* Europagate, 1995
*
* $Log: cclfind.c,v $
- * Revision 1.18 2000-10-17 19:50:28 adam
+ * Revision 1.19 2000-11-16 09:58:02 adam
+ * Implemented local AttributeSet setting for CCL field maps.
+ *
+ * Revision 1.18 2000/10/17 19:50:28 adam
* Implemented and-list and or-list for CCL module.
*
* Revision 1.17 2000/05/01 09:36:50 adam
* value: Value of attribute to seach for
* return: 1 if found; 0 otherwise.
*/
-static int qual_val_type (struct ccl_rpn_attr **qa, int type, int value)
+static int qual_val_type (struct ccl_rpn_attr **qa, int type, int value,
+ char **attset)
{
int i;
struct ccl_rpn_attr *q;
return 0;
for (i = 0; (q=qa[i]); i++)
while (q)
- {
+ {
if (q->type == type && q->value == value)
- return 1;
- q = q->next;
- }
+ {
+ if (attset)
+ *attset = q->set;
+ return 1;
+ }
+ q = q->next;
+ }
return 0;
}
static void strxcat (char *n, const char *src, int len)
{
while (*n)
- n++;
+ n++;
while (--len >= 0)
- *n++ = *src++;
+ *n++ = *src++;
*n = '\0';
}
for (attr = rpn->u.t.attr_list; attr; attr = attr1)
{
attr1 = attr->next;
+ if (attr->set)
+ free (attr->set);
free (attr);
}
break;
}
static struct ccl_rpn_node *find_spec (CCL_parser cclp,
- struct ccl_rpn_attr **qa);
+ struct ccl_rpn_attr **qa);
static int is_term_ok (int look, int *list)
{
}
static struct ccl_rpn_node *search_terms (CCL_parser cclp,
- struct ccl_rpn_attr **qa);
+ struct ccl_rpn_attr **qa);
/*
* add_attr: Add attribute (type/value) to RPN term node.
* p: RPN node of type term.
* type: Type of attribute
* value: Value of attribute
+ * set: Attribute set name
*/
-static void add_attr (struct ccl_rpn_node *p, int type, int value)
+static void add_attr (struct ccl_rpn_node *p, const char *set,
+ int type, int value)
{
struct ccl_rpn_attr *n;
n = (struct ccl_rpn_attr *)malloc (sizeof(*n));
ccl_assert (n);
+ if (set)
+ {
+ n->set = malloc (strlen(set)+1);
+ strcpy (n->set, set);
+ }
+ else
+ n->set = 0;
n->type = type;
n->value = value;
n->next = p->u.t.attr_list;
* return: pointer to node(s); NULL on error.
*/
static struct ccl_rpn_node *search_term_x (CCL_parser cclp,
- struct ccl_rpn_attr **qa,
+ struct ccl_rpn_attr **qa,
int *term_list)
{
struct ccl_rpn_attr *qa_tmp[2];
struct ccl_token *lookahead = cclp->look_token;
int and_list = 0;
int or_list = 0;
+ char *attset;
if (!qa)
{
- /* no qualifier(s) applied. Use 'term' if it is defined */
-
- qa = qa_tmp;
- ccl_assert (qa);
- qa[0] = ccl_qual_search (cclp, "term", 4);
- qa[1] = NULL;
+ /* no qualifier(s) applied. Use 'term' if it is defined */
+
+ qa = qa_tmp;
+ ccl_assert (qa);
+ qa[0] = ccl_qual_search (cclp, "term", 4);
+ qa[1] = NULL;
}
- if (qual_val_type (qa, CCL_BIB1_STR, CCL_BIB1_STR_AND_LIST))
- and_list = 1;
- if (qual_val_type (qa, CCL_BIB1_STR, CCL_BIB1_STR_OR_LIST))
- or_list = 1;
+ if (qual_val_type (qa, CCL_BIB1_STR, CCL_BIB1_STR_AND_LIST, 0))
+ and_list = 1;
+ if (qual_val_type (qa, CCL_BIB1_STR, CCL_BIB1_STR_OR_LIST, 0))
+ or_list = 1;
while (1)
{
- struct ccl_rpn_node *p;
- size_t no, i;
- int left_trunc = 0;
- int right_trunc = 0;
- int mid_trunc = 0;
- int relation_value = -1;
- int position_value = -1;
- int structure_value = -1;
- int truncation_value = -1;
- int completeness_value = -1;
- int len = 0;
- int max = 200;
- if (and_list || or_list)
- max = 1;
-
- /* go through each TERM token. If no truncation attribute is yet
- met, then look for left/right truncation markers (?) and
- set left_trunc/right_trunc/mid_trunc accordingly */
- for (no = 0; no < max && is_term_ok(lookahead->kind, term_list); no++)
- {
- for (i = 0; i<lookahead->len; i++)
- if (truncation_value == -1 && lookahead->name[i] == '?')
- {
- if (no == 0 && i == 0 && lookahead->len >= 1)
- left_trunc = 1;
- else if (!is_term_ok(lookahead->next->kind, term_list) &&
- i == lookahead->len-1 && i >= 1)
- right_trunc = 1;
- else
- mid_trunc = 1;
- }
- len += 1+lookahead->len;
- lookahead = lookahead->next;
- }
-
- if (len == 0)
- break; /* no more terms . stop . */
-
- if (p_top)
- {
- if (or_list)
- p = mk_node (CCL_RPN_OR);
- else if (and_list)
- p = mk_node (CCL_RPN_AND);
- else
- p = mk_node (CCL_RPN_AND);
- p->u.p[0] = p_top;
- p_top = p;
- }
-
- /* create the term node, but wait a moment before adding the term */
- p = mk_node (CCL_RPN_TERM);
- p->u.t.attr_list = NULL;
- p->u.t.term = NULL;
-
- /* make the top node point to us.. */
- if (p_top)
- p_top->u.p[1] = p;
- else
- p_top = p;
-
-
- /* go through all attributes and add them to the attribute list */
- for (i=0; qa && qa[i]; i++)
- {
- struct ccl_rpn_attr *attr;
-
- for (attr = qa[i]; attr; attr = attr->next)
- if (attr->value > 0)
- { /* deal only with REAL attributes (positive) */
- switch (attr->type)
- {
- case CCL_BIB1_REL:
- if (relation_value != -1)
- continue;
- relation_value = attr->value;
- break;
- case CCL_BIB1_POS:
- if (position_value != -1)
- continue;
- position_value = attr->value;
- break;
- case CCL_BIB1_STR:
- if (structure_value != -1)
- continue;
- structure_value = attr->value;
- break;
- case CCL_BIB1_TRU:
- if (truncation_value != -1)
- continue;
- truncation_value = attr->value;
- left_trunc = right_trunc = mid_trunc = 0;
- break;
- case CCL_BIB1_COM:
- if (completeness_value != -1)
- continue;
- completeness_value = attr->value;
- break;
- }
- add_attr (p, attr->type, attr->value);
- }
- }
- /* len now holds the number of characters in the RPN term */
- /* no holds the number of CCL tokens (1 or more) */
-
- if (structure_value == -1 &&
- qual_val_type (qa, CCL_BIB1_STR, CCL_BIB1_STR_WP))
- { /* no structure attribute met. Apply either structure attribute
- WORD or PHRASE depending on number of CCL tokens */
- if (no == 1)
- add_attr (p, CCL_BIB1_STR, 2);
- else
- add_attr (p, CCL_BIB1_STR, 1);
- }
-
- /* make the RPN token */
- p->u.t.term = (char *)malloc (len);
- ccl_assert (p->u.t.term);
- p->u.t.term[0] = '\0';
- for (i = 0; i<no; i++)
- {
- const char *src_str = cclp->look_token->name;
- int src_len = cclp->look_token->len;
-
- if (i == 0 && left_trunc)
- {
- src_len--;
- src_str++;
- }
- else if (i == no-1 && right_trunc)
- src_len--;
- if (src_len)
- {
- int len = strlen(p->u.t.term);
- if (len &&
- !strchr("-+", *src_str) &&
- !strchr("-+", p->u.t.term[len-1]))
- {
- strcat (p->u.t.term, " ");
- }
- }
- strxcat (p->u.t.term, src_str, src_len);
- ADVANCE;
- }
- if (left_trunc && right_trunc)
- {
- if (!qual_val_type (qa, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_BOTH))
- {
- cclp->error_code = CCL_ERR_TRUNC_NOT_BOTH;
- ccl_rpn_delete (p);
- return NULL;
- }
- add_attr (p, CCL_BIB1_TRU, 3);
- }
- else if (right_trunc)
- {
- if (!qual_val_type (qa, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_RIGHT))
- {
- cclp->error_code = CCL_ERR_TRUNC_NOT_RIGHT;
- ccl_rpn_delete (p);
- return NULL;
- }
- add_attr (p, CCL_BIB1_TRU, 1);
- }
- else if (left_trunc)
- {
- if (!qual_val_type (qa, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_LEFT))
- {
- cclp->error_code = CCL_ERR_TRUNC_NOT_LEFT;
- ccl_rpn_delete (p);
- return NULL;
- }
- add_attr (p, CCL_BIB1_TRU, 2);
- }
- else
- {
- if (qual_val_type (qa, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_NONE))
- add_attr (p, CCL_BIB1_TRU, 100);
- }
+ struct ccl_rpn_node *p;
+ size_t no, i;
+ int left_trunc = 0;
+ int right_trunc = 0;
+ int mid_trunc = 0;
+ int relation_value = -1;
+ int position_value = -1;
+ int structure_value = -1;
+ int truncation_value = -1;
+ int completeness_value = -1;
+ int len = 0;
+ int max = 200;
+ if (and_list || or_list)
+ max = 1;
+
+ /* go through each TERM token. If no truncation attribute is yet
+ met, then look for left/right truncation markers (?) and
+ set left_trunc/right_trunc/mid_trunc accordingly */
+ for (no = 0; no < max && is_term_ok(lookahead->kind, term_list); no++)
+ {
+ for (i = 0; i<lookahead->len; i++)
+ if (truncation_value == -1 && lookahead->name[i] == '?')
+ {
+ if (no == 0 && i == 0 && lookahead->len >= 1)
+ left_trunc = 1;
+ else if (!is_term_ok(lookahead->next->kind, term_list) &&
+ i == lookahead->len-1 && i >= 1)
+ right_trunc = 1;
+ else
+ mid_trunc = 1;
+ }
+ len += 1+lookahead->len;
+ lookahead = lookahead->next;
+ }
+
+ if (len == 0)
+ break; /* no more terms . stop . */
+
+ if (p_top)
+ {
+ if (or_list)
+ p = mk_node (CCL_RPN_OR);
+ else if (and_list)
+ p = mk_node (CCL_RPN_AND);
+ else
+ p = mk_node (CCL_RPN_AND);
+ p->u.p[0] = p_top;
+ p_top = p;
+ }
+
+ /* create the term node, but wait a moment before adding the term */
+ p = mk_node (CCL_RPN_TERM);
+ p->u.t.attr_list = NULL;
+ p->u.t.term = NULL;
+
+ /* make the top node point to us.. */
+ if (p_top)
+ p_top->u.p[1] = p;
+ else
+ p_top = p;
+
+
+ /* go through all attributes and add them to the attribute list */
+ for (i=0; qa && qa[i]; i++)
+ {
+ struct ccl_rpn_attr *attr;
+
+ for (attr = qa[i]; attr; attr = attr->next)
+ if (attr->value > 0)
+ { /* deal only with REAL attributes (positive) */
+ switch (attr->type)
+ {
+ case CCL_BIB1_REL:
+ if (relation_value != -1)
+ continue;
+ relation_value = attr->value;
+ break;
+ case CCL_BIB1_POS:
+ if (position_value != -1)
+ continue;
+ position_value = attr->value;
+ break;
+ case CCL_BIB1_STR:
+ if (structure_value != -1)
+ continue;
+ structure_value = attr->value;
+ break;
+ case CCL_BIB1_TRU:
+ if (truncation_value != -1)
+ continue;
+ truncation_value = attr->value;
+ left_trunc = right_trunc = mid_trunc = 0;
+ break;
+ case CCL_BIB1_COM:
+ if (completeness_value != -1)
+ continue;
+ completeness_value = attr->value;
+ break;
+ }
+ add_attr (p, attr->set, attr->type, attr->value);
+ }
+ }
+ /* len now holds the number of characters in the RPN term */
+ /* no holds the number of CCL tokens (1 or more) */
+
+ if (structure_value == -1 &&
+ qual_val_type (qa, CCL_BIB1_STR, CCL_BIB1_STR_WP, &attset))
+ { /* no structure attribute met. Apply either structure attribute
+ WORD or PHRASE depending on number of CCL tokens */
+ if (no == 1)
+ add_attr (p, attset, CCL_BIB1_STR, 2);
+ else
+ add_attr (p, attset, CCL_BIB1_STR, 1);
+ }
+
+ /* make the RPN token */
+ p->u.t.term = (char *)malloc (len);
+ ccl_assert (p->u.t.term);
+ p->u.t.term[0] = '\0';
+ for (i = 0; i<no; i++)
+ {
+ const char *src_str = cclp->look_token->name;
+ int src_len = cclp->look_token->len;
+
+ if (i == 0 && left_trunc)
+ {
+ src_len--;
+ src_str++;
+ }
+ else if (i == no-1 && right_trunc)
+ src_len--;
+ if (src_len)
+ {
+ int len = strlen(p->u.t.term);
+ if (len &&
+ !strchr("-+", *src_str) &&
+ !strchr("-+", p->u.t.term[len-1]))
+ {
+ strcat (p->u.t.term, " ");
+ }
+ }
+ strxcat (p->u.t.term, src_str, src_len);
+ ADVANCE;
+ }
+ if (left_trunc && right_trunc)
+ {
+ if (!qual_val_type (qa, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_BOTH,
+ &attset))
+ {
+ cclp->error_code = CCL_ERR_TRUNC_NOT_BOTH;
+ ccl_rpn_delete (p);
+ return NULL;
+ }
+ add_attr (p, attset, CCL_BIB1_TRU, 3);
+ }
+ else if (right_trunc)
+ {
+ if (!qual_val_type (qa, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_RIGHT,
+ &attset))
+ {
+ cclp->error_code = CCL_ERR_TRUNC_NOT_RIGHT;
+ ccl_rpn_delete (p);
+ return NULL;
+ }
+ add_attr (p, attset, CCL_BIB1_TRU, 1);
+ }
+ else if (left_trunc)
+ {
+ if (!qual_val_type (qa, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_LEFT,
+ &attset))
+ {
+ cclp->error_code = CCL_ERR_TRUNC_NOT_LEFT;
+ ccl_rpn_delete (p);
+ return NULL;
+ }
+ add_attr (p, attset, CCL_BIB1_TRU, 2);
+ }
+ else
+ {
+ if (qual_val_type (qa, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_NONE,
+ &attset))
+ add_attr (p, attset, CCL_BIB1_TRU, 100);
+ }
}
if (!p_top)
cclp->error_code = CCL_ERR_TERM_EXPECTED;
}
static struct ccl_rpn_node *search_term (CCL_parser cclp,
- struct ccl_rpn_attr **qa)
+ struct ccl_rpn_attr **qa)
{
static int list[] = {CCL_TOK_TERM, CCL_TOK_COMMA, -1};
return search_term_x(cclp, qa, list);
struct ccl_rpn_attr **ap;
int no = 0;
int i, rel;
+ char *attset;
#if 0
if (qa)
{
}
#endif
for (lookahead = cclp->look_token; lookahead != la;
- lookahead=lookahead->next)
+ lookahead=lookahead->next)
no++;
if (qa)
for (i=0; qa[i]; i++)
- no++;
+ no++;
ap = (struct ccl_rpn_attr **)malloc ((no+1) * sizeof(*ap));
ccl_assert (ap);
for (i = 0; cclp->look_token != la; i++)
{
ap[i] = ccl_qual_search (cclp, cclp->look_token->name,
- cclp->look_token->len);
+ cclp->look_token->len);
if (!ap[i])
{
cclp->error_code = CCL_ERR_UNKNOWN_QUAL;
}
if (qa)
while (*qa)
- ap[i++] = *qa++;
+ ap[i++] = *qa++;
ap[i] = NULL;
- if (!qual_val_type (ap, CCL_BIB1_REL, CCL_BIB1_REL_ORDER))
+ if (!qual_val_type(ap, CCL_BIB1_REL, CCL_BIB1_REL_ORDER, &attset))
{
/* unordered relation */
struct ccl_rpn_node *p;
{
struct ccl_rpn_node *p1;
if (!(p1 = search_term (cclp, ap)))
- {
- free (ap);
- return NULL;
- }
+ {
+ free (ap);
+ return NULL;
+ }
ADVANCE; /* skip '-' */
if (KIND == CCL_TOK_TERM) /* = term - term ? */
{
struct ccl_rpn_node *p2;
if (!(p2 = search_term (cclp, ap)))
- {
+ {
ccl_rpn_delete (p1);
- free (ap);
- return NULL;
- }
+ free (ap);
+ return NULL;
+ }
p = mk_node (CCL_RPN_AND);
p->u.p[0] = p1;
- add_attr (p1, CCL_BIB1_REL, 4);
+ add_attr (p1, attset, CCL_BIB1_REL, 4);
p->u.p[1] = p2;
- add_attr (p2, CCL_BIB1_REL, 2);
+ add_attr (p2, attset, CCL_BIB1_REL, 2);
free (ap);
return p;
}
else /* = term - */
{
- add_attr (p1, CCL_BIB1_REL, 4);
+ add_attr (p1, attset, CCL_BIB1_REL, 4);
free (ap);
return p1;
}
{
ADVANCE;
if (!(p = search_term (cclp, ap)))
- {
- free (ap);
- return NULL;
- }
- add_attr (p, CCL_BIB1_REL, 2);
+ {
+ free (ap);
+ return NULL;
+ }
+ add_attr (p, attset, CCL_BIB1_REL, 2);
free (ap);
return p;
}
- else if (KIND == CCL_TOK_LP)
- {
+ else if (KIND == CCL_TOK_LP)
+ {
ADVANCE;
if (!(p = find_spec (cclp, ap)))
{
return NULL;
}
ADVANCE;
- free (ap);
- return p;
- }
- else
- {
+ free (ap);
+ return p;
+ }
+ else
+ {
if (!(p = search_terms (cclp, ap)))
- {
- free (ap);
- return NULL;
- }
- add_attr (p, CCL_BIB1_REL, rel);
- free (ap);
- return p;
- }
+ {
+ free (ap);
+ return NULL;
+ }
+ add_attr (p, attset, CCL_BIB1_REL, rel);
+ free (ap);
+ return p;
+ }
cclp->error_code = CCL_ERR_TERM_EXPECTED;
}
free (ap);
* return: pointer to node(s); NULL on error.
*/
static struct ccl_rpn_node *search_terms (CCL_parser cclp,
- struct ccl_rpn_attr **qa)
+ struct ccl_rpn_attr **qa)
{
static int list[] = {
CCL_TOK_TERM, CCL_TOK_COMMA,CCL_TOK_EQ, CCL_TOK_REL, -1};
return NULL;
while (1)
{
- if (KIND == CCL_TOK_PROX)
- {
- ADVANCE;
- p2 = search_term_x (cclp, qa, list);
+ if (KIND == CCL_TOK_PROX)
+ {
+ ADVANCE;
+ p2 = search_term_x (cclp, qa, list);
if (!p2)
{
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (CCL_RPN_PROX);
- pn->u.p[0] = p1;
- pn->u.p[1] = p2;
- p1 = pn;
- }
- else if (is_term_ok(KIND, list))
- {
- p2 = search_term_x (cclp, qa, list);
+ pn = mk_node (CCL_RPN_PROX);
+ pn->u.p[0] = p1;
+ pn->u.p[1] = p2;
+ p1 = pn;
+ }
+ else if (is_term_ok(KIND, list))
+ {
+ p2 = search_term_x (cclp, qa, list);
if (!p2)
{
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (CCL_RPN_PROX);
- pn->u.p[0] = p1;
- pn->u.p[1] = p2;
- p1 = pn;
- }
- else
- break;
+ pn = mk_node (CCL_RPN_PROX);
+ pn->u.p[0] = p1;
+ pn->u.p[1] = p2;
+ p1 = pn;
+ }
+ else
+ break;
}
return p1;
}
* return: pointer to node(s); NULL on error.
*/
static struct ccl_rpn_node *search_elements (CCL_parser cclp,
- struct ccl_rpn_attr **qa)
+ struct ccl_rpn_attr **qa)
{
struct ccl_rpn_node *p1;
struct ccl_token *lookahead;
if (KIND == CCL_TOK_LP)
{
- ADVANCE;
- p1 = find_spec (cclp, qa);
+ ADVANCE;
+ p1 = find_spec (cclp, qa);
if (!p1)
return NULL;
if (KIND != CCL_TOK_RP)
ccl_rpn_delete (p1);
return NULL;
}
- ADVANCE;
- return p1;
+ ADVANCE;
+ return p1;
}
else if (KIND == CCL_TOK_SET)
{
- ADVANCE;
+ ADVANCE;
if (KIND == CCL_TOK_EQ)
ADVANCE;
if (KIND != CCL_TOK_TERM)
cclp->error_code = CCL_ERR_SETNAME_EXPECTED;
return NULL;
}
- p1 = mk_node (CCL_RPN_SET);
- p1->u.setname = copy_token_name (cclp->look_token);
- ADVANCE;
- return p1;
+ p1 = mk_node (CCL_RPN_SET);
+ p1->u.setname = copy_token_name (cclp->look_token);
+ ADVANCE;
+ return p1;
}
lookahead = cclp->look_token;
{
lookahead = lookahead->next;
if (lookahead->kind == CCL_TOK_REL || lookahead->kind == CCL_TOK_EQ)
- return qualifiers (cclp, lookahead, qa);
+ return qualifiers (cclp, lookahead, qa);
if (lookahead->kind != CCL_TOK_COMMA)
break;
lookahead = lookahead->next;
* return: pointer to node(s); NULL on error.
*/
static struct ccl_rpn_node *find_spec (CCL_parser cclp,
- struct ccl_rpn_attr **qa)
+ struct ccl_rpn_attr **qa)
{
struct ccl_rpn_node *p1, *p2, *pn;
if (!(p1 = search_elements (cclp, qa)))
return NULL;
while (1)
{
- switch (KIND)
- {
- case CCL_TOK_AND:
- ADVANCE;
- p2 = search_elements (cclp, qa);
+ switch (KIND)
+ {
+ case CCL_TOK_AND:
+ ADVANCE;
+ p2 = search_elements (cclp, qa);
if (!p2)
{
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (CCL_RPN_AND);
- pn->u.p[0] = p1;
- pn->u.p[1] = p2;
- p1 = pn;
- continue;
- case CCL_TOK_OR:
- ADVANCE;
- p2 = search_elements (cclp, qa);
+ pn = mk_node (CCL_RPN_AND);
+ pn->u.p[0] = p1;
+ pn->u.p[1] = p2;
+ p1 = pn;
+ continue;
+ case CCL_TOK_OR:
+ ADVANCE;
+ p2 = search_elements (cclp, qa);
if (!p2)
{
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (CCL_RPN_OR);
- pn->u.p[0] = p1;
- pn->u.p[1] = p2;
- p1 = pn;
- continue;
- case CCL_TOK_NOT:
- ADVANCE;
- p2 = search_elements (cclp, qa);
+ pn = mk_node (CCL_RPN_OR);
+ pn->u.p[0] = p1;
+ pn->u.p[1] = p2;
+ p1 = pn;
+ continue;
+ case CCL_TOK_NOT:
+ ADVANCE;
+ p2 = search_elements (cclp, qa);
if (!p2)
{
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (CCL_RPN_NOT);
- pn->u.p[0] = p1;
- pn->u.p[1] = p2;
- p1 = pn;
- continue;
- }
- break;
+ pn = mk_node (CCL_RPN_NOT);
+ pn->u.p[0] = p1;
+ pn->u.p[1] = p2;
+ p1 = pn;
+ continue;
+ }
+ break;
}
return p1;
}