+ return NULL;
+}
+
+/*
+ * Get the next token from the input stream using the given quote
+ * character.
+ * Optionally make any replacements.
+ */
+static const char *
+eqn_next(struct eqn_node *ep, char quote, size_t *sz, int repl)
+{
+ char *start, *next;
+ int q, diff, lim;
+ size_t ssz, dummy;
+ struct eqn_def *def;
+
+ if (NULL == sz)
+ sz = &dummy;
+
+ lim = 0;
+ ep->rew = ep->cur;
+again:
+ /* Prevent self-definitions. */
+
+ if (lim >= EQN_NEST_MAX) {
+ mandoc_msg(MANDOCERR_ROFFLOOP, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, NULL);
+ return NULL;
+ }
+
+ ep->cur = ep->rew;
+ start = &ep->data[(int)ep->cur];
+ q = 0;
+
+ if ('\0' == *start)
+ return NULL;
+
+ if (quote == *start) {
+ ep->cur++;
+ q = 1;
+ }
+
+ start = &ep->data[(int)ep->cur];
+
+ if ( ! q) {
+ if ('{' == *start || '}' == *start)
+ ssz = 1;
+ else
+ ssz = strcspn(start + 1, " ^~\"{}\t") + 1;
+ next = start + (int)ssz;
+ if ('\0' == *next)
+ next = NULL;
+ } else
+ next = strchr(start, quote);
+
+ if (NULL != next) {
+ *sz = (size_t)(next - start);
+ ep->cur += *sz;
+ if (q)
+ ep->cur++;
+ while (' ' == ep->data[(int)ep->cur] ||
+ '\t' == ep->data[(int)ep->cur] ||
+ '^' == ep->data[(int)ep->cur] ||
+ '~' == ep->data[(int)ep->cur])
+ ep->cur++;
+ } else {
+ if (q)
+ mandoc_msg(MANDOCERR_ARG_QUOTE, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, NULL);
+ next = strchr(start, '\0');
+ *sz = (size_t)(next - start);
+ ep->cur += *sz;
+ }
+
+ /* Quotes aren't expanded for values. */
+
+ if (q || ! repl)
+ return start;
+
+ if (NULL != (def = eqn_def_find(ep, start, *sz))) {
+ diff = def->valsz - *sz;
+
+ if (def->valsz > *sz) {
+ ep->sz += diff;
+ ep->data = mandoc_realloc(ep->data, ep->sz + 1);
+ ep->data[ep->sz] = '\0';
+ start = &ep->data[(int)ep->rew];
+ }
+
+ diff = def->valsz - *sz;
+ memmove(start + *sz + diff, start + *sz,
+ (strlen(start) - *sz) + 1);
+ memcpy(start, def->val, def->valsz);
+ lim++;
+ goto again;
+ }
+
+ return start;
+}
+
+/*
+ * Get the next delimited token using the default current quote
+ * character.
+ */
+static const char *
+eqn_nexttok(struct eqn_node *ep, size_t *sz)
+{
+
+ return eqn_next(ep, '"', sz, 1);
+}
+
+/*
+ * Get next token without replacement.
+ */
+static const char *
+eqn_nextrawtok(struct eqn_node *ep, size_t *sz)
+{
+
+ return eqn_next(ep, '"', sz, 0);
+}
+
+/*
+ * Parse a token from the stream of text.
+ * A token consists of one of the recognised eqn(7) strings.
+ * Strings are separated by delimiting marks.
+ * This returns EQN_TOK_EOF when there are no more tokens.
+ * If the token is an unrecognised string literal, then it returns
+ * EQN_TOK__MAX and sets the "p" pointer to an allocated, nil-terminated
+ * string.
+ * This must be later freed with free(3).
+ */
+static enum eqn_tok
+eqn_tok_parse(struct eqn_node *ep, char **p)
+{
+ const char *start;
+ size_t i, sz;
+ int quoted;
+
+ if (NULL != p)
+ *p = NULL;
+
+ quoted = ep->data[ep->cur] == '"';
+
+ if (NULL == (start = eqn_nexttok(ep, &sz)))
+ return EQN_TOK_EOF;
+
+ if (quoted) {
+ if (p != NULL)
+ *p = mandoc_strndup(start, sz);
+ return EQN_TOK__MAX;
+ }
+
+ for (i = 0; i < EQN_TOK__MAX; i++) {
+ if (NULL == eqn_toks[i])
+ continue;
+ if (STRNEQ(start, sz, eqn_toks[i], strlen(eqn_toks[i])))
+ break;
+ }
+
+ if (i == EQN_TOK__MAX && NULL != p)
+ *p = mandoc_strndup(start, sz);
+
+ return i;
+}
+
+static void
+eqn_box_free(struct eqn_box *bp)
+{
+
+ if (bp->first)
+ eqn_box_free(bp->first);
+ if (bp->next)
+ eqn_box_free(bp->next);
+
+ free(bp->text);
+ free(bp->left);
+ free(bp->right);
+ free(bp->top);
+ free(bp->bottom);
+ free(bp);
+}
+
+/*
+ * Allocate a box as the last child of the parent node.
+ */
+static struct eqn_box *
+eqn_box_alloc(struct eqn_node *ep, struct eqn_box *parent)
+{
+ struct eqn_box *bp;
+
+ bp = mandoc_calloc(1, sizeof(struct eqn_box));
+ bp->parent = parent;
+ bp->parent->args++;
+ bp->expectargs = UINT_MAX;
+ bp->size = ep->gsize;
+
+ if (NULL != parent->first) {
+ parent->last->next = bp;
+ bp->prev = parent->last;
+ } else
+ parent->first = bp;
+
+ parent->last = bp;
+ return bp;
+}
+
+/*
+ * Reparent the current last node (of the current parent) under a new
+ * EQN_SUBEXPR as the first element.
+ * Then return the new parent.
+ * The new EQN_SUBEXPR will have a two-child limit.
+ */
+static struct eqn_box *
+eqn_box_makebinary(struct eqn_node *ep,
+ enum eqn_post pos, struct eqn_box *parent)
+{
+ struct eqn_box *b, *newb;
+
+ assert(NULL != parent->last);
+ b = parent->last;
+ if (parent->last == parent->first)
+ parent->first = NULL;
+ parent->args--;
+ parent->last = b->prev;
+ b->prev = NULL;
+ newb = eqn_box_alloc(ep, parent);
+ newb->pos = pos;
+ newb->type = EQN_SUBEXPR;
+ newb->expectargs = 2;
+ newb->args = 1;
+ newb->first = newb->last = b;
+ newb->first->next = NULL;
+ b->parent = newb;
+ return newb;
+}
+
+/*
+ * Parse the "delim" control statement.
+ */
+static void
+eqn_delim(struct eqn_node *ep)
+{
+ const char *start;
+ size_t sz;
+
+ if ((start = eqn_nextrawtok(ep, &sz)) == NULL)
+ mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, "delim");
+ else if (strncmp(start, "off", 3) == 0)
+ ep->delim = 0;
+ else if (strncmp(start, "on", 2) == 0) {
+ if (ep->odelim && ep->cdelim)
+ ep->delim = 1;
+ } else if (start[1] != '\0') {
+ ep->odelim = start[0];
+ ep->cdelim = start[1];
+ ep->delim = 1;
+ }
+}
+
+/*
+ * Undefine a previously-defined string.
+ */
+static void
+eqn_undef(struct eqn_node *ep)
+{
+ const char *start;
+ struct eqn_def *def;
+ size_t sz;
+
+ if ((start = eqn_nextrawtok(ep, &sz)) == NULL) {
+ mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, "undef");
+ return;
+ }
+ if ((def = eqn_def_find(ep, start, sz)) == NULL)
+ return;
+ free(def->key);
+ free(def->val);
+ def->key = def->val = NULL;
+ def->keysz = def->valsz = 0;
+}
+
+static void
+eqn_def(struct eqn_node *ep)
+{
+ const char *start;
+ size_t sz;
+ struct eqn_def *def;
+ int i;
+
+ if ((start = eqn_nextrawtok(ep, &sz)) == NULL) {
+ mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, "define");
+ return;
+ }
+
+ /*
+ * Search for a key that already exists.
+ * Create a new key if none is found.
+ */
+ if (NULL == (def = eqn_def_find(ep, start, sz))) {
+ /* Find holes in string array. */
+ for (i = 0; i < (int)ep->defsz; i++)
+ if (0 == ep->defs[i].keysz)
+ break;
+
+ if (i == (int)ep->defsz) {
+ ep->defsz++;
+ ep->defs = mandoc_reallocarray(ep->defs,
+ ep->defsz, sizeof(struct eqn_def));
+ ep->defs[i].key = ep->defs[i].val = NULL;
+ }
+
+ def = ep->defs + i;
+ free(def->key);
+ def->key = mandoc_strndup(start, sz);
+ def->keysz = sz;
+ }
+
+ start = eqn_next(ep, ep->data[(int)ep->cur], &sz, 0);
+ if (start == NULL) {
+ mandoc_vmsg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, "define %s", def->key);
+ free(def->key);
+ free(def->val);
+ def->key = def->val = NULL;
+ def->keysz = def->valsz = 0;
+ return;
+ }
+ free(def->val);
+ def->val = mandoc_strndup(start, sz);
+ def->valsz = sz;
+}
+
+/*
+ * Recursively parse an eqn(7) expression.
+ */
+static enum rofferr
+eqn_parse(struct eqn_node *ep, struct eqn_box *parent)
+{
+ char sym[64];
+ struct eqn_box *cur;
+ const char *start;
+ char *p;
+ size_t i, sz;
+ enum eqn_tok tok, subtok;
+ enum eqn_post pos;
+ int size;
+
+ assert(parent != NULL);
+
+ /*
+ * Empty equation.
+ * Do not add it to the high-level syntax tree.
+ */
+
+ if (ep->data == NULL)
+ return ROFF_IGN;
+
+next_tok:
+ tok = eqn_tok_parse(ep, &p);
+
+this_tok:
+ switch (tok) {
+ case (EQN_TOK_UNDEF):
+ eqn_undef(ep);
+ break;
+ case (EQN_TOK_NDEFINE):
+ case (EQN_TOK_DEFINE):
+ eqn_def(ep);
+ break;
+ case (EQN_TOK_TDEFINE):
+ if (eqn_nextrawtok(ep, NULL) == NULL ||
+ eqn_next(ep, ep->data[(int)ep->cur], NULL, 0) == NULL)
+ mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, "tdefine");
+ break;
+ case (EQN_TOK_DELIM):
+ eqn_delim(ep);
+ break;
+ case (EQN_TOK_GFONT):
+ if (eqn_nextrawtok(ep, NULL) == NULL)
+ mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ break;
+ case (EQN_TOK_MARK):
+ case (EQN_TOK_LINEUP):
+ /* Ignore these. */
+ break;
+ case (EQN_TOK_DYAD):
+ case (EQN_TOK_VEC):
+ case (EQN_TOK_UNDER):
+ case (EQN_TOK_BAR):
+ case (EQN_TOK_TILDE):
+ case (EQN_TOK_HAT):
+ case (EQN_TOK_DOT):
+ case (EQN_TOK_DOTDOT):
+ if (parent->last == NULL) {
+ mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ cur = eqn_box_alloc(ep, parent);
+ cur->type = EQN_TEXT;
+ cur->text = mandoc_strdup("");
+ }
+ parent = eqn_box_makebinary(ep, EQNPOS_NONE, parent);
+ parent->type = EQN_LISTONE;
+ parent->expectargs = 1;
+ switch (tok) {
+ case (EQN_TOK_DOTDOT):
+ strlcpy(sym, "\\[ad]", sizeof(sym));
+ break;
+ case (EQN_TOK_VEC):
+ strlcpy(sym, "\\[->]", sizeof(sym));
+ break;
+ case (EQN_TOK_DYAD):
+ strlcpy(sym, "\\[<>]", sizeof(sym));
+ break;
+ case (EQN_TOK_TILDE):
+ strlcpy(sym, "\\[a~]", sizeof(sym));
+ break;
+ case (EQN_TOK_UNDER):
+ strlcpy(sym, "\\[ul]", sizeof(sym));
+ break;
+ case (EQN_TOK_BAR):
+ strlcpy(sym, "\\[rl]", sizeof(sym));
+ break;
+ case (EQN_TOK_DOT):
+ strlcpy(sym, "\\[a.]", sizeof(sym));
+ break;
+ case (EQN_TOK_HAT):
+ strlcpy(sym, "\\[ha]", sizeof(sym));
+ break;
+ default:
+ abort();
+ }
+
+ switch (tok) {
+ case (EQN_TOK_DOTDOT):
+ case (EQN_TOK_VEC):
+ case (EQN_TOK_DYAD):
+ case (EQN_TOK_TILDE):
+ case (EQN_TOK_BAR):
+ case (EQN_TOK_DOT):
+ case (EQN_TOK_HAT):
+ parent->top = mandoc_strdup(sym);
+ break;
+ case (EQN_TOK_UNDER):
+ parent->bottom = mandoc_strdup(sym);
+ break;
+ default:
+ abort();
+ }
+ parent = parent->parent;
+ break;
+ case (EQN_TOK_FWD):
+ case (EQN_TOK_BACK):
+ case (EQN_TOK_DOWN):
+ case (EQN_TOK_UP):
+ subtok = eqn_tok_parse(ep, NULL);
+ if (subtok != EQN_TOK__MAX) {
+ mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ tok = subtok;
+ goto this_tok;
+ }
+ break;
+ case (EQN_TOK_FAT):
+ case (EQN_TOK_ROMAN):
+ case (EQN_TOK_ITALIC):
+ case (EQN_TOK_BOLD):
+ while (parent->args == parent->expectargs)
+ parent = parent->parent;
+ /*
+ * These values apply to the next word or sequence of
+ * words; thus, we mark that we'll have a child with
+ * exactly one of those.
+ */
+ parent = eqn_box_alloc(ep, parent);
+ parent->type = EQN_LISTONE;
+ parent->expectargs = 1;
+ switch (tok) {
+ case (EQN_TOK_FAT):
+ parent->font = EQNFONT_FAT;
+ break;
+ case (EQN_TOK_ROMAN):
+ parent->font = EQNFONT_ROMAN;
+ break;
+ case (EQN_TOK_ITALIC):
+ parent->font = EQNFONT_ITALIC;
+ break;
+ case (EQN_TOK_BOLD):
+ parent->font = EQNFONT_BOLD;
+ break;
+ default:
+ abort();
+ }
+ break;
+ case (EQN_TOK_SIZE):
+ case (EQN_TOK_GSIZE):
+ /* Accept two values: integral size and a single. */
+ if (NULL == (start = eqn_nexttok(ep, &sz))) {
+ mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ break;
+ }
+ size = mandoc_strntoi(start, sz, 10);
+ if (-1 == size) {
+ mandoc_msg(MANDOCERR_IT_NONUM, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ break;
+ }
+ if (EQN_TOK_GSIZE == tok) {
+ ep->gsize = size;
+ break;
+ }
+ parent = eqn_box_alloc(ep, parent);
+ parent->type = EQN_LISTONE;
+ parent->expectargs = 1;
+ parent->size = size;
+ break;
+ case (EQN_TOK_FROM):
+ case (EQN_TOK_TO):
+ case (EQN_TOK_SUB):
+ case (EQN_TOK_SUP):
+ /*
+ * We have a left-right-associative expression.
+ * Repivot under a positional node, open a child scope
+ * and keep on reading.
+ */
+ if (parent->last == NULL) {
+ mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ cur = eqn_box_alloc(ep, parent);
+ cur->type = EQN_TEXT;
+ cur->text = mandoc_strdup("");
+ }
+ /* Handle the "subsup" and "fromto" positions. */
+ if (EQN_TOK_SUP == tok && parent->pos == EQNPOS_SUB) {
+ parent->expectargs = 3;
+ parent->pos = EQNPOS_SUBSUP;
+ break;
+ }
+ if (EQN_TOK_TO == tok && parent->pos == EQNPOS_FROM) {
+ parent->expectargs = 3;
+ parent->pos = EQNPOS_FROMTO;
+ break;
+ }
+ switch (tok) {
+ case (EQN_TOK_FROM):
+ pos = EQNPOS_FROM;
+ break;
+ case (EQN_TOK_TO):
+ pos = EQNPOS_TO;
+ break;
+ case (EQN_TOK_SUP):
+ pos = EQNPOS_SUP;
+ break;
+ case (EQN_TOK_SUB):
+ pos = EQNPOS_SUB;
+ break;
+ default:
+ abort();
+ }
+ parent = eqn_box_makebinary(ep, pos, parent);
+ break;
+ case (EQN_TOK_SQRT):
+ while (parent->args == parent->expectargs)
+ parent = parent->parent;
+ /*
+ * Accept a left-right-associative set of arguments just
+ * like sub and sup and friends but without rebalancing
+ * under a pivot.
+ */
+ parent = eqn_box_alloc(ep, parent);
+ parent->type = EQN_SUBEXPR;
+ parent->pos = EQNPOS_SQRT;
+ parent->expectargs = 1;
+ break;
+ case (EQN_TOK_OVER):
+ /*
+ * We have a right-left-associative fraction.
+ * Close out anything that's currently open, then
+ * rebalance and continue reading.
+ */
+ if (parent->last == NULL) {
+ mandoc_msg(MANDOCERR_EQN_NOBOX, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ cur = eqn_box_alloc(ep, parent);
+ cur->type = EQN_TEXT;
+ cur->text = mandoc_strdup("");
+ }
+ while (EQN_SUBEXPR == parent->type)
+ parent = parent->parent;
+ parent = eqn_box_makebinary(ep, EQNPOS_OVER, parent);
+ break;
+ case (EQN_TOK_RIGHT):
+ case (EQN_TOK_BRACE_CLOSE):
+ /*
+ * Close out the existing brace.
+ * FIXME: this is a shitty sentinel: we should really
+ * have a native EQN_BRACE type or whatnot.
+ */
+ for (cur = parent; cur != NULL; cur = cur->parent)
+ if (cur->type == EQN_LIST &&
+ (tok == EQN_TOK_BRACE_CLOSE ||
+ cur->left != NULL))
+ break;
+ if (cur == NULL) {
+ mandoc_msg(MANDOCERR_BLK_NOTOPEN, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ break;
+ }
+ parent = cur;
+ if (EQN_TOK_RIGHT == tok) {
+ if (NULL == (start = eqn_nexttok(ep, &sz))) {
+ mandoc_msg(MANDOCERR_REQ_EMPTY,
+ ep->parse, ep->eqn.ln,
+ ep->eqn.pos, eqn_toks[tok]);
+ break;
+ }
+ /* Handling depends on right/left. */
+ if (STRNEQ(start, sz, "ceiling", 7)) {
+ strlcpy(sym, "\\[rc]", sizeof(sym));
+ parent->right = mandoc_strdup(sym);
+ } else if (STRNEQ(start, sz, "floor", 5)) {
+ strlcpy(sym, "\\[rf]", sizeof(sym));
+ parent->right = mandoc_strdup(sym);
+ } else
+ parent->right = mandoc_strndup(start, sz);
+ }
+ parent = parent->parent;
+ if (tok == EQN_TOK_BRACE_CLOSE &&
+ (parent->type == EQN_PILE ||
+ parent->type == EQN_MATRIX))
+ parent = parent->parent;
+ /* Close out any "singleton" lists. */
+ while (parent->type == EQN_LISTONE &&
+ parent->args == parent->expectargs)
+ parent = parent->parent;
+ break;
+ case (EQN_TOK_BRACE_OPEN):
+ case (EQN_TOK_LEFT):
+ /*
+ * If we already have something in the stack and we're
+ * in an expression, then rewind til we're not any more
+ * (just like with the text node).
+ */
+ while (parent->args == parent->expectargs)
+ parent = parent->parent;
+ if (EQN_TOK_LEFT == tok &&
+ (start = eqn_nexttok(ep, &sz)) == NULL) {
+ mandoc_msg(MANDOCERR_REQ_EMPTY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ break;
+ }
+ parent = eqn_box_alloc(ep, parent);
+ parent->type = EQN_LIST;
+ if (EQN_TOK_LEFT == tok) {
+ if (STRNEQ(start, sz, "ceiling", 7)) {
+ strlcpy(sym, "\\[lc]", sizeof(sym));
+ parent->left = mandoc_strdup(sym);
+ } else if (STRNEQ(start, sz, "floor", 5)) {
+ strlcpy(sym, "\\[lf]", sizeof(sym));
+ parent->left = mandoc_strdup(sym);
+ } else
+ parent->left = mandoc_strndup(start, sz);
+ }
+ break;
+ case (EQN_TOK_PILE):
+ case (EQN_TOK_LPILE):
+ case (EQN_TOK_RPILE):
+ case (EQN_TOK_CPILE):
+ case (EQN_TOK_CCOL):
+ case (EQN_TOK_LCOL):
+ case (EQN_TOK_RCOL):
+ while (parent->args == parent->expectargs)
+ parent = parent->parent;
+ parent = eqn_box_alloc(ep, parent);
+ parent->type = EQN_PILE;
+ parent->expectargs = 1;
+ break;
+ case (EQN_TOK_ABOVE):
+ for (cur = parent; cur != NULL; cur = cur->parent)
+ if (cur->type == EQN_PILE)
+ break;
+ if (cur == NULL) {
+ mandoc_msg(MANDOCERR_IT_STRAY, ep->parse,
+ ep->eqn.ln, ep->eqn.pos, eqn_toks[tok]);
+ break;
+ }
+ parent = eqn_box_alloc(ep, cur);
+ parent->type = EQN_LIST;
+ break;
+ case (EQN_TOK_MATRIX):
+ while (parent->args == parent->expectargs)
+ parent = parent->parent;
+ parent = eqn_box_alloc(ep, parent);
+ parent->type = EQN_MATRIX;
+ parent->expectargs = 1;
+ break;
+ case (EQN_TOK_EOF):
+ /*
+ * End of file!
+ * TODO: make sure we're not in an open subexpression.
+ */
+ return ROFF_EQN;
+ default:
+ assert(tok == EQN_TOK__MAX);
+ assert(NULL != p);
+ /*
+ * If we already have something in the stack and we're
+ * in an expression, then rewind til we're not any more.
+ */
+ while (parent->args == parent->expectargs)
+ parent = parent->parent;
+ cur = eqn_box_alloc(ep, parent);
+ cur->type = EQN_TEXT;
+ for (i = 0; i < EQNSYM__MAX; i++)
+ if (0 == strcmp(eqnsyms[i].str, p)) {
+ (void)snprintf(sym, sizeof(sym),
+ "\\[%s]", eqnsyms[i].sym);
+ cur->text = mandoc_strdup(sym);
+ free(p);
+ break;
+ }
+
+ if (i == EQNSYM__MAX)
+ cur->text = p;
+ /*
+ * Post-process list status.
+ */
+ while (parent->type == EQN_LISTONE &&
+ parent->args == parent->expectargs)
+ parent = parent->parent;
+ break;
+ }
+ goto next_tok;
+}
+
+enum rofferr
+eqn_end(struct eqn_node **epp)
+{
+ struct eqn_node *ep;
+
+ ep = *epp;
+ *epp = NULL;
+
+ ep->eqn.root = mandoc_calloc(1, sizeof(struct eqn_box));
+ ep->eqn.root->expectargs = UINT_MAX;
+ return eqn_parse(ep, ep->eqn.root);
git.ckatri.com / mandoc.git / blobdiff