* Europagate, 1995
*
* $Log: cclfind.c,v $
- * Revision 1.2 1995/02/13 15:15:07 adam
+ * Revision 1.7 1995/02/14 19:55:10 adam
+ * Header files ccl.h/cclp.h are gone! They have been merged an
+ * moved to ../include/ccl.h.
+ * Node kind(s) in ccl_rpn_node have changed names.
+ *
+ * Revision 1.6 1995/02/14 16:20:55 adam
+ * Qualifiers are read from a file now.
+ *
+ * Revision 1.5 1995/02/14 14:12:41 adam
+ * Ranges for ordered qualfiers implemented (e.g. pd=1980-1990).
+ *
+ * Revision 1.4 1995/02/14 13:16:29 adam
+ * Left and/or right truncation implemented.
+ *
+ * Revision 1.3 1995/02/14 10:25:56 adam
+ * The constructions 'qualifier rel term ...' implemented.
+ *
+ * Revision 1.2 1995/02/13 15:15:07 adam
* Added handling of qualifiers. Not finished yet.
*
* Revision 1.1 1995/02/13 12:35:20 adam
#include <assert.h>
#include <string.h>
-#include "cclp.h"
+#include <ccl.h>
static struct ccl_token *look_token;
static int ccl_error;
#define ADVANCE look_token = look_token->next
#define ADVX(x) x=(x)->next
+static struct ccl_rpn_attr *qual_val (struct ccl_rpn_attr *list, int type)
+{
+ while (list)
+ {
+ if (list->type == type)
+ return list;
+ list = list->next;
+ }
+ return NULL;
+}
+
+static int qual_val_type (struct ccl_rpn_attr *list, int type, int value)
+{
+ while (list)
+ {
+ if (list->type == type && list->value == value)
+ return 1;
+ list = list->next;
+ }
+ return 0;
+}
+
static void strxcat (char *n, const char *src, int len)
{
while (*n)
return;
switch (rpn->kind)
{
- case AND:
- case OR:
- case NOT:
+ case CCL_RPN_AND:
+ case CCL_RPN_OR:
+ case CCL_RPN_NOT:
ccl_rpn_delete (rpn->u.p[0]);
ccl_rpn_delete (rpn->u.p[1]);
break;
- case TERM:
+ case CCL_RPN_TERM:
free (rpn->u.t.term);
for (attr = rpn->u.t.attr_list; attr; attr = attr1)
{
free (attr);
}
break;
- case SET:
+ case CCL_RPN_SET:
free (rpn->u.setname);
break;
- case PROX:
+ case CCL_RPN_PROX:
ccl_rpn_delete (rpn->u.p[0]);
ccl_rpn_delete (rpn->u.p[1]);
break;
free (rpn);
}
-static struct ccl_rpn_node *find_spec (struct ccl_qualifier **qa);
-static struct ccl_rpn_node *search_terms (struct ccl_qualifier **qa);
+static struct ccl_rpn_node *find_spec (struct ccl_rpn_attr **qa);
+static struct ccl_rpn_node *search_terms (struct ccl_rpn_attr **qa);
static void add_attr (struct ccl_rpn_node *p, int type, int value)
{
p->u.t.attr_list = n;
}
-static struct ccl_rpn_node *search_term (struct ccl_qualifier **qa)
+static struct ccl_rpn_node *search_term (struct ccl_rpn_attr **qa)
{
struct ccl_rpn_node *p;
+ struct ccl_rpn_attr *attr;
struct ccl_token *lookahead = look_token;
int len = 0;
- int no = 0;
+ int no, i;
+ int left_trunc = 0;
+ int right_trunc = 0;
+ int mid_trunc = 0;
if (KIND != CCL_TOK_TERM)
{
ccl_error = CCL_ERR_TERM_EXPECTED;
return NULL;
}
- while (lookahead->kind == CCL_TOK_TERM)
+ for (no = 0; lookahead->kind == CCL_TOK_TERM; no++)
{
- no++;
- len += 1+lookahead->len;
+ for (i = 0; i<lookahead->len; i++)
+ if (lookahead->name[i] == '?')
+ {
+ if (no == 0 && i == 0 && lookahead->len >= 1)
+ left_trunc = 1;
+ else if (lookahead->next->kind != CCL_TOK_TERM &&
+ i == lookahead->len-1 && i >= 1)
+ right_trunc = 1;
+ else
+ mid_trunc = 1;
+ }
+ len += 1+lookahead->len;
lookahead = lookahead->next;
}
- p = mk_node (TERM);
+ p = mk_node (CCL_RPN_TERM);
p->u.t.term = malloc (len);
+ assert (p->u.t.term);
p->u.t.attr_list = NULL;
p->u.t.term[0] = '\0';
- assert (p->u.t.term);
- strxcat (p->u.t.term, look_token->name, look_token->len);
- ADVANCE;
- while (KIND == CCL_TOK_TERM)
+ for (i = 0; i<no; i++)
{
- strcat (p->u.t.term, " ");
- strxcat (p->u.t.term, look_token->name, look_token->len);
- ADVANCE;
+ const char *src_str = look_token->name;
+ int src_len = look_token->len;
+
+ if (i == 0 && left_trunc)
+ {
+ src_len--;
+ src_str++;
+ }
+ else if (i == no-1 && right_trunc)
+ src_len--;
+ if (i)
+ strcat (p->u.t.term, " ");
+ strxcat (p->u.t.term, src_str, src_len);
+ ADVANCE;
}
if (qa)
{
int i;
- /* use ... */
for (i=0; qa[i]; i++)
{
- int j;
- for (j=0; j<qa[i]->nuse; j++)
- add_attr (p, 1, qa[i]->use[j]);
+ struct ccl_rpn_attr *attr;
+
+ for (attr = qa[i]; attr; attr = attr->next)
+ if (attr->value > 0)
+ add_attr (p, attr->type, attr->value);
}
- /* structure ... */
- if (qa[0]->structure == 0)
+ attr = qa[0];
+ }
+ else
+ attr = ccl_qual_search (bibset, "term", 4);
+ if (attr && qual_val_type (attr, CCL_BIB1_STR, CCL_BIB1_STR_WP))
+ {
+ if (no == 1)
+ add_attr (p, CCL_BIB1_STR, 2);
+ else
+ add_attr (p, CCL_BIB1_STR, 1);
+ }
+ if (left_trunc && right_trunc)
+ {
+ if (attr && !qual_val_type (attr, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_BOTH))
{
- if (no == 1)
- add_attr (p, 4, 2);
- else
- add_attr (p, 4, 1);
+ ccl_error = CCL_ERR_TRUNC_NOT_BOTH;
+ if (qa)
+ free (qa);
+ ccl_rpn_delete (p);
+ return NULL;
}
- else if (qa[0]->structure > 0)
- add_attr (p, 4, qa[0]->structure);
+ add_attr (p, CCL_BIB1_TRU, 3);
+ }
+ else if (right_trunc)
+ {
+ if (attr && !qual_val_type (attr, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_RIGHT))
+ {
+ ccl_error = CCL_ERR_TRUNC_NOT_RIGHT;
+ if (qa)
+ free (qa);
+ ccl_rpn_delete (p);
+ return NULL;
+ }
+ add_attr (p, CCL_BIB1_TRU, 1);
+ }
+ else if (left_trunc)
+ {
+ if (attr && !qual_val_type (attr, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_LEFT))
+ {
+ ccl_error = CCL_ERR_TRUNC_NOT_LEFT;
+ if (qa)
+ free (qa);
+ ccl_rpn_delete (p);
+ return NULL;
+ }
+ add_attr (p, CCL_BIB1_TRU, 2);
+ }
+ else
+ {
+ if (attr && qual_val_type (attr, CCL_BIB1_TRU, CCL_BIB1_TRU_CAN_NONE))
+ add_attr (p, CCL_BIB1_TRU, 100);
}
return p;
}
static struct ccl_rpn_node *qualifiers (struct ccl_token *la,
- struct ccl_qualifier **qa)
+ struct ccl_rpn_attr **qa)
{
struct ccl_token *lookahead = look_token;
- struct ccl_qualifier **ap;
+ struct ccl_rpn_attr **ap;
int no = 1;
- int i;
+ int i, rel;
+ struct ccl_rpn_attr *attr;
if (qa)
{
assert (ap);
for (i=0; look_token != la; i++)
{
- ap[i] = ccl_qual_search (bibset, lookahead->name);
+ ap[i] = ccl_qual_search (bibset, look_token->name, look_token->len);
if (!ap[i])
{
ccl_error = CCL_ERR_UNKNOWN_QUAL;
ADVANCE;
}
ap[i] = NULL;
- if (ap[0]->relation != 0)
+ if (! (attr = qual_val (ap[0], CCL_BIB1_REL)) ||
+ attr->value != CCL_BIB1_REL_ORDER)
{
/* unordered relation */
struct ccl_rpn_node *p;
free (ap);
return p;
}
- /* ordered relation ... */
- assert (0);
+ rel = 0;
+ if (look_token->len == 1)
+ {
+ if (look_token->name[0] == '<')
+ rel = 1;
+ else if (look_token->name[0] == '=')
+ rel = 3;
+ else if (look_token->name[0] == '>')
+ rel = 5;
+ }
+ else if (look_token->len == 2)
+ {
+ if (!memcmp (look_token->name, "<=", 2))
+ rel = 2;
+ else if (!memcmp (look_token->name, ">=", 2))
+ rel = 4;
+ else if (!memcmp (look_token->name, "<>", 2))
+ rel = 6;
+ }
+ if (!rel)
+ ccl_error = CCL_ERR_BAD_RELATION;
+ else
+ {
+ struct ccl_rpn_node *p;
+
+ ADVANCE; /* skip relation */
+ if (KIND == CCL_TOK_TERM)
+ {
+ struct ccl_rpn_node *p1;
+ p1 = search_term (ap);
+ if (KIND == CCL_TOK_MINUS)
+ {
+ ADVANCE; /* skip '-' */
+ if (KIND == CCL_TOK_TERM) /* = term - term ? */
+ {
+ struct ccl_rpn_node *p2;
+
+ p2 = search_term (ap);
+ p = mk_node (CCL_RPN_AND);
+ p->u.p[0] = p1;
+ add_attr (p1, CCL_BIB1_REL, 4);
+ p->u.p[1] = p2;
+ add_attr (p2, CCL_BIB1_REL, 2);
+ free (ap);
+ return p;
+ }
+ else /* = term - */
+ {
+ add_attr (p1, CCL_BIB1_REL, 4);
+ free (ap);
+ return p1;
+ }
+ }
+ else
+ {
+ add_attr (p1, CCL_BIB1_REL, rel);
+ free (ap);
+ return p1;
+ }
+ }
+ else if (KIND == CCL_TOK_MINUS) /* = - term ? */
+ {
+ ADVANCE;
+ p = search_term (ap);
+ add_attr (p, CCL_BIB1_REL, 2);
+ free (ap);
+ return p;
+ }
+ ccl_error = CCL_ERR_TERM_EXPECTED;
+ }
free (ap);
return NULL;
}
-static struct ccl_rpn_node *search_terms (struct ccl_qualifier **qa)
+static struct ccl_rpn_node *search_terms (struct ccl_rpn_attr **qa)
{
struct ccl_rpn_node *p1, *p2, *pn;
p1 = search_term (qa);
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (PROX);
+ pn = mk_node (CCL_RPN_PROX);
pn->u.p[0] = p1;
pn->u.p[1] = p2;
p1 = pn;
return p1;
}
-static struct ccl_rpn_node *search_elements (struct ccl_qualifier **qa)
+static struct ccl_rpn_node *search_elements (struct ccl_rpn_attr **qa)
{
struct ccl_rpn_node *p1;
struct ccl_token *lookahead;
else if (KIND == CCL_TOK_SET)
{
ADVANCE;
+ if (KIND == CCL_TOK_EQ)
+ ADVANCE;
if (KIND != CCL_TOK_TERM)
{
ccl_error = CCL_ERR_SETNAME_EXPECTED;
return NULL;
}
- p1 = mk_node (SET);
+ p1 = mk_node (CCL_RPN_SET);
p1->u.setname = copy_token_name (look_token);
ADVANCE;
return p1;
return search_terms (qa);
}
-static struct ccl_rpn_node *find_spec (struct ccl_qualifier **qa)
+static struct ccl_rpn_node *find_spec (struct ccl_rpn_attr **qa)
{
struct ccl_rpn_node *p1, *p2, *pn;
if (!(p1 = search_elements (qa)))
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (AND);
+ pn = mk_node (CCL_RPN_AND);
pn->u.p[0] = p1;
pn->u.p[1] = p2;
p1 = pn;
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (OR);
+ pn = mk_node (CCL_RPN_OR);
pn->u.p[0] = p1;
pn->u.p[1] = p2;
p1 = pn;
ccl_rpn_delete (p1);
return NULL;
}
- pn = mk_node (NOT);
+ pn = mk_node (CCL_RPN_NOT);
pn->u.p[0] = p1;
pn->u.p[1] = p2;
p1 = pn;
return p;
}
-static void pr_tree (struct ccl_rpn_node *rpn)
-{
-
- switch (rpn->kind)
- {
- case TERM:
- printf ("\"%s\"", rpn->u.t.term);
- if (rpn->u.t.attr_list)
- {
- struct ccl_rpn_attr *attr;
- printf ("[ ");
- for (attr = rpn->u.t.attr_list; attr; attr = attr->next)
- printf ("%d=%d ", attr->type, attr->value);
- printf ("] ");
- }
- break;
- case AND:
- printf ("(");
- pr_tree (rpn->u.p[0]);
- printf (") and (");
- pr_tree (rpn->u.p[1]);
- printf (")");
- break;
- case OR:
- printf ("(");
- pr_tree (rpn->u.p[0]);
- printf (") or (");
- pr_tree (rpn->u.p[1]);
- printf (")");
- break;
- case NOT:
- printf ("(");
- pr_tree (rpn->u.p[0]);
- printf (") not (");
- pr_tree (rpn->u.p[1]);
- printf (")");
- break;
- case SET:
- printf ("set=%s", rpn->u.setname);
- break;
- case PROX:
- printf ("(");
- pr_tree (rpn->u.p[0]);
- printf (") prox (");
- pr_tree (rpn->u.p[1]);
- printf (")");
- break;
- default:
- assert (0);
- }
-}
-
struct ccl_rpn_node *ccl_find_str (CCL_bibset bibset, const char *str,
int *error, int *pos)
{
printf ("kind=%d, str='%.*s'\n", li->kind, li->len, li->name);
#endif
rpn = ccl_find (bibset, list, error, &char_pos);
- if (! *error)
- {
- pr_tree (rpn);
- printf ("\n");
- }
- else
- {
+ if (*error)
*pos = char_pos - str;
- }
return rpn;
}
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