+++ /dev/null
-/* $Id: cqltransform.c,v 1.4 2003-02-25 18:08:46 adam Exp $
- Copyright (C) 2002-2003
- Index Data Aps
-
-This file is part of the YAZ toolkit.
-
-See the file LICENSE.
-*/
-
-#include <stdlib.h>
-#include <string.h>
-#include <yaz/cql.h>
-
-struct cql_prop_entry {
- char *pattern;
- char *value;
- struct cql_prop_entry *next;
-};
-
-struct cql_transform_t_ {
- struct cql_prop_entry *entry;
- int error;
- char *addinfo;
-};
-
-cql_transform_t cql_transform_open_FILE(FILE *f)
-{
- char line[1024];
- cql_transform_t ct = (cql_transform_t) malloc (sizeof(*ct));
- struct cql_prop_entry **pp = &ct->entry;
-
- ct->error = 0;
- ct->addinfo = 0;
- while (fgets(line, sizeof(line)-1, f))
- {
- const char *cp_value_start;
- const char *cp_value_end;
- const char *cp_pattern_end;
- const char *cp = line;
- while (*cp && !strchr(" \t=\r\n#", *cp))
- cp++;
- cp_pattern_end = cp;
- if (cp == line)
- continue;
- while (*cp && strchr(" \t\r\n", *cp))
- cp++;
- if (*cp != '=')
- continue;
- cp++;
- while (*cp && strchr(" \t\r\n", *cp))
- cp++;
- cp_value_start = cp;
- if (!(cp_value_end = strchr(cp, '#')))
- cp_value_end = strlen(line) + line;
-
- if (cp_value_end != cp_value_start &&
- strchr(" \t\r\n", cp_value_end[-1]))
- cp_value_end--;
- *pp = (struct cql_prop_entry *) malloc (sizeof(**pp));
- (*pp)->pattern = (char *) malloc (cp_pattern_end - line + 1);
- memcpy ((*pp)->pattern, line, cp_pattern_end - line);
- (*pp)->pattern[cp_pattern_end-line] = 0;
-
- (*pp)->value = (char *) malloc (cp_value_end - cp_value_start + 1);
- if (cp_value_start != cp_value_end)
- memcpy ((*pp)->value, cp_value_start, cp_value_end-cp_value_start);
- (*pp)->value[cp_value_end - cp_value_start] = 0;
- pp = &(*pp)->next;
- }
- *pp = 0;
- return ct;
-}
-
-void cql_transform_close(cql_transform_t ct)
-{
- struct cql_prop_entry *pe;
- if (!ct)
- return;
- pe = ct->entry;
- while (pe)
- {
- struct cql_prop_entry *pe_next = pe->next;
- free (pe->pattern);
- free (pe->value);
- free (pe);
- pe = pe_next;
- }
- if (ct->addinfo)
- free (ct->addinfo);
- free (ct);
-}
-
-cql_transform_t cql_transform_open_fname(const char *fname)
-{
- cql_transform_t ct;
- FILE *f = fopen(fname, "r");
- if (!f)
- return 0;
- ct = cql_transform_open_FILE(f);
- fclose(f);
- return ct;
-}
-
-static const char *cql_lookup_property(cql_transform_t ct,
- const char *pat1, const char *pat2)
-{
- char pattern[80];
- struct cql_prop_entry *e;
-
- if (pat2)
- sprintf (pattern, "%.39s%.39s", pat1, pat2);
- else
- sprintf (pattern, "%.39s", pat1);
- for (e = ct->entry; e; e = e->next)
- {
- if (!strcmp(e->pattern, pattern))
- return e->value;
- }
- return 0;
-}
-
-static const char *cql_lookup_value(cql_transform_t ct,
- const char *prefix,
- const char *value)
-{
- struct cql_prop_entry *e;
- int len = strlen(prefix);
-
- for (e = ct->entry; e; e = e->next)
- {
- if (!memcmp(e->pattern, prefix, len) && !strcmp(e->value, value))
- return e->pattern + len;
- }
- return 0;
-}
-
-
-int cql_pr_attr(cql_transform_t ct, const char *category,
- const char *val,
- const char *default_val,
- void (*pr)(const char *buf, void *client_data),
- void *client_data,
- int errcode)
-{
- const char *res;
- res = cql_lookup_property(ct, category, val ? val : default_val);
- if (!res)
- res = cql_lookup_property(ct, category, "*");
- if (res)
- {
- char buf[64];
-
- const char *cp0 = res, *cp1;
- while ((cp1 = strchr(cp0, '=')))
- {
- while (*cp1 && *cp1 != ' ')
- cp1++;
- if (cp1 - cp0 >= sizeof(buf))
- break;
- memcpy (buf, cp0, cp1 - cp0);
- buf[cp1-cp0] = 0;
- (*pr)("@attr ", client_data);
- (*pr)(buf, client_data);
- (*pr)(" ", client_data);
- cp0 = cp1;
- while (*cp0 == ' ')
- cp0++;
- }
- return 1;
- }
- /* error ... */
- if (errcode && !ct->error)
- {
- ct->error = errcode;
- ct->addinfo = strdup(val);
- }
- return 0;
-}
-
-void emit_term(cql_transform_t ct,
- const char *term, int length,
- void (*pr)(const char *buf, void *client_data),
- void *client_data)
-{
- int i;
- if (length > 0)
- {
- if (length > 1 && term[0] == '^' && term[length-1] == '^')
- {
- cql_pr_attr(ct, "position.", "firstAndLast", 0,
- pr, client_data, 32);
- term++;
- length -= 2;
- }
- else if (term[0] == '^')
- {
- cql_pr_attr(ct, "position.", "first", 0,
- pr, client_data, 32);
- term++;
- }
- else if (term[length-1] == '^')
- {
- cql_pr_attr(ct, "position.", "last", 0,
- pr, client_data, 32);
- length--;
- }
- else
- {
- cql_pr_attr(ct, "position.", "any", 0,
- pr, client_data, 32);
- }
- }
- (*pr)("\"", client_data);
- for (i = 0; i<length; i++)
- {
- char buf[2];
- buf[0] = term[i];
- buf[1] = 0;
- (*pr)(buf, client_data);
- }
- (*pr)("\" ", client_data);
-}
-
-void emit_wordlist(cql_transform_t ct,
- struct cql_node *cn,
- void (*pr)(const char *buf, void *client_data),
- void *client_data,
- const char *op)
-{
- const char *cp0 = cn->u.st.term;
- const char *cp1;
- const char *last_term = 0;
- int last_length = 0;
- while(cp0)
- {
- while (*cp0 == ' ')
- cp0++;
- cp1 = strchr(cp0, ' ');
- if (last_term)
- {
- (*pr)("@", client_data);
- (*pr)(op, client_data);
- (*pr)(" ", client_data);
- emit_term(ct, last_term, last_length, pr, client_data);
- }
- last_term = cp0;
- if (cp1)
- last_length = cp1 - cp0;
- else
- last_length = strlen(cp0);
- cp0 = cp1;
- }
- if (last_term)
- emit_term(ct, last_term, last_length, pr, client_data);
-}
-
-
-static const char *cql_get_ns(cql_transform_t ct,
- struct cql_node *cn,
- struct cql_node **prefix_ar, int prefix_level,
- const char **n_prefix,
- const char **n_suffix)
-{
- int i;
- const char *ns = 0;
- char prefix[32];
- const char *cp = cn->u.st.index;
- const char *cp_dot = strchr(cp, '.');
-
- /* strz current prefix (empty if not given) */
- if (cp_dot && cp_dot-cp < sizeof(prefix))
- {
- memcpy (prefix, cp, cp_dot - cp);
- prefix[cp_dot - cp] = 0;
- }
- else
- *prefix = 0;
-
- /* 2. lookup in prefix_ar. and return NS */
- for (i = prefix_level; !ns && --i >= 0; )
- {
- struct cql_node *cn_prefix = prefix_ar[i];
- for (; cn_prefix; cn_prefix = cn_prefix->u.mod.next)
- {
- if (*prefix && cn_prefix->u.mod.name &&
- !strcmp(prefix, cn_prefix->u.mod.name))
- {
- ns = cn_prefix->u.mod.value;
- break;
- }
- else if (!*prefix && !cn_prefix->u.mod.name)
- {
- ns = cn_prefix->u.mod.value;
- break;
- }
- }
- }
- if (!ns)
- {
- if (!ct->error)
- {
- ct->error = 15;
- ct->addinfo = strdup(prefix);
- }
- return 0;
- }
- /* 3. lookup in set.NS for new prefix */
- *n_prefix = cql_lookup_value(ct, "set.", ns);
- if (!*n_prefix)
- {
- if (!ct->error)
- {
- ct->error = 15;
- ct->addinfo = strdup(ns);
- }
- return 0;
- }
- /* 4. lookup qualifier.prefix. */
-
- cp = cn->u.st.index;
- cp_dot = strchr(cp, '.');
-
- *n_suffix = cp_dot ? cp_dot+1 : cp;
- return ns;
-}
-
-void cql_transform_r(cql_transform_t ct,
- struct cql_node *cn,
- void (*pr)(const char *buf, void *client_data),
- void *client_data,
- struct cql_node **prefix_ar, int prefix_level)
-{
- const char *ns, *n_prefix, *n_suffix;
-
- if (!cn)
- return;
- switch (cn->which)
- {
- case CQL_NODE_ST:
- if (cn->u.st.prefixes && prefix_level < 20)
- prefix_ar[prefix_level++] = cn->u.st.prefixes;
- ns = cql_get_ns(ct, cn, prefix_ar, prefix_level, &n_prefix, &n_suffix);
- if (ns)
- {
- char n_full[64];
- sprintf (n_full, "%.20s.%.40s", n_prefix, n_suffix);
-
- if (!strcmp(ns, "http://www.loc.gov/zing/cql/srw-indexes/v1.0/")
- && !strcmp(n_suffix, "resultSet"))
- {
- (*pr)("@set \"", client_data);
- (*pr)(cn->u.st.term, client_data);
- (*pr)("\" ", client_data);
- return ;
- }
- cql_pr_attr(ct, "qualifier.", n_full, "srw.serverChoice",
- pr, client_data, 16);
- }
-
- if (cn->u.st.relation && !strcmp(cn->u.st.relation, "="))
- cql_pr_attr(ct, "relation.", "eq", "scr",
- pr, client_data, 19);
- else if (cn->u.st.relation && !strcmp(cn->u.st.relation, "<="))
- cql_pr_attr(ct, "relation.", "le", "scr",
- pr, client_data, 19);
- else if (cn->u.st.relation && !strcmp(cn->u.st.relation, ">="))
- cql_pr_attr(ct, "relation.", "ge", "scr",
- pr, client_data, 19);
- else
- cql_pr_attr(ct, "relation.", cn->u.st.relation, "eq",
- pr, client_data, 19);
- if (cn->u.st.modifiers)
- {
- struct cql_node *mod = cn->u.st.modifiers;
- for (; mod; mod = mod->u.mod.next)
- {
- cql_pr_attr(ct, "relationModifier.", mod->u.mod.value, 0,
- pr, client_data, 20);
- }
- }
- cql_pr_attr(ct, "structure.", cn->u.st.relation, 0,
- pr, client_data, 24);
- if (cn->u.st.relation && !strcmp(cn->u.st.relation, "all"))
- {
- emit_wordlist(ct, cn, pr, client_data, "and");
- }
- else if (cn->u.st.relation && !strcmp(cn->u.st.relation, "any"))
- {
- emit_wordlist(ct, cn, pr, client_data, "or");
- }
- else
- {
- emit_term(ct, cn->u.st.term, strlen(cn->u.st.term),
- pr, client_data);
- }
- break;
- case CQL_NODE_BOOL:
- if (cn->u.boolean.prefixes && prefix_level < 20)
- prefix_ar[prefix_level++] = cn->u.boolean.prefixes;
- (*pr)("@", client_data);
- (*pr)(cn->u.boolean.value, client_data);
- (*pr)(" ", client_data);
-
- cql_transform_r(ct, cn->u.boolean.left, pr, client_data,
- prefix_ar, prefix_level);
- cql_transform_r(ct, cn->u.boolean.right, pr, client_data,
- prefix_ar, prefix_level);
- }
-}
-
-int cql_transform(cql_transform_t ct,
- struct cql_node *cn,
- void (*pr)(const char *buf, void *client_data),
- void *client_data)
-{
- struct cql_node *prefix_ar[20], **pp;
- struct cql_prop_entry *e;
-
- ct->error = 0;
- if (ct->addinfo)
- free (ct->addinfo);
- ct->addinfo = 0;
-
- prefix_ar[0] = 0;
- pp = &prefix_ar[0];
- for (e = ct->entry; e ; e = e->next)
- {
- if (!memcmp(e->pattern, "set.", 4))
- {
- *pp = cql_node_mk_mod(e->pattern+4, e->value);
- pp = &(*pp)->u.mod.next;
- }
- else if (!strcmp(e->pattern, "set"))
- {
- *pp = cql_node_mk_mod(0, e->value);
- pp = &(*pp)->u.mod.next;
- }
- }
- cql_transform_r (ct, cn, pr, client_data, prefix_ar, 1);
- cql_node_destroy(prefix_ar[0]);
- return ct->error;
-}
-
-
-int cql_transform_FILE(cql_transform_t ct, struct cql_node *cn, FILE *f)
-{
- return cql_transform(ct, cn, cql_fputs, f);
-}
-
-int cql_transform_buf(cql_transform_t ct, struct cql_node *cn,
- char *out, int max)
-{
- struct cql_buf_write_info info;
- int r;
-
- info.off = 0;
- info.max = max;
- info.buf = out;
- r = cql_transform(ct, cn, cql_buf_write_handler, &info);
- if (info.off >= 0)
- info.buf[info.off] = '\0';
- return r;
-}
-
-int cql_transform_error(cql_transform_t ct, const char **addinfo)
-{
- *addinfo = ct->addinfo;
- return ct->error;
-}
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