL, 0, NULL },
+ { "fspacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fspecial", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ftr", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "fzoom", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "gcolor", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hc", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hcode", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hidechar", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hla", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hlm", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hpf", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hpfa", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hpfcode", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hw", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hy", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hylang", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hylen", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hym", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hypp", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "hys", roff_line_ignore, NULL, NULL, 0, NULL },
{ "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
{ "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
{ "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
- { "rm", roff_line, NULL, NULL, 0, NULL },
- { "tr", roff_line, NULL, NULL, 0, NULL },
- { ".", roff_cblock, NULL, NULL, 0, NULL },
- { "\\}", roff_ccond, NULL, NULL, 0, NULL },
+ { "index", roff_unsupp, NULL, NULL, 0, NULL },
+ { "it", roff_it, NULL, NULL, 0, NULL },
+ { "itc", roff_unsupp, NULL, NULL, 0, NULL },
+ { "IX", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "kern", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "kernafter", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "kernbefore", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "kernpair", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "lc", roff_unsupp, NULL, NULL, 0, NULL },
+ { "lc_ctype", roff_unsupp, NULL, NULL, 0, NULL },
+ { "lds", roff_unsupp, NULL, NULL, 0, NULL },
+ { "length", roff_unsupp, NULL, NULL, 0, NULL },
+ { "letadj", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "lf", roff_insec, NULL, NULL, 0, NULL },
+ { "lg", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "lhang", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "linetabs", roff_unsupp, NULL, NULL, 0, NULL },
+ { "lnr", roff_unsupp, NULL, NULL, 0, NULL },
+ { "lnrf", roff_unsupp, NULL, NULL, 0, NULL },
+ { "lpfx", roff_unsupp, NULL, NULL, 0, NULL },
+ { "ls", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "lsm", roff_unsupp, NULL, NULL, 0, NULL },
+ { "lt", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "mc", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "mediasize", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "minss", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "mk", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "mso", roff_insec, NULL, NULL, 0, NULL },
+ { "na", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ne", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "nh", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "nhychar", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "nm", roff_unsupp, NULL, NULL, 0, NULL },
+ { "nn", roff_unsupp, NULL, NULL, 0, NULL },
+ { "nop", roff_unsupp, NULL, NULL, 0, NULL },
{ "nr", roff_nr, NULL, NULL, 0, NULL },
+ { "nrf", roff_unsupp, NULL, NULL, 0, NULL },
+ { "nroff", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "nx", roff_insec, NULL, NULL, 0, NULL },
+ { "open", roff_insec, NULL, NULL, 0, NULL },
+ { "opena", roff_insec, NULL, NULL, 0, NULL },
+ { "os", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "output", roff_unsupp, NULL, NULL, 0, NULL },
+ { "padj", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "papersize", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "pc", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "pev", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "pi", roff_insec, NULL, NULL, 0, NULL },
+ { "PI", roff_unsupp, NULL, NULL, 0, NULL },
+ { "pl", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "pm", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "pn", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "pnr", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "po", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "psbb", roff_unsupp, NULL, NULL, 0, NULL },
+ { "pshape", roff_unsupp, NULL, NULL, 0, NULL },
+ { "pso", roff_insec, NULL, NULL, 0, NULL },
+ { "ptr", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "pvs", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "rchar", roff_unsupp, NULL, NULL, 0, NULL },
+ { "rd", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "recursionlimit", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "return", roff_unsupp, NULL, NULL, 0, NULL },
+ { "rfschar", roff_unsupp, NULL, NULL, 0, NULL },
+ { "rhang", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "rj", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "rm", roff_rm, NULL, NULL, 0, NULL },
+ { "rn", roff_unsupp, NULL, NULL, 0, NULL },
+ { "rnn", roff_unsupp, NULL, NULL, 0, NULL },
+ { "rr", roff_rr, NULL, NULL, 0, NULL },
+ { "rs", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "rt", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "schar", roff_unsupp, NULL, NULL, 0, NULL },
+ { "sentchar", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "shc", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "shift", roff_unsupp, NULL, NULL, 0, NULL },
+ { "sizes", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "so", roff_so, NULL, NULL, 0, NULL },
+ { "spacewidth", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "special", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "spreadwarn", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ss", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "sty", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "substring", roff_unsupp, NULL, NULL, 0, NULL },
+ { "sv", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "sy", roff_insec, NULL, NULL, 0, NULL },
+ { "T&", roff_T_, NULL, NULL, 0, NULL },
+ { "ta", roff_unsupp, NULL, NULL, 0, NULL },
+ { "tc", roff_unsupp, NULL, NULL, 0, NULL },
+ { "TE", roff_TE, NULL, NULL, 0, NULL },
+ { "TH", roff_TH, NULL, NULL, 0, NULL },
+ { "ti", roff_unsupp, NULL, NULL, 0, NULL },
+ { "tkf", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "tl", roff_unsupp, NULL, NULL, 0, NULL },
+ { "tm", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "tm1", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "tmc", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "tr", roff_tr, NULL, NULL, 0, NULL },
+ { "track", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "transchar", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "trf", roff_insec, NULL, NULL, 0, NULL },
+ { "trimat", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "trin", roff_unsupp, NULL, NULL, 0, NULL },
+ { "trnt", roff_unsupp, NULL, NULL, 0, NULL },
+ { "troff", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "TS", roff_TS, NULL, NULL, 0, NULL },
+ { "uf", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "ul", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "unformat", roff_unsupp, NULL, NULL, 0, NULL },
+ { "unwatch", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "unwatchn", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "vpt", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "vs", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "warn", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "warnscale", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "watch", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "watchlength", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "watchn", roff_line_ignore, NULL, NULL, 0, NULL },
+ { "wh", roff_unsupp, NULL, NULL, 0, NULL },
+ { "while", roff_unsupp, NULL, NULL, 0, NULL },
+ { "write", roff_insec, NULL, NULL, 0, NULL },
+ { "writec", roff_insec, NULL, NULL, 0, NULL },
+ { "writem", roff_insec, NULL, NULL, 0, NULL },
+ { "xflag", roff_line_ignore, NULL, NULL, 0, NULL },
+ { ".", roff_cblock, NULL, NULL, 0, NULL },
+ { NULL, roff_userdef, NULL, NULL, 0, NULL },
};
-static void roff_free1(struct roff *);
-static enum rofft roff_hash_find(const char *);
-static void roff_hash_init(void);
-static void roffnode_cleanscope(struct roff *);
-static int roffnode_push(struct roff *,
- enum rofft, int, int);
-static void roffnode_pop(struct roff *);
-static enum rofft roff_parse(const char *, int *);
-static int roff_parse_nat(const char *, int *);
+/* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */
+const char *const __mdoc_reserved[] = {
+ "Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",
+ "Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",
+ "Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",
+ "Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",
+ "Dt", "Dv", "Dx", "D1",
+ "Ec", "Ed", "Ef", "Ek", "El", "Em",
+ "En", "Eo", "Er", "Es", "Ev", "Ex",
+ "Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
+ "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
+ "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
+ "Oc", "Oo", "Op", "Os", "Ot", "Ox",
+ "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
+ "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
+ "Sc", "Sh", "Sm", "So", "Sq",
+ "Ss", "St", "Sx", "Sy",
+ "Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
+ "%A", "%B", "%C", "%D", "%I", "%J", "%N", "%O",
+ "%P", "%Q", "%R", "%T", "%U", "%V",
+ NULL
+};
+
+/* not currently implemented: BT DE DS ME MT PT SY TQ YS */
+const char *const __man_reserved[] = {
+ "AT", "B", "BI", "BR", "DT",
+ "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
+ "LP", "OP", "P", "PD", "PP",
+ "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
+ "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
+ NULL
+};
+
+/* Array of injected predefined strings. */
+#define PREDEFS_MAX 38
+static const struct predef predefs[PREDEFS_MAX] = {
+#include "predefs.in"
+};
-/* See roff_hash_find() */
+/* See roffhash_find() */
#define ROFF_HASH(p) (p[0] - ASCII_LO)
+static int roffit_lines; /* number of lines to delay */
+static char *roffit_macro; /* nil-terminated macro line */
+
+
+/* --- request table ------------------------------------------------------ */
+
static void
-roff_hash_init(void)
+roffhash_init(void)
{
struct roffmac *n;
int buc, i;
- for (i = 0; i < (int)ROFF_MAX; i++) {
+ for (i = 0; i < (int)ROFF_USERDEF; i++) {
assert(roffs[i].name[0] >= ASCII_LO);
assert(roffs[i].name[0] <= ASCII_HI);
}
}
-
/*
* Look up a roff token by its name. Returns ROFF_MAX if no macro by
* the nil-terminated string name could be found.
*/
static enum rofft
-roff_hash_find(const char *p)
+roffhash_find(const char *p, size_t s)
{
int buc;
struct roffmac *n;
*/
if (p[0] < ASCII_LO || p[0] > ASCII_HI)
- return(ROFF_MAX);
+ return ROFF_MAX;
buc = ROFF_HASH(p);
if (NULL == (n = hash[buc]))
- return(ROFF_MAX);
+ return ROFF_MAX;
for ( ; n; n = n->next)
- if (0 == strcmp(n->name, p))
- return((enum rofft)(n - roffs));
+ if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
+ return (enum rofft)(n - roffs);
- return(ROFF_MAX);
+ return ROFF_MAX;
}
+/* --- stack of request blocks -------------------------------------------- */
/*
* Pop the current node off of the stack of roff instructions currently
struct roffnode *p;
assert(r->last);
- p = r->last;
-
- if (ROFF_el == p->tok)
- if (r->rstackpos > -1)
- r->rstackpos--;
+ p = r->last;
r->last = r->last->parent;
- if (p->end)
- free(p->end);
+ free(p->name);
+ free(p->end);
free(p);
}
-
/*
* Push a roff node onto the instruction stack. This must later be
* removed with roffnode_pop().
*/
-static int
-roffnode_push(struct roff *r, enum rofft tok, int line, int col)
+static void
+roffnode_push(struct roff *r, enum rofft tok, const char *name,
+ int line, int col)
{
struct roffnode *p;
- if (NULL == (p = calloc(1, sizeof(struct roffnode)))) {
- (*r->msg)(MANDOCERR_MEM, r->data, line, col, NULL);
- return(0);
- }
-
+ p = mandoc_calloc(1, sizeof(struct roffnode));
p->tok = tok;
+ if (name)
+ p->name = mandoc_strdup(name);
p->parent = r->last;
p->line = line;
p->col = col;
- p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY;
+ p->rule = p->parent ? p->parent->rule : 0;
r->last = p;
- return(1);
}
+/* --- roff parser state data management ---------------------------------- */
static void
roff_free1(struct roff *r)
{
+ struct tbl_node *tbl;
+ struct eqn_node *e;
+ int i;
+
+ while (NULL != (tbl = r->first_tbl)) {
+ r->first_tbl = tbl->next;
+ tbl_free(tbl);
+ }
+ r->first_tbl = r->last_tbl = r->tbl = NULL;
+
+ while (NULL != (e = r->first_eqn)) {
+ r->first_eqn = e->next;
+ eqn_free(e);
+ }
+ r->first_eqn = r->last_eqn = r->eqn = NULL;
while (r->last)
roffnode_pop(r);
-}
+ free (r->rstack);
+ r->rstack = NULL;
+ r->rstacksz = 0;
+ r->rstackpos = -1;
+
+ roff_freereg(r->regtab);
+ r->regtab = NULL;
+
+ roff_freestr(r->strtab);
+ roff_freestr(r->xmbtab);
+ r->strtab = r->xmbtab = NULL;
+
+ if (r->xtab)
+ for (i = 0; i < 128; i++)
+ free(r->xtab[i].p);
+ free(r->xtab);
+ r->xtab = NULL;
+}
void
roff_reset(struct roff *r)
{
roff_free1(r);
+ r->format = r->options & (MPARSE_MDOC | MPARSE_MAN);
+ r->control = 0;
}
-
void
roff_free(struct roff *r)
{
free(r);
}
-
struct roff *
-roff_alloc(struct regset *regs, const mandocmsg msg, void *data)
+roff_alloc(struct mparse *parse, int options)
{
struct roff *r;
- if (NULL == (r = calloc(1, sizeof(struct roff)))) {
- (*msg)(MANDOCERR_MEM, data, 0, 0, NULL);
- return(0);
- }
-
- r->regs = regs;
- r->msg = msg;
- r->data = data;
+ r = mandoc_calloc(1, sizeof(struct roff));
+ r->parse = parse;
+ r->options = options;
+ r->format = options & (MPARSE_MDOC | MPARSE_MAN);
r->rstackpos = -1;
-
- roff_hash_init();
- return(r);
-}
-
-
-enum rofferr
-roff_parseln(struct roff *r, int ln, char **bufp,
- size_t *szp, int pos, int *offs)
-{
- enum rofft t;
- int ppos;
-
- /*
- * First, if a scope is open and we're not a macro, pass the
- * text through the macro's filter. If a scope isn't open and
- * we're not a macro, just let it through.
- */
-
- if (r->last && ! ROFF_CTL((*bufp)[pos])) {
- t = r->last->tok;
- assert(roffs[t].text);
- ROFF_DEBUG("roff: intercept scoped text: %s, [%s]\n",
- roffs[t].name, &(*bufp)[pos]);
- return((*roffs[t].text)
- (r, t, bufp, szp,
- ln, pos, pos, offs));
- } else if ( ! ROFF_CTL((*bufp)[pos])) {
- ROFF_DEBUG("roff: pass non-scoped text: [%s]\n",
- &(*bufp)[pos]);
- return(ROFF_CONT);
- }
-
- /*
- * If a scope is open, go to the child handler for that macro,
- * as it may want to preprocess before doing anything with it.
- */
-
- if (r->last) {
- t = r->last->tok;
- assert(roffs[t].sub);
- ROFF_DEBUG("roff: intercept scoped context: %s\n",
- roffs[t].name);
- return((*roffs[t].sub)
- (r, t, bufp, szp,
- ln, pos, pos, offs));
- }
-
- /*
- * Lastly, as we've no scope open, try to look up and execute
- * the new macro. If no macro is found, simply return and let
- * the compilers handle it.
- */
- ppos = pos;
- if (ROFF_MAX == (t = roff_parse(*bufp, &pos))) {
- ROFF_DEBUG("roff: pass non-scoped non-macro: [%s]\n",
- &(*bufp)[pos]);
- return(ROFF_CONT);
- }
+ roffhash_init();
- ROFF_DEBUG("roff: intercept new-scope: %s, [%s]\n",
- roffs[t].name, &(*bufp)[pos]);
- assert(roffs[t].proc);
- return((*roffs[t].proc)
- (r, t, bufp, szp,
- ln, ppos, pos, offs));
+ return r;
}
+/* --- syntax tree state data management ---------------------------------- */
-int
-roff_endparse(struct roff *r)
+static void
+roff_man_free1(struct roff_man *man)
{
- if (NULL == r->last)
- return(1);
- return((*r->msg)(MANDOCERR_SCOPEEXIT, r->data, r->last->line,
- r->last->col, NULL));
+ if (man->first != NULL)
+ roff_node_delete(man, man->first);
+ free(man->meta.msec);
+ free(man->meta.vol);
+ free(man->meta.os);
+ free(man->meta.arch);
+ free(man->meta.title);
+ free(man->meta.name);
+ free(man->meta.date);
}
-
-/*
- * Parse a roff node's type from the input buffer. This must be in the
- * form of ".foo xxx" in the usual way.
- */
-static enum rofft
-roff_parse(const char *buf, int *pos)
+static void
+roff_man_alloc1(struct roff_man *man)
{
- int j;
- char mac[5];
- enum rofft t;
-
- assert(ROFF_CTL(buf[*pos]));
- (*pos)++;
-
- while (buf[*pos] && (' ' == buf[*pos] || '\t' == buf[*pos]))
- (*pos)++;
-
- if ('\0' == buf[*pos])
- return(ROFF_MAX);
- for (j = 0; j < 4; j++, (*pos)++)
- if ('\0' == (mac[j] = buf[*pos]))
- break;
- else if (' ' == buf[*pos] || (j && '\\' == buf[*pos]))
- break;
-
- if (j == 4 || j < 1)
- return(ROFF_MAX);
-
- mac[j] = '\0';
-
- if (ROFF_MAX == (t = roff_hash_find(mac)))
- return(t);
+ memset(&man->meta, 0, sizeof(man->meta));
+ man->first = mandoc_calloc(1, sizeof(*man->first));
+ man->first->type = ROFFT_ROOT;
+ man->last = man->first;
+ man->last_es = NULL;
+ man->flags = 0;
+ man->macroset = MACROSET_NONE;
+ man->lastsec = man->lastnamed = SEC_NONE;
+ man->next = ROFF_NEXT_CHILD;
+}
- while (buf[*pos] && ' ' == buf[*pos])
- (*pos)++;
+void
+roff_man_reset(struct roff_man *man)
+{
- return(t);
+ roff_man_free1(man);
+ roff_man_alloc1(man);
}
-
-static int
-roff_parse_nat(const char *buf, int *res)
+void
+roff_man_free(struct roff_man *man)
{
- char *ep;
- long lval;
- errno = 0;
- lval = strtol(buf, &ep, 10);
- if (buf[0] == '\0' || *ep != '\0')
- return(0);
- if ((errno == ERANGE &&
- (lval == LONG_MAX || lval == LONG_MIN)) ||
- (lval > INT_MAX || lval <= 0))
- return(0);
+ roff_man_free1(man);
+ free(man);
+}
- *res = (int)lval;
- return(1);
+struct roff_man *
+roff_man_alloc(struct roff *roff, struct mparse *parse,
+ const char *defos, int quick)
+{
+ struct roff_man *man;
+
+ man = mandoc_calloc(1, sizeof(*man));
+ man->parse = parse;
+ man->roff = roff;
+ man->defos = defos;
+ man->quick = quick;
+ roff_man_alloc1(man);
+ return man;
}
+/* --- syntax tree handling ----------------------------------------------- */
-/* ARGSUSED */
-static enum rofferr
-roff_cblock(ROFF_ARGS)
+struct roff_node *
+roff_node_alloc(struct roff_man *man, int line, int pos,
+ enum roff_type type, int tok)
{
+ struct roff_node *n;
+
+ n = mandoc_calloc(1, sizeof(*n));
+ n->line = line;
+ n->pos = pos;
+ n->tok = tok;
+ n->type = type;
+ n->sec = man->lastsec;
+
+ if (man->flags & MDOC_SYNOPSIS)
+ n->flags |= MDOC_SYNPRETTY;
+ else
+ n->flags &= ~MDOC_SYNPRETTY;
+ if (man->flags & MDOC_NEWLINE)
+ n->flags |= MDOC_LINE;
+ man->flags &= ~MDOC_NEWLINE;
+
+ return n;
+}
- /*
- * A block-close `..' should only be invoked as a child of an
- * ignore macro, otherwise raise a warning and just ignore it.
- */
+void
+roff_node_append(struct roff_man *man, struct roff_node *n)
+{
- if (NULL == r->last) {
- if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL))
- return(ROFF_ERR);
- return(ROFF_IGN);
+ switch (man->next) {
+ case ROFF_NEXT_SIBLING:
+ if (man->last->next != NULL) {
+ n->next = man->last->next;
+ man->last->next->prev = n;
+ } else
+ man->last->parent->last = n;
+ man->last->next = n;
+ n->prev = man->last;
+ n->parent = man->last->parent;
+ break;
+ case ROFF_NEXT_CHILD:
+ man->last->child = n;
+ n->parent = man->last;
+ n->parent->last = n;
+ break;
+ default:
+ abort();
}
+ man->last = n;
- switch (r->last->tok) {
- case (ROFF_am):
- /* FALLTHROUGH */
- case (ROFF_ami):
- /* FALLTHROUGH */
- case (ROFF_am1):
- /* FALLTHROUGH */
- case (ROFF_de):
- /* FALLTHROUGH */
- case (ROFF_dei):
- /* FALLTHROUGH */
- case (ROFF_de1):
- /* FALLTHROUGH */
- case (ROFF_ig):
+ switch (n->type) {
+ case ROFFT_HEAD:
+ n->parent->head = n;
+ break;
+ case ROFFT_BODY:
+ if (n->end != ENDBODY_NOT)
+ return;
+ n->parent->body = n;
+ break;
+ case ROFFT_TAIL:
+ n->parent->tail = n;
break;
default:
- if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL))
- return(ROFF_ERR);
- return(ROFF_IGN);
+ return;
}
- if ((*bufp)[pos])
- if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL))
- return(ROFF_ERR);
-
- roffnode_pop(r);
- roffnode_cleanscope(r);
- return(ROFF_IGN);
+ /*
+ * Copy over the normalised-data pointer of our parent. Not
+ * everybody has one, but copying a null pointer is fine.
+ */
+ n->norm = n->parent->norm;
+ assert(n->parent->type == ROFFT_BLOCK);
}
-
-static void
-roffnode_cleanscope(struct roff *r)
+void
+roff_word_alloc(struct roff_man *man, int line, int pos, const char *word)
{
-
- while (r->last) {
- if (--r->last->endspan < 0)
- break;
- roffnode_pop(r);
- }
+ struct roff_node *n;
+
+ n = roff_node_alloc(man, line, pos, ROFFT_TEXT, TOKEN_NONE);
+ n->string = roff_strdup(man->roff, word);
+ roff_node_append(man, n);
+ if (man->macroset == MACROSET_MDOC)
+ n->flags |= MDOC_VALID | MDOC_ENDED;
+ else
+ n->flags |= MAN_VALID;
+ man->next = ROFF_NEXT_SIBLING;
}
+void
+roff_word_append(struct roff_man *man, const char *word)
+{
+ struct roff_node *n;
+ char *addstr, *newstr;
+
+ n = man->last;
+ addstr = roff_strdup(man->roff, word);
+ mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
+ free(addstr);
+ free(n->string);
+ n->string = newstr;
+ man->next = ROFF_NEXT_SIBLING;
+}
-/* ARGSUSED */
-static enum rofferr
-roff_ccond(ROFF_ARGS)
+void
+roff_elem_alloc(struct roff_man *man, int line, int pos, int tok)
{
+ struct roff_node *n;
- if (NULL == r->last) {
- if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL))
- return(ROFF_ERR);
- return(ROFF_IGN);
- }
+ n = roff_node_alloc(man, line, pos, ROFFT_ELEM, tok);
+ roff_node_append(man, n);
+ man->next = ROFF_NEXT_CHILD;
+}
- switch (r->last->tok) {
- case (ROFF_el):
- /* FALLTHROUGH */
- case (ROFF_ie):
- /* FALLTHROUGH */
- case (ROFF_if):
- break;
- default:
- if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL))
- return(ROFF_ERR);
- return(ROFF_IGN);
- }
+struct roff_node *
+roff_block_alloc(struct roff_man *man, int line, int pos, int tok)
+{
+ struct roff_node *n;
- if (r->last->endspan > -1) {
- if ( ! (*r->msg)(MANDOCERR_NOSCOPE, r->data, ln, ppos, NULL))
- return(ROFF_ERR);
- return(ROFF_IGN);
- }
+ n = roff_node_alloc(man, line, pos, ROFFT_BLOCK, tok);
+ roff_node_append(man, n);
+ man->next = ROFF_NEXT_CHILD;
+ return n;
+}
- if ((*bufp)[pos])
- if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL))
- return(ROFF_ERR);
+struct roff_node *
+roff_head_alloc(struct roff_man *man, int line, int pos, int tok)
+{
+ struct roff_node *n;
- roffnode_pop(r);
- roffnode_cleanscope(r);
- return(ROFF_IGN);
+ n = roff_node_alloc(man, line, pos, ROFFT_HEAD, tok);
+ roff_node_append(man, n);
+ man->next = ROFF_NEXT_CHILD;
+ return n;
}
-
-/* ARGSUSED */
-static enum rofferr
-roff_block(ROFF_ARGS)
+struct roff_node *
+roff_body_alloc(struct roff_man *man, int line, int pos, int tok)
{
- int sv;
- size_t sz;
-
- if (ROFF_ig != tok && '\0' == (*bufp)[pos]) {
- if ( ! (*r->msg)(MANDOCERR_NOARGS, r->data, ln, ppos, NULL))
- return(ROFF_ERR);
- return(ROFF_IGN);
- } else if (ROFF_ig != tok) {
- while ((*bufp)[pos] && ' ' != (*bufp)[pos])
- pos++;
- while (' ' == (*bufp)[pos])
- pos++;
- }
+ struct roff_node *n;
- if ( ! roffnode_push(r, tok, ln, ppos))
- return(ROFF_ERR);
+ n = roff_node_alloc(man, line, pos, ROFFT_BODY, tok);
+ roff_node_append(man, n);
+ man->next = ROFF_NEXT_CHILD;
+ return n;
+}
- if ('\0' == (*bufp)[pos])
- return(ROFF_IGN);
+void
+roff_addeqn(struct roff_man *man, const struct eqn *eqn)
+{
+ struct roff_node *n;
+
+ n = roff_node_alloc(man, eqn->ln, eqn->pos, ROFFT_EQN, TOKEN_NONE);
+ n->eqn = eqn;
+ if (eqn->ln > man->last->line)
+ n->flags |= MDOC_LINE;
+ roff_node_append(man, n);
+ man->next = ROFF_NEXT_SIBLING;
+}
- sv = pos;
- while ((*bufp)[pos] && ' ' != (*bufp)[pos] &&
- '\t' != (*bufp)[pos])
- pos++;
+void
+roff_addtbl(struct roff_man *man, const struct tbl_span *tbl)
+{
+ struct roff_node *n;
+
+ if (man->macroset == MACROSET_MAN)
+ man_breakscope(man, TOKEN_NONE);
+ n = roff_node_alloc(man, tbl->line, 0, ROFFT_TBL, TOKEN_NONE);
+ n->span = tbl;
+ roff_node_append(man, n);
+ if (man->macroset == MACROSET_MDOC)
+ n->flags |= MDOC_VALID | MDOC_ENDED;
+ else
+ n->flags |= MAN_VALID;
+ man->next = ROFF_NEXT_SIBLING;
+}
- /*
- * Note: groff does NOT like escape characters in the input.
- * Instead of detecting this, we're just going to let it fly and
- * to hell with it.
- */
+void
+roff_node_unlink(struct roff_man *man, struct roff_node *n)
+{
- assert(pos > sv);
- sz = (size_t)(pos - sv);
+ /* Adjust siblings. */
- if (1 == sz && '.' == (*bufp)[sv])
- return(ROFF_IGN);
+ if (n->prev)
+ n->prev->next = n->next;
+ if (n->next)
+ n->next->prev = n->prev;
- r->last->end = malloc(sz + 1);
+ /* Adjust parent. */
- if (NULL == r->last->end) {
- (*r->msg)(MANDOCERR_MEM, r->data, ln, pos, NULL);
- return(ROFF_ERR);
+ if (n->parent != NULL) {
+ if (n->parent->child == n)
+ n->parent->child = n->next;
+ if (n->parent->last == n)
+ n->parent->last = n->prev;
}
- memcpy(r->last->end, *bufp + sv, sz);
- r->last->end[(int)sz] = '\0';
+ /* Adjust parse point. */
+
+ if (man == NULL)
+ return;
+ if (man->last == n) {
+ if (n->prev == NULL) {
+ man->last = n->parent;
+ man->next = ROFF_NEXT_CHILD;
+ } else {
+ man->last = n->prev;
+ man->next = ROFF_NEXT_SIBLING;
+ }
+ }
+ if (man->first == n)
+ man->first = NULL;
+}
- if ((*bufp)[pos])
- if ( ! (*r->msg)(MANDOCERR_ARGSLOST, r->data, ln, pos, NULL))
- return(ROFF_ERR);
+void
+roff_node_free(struct roff_node *n)
+{
- return(ROFF_IGN);
+ if (n->args != NULL)
+ mdoc_argv_free(n->args);
+ if (n->type == ROFFT_BLOCK || n->type == ROFFT_ELEM)
+ free(n->norm);
+ free(n->string);
+ free(n);
}
-
-/* ARGSUSED */
-static enum rofferr
-roff_block_sub(ROFF_ARGS)
+void
+roff_node_delete(struct roff_man *man, struct roff_node *n)
{
- enum rofft t;
- int i, j;
- /*
- * First check whether a custom macro exists at this level. If
- * it does, then check against it. This is some of groff's
- * stranger behaviours. If we encountered a custom end-scope
- * tag and that tag also happens to be a "real" macro, then we
- * need to try interpreting it again as a real macro. If it's
- * not, then return ignore. Else continue.
- */
+ while (n->child != NULL)
+ roff_node_delete(man, n->child);
+ roff_node_unlink(man, n);
+ roff_node_free(n);
+}
- if (r->last->end) {
- i = pos + 1;
- while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
- i++;
+void
+deroff(char **dest, const struct roff_node *n)
+{
+ char *cp;
+ size_t sz;
- for (j = 0; r->last->end[j]; j++, i++)
- if ((*bufp)[i] != r->last->end[j])
- break;
+ if (n->type != ROFFT_TEXT) {
+ for (n = n->child; n != NULL; n = n->next)
+ deroff(dest, n);
+ return;
+ }
- if ('\0' == r->last->end[j] &&
- ('\0' == (*bufp)[i] ||
- ' ' == (*bufp)[i] ||
- '\t' == (*bufp)[i])) {
- roffnode_pop(r);
- roffnode_cleanscope(r);
+ /* Skip leading whitespace and escape sequences. */
- if (ROFF_MAX != roff_parse(*bufp, &pos))
- return(ROFF_RERUN);
- return(ROFF_IGN);
- }
+ cp = n->string;
+ while (*cp != '\0') {
+ if ('\\' == *cp) {
+ cp++;
+ mandoc_escape((const char **)&cp, NULL, NULL);
+ } else if (isspace((unsigned char)*cp))
+ cp++;
+ else
+ break;
}
- /*
- * If we have no custom end-query or lookup failed, then try
- * pulling it out of the hashtable.
- */
-
- ppos = pos;
- t = roff_parse(*bufp, &pos);
+ /* Skip trailing whitespace. */
- /* If we're not a comment-end, then throw it away. */
- if (ROFF_cblock != t)
- return(ROFF_IGN);
+ for (sz = strlen(cp); sz; sz--)
+ if ( ! isspace((unsigned char)cp[sz-1]))
+ break;
- assert(roffs[t].proc);
- return((*roffs[t].proc)(r, t, bufp, szp,
- ln, ppos, pos, offs));
-}
+ /* Skip empty strings. */
+ if (sz == 0)
+ return;
-/* ARGSUSED */
-static enum rofferr
-roff_block_text(ROFF_ARGS)
-{
+ if (*dest == NULL) {
+ *dest = mandoc_strndup(cp, sz);
+ return;
+ }
- return(ROFF_IGN);
+ mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
+ free(*dest);
+ *dest = cp;
}
+/* --- main functions of the roff parser ---------------------------------- */
-/* ARGSUSED */
+/*
+ * In the current line, expand escape sequences that tend to get
+ * used in numerical expressions and conditional requests.
+ * Also check the syntax of the remaining escape sequences.
+ */
static enum rofferr
-roff_cond_sub(ROFF_ARGS)
+roff_res(struct roff *r, struct buf *buf, int ln, int pos)
{
- enum rofft t;
- enum roffrule rr;
- struct roffnode *l;
+ char ubuf[24]; /* buffer to print the number */
+ const char *start; /* start of the string to process */
+ char *stesc; /* start of an escape sequence ('\\') */
+ const char *stnam; /* start of the name, after "[(*" */
+ const char *cp; /* end of the name, e.g. before ']' */
+ const char *res; /* the string to be substituted */
+ char *nbuf; /* new buffer to copy buf->buf to */
+ size_t maxl; /* expected length of the escape name */
+ size_t naml; /* actual length of the escape name */
+ enum mandoc_esc esc; /* type of the escape sequence */
+ int inaml; /* length returned from mandoc_escape() */
+ int expand_count; /* to avoid infinite loops */
+ int npos; /* position in numeric expression */
+ int arg_complete; /* argument not interrupted by eol */
+ char term; /* character terminating the escape */
+
+ expand_count = 0;
+ start = buf->buf + pos;
+ stesc = strchr(start, '\0') - 1;
+ while (stesc-- > start) {
+
+ /* Search backwards for the next backslash. */
+
+ if (*stesc != '\\')
+ continue;
+
+ /* If it is escaped, skip it. */
+
+ for (cp = stesc - 1; cp >= start; cp--)
+ if (*cp != '\\')
+ break;
- ppos = pos;
- rr = r->last->rule;
+ if ((stesc - cp) % 2 == 0) {
+ stesc = (char *)cp;
+ continue;
+ }
- /*
- * Clean out scope. If we've closed ourselves, then don't
- * continue.
- */
+ /* Decide whether to expand or to check only. */
- l = r->last;
- roffnode_cleanscope(r);
+ term = '\0';
+ cp = stesc + 1;
+ switch (*cp) {
+ case '*':
+ res = NULL;
+ break;
+ case 'B':
+ case 'w':
+ term = cp[1];
+ /* FALLTHROUGH */
+ case 'n':
+ res = ubuf;
+ break;
+ default:
+ esc = mandoc_escape(&cp, &stnam, &inaml);
+ if (esc == ESCAPE_ERROR ||
+ (esc == ESCAPE_SPECIAL &&
+ mchars_spec2cp(stnam, inaml) < 0))
+ mandoc_vmsg(MANDOCERR_ESC_BAD,
+ r->parse, ln, (int)(stesc - buf->buf),
+ "%.*s", (int)(cp - stesc), stesc);
+ continue;
+ }
- if (l != r->last)
- return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
+ if (EXPAND_LIMIT < ++expand_count) {
+ mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
+ ln, (int)(stesc - buf->buf), NULL);
+ return ROFF_IGN;
+ }
- if (ROFF_MAX == (t = roff_parse(*bufp, &pos)))
- return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
+ /*
+ * The third character decides the length
+ * of the name of the string or register.
+ * Save a pointer to the name.
+ */
- /*
- * A denied conditional must evaluate its children if and only
- * if they're either structurally required (such as loops and
- * conditionals) or a closing macro.
- */
- if (ROFFRULE_DENY == rr)
- if ( ! (ROFFMAC_STRUCT & roffs[t].flags))
- if (ROFF_ccond != t)
- return(ROFF_IGN);
+ if (term == '\0') {
+ switch (*++cp) {
+ case '\0':
+ maxl = 0;
+ break;
+ case '(':
+ cp++;
+ maxl = 2;
+ break;
+ case '[':
+ cp++;
+ term = ']';
+ maxl = 0;
+ break;
+ default:
+ maxl = 1;
+ break;
+ }
+ } else {
+ cp += 2;
+ maxl = 0;
+ }
+ stnam = cp;
+
+ /* Advance to the end of the name. */
+
+ naml = 0;
+ arg_complete = 1;
+ while (maxl == 0 || naml < maxl) {
+ if (*cp == '\0') {
+ mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
+ ln, (int)(stesc - buf->buf), stesc);
+ arg_complete = 0;
+ break;
+ }
+ if (maxl == 0 && *cp == term) {
+ cp++;
+ break;
+ }
+ if (*cp++ != '\\' || stesc[1] != 'w') {
+ naml++;
+ continue;
+ }
+ switch (mandoc_escape(&cp, NULL, NULL)) {
+ case ESCAPE_SPECIAL:
+ case ESCAPE_UNICODE:
+ case ESCAPE_NUMBERED:
+ case ESCAPE_OVERSTRIKE:
+ naml++;
+ break;
+ default:
+ break;
+ }
+ }
+
+ /*
+ * Retrieve the replacement string; if it is
+ * undefined, resume searching for escapes.
+ */
+
+ switch (stesc[1]) {
+ case '*':
+ if (arg_complete)
+ res = roff_getstrn(r, stnam, naml);
+ break;
+ case 'B':
+ npos = 0;
+ ubuf[0] = arg_complete &&
+ roff_evalnum(r, ln, stnam, &npos,
+ NULL, ROFFNUM_SCALE) &&
+ stnam + npos + 1 == cp ? '1' : '0';
+ ubuf[1] = '\0';
+ break;
+ case 'n':
+ if (arg_complete)
+ (void)snprintf(ubuf, sizeof(ubuf), "%d",
+ roff_getregn(r, stnam, naml));
+ else
+ ubuf[0] = '\0';
+ break;
+ case 'w':
+ /* use even incomplete args */
+ (void)snprintf(ubuf, sizeof(ubuf), "%d",
+ 24 * (int)naml);
+ break;
+ }
+
+ if (res == NULL) {
+ mandoc_vmsg(MANDOCERR_STR_UNDEF,
+ r->parse, ln, (int)(stesc - buf->buf),
+ "%.*s", (int)naml, stnam);
+ res = "";
+ } else if (buf->sz + strlen(res) > SHRT_MAX) {
+ mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
+ ln, (int)(stesc - buf->buf), NULL);
+ return ROFF_IGN;
+ }
+
+ /* Replace the escape sequence by the string. */
+
+ *stesc = '\0';
+ buf->sz = mandoc_asprintf(&nbuf, "%s%s%s",
+ buf->buf, res, cp) + 1;
+
+ /* Prepare for the next replacement. */
+
+ start = nbuf + pos;
+ stesc = nbuf + (stesc - buf->buf) + strlen(res);
+ free(buf->buf);
+ buf->buf = nbuf;
+ }
+ return ROFF_CONT;
+}
+
+/*
+ * Process text streams.
+ */
+static enum rofferr
+roff_parsetext(struct buf *buf, int pos, int *offs)
+{
+ size_t sz;
+ const char *start;
+ char *p;
+ int isz;
+ enum mandoc_esc esc;
+
+ /* Spring the input line trap. */
+
+ if (roffit_lines == 1) {
+ isz = mandoc_asprintf(&p, "%s\n.%s", buf->buf, roffit_macro);
+ free(buf->buf);
+ buf->buf = p;
+ buf->sz = isz + 1;
+ *offs = 0;
+ free(roffit_macro);
+ roffit_lines = 0;
+ return ROFF_REPARSE;
+ } else if (roffit_lines > 1)
+ --roffit_lines;
+
+ /* Convert all breakable hyphens into ASCII_HYPH. */
+
+ start = p = buf->buf + pos;
+
+ while (*p != '\0') {
+ sz = strcspn(p, "-\\");
+ p += sz;
+
+ if (*p == '\0')
+ break;
+
+ if (*p == '\\') {
+ /* Skip over escapes. */
+ p++;
+ esc = mandoc_escape((const char **)&p, NULL, NULL);
+ if (esc == ESCAPE_ERROR)
+ break;
+ while (*p == '-')
+ p++;
+ continue;
+ } else if (p == start) {
+ p++;
+ continue;
+ }
+
+ if (isalpha((unsigned char)p[-1]) &&
+ isalpha((unsigned char)p[1]))
+ *p = ASCII_HYPH;
+ p++;
+ }
+ return ROFF_CONT;
+}
+
+enum rofferr
+roff_parseln(struct roff *r, int ln, struct buf *buf, int *offs)
+{
+ enum rofft t;
+ enum rofferr e;
+ int pos; /* parse point */
+ int spos; /* saved parse point for messages */
+ int ppos; /* original offset in buf->buf */
+ int ctl; /* macro line (boolean) */
+
+ ppos = pos = *offs;
+
+ /* Handle in-line equation delimiters. */
+
+ if (r->tbl == NULL &&
+ r->last_eqn != NULL && r->last_eqn->delim &&
+ (r->eqn == NULL || r->eqn_inline)) {
+ e = roff_eqndelim(r, buf, pos);
+ if (e == ROFF_REPARSE)
+ return e;
+ assert(e == ROFF_CONT);
+ }
+
+ /* Expand some escape sequences. */
+
+ e = roff_res(r, buf, ln, pos);
+ if (e == ROFF_IGN)
+ return e;
+ assert(e == ROFF_CONT);
+
+ ctl = roff_getcontrol(r, buf->buf, &pos);
+
+ /*
+ * First, if a scope is open and we're not a macro, pass the
+ * text through the macro's filter.
+ * Equations process all content themselves.
+ * Tables process almost all content themselves, but we want
+ * to warn about macros before passing it there.
+ */
+
+ if (r->last != NULL && ! ctl) {
+ t = r->last->tok;
+ assert(roffs[t].text);
+ e = (*roffs[t].text)(r, t, buf, ln, pos, pos, offs);
+ assert(e == ROFF_IGN || e == ROFF_CONT);
+ if (e != ROFF_CONT)
+ return e;
+ }
+ if (r->eqn != NULL)
+ return eqn_read(&r->eqn, ln, buf->buf, ppos, offs);
+ if (r->tbl != NULL && ( ! ctl || buf->buf[pos] == '\0'))
+ return tbl_read(r->tbl, ln, buf->buf, ppos);
+ if ( ! ctl)
+ return roff_parsetext(buf, pos, offs);
+
+ /* Skip empty request lines. */
+
+ if (buf->buf[pos] == '"') {
+ mandoc_msg(MANDOCERR_COMMENT_BAD, r->parse,
+ ln, pos, NULL);
+ return ROFF_IGN;
+ } else if (buf->buf[pos] == '\0')
+ return ROFF_IGN;
+
+ /*
+ * If a scope is open, go to the child handler for that macro,
+ * as it may want to preprocess before doing anything with it.
+ * Don't do so if an equation is open.
+ */
+
+ if (r->last) {
+ t = r->last->tok;
+ assert(roffs[t].sub);
+ return (*roffs[t].sub)(r, t, buf, ln, ppos, pos, offs);
+ }
+
+ /* No scope is open. This is a new request or macro. */
+
+ spos = pos;
+ t = roff_parse(r, buf->buf, &pos, ln, ppos);
+
+ /* Tables ignore most macros. */
+
+ if (r->tbl != NULL && (t == ROFF_MAX || t == ROFF_TS)) {
+ mandoc_msg(MANDOCERR_TBLMACRO, r->parse,
+ ln, pos, buf->buf + spos);
+ if (t == ROFF_TS)
+ return ROFF_IGN;
+ while (buf->buf[pos] != '\0' && buf->buf[pos] != ' ')
+ pos++;
+ while (buf->buf[pos] != '\0' && buf->buf[pos] == ' ')
+ pos++;
+ return tbl_read(r->tbl, ln, buf->buf, pos);
+ }
+
+ /*
+ * This is neither a roff request nor a user-defined macro.
+ * Let the standard macro set parsers handle it.
+ */
+
+ if (t == ROFF_MAX)
+ return ROFF_CONT;
+
+ /* Execute a roff request or a user defined macro. */
+
+ assert(roffs[t].proc);
+ return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
+}
+
+void
+roff_endparse(struct roff *r)
+{
+
+ if (r->last)
+ mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
+ r->last->line, r->last->col,
+ roffs[r->last->tok].name);
+
+ if (r->eqn) {
+ mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
+ r->eqn->eqn.ln, r->eqn->eqn.pos, "EQ");
+ eqn_end(&r->eqn);
+ }
+
+ if (r->tbl) {
+ mandoc_msg(MANDOCERR_BLK_NOEND, r->parse,
+ r->tbl->line, r->tbl->pos, "TS");
+ tbl_end(&r->tbl);
+ }
+}
+
+/*
+ * Parse a roff node's type from the input buffer. This must be in the
+ * form of ".foo xxx" in the usual way.
+ */
+static enum rofft
+roff_parse(struct roff *r, char *buf, int *pos, int ln, int ppos)
+{
+ char *cp;
+ const char *mac;
+ size_t maclen;
+ enum rofft t;
+
+ cp = buf + *pos;
+
+ if ('\0' == *cp || '"' == *cp || '\t' == *cp || ' ' == *cp)
+ return ROFF_MAX;
+
+ mac = cp;
+ maclen = roff_getname(r, &cp, ln, ppos);
+
+ t = (r->current_string = roff_getstrn(r, mac, maclen))
+ ? ROFF_USERDEF : roffhash_find(mac, maclen);
+
+ if (ROFF_MAX != t)
+ *pos = cp - buf;
+
+ return t;
+}
+
+/* --- handling of request blocks ----------------------------------------- */
+
+static enum rofferr
+roff_cblock(ROFF_ARGS)
+{
+
+ /*
+ * A block-close `..' should only be invoked as a child of an
+ * ignore macro, otherwise raise a warning and just ignore it.
+ */
+
+ if (r->last == NULL) {
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
+ ln, ppos, "..");
+ return ROFF_IGN;
+ }
+
+ switch (r->last->tok) {
+ case ROFF_am:
+ /* ROFF_am1 is remapped to ROFF_am in roff_block(). */
+ case ROFF_ami:
+ case ROFF_de:
+ /* ROFF_de1 is remapped to ROFF_de in roff_block(). */
+ case ROFF_dei:
+ case ROFF_ig:
+ break;
+ default:
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
+ ln, ppos, "..");
+ return ROFF_IGN;
+ }
+
+ if (buf->buf[pos] != '\0')
+ mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
+ ".. %s", buf->buf + pos);
+
+ roffnode_pop(r);
+ roffnode_cleanscope(r);
+ return ROFF_IGN;
+
+}
+
+static void
+roffnode_cleanscope(struct roff *r)
+{
+
+ while (r->last) {
+ if (--r->last->endspan != 0)
+ break;
+ roffnode_pop(r);
+ }
+}
+
+static void
+roff_ccond(struct roff *r, int ln, int ppos)
+{
+
+ if (NULL == r->last) {
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
+ ln, ppos, "\\}");
+ return;
+ }
+
+ switch (r->last->tok) {
+ case ROFF_el:
+ case ROFF_ie:
+ case ROFF_if:
+ break;
+ default:
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
+ ln, ppos, "\\}");
+ return;
+ }
+
+ if (r->last->endspan > -1) {
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
+ ln, ppos, "\\}");
+ return;
+ }
+
+ roffnode_pop(r);
+ roffnode_cleanscope(r);
+ return;
+}
+
+static enum rofferr
+roff_block(ROFF_ARGS)
+{
+ const char *name;
+ char *iname, *cp;
+ size_t namesz;
+
+ /* Ignore groff compatibility mode for now. */
+
+ if (tok == ROFF_de1)
+ tok = ROFF_de;
+ else if (tok == ROFF_dei1)
+ tok = ROFF_dei;
+ else if (tok == ROFF_am1)
+ tok = ROFF_am;
+ else if (tok == ROFF_ami1)
+ tok = ROFF_ami;
+
+ /* Parse the macro name argument. */
+
+ cp = buf->buf + pos;
+ if (tok == ROFF_ig) {
+ iname = NULL;
+ namesz = 0;
+ } else {
+ iname = cp;
+ namesz = roff_getname(r, &cp, ln, ppos);
+ iname[namesz] = '\0';
+ }
+
+ /* Resolve the macro name argument if it is indirect. */
+
+ if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
+ if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
+ mandoc_vmsg(MANDOCERR_STR_UNDEF,
+ r->parse, ln, (int)(iname - buf->buf),
+ "%.*s", (int)namesz, iname);
+ namesz = 0;
+ } else
+ namesz = strlen(name);
+ } else
+ name = iname;
+
+ if (namesz == 0 && tok != ROFF_ig) {
+ mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse,
+ ln, ppos, roffs[tok].name);
+ return ROFF_IGN;
+ }
+
+ roffnode_push(r, tok, name, ln, ppos);
+
+ /*
+ * At the beginning of a `de' macro, clear the existing string
+ * with the same name, if there is one. New content will be
+ * appended from roff_block_text() in multiline mode.
+ */
+
+ if (tok == ROFF_de || tok == ROFF_dei)
+ roff_setstrn(&r->strtab, name, namesz, "", 0, 0);
+
+ if (*cp == '\0')
+ return ROFF_IGN;
+
+ /* Get the custom end marker. */
+
+ iname = cp;
+ namesz = roff_getname(r, &cp, ln, ppos);
+
+ /* Resolve the end marker if it is indirect. */
+
+ if (namesz && (tok == ROFF_dei || tok == ROFF_ami)) {
+ if ((name = roff_getstrn(r, iname, namesz)) == NULL) {
+ mandoc_vmsg(MANDOCERR_STR_UNDEF,
+ r->parse, ln, (int)(iname - buf->buf),
+ "%.*s", (int)namesz, iname);
+ namesz = 0;
+ } else
+ namesz = strlen(name);
+ } else
+ name = iname;
+
+ if (namesz)
+ r->last->end = mandoc_strndup(name, namesz);
+
+ if (*cp != '\0')
+ mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
+ ln, pos, ".%s ... %s", roffs[tok].name, cp);
+
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_block_sub(ROFF_ARGS)
+{
+ enum rofft t;
+ int i, j;
+
+ /*
+ * First check whether a custom macro exists at this level. If
+ * it does, then check against it. This is some of groff's
+ * stranger behaviours. If we encountered a custom end-scope
+ * tag and that tag also happens to be a "real" macro, then we
+ * need to try interpreting it again as a real macro. If it's
+ * not, then return ignore. Else continue.
+ */
+
+ if (r->last->end) {
+ for (i = pos, j = 0; r->last->end[j]; j++, i++)
+ if (buf->buf[i] != r->last->end[j])
+ break;
+
+ if (r->last->end[j] == '\0' &&
+ (buf->buf[i] == '\0' ||
+ buf->buf[i] == ' ' ||
+ buf->buf[i] == '\t')) {
+ roffnode_pop(r);
+ roffnode_cleanscope(r);
+
+ while (buf->buf[i] == ' ' || buf->buf[i] == '\t')
+ i++;
+
+ pos = i;
+ if (roff_parse(r, buf->buf, &pos, ln, ppos) !=
+ ROFF_MAX)
+ return ROFF_RERUN;
+ return ROFF_IGN;
+ }
+ }
+
+ /*
+ * If we have no custom end-query or lookup failed, then try
+ * pulling it out of the hashtable.
+ */
+
+ t = roff_parse(r, buf->buf, &pos, ln, ppos);
+
+ if (t != ROFF_cblock) {
+ if (tok != ROFF_ig)
+ roff_setstr(r, r->last->name, buf->buf + ppos, 2);
+ return ROFF_IGN;
+ }
+
+ assert(roffs[t].proc);
+ return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
+}
+
+static enum rofferr
+roff_block_text(ROFF_ARGS)
+{
+
+ if (tok != ROFF_ig)
+ roff_setstr(r, r->last->name, buf->buf + pos, 2);
+
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_cond_sub(ROFF_ARGS)
+{
+ enum rofft t;
+ char *ep;
+ int rr;
+
+ rr = r->last->rule;
+ roffnode_cleanscope(r);
+ t = roff_parse(r, buf->buf, &pos, ln, ppos);
+
+ /*
+ * Fully handle known macros when they are structurally
+ * required or when the conditional evaluated to true.
+ */
+
+ if ((t != ROFF_MAX) &&
+ (rr || roffs[t].flags & ROFFMAC_STRUCT)) {
+ assert(roffs[t].proc);
+ return (*roffs[t].proc)(r, t, buf, ln, ppos, pos, offs);
+ }
+
+ /*
+ * If `\}' occurs on a macro line without a preceding macro,
+ * drop the line completely.
+ */
+
+ ep = buf->buf + pos;
+ if (ep[0] == '\\' && ep[1] == '}')
+ rr = 0;
+
+ /* Always check for the closing delimiter `\}'. */
+
+ while ((ep = strchr(ep, '\\')) != NULL) {
+ if (*(++ep) == '}') {
+ *ep = '&';
+ roff_ccond(r, ln, ep - buf->buf - 1);
+ }
+ if (*ep != '\0')
+ ++ep;
+ }
+ return rr ? ROFF_CONT : ROFF_IGN;
+}
+
+static enum rofferr
+roff_cond_text(ROFF_ARGS)
+{
+ char *ep;
+ int rr;
+
+ rr = r->last->rule;
+ roffnode_cleanscope(r);
+
+ ep = buf->buf + pos;
+ while ((ep = strchr(ep, '\\')) != NULL) {
+ if (*(++ep) == '}') {
+ *ep = '&';
+ roff_ccond(r, ln, ep - buf->buf - 1);
+ }
+ if (*ep != '\0')
+ ++ep;
+ }
+ return rr ? ROFF_CONT : ROFF_IGN;
+}
+
+/* --- handling of numeric and conditional expressions -------------------- */
+
+/*
+ * Parse a single signed integer number. Stop at the first non-digit.
+ * If there is at least one digit, return success and advance the
+ * parse point, else return failure and let the parse point unchanged.
+ * Ignore overflows, treat them just like the C language.
+ */
+static int
+roff_getnum(const char *v, int *pos, int *res, int flags)
+{
+ int myres, scaled, n, p;
+
+ if (NULL == res)
+ res = &myres;
+
+ p = *pos;
+ n = v[p] == '-';
+ if (n || v[p] == '+')
+ p++;
+
+ if (flags & ROFFNUM_WHITE)
+ while (isspace((unsigned char)v[p]))
+ p++;
+
+ for (*res = 0; isdigit((unsigned char)v[p]); p++)
+ *res = 10 * *res + v[p] - '0';
+ if (p == *pos + n)
+ return 0;
+
+ if (n)
+ *res = -*res;
+
+ /* Each number may be followed by one optional scaling unit. */
+
+ switch (v[p]) {
+ case 'f':
+ scaled = *res * 65536;
+ break;
+ case 'i':
+ scaled = *res * 240;
+ break;
+ case 'c':
+ scaled = *res * 240 / 2.54;
+ break;
+ case 'v':
+ case 'P':
+ scaled = *res * 40;
+ break;
+ case 'm':
+ case 'n':
+ scaled = *res * 24;
+ break;
+ case 'p':
+ scaled = *res * 10 / 3;
+ break;
+ case 'u':
+ scaled = *res;
+ break;
+ case 'M':
+ scaled = *res * 6 / 25;
+ break;
+ default:
+ scaled = *res;
+ p--;
+ break;
+ }
+ if (flags & ROFFNUM_SCALE)
+ *res = scaled;
+
+ *pos = p + 1;
+ return 1;
+}
+
+/*
+ * Evaluate a string comparison condition.
+ * The first character is the delimiter.
+ * Succeed if the string up to its second occurrence
+ * matches the string up to its third occurence.
+ * Advance the cursor after the third occurrence
+ * or lacking that, to the end of the line.
+ */
+static int
+roff_evalstrcond(const char *v, int *pos)
+{
+ const char *s1, *s2, *s3;
+ int match;
+
+ match = 0;
+ s1 = v + *pos; /* initial delimiter */
+ s2 = s1 + 1; /* for scanning the first string */
+ s3 = strchr(s2, *s1); /* for scanning the second string */
+
+ if (NULL == s3) /* found no middle delimiter */
+ goto out;
+
+ while ('\0' != *++s3) {
+ if (*s2 != *s3) { /* mismatch */
+ s3 = strchr(s3, *s1);
+ break;
+ }
+ if (*s3 == *s1) { /* found the final delimiter */
+ match = 1;
+ break;
+ }
+ s2++;
+ }
+
+out:
+ if (NULL == s3)
+ s3 = strchr(s2, '\0');
+ else if (*s3 != '\0')
+ s3++;
+ *pos = s3 - v;
+ return match;
+}
+
+/*
+ * Evaluate an optionally negated single character, numerical,
+ * or string condition.
+ */
+static int
+roff_evalcond(struct roff *r, int ln, char *v, int *pos)
+{
+ char *cp, *name;
+ size_t sz;
+ int number, savepos, wanttrue;
+
+ if ('!' == v[*pos]) {
+ wanttrue = 0;
+ (*pos)++;
+ } else
+ wanttrue = 1;
+
+ switch (v[*pos]) {
+ case '\0':
+ return 0;
+ case 'n':
+ case 'o':
+ (*pos)++;
+ return wanttrue;
+ case 'c':
+ case 'd':
+ case 'e':
+ case 't':
+ case 'v':
+ (*pos)++;
+ return !wanttrue;
+ case 'r':
+ cp = name = v + ++*pos;
+ sz = roff_getname(r, &cp, ln, *pos);
+ *pos = cp - v;
+ return (sz && roff_hasregn(r, name, sz)) == wanttrue;
+ default:
+ break;
+ }
+
+ savepos = *pos;
+ if (roff_evalnum(r, ln, v, pos, &number, ROFFNUM_SCALE))
+ return (number > 0) == wanttrue;
+ else if (*pos == savepos)
+ return roff_evalstrcond(v, pos) == wanttrue;
+ else
+ return 0;
+}
+
+static enum rofferr
+roff_line_ignore(ROFF_ARGS)
+{
+
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_insec(ROFF_ARGS)
+{
+
+ mandoc_msg(MANDOCERR_REQ_INSEC, r->parse,
+ ln, ppos, roffs[tok].name);
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_unsupp(ROFF_ARGS)
+{
+
+ mandoc_msg(MANDOCERR_REQ_UNSUPP, r->parse,
+ ln, ppos, roffs[tok].name);
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_cond(ROFF_ARGS)
+{
+
+ roffnode_push(r, tok, NULL, ln, ppos);
+
+ /*
+ * An `.el' has no conditional body: it will consume the value
+ * of the current rstack entry set in prior `ie' calls or
+ * defaults to DENY.
+ *
+ * If we're not an `el', however, then evaluate the conditional.
+ */
+
+ r->last->rule = tok == ROFF_el ?
+ (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
+ roff_evalcond(r, ln, buf->buf, &pos);
+
+ /*
+ * An if-else will put the NEGATION of the current evaluated
+ * conditional into the stack of rules.
+ */
+
+ if (tok == ROFF_ie) {
+ if (r->rstackpos + 1 == r->rstacksz) {
+ r->rstacksz += 16;
+ r->rstack = mandoc_reallocarray(r->rstack,
+ r->rstacksz, sizeof(int));
+ }
+ r->rstack[++r->rstackpos] = !r->last->rule;
+ }
+
+ /* If the parent has false as its rule, then so do we. */
+
+ if (r->last->parent && !r->last->parent->rule)
+ r->last->rule = 0;
+
+ /*
+ * Determine scope.
+ * If there is nothing on the line after the conditional,
+ * not even whitespace, use next-line scope.
+ */
+
+ if (buf->buf[pos] == '\0') {
+ r->last->endspan = 2;
+ goto out;
+ }
+
+ while (buf->buf[pos] == ' ')
+ pos++;
+
+ /* An opening brace requests multiline scope. */
+
+ if (buf->buf[pos] == '\\' && buf->buf[pos + 1] == '{') {
+ r->last->endspan = -1;
+ pos += 2;
+ while (buf->buf[pos] == ' ')
+ pos++;
+ goto out;
+ }
+
+ /*
+ * Anything else following the conditional causes
+ * single-line scope. Warn if the scope contains
+ * nothing but trailing whitespace.
+ */
+
+ if (buf->buf[pos] == '\0')
+ mandoc_msg(MANDOCERR_COND_EMPTY, r->parse,
+ ln, ppos, roffs[tok].name);
+
+ r->last->endspan = 1;
+
+out:
+ *offs = pos;
+ return ROFF_RERUN;
+}
+
+static enum rofferr
+roff_ds(ROFF_ARGS)
+{
+ char *string;
+ const char *name;
+ size_t namesz;
+
+ /* Ignore groff compatibility mode for now. */
+
+ if (tok == ROFF_ds1)
+ tok = ROFF_ds;
+ else if (tok == ROFF_as1)
+ tok = ROFF_as;
+
+ /*
+ * The first word is the name of the string.
+ * If it is empty or terminated by an escape sequence,
+ * abort the `ds' request without defining anything.
+ */
+
+ name = string = buf->buf + pos;
+ if (*name == '\0')
+ return ROFF_IGN;
+
+ namesz = roff_getname(r, &string, ln, pos);
+ if (name[namesz] == '\\')
+ return ROFF_IGN;
+
+ /* Read past the initial double-quote, if any. */
+ if (*string == '"')
+ string++;
+
+ /* The rest is the value. */
+ roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
+ ROFF_as == tok);
+ return ROFF_IGN;
+}
+
+/*
+ * Parse a single operator, one or two characters long.
+ * If the operator is recognized, return success and advance the
+ * parse point, else return failure and let the parse point unchanged.
+ */
+static int
+roff_getop(const char *v, int *pos, char *res)
+{
+
+ *res = v[*pos];
+
+ switch (*res) {
+ case '+':
+ case '-':
+ case '*':
+ case '/':
+ case '%':
+ case '&':
+ case ':':
+ break;
+ case '<':
+ switch (v[*pos + 1]) {
+ case '=':
+ *res = 'l';
+ (*pos)++;
+ break;
+ case '>':
+ *res = '!';
+ (*pos)++;
+ break;
+ case '?':
+ *res = 'i';
+ (*pos)++;
+ break;
+ default:
+ break;
+ }
+ break;
+ case '>':
+ switch (v[*pos + 1]) {
+ case '=':
+ *res = 'g';
+ (*pos)++;
+ break;
+ case '?':
+ *res = 'a';
+ (*pos)++;
+ break;
+ default:
+ break;
+ }
+ break;
+ case '=':
+ if ('=' == v[*pos + 1])
+ (*pos)++;
+ break;
+ default:
+ return 0;
+ }
+ (*pos)++;
+
+ return *res;
+}
+
+/*
+ * Evaluate either a parenthesized numeric expression
+ * or a single signed integer number.
+ */
+static int
+roff_evalpar(struct roff *r, int ln,
+ const char *v, int *pos, int *res, int flags)
+{
+
+ if ('(' != v[*pos])
+ return roff_getnum(v, pos, res, flags);
+
+ (*pos)++;
+ if ( ! roff_evalnum(r, ln, v, pos, res, flags | ROFFNUM_WHITE))
+ return 0;
+
+ /*
+ * Omission of the closing parenthesis
+ * is an error in validation mode,
+ * but ignored in evaluation mode.
+ */
+
+ if (')' == v[*pos])
+ (*pos)++;
+ else if (NULL == res)
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Evaluate a complete numeric expression.
+ * Proceed left to right, there is no concept of precedence.
+ */
+static int
+roff_evalnum(struct roff *r, int ln, const char *v,
+ int *pos, int *res, int flags)
+{
+ int mypos, operand2;
+ char operator;
+
+ if (NULL == pos) {
+ mypos = 0;
+ pos = &mypos;
+ }
+
+ if (flags & ROFFNUM_WHITE)
+ while (isspace((unsigned char)v[*pos]))
+ (*pos)++;
+
+ if ( ! roff_evalpar(r, ln, v, pos, res, flags))
+ return 0;
+
+ while (1) {
+ if (flags & ROFFNUM_WHITE)
+ while (isspace((unsigned char)v[*pos]))
+ (*pos)++;
+
+ if ( ! roff_getop(v, pos, &operator))
+ break;
+
+ if (flags & ROFFNUM_WHITE)
+ while (isspace((unsigned char)v[*pos]))
+ (*pos)++;
+
+ if ( ! roff_evalpar(r, ln, v, pos, &operand2, flags))
+ return 0;
+
+ if (flags & ROFFNUM_WHITE)
+ while (isspace((unsigned char)v[*pos]))
+ (*pos)++;
+
+ if (NULL == res)
+ continue;
+
+ switch (operator) {
+ case '+':
+ *res += operand2;
+ break;
+ case '-':
+ *res -= operand2;
+ break;
+ case '*':
+ *res *= operand2;
+ break;
+ case '/':
+ if (operand2 == 0) {
+ mandoc_msg(MANDOCERR_DIVZERO,
+ r->parse, ln, *pos, v);
+ *res = 0;
+ break;
+ }
+ *res /= operand2;
+ break;
+ case '%':
+ if (operand2 == 0) {
+ mandoc_msg(MANDOCERR_DIVZERO,
+ r->parse, ln, *pos, v);
+ *res = 0;
+ break;
+ }
+ *res %= operand2;
+ break;
+ case '<':
+ *res = *res < operand2;
+ break;
+ case '>':
+ *res = *res > operand2;
+ break;
+ case 'l':
+ *res = *res <= operand2;
+ break;
+ case 'g':
+ *res = *res >= operand2;
+ break;
+ case '=':
+ *res = *res == operand2;
+ break;
+ case '!':
+ *res = *res != operand2;
+ break;
+ case '&':
+ *res = *res && operand2;
+ break;
+ case ':':
+ *res = *res || operand2;
+ break;
+ case 'i':
+ if (operand2 < *res)
+ *res = operand2;
+ break;
+ case 'a':
+ if (operand2 > *res)
+ *res = operand2;
+ break;
+ default:
+ abort();
+ }
+ }
+ return 1;
+}
+
+/* --- register management ------------------------------------------------ */
+
+void
+roff_setreg(struct roff *r, const char *name, int val, char sign)
+{
+ struct roffreg *reg;
+
+ /* Search for an existing register with the same name. */
+ reg = r->regtab;
+
+ while (reg && strcmp(name, reg->key.p))
+ reg = reg->next;
+
+ if (NULL == reg) {
+ /* Create a new register. */
+ reg = mandoc_malloc(sizeof(struct roffreg));
+ reg->key.p = mandoc_strdup(name);
+ reg->key.sz = strlen(name);
+ reg->val = 0;
+ reg->next = r->regtab;
+ r->regtab = reg;
+ }
+
+ if ('+' == sign)
+ reg->val += val;
+ else if ('-' == sign)
+ reg->val -= val;
+ else
+ reg->val = val;
+}
+
+/*
+ * Handle some predefined read-only number registers.
+ * For now, return -1 if the requested register is not predefined;
+ * in case a predefined read-only register having the value -1
+ * were to turn up, another special value would have to be chosen.
+ */
+static int
+roff_getregro(const struct roff *r, const char *name)
+{
+
+ switch (*name) {
+ case '$': /* Number of arguments of the last macro evaluated. */
+ return r->argc;
+ case 'A': /* ASCII approximation mode is always off. */
+ return 0;
+ case 'g': /* Groff compatibility mode is always on. */
+ return 1;
+ case 'H': /* Fixed horizontal resolution. */
+ return 24;
+ case 'j': /* Always adjust left margin only. */
+ return 0;
+ case 'T': /* Some output device is always defined. */
+ return 1;
+ case 'V': /* Fixed vertical resolution. */
+ return 40;
+ default:
+ return -1;
+ }
+}
+
+int
+roff_getreg(const struct roff *r, const char *name)
+{
+ struct roffreg *reg;
+ int val;
+
+ if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {
+ val = roff_getregro(r, name + 1);
+ if (-1 != val)
+ return val;
+ }
+
+ for (reg = r->regtab; reg; reg = reg->next)
+ if (0 == strcmp(name, reg->key.p))
+ return reg->val;
+
+ return 0;
+}
+
+static int
+roff_getregn(const struct roff *r, const char *name, size_t len)
+{
+ struct roffreg *reg;
+ int val;
+
+ if ('.' == name[0] && 2 == len) {
+ val = roff_getregro(r, name + 1);
+ if (-1 != val)
+ return val;
+ }
+
+ for (reg = r->regtab; reg; reg = reg->next)
+ if (len == reg->key.sz &&
+ 0 == strncmp(name, reg->key.p, len))
+ return reg->val;
+
+ return 0;
+}
+
+static int
+roff_hasregn(const struct roff *r, const char *name, size_t len)
+{
+ struct roffreg *reg;
+ int val;
- assert(roffs[t].proc);
- return((*roffs[t].proc)(r, t, bufp, szp,
- ln, ppos, pos, offs));
+ if ('.' == name[0] && 2 == len) {
+ val = roff_getregro(r, name + 1);
+ if (-1 != val)
+ return 1;
+ }
+
+ for (reg = r->regtab; reg; reg = reg->next)
+ if (len == reg->key.sz &&
+ 0 == strncmp(name, reg->key.p, len))
+ return 1;
+
+ return 0;
}
+static void
+roff_freereg(struct roffreg *reg)
+{
+ struct roffreg *old_reg;
+
+ while (NULL != reg) {
+ free(reg->key.p);
+ old_reg = reg;
+ reg = reg->next;
+ free(old_reg);
+ }
+}
-/* ARGSUSED */
static enum rofferr
-roff_cond_text(ROFF_ARGS)
+roff_nr(ROFF_ARGS)
{
- char *ep, *st;
- enum roffrule rr;
+ char *key, *val;
+ size_t keysz;
+ int iv;
+ char sign;
- rr = r->last->rule;
+ key = val = buf->buf + pos;
+ if (*key == '\0')
+ return ROFF_IGN;
+
+ keysz = roff_getname(r, &val, ln, pos);
+ if (key[keysz] == '\\')
+ return ROFF_IGN;
+ key[keysz] = '\0';
+
+ sign = *val;
+ if (sign == '+' || sign == '-')
+ val++;
+
+ if (roff_evalnum(r, ln, val, NULL, &iv, ROFFNUM_SCALE))
+ roff_setreg(r, key, iv, sign);
+
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_rr(ROFF_ARGS)
+{
+ struct roffreg *reg, **prev;
+ char *name, *cp;
+ size_t namesz;
+
+ name = cp = buf->buf + pos;
+ if (*name == '\0')
+ return ROFF_IGN;
+ namesz = roff_getname(r, &cp, ln, pos);
+ name[namesz] = '\0';
+
+ prev = &r->regtab;
+ while (1) {
+ reg = *prev;
+ if (reg == NULL || !strcmp(name, reg->key.p))
+ break;
+ prev = ®->next;
+ }
+ if (reg != NULL) {
+ *prev = reg->next;
+ free(reg->key.p);
+ free(reg);
+ }
+ return ROFF_IGN;
+}
+
+/* --- handler functions for roff requests -------------------------------- */
+
+static enum rofferr
+roff_rm(ROFF_ARGS)
+{
+ const char *name;
+ char *cp;
+ size_t namesz;
+
+ cp = buf->buf + pos;
+ while (*cp != '\0') {
+ name = cp;
+ namesz = roff_getname(r, &cp, ln, (int)(cp - buf->buf));
+ roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
+ if (name[namesz] == '\\')
+ break;
+ }
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_it(ROFF_ARGS)
+{
+ int iv;
+
+ /* Parse the number of lines. */
+
+ if ( ! roff_evalnum(r, ln, buf->buf, &pos, &iv, 0)) {
+ mandoc_msg(MANDOCERR_IT_NONUM, r->parse,
+ ln, ppos, buf->buf + 1);
+ return ROFF_IGN;
+ }
+
+ while (isspace((unsigned char)buf->buf[pos]))
+ pos++;
/*
- * We display the value of the text if out current evaluation
- * scope permits us to do so.
+ * Arm the input line trap.
+ * Special-casing "an-trap" is an ugly workaround to cope
+ * with DocBook stupidly fiddling with man(7) internals.
*/
- st = &(*bufp)[pos];
- if (NULL == (ep = strstr(st, "\\}"))) {
- roffnode_cleanscope(r);
- return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
- }
+ roffit_lines = iv;
+ roffit_macro = mandoc_strdup(iv != 1 ||
+ strcmp(buf->buf + pos, "an-trap") ?
+ buf->buf + pos : "br");
+ return ROFF_IGN;
+}
- if (ep == st || (ep > st && '\\' != *(ep - 1)))
- roffnode_pop(r);
+static enum rofferr
+roff_Dd(ROFF_ARGS)
+{
+ const char *const *cp;
- roffnode_cleanscope(r);
- return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
+ if ((r->options & (MPARSE_MDOC | MPARSE_QUICK)) == 0)
+ for (cp = __mdoc_reserved; *cp; cp++)
+ roff_setstr(r, *cp, NULL, 0);
+
+ if (r->format == 0)
+ r->format = MPARSE_MDOC;
+
+ return ROFF_CONT;
}
+static enum rofferr
+roff_TH(ROFF_ARGS)
+{
+ const char *const *cp;
+
+ if ((r->options & MPARSE_QUICK) == 0)
+ for (cp = __man_reserved; *cp; cp++)
+ roff_setstr(r, *cp, NULL, 0);
+
+ if (r->format == 0)
+ r->format = MPARSE_MAN;
-static enum roffrule
-roff_evalcond(const char *v, int *pos)
+ return ROFF_CONT;
+}
+
+static enum rofferr
+roff_TE(ROFF_ARGS)
{
- switch (v[*pos]) {
- case ('n'):
- (*pos)++;
- return(ROFFRULE_ALLOW);
- case ('e'):
- /* FALLTHROUGH */
- case ('o'):
- /* FALLTHROUGH */
- case ('t'):
- (*pos)++;
- return(ROFFRULE_DENY);
- default:
- break;
+ if (NULL == r->tbl)
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
+ ln, ppos, "TE");
+ else if ( ! tbl_end(&r->tbl)) {
+ free(buf->buf);
+ buf->buf = mandoc_strdup(".sp");
+ buf->sz = 4;
+ return ROFF_REPARSE;
}
+ return ROFF_IGN;
+}
- while (v[*pos] && ' ' != v[*pos])
- (*pos)++;
- return(ROFFRULE_DENY);
+static enum rofferr
+roff_T_(ROFF_ARGS)
+{
+
+ if (NULL == r->tbl)
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse,
+ ln, ppos, "T&");
+ else
+ tbl_restart(ppos, ln, r->tbl);
+
+ return ROFF_IGN;
+}
+
+/*
+ * Handle in-line equation delimiters.
+ */
+static enum rofferr
+roff_eqndelim(struct roff *r, struct buf *buf, int pos)
+{
+ char *cp1, *cp2;
+ const char *bef_pr, *bef_nl, *mac, *aft_nl, *aft_pr;
+
+ /*
+ * Outside equations, look for an opening delimiter.
+ * If we are inside an equation, we already know it is
+ * in-line, or this function wouldn't have been called;
+ * so look for a closing delimiter.
+ */
+
+ cp1 = buf->buf + pos;
+ cp2 = strchr(cp1, r->eqn == NULL ?
+ r->last_eqn->odelim : r->last_eqn->cdelim);
+ if (cp2 == NULL)
+ return ROFF_CONT;
+
+ *cp2++ = '\0';
+ bef_pr = bef_nl = aft_nl = aft_pr = "";
+
+ /* Handle preceding text, protecting whitespace. */
+
+ if (*buf->buf != '\0') {
+ if (r->eqn == NULL)
+ bef_pr = "\\&";
+ bef_nl = "\n";
+ }
+
+ /*
+ * Prepare replacing the delimiter with an equation macro
+ * and drop leading white space from the equation.
+ */
+
+ if (r->eqn == NULL) {
+ while (*cp2 == ' ')
+ cp2++;
+ mac = ".EQ";
+ } else
+ mac = ".EN";
+
+ /* Handle following text, protecting whitespace. */
+
+ if (*cp2 != '\0') {
+ aft_nl = "\n";
+ if (r->eqn != NULL)
+ aft_pr = "\\&";
+ }
+
+ /* Do the actual replacement. */
+
+ buf->sz = mandoc_asprintf(&cp1, "%s%s%s%s%s%s%s", buf->buf,
+ bef_pr, bef_nl, mac, aft_nl, aft_pr, cp2) + 1;
+ free(buf->buf);
+ buf->buf = cp1;
+
+ /* Toggle the in-line state of the eqn subsystem. */
+
+ r->eqn_inline = r->eqn == NULL;
+ return ROFF_REPARSE;
+}
+
+static enum rofferr
+roff_EQ(ROFF_ARGS)
+{
+ struct eqn_node *e;
+
+ assert(r->eqn == NULL);
+ e = eqn_alloc(ppos, ln, r->parse);
+
+ if (r->last_eqn) {
+ r->last_eqn->next = e;
+ e->delim = r->last_eqn->delim;
+ e->odelim = r->last_eqn->odelim;
+ e->cdelim = r->last_eqn->cdelim;
+ } else
+ r->first_eqn = r->last_eqn = e;
+
+ r->eqn = r->last_eqn = e;
+
+ if (buf->buf[pos] != '\0')
+ mandoc_vmsg(MANDOCERR_ARG_SKIP, r->parse, ln, pos,
+ ".EQ %s", buf->buf + pos);
+
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_EN(ROFF_ARGS)
+{
+
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, r->parse, ln, ppos, "EN");
+ return ROFF_IGN;
}
+static enum rofferr
+roff_TS(ROFF_ARGS)
+{
+ struct tbl_node *tbl;
+
+ if (r->tbl) {
+ mandoc_msg(MANDOCERR_BLK_BROKEN, r->parse,
+ ln, ppos, "TS breaks TS");
+ tbl_end(&r->tbl);
+ }
+
+ tbl = tbl_alloc(ppos, ln, r->parse);
+
+ if (r->last_tbl)
+ r->last_tbl->next = tbl;
+ else
+ r->first_tbl = r->last_tbl = tbl;
+
+ r->tbl = r->last_tbl = tbl;
+ return ROFF_IGN;
+}
-/* ARGSUSED */
static enum rofferr
-roff_line(ROFF_ARGS)
+roff_brp(ROFF_ARGS)
{
- return(ROFF_IGN);
+ buf->buf[pos - 1] = '\0';
+ return ROFF_CONT;
}
+static enum rofferr
+roff_cc(ROFF_ARGS)
+{
+ const char *p;
+
+ p = buf->buf + pos;
+
+ if (*p == '\0' || (r->control = *p++) == '.')
+ r->control = 0;
+
+ if (*p != '\0')
+ mandoc_vmsg(MANDOCERR_ARG_EXCESS, r->parse,
+ ln, p - buf->buf, "cc ... %s", p);
+
+ return ROFF_IGN;
+}
-/* ARGSUSED */
static enum rofferr
-roff_cond(ROFF_ARGS)
+roff_tr(ROFF_ARGS)
{
- int sv;
- enum roffrule rule;
+ const char *p, *first, *second;
+ size_t fsz, ssz;
+ enum mandoc_esc esc;
- /* Stack overflow! */
+ p = buf->buf + pos;
- if (ROFF_ie == tok && r->rstackpos == RSTACK_MAX - 1) {
- (*r->msg)(MANDOCERR_MEM, r->data, ln, ppos, NULL);
- return(ROFF_ERR);
+ if (*p == '\0') {
+ mandoc_msg(MANDOCERR_REQ_EMPTY, r->parse, ln, ppos, "tr");
+ return ROFF_IGN;
}
- /* First, evaluate the conditional. */
+ while (*p != '\0') {
+ fsz = ssz = 1;
+
+ first = p++;
+ if (*first == '\\') {
+ esc = mandoc_escape(&p, NULL, NULL);
+ if (esc == ESCAPE_ERROR) {
+ mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
+ ln, (int)(p - buf->buf), first);
+ return ROFF_IGN;
+ }
+ fsz = (size_t)(p - first);
+ }
+
+ second = p++;
+ if (*second == '\\') {
+ esc = mandoc_escape(&p, NULL, NULL);
+ if (esc == ESCAPE_ERROR) {
+ mandoc_msg(MANDOCERR_ESC_BAD, r->parse,
+ ln, (int)(p - buf->buf), second);
+ return ROFF_IGN;
+ }
+ ssz = (size_t)(p - second);
+ } else if (*second == '\0') {
+ mandoc_vmsg(MANDOCERR_TR_ODD, r->parse,
+ ln, first - buf->buf, "tr %s", first);
+ second = " ";
+ p--;
+ }
- if (ROFF_el == tok) {
- /*
- * An `.el' will get the value of the current rstack
- * entry set in prior `ie' calls or defaults to DENY.
- */
- if (r->rstackpos < 0)
- rule = ROFFRULE_DENY;
- else
- rule = r->rstack[r->rstackpos];
- } else
- rule = roff_evalcond(*bufp, &pos);
+ if (fsz > 1) {
+ roff_setstrn(&r->xmbtab, first, fsz,
+ second, ssz, 0);
+ continue;
+ }
- sv = pos;
+ if (r->xtab == NULL)
+ r->xtab = mandoc_calloc(128,
+ sizeof(struct roffstr));
- while (' ' == (*bufp)[pos])
- pos++;
+ free(r->xtab[(int)*first].p);
+ r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
+ r->xtab[(int)*first].sz = ssz;
+ }
+
+ return ROFF_IGN;
+}
+
+static enum rofferr
+roff_so(ROFF_ARGS)
+{
+ char *name, *cp;
+
+ name = buf->buf + pos;
+ mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, "so %s", name);
/*
- * Roff is weird. If we have just white-space after the
- * conditional, it's considered the BODY and we exit without
- * really doing anything. Warn about this. It's probably
- * wrong.
+ * Handle `so'. Be EXTREMELY careful, as we shouldn't be
+ * opening anything that's not in our cwd or anything beneath
+ * it. Thus, explicitly disallow traversing up the file-system
+ * or using absolute paths.
*/
- if ('\0' == (*bufp)[pos] && sv != pos) {
- if ((*r->msg)(MANDOCERR_NOARGS, r->data, ln, ppos, NULL))
- return(ROFF_IGN);
- return(ROFF_ERR);
+ if (*name == '/' || strstr(name, "../") || strstr(name, "/..")) {
+ mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
+ ".so %s", name);
+ buf->sz = mandoc_asprintf(&cp,
+ ".sp\nSee the file %s.\n.sp", name) + 1;
+ free(buf->buf);
+ buf->buf = cp;
+ *offs = 0;
+ return ROFF_REPARSE;
}
- if ( ! roffnode_push(r, tok, ln, ppos))
- return(ROFF_ERR);
+ *offs = pos;
+ return ROFF_SO;
+}
+
+/* --- user defined strings and macros ------------------------------------ */
+
+static enum rofferr
+roff_userdef(ROFF_ARGS)
+{
+ const char *arg[9], *ap;
+ char *cp, *n1, *n2;
+ int i, ib, ie;
+ size_t asz, rsz;
+
+ /*
+ * Collect pointers to macro argument strings
+ * and NUL-terminate them.
+ */
+
+ r->argc = 0;
+ cp = buf->buf + pos;
+ for (i = 0; i < 9; i++) {
+ if (*cp == '\0')
+ arg[i] = "";
+ else {
+ arg[i] = mandoc_getarg(r->parse, &cp, ln, &pos);
+ r->argc = i + 1;
+ }
+ }
- r->last->rule = rule;
+ /*
+ * Expand macro arguments.
+ */
- ROFF_DEBUG("roff: cond: %s -> %s\n", roffs[tok].name,
- ROFFRULE_ALLOW == rule ? "allow" : "deny");
+ buf->sz = strlen(r->current_string) + 1;
+ n1 = cp = mandoc_malloc(buf->sz);
+ memcpy(n1, r->current_string, buf->sz);
+ while (*cp != '\0') {
+
+ /* Scan ahead for the next argument invocation. */
+
+ if (*cp++ != '\\')
+ continue;
+ if (*cp++ != '$')
+ continue;
+ if (*cp == '*') { /* \\$* inserts all arguments */
+ ib = 0;
+ ie = r->argc - 1;
+ } else { /* \\$1 .. \\$9 insert one argument */
+ ib = ie = *cp - '1';
+ if (ib < 0 || ib > 8)
+ continue;
+ }
+ cp -= 2;
- if (ROFF_ie == tok) {
/*
- * An if-else will put the NEGATION of the current
- * evaluated conditional into the stack.
+ * Determine the size of the expanded argument,
+ * taking escaping of quotes into account.
*/
- r->rstackpos++;
- if (ROFFRULE_DENY == r->last->rule)
- r->rstack[r->rstackpos] = ROFFRULE_ALLOW;
- else
- r->rstack[r->rstackpos] = ROFFRULE_DENY;
- }
- /* If the parent has false as its rule, then so do we. */
+ asz = ie > ib ? ie - ib : 0; /* for blanks */
+ for (i = ib; i <= ie; i++) {
+ for (ap = arg[i]; *ap != '\0'; ap++) {
+ asz++;
+ if (*ap == '"')
+ asz += 3;
+ }
+ }
+ if (asz != 3) {
+
+ /*
+ * Determine the size of the rest of the
+ * unexpanded macro, including the NUL.
+ */
+
+ rsz = buf->sz - (cp - n1) - 3;
+
+ /*
+ * When shrinking, move before
+ * releasing the storage.
+ */
+
+ if (asz < 3)
+ memmove(cp + asz, cp + 3, rsz);
- if (r->last->parent && ROFFRULE_DENY == r->last->parent->rule) {
- r->last->rule = ROFFRULE_DENY;
- ROFF_DEBUG("roff: cond override: %s -> deny\n",
- roffs[tok].name);
+ /*
+ * Resize the storage for the macro
+ * and readjust the parse pointer.
+ */
+
+ buf->sz += asz - 3;
+ n2 = mandoc_realloc(n1, buf->sz);
+ cp = n2 + (cp - n1);
+ n1 = n2;
+
+ /*
+ * When growing, make room
+ * for the expanded argument.
+ */
+
+ if (asz > 3)
+ memmove(cp + asz, cp + 3, rsz);
+ }
+
+ /* Copy the expanded argument, escaping quotes. */
+
+ n2 = cp;
+ for (i = ib; i <= ie; i++) {
+ for (ap = arg[i]; *ap != '\0'; ap++) {
+ if (*ap == '"') {
+ memcpy(n2, "\\(dq", 4);
+ n2 += 4;
+ } else
+ *n2++ = *ap;
+ }
+ if (i < ie)
+ *n2++ = ' ';
+ }
}
/*
- * Determine scope. If we're invoked with "\{" trailing the
- * conditional, then we're in a multiline scope. Else our scope
- * expires on the next line.
+ * Replace the macro invocation
+ * by the expanded macro.
*/
- r->last->endspan = 1;
+ free(buf->buf);
+ buf->buf = n1;
+ *offs = 0;
- if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) {
- r->last->endspan = -1;
- pos += 2;
- ROFF_DEBUG("roff: cond-scope: %s, multi-line\n",
- roffs[tok].name);
- } else
- ROFF_DEBUG("roff: cond-scope: %s, one-line\n",
- roffs[tok].name);
+ return buf->sz > 1 && buf->buf[buf->sz - 2] == '\n' ?
+ ROFF_REPARSE : ROFF_APPEND;
+}
+
+static size_t
+roff_getname(struct roff *r, char **cpp, int ln, int pos)
+{
+ char *name, *cp;
+ size_t namesz;
+
+ name = *cpp;
+ if ('\0' == *name)
+ return 0;
+
+ /* Read until end of name and terminate it with NUL. */
+ for (cp = name; 1; cp++) {
+ if ('\0' == *cp || ' ' == *cp) {
+ namesz = cp - name;
+ break;
+ }
+ if ('\\' != *cp)
+ continue;
+ namesz = cp - name;
+ if ('{' == cp[1] || '}' == cp[1])
+ break;
+ cp++;
+ if ('\\' == *cp)
+ continue;
+ mandoc_vmsg(MANDOCERR_NAMESC, r->parse, ln, pos,
+ "%.*s", (int)(cp - name + 1), name);
+ mandoc_escape((const char **)&cp, NULL, NULL);
+ break;
+ }
+
+ /* Read past spaces. */
+ while (' ' == *cp)
+ cp++;
+
+ *cpp = cp;
+ return namesz;
+}
+
+/*
+ * Store *string into the user-defined string called *name.
+ * To clear an existing entry, call with (*r, *name, NULL, 0).
+ * append == 0: replace mode
+ * append == 1: single-line append mode
+ * append == 2: multiline append mode, append '\n' after each call
+ */
+static void
+roff_setstr(struct roff *r, const char *name, const char *string,
+ int append)
+{
+
+ roff_setstrn(&r->strtab, name, strlen(name), string,
+ string ? strlen(string) : 0, append);
+}
+
+static void
+roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
+ const char *string, size_t stringsz, int append)
+{
+ struct roffkv *n;
+ char *c;
+ int i;
+ size_t oldch, newch;
+
+ /* Search for an existing string with the same name. */
+ n = *r;
+
+ while (n && (namesz != n->key.sz ||
+ strncmp(n->key.p, name, namesz)))
+ n = n->next;
+
+ if (NULL == n) {
+ /* Create a new string table entry. */
+ n = mandoc_malloc(sizeof(struct roffkv));
+ n->key.p = mandoc_strndup(name, namesz);
+ n->key.sz = namesz;
+ n->val.p = NULL;
+ n->val.sz = 0;
+ n->next = *r;
+ *r = n;
+ } else if (0 == append) {
+ free(n->val.p);
+ n->val.p = NULL;
+ n->val.sz = 0;
+ }
+
+ if (NULL == string)
+ return;
/*
- * If there are no arguments on the line, the next-line scope is
- * assumed.
+ * One additional byte for the '\n' in multiline mode,
+ * and one for the terminating '\0'.
*/
+ newch = stringsz + (1 < append ? 2u : 1u);
+
+ if (NULL == n->val.p) {
+ n->val.p = mandoc_malloc(newch);
+ *n->val.p = '\0';
+ oldch = 0;
+ } else {
+ oldch = n->val.sz;
+ n->val.p = mandoc_realloc(n->val.p, oldch + newch);
+ }
- if ('\0' == (*bufp)[pos])
- return(ROFF_IGN);
+ /* Skip existing content in the destination buffer. */
+ c = n->val.p + (int)oldch;
+
+ /* Append new content to the destination buffer. */
+ i = 0;
+ while (i < (int)stringsz) {
+ /*
+ * Rudimentary roff copy mode:
+ * Handle escaped backslashes.
+ */
+ if ('\\' == string[i] && '\\' == string[i + 1])
+ i++;
+ *c++ = string[i++];
+ }
- /* Otherwise re-run the roff parser after recalculating. */
+ /* Append terminating bytes. */
+ if (1 < append)
+ *c++ = '\n';
- *offs = pos;
- return(ROFF_RERUN);
+ *c = '\0';
+ n->val.sz = (int)(c - n->val.p);
}
+static const char *
+roff_getstrn(const struct roff *r, const char *name, size_t len)
+{
+ const struct roffkv *n;
+ int i;
-/* ARGSUSED */
-static enum rofferr
-roff_nr(ROFF_ARGS)
+ for (n = r->strtab; n; n = n->next)
+ if (0 == strncmp(name, n->key.p, len) &&
+ '\0' == n->key.p[(int)len])
+ return n->val.p;
+
+ for (i = 0; i < PREDEFS_MAX; i++)
+ if (0 == strncmp(name, predefs[i].name, len) &&
+ '\0' == predefs[i].name[(int)len])
+ return predefs[i].str;
+
+ return NULL;
+}
+
+static void
+roff_freestr(struct roffkv *r)
{
- const char *key, *val;
+ struct roffkv *n, *nn;
+
+ for (n = r; n; n = nn) {
+ free(n->key.p);
+ free(n->val.p);
+ nn = n->next;
+ free(n);
+ }
+}
- key = &(*bufp)[pos];
+/* --- accessors and utility functions ------------------------------------ */
- /* Parse register request. */
- while ((*bufp)[pos] && ' ' != (*bufp)[pos])
- pos++;
+const struct tbl_span *
+roff_span(const struct roff *r)
+{
+
+ return r->tbl ? tbl_span(r->tbl) : NULL;
+}
+
+const struct eqn *
+roff_eqn(const struct roff *r)
+{
+
+ return r->last_eqn ? &r->last_eqn->eqn : NULL;
+}
+
+/*
+ * Duplicate an input string, making the appropriate character
+ * conversations (as stipulated by `tr') along the way.
+ * Returns a heap-allocated string with all the replacements made.
+ */
+char *
+roff_strdup(const struct roff *r, const char *p)
+{
+ const struct roffkv *cp;
+ char *res;
+ const char *pp;
+ size_t ssz, sz;
+ enum mandoc_esc esc;
+
+ if (NULL == r->xmbtab && NULL == r->xtab)
+ return mandoc_strdup(p);
+ else if ('\0' == *p)
+ return mandoc_strdup("");
/*
- * Set our nil terminator. Because this line is going to be
- * ignored anyway, we can munge it as we please.
+ * Step through each character looking for term matches
+ * (remember that a `tr' can be invoked with an escape, which is
+ * a glyph but the escape is multi-character).
+ * We only do this if the character hash has been initialised
+ * and the string is >0 length.
*/
- if ((*bufp)[pos])
- (*bufp)[pos++] = '\0';
- /* Skip whitespace to register token. */
- while ((*bufp)[pos] && ' ' == (*bufp)[pos])
- pos++;
+ res = NULL;
+ ssz = 0;
+
+ while ('\0' != *p) {
+ if ('\\' != *p && r->xtab && r->xtab[(int)*p].p) {
+ sz = r->xtab[(int)*p].sz;
+ res = mandoc_realloc(res, ssz + sz + 1);
+ memcpy(res + ssz, r->xtab[(int)*p].p, sz);
+ ssz += sz;
+ p++;
+ continue;
+ } else if ('\\' != *p) {
+ res = mandoc_realloc(res, ssz + 2);
+ res[ssz++] = *p++;
+ continue;
+ }
- val = &(*bufp)[pos];
+ /* Search for term matches. */
+ for (cp = r->xmbtab; cp; cp = cp->next)
+ if (0 == strncmp(p, cp->key.p, cp->key.sz))
+ break;
+
+ if (NULL != cp) {
+ /*
+ * A match has been found.
+ * Append the match to the array and move
+ * forward by its keysize.
+ */
+ res = mandoc_realloc(res,
+ ssz + cp->val.sz + 1);
+ memcpy(res + ssz, cp->val.p, cp->val.sz);
+ ssz += cp->val.sz;
+ p += (int)cp->key.sz;
+ continue;
+ }
- /* Process register token. */
+ /*
+ * Handle escapes carefully: we need to copy
+ * over just the escape itself, or else we might
+ * do replacements within the escape itself.
+ * Make sure to pass along the bogus string.
+ */
+ pp = p++;
+ esc = mandoc_escape(&p, NULL, NULL);
+ if (ESCAPE_ERROR == esc) {
+ sz = strlen(pp);
+ res = mandoc_realloc(res, ssz + sz + 1);
+ memcpy(res + ssz, pp, sz);
+ break;
+ }
+ /*
+ * We bail out on bad escapes.
+ * No need to warn: we already did so when
+ * roff_res() was called.
+ */
+ sz = (int)(p - pp);
+ res = mandoc_realloc(res, ssz + sz + 1);
+ memcpy(res + ssz, pp, sz);
+ ssz += sz;
+ }
- if (0 == strcmp(key, "nS")) {
- if ( ! roff_parse_nat(val, &r->regs->regs[(int)REG_nS].i))
- r->regs->regs[(int)REG_nS].i = 0;
+ res[(int)ssz] = '\0';
+ return res;
+}
- ROFF_DEBUG("roff: register nS: %d\n",
- r->regs->regs[(int)REG_nS].i);
- } else
- ROFF_DEBUG("roff: ignoring register: %s\n", key);
+int
+roff_getformat(const struct roff *r)
+{
+
+ return r->format;
+}
+
+/*
+ * Find out whether a line is a macro line or not.
+ * If it is, adjust the current position and return one; if it isn't,
+ * return zero and don't change the current position.
+ * If the control character has been set with `.cc', then let that grain
+ * precedence.
+ * This is slighly contrary to groff, where using the non-breaking
+ * control character when `cc' has been invoked will cause the
+ * non-breaking macro contents to be printed verbatim.
+ */
+int
+roff_getcontrol(const struct roff *r, const char *cp, int *ppos)
+{
+ int pos;
+
+ pos = *ppos;
+
+ if (0 != r->control && cp[pos] == r->control)
+ pos++;
+ else if (0 != r->control)
+ return 0;
+ else if ('\\' == cp[pos] && '.' == cp[pos + 1])
+ pos += 2;
+ else if ('.' == cp[pos] || '\'' == cp[pos])
+ pos++;
+ else
+ return 0;
+
+ while (' ' == cp[pos] || '\t' == cp[pos])
+ pos++;
- return(ROFF_IGN);
+ *ppos = pos;
+ return 1;
}
git.ckatri.com / mandoc.git / blobdiff