/*
* Parse a roff node's type from the input buffer. This must be in the
* form of ".foo xxx" in the usual way.
*/
static enum rofft
roff_parse(struct roff *r, const char *buf, int *pos)
{
const char *mac;
size_t maclen;
enum rofft t;
if ('\0' == buf[*pos] || '"' == buf[*pos] ||
'\t' == buf[*pos] || ' ' == buf[*pos])
return(ROFF_MAX);
/*
* We stop the macro parse at an escape, tab, space, or nil.
* However, `\}' is also a valid macro, so make sure we don't
* clobber it by seeing the `\' as the end of token.
*/
mac = buf + *pos;
maclen = strcspn(mac + 1, " \\\t\0") + 1;
t = (r->current_string = roff_getstrn(r, mac, maclen))
? ROFF_USERDEF : roffhash_find(mac, maclen);
*pos += (int)maclen;
while (buf[*pos] && ' ' == buf[*pos])
(*pos)++;
return(t);
}
static int
man_pmacro(struct roff_man *man, int ln, char *buf, int offs)
{
struct roff_node *n;
const char *cp;
size_t sz;
enum roff_tok tok;
int ppos;
int bline;
/* Determine the line macro. */
ppos = offs;
tok = TOKEN_NONE;
for (sz = 0; sz < 4 && strchr(" \t\\", buf[offs]) == NULL; sz++)
offs++;
if (sz > 0 && sz < 4)
tok = roffhash_find(man->manmac, buf + ppos, sz);
if (tok == TOKEN_NONE) {
mandoc_msg(MANDOCERR_MACRO, man->parse,
ln, ppos, buf + ppos - 1);
return 1;
}
/* Skip a leading escape sequence or tab. */
switch (buf[offs]) {
case '\\':
cp = buf + offs + 1;
mandoc_escape(&cp, NULL, NULL);
offs = cp - buf;
break;
case '\t':
offs++;
break;
default:
break;
}
/* Jump to the next non-whitespace word. */
while (buf[offs] == ' ')
offs++;
/*
* Trailing whitespace. Note that tabs are allowed to be passed
* into the parser as "text", so we only warn about spaces here.
*/
if (buf[offs] == '\0' && buf[offs - 1] == ' ')
mandoc_msg(MANDOCERR_SPACE_EOL, man->parse,
ln, offs - 1, NULL);
/*
* Some macros break next-line scopes; otherwise, remember
* whether we are in next-line scope for a block head.
*/
man_breakscope(man, tok);
bline = man->flags & MAN_BLINE;
/*
* If the line in next-line scope ends with \c, keep the
* next-line scope open for the subsequent input line.
* That is not at all portable, only groff >= 1.22.4
* does it, but *if* this weird idiom occurs in a manual
* page, that's very likely what the author intended.
*/
if (bline) {
cp = strchr(buf + offs, '\0') - 2;
if (cp >= buf && cp[0] == '\\' && cp[1] == 'c')
bline = 0;
}
/* Call to handler... */
assert(man_macros[tok].fp);
(*man_macros[tok].fp)(man, tok, ln, ppos, &offs, buf);
/* In quick mode (for mandocdb), abort after the NAME section. */
if (man->quick && tok == MAN_SH) {
n = man->last;
if (n->type == ROFFT_BODY &&
strcmp(n->prev->child->string, "NAME"))
return 2;
}
/*
* If we are in a next-line scope for a block head,
* close it out now and switch to the body,
* unless the next-line scope is allowed to continue.
*/
if ( ! bline || man->flags & MAN_ELINE ||
man_macros[tok].flags & MAN_NSCOPED)
return 1;
assert(man->flags & MAN_BLINE);
man->flags &= ~MAN_BLINE;
man_unscope(man, man->last->parent);
roff_body_alloc(man, ln, ppos, man->last->tok);
return 1;
}
