mandoc/roff.c - diff

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Up to [cvsweb.bsd.lv] / mandoc

Diff for /mandoc/roff.c between version 1.176 and 1.200

version 1.176, 2013/05/31 22:08:09

version 1.200, 2014/03/20 02:57:28

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 39 enum rofft {

Line 40 enum rofft {

ROFF_am,

ROFF_ami,

ROFF_am1,

ROFF_as,

ROFF_cc,

ROFF_ce,

ROFF_de,

ROFF_dei,

ROFF_de1,

ROFF_ds,

ROFF_el,

ROFF_fam,

ROFF_hw,

ROFF_hy,

ROFF_ie,

ROFF_if,

Line 67 enum rofft {

Line 72 enum rofft {

ROFF_EQ,

ROFF_EN,

ROFF_cblock,

ROFF_ccond,

ROFF_USERDEF,

ROFF_MAX

};

enum roffrule {

ROFFRULE_ALLOW,

ROFFRULE_DENY

};

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

* 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 */

};

* An incredibly-simple string buffer.

struct roffstr {

Line 104 struct roffkv {

Line 93 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 options; /* parse options */

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

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

int 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 *xmbtab; /* multi-byte trans table (`tr') */

struct roffstr *xtab; /* single-byte trans table (`tr') */

Line 132 struct roffnode {

Line 130 struct roffnode {

char *name; /* node name, e.g. macro name */

char *end; /* end-rules: custom token */

int endspan; /* end-rules: next-line or infty */

enum roffrule rule; /* current evaluation rule */

int rule; /* current evaluation rule */

};

#define ROFF_ARGS struct roff *r, /* parse ctx */ \

Line 175 static enum rofferr roff_block_text(ROFF_ARGS);

Line 173 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 void roff_ccond(struct roff *, int, int);

static enum rofferr roff_cond(ROFF_ARGS);

static enum rofferr roff_cond_text(ROFF_ARGS);

static enum rofferr roff_cond_sub(ROFF_ARGS);

static enum rofferr roff_ds(ROFF_ARGS);

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

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

static int roff_evalstrcond(const char *, int *);

static void roff_free1(struct roff *);

static void roff_freereg(struct roffreg *);

static void roff_freestr(struct roffkv *);

static 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 enum rofferr roff_res(struct roff *,

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

static enum rofferr roff_rm(ROFF_ARGS);

Line 223 static struct roffmac roffs[ROFF_MAX] = {

Line 229 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 },

{ "ce", roff_line_ignore, 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 251 static struct roffmac roffs[ROFF_MAX] = {

Line 261 static struct roffmac roffs[ROFF_MAX] = {

{ "EQ", roff_EQ, NULL, NULL, 0, NULL },

{ "EN", roff_EN, NULL, NULL, 0, NULL },

{ ".", roff_cblock, NULL, NULL, 0, NULL },

{ "\\}", roff_ccond, NULL, NULL, 0, NULL },

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

};

/* not currently implemented: Ds em Eq LP Me PP pp Or Rd Sf SH */

const char *const __mdoc_reserved[] = {

"Ac", "Ad", "An", "Ao", "Ap", "Aq", "Ar", "At",

"Bc", "Bd", "Bf", "Bk", "Bl", "Bo", "Bq",

"Brc", "Bro", "Brq", "Bsx", "Bt", "Bx",

"Cd", "Cm", "Db", "Dc", "Dd", "Dl", "Do", "Dq",

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

"Sc", "Sh", "Sm", "So", "Sq",

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

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

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

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

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

NULL

};

/* not currently implemented: BT DE DS ME MT PT SY TQ YS */

const char *const __man_reserved[] = {

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

"AT", "B", "BI", "BR", "DT",

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

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

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

"LP", "OP", "P", "PD", "PP",

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

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

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

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

NULL

};

Line 295 static const struct predef predefs[PREDEFS_MAX] = {

Line 306 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 384 roffnode_push(struct roff *r, enum rofft tok, const ch

Line 398 roffnode_push(struct roff *r, enum rofft tok, const ch

p->parent = r->last;

p->line = line;

p->col = col;

p->rule = p->parent ? p->parent->rule : ROFFRULE_DENY;

p->rule = p->parent ? p->parent->rule : 0;

r->last = p;

}

Line 419 roff_free1(struct roff *r)

Line 433 roff_free1(struct roff *r)

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);

Line 430 roff_free1(struct roff *r)

Line 448 roff_free1(struct roff *r)

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 452 roff_free(struct roff *r)

Line 464 roff_free(struct roff *r)

struct roff *

roff_alloc(enum mparset type, struct mparse *parse)

roff_alloc(struct mparse *parse, int options)

{

struct roff *r;

int i;

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

r->parsetype = type;

r->parse = parse;

r->options = options;

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 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, expand_count;

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;

Line 496 again:

Line 505 again:

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.

Line 504 again:

Line 513 again:

if ('\0' == *cp)

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);

Line 520 again:

Line 533 again:

* 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.

Line 543 again:

Line 556 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,

Line 560 again:

Line 573 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 574 again:

Line 591 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;

if (EXPAND_LIMIT >= ++expand_count)

Line 596 again:

Line 613 again:

}

* 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)

{

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 617 roff_parsetext(char *p)

Line 638 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 633 roff_parsetext(char *p)

Line 653 roff_parsetext(char *p)

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 673 roff_parseln(struct roff *r, int ln, char **bufp,

Line 709 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 753 roff_parse(struct roff *r, const char *buf, int *pos)

Line 784 roff_parse(struct roff *r, const char *buf, int *pos)

'\t' == buf[*pos] || ' ' == buf[*pos])

return(ROFF_MAX);

/* We stop the macro parse at an escape, tab, space, or nil. */

* 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;

maclen = strcspn(mac, " \\\t\0");

t = (r->current_string = roff_getstrn(r, mac, maclen))

? ROFF_USERDEF : roffhash_find(mac, maclen);

Line 829 roffnode_cleanscope(struct roff *r)

Line 856 roffnode_cleanscope(struct roff *r)

}

/* ARGSUSED */

static void

static enum rofferr

roff_ccond(struct roff *r, int ln, int ppos)

roff_ccond(ROFF_ARGS)

{

if (NULL == r->last) {

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

return(ROFF_IGN);

return;

}

switch (r->last->tok) {

Line 848 roff_ccond(ROFF_ARGS)

Line 874 roff_ccond(ROFF_ARGS)

break;

default:

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

return(ROFF_IGN);

return;

}

if (r->last->endspan > -1) {

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

return(ROFF_IGN);

return;

}

if ((*bufp)[pos])

mandoc_msg(MANDOCERR_ARGSLOST, r->parse, ln, pos, NULL);

roffnode_pop(r);

roffnode_cleanscope(r);

return(ROFF_IGN);

return;

}

Line 906 roff_block(ROFF_ARGS)

Line 929 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 996 roff_block_sub(ROFF_ARGS)

Line 1019 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 1012 roff_block_text(ROFF_ARGS)

Line 1035 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 1023 static enum rofferr

Line 1046 static enum rofferr

roff_cond_sub(ROFF_ARGS)

{

enum rofft t;

enum roffrule rr;

char *ep;

int rr;

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];

(rr || ROFFMAC_STRUCT & roffs[t].flags)) {

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

assert(roffs[t].proc);

ep++;

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

if ('}' != *ep)

ln, ppos, pos, offs));

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 `\}' occurs on a macro line without a preceding macro,

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

* drop the line completely.

* conditionals) or a closing macro.

if (ROFFRULE_DENY == rr)

ep = *bufp + pos;

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

if ('\\' == ep[0] && '}' == ep[1])

if (ROFF_ccond != t)

rr = 0;

return(ROFF_IGN);

assert(roffs[t].proc);

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

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

ln, ppos, pos, offs));

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

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

*ep = '&';

roff_ccond(r, ln, ep - *bufp - 1);

}

++ep;

}

return(rr ? ROFF_CONT : ROFF_IGN);

}

/* ARGSUSED */

Line 1086 static enum rofferr

Line 1091 static enum rofferr

roff_cond_text(ROFF_ARGS)

{

char *ep;

enum roffrule rr;

int rr;

rr = r->last->rule;

roffnode_cleanscope(r);

ep = &(*bufp)[pos];

ep = *bufp + pos;

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

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

ep++;

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

if ('}' != *ep)

*ep = '&';

continue;

roff_ccond(r, ln, ep - *bufp - 1);

*ep = '&';

}

roff_ccond(r, ROFF_ccond, bufp, szp,

++ep;

ln, pos, pos + 2, offs);

}

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

return(rr ? ROFF_CONT : ROFF_IGN);

}

static enum roffrule

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);

}

* Evaluate a string comparison condition.

* The first character is the delimiter.

* Succeed if the string up to its second occurrence

* matches the string up to its third occurence.

* Advance the cursor after the third occurrence

* or lacking that, to the end of the line.

static int

roff_evalstrcond(const char *v, int *pos)

{

const char *s1, *s2, *s3;

int match;

match = 0;

s1 = v + *pos; /* initial delimiter */

s2 = s1 + 1; /* for scanning the first string */

s3 = strchr(s2, *s1); /* for scanning the second string */

if (NULL == s3) /* found no middle delimiter */

goto out;

while ('\0' != *++s3) {

if (*s2 != *s3) { /* mismatch */

s3 = strchr(s3, *s1);

break;

}

if (*s3 == *s1) { /* found the final delimiter */

match = 1;

break;

}

s2++;

}

out:

if (NULL == s3)

s3 = strchr(s2, '\0');

else

s3++;

*pos = s3 - v;

return(match);

}

static int

roff_evalcond(const char *v, int *pos)

{

int wanttrue, lh, rh;

char op;

if ('!' == v[*pos]) {

wanttrue = 0;

(*pos)++;

} else

wanttrue = 1;

switch (v[*pos]) {

case ('n'):

/* FALLTHROUGH */

case ('o'):

(*pos)++;

return(ROFFRULE_ALLOW);

return(wanttrue);

case ('c'):

/* FALLTHROUGH */

case ('d'):

/* FALLTHROUGH */

case ('e'):

/* FALLTHROUGH */

case ('o'):

case ('r'):

/* FALLTHROUGH */

case ('t'):

(*pos)++;

return(ROFFRULE_DENY);

return(!wanttrue);

default:

break;

}

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

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

(*pos)++;

return(roff_evalstrcond(v, pos) == wanttrue);

return(ROFFRULE_DENY);

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

return((lh > 0) == wanttrue);

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

return(0);

switch (op) {

case 'g':

return((lh >= rh) == wanttrue);

case 'l':

return((lh <= rh) == wanttrue);

case '=':

return((lh == rh) == wanttrue);

case '>':

return((lh > rh) == wanttrue);

case '<':

return((lh < rh) == wanttrue);

default:

return(0);

}

/* ARGSUSED */

Line 1132 static enum rofferr

Line 1261 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 1154 roff_cond(ROFF_ARGS)

Line 1280 roff_cond(ROFF_ARGS)

r->last->rule = ROFF_el == tok ?

(r->rstackpos < 0 ?

(r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :

ROFFRULE_DENY : r->rstack[r->rstackpos--]) :

roff_evalcond(*bufp, &pos);

Line 1169 roff_cond(ROFF_ARGS)

Line 1294 roff_cond(ROFF_ARGS)

r->parse, ln, ppos, NULL);

return(ROFF_ERR);

}

r->rstack[++r->rstackpos] =

r->rstack[++r->rstackpos] = !r->last->rule;

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)

if (r->last->parent && !r->last->parent->rule)

r->last->rule = ROFFRULE_DENY;

r->last->rule = 0;

* Determine scope.

Line 1244 roff_ds(ROFF_ARGS)

Line 1367 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 1275 roff_nr(ROFF_ARGS)

Line 1486 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 1309 roff_rm(ROFF_ARGS)

Line 1523 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 (MPARSE_MDOC != r->parsetype)

if (0 == ((MPARSE_MDOC | MPARSE_QUICK) & r->options))

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

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

Line 1326 roff_TH(ROFF_ARGS)

Line 1565 roff_TH(ROFF_ARGS)

{

const char *const *cp;

if (MPARSE_MDOC != r->parsetype)

if (0 == (MPARSE_QUICK & r->options))

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

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

Line 1548 roff_userdef(ROFF_ARGS)

Line 1787 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 1628 roff_getname(struct roff *r, char **cpp, int ln, int p

Line 1867 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 1665 roff_setstrn(struct roffkv **r, const char *name, size

Line 1905 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 1679 roff_setstrn(struct roffkv **r, const char *name, size

Line 1918 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 1706 roff_setstrn(struct roffkv **r, const char *name, size

Line 1945 roff_setstrn(struct roffkv **r, const char *name, size

}

/* Append terminating bytes. */

if (multiline)

if (1 < append)

*c++ = '\n';

*c = '\0';

Line 1717 static const char *

Line 1956 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);

}

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