1769 lines
37 KiB
C
1769 lines
37 KiB
C
/* $Id: roff.c,v 1.172 2011/10/24 21:41:45 schwarze Exp $ */
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/*
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* Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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* Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <assert.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include "mandoc.h"
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#include "libroff.h"
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#include "libmandoc.h"
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/* Maximum number of nested if-else conditionals. */
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#define RSTACK_MAX 128
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/* Maximum number of string expansions per line, to break infinite loops. */
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#define EXPAND_LIMIT 1000
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enum rofft {
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ROFF_ad,
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ROFF_am,
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ROFF_ami,
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ROFF_am1,
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ROFF_de,
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ROFF_dei,
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ROFF_de1,
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ROFF_ds,
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ROFF_el,
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ROFF_hy,
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ROFF_ie,
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ROFF_if,
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ROFF_ig,
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ROFF_it,
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ROFF_ne,
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ROFF_nh,
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ROFF_nr,
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ROFF_ns,
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ROFF_ps,
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ROFF_rm,
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ROFF_so,
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ROFF_ta,
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ROFF_tr,
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ROFF_TS,
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ROFF_TE,
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ROFF_T_,
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ROFF_EQ,
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ROFF_EN,
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ROFF_cblock,
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ROFF_ccond,
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ROFF_USERDEF,
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ROFF_MAX
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};
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enum roffrule {
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ROFFRULE_ALLOW,
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ROFFRULE_DENY
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};
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/*
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* A single register entity. If "set" is zero, the value of the
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* register should be the default one, which is per-register.
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* Registers are assumed to be unsigned ints for now.
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*/
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struct reg {
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int set; /* whether set or not */
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unsigned int u; /* unsigned integer */
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};
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/*
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* An incredibly-simple string buffer.
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*/
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struct roffstr {
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char *p; /* nil-terminated buffer */
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size_t sz; /* saved strlen(p) */
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};
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/*
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* A key-value roffstr pair as part of a singly-linked list.
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*/
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struct roffkv {
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struct roffstr key;
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struct roffstr val;
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struct roffkv *next; /* next in list */
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};
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struct roff {
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struct mparse *parse; /* parse point */
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struct roffnode *last; /* leaf of stack */
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enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */
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int rstackpos; /* position in rstack */
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struct reg regs[REG__MAX];
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struct roffkv *strtab; /* user-defined strings & macros */
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struct roffkv *xmbtab; /* multi-byte trans table (`tr') */
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struct roffstr *xtab; /* single-byte trans table (`tr') */
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const char *current_string; /* value of last called user macro */
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struct tbl_node *first_tbl; /* first table parsed */
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struct tbl_node *last_tbl; /* last table parsed */
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struct tbl_node *tbl; /* current table being parsed */
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struct eqn_node *last_eqn; /* last equation parsed */
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struct eqn_node *first_eqn; /* first equation parsed */
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struct eqn_node *eqn; /* current equation being parsed */
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};
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struct roffnode {
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enum rofft tok; /* type of node */
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struct roffnode *parent; /* up one in stack */
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int line; /* parse line */
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int col; /* parse col */
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char *name; /* node name, e.g. macro name */
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char *end; /* end-rules: custom token */
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int endspan; /* end-rules: next-line or infty */
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enum roffrule rule; /* current evaluation rule */
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};
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#define ROFF_ARGS struct roff *r, /* parse ctx */ \
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enum rofft tok, /* tok of macro */ \
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char **bufp, /* input buffer */ \
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size_t *szp, /* size of input buffer */ \
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int ln, /* parse line */ \
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int ppos, /* original pos in buffer */ \
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int pos, /* current pos in buffer */ \
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int *offs /* reset offset of buffer data */
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typedef enum rofferr (*roffproc)(ROFF_ARGS);
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struct roffmac {
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const char *name; /* macro name */
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roffproc proc; /* process new macro */
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roffproc text; /* process as child text of macro */
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roffproc sub; /* process as child of macro */
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int flags;
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#define ROFFMAC_STRUCT (1 << 0) /* always interpret */
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struct roffmac *next;
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};
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struct predef {
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const char *name; /* predefined input name */
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const char *str; /* replacement symbol */
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};
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#define PREDEF(__name, __str) \
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{ (__name), (__str) },
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static enum rofft roffhash_find(const char *, size_t);
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static void roffhash_init(void);
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static void roffnode_cleanscope(struct roff *);
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static void roffnode_pop(struct roff *);
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static void roffnode_push(struct roff *, enum rofft,
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const char *, int, int);
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static enum rofferr roff_block(ROFF_ARGS);
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static enum rofferr roff_block_text(ROFF_ARGS);
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static enum rofferr roff_block_sub(ROFF_ARGS);
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static enum rofferr roff_cblock(ROFF_ARGS);
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static enum rofferr roff_ccond(ROFF_ARGS);
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static enum rofferr roff_cond(ROFF_ARGS);
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static enum rofferr roff_cond_text(ROFF_ARGS);
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static enum rofferr roff_cond_sub(ROFF_ARGS);
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static enum rofferr roff_ds(ROFF_ARGS);
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static enum roffrule roff_evalcond(const char *, int *);
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static void roff_free1(struct roff *);
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static void roff_freestr(struct roffkv *);
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static char *roff_getname(struct roff *, char **, int, int);
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static const char *roff_getstrn(const struct roff *,
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const char *, size_t);
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static enum rofferr roff_line_ignore(ROFF_ARGS);
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static enum rofferr roff_nr(ROFF_ARGS);
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static void roff_openeqn(struct roff *, const char *,
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int, int, const char *);
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static enum rofft roff_parse(struct roff *, const char *, int *);
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static enum rofferr roff_parsetext(char *);
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static enum rofferr roff_res(struct roff *,
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char **, size_t *, int, int);
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static enum rofferr roff_rm(ROFF_ARGS);
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static void roff_setstr(struct roff *,
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const char *, const char *, int);
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static void roff_setstrn(struct roffkv **, const char *,
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size_t, const char *, size_t, int);
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static enum rofferr roff_so(ROFF_ARGS);
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static enum rofferr roff_tr(ROFF_ARGS);
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static enum rofferr roff_TE(ROFF_ARGS);
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static enum rofferr roff_TS(ROFF_ARGS);
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static enum rofferr roff_EQ(ROFF_ARGS);
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static enum rofferr roff_EN(ROFF_ARGS);
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static enum rofferr roff_T_(ROFF_ARGS);
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static enum rofferr roff_userdef(ROFF_ARGS);
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/* See roffhash_find() */
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#define ASCII_HI 126
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#define ASCII_LO 33
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#define HASHWIDTH (ASCII_HI - ASCII_LO + 1)
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static struct roffmac *hash[HASHWIDTH];
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static struct roffmac roffs[ROFF_MAX] = {
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{ "ad", roff_line_ignore, NULL, NULL, 0, NULL },
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{ "am", roff_block, roff_block_text, roff_block_sub, 0, NULL },
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{ "ami", roff_block, roff_block_text, roff_block_sub, 0, NULL },
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{ "am1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
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{ "de", roff_block, roff_block_text, roff_block_sub, 0, NULL },
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{ "dei", roff_block, roff_block_text, roff_block_sub, 0, NULL },
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{ "de1", roff_block, roff_block_text, roff_block_sub, 0, NULL },
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{ "ds", roff_ds, NULL, NULL, 0, NULL },
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{ "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
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{ "hy", roff_line_ignore, NULL, NULL, 0, NULL },
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{ "ie", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
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{ "if", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },
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{ "ig", roff_block, roff_block_text, roff_block_sub, 0, NULL },
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{ "it", roff_line_ignore, NULL, NULL, 0, NULL },
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{ "ne", roff_line_ignore, NULL, NULL, 0, NULL },
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{ "nh", roff_line_ignore, NULL, NULL, 0, NULL },
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{ "nr", roff_nr, NULL, NULL, 0, NULL },
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{ "ns", roff_line_ignore, NULL, NULL, 0, NULL },
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{ "ps", roff_line_ignore, NULL, NULL, 0, NULL },
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{ "rm", roff_rm, NULL, NULL, 0, NULL },
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{ "so", roff_so, NULL, NULL, 0, NULL },
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{ "ta", roff_line_ignore, NULL, NULL, 0, NULL },
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{ "tr", roff_tr, NULL, NULL, 0, NULL },
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{ "TS", roff_TS, NULL, NULL, 0, NULL },
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{ "TE", roff_TE, NULL, NULL, 0, NULL },
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{ "T&", roff_T_, NULL, NULL, 0, NULL },
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{ "EQ", roff_EQ, NULL, NULL, 0, NULL },
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{ "EN", roff_EN, NULL, NULL, 0, NULL },
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{ ".", roff_cblock, NULL, NULL, 0, NULL },
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{ "\\}", roff_ccond, NULL, NULL, 0, NULL },
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{ NULL, roff_userdef, NULL, NULL, 0, NULL },
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};
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/* Array of injected predefined strings. */
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#define PREDEFS_MAX 38
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static const struct predef predefs[PREDEFS_MAX] = {
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#include "predefs.in"
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};
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/* See roffhash_find() */
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#define ROFF_HASH(p) (p[0] - ASCII_LO)
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static void
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roffhash_init(void)
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{
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struct roffmac *n;
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int buc, i;
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for (i = 0; i < (int)ROFF_USERDEF; i++) {
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assert(roffs[i].name[0] >= ASCII_LO);
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assert(roffs[i].name[0] <= ASCII_HI);
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buc = ROFF_HASH(roffs[i].name);
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if (NULL != (n = hash[buc])) {
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for ( ; n->next; n = n->next)
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/* Do nothing. */ ;
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n->next = &roffs[i];
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} else
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hash[buc] = &roffs[i];
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}
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}
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/*
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* Look up a roff token by its name. Returns ROFF_MAX if no macro by
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* the nil-terminated string name could be found.
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*/
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static enum rofft
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roffhash_find(const char *p, size_t s)
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{
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int buc;
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struct roffmac *n;
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/*
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* libroff has an extremely simple hashtable, for the time
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* being, which simply keys on the first character, which must
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* be printable, then walks a chain. It works well enough until
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* optimised.
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*/
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if (p[0] < ASCII_LO || p[0] > ASCII_HI)
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return(ROFF_MAX);
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buc = ROFF_HASH(p);
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if (NULL == (n = hash[buc]))
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return(ROFF_MAX);
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for ( ; n; n = n->next)
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if (0 == strncmp(n->name, p, s) && '\0' == n->name[(int)s])
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return((enum rofft)(n - roffs));
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return(ROFF_MAX);
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}
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/*
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* Pop the current node off of the stack of roff instructions currently
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* pending.
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*/
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static void
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roffnode_pop(struct roff *r)
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{
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struct roffnode *p;
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assert(r->last);
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p = r->last;
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r->last = r->last->parent;
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free(p->name);
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free(p->end);
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free(p);
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}
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/*
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* Push a roff node onto the instruction stack. This must later be
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* removed with roffnode_pop().
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*/
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static void
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roffnode_push(struct roff *r, enum rofft tok, const char *name,
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int line, int col)
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{
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struct roffnode *p;
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p = mandoc_calloc(1, sizeof(struct roffnode));
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p->tok = tok;
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if (name)
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p->name = mandoc_strdup(name);
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p->parent = r->last;
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p->line = line;
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p->col = col;
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p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY;
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r->last = p;
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}
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static void
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roff_free1(struct roff *r)
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{
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struct tbl_node *t;
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struct eqn_node *e;
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int i;
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while (NULL != (t = r->first_tbl)) {
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r->first_tbl = t->next;
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tbl_free(t);
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}
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r->first_tbl = r->last_tbl = r->tbl = NULL;
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while (NULL != (e = r->first_eqn)) {
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r->first_eqn = e->next;
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eqn_free(e);
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}
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r->first_eqn = r->last_eqn = r->eqn = NULL;
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while (r->last)
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roffnode_pop(r);
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roff_freestr(r->strtab);
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roff_freestr(r->xmbtab);
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r->strtab = r->xmbtab = NULL;
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if (r->xtab)
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for (i = 0; i < 128; i++)
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free(r->xtab[i].p);
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free(r->xtab);
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r->xtab = NULL;
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}
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void
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roff_reset(struct roff *r)
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{
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int i;
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roff_free1(r);
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memset(&r->regs, 0, sizeof(struct reg) * REG__MAX);
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for (i = 0; i < PREDEFS_MAX; i++)
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roff_setstr(r, predefs[i].name, predefs[i].str, 0);
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}
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void
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roff_free(struct roff *r)
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{
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roff_free1(r);
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free(r);
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}
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struct roff *
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roff_alloc(struct mparse *parse)
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{
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struct roff *r;
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int i;
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r = mandoc_calloc(1, sizeof(struct roff));
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r->parse = parse;
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r->rstackpos = -1;
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roffhash_init();
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for (i = 0; i < PREDEFS_MAX; i++)
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roff_setstr(r, predefs[i].name, predefs[i].str, 0);
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return(r);
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}
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/*
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* Pre-filter each and every line for reserved words (one beginning with
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* `\*', e.g., `\*(ab'). These must be handled before the actual line
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* is processed.
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* This also checks the syntax of regular escapes.
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*/
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static enum rofferr
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roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)
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{
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enum mandoc_esc esc;
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const char *stesc; /* start of an escape sequence ('\\') */
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const char *stnam; /* start of the name, after "[(*" */
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const char *cp; /* end of the name, e.g. before ']' */
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const char *res; /* the string to be substituted */
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int i, maxl, expand_count;
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size_t nsz;
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char *n;
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expand_count = 0;
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again:
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cp = *bufp + pos;
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while (NULL != (cp = strchr(cp, '\\'))) {
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stesc = cp++;
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/*
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* The second character must be an asterisk.
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* If it isn't, skip it anyway: It is escaped,
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* so it can't start another escape sequence.
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*/
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if ('\0' == *cp)
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return(ROFF_CONT);
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if ('*' != *cp) {
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res = cp;
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esc = mandoc_escape(&cp, NULL, NULL);
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if (ESCAPE_ERROR != esc)
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continue;
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cp = res;
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mandoc_msg
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(MANDOCERR_BADESCAPE, r->parse,
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ln, (int)(stesc - *bufp), NULL);
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return(ROFF_CONT);
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}
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cp++;
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/*
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* The third character decides the length
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* of the name of the string.
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* Save a pointer to the name.
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*/
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switch (*cp) {
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case ('\0'):
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return(ROFF_CONT);
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case ('('):
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cp++;
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maxl = 2;
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break;
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case ('['):
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cp++;
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maxl = 0;
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break;
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default:
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maxl = 1;
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break;
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}
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stnam = cp;
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/* Advance to the end of the name. */
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for (i = 0; 0 == maxl || i < maxl; i++, cp++) {
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if ('\0' == *cp) {
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mandoc_msg
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(MANDOCERR_BADESCAPE,
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r->parse, ln,
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(int)(stesc - *bufp), NULL);
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return(ROFF_CONT);
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}
|
|
if (0 == maxl && ']' == *cp)
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Retrieve the replacement string; if it is
|
|
* undefined, resume searching for escapes.
|
|
*/
|
|
|
|
res = roff_getstrn(r, stnam, (size_t)i);
|
|
|
|
if (NULL == res) {
|
|
mandoc_msg
|
|
(MANDOCERR_BADESCAPE, r->parse,
|
|
ln, (int)(stesc - *bufp), NULL);
|
|
res = "";
|
|
}
|
|
|
|
/* Replace the escape sequence by the string. */
|
|
|
|
pos = stesc - *bufp;
|
|
|
|
nsz = *szp + strlen(res) + 1;
|
|
n = mandoc_malloc(nsz);
|
|
|
|
strlcpy(n, *bufp, (size_t)(stesc - *bufp + 1));
|
|
strlcat(n, res, nsz);
|
|
strlcat(n, cp + (maxl ? 0 : 1), nsz);
|
|
|
|
free(*bufp);
|
|
|
|
*bufp = n;
|
|
*szp = nsz;
|
|
|
|
if (EXPAND_LIMIT >= ++expand_count)
|
|
goto again;
|
|
|
|
/* Just leave the string unexpanded. */
|
|
mandoc_msg(MANDOCERR_ROFFLOOP, r->parse, ln, pos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
return(ROFF_CONT);
|
|
}
|
|
|
|
/*
|
|
* Process text streams: convert all breakable hyphens into ASCII_HYPH.
|
|
*/
|
|
static enum rofferr
|
|
roff_parsetext(char *p)
|
|
{
|
|
size_t sz;
|
|
const char *start;
|
|
enum mandoc_esc esc;
|
|
|
|
start = p;
|
|
|
|
while ('\0' != *p) {
|
|
sz = strcspn(p, "-\\");
|
|
p += sz;
|
|
|
|
if ('\0' == *p)
|
|
break;
|
|
|
|
if ('\\' == *p) {
|
|
/* Skip over escapes. */
|
|
p++;
|
|
esc = mandoc_escape
|
|
((const char **)&p, NULL, NULL);
|
|
if (ESCAPE_ERROR == esc)
|
|
break;
|
|
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, char **bufp,
|
|
size_t *szp, int pos, int *offs)
|
|
{
|
|
enum rofft t;
|
|
enum rofferr e;
|
|
int ppos, ctl;
|
|
|
|
/*
|
|
* Run the reserved-word filter only if we have some reserved
|
|
* words to fill in.
|
|
*/
|
|
|
|
e = roff_res(r, bufp, szp, ln, pos);
|
|
if (ROFF_IGN == e)
|
|
return(e);
|
|
assert(ROFF_CONT == e);
|
|
|
|
ppos = pos;
|
|
ctl = mandoc_getcontrol(*bufp, &pos);
|
|
|
|
/*
|
|
* 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.
|
|
* Finally, if there's an equation scope open, divert it into it
|
|
* no matter our state.
|
|
*/
|
|
|
|
if (r->last && ! ctl) {
|
|
t = r->last->tok;
|
|
assert(roffs[t].text);
|
|
e = (*roffs[t].text)
|
|
(r, t, bufp, szp, ln, pos, pos, offs);
|
|
assert(ROFF_IGN == e || ROFF_CONT == e);
|
|
if (ROFF_CONT != e)
|
|
return(e);
|
|
if (r->eqn)
|
|
return(eqn_read(&r->eqn, ln, *bufp, pos, offs));
|
|
if (r->tbl)
|
|
return(tbl_read(r->tbl, ln, *bufp, pos));
|
|
return(roff_parsetext(*bufp + pos));
|
|
} else if ( ! ctl) {
|
|
if (r->eqn)
|
|
return(eqn_read(&r->eqn, ln, *bufp, pos, offs));
|
|
if (r->tbl)
|
|
return(tbl_read(r->tbl, ln, *bufp, pos));
|
|
return(roff_parsetext(*bufp + pos));
|
|
} else if (r->eqn)
|
|
return(eqn_read(&r->eqn, ln, *bufp, ppos, offs));
|
|
|
|
/*
|
|
* 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, bufp, szp,
|
|
ln, ppos, 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.
|
|
*/
|
|
|
|
if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos)))
|
|
return(ROFF_CONT);
|
|
|
|
assert(roffs[t].proc);
|
|
return((*roffs[t].proc)
|
|
(r, t, bufp, szp,
|
|
ln, ppos, pos, offs));
|
|
}
|
|
|
|
|
|
void
|
|
roff_endparse(struct roff *r)
|
|
{
|
|
|
|
if (r->last)
|
|
mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
|
|
r->last->line, r->last->col, NULL);
|
|
|
|
if (r->eqn) {
|
|
mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
|
|
r->eqn->eqn.ln, r->eqn->eqn.pos, NULL);
|
|
eqn_end(&r->eqn);
|
|
}
|
|
|
|
if (r->tbl) {
|
|
mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
|
|
r->tbl->line, r->tbl->pos, NULL);
|
|
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, const char *buf, int *pos)
|
|
{
|
|
const char *mac;
|
|
size_t maclen;
|
|
enum rofft t;
|
|
|
|
if ('\0' == buf[*pos] || '"' == buf[*pos] ||
|
|
'\t' == buf[*pos] || ' ' == buf[*pos])
|
|
return(ROFF_MAX);
|
|
|
|
/*
|
|
* We stop the macro parse at an escape, tab, space, or nil.
|
|
* However, `\}' is also a valid macro, so make sure we don't
|
|
* clobber it by seeing the `\' as the end of token.
|
|
*/
|
|
|
|
mac = buf + *pos;
|
|
maclen = strcspn(mac + 1, " \\\t\0") + 1;
|
|
|
|
t = (r->current_string = roff_getstrn(r, mac, maclen))
|
|
? ROFF_USERDEF : roffhash_find(mac, maclen);
|
|
|
|
*pos += (int)maclen;
|
|
|
|
while (buf[*pos] && ' ' == buf[*pos])
|
|
(*pos)++;
|
|
|
|
return(t);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
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 (NULL == r->last) {
|
|
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
switch (r->last->tok) {
|
|
case (ROFF_am):
|
|
/* FALLTHROUGH */
|
|
case (ROFF_ami):
|
|
/* FALLTHROUGH */
|
|
case (ROFF_am1):
|
|
/* FALLTHROUGH */
|
|
case (ROFF_de):
|
|
/* ROFF_de1 is remapped to ROFF_de in roff_block(). */
|
|
/* FALLTHROUGH */
|
|
case (ROFF_dei):
|
|
/* FALLTHROUGH */
|
|
case (ROFF_ig):
|
|
break;
|
|
default:
|
|
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
if ((*bufp)[pos])
|
|
mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_ccond(ROFF_ARGS)
|
|
{
|
|
|
|
if (NULL == r->last) {
|
|
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
switch (r->last->tok) {
|
|
case (ROFF_el):
|
|
/* FALLTHROUGH */
|
|
case (ROFF_ie):
|
|
/* FALLTHROUGH */
|
|
case (ROFF_if):
|
|
break;
|
|
default:
|
|
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
if (r->last->endspan > -1) {
|
|
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
if ((*bufp)[pos])
|
|
mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
|
|
|
|
roffnode_pop(r);
|
|
roffnode_cleanscope(r);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_block(ROFF_ARGS)
|
|
{
|
|
int sv;
|
|
size_t sz;
|
|
char *name;
|
|
|
|
name = NULL;
|
|
|
|
if (ROFF_ig != tok) {
|
|
if ('\0' == (*bufp)[pos]) {
|
|
mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/*
|
|
* Re-write `de1', since we don't really care about
|
|
* groff's strange compatibility mode, into `de'.
|
|
*/
|
|
|
|
if (ROFF_de1 == tok)
|
|
tok = ROFF_de;
|
|
if (ROFF_de == tok)
|
|
name = *bufp + pos;
|
|
else
|
|
mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos,
|
|
roffs[tok].name);
|
|
|
|
while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
|
|
pos++;
|
|
|
|
while (isspace((unsigned char)(*bufp)[pos]))
|
|
(*bufp)[pos++] = '\0';
|
|
}
|
|
|
|
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
|
|
* added from roff_block_text() in multiline mode.
|
|
*/
|
|
|
|
if (ROFF_de == tok)
|
|
roff_setstr(r, name, "", 0);
|
|
|
|
if ('\0' == (*bufp)[pos])
|
|
return(ROFF_IGN);
|
|
|
|
/* If present, process the custom end-of-line marker. */
|
|
|
|
sv = pos;
|
|
while ((*bufp)[pos] && ! isspace((unsigned char)(*bufp)[pos]))
|
|
pos++;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
assert(pos > sv);
|
|
sz = (size_t)(pos - sv);
|
|
|
|
if (1 == sz && '.' == (*bufp)[sv])
|
|
return(ROFF_IGN);
|
|
|
|
r->last->end = mandoc_malloc(sz + 1);
|
|
|
|
memcpy(r->last->end, *bufp + sv, sz);
|
|
r->last->end[(int)sz] = '\0';
|
|
|
|
if ((*bufp)[pos])
|
|
mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);
|
|
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
|
|
/* ARGSUSED */
|
|
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 ((*bufp)[i] != r->last->end[j])
|
|
break;
|
|
|
|
if ('\0' == r->last->end[j] &&
|
|
('\0' == (*bufp)[i] ||
|
|
' ' == (*bufp)[i] ||
|
|
'\t' == (*bufp)[i])) {
|
|
roffnode_pop(r);
|
|
roffnode_cleanscope(r);
|
|
|
|
while (' ' == (*bufp)[i] || '\t' == (*bufp)[i])
|
|
i++;
|
|
|
|
pos = i;
|
|
if (ROFF_MAX != roff_parse(r, *bufp, &pos))
|
|
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, *bufp, &pos);
|
|
|
|
/*
|
|
* Macros other than block-end are only significant
|
|
* in `de' blocks; elsewhere, simply throw them away.
|
|
*/
|
|
if (ROFF_cblock != t) {
|
|
if (ROFF_de == tok)
|
|
roff_setstr(r, r->last->name, *bufp + ppos, 1);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
assert(roffs[t].proc);
|
|
return((*roffs[t].proc)(r, t, bufp, szp,
|
|
ln, ppos, pos, offs));
|
|
}
|
|
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_block_text(ROFF_ARGS)
|
|
{
|
|
|
|
if (ROFF_de == tok)
|
|
roff_setstr(r, r->last->name, *bufp + pos, 1);
|
|
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_cond_sub(ROFF_ARGS)
|
|
{
|
|
enum rofft t;
|
|
enum roffrule rr;
|
|
char *ep;
|
|
|
|
rr = r->last->rule;
|
|
roffnode_cleanscope(r);
|
|
|
|
/*
|
|
* If the macro is unknown, first check if it contains a closing
|
|
* delimiter `\}'. If it does, close out our scope and return
|
|
* the currently-scoped rule (ignore or continue). Else, drop
|
|
* into the currently-scoped rule.
|
|
*/
|
|
|
|
if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) {
|
|
ep = &(*bufp)[pos];
|
|
for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
|
|
ep++;
|
|
if ('}' != *ep)
|
|
continue;
|
|
|
|
/*
|
|
* Make the \} go away.
|
|
* This is a little haphazard, as it's not quite
|
|
* clear how nroff does this.
|
|
* If we're at the end of line, then just chop
|
|
* off the \} and resize the buffer.
|
|
* If we aren't, then conver it to spaces.
|
|
*/
|
|
|
|
if ('\0' == *(ep + 1)) {
|
|
*--ep = '\0';
|
|
*szp -= 2;
|
|
} else
|
|
*(ep - 1) = *ep = ' ';
|
|
|
|
roff_ccond(r, ROFF_ccond, bufp, szp,
|
|
ln, pos, pos + 2, offs);
|
|
break;
|
|
}
|
|
return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
|
|
assert(roffs[t].proc);
|
|
return((*roffs[t].proc)(r, t, bufp, szp,
|
|
ln, ppos, pos, offs));
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_cond_text(ROFF_ARGS)
|
|
{
|
|
char *ep;
|
|
enum roffrule rr;
|
|
|
|
rr = r->last->rule;
|
|
roffnode_cleanscope(r);
|
|
|
|
ep = &(*bufp)[pos];
|
|
for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
|
|
ep++;
|
|
if ('}' != *ep)
|
|
continue;
|
|
*ep = '&';
|
|
roff_ccond(r, ROFF_ccond, bufp, szp,
|
|
ln, pos, pos + 2, offs);
|
|
}
|
|
return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
|
|
}
|
|
|
|
static enum roffrule
|
|
roff_evalcond(const char *v, int *pos)
|
|
{
|
|
|
|
switch (v[*pos]) {
|
|
case ('n'):
|
|
(*pos)++;
|
|
return(ROFFRULE_ALLOW);
|
|
case ('e'):
|
|
/* FALLTHROUGH */
|
|
case ('o'):
|
|
/* FALLTHROUGH */
|
|
case ('t'):
|
|
(*pos)++;
|
|
return(ROFFRULE_DENY);
|
|
default:
|
|
break;
|
|
}
|
|
|
|
while (v[*pos] && ' ' != v[*pos])
|
|
(*pos)++;
|
|
return(ROFFRULE_DENY);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_line_ignore(ROFF_ARGS)
|
|
{
|
|
|
|
if (ROFF_it == tok)
|
|
mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos, "it");
|
|
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_cond(ROFF_ARGS)
|
|
{
|
|
int sv;
|
|
enum roffrule rule;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
rule = ROFF_el == tok ?
|
|
(r->rstackpos < 0 ?
|
|
ROFFRULE_DENY : r->rstack[r->rstackpos--]) :
|
|
roff_evalcond(*bufp, &pos);
|
|
|
|
sv = pos;
|
|
while (' ' == (*bufp)[pos])
|
|
pos++;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
if ('\0' == (*bufp)[pos] && sv != pos) {
|
|
mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
roffnode_push(r, tok, NULL, ln, ppos);
|
|
|
|
r->last->rule = rule;
|
|
|
|
/*
|
|
* An if-else will put the NEGATION of the current evaluated
|
|
* conditional into the stack of rules.
|
|
*/
|
|
|
|
if (ROFF_ie == tok) {
|
|
if (r->rstackpos == RSTACK_MAX - 1) {
|
|
mandoc_msg(MANDOCERR_MEM,
|
|
r->parse, ln, ppos, NULL);
|
|
return(ROFF_ERR);
|
|
}
|
|
r->rstack[++r->rstackpos] =
|
|
ROFFRULE_DENY == r->last->rule ?
|
|
ROFFRULE_ALLOW : ROFFRULE_DENY;
|
|
}
|
|
|
|
/* If the parent has false as its rule, then so do we. */
|
|
|
|
if (r->last->parent && ROFFRULE_DENY == r->last->parent->rule)
|
|
r->last->rule = ROFFRULE_DENY;
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
r->last->endspan = 1;
|
|
|
|
if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) {
|
|
r->last->endspan = -1;
|
|
pos += 2;
|
|
}
|
|
|
|
/*
|
|
* If there are no arguments on the line, the next-line scope is
|
|
* assumed.
|
|
*/
|
|
|
|
if ('\0' == (*bufp)[pos])
|
|
return(ROFF_IGN);
|
|
|
|
/* Otherwise re-run the roff parser after recalculating. */
|
|
|
|
*offs = pos;
|
|
return(ROFF_RERUN);
|
|
}
|
|
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_ds(ROFF_ARGS)
|
|
{
|
|
char *name, *string;
|
|
|
|
/*
|
|
* A symbol is named by the first word following the macro
|
|
* invocation up to a space. Its value is anything after the
|
|
* name's trailing whitespace and optional double-quote. Thus,
|
|
*
|
|
* [.ds foo "bar " ]
|
|
*
|
|
* will have `bar " ' as its value.
|
|
*/
|
|
|
|
string = *bufp + pos;
|
|
name = roff_getname(r, &string, ln, pos);
|
|
if ('\0' == *name)
|
|
return(ROFF_IGN);
|
|
|
|
/* Read past initial double-quote. */
|
|
if ('"' == *string)
|
|
string++;
|
|
|
|
/* The rest is the value. */
|
|
roff_setstr(r, name, string, 0);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
int
|
|
roff_regisset(const struct roff *r, enum regs reg)
|
|
{
|
|
|
|
return(r->regs[(int)reg].set);
|
|
}
|
|
|
|
unsigned int
|
|
roff_regget(const struct roff *r, enum regs reg)
|
|
{
|
|
|
|
return(r->regs[(int)reg].u);
|
|
}
|
|
|
|
void
|
|
roff_regunset(struct roff *r, enum regs reg)
|
|
{
|
|
|
|
r->regs[(int)reg].set = 0;
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_nr(ROFF_ARGS)
|
|
{
|
|
const char *key;
|
|
char *val;
|
|
int iv;
|
|
|
|
val = *bufp + pos;
|
|
key = roff_getname(r, &val, ln, pos);
|
|
|
|
if (0 == strcmp(key, "nS")) {
|
|
r->regs[(int)REG_nS].set = 1;
|
|
if ((iv = mandoc_strntoi(val, strlen(val), 10)) >= 0)
|
|
r->regs[(int)REG_nS].u = (unsigned)iv;
|
|
else
|
|
r->regs[(int)REG_nS].u = 0u;
|
|
}
|
|
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_rm(ROFF_ARGS)
|
|
{
|
|
const char *name;
|
|
char *cp;
|
|
|
|
cp = *bufp + pos;
|
|
while ('\0' != *cp) {
|
|
name = roff_getname(r, &cp, ln, (int)(cp - *bufp));
|
|
if ('\0' != *name)
|
|
roff_setstr(r, name, NULL, 0);
|
|
}
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_TE(ROFF_ARGS)
|
|
{
|
|
|
|
if (NULL == r->tbl)
|
|
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
|
|
else
|
|
tbl_end(&r->tbl);
|
|
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_T_(ROFF_ARGS)
|
|
{
|
|
|
|
if (NULL == r->tbl)
|
|
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
|
|
else
|
|
tbl_restart(ppos, ln, r->tbl);
|
|
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
#if 0
|
|
static int
|
|
roff_closeeqn(struct roff *r)
|
|
{
|
|
|
|
return(r->eqn && ROFF_EQN == eqn_end(&r->eqn) ? 1 : 0);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
roff_openeqn(struct roff *r, const char *name, int line,
|
|
int offs, const char *buf)
|
|
{
|
|
struct eqn_node *e;
|
|
int poff;
|
|
|
|
assert(NULL == r->eqn);
|
|
e = eqn_alloc(name, offs, line, r->parse);
|
|
|
|
if (r->last_eqn)
|
|
r->last_eqn->next = e;
|
|
else
|
|
r->first_eqn = r->last_eqn = e;
|
|
|
|
r->eqn = r->last_eqn = e;
|
|
|
|
if (buf) {
|
|
poff = 0;
|
|
eqn_read(&r->eqn, line, buf, offs, &poff);
|
|
}
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_EQ(ROFF_ARGS)
|
|
{
|
|
|
|
roff_openeqn(r, *bufp + pos, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_EN(ROFF_ARGS)
|
|
{
|
|
|
|
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_TS(ROFF_ARGS)
|
|
{
|
|
struct tbl_node *t;
|
|
|
|
if (r->tbl) {
|
|
mandoc_msg(MANDOCERR_SCOPEBROKEN, r->parse, ln, ppos, NULL);
|
|
tbl_end(&r->tbl);
|
|
}
|
|
|
|
t = tbl_alloc(ppos, ln, r->parse);
|
|
|
|
if (r->last_tbl)
|
|
r->last_tbl->next = t;
|
|
else
|
|
r->first_tbl = r->last_tbl = t;
|
|
|
|
r->tbl = r->last_tbl = t;
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_tr(ROFF_ARGS)
|
|
{
|
|
const char *p, *first, *second;
|
|
size_t fsz, ssz;
|
|
enum mandoc_esc esc;
|
|
|
|
p = *bufp + pos;
|
|
|
|
if ('\0' == *p) {
|
|
mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
while ('\0' != *p) {
|
|
fsz = ssz = 1;
|
|
|
|
first = p++;
|
|
if ('\\' == *first) {
|
|
esc = mandoc_escape(&p, NULL, NULL);
|
|
if (ESCAPE_ERROR == esc) {
|
|
mandoc_msg
|
|
(MANDOCERR_BADESCAPE, r->parse,
|
|
ln, (int)(p - *bufp), NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
fsz = (size_t)(p - first);
|
|
}
|
|
|
|
second = p++;
|
|
if ('\\' == *second) {
|
|
esc = mandoc_escape(&p, NULL, NULL);
|
|
if (ESCAPE_ERROR == esc) {
|
|
mandoc_msg
|
|
(MANDOCERR_BADESCAPE, r->parse,
|
|
ln, (int)(p - *bufp), NULL);
|
|
return(ROFF_IGN);
|
|
}
|
|
ssz = (size_t)(p - second);
|
|
} else if ('\0' == *second) {
|
|
mandoc_msg(MANDOCERR_ARGCOUNT, r->parse,
|
|
ln, (int)(p - *bufp), NULL);
|
|
second = " ";
|
|
p--;
|
|
}
|
|
|
|
if (fsz > 1) {
|
|
roff_setstrn(&r->xmbtab, first,
|
|
fsz, second, ssz, 0);
|
|
continue;
|
|
}
|
|
|
|
if (NULL == r->xtab)
|
|
r->xtab = mandoc_calloc
|
|
(128, sizeof(struct roffstr));
|
|
|
|
free(r->xtab[(int)*first].p);
|
|
r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
|
|
r->xtab[(int)*first].sz = ssz;
|
|
}
|
|
|
|
return(ROFF_IGN);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_so(ROFF_ARGS)
|
|
{
|
|
char *name;
|
|
|
|
mandoc_msg(MANDOCERR_SO, r->parse, ln, ppos, NULL);
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
name = *bufp + pos;
|
|
if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) {
|
|
mandoc_msg(MANDOCERR_SOPATH, r->parse, ln, pos, NULL);
|
|
return(ROFF_ERR);
|
|
}
|
|
|
|
*offs = pos;
|
|
return(ROFF_SO);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static enum rofferr
|
|
roff_userdef(ROFF_ARGS)
|
|
{
|
|
const char *arg[9];
|
|
char *cp, *n1, *n2;
|
|
int i;
|
|
|
|
/*
|
|
* Collect pointers to macro argument strings
|
|
* and null-terminate them.
|
|
*/
|
|
cp = *bufp + pos;
|
|
for (i = 0; i < 9; i++)
|
|
arg[i] = '\0' == *cp ? "" :
|
|
mandoc_getarg(r->parse, &cp, ln, &pos);
|
|
|
|
/*
|
|
* Expand macro arguments.
|
|
*/
|
|
*szp = 0;
|
|
n1 = cp = mandoc_strdup(r->current_string);
|
|
while (NULL != (cp = strstr(cp, "\\$"))) {
|
|
i = cp[2] - '1';
|
|
if (0 > i || 8 < i) {
|
|
/* Not an argument invocation. */
|
|
cp += 2;
|
|
continue;
|
|
}
|
|
|
|
*szp = strlen(n1) - 3 + strlen(arg[i]) + 1;
|
|
n2 = mandoc_malloc(*szp);
|
|
|
|
strlcpy(n2, n1, (size_t)(cp - n1 + 1));
|
|
strlcat(n2, arg[i], *szp);
|
|
strlcat(n2, cp + 3, *szp);
|
|
|
|
cp = n2 + (cp - n1);
|
|
free(n1);
|
|
n1 = n2;
|
|
}
|
|
|
|
/*
|
|
* Replace the macro invocation
|
|
* by the expanded macro.
|
|
*/
|
|
free(*bufp);
|
|
*bufp = n1;
|
|
if (0 == *szp)
|
|
*szp = strlen(*bufp) + 1;
|
|
|
|
return(*szp > 1 && '\n' == (*bufp)[(int)*szp - 2] ?
|
|
ROFF_REPARSE : ROFF_APPEND);
|
|
}
|
|
|
|
static char *
|
|
roff_getname(struct roff *r, char **cpp, int ln, int pos)
|
|
{
|
|
char *name, *cp;
|
|
|
|
name = *cpp;
|
|
if ('\0' == *name)
|
|
return(name);
|
|
|
|
/* Read until end of name. */
|
|
for (cp = name; '\0' != *cp && ' ' != *cp; cp++) {
|
|
if ('\\' != *cp)
|
|
continue;
|
|
cp++;
|
|
if ('\\' == *cp)
|
|
continue;
|
|
mandoc_msg(MANDOCERR_NAMESC, r->parse, ln, pos, NULL);
|
|
*cp = '\0';
|
|
name = cp;
|
|
}
|
|
|
|
/* Nil-terminate name. */
|
|
if ('\0' != *cp)
|
|
*(cp++) = '\0';
|
|
|
|
/* Read past spaces. */
|
|
while (' ' == *cp)
|
|
cp++;
|
|
|
|
*cpp = cp;
|
|
return(name);
|
|
}
|
|
|
|
/*
|
|
* Store *string into the user-defined string called *name.
|
|
* In multiline mode, append to an existing entry and append '\n';
|
|
* else replace the existing entry, if there is one.
|
|
* To clear an existing entry, call with (*r, *name, NULL, 0).
|
|
*/
|
|
static void
|
|
roff_setstr(struct roff *r, const char *name, const char *string,
|
|
int multiline)
|
|
{
|
|
|
|
roff_setstrn(&r->strtab, name, strlen(name), string,
|
|
string ? strlen(string) : 0, multiline);
|
|
}
|
|
|
|
static void
|
|
roff_setstrn(struct roffkv **r, const char *name, size_t namesz,
|
|
const char *string, size_t stringsz, int multiline)
|
|
{
|
|
struct roffkv *n;
|
|
char *c;
|
|
int i;
|
|
size_t oldch, newch;
|
|
|
|
/* Search for an existing string with the same name. */
|
|
n = *r;
|
|
|
|
while (n && strcmp(name, n->key.p))
|
|
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 == multiline) {
|
|
/* In multiline mode, append; else replace. */
|
|
free(n->val.p);
|
|
n->val.p = NULL;
|
|
n->val.sz = 0;
|
|
}
|
|
|
|
if (NULL == string)
|
|
return;
|
|
|
|
/*
|
|
* One additional byte for the '\n' in multiline mode,
|
|
* and one for the terminating '\0'.
|
|
*/
|
|
newch = stringsz + (multiline ? 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);
|
|
}
|
|
|
|
/* 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++];
|
|
}
|
|
|
|
/* Append terminating bytes. */
|
|
if (multiline)
|
|
*c++ = '\n';
|
|
|
|
*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;
|
|
|
|
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);
|
|
|
|
return(NULL);
|
|
}
|
|
|
|
static void
|
|
roff_freestr(struct roffkv *r)
|
|
{
|
|
struct roffkv *n, *nn;
|
|
|
|
for (n = r; n; n = nn) {
|
|
free(n->key.p);
|
|
free(n->val.p);
|
|
nn = n->next;
|
|
free(n);
|
|
}
|
|
}
|
|
|
|
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(""));
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
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;
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
res[(int)ssz] = '\0';
|
|
return(res);
|
|
}
|