mandoc/roff.c - diff

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Up to [cvsweb.bsd.lv] / mandoc

Diff for /mandoc/roff.c between version 1.166 and 1.193

version 1.166, 2011/07/29 09:19:48

version 1.193, 2014/02/14 23:05:20

Line 1

/* $Id$ */

* Permission to use, copy, modify, and distribute this software for any

* purpose with or without fee is hereby granted, provided that the above

Line 21

#include <assert.h>

#include <ctype.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

Line 31

Line 32

/* Maximum number of nested if-else conditionals. */

#define RSTACK_MAX 128

/* Maximum number of string expansions per line, to break infinite loops. */

#define EXPAND_LIMIT 1000

enum rofft {

ROFF_ad,

ROFF_am,

ROFF_ami,

ROFF_am1,

ROFF_as,

ROFF_cc,

ROFF_de,

ROFF_dei,

ROFF_de1,

ROFF_ds,

ROFF_el,

ROFF_fam,

ROFF_hw,

ROFF_hy,

ROFF_ie,

ROFF_if,

Line 55 enum rofft {

Line 63 enum rofft {

ROFF_so,

ROFF_ta,

ROFF_tr,

ROFF_Dd,

ROFF_TH,

ROFF_TS,

ROFF_TE,

ROFF_T_,

Line 67 enum rofft {

Line 77 enum rofft {

};

enum roffrule {

ROFFRULE_ALLOW,

ROFFRULE_DENY,

ROFFRULE_DENY

ROFFRULE_ALLOW

};

* A single register entity. If "set" is zero, the value of the

* An incredibly-simple string buffer.

* register should be the default one, which is per-register.

* Registers are assumed to be unsigned ints for now.

struct reg {

int set; /* whether set or not */

unsigned int u; /* unsigned integer */

};

struct roffstr {

char *p;

char *p; /* nil-terminated buffer */

size_t sz;

size_t sz; /* saved strlen(p) */

};

* A key-value string pair with lengths.

* A key-value roffstr pair as part of a singly-linked list.

struct roffkv {

struct roffstr key;

Line 95 struct roffkv {

Line 98 struct roffkv {

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 {

enum mparset parsetype; /* requested parse type */

struct mparse *parse; /* parse point */

int quick; /* skip standard macro deletion */

struct roffnode *last; /* leaf of stack */

enum roffrule rstack[RSTACK_MAX]; /* stack of !`ie' rules */

char control; /* control character */

int rstackpos; /* position in rstack */

struct reg regs[REG__MAX];

struct roffreg *regtab; /* number registers */

struct roffkv *strtab; /* user-defined strings & macros */

struct roffkv *chrtab; /* user-defined characters */

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 */

Line 162 static enum rofferr roff_block(ROFF_ARGS);

Line 178 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_cblock(ROFF_ARGS);

static enum rofferr roff_cc(ROFF_ARGS);

static enum rofferr roff_ccond(ROFF_ARGS);

static enum rofferr roff_cond(ROFF_ARGS);

static enum rofferr roff_cond_text(ROFF_ARGS);

Line 169 static enum rofferr roff_cond_sub(ROFF_ARGS);

Line 186 static enum rofferr roff_cond_sub(ROFF_ARGS);

static enum rofferr roff_ds(ROFF_ARGS);

static enum roffrule roff_evalcond(const char *, int *);

static void roff_free1(struct roff *);

static void roff_freestr(struct roffkv **);

static void roff_freereg(struct roffreg *);

static void roff_freestr(struct roffkv *);

static char *roff_getname(struct roff *, char **, int, int);

static int roff_getnum(const char *, 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 char *name);

static const char *roff_getstrn(const struct roff *,

const char *, size_t);

static enum rofferr roff_it(ROFF_ARGS);

static enum rofferr roff_line_ignore(ROFF_ARGS);

static enum rofferr roff_nr(ROFF_ARGS);

static void roff_openeqn(struct roff *, const char *,

int, int, const char *);

static enum rofft roff_parse(struct roff *, const char *, int *);

static enum rofferr roff_parsetext(char *);

static enum rofferr roff_parsetext(char **, size_t *, int, int *);

static void roff_res(struct roff *,

static enum rofferr roff_res(struct roff *,

char **, size_t *, int, int);

static enum rofferr roff_rm(ROFF_ARGS);

static void roff_setstr(struct roff *,

Line 188 static void roff_setstrn(struct roffkv **, const cha

Line 212 static void roff_setstrn(struct roffkv **, const cha

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);

Line 208 static struct roffmac roffs[ROFF_MAX] = {

Line 234 static struct roffmac roffs[ROFF_MAX] = {

{ "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 },

{ "as", roff_ds, NULL, NULL, 0, NULL },

{ "cc", roff_cc, 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_ds, NULL, NULL, 0, NULL },

{ "el", roff_cond, roff_cond_text, roff_cond_sub, ROFFMAC_STRUCT, NULL },

{ "fam", roff_line_ignore, NULL, NULL, 0, NULL },

{ "hw", roff_line_ignore, NULL, NULL, 0, NULL },

{ "hy", 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 },

{ "it", roff_line_ignore, NULL, NULL, 0, NULL },

{ "it", roff_it, NULL, NULL, 0, NULL },

{ "ne", roff_line_ignore, NULL, NULL, 0, NULL },

{ "nh", roff_line_ignore, NULL, NULL, 0, NULL },

{ "nr", roff_nr, NULL, NULL, 0, NULL },

Line 227 static struct roffmac roffs[ROFF_MAX] = {

Line 257 static struct roffmac roffs[ROFF_MAX] = {

{ "so", roff_so, NULL, NULL, 0, NULL },

{ "ta", roff_line_ignore, NULL, NULL, 0, NULL },

{ "tr", roff_tr, NULL, NULL, 0, NULL },

{ "Dd", roff_Dd, NULL, NULL, 0, NULL },

{ "TH", roff_TH, NULL, NULL, 0, NULL },

{ "TS", roff_TS, NULL, NULL, 0, NULL },

{ "TE", roff_TE, NULL, NULL, 0, NULL },

{ "T&", roff_T_, NULL, NULL, 0, NULL },

Line 237 static struct roffmac roffs[ROFF_MAX] = {

Line 269 static struct roffmac roffs[ROFF_MAX] = {

{ NULL, roff_userdef, NULL, NULL, 0, NULL },

};

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",

"Ds", "Dt", "Dv", "Dx", "D1",

"Ec", "Ed", "Ef", "Ek", "El", "Em", "em",

"En", "Eo", "Eq", "Er", "Es", "Ev", "Ex",

"Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",

"Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp", "LP",

"Me", "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",

"Oc", "Oo", "Op", "Os", "Ot", "Ox",

"Pa", "Pc", "Pf", "Po", "Pp", "PP", "pp", "Pq",

"Qc", "Ql", "Qo", "Qq", "Or", "Rd", "Re", "Rs", "Rv",

"Sc", "Sf", "Sh", "SH", "Sm", "So", "Sq",

"Ss", "St", "Sx", "Sy",

"Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",

"%A", "%B", "%D", "%I", "%J", "%N", "%O",

"%P", "%Q", "%R", "%T", "%U", "%V",

NULL

};

const char *const __man_reserved[] = {

"AT", "B", "BI", "BR", "BT", "DE", "DS", "DT",

"EE", "EN", "EQ", "EX", "HF", "HP", "I", "IB", "IP", "IR",

"LP", "ME", "MT", "OP", "P", "PD", "PP", "PT",

"R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS", "SY",

"TE", "TH", "TP", "TQ", "TS", "T&", "UC", "UE", "UR", "YS",

NULL

};

/* Array of injected predefined strings. */

#define PREDEFS_MAX 38

static const struct predef predefs[PREDEFS_MAX] = {

Line 246 static const struct predef predefs[PREDEFS_MAX] = {

Line 309 static const struct predef predefs[PREDEFS_MAX] = {

/* 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 */

static void

roffhash_init(void)

{

Line 344 roffnode_push(struct roff *r, enum rofft tok, const ch

Line 410 roffnode_push(struct roff *r, enum rofft tok, const ch

static void

roff_free1(struct roff *r)

{

struct tbl_node *t;

struct tbl_node *tbl;

struct eqn_node *e;

int i;

while (NULL != (t = r->first_tbl)) {

while (NULL != (tbl = r->first_tbl)) {

r->first_tbl = t->next;

r->first_tbl = tbl->next;

tbl_free(t);

tbl_free(tbl);

}

r->first_tbl = r->last_tbl = r->tbl = NULL;

Line 364 roff_free1(struct roff *r)

Line 431 roff_free1(struct roff *r)

while (r->last)

roffnode_pop(r);

roff_freestr(&r->strtab);

roff_freestr(r->strtab);

roff_freestr(&r->chrtab);

roff_freestr(r->xmbtab);

}

r->strtab = r->xmbtab = NULL;

roff_freereg(r->regtab);

r->regtab = 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)

{

int i;

roff_free1(r);

r->control = 0;

memset(&r->regs, 0, sizeof(struct reg) * REG__MAX);

for (i = 0; i < PREDEFS_MAX; i++)

roff_setstr(r, predefs[i].name, predefs[i].str, 0);

}

Line 393 roff_free(struct roff *r)

Line 467 roff_free(struct roff *r)

struct roff *

roff_alloc(struct mparse *parse)

roff_alloc(enum mparset type, struct mparse *parse, int quick)

{

struct roff *r;

int i;

r = mandoc_calloc(1, sizeof(struct roff));

r->parsetype = type;

r->parse = parse;

r->quick = quick;

r->rstackpos = -1;

roffhash_init();

for (i = 0; i < PREDEFS_MAX; i++)

roff_setstr(r, predefs[i].name, predefs[i].str, 0);

return(r);

}

* Pre-filter each and every line for reserved words (one beginning with

* In the current line, expand user-defined strings ("\*")

* `\*', e.g., `\*(ab'). These must be handled before the actual line

* and references to number registers ("\n").

* is processed.

* Also check the syntax of other escape sequences.

* This also checks the syntax of regular escapes.

static void

static enum rofferr

roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)

{

enum mandoc_esc esc;

char ubuf[12]; /* buffer to print the number */

const 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 */

int i, maxl;

char *nbuf; /* new buffer to copy bufp to */

size_t nsz;

size_t nsz; /* size of the new buffer */

char *n;

size_t maxl; /* expected length of the escape name */

size_t naml; /* actual length of the escape name */

int expand_count; /* to avoid infinite loops */

expand_count = 0;

again:

cp = *bufp + pos;

while (NULL != (cp = strchr(cp, '\\'))) {

stesc = cp++;

* The second character must be an asterisk.

* The second character must be an asterisk or an n.

* If it isn't, skip it anyway: It is escaped,

* so it can't start another escape sequence.

if ('\0' == *cp)

return;

return(ROFF_CONT);

if ('*' != *cp) {

switch (*cp) {

res = cp;

case ('*'):

esc = mandoc_escape(&cp, NULL, NULL);

res = NULL;

if (ESCAPE_ERROR != esc)

break;

case ('n'):

res = ubuf;

break;

default:

if (ESCAPE_ERROR != mandoc_escape(&cp, NULL, NULL))

continue;

cp = res;

mandoc_msg

(MANDOCERR_BADESCAPE, r->parse,

ln, (int)(stesc - *bufp), NULL);

return;

return(ROFF_CONT);

}

cp++;

* The third character decides the length

* of the name of the string.

* of the name of the string or register.

* Save a pointer to the name.

switch (*cp) {

case ('\0'):

return;

return(ROFF_CONT);

case ('('):

cp++;

maxl = 2;

Line 481 again:

Line 560 again:

/* Advance to the end of the name. */

for (i = 0; 0 == maxl || i < maxl; i++, cp++) {

for (naml = 0; 0 == maxl || naml < maxl; naml++, cp++) {

if ('\0' == *cp) {

mandoc_msg

(MANDOCERR_BADESCAPE,

r->parse, ln,

(int)(stesc - *bufp), NULL);

return;

return(ROFF_CONT);

}

if (0 == maxl && ']' == *cp)

break;

Line 498 again:

Line 577 again:

* undefined, resume searching for escapes.

res = roff_getstrn(r, stnam, (size_t)i);

if (NULL == res)

res = roff_getstrn(r, stnam, naml);

else

snprintf(ubuf, sizeof(ubuf), "%d",

roff_getregn(r, stnam, naml));

if (NULL == res) {

mandoc_msg

Line 512 again:

Line 595 again:

pos = stesc - *bufp;

nsz = *szp + strlen(res) + 1;

n = mandoc_malloc(nsz);

nbuf = mandoc_malloc(nsz);

strlcpy(n, *bufp, (size_t)(stesc - *bufp + 1));

strlcpy(nbuf, *bufp, (size_t)(stesc - *bufp + 1));

strlcat(n, res, nsz);

strlcat(nbuf, res, nsz);

strlcat(n, cp + (maxl ? 0 : 1), nsz);

strlcat(nbuf, cp + (maxl ? 0 : 1), nsz);

free(*bufp);

*bufp = n;

*bufp = nbuf;

*szp = nsz;

goto again;

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.

* Process text streams:

* Convert all breakable hyphens into ASCII_HYPH.

* Decrement and spring input line trap.

static enum rofferr

roff_parsetext(char *p)

roff_parsetext(char **bufp, size_t *szp, int pos, int *offs)

{

char l, r;

size_t sz;

const char *start;

char *p;

int isz;

enum mandoc_esc esc;

start = p;

start = p = *bufp + pos;

while ('\0' != *p) {

sz = strcspn(p, "-\\");

Line 549 roff_parsetext(char *p)

Line 642 roff_parsetext(char *p)

if ('\\' == *p) {

/* Skip over escapes. */

p++;

esc = mandoc_escape

esc = mandoc_escape((const char **)&p, NULL, NULL);

((const char **)&p, NULL, NULL);

if (ESCAPE_ERROR == esc)

break;

continue;

Line 559 roff_parsetext(char *p)

Line 651 roff_parsetext(char *p)

continue;

}

l = *(p - 1);

if (isalpha((unsigned char)p[-1]) &&

r = *(p + 1);

isalpha((unsigned char)p[1]))

if ('\\' != l &&

'\t' != r && '\t' != l &&

' ' != r && ' ' != l &&

'-' != r && '-' != l &&

! isdigit((unsigned char)l) &&

! isdigit((unsigned char)r))

*p = ASCII_HYPH;

p++;

}

/* Spring the input line trap. */

if (1 == roffit_lines) {

isz = asprintf(&p, "%s\n.%s", *bufp, roffit_macro);

if (-1 == isz) {

perror(NULL);

exit((int)MANDOCLEVEL_SYSERR);

}

free(*bufp);

*bufp = p;

*szp = isz + 1;

*offs = 0;

free(roffit_macro);

roffit_lines = 0;

return(ROFF_REPARSE);

} else if (1 < roffit_lines)

--roffit_lines;

return(ROFF_CONT);

}

Line 587 roff_parseln(struct roff *r, int ln, char **bufp,

Line 689 roff_parseln(struct roff *r, int ln, char **bufp,

* words to fill in.

roff_res(r, bufp, szp, ln, pos);

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);

ctl = roff_getcontrol(r, *bufp, &pos);

* First, if a scope is open and we're not a macro, pass the

Line 608 roff_parseln(struct roff *r, int ln, char **bufp,

Line 713 roff_parseln(struct roff *r, int ln, char **bufp,

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->eqn)

return(eqn_read(&r->eqn, ln, *bufp, ppos, offs));

if ( ! ctl) {

if (r->tbl)

return(tbl_read(r->tbl, ln, *bufp, pos));

return(roff_parsetext(*bufp + pos));

return(roff_parsetext(bufp, szp, pos, offs));

} 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,

Line 757 roffnode_cleanscope(struct roff *r)

Line 857 roffnode_cleanscope(struct roff *r)

{

while (r->last) {

if (--r->last->endspan < 0)

if (--r->last->endspan != 0)

break;

roffnode_pop(r);

}

Line 841 roff_block(ROFF_ARGS)

Line 941 roff_block(ROFF_ARGS)

* 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.

* appended from roff_block_text() in multiline mode.

if (ROFF_de == tok)

Line 931 roff_block_sub(ROFF_ARGS)

Line 1031 roff_block_sub(ROFF_ARGS)

if (ROFF_cblock != t) {

if (ROFF_de == tok)

roff_setstr(r, r->last->name, *bufp + ppos, 1);

roff_setstr(r, r->last->name, *bufp + ppos, 2);

return(ROFF_IGN);

}

Line 947 roff_block_text(ROFF_ARGS)

Line 1047 roff_block_text(ROFF_ARGS)

{

if (ROFF_de == tok)

roff_setstr(r, r->last->name, *bufp + pos, 1);

roff_setstr(r, r->last->name, *bufp + pos, 2);

return(ROFF_IGN);

}

Line 963 roff_cond_sub(ROFF_ARGS)

Line 1063 roff_cond_sub(ROFF_ARGS)

rr = r->last->rule;

roffnode_cleanscope(r);

t = roff_parse(r, *bufp, &pos);

* If the macro is unknown, first check if it contains a closing

* Fully handle known macros when they are structurally

* delimiter `\}'. If it does, close out our scope and return

* required or when the conditional evaluated to true.

* the currently-scoped rule (ignore or continue). Else, drop

* into the currently-scoped rule.

if (ROFF_MAX == (t = roff_parse(r, *bufp, &pos))) {

if ((ROFF_MAX != t) &&

ep = &(*bufp)[pos];

(ROFF_ccond == t || ROFFRULE_ALLOW == rr ||

for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {

ROFFMAC_STRUCT & roffs[t].flags)) {

ep++;

assert(roffs[t].proc);

if ('}' != *ep)

return((*roffs[t].proc)(r, t, bufp, szp,

continue;

ln, ppos, pos, offs));

}

/* Always check for the closing delimiter `\}'. */

* 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 = &(*bufp)[pos];

*--ep = '\0';

while (NULL != (ep = strchr(ep, '\\'))) {

*szp -= 2;

if ('}' != *(++ep))

} else

continue;

*(ep - 1) = *ep = ' ';

roff_ccond(r, ROFF_ccond, bufp, szp,

ln, pos, pos + 2, offs);

* If we're at the end of line, then just chop

break;

* off the \} and resize the buffer.

}

* If we aren't, then convert it to spaces.

return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);

}

if ('\0' == *(ep + 1)) {

* A denied conditional must evaluate its children if and only

*--ep = '\0';

* if they're either structurally required (such as loops and

*szp -= 2;

* conditionals) or a closing macro.

} else

*(ep - 1) = *ep = ' ';

if (ROFFRULE_DENY == rr)

roff_ccond(r, ROFF_ccond, bufp, szp,

if ( ! (ROFFMAC_STRUCT & roffs[t].flags))

ln, pos, pos + 2, offs);

if (ROFF_ccond != t)

break;

return(ROFF_IGN);

}

return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);

assert(roffs[t].proc);

return((*roffs[t].proc)(r, t, bufp, szp,

ln, ppos, pos, offs));

}

/* ARGSUSED */

Line 1038 roff_cond_text(ROFF_ARGS)

Line 1126 roff_cond_text(ROFF_ARGS)

return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);

}

static int

roff_getnum(const char *v, int *pos, int *res)

{

int p, n;

p = *pos;

n = v[p] == '-';

if (n)

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;

*pos = p;

return 1;

}

static int

roff_getop(const char *v, int *pos, char *res)

{

int e;

*res = v[*pos];

e = v[*pos + 1] == '=';

switch (*res) {

case '=':

break;

case '>':

if (e)

*res = 'g';

break;

case '<':

if (e)

*res = 'l';

break;

default:

return(0);

}

*pos += 1 + e;

return(*res);

}

static enum roffrule

roff_evalcond(const char *v, int *pos)

{

int not, lh, rh;

char op;

switch (v[*pos]) {

case ('n'):

Line 1053 roff_evalcond(const char *v, int *pos)

Line 1193 roff_evalcond(const char *v, int *pos)

case ('t'):

(*pos)++;

return(ROFFRULE_DENY);

case ('!'):

(*pos)++;

not = 1;

break;

default:

not = 0;

break;

}

while (v[*pos] && ' ' != v[*pos])

if (!roff_getnum(v, pos, &lh))

(*pos)++;

return ROFFRULE_DENY;

return(ROFFRULE_DENY);

if (!roff_getop(v, pos, &op)) {

if (lh < 0)

lh = 0;

goto out;

}

if (!roff_getnum(v, pos, &rh))

return ROFFRULE_DENY;

switch (op) {

case 'g':

lh = lh >= rh;

break;

case 'l':

lh = lh <= rh;

break;

case '=':

lh = lh == rh;

break;

case '>':

lh = lh > rh;

break;

case '<':

lh = lh < rh;

break;

default:

return ROFFRULE_DENY;

}

out:

if (not)

lh = !lh;

return lh ? ROFFRULE_ALLOW : ROFFRULE_DENY;

}

/* ARGSUSED */

Line 1067 static enum rofferr

Line 1241 static enum rofferr

roff_line_ignore(ROFF_ARGS)

{

if (ROFF_it == tok)

mandoc_msg(MANDOCERR_REQUEST, r->parse, ln, ppos, "it");

return(ROFF_IGN);

}

Line 1077 roff_line_ignore(ROFF_ARGS)

Line 1248 roff_line_ignore(ROFF_ARGS)

static enum rofferr

roff_cond(ROFF_ARGS)

{

int sv;

enum roffrule rule;

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

Line 1088 roff_cond(ROFF_ARGS)

Line 1259 roff_cond(ROFF_ARGS)

* If we're not an `el', however, then evaluate the conditional.

rule = ROFF_el == tok ?

r->last->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.

Line 1135 roff_cond(ROFF_ARGS)

Line 1286 roff_cond(ROFF_ARGS)

r->last->rule = ROFFRULE_DENY;

* Determine scope. If we're invoked with "\{" trailing the

* Determine scope.

* conditional, then we're in a multiline scope. Else our scope

* If there is nothing on the line after the conditional,

* expires on the next line.

* not even whitespace, use next-line scope.

r->last->endspan = 1;

if ('\0' == (*bufp)[pos]) {

r->last->endspan = 2;

goto out;

}

while (' ' == (*bufp)[pos])

pos++;

/* An opening brace requests multiline scope. */

if ('\\' == (*bufp)[pos] && '{' == (*bufp)[pos + 1]) {

r->last->endspan = -1;

pos += 2;

goto out;

}

* If there are no arguments on the line, the next-line scope is

* Anything else following the conditional causes

* assumed.

* single-line scope. Warn if the scope contains

* nothing but trailing whitespace.

if ('\0' == (*bufp)[pos])

return(ROFF_IGN);

mandoc_msg(MANDOCERR_NOARGS, r->parse, ln, ppos, NULL);

/* Otherwise re-run the roff parser after recalculating. */

r->last->endspan = 1;

out:

*offs = pos;

return(ROFF_RERUN);

}

Line 1188 roff_ds(ROFF_ARGS)

Line 1350 roff_ds(ROFF_ARGS)

string++;

/* The rest is the value. */

roff_setstr(r, name, string, 0);

roff_setstr(r, name, string, ROFF_as == tok);

return(ROFF_IGN);

}

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 char *name)

{

switch (*name) {

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_regisset(const struct roff *r, enum regs reg)

roff_getreg(const struct roff *r, const char *name)

{

struct roffreg *reg;

int val;

return(r->regs[(int)reg].set);

if ('.' == name[0] && '\0' != name[1] && '\0' == name[2]) {

val = roff_getregro(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);

}

unsigned int

static int

roff_regget(const struct roff *r, enum regs reg)

roff_getregn(const struct roff *r, const char *name, size_t len)

{

struct roffreg *reg;

int val;

return(r->regs[(int)reg].u);

if ('.' == name[0] && 2 == len) {

val = roff_getregro(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);

}

void

static void

roff_regunset(struct roff *r, enum regs reg)

roff_freereg(struct roffreg *reg)

{

struct roffreg *old_reg;

r->regs[(int)reg].set = 0;

while (NULL != reg) {

free(reg->key.p);

old_reg = reg;

reg = reg->next;

free(old_reg);

}

/* ARGSUSED */

Line 1219 roff_nr(ROFF_ARGS)

Line 1469 roff_nr(ROFF_ARGS)

{

const char *key;

char *val;

size_t sz;

int iv;

char sign;

val = *bufp + pos;

key = roff_getname(r, &val, ln, pos);

if (0 == strcmp(key, "nS")) {

sign = *val;

r->regs[(int)REG_nS].set = 1;

if ('+' == sign || '-' == sign)

if ((iv = mandoc_strntoi(val, strlen(val), 10)) >= 0)

val++;

r->regs[(int)REG_nS].u = (unsigned)iv;

else

r->regs[(int)REG_nS].u = 0u;

}

sz = strspn(val, "0123456789");

iv = sz ? mandoc_strntoi(val, sz, 10) : 0;

roff_setreg(r, key, iv, sign);

return(ROFF_IGN);

}

Line 1253 roff_rm(ROFF_ARGS)

Line 1506 roff_rm(ROFF_ARGS)

/* ARGSUSED */

static enum rofferr

roff_it(ROFF_ARGS)

{

char *cp;

size_t len;

int iv;

/* Parse the number of lines. */

cp = *bufp + pos;

len = strcspn(cp, " \t");

cp[len] = '\0';

if ((iv = mandoc_strntoi(cp, len, 10)) <= 0) {

mandoc_msg(MANDOCERR_NUMERIC, r->parse,

ln, ppos, *bufp + 1);

return(ROFF_IGN);

}

cp += len + 1;

/* Arm the input line trap. */

roffit_lines = iv;

roffit_macro = mandoc_strdup(cp);

return(ROFF_IGN);

}

/* ARGSUSED */

static enum rofferr

roff_Dd(ROFF_ARGS)

{

const char *const *cp;

if (0 == r->quick && MPARSE_MDOC != r->parsetype)

for (cp = __mdoc_reserved; *cp; cp++)

roff_setstr(r, *cp, NULL, 0);

return(ROFF_CONT);

}

/* ARGSUSED */

static enum rofferr

roff_TH(ROFF_ARGS)

{

const char *const *cp;

if (0 == r->quick && MPARSE_MDOC != r->parsetype)

for (cp = __man_reserved; *cp; cp++)

roff_setstr(r, *cp, NULL, 0);

return(ROFF_CONT);

}

/* ARGSUSED */

static enum rofferr

roff_TE(ROFF_ARGS)

{

Line 1331 roff_EN(ROFF_ARGS)

Line 1635 roff_EN(ROFF_ARGS)

static enum rofferr

roff_TS(ROFF_ARGS)

{

struct tbl_node *t;

struct tbl_node *tbl;

if (r->tbl) {

mandoc_msg(MANDOCERR_SCOPEBROKEN, r->parse, ln, ppos, NULL);

tbl_end(&r->tbl);

}

t = tbl_alloc(ppos, ln, r->parse);

tbl = tbl_alloc(ppos, ln, r->parse);

if (r->last_tbl)

r->last_tbl->next = t;

r->last_tbl->next = tbl;

else

r->first_tbl = r->last_tbl = t;

r->first_tbl = r->last_tbl = tbl;

r->tbl = r->last_tbl = t;

r->tbl = r->last_tbl = tbl;

return(ROFF_IGN);

}

/* ARGSUSED */

static enum rofferr

roff_cc(ROFF_ARGS)

{

const char *p;

p = *bufp + pos;

if ('\0' == *p || '.' == (r->control = *p++))

r->control = 0;

if ('\0' != *p)

mandoc_msg(MANDOCERR_ARGCOUNT, r->parse, ln, ppos, NULL);

return(ROFF_IGN);

}

/* ARGSUSED */

static enum rofferr

roff_tr(ROFF_ARGS)

{

const char *p, *first, *second;

Line 1396 roff_tr(ROFF_ARGS)

Line 1717 roff_tr(ROFF_ARGS)

p--;

}

roff_setstrn(&r->chrtab, first, fsz, second, ssz, 0);

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);

Line 1437 roff_userdef(ROFF_ARGS)

Line 1770 roff_userdef(ROFF_ARGS)

* Collect pointers to macro argument strings

* and null-terminate them.

* and NUL-terminate them.

cp = *bufp + pos;

for (i = 0; i < 9; i++)

Line 1517 roff_getname(struct roff *r, char **cpp, int ln, int p

Line 1850 roff_getname(struct roff *r, char **cpp, int ln, int p

* 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).

* 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 multiline)

int append)

{

roff_setstrn(&r->strtab, name, strlen(name), string,

string ? strlen(string) : 0, multiline);

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 multiline)

const char *string, size_t stringsz, int append)

{

struct roffkv *n;

char *c;

Line 1554 roff_setstrn(struct roffkv **r, const char *name, size

Line 1888 roff_setstrn(struct roffkv **r, const char *name, size

n->val.sz = 0;

n->next = *r;

*r = n;

} else if (0 == multiline) {

} else if (0 == append) {

/* In multiline mode, append; else replace. */

free(n->val.p);

n->val.p = NULL;

n->val.sz = 0;

Line 1568 roff_setstrn(struct roffkv **r, const char *name, size

Line 1901 roff_setstrn(struct roffkv **r, const char *name, size

* One additional byte for the '\n' in multiline mode,

* and one for the terminating '\0'.

newch = stringsz + (multiline ? 2u : 1u);

newch = stringsz + (1 < append ? 2u : 1u);

if (NULL == n->val.p) {

n->val.p = mandoc_malloc(newch);

Line 1595 roff_setstrn(struct roffkv **r, const char *name, size

Line 1928 roff_setstrn(struct roffkv **r, const char *name, size

}

/* Append terminating bytes. */

if (multiline)

if (1 < append)

*c++ = '\n';

*c = '\0';

Line 1606 static const char *

Line 1939 static const char *

roff_getstrn(const struct roff *r, const char *name, size_t len)

{

const struct roffkv *n;

int i;

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)

roff_freestr(struct roffkv *r)

{

struct roffkv *n, *nn;

for (n = *r; n; n = nn) {

for (n = r; n; n = nn) {

free(n->key.p);

free(n->val.p);

nn = n->next;

free(n);

}

*r = NULL;

}

const struct tbl_span *

Line 1644 roff_eqn(const struct roff *r)

Line 1981 roff_eqn(const struct roff *r)

return(r->last_eqn ? &r->last_eqn->eqn : NULL);

}

char

roff_eqndelim(const struct roff *r)

{

return('\0');

}

* Duplicate an input string, making the appropriate character

* conversations (as stipulated by `tr') along the way.

Line 1665 roff_strdup(const struct roff *r, const char *p)

Line 1995 roff_strdup(const struct roff *r, const char *p)

size_t ssz, sz;

enum mandoc_esc esc;

if (NULL == r->chrtab)

if (NULL == r->xmbtab && NULL == r->xtab)

return(mandoc_strdup(p));

else if ('\0' == *p)

return(mandoc_strdup(""));

Line 1682 roff_strdup(const struct roff *r, const char *p)

Line 2012 roff_strdup(const struct roff *r, const char *p)

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->chrtab; cp; cp = cp->next)

for (cp = r->xmbtab; cp; cp = cp->next)

if (0 == strncmp(p, cp->key.p, cp->key.sz))

break;

Line 1701 roff_strdup(const struct roff *r, const char *p)

Line 2044 roff_strdup(const struct roff *r, const char *p)

continue;

}

if ('\\' == *p) {

* 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;

break;

continue;

}

/* Just append the charater. */

* We bail out on bad escapes.

res = mandoc_realloc(res, ssz + 2);

* No need to warn: we already did so when

res[ssz++] = *p++;

* 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);

}

* 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++;

*ppos = pos;

return(1);

}

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