+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2013 Index Data
+ * See the file LICENSE for details.
+ */
+
+/**
+ * \file marc_read_json.c
+ * \brief Implements reading of MARC in JSON format
+ */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <yaz/marcdisp.h>
+#include <yaz/json.h>
+#include <yaz/yaz-util.h>
+
+static void parse_subfields(yaz_marc_t mt, struct json_node *sf, WRBUF wtmp)
+{
+ assert(sf->type == json_node_list);
+ for (; sf; sf = sf->u.link[1])
+ {
+ if (sf->u.link[0]->type == json_node_object &&
+ sf->u.link[0]->u.link[0]->type == json_node_list)
+ {
+ struct json_node *se = sf->u.link[0]->u.link[0];
+ for (; se; se = se->u.link[1])
+ {
+ if (se->u.link[0]->type == json_node_pair
+ && se->u.link[0]->u.link[0]->type == json_node_string
+ && se->u.link[0]->u.link[1]->type == json_node_string)
+ {
+ wrbuf_rewind(wtmp);
+ wrbuf_puts(wtmp, se->u.link[0]->u.link[0]->u.string);
+ wrbuf_puts(wtmp, se->u.link[0]->u.link[1]->u.string);
+ yaz_marc_add_subfield(mt, wrbuf_buf(wtmp), wrbuf_len(wtmp));
+ }
+ }
+ }
+ }
+}
+
+static void parse_field(yaz_marc_t mt, struct json_node *p,
+ int indicator_length, WRBUF wtmp)
+{
+ if (p->type == json_node_pair && p->u.link[0]->type == json_node_string)
+ {
+ struct json_node *l = p->u.link[1];
+ if (l->type == json_node_string)
+ {
+ yaz_marc_add_controlfield(mt, p->u.link[0]->u.string,
+ l->u.string, strlen(l->u.string));
+ }
+ else if (l->type == json_node_object &&
+ l->u.link[0]->type == json_node_list)
+ {
+ struct json_node *m;
+ char indicator[10];
+
+ memset(indicator, ' ', sizeof(indicator));
+ for (m = l->u.link[0]; m; m = m->u.link[1])
+ {
+ struct json_node *s = m->u.link[0];
+ if (s->type == json_node_pair)
+ {
+ if (s->u.link[0]->type == json_node_string
+ && !strncmp(s->u.link[0]->u.string, "ind", 3)
+ && s->u.link[1]->type == json_node_string)
+ {
+ int ch = s->u.link[0]->u.string[3];
+ if (ch >= '1' && ch < '9')
+ indicator[ch - '1'] = s->u.link[1]->u.string[0];
+ }
+ }
+ }
+ yaz_marc_add_datafield(mt, p->u.link[0]->u.string,
+ indicator, indicator_length);
+ for (m = l->u.link[0]; m; m = m->u.link[1])
+ {
+ struct json_node *s = m->u.link[0];
+ if (s->type == json_node_pair)
+ {
+ if (s->u.link[0]->type == json_node_string
+ && !strcmp(s->u.link[0]->u.string, "subfields")
+ && s->u.link[1]->type == json_node_array)
+ {
+ parse_subfields(mt, s->u.link[1]->u.link[0], wtmp);
+ }
+ }
+ }
+ }
+ }
+}
+
+int yaz_marc_read_json_node(yaz_marc_t mt, struct json_node *n)
+{
+ if (n && n->type == json_node_object)
+ {
+ int indicator_length;
+ int identifier_length;
+ int base_address;
+ int length_data_entry;
+ int length_starting;
+ int length_implementation;
+ struct json_node *l;
+ WRBUF wtmp = wrbuf_alloc();
+ for (l = n->u.link[0]; l; l = l->u.link[1])
+ {
+ if (l->u.link[0]->type == json_node_pair &&
+ l->u.link[0]->u.link[0]->type == json_node_string)
+ {
+ struct json_node *p = l->u.link[0];
+ if (!strcmp(p->u.link[0]->u.string, "leader") &&
+ p->u.link[1]->type == json_node_string &&
+ strlen(p->u.link[1]->u.string) == 24)
+ {
+ yaz_marc_set_leader(mt, p->u.link[1]->u.string,
+ &indicator_length,
+ &identifier_length,
+ &base_address,
+ &length_data_entry,
+ &length_starting,
+ &length_implementation);
+ }
+ if (!strcmp(p->u.link[0]->u.string, "fields") &&
+ p->u.link[1]->type == json_node_array &&
+ p->u.link[1]->u.link[0] &&
+ p->u.link[1]->u.link[0]->type == json_node_list)
+ {
+ struct json_node *l;
+ for (l = p->u.link[1]->u.link[0]; l; l = l->u.link[1])
+ {
+ if (l->u.link[0]->type == json_node_object)
+ {
+ if (l->u.link[0]->u.link[0] &&
+ l->u.link[0]->u.link[0]->type == json_node_list)
+ {
+ struct json_node *m = l->u.link[0]->u.link[0];
+ for (; m; m = m->u.link[1])
+ parse_field(mt, m->u.link[0],
+ indicator_length, wtmp);
+ }
+ }
+ }
+ }
+ }
+ }
+ wrbuf_destroy(wtmp);
+ return 0;
+ }
+ return -1;
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+
projects / yaz-moved-to-github.git / commitdiff