-/* $Id: roff.c,v 1.193 2014/02/14 23:05:20 schwarze Exp $ */
+/* $Id: roff.c,v 1.212 2014/06/29 22:14:10 schwarze Exp $ */
/*
* Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
#include <string.h>
#include "mandoc.h"
+#include "mandoc_aux.h"
#include "libroff.h"
#include "libmandoc.h"
ROFF_am1,
ROFF_as,
ROFF_cc,
+ ROFF_ce,
ROFF_de,
ROFF_dei,
ROFF_de1,
ROFF_ns,
ROFF_ps,
ROFF_rm,
+ ROFF_rr,
ROFF_so,
ROFF_ta,
ROFF_tr,
ROFF_EQ,
ROFF_EN,
ROFF_cblock,
- ROFF_ccond,
ROFF_USERDEF,
ROFF_MAX
};
-enum roffrule {
- ROFFRULE_DENY,
- ROFFRULE_ALLOW
-};
-
/*
* An incredibly-simple string buffer.
*/
};
struct roff {
- enum mparset parsetype; /* requested parse type */
struct mparse *parse; /* parse point */
- int quick; /* skip standard macro deletion */
+ 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 roffreg *regtab; /* number registers */
char *name; /* node name, e.g. macro name */
char *end; /* end-rules: custom token */
int endspan; /* end-rules: next-line or infty */
- enum roffrule rule; /* current evaluation rule */
+ int rule; /* current evaluation rule */
};
#define ROFF_ARGS struct roff *r, /* parse ctx */ \
enum rofft tok, /* tok of macro */ \
- char **bufp, /* input buffer */ \
+ char **bufp, /* input buffer */ \
size_t *szp, /* size of input buffer */ \
int ln, /* parse line */ \
int ppos, /* original pos in buffer */ \
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_evalnum(const char *, int *, int *, int);
+static int roff_evalpar(const char *, int *, int *);
+static int roff_evalstrcond(const char *, int *);
static void roff_free1(struct roff *);
static void roff_freereg(struct roffreg *);
static void roff_freestr(struct roffkv *);
-static char *roff_getname(struct roff *, char **, int, int);
+static size_t 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 *,
+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);
int, int, const char *);
static enum rofft roff_parse(struct roff *, const char *, int *);
static enum rofferr roff_parsetext(char **, size_t *, int, int *);
-static enum rofferr roff_res(struct roff *,
+static enum rofferr roff_res(struct roff *,
char **, size_t *, int, int);
static enum rofferr roff_rm(ROFF_ARGS);
+static enum rofferr roff_rr(ROFF_ARGS);
static void roff_setstr(struct roff *,
const char *, const char *, int);
-static void roff_setstrn(struct roffkv **, const char *,
+static void roff_setstrn(struct roffkv **, const char *,
size_t, const char *, size_t, int);
static enum rofferr roff_so(ROFF_ARGS);
static enum rofferr roff_tr(ROFF_ARGS);
{ "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 },
{ "ns", roff_line_ignore, NULL, NULL, 0, NULL },
{ "ps", roff_line_ignore, NULL, NULL, 0, NULL },
{ "rm", roff_rm, NULL, NULL, 0, NULL },
+ { "rr", roff_rr, NULL, NULL, 0, NULL },
{ "so", roff_so, NULL, NULL, 0, NULL },
{ "ta", roff_line_ignore, NULL, NULL, 0, NULL },
{ "tr", roff_tr, NULL, NULL, 0, NULL },
{ "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",
- "Ec", "Ed", "Ef", "Ek", "El", "Em", "em",
- "En", "Eo", "Eq", "Er", "Es", "Ev", "Ex",
+ "Dt", "Dv", "Dx", "D1",
+ "Ec", "Ed", "Ef", "Ek", "El", "Em",
+ "En", "Eo", "Er", "Es", "Ev", "Ex",
"Fa", "Fc", "Fd", "Fl", "Fn", "Fo", "Fr", "Ft", "Fx",
- "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp", "LP",
- "Me", "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
+ "Hf", "Ic", "In", "It", "Lb", "Li", "Lk", "Lp",
+ "Ms", "Mt", "Nd", "Nm", "No", "Ns", "Nx",
"Oc", "Oo", "Op", "Os", "Ot", "Ox",
- "Pa", "Pc", "Pf", "Po", "Pp", "PP", "pp", "Pq",
- "Qc", "Ql", "Qo", "Qq", "Or", "Rd", "Re", "Rs", "Rv",
- "Sc", "Sf", "Sh", "SH", "Sm", "So", "Sq",
+ "Pa", "Pc", "Pf", "Po", "Pp", "Pq",
+ "Qc", "Ql", "Qo", "Qq", "Re", "Rs", "Rv",
+ "Sc", "Sh", "Sm", "So", "Sq",
"Ss", "St", "Sx", "Sy",
"Ta", "Tn", "Ud", "Ux", "Va", "Vt", "Xc", "Xo", "Xr",
- "%A", "%B", "%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",
- "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",
+ "AT", "B", "BI", "BR", "DT",
+ "EE", "EN", "EQ", "EX", "HP", "I", "IB", "IP", "IR",
+ "LP", "OP", "P", "PD", "PP",
+ "R", "RB", "RE", "RI", "RS", "SB", "SH", "SM", "SS",
+ "TE", "TH", "TP", "TS", "T&", "UC", "UE", "UR",
NULL
};
static int roffit_lines; /* number of lines to delay */
static char *roffit_macro; /* nil-terminated macro line */
+
static void
roffhash_init(void)
{
return(ROFF_MAX);
}
-
/*
* Pop the current node off of the stack of roff instructions currently
* pending.
struct roffnode *p;
assert(r->last);
- p = r->last;
+ p = r->last;
r->last = r->last->parent;
free(p->name);
free(p);
}
-
/*
* Push a roff node onto the instruction stack. This must later be
* removed with roffnode_pop().
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;
}
-
static void
roff_free1(struct roff *r)
{
r->control = 0;
}
-
void
roff_free(struct roff *r)
{
free(r);
}
-
struct roff *
-roff_alloc(enum mparset type, struct mparse *parse, int quick)
+roff_alloc(struct mparse *parse, int options)
{
struct roff *r;
r = mandoc_calloc(1, sizeof(struct roff));
- r->parsetype = type;
r->parse = parse;
- r->quick = quick;
+ r->options = options;
r->rstackpos = -1;
-
+
roffhash_init();
return(r);
}
/*
- * In the current line, expand user-defined strings ("\*")
- * and references to number registers ("\n").
- * Also check the syntax of other escape sequences.
+ * In the current line, expand escape sequences that tend to get
+ * used in numerical expressions and conditional requests.
+ * Also check the syntax of the remaining escape sequences.
*/
static enum rofferr
roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)
{
- char ubuf[12]; /* buffer to print the number */
- const char *stesc; /* start of an escape sequence ('\\') */
+ char ubuf[24]; /* buffer to print the number */
+ const char *start; /* start of the string to process */
+ char *stesc; /* start of an escape sequence ('\\') */
const char *stnam; /* start of the name, after "[(*" */
const char *cp; /* end of the name, e.g. before ']' */
const char *res; /* the string to be substituted */
char *nbuf; /* new buffer to copy bufp to */
- size_t nsz; /* size of the new buffer */
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 */
+ int npos; /* position in numeric expression */
+ int irc; /* return code from roff_evalnum() */
+ char term; /* character terminating the escape */
expand_count = 0;
+ start = *bufp + pos;
+ stesc = strchr(start, '\0') - 1;
+ while (stesc-- > start) {
-again:
- cp = *bufp + pos;
- while (NULL != (cp = strchr(cp, '\\'))) {
- stesc = cp++;
+ /* Search backwards for the next backslash. */
- /*
- * 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 ('\\' != *stesc)
+ continue;
+
+ /* If it is escaped, skip it. */
- if ('\0' == *cp)
- return(ROFF_CONT);
+ for (cp = stesc - 1; cp >= start; cp--)
+ if ('\\' != *cp)
+ break;
+
+ if (0 == (stesc - cp) % 2) {
+ stesc = (char *)cp;
+ continue;
+ }
+ /* Decide whether to expand or to check only. */
+
+ term = '\0';
+ cp = stesc + 1;
switch (*cp) {
- case ('*'):
+ case '*':
res = NULL;
break;
- case ('n'):
+ case 'B':
+ /* FALLTHROUGH */
+ case 'w':
+ term = cp[1];
+ /* FALLTHROUGH */
+ case 'n':
res = ubuf;
break;
default:
- if (ESCAPE_ERROR != mandoc_escape(&cp, NULL, NULL))
- continue;
- mandoc_msg
- (MANDOCERR_BADESCAPE, r->parse,
- ln, (int)(stesc - *bufp), NULL);
- return(ROFF_CONT);
+ if (ESCAPE_ERROR == mandoc_escape(&cp, NULL, NULL))
+ mandoc_msg(MANDOCERR_BADESCAPE, r->parse,
+ ln, (int)(stesc - *bufp), NULL);
+ continue;
}
- cp++;
+ if (EXPAND_LIMIT < ++expand_count) {
+ mandoc_msg(MANDOCERR_ROFFLOOP, r->parse,
+ ln, (int)(stesc - *bufp), NULL);
+ return(ROFF_IGN);
+ }
/*
* The third character decides the length
* Save a pointer to the name.
*/
- switch (*cp) {
- case ('\0'):
- return(ROFF_CONT);
- case ('('):
- cp++;
- maxl = 2;
- break;
- case ('['):
- cp++;
+ if ('\0' == term) {
+ switch (*++cp) {
+ case '\0':
+ maxl = 0;
+ break;
+ case '(':
+ cp++;
+ maxl = 2;
+ break;
+ case '[':
+ cp++;
+ term = ']';
+ maxl = 0;
+ break;
+ default:
+ maxl = 1;
+ break;
+ }
+ } else {
+ cp += 2;
maxl = 0;
- break;
- default:
- maxl = 1;
- break;
}
stnam = 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(ROFF_CONT);
+ mandoc_msg(MANDOCERR_BADESCAPE, r->parse,
+ ln, (int)(stesc - *bufp), NULL);
+ break;
}
- if (0 == maxl && ']' == *cp)
+ if (0 == maxl && *cp == term) {
+ cp++;
break;
+ }
}
/*
* undefined, resume searching for escapes.
*/
- if (NULL == res)
+ switch (stesc[1]) {
+ case '*':
res = roff_getstrn(r, stnam, naml);
- else
- snprintf(ubuf, sizeof(ubuf), "%d",
+ break;
+ case 'B':
+ npos = 0;
+ irc = roff_evalnum(stnam, &npos, NULL, 0);
+ ubuf[0] = irc && stnam + npos + 1 == cp
+ ? '1' : '0';
+ ubuf[1] = '\0';
+ break;
+ case 'n':
+ (void)snprintf(ubuf, sizeof(ubuf), "%d",
roff_getregn(r, stnam, naml));
+ break;
+ case 'w':
+ (void)snprintf(ubuf, sizeof(ubuf), "%d",
+ 24 * (int)naml);
+ break;
+ }
if (NULL == res) {
- mandoc_msg
- (MANDOCERR_BADESCAPE, r->parse,
- ln, (int)(stesc - *bufp), NULL);
+ 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;
- nbuf = mandoc_malloc(nsz);
+ *stesc = '\0';
+ *szp = mandoc_asprintf(&nbuf, "%s%s%s",
+ *bufp, res, cp) + 1;
- strlcpy(nbuf, *bufp, (size_t)(stesc - *bufp + 1));
- strlcat(nbuf, res, nsz);
- strlcat(nbuf, cp + (maxl ? 0 : 1), nsz);
+ /* Prepare for the next replacement. */
+ start = nbuf + pos;
+ stesc = nbuf + (stesc - *bufp) + strlen(res);
free(*bufp);
-
*bufp = nbuf;
- *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);
}
/* 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);
- }
+ isz = mandoc_asprintf(&p, "%s\n.%s", *bufp, roffit_macro);
free(*bufp);
*bufp = p;
*szp = isz + 1;
}
enum rofferr
-roff_parseln(struct roff *r, int ln, char **bufp,
+roff_parseln(struct roff *r, int ln, char **bufp,
size_t *szp, int pos, int *offs)
{
enum rofft t;
if (r->last && ! ctl) {
t = r->last->tok;
assert(roffs[t].text);
- e = (*roffs[t].text)
- (r, t, bufp, szp, ln, pos, pos, offs);
+ 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->last) {
t = r->last->tok;
assert(roffs[t].sub);
- return((*roffs[t].sub)
- (r, t, bufp, szp,
- ln, ppos, pos, offs));
+ return((*roffs[t].sub)(r, t, bufp, szp,
+ ln, ppos, pos, offs));
}
/*
return(ROFF_CONT);
assert(roffs[t].proc);
- return((*roffs[t].proc)
- (r, t, bufp, szp,
- ln, ppos, pos, offs));
+ 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);
+ 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);
+ 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);
+ mandoc_msg(MANDOCERR_SCOPEEXIT, r->parse,
+ r->tbl->line, r->tbl->pos, NULL);
tbl_end(&r->tbl);
}
}
size_t maclen;
enum rofft t;
- if ('\0' == buf[*pos] || '"' == buf[*pos] ||
- '\t' == buf[*pos] || ' ' == buf[*pos])
+ 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.
- */
+ /* We stop the macro parse at an escape, tab, space, or nil. */
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);
return(t);
}
-/* ARGSUSED */
static enum rofferr
roff_cblock(ROFF_ARGS)
{
}
switch (r->last->tok) {
- case (ROFF_am):
+ case ROFF_am:
/* FALLTHROUGH */
- case (ROFF_ami):
+ case ROFF_ami:
/* FALLTHROUGH */
- case (ROFF_am1):
+ case ROFF_am1:
/* FALLTHROUGH */
- case (ROFF_de):
+ case ROFF_de:
/* ROFF_de1 is remapped to ROFF_de in roff_block(). */
/* FALLTHROUGH */
- case (ROFF_dei):
+ case ROFF_dei:
/* FALLTHROUGH */
- case (ROFF_ig):
+ case ROFF_ig:
break;
default:
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
}
-
static void
roffnode_cleanscope(struct roff *r)
{
}
}
-
-/* ARGSUSED */
-static enum rofferr
-roff_ccond(ROFF_ARGS)
+static void
+roff_ccond(struct roff *r, int ln, int ppos)
{
if (NULL == r->last) {
mandoc_msg(MANDOCERR_NOSCOPE, r->parse, ln, ppos, NULL);
- return(ROFF_IGN);
+ return;
}
switch (r->last->tok) {
- case (ROFF_el):
+ case ROFF_el:
/* FALLTHROUGH */
- case (ROFF_ie):
+ case ROFF_ie:
/* FALLTHROUGH */
- case (ROFF_if):
+ case ROFF_if:
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;
}
-
-/* ARGSUSED */
static enum rofferr
roff_block(ROFF_ARGS)
{
return(ROFF_IGN);
}
-
-/* ARGSUSED */
static enum rofferr
roff_block_sub(ROFF_ARGS)
{
if ((*bufp)[i] != r->last->end[j])
break;
- if ('\0' == r->last->end[j] &&
- ('\0' == (*bufp)[i] ||
- ' ' == (*bufp)[i] ||
- '\t' == (*bufp)[i])) {
+ if ('\0' == r->last->end[j] &&
+ ('\0' == (*bufp)[i] ||
+ ' ' == (*bufp)[i] ||
+ '\t' == (*bufp)[i])) {
roffnode_pop(r);
roffnode_cleanscope(r);
}
assert(roffs[t].proc);
- return((*roffs[t].proc)(r, t, bufp, szp,
- ln, ppos, pos, offs));
+ return((*roffs[t].proc)(r, t, bufp, szp, ln, ppos, pos, offs));
}
-
-/* ARGSUSED */
static enum rofferr
roff_block_text(ROFF_ARGS)
{
return(ROFF_IGN);
}
-
-/* ARGSUSED */
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);
*/
if ((ROFF_MAX != t) &&
- (ROFF_ccond == t || ROFFRULE_ALLOW == rr ||
- ROFFMAC_STRUCT & roffs[t].flags)) {
+ (rr || ROFFMAC_STRUCT & roffs[t].flags)) {
assert(roffs[t].proc);
return((*roffs[t].proc)(r, t, bufp, szp,
- ln, ppos, pos, offs));
+ ln, ppos, pos, offs));
}
- /* Always check for the closing delimiter `\}'. */
-
- ep = &(*bufp)[pos];
- while (NULL != (ep = strchr(ep, '\\'))) {
- if ('}' != *(++ep))
- continue;
+ /*
+ * If `\}' occurs on a macro line without a preceding macro,
+ * drop the line completely.
+ */
- /*
- * If we're at the end of line, then just chop
- * off the \} and resize the buffer.
- * If we aren't, then convert it to spaces.
- */
+ ep = *bufp + pos;
+ if ('\\' == ep[0] && '}' == ep[1])
+ rr = 0;
- if ('\0' == *(ep + 1)) {
- *--ep = '\0';
- *szp -= 2;
- } else
- *(ep - 1) = *ep = ' ';
+ /* Always check for the closing delimiter `\}'. */
- roff_ccond(r, ROFF_ccond, bufp, szp,
- ln, pos, pos + 2, offs);
- break;
+ while (NULL != (ep = strchr(ep, '\\'))) {
+ if ('}' == *(++ep)) {
+ *ep = '&';
+ roff_ccond(r, ln, ep - *bufp - 1);
+ }
+ ++ep;
}
- return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
+ return(rr ? ROFF_CONT : ROFF_IGN);
}
-/* ARGSUSED */
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];
- for ( ; NULL != (ep = strchr(ep, '\\')); ep++) {
- ep++;
- if ('}' != *ep)
- continue;
- *ep = '&';
- roff_ccond(r, ROFF_ccond, bufp, szp,
- ln, pos, pos + 2, offs);
+ ep = *bufp + pos;
+ while (NULL != (ep = strchr(ep, '\\'))) {
+ if ('}' == *(++ep)) {
+ *ep = '&';
+ roff_ccond(r, ln, ep - *bufp - 1);
+ }
+ ++ep;
}
- return(ROFFRULE_DENY == rr ? ROFF_IGN : ROFF_CONT);
+ return(rr ? ROFF_CONT : ROFF_IGN);
}
+/*
+ * Parse a single signed integer number. Stop at the first non-digit.
+ * If there is at least one digit, return success and advance the
+ * parse point, else return failure and let the parse point unchanged.
+ * Ignore overflows, treat them just like the C language.
+ */
static int
roff_getnum(const char *v, int *pos, int *res)
{
- int p, n;
+ int myres, n, p;
+
+ if (NULL == res)
+ res = &myres;
p = *pos;
n = v[p] == '-';
p++;
for (*res = 0; isdigit((unsigned char)v[p]); p++)
- *res += 10 * *res + v[p] - '0';
+ *res = 10 * *res + v[p] - '0';
if (p == *pos + n)
return 0;
return 1;
}
+/*
+ * Evaluate a string comparison condition.
+ * The first character is the delimiter.
+ * Succeed if the string up to its second occurrence
+ * matches the string up to its third occurence.
+ * Advance the cursor after the third occurrence
+ * or lacking that, to the end of the line.
+ */
static int
-roff_getop(const char *v, int *pos, char *res)
+roff_evalstrcond(const char *v, int *pos)
{
- int e;
+ const char *s1, *s2, *s3;
+ int match;
- *res = v[*pos];
- e = v[*pos + 1] == '=';
+ match = 0;
+ s1 = v + *pos; /* initial delimiter */
+ s2 = s1 + 1; /* for scanning the first string */
+ s3 = strchr(s2, *s1); /* for scanning the second string */
- switch (*res) {
- case '=':
- break;
- case '>':
- if (e)
- *res = 'g';
- break;
- case '<':
- if (e)
- *res = 'l';
- break;
- default:
- return(0);
- }
+ if (NULL == s3) /* found no middle delimiter */
+ goto out;
- *pos += 1 + e;
+ while ('\0' != *++s3) {
+ if (*s2 != *s3) { /* mismatch */
+ s3 = strchr(s3, *s1);
+ break;
+ }
+ if (*s3 == *s1) { /* found the final delimiter */
+ match = 1;
+ break;
+ }
+ s2++;
+ }
- return(*res);
+out:
+ if (NULL == s3)
+ s3 = strchr(s2, '\0');
+ else
+ s3++;
+ *pos = s3 - v;
+ return(match);
}
-static enum roffrule
+/*
+ * Evaluate an optionally negated single character, numerical,
+ * or string condition.
+ */
+static int
roff_evalcond(const char *v, int *pos)
{
- int not, lh, rh;
- char op;
+ int wanttrue, number;
+
+ if ('!' == v[*pos]) {
+ wanttrue = 0;
+ (*pos)++;
+ } else
+ wanttrue = 1;
switch (v[*pos]) {
- case ('n'):
+ case 'n':
+ /* FALLTHROUGH */
+ case 'o':
(*pos)++;
- return(ROFFRULE_ALLOW);
- case ('e'):
+ return(wanttrue);
+ case 'c':
/* FALLTHROUGH */
- case ('o'):
+ case 'd':
/* FALLTHROUGH */
- case ('t'):
- (*pos)++;
- return(ROFFRULE_DENY);
- case ('!'):
+ case 'e':
+ /* FALLTHROUGH */
+ case 'r':
+ /* FALLTHROUGH */
+ case 't':
(*pos)++;
- not = 1;
- break;
+ return(!wanttrue);
default:
- not = 0;
break;
}
- if (!roff_getnum(v, pos, &lh))
- 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;
+ if (roff_evalnum(v, pos, &number, 0))
+ return((number > 0) == wanttrue);
+ else
+ return(roff_evalstrcond(v, pos) == wanttrue);
}
-/* ARGSUSED */
static enum rofferr
roff_line_ignore(ROFF_ARGS)
{
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_cond(ROFF_ARGS)
{
roffnode_push(r, tok, NULL, ln, ppos);
- /*
+ /*
* An `.el' has no conditional body: it will consume the value
* of the current rstack entry set in prior `ie' calls or
- * defaults to DENY.
+ * defaults to DENY.
*
* If we're not an `el', however, then evaluate the conditional.
*/
r->last->rule = ROFF_el == tok ?
- (r->rstackpos < 0 ?
- ROFFRULE_DENY : r->rstack[r->rstackpos--]) :
- roff_evalcond(*bufp, &pos);
+ (r->rstackpos < 0 ? 0 : r->rstack[r->rstackpos--]) :
+ roff_evalcond(*bufp, &pos);
/*
* An if-else will put the NEGATION of the current evaluated
if (ROFF_ie == tok) {
if (r->rstackpos == RSTACK_MAX - 1) {
- mandoc_msg(MANDOCERR_MEM,
- r->parse, ln, ppos, NULL);
+ 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;
+ r->rstack[++r->rstackpos] = !r->last->rule;
}
/* 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;
+ if (r->last->parent && !r->last->parent->rule)
+ r->last->rule = 0;
/*
* Determine scope.
r->last->endspan = -1;
pos += 2;
goto out;
- }
+ }
/*
* Anything else following the conditional causes
return(ROFF_RERUN);
}
-
-/* ARGSUSED */
static enum rofferr
roff_ds(ROFF_ARGS)
{
- char *name, *string;
+ char *string;
+ const char *name;
+ size_t namesz;
/*
- * 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.
+ * The first word is the name of the string.
+ * If it is empty or terminated by an escape sequence,
+ * abort the `ds' request without defining anything.
*/
- string = *bufp + pos;
- name = roff_getname(r, &string, ln, pos);
+ name = string = *bufp + pos;
if ('\0' == *name)
return(ROFF_IGN);
- /* Read past initial double-quote. */
+ namesz = roff_getname(r, &string, ln, pos);
+ if ('\\' == name[namesz])
+ return(ROFF_IGN);
+
+ /* Read past the initial double-quote, if any. */
if ('"' == *string)
string++;
/* The rest is the value. */
- roff_setstr(r, name, string, ROFF_as == tok);
+ roff_setstrn(&r->strtab, name, namesz, string, strlen(string),
+ ROFF_as == tok);
return(ROFF_IGN);
}
+/*
+ * Parse a single operator, one or two characters long.
+ * If the operator is recognized, return success and advance the
+ * parse point, else return failure and let the parse point unchanged.
+ */
+static int
+roff_getop(const char *v, int *pos, char *res)
+{
+
+ *res = v[*pos];
+
+ switch (*res) {
+ case '+':
+ /* FALLTHROUGH */
+ case '-':
+ /* FALLTHROUGH */
+ case '*':
+ /* FALLTHROUGH */
+ case '/':
+ /* FALLTHROUGH */
+ case '%':
+ /* FALLTHROUGH */
+ case '&':
+ /* FALLTHROUGH */
+ case ':':
+ break;
+ case '<':
+ switch (v[*pos + 1]) {
+ case '=':
+ *res = 'l';
+ (*pos)++;
+ break;
+ case '>':
+ *res = '!';
+ (*pos)++;
+ break;
+ case '?':
+ *res = 'i';
+ (*pos)++;
+ break;
+ default:
+ break;
+ }
+ break;
+ case '>':
+ switch (v[*pos + 1]) {
+ case '=':
+ *res = 'g';
+ (*pos)++;
+ break;
+ case '?':
+ *res = 'a';
+ (*pos)++;
+ break;
+ default:
+ break;
+ }
+ break;
+ case '=':
+ if ('=' == v[*pos + 1])
+ (*pos)++;
+ break;
+ default:
+ return(0);
+ }
+ (*pos)++;
+
+ return(*res);
+}
+
+/*
+ * Evaluate either a parenthesized numeric expression
+ * or a single signed integer number.
+ */
+static int
+roff_evalpar(const char *v, int *pos, int *res)
+{
+
+ if ('(' != v[*pos])
+ return(roff_getnum(v, pos, res));
+
+ (*pos)++;
+ if ( ! roff_evalnum(v, pos, res, 1))
+ return(0);
+
+ /*
+ * Omission of the closing parenthesis
+ * is an error in validation mode,
+ * but ignored in evaluation mode.
+ */
+
+ if (')' == v[*pos])
+ (*pos)++;
+ else if (NULL == res)
+ return(0);
+
+ return(1);
+}
+
+/*
+ * Evaluate a complete numeric expression.
+ * Proceed left to right, there is no concept of precedence.
+ */
+static int
+roff_evalnum(const char *v, int *pos, int *res, int skipwhite)
+{
+ int mypos, operand2;
+ char operator;
+
+ if (NULL == pos) {
+ mypos = 0;
+ pos = &mypos;
+ }
+
+ if (skipwhite)
+ while (isspace((unsigned char)v[*pos]))
+ (*pos)++;
+
+ if ( ! roff_evalpar(v, pos, res))
+ return(0);
+
+ while (1) {
+ if (skipwhite)
+ while (isspace((unsigned char)v[*pos]))
+ (*pos)++;
+
+ if ( ! roff_getop(v, pos, &operator))
+ break;
+
+ if (skipwhite)
+ while (isspace((unsigned char)v[*pos]))
+ (*pos)++;
+
+ if ( ! roff_evalpar(v, pos, &operand2))
+ return(0);
+
+ if (skipwhite)
+ while (isspace((unsigned char)v[*pos]))
+ (*pos)++;
+
+ if (NULL == res)
+ continue;
+
+ switch (operator) {
+ case '+':
+ *res += operand2;
+ break;
+ case '-':
+ *res -= operand2;
+ break;
+ case '*':
+ *res *= operand2;
+ break;
+ case '/':
+ *res /= operand2;
+ break;
+ case '%':
+ *res %= operand2;
+ break;
+ case '<':
+ *res = *res < operand2;
+ break;
+ case '>':
+ *res = *res > operand2;
+ break;
+ case 'l':
+ *res = *res <= operand2;
+ break;
+ case 'g':
+ *res = *res >= operand2;
+ break;
+ case '=':
+ *res = *res == operand2;
+ break;
+ case '!':
+ *res = *res != operand2;
+ break;
+ case '&':
+ *res = *res && operand2;
+ break;
+ case ':':
+ *res = *res || operand2;
+ break;
+ case 'i':
+ if (operand2 < *res)
+ *res = operand2;
+ break;
+ case 'a':
+ if (operand2 > *res)
+ *res = operand2;
+ break;
+ default:
+ abort();
+ }
+ }
+ return(1);
+}
+
void
roff_setreg(struct roff *r, const char *name, int val, char sign)
{
{
switch (*name) {
- case ('A'): /* ASCII approximation mode is always off. */
+ case 'A': /* ASCII approximation mode is always off. */
return(0);
- case ('g'): /* Groff compatibility mode is always on. */
+ case 'g': /* Groff compatibility mode is always on. */
return(1);
- case ('H'): /* Fixed horizontal resolution. */
+ case 'H': /* Fixed horizontal resolution. */
return (24);
- case ('j'): /* Always adjust left margin only. */
+ case 'j': /* Always adjust left margin only. */
return(0);
- case ('T'): /* Some output device is always defined. */
+ case 'T': /* Some output device is always defined. */
return(1);
- case ('V'): /* Fixed vertical resolution. */
+ case 'V': /* Fixed vertical resolution. */
return (40);
default:
return (-1);
}
}
-/* ARGSUSED */
static enum rofferr
roff_nr(ROFF_ARGS)
{
- const char *key;
- char *val;
- size_t sz;
+ char *key, *val;
+ size_t keysz;
int iv;
char sign;
- val = *bufp + pos;
- key = roff_getname(r, &val, ln, pos);
+ key = val = *bufp + pos;
+ if ('\0' == *key)
+ return(ROFF_IGN);
+
+ keysz = roff_getname(r, &val, ln, pos);
+ if ('\\' == key[keysz])
+ return(ROFF_IGN);
+ key[keysz] = '\0';
sign = *val;
if ('+' == sign || '-' == sign)
val++;
- sz = strspn(val, "0123456789");
- iv = sz ? mandoc_strntoi(val, sz, 10) : 0;
+ if (roff_evalnum(val, NULL, &iv, 0))
+ roff_setreg(r, key, iv, sign);
+
+ return(ROFF_IGN);
+}
+
+static enum rofferr
+roff_rr(ROFF_ARGS)
+{
+ struct roffreg *reg, **prev;
+ char *name, *cp;
+ size_t namesz;
- roff_setreg(r, key, iv, sign);
+ name = cp = *bufp + pos;
+ if ('\0' == *name)
+ return(ROFF_IGN);
+ namesz = roff_getname(r, &cp, ln, pos);
+ name[namesz] = '\0';
+ prev = &r->regtab;
+ while (1) {
+ reg = *prev;
+ if (NULL == reg || !strcmp(name, reg->key.p))
+ break;
+ prev = ®->next;
+ }
+ if (NULL != reg) {
+ *prev = reg->next;
+ free(reg->key.p);
+ free(reg);
+ }
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_rm(ROFF_ARGS)
{
const char *name;
char *cp;
+ size_t namesz;
cp = *bufp + pos;
while ('\0' != *cp) {
- name = roff_getname(r, &cp, ln, (int)(cp - *bufp));
- if ('\0' != *name)
- roff_setstr(r, name, NULL, 0);
+ name = cp;
+ namesz = roff_getname(r, &cp, ln, (int)(cp - *bufp));
+ roff_setstrn(&r->strtab, name, namesz, NULL, 0, 0);
+ if ('\\' == name[namesz])
+ break;
}
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_it(ROFF_ARGS)
{
cp[len] = '\0';
if ((iv = mandoc_strntoi(cp, len, 10)) <= 0) {
mandoc_msg(MANDOCERR_NUMERIC, r->parse,
- ln, ppos, *bufp + 1);
+ ln, ppos, *bufp + 1);
return(ROFF_IGN);
}
cp += len + 1;
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_Dd(ROFF_ARGS)
{
const char *const *cp;
- if (0 == r->quick && MPARSE_MDOC != r->parsetype)
+ if (0 == ((MPARSE_MDOC | MPARSE_QUICK) & r->options))
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)
+ if (0 == (MPARSE_QUICK & r->options))
for (cp = __man_reserved; *cp; cp++)
roff_setstr(r, *cp, NULL, 0);
return(ROFF_CONT);
}
-/* ARGSUSED */
static enum rofferr
roff_TE(ROFF_ARGS)
{
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_T_(ROFF_ARGS)
{
#endif
static void
-roff_openeqn(struct roff *r, const char *name, int line,
+roff_openeqn(struct roff *r, const char *name, int line,
int offs, const char *buf)
{
struct eqn_node *e;
}
}
-/* ARGSUSED */
static enum rofferr
roff_EQ(ROFF_ARGS)
{
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_EN(ROFF_ARGS)
{
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_TS(ROFF_ARGS)
{
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_cc(ROFF_ARGS)
{
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_tr(ROFF_ARGS)
{
if ('\\' == *first) {
esc = mandoc_escape(&p, NULL, NULL);
if (ESCAPE_ERROR == esc) {
- mandoc_msg
- (MANDOCERR_BADESCAPE, r->parse,
- ln, (int)(p - *bufp), NULL);
+ mandoc_msg(MANDOCERR_BADESCAPE,
+ r->parse, ln,
+ (int)(p - *bufp), NULL);
return(ROFF_IGN);
}
fsz = (size_t)(p - first);
if ('\\' == *second) {
esc = mandoc_escape(&p, NULL, NULL);
if (ESCAPE_ERROR == esc) {
- mandoc_msg
- (MANDOCERR_BADESCAPE, r->parse,
- ln, (int)(p - *bufp), NULL);
+ 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);
+ 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);
+ roff_setstrn(&r->xmbtab, first, fsz,
+ second, ssz, 0);
continue;
}
if (NULL == r->xtab)
- r->xtab = mandoc_calloc
- (128, sizeof(struct roffstr));
+ r->xtab = mandoc_calloc(128,
+ sizeof(struct roffstr));
free(r->xtab[(int)*first].p);
r->xtab[(int)*first].p = mandoc_strndup(second, ssz);
return(ROFF_IGN);
}
-/* ARGSUSED */
static enum rofferr
roff_so(ROFF_ARGS)
{
char *name;
- mandoc_msg(MANDOCERR_SO, r->parse, ln, ppos, NULL);
+ name = *bufp + pos;
+ mandoc_vmsg(MANDOCERR_SO, r->parse, ln, ppos, ".so %s", name);
/*
* Handle `so'. Be EXTREMELY careful, as we shouldn't be
* or using absolute paths.
*/
- name = *bufp + pos;
if ('/' == *name || strstr(name, "../") || strstr(name, "/..")) {
- mandoc_msg(MANDOCERR_SOPATH, r->parse, ln, pos, NULL);
+ mandoc_vmsg(MANDOCERR_SO_PATH, r->parse, ln, ppos,
+ ".so %s", name);
return(ROFF_ERR);
}
return(ROFF_SO);
}
-/* ARGSUSED */
static enum rofferr
roff_userdef(ROFF_ARGS)
{
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 = '\0';
+ *szp = mandoc_asprintf(&n2, "%s%s%s",
+ n1, arg[i], cp + 3) + 1;
cp = n2 + (cp - n1);
free(n1);
n1 = n2;
ROFF_REPARSE : ROFF_APPEND);
}
-static char *
+static size_t
roff_getname(struct roff *r, char **cpp, int ln, int pos)
{
char *name, *cp;
+ size_t namesz;
name = *cpp;
if ('\0' == *name)
- return(name);
+ return(0);
- /* Read until end of name. */
- for (cp = name; '\0' != *cp && ' ' != *cp; cp++) {
+ /* Read until end of name and terminate it with NUL. */
+ for (cp = name; 1; cp++) {
+ if ('\0' == *cp || ' ' == *cp) {
+ namesz = cp - name;
+ break;
+ }
if ('\\' != *cp)
continue;
cp++;
if ('\\' == *cp)
continue;
+ namesz = cp - name - 1;
mandoc_msg(MANDOCERR_NAMESC, r->parse, ln, pos, NULL);
- *cp = '\0';
- name = cp;
+ mandoc_escape((const char **)&cp, NULL, NULL);
+ break;
}
- /* Nil-terminate name. */
- if ('\0' != *cp)
- *(cp++) = '\0';
-
/* Read past spaces. */
while (' ' == *cp)
cp++;
*cpp = cp;
- return(name);
+ return(namesz);
}
/*
{
roff_setstrn(&r->strtab, name, strlen(name), string,
- string ? strlen(string) : 0, append);
+ string ? strlen(string) : 0, append);
}
static void
/* Search for an existing string with the same name. */
n = *r;
- while (n && strcmp(name, n->key.p))
+ while (n && (namesz != n->key.sz ||
+ strncmp(n->key.p, name, namesz)))
n = n->next;
if (NULL == 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])
+ 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++)
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);
}
* Append the match to the array and move
* forward by its keysize.
*/
- res = mandoc_realloc
- (res, ssz + cp->val.sz + 1);
+ 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;
memcpy(res + ssz, pp, sz);
break;
}
- /*
- * We bail out on bad escapes.
+ /*
+ * We bail out on bad escapes.
* No need to warn: we already did so when
* roff_res() was called.
*/
}
/*
- * Find out whether a line is a macro line or not.
+ * 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
git.ckatri.com / mandoc.git / blobdiff