-/* $Id: d1_absyn.c,v 1.5 2002-12-16 22:59:34 adam Exp $
+/* $Id: d1_absyn.c,v 1.9.2.8 2006-08-14 10:38:51 adam Exp $
Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
Index Data Aps
for more details.
You should have received a copy of the GNU General Public License
-along with Zebra; see the file LICENSE.zebra. If not, write to the
-Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
*/
#include <stdio.h>
#include <yaz/oid.h>
#include <yaz/log.h>
#include <data1.h>
+#include <zebra_xpath.h>
#define D1_MAX_NESTING 128
while (p)
{
data1_absyn *abs = p->absyn;
- data1_xpelement *xpe = abs->xp_elements;
- while (xpe) {
- logf (LOG_DEBUG,"Destroy xp element %s",xpe->xpath_expr);
- if (xpe->dfa) { dfa_delete (&xpe->dfa); }
- xpe = xpe->next;
- }
+ if (abs)
+ {
+ data1_xpelement *xpe = abs->xp_elements;
+ while (xpe) {
+ logf (LOG_DEBUG,"Destroy xp element %s",xpe->xpath_expr);
+ if (xpe->dfa) { dfa_delete (&xpe->dfa); }
+ xpe = xpe->next;
+ }
+ }
p = p->next;
}
}
/ -> none
pop, 2002-12-13
+
+ Now [] predicates are supported
+
+ pop, 2003-01-17
+
*/
-const char * mk_xpath_regexp (data1_handle dh, char *expr)
+static const char * mk_xpath_regexp (data1_handle dh, const char *expr)
{
- char *p = expr;
+ const char *p = expr;
int abs = 1;
- int i;
- int e=0;
-
- static char *stack[32];
- static char res[1024];
- char *r = "";
+ int e = 0;
+ char *stack[32];
+ char *res_p, *res = 0;
+ size_t res_size = 1;
- if (*p != '/') { return (""); }
+ if (*p != '/')
+ return ("");
p++;
- if (*p == '/') { abs=0; p++; }
-
- while (*p) {
- i=0;
- while (*p && !strchr("/",*p)) { i++; p++; }
- stack[e] = (char *) nmem_malloc (data1_nmem_get (dh), i+1);
- memcpy (stack[e], p - i, i);
- stack[e][i] = 0;
+ if (*p == '/')
+ {
+ abs =0;
+ p++;
+ }
+ while (*p)
+ {
+ int is_predicate = 0;
+ char *s;
+ int i, j;
+ for (i = 0; *p && !strchr("/",*p); i++, p++)
+ ;
+ res_size += (i+3); /* we'll add / between later .. */
+ stack[e] = (char *) nmem_malloc(data1_nmem_get(dh), i+1);
+ s = stack[e];
+ for (j = 0; j < i; j++)
+ {
+ const char *pp = p-i+j;
+ if (*pp == '[')
+ is_predicate=1;
+ else if (*pp == ']')
+ is_predicate=0;
+ else
+ {
+ if (!is_predicate) {
+ if (*pp == '*')
+ *s++ = '.';
+ *s++ = *pp;
+ }
+ }
+ }
+ *s = 0;
e++;
- if (*p) {p++;}
+ if (*p)
+ p++;
}
- e--; p = &res[0]; i=0;
- sprintf (p, "^"); p++;
- while (e >= 0) {
- /* !!! res size is not checked !!! */
- sprintf (p, "%s/",stack[e]);
- p += strlen(stack[e]) + 1;
- e--;
+ res_p = res = nmem_malloc(data1_nmem_get(dh), res_size + 10);
+
+ *res_p = '\0';
+ if (stack[e-1][0] == '@') /* path/@attr spec (leaf is attribute) */
+ strcpy(res_p, "/");
+ else
+ strcpy(res_p, "[^@]*/"); /* path .. (index all cdata below it) */
+ res_p = res_p + strlen(res_p);
+ while (--e >= 0) {
+ sprintf(res_p, "%s/", stack[e]);
+ res_p += strlen(stack[e]) + 1;
}
- if (!abs) { sprintf (p, ".*"); p+=2; }
- sprintf (p, "$"); p++;
- r = nmem_strdup (data1_nmem_get (dh), res);
- return (r);
+ if (!abs)
+ {
+ sprintf(res_p, ".*");
+ res_p += 2;
+ }
+ sprintf (res_p, "$");
+ res_p++;
+ yaz_log(LOG_DEBUG, "Got regexp: %s", res);
+ return res;
}
/* *ostrich*
pop, 2002-12-13
*/
static int parse_termlists (data1_handle dh, data1_termlist ***tpp,
- char *p, const char *file, int lineno,
+ char *cp, const char *file, int lineno,
const char *element_name, data1_absyn *res,
int xpelement)
{
data1_termlist **tp = *tpp;
- do
+ while(1)
{
char attname[512], structure[512];
char *source;
- int r;
-
- if (!(r = sscanf(p, "%511[^:,]:%511[^,]", attname,
- structure)))
+ int r, i;
+ int level = 0;
+ structure[0] = '\0';
+ for (i = 0; cp[i] && i<sizeof(attname)-1; i++)
+ if (strchr(":,", cp[i]))
+ break;
+ else
+ attname[i] = cp[i];
+ if (i == 0)
{
- yaz_log(LOG_WARN,
- "%s:%d: Syntax error in termlistspec '%s'",
- file, lineno, p);
- return -1;
+ if (*cp)
+ yaz_log(LOG_WARN,
+ "%s:%d: Syntax error in termlistspec '%s'",
+ file, lineno, cp);
+ break;
}
+ attname[i] = '\0';
+ r = 1;
+ cp += i;
+ if (*cp == ':')
+ cp++;
+
+ for (i = 0; cp[i] && i<sizeof(structure)-1; i++)
+ if (level == 0 && strchr(",", cp[i]))
+ break;
+ else
+ {
+ structure[i] = cp[i];
+ if (cp[i] == '(')
+ level++;
+ else if (cp[i] == ')')
+ level--;
+ }
+ structure[i] = '\0';
+ if (i)
+ r = 2;
+ cp += i;
+ if (*cp)
+ cp++; /* skip , */
*tp = (data1_termlist *)
- nmem_malloc(data1_nmem_get(dh), sizeof(**tp));
+ nmem_malloc(data1_nmem_get(dh), sizeof(**tp));
(*tp)->next = 0;
if (!xpelement) {
nmem_strdup (data1_nmem_get (dh), structure);
tp = &(*tp)->next;
}
- while ((p = strchr(p, ',')) && *(++p));
+
*tpp = tp;
return 0;
}
+/* quinn
+ * Converts a 'melm' field[$subfield] pattern to a simple xpath
+ */
+static int melm2xpath(char *melm, char *buf)
+{
+ char *dollar;
+ char *field = melm;
+ char *subfield;
+ char *fieldtype;
+ if ((dollar = strchr(melm, '$'))) {
+ *dollar = '\0';
+ subfield = ++dollar;
+ } else
+ subfield = "";
+ if (field[0] == '0' && field[1] == '0')
+ fieldtype = "controlfield";
+ else
+ fieldtype = "datafield";
+ sprintf(buf, "/*/%s[@tag=\"%s\"]", fieldtype, field);
+ if (*subfield)
+ sprintf(buf + strlen(buf), "/subfield[@code=\"%s\"]", subfield);
+ else if (field[0] != '0' || field[1] != '0')
+ strcat(buf, "/subfield");
+ yaz_log(LOG_DEBUG, "Created xpath: '%s'", buf);
+ return 0;
+}
+
const char *data1_systag_lookup(data1_absyn *absyn, const char *tag,
const char *default_value)
{
return default_value;
}
+#define l_isspace(c) ((c) == '\t' || (c) == ' ' || (c) == '\n' || (c) == '\r')
+
+int read_absyn_line(FILE *f, int *lineno, char *line, int len,
+ char *argv[], int num)
+{
+ char *p;
+ int argc;
+ int quoted = 0;
+
+ while ((p = fgets(line, len, f)))
+ {
+ (*lineno)++;
+ while (*p && l_isspace(*p))
+ p++;
+ if (*p && *p != '#')
+ break;
+ }
+ if (!p)
+ return 0;
+
+ for (argc = 0; *p ; argc++)
+ {
+ if (*p == '#') /* trailing comment */
+ break;
+ argv[argc] = p;
+ while (*p && !(l_isspace(*p) && !quoted)) {
+ if (*p =='"') quoted = 1 - quoted;
+ if (*p =='[') quoted = 1;
+ if (*p ==']') quoted = 0;
+ p++;
+ }
+ if (*p)
+ {
+ *(p++) = '\0';
+ while (*p && l_isspace(*p))
+ p++;
+ }
+ }
+ return argc;
+}
+
+
data1_absyn *data1_read_absyn (data1_handle dh, const char *file,
int file_must_exist)
{
res->main_elements = NULL;
res->xp_elements = NULL;
- while (f && (argc = readconf_line(f, &lineno, line, 512, argv, 50)))
+ while (f && (argc = read_absyn_line(f, &lineno, line, 512, argv, 50)))
{
char *cmd = *argv;
if (!strcmp(cmd, "elm") || !strcmp(cmd, "element"))
maybe we should use a simple sscanf instead of dfa?
pop, 2002-12-13
+
+ Now [] predicates are supported. regexps and xpath structure is
+ a bit redundant, however it's comfortable later...
+
+ pop, 2003-01-17
*/
- else if (!strcmp(cmd, "xelm")) {
+ else if (!strcmp(cmd, "xelm") || !strcmp(cmd, "melm")) {
int i;
char *p, *xpath_expr, *termlists;
const char *regexp;
- int type, value;
struct DFA *dfa = dfa = dfa_init();
data1_termlist **tp;
+ char melm_xpath[128];
if (argc < 3)
{
yaz_log(LOG_WARN, "%s:%d: Bad # of args to xelm", file, lineno);
continue;
}
- xpath_expr = argv[1];
+
+ if (!strcmp(cmd, "melm")) {
+ if (melm2xpath(argv[1], melm_xpath) < 0)
+ continue;
+ xpath_expr = melm_xpath;
+ } else {
+ xpath_expr = argv[1];
+ }
termlists = argv[2];
regexp = mk_xpath_regexp(dh, xpath_expr);
i = dfa_parse (dfa, ®exp);
dfa_mkstate (dfa);
cur_xpelement->dfa = dfa;
+
+#ifdef ENHANCED_XELM
+ cur_xpelement->xpath_len =
+ zebra_parse_xpath_str(xpath_expr,
+ cur_xpelement->xpath, XPATH_STEP_COUNT,
+ data1_nmem_get(dh));
+ /*
+ dump_xp_steps(cur_xpelement->xpath,cur_xpelement->xpath_len);
+ */
+#endif
cur_xpelement->termlists = 0;
tp = &cur_xpelement->termlists;
}
else if (!strcmp(cmd, "systag"))
{
- struct data1_systag *st;
if (argc != 3)
{
yaz_log(LOG_WARN, "%s:%d: Bad # or args for systag",
projects / idzebra-moved-to-github.git / blobdiff