Refactor yaz_match-routines to separate source

[yaz-moved-to-github.git] / src / xml_match.c

diff --git a/src/xml_match.c b/src/xml_match.c
new file mode 100644 (file)
index 0000000..ab0e4b1
--- /dev/null
+++ b/src/xml_match.c
@@ -0,0 +1,171 @@
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2013 Index Data
+ * See the file LICENSE for details.
+ */
+/**
+ * \file xml_match.c
+ * \brief XML node inspection utilities
+ */
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+
+#include <yaz/srw.h>
+#include <yaz/wrbuf.h>
+#if YAZ_HAVE_XML2
+#include <libxml/parser.h>
+#include <libxml/tree.h>
+#include "sru-p.h"
+
+int yaz_match_xsd_element(xmlNodePtr ptr, const char *elem)
+{
+    if (ptr->type == XML_ELEMENT_NODE && !xmlStrcmp(ptr->name, BAD_CAST elem))
+    {
+        return 1;
+    }
+    return 0;
+}
+
+#define CHECK_TYPE 0
+
+int yaz_match_xsd_string_n(xmlNodePtr ptr, const char *elem, ODR o,
+                           char **val, int *len)
+{
+#if CHECK_TYPE
+    struct _xmlAttr *attr;
+#endif
+    if (!yaz_match_xsd_element(ptr, elem))
+        return 0;
+#if CHECK_TYPE
+    for (attr = ptr->properties; attr; attr = attr->next)
+        if (!strcmp(attr->name, "type") &&
+            attr->children && attr->children->type == XML_TEXT_NODE)
+        {
+            const char *t = strchr(attr->children->content, ':');
+            if (t)
+                t = t + 1;
+            else
+                t = attr->children->content;
+            if (!strcmp(t, "string"))
+                break;
+        }
+    if (!attr)
+        return 0;
+#endif
+    ptr = ptr->children;
+    if (!ptr || ptr->type != XML_TEXT_NODE)
+    {
+        *val = "";
+        return 1;
+    }
+    *val = odr_strdup(o, (const char *) ptr->content);
+    if (len)
+        *len = xmlStrlen(ptr->content);
+    return 1;
+}
+
+
+int yaz_match_xsd_string(xmlNodePtr ptr, const char *elem, ODR o, char **val)
+{
+    return yaz_match_xsd_string_n(ptr, elem, o, val, 0);
+}
+
+int yaz_match_xsd_XML_n2(xmlNodePtr ptr, const char *elem, ODR o,
+                         char **val, int *len, int fixup_root)
+{
+    xmlBufferPtr buf;
+    int no_root_nodes = 0;
+
+    if (!yaz_match_xsd_element(ptr, elem))
+        return 0;
+
+    buf = xmlBufferCreate();
+
+    /* Copy each element nodes at top.
+       In most cases there is only one root node.. At least one server
+       http://www.theeuropeanlibrary.org/sru/sru.pl
+       has multiple root nodes in recordData.
+    */
+    for (ptr = ptr->children; ptr; ptr = ptr->next)
+    {
+        if (ptr->type == XML_ELEMENT_NODE)
+        {
+            /* copy node to get NS right (bug #740). */
+            xmlNode *tmp = xmlCopyNode(ptr, 1);
+
+            xmlNodeDump(buf, tmp->doc, tmp, 0, 0);
+
+            xmlFreeNode(tmp);
+            no_root_nodes++;
+        }
+    }
+    if (no_root_nodes != 1 && fixup_root)
+    {
+        /* does not appear to be an XML document. Make it so */
+        xmlBufferAddHead(buf, (const xmlChar *) "<yaz_record>", -1);
+        xmlBufferAdd(buf, (const xmlChar *) "</yaz_record>", -1);
+    }
+    *val = (char *) odr_malloc(o, buf->use + 1);
+    memcpy(*val, buf->content, buf->use);
+    (*val)[buf->use] = '\0';
+
+    if (len)
+        *len = buf->use;
+
+    xmlBufferFree(buf);
+
+    return 1;
+}
+
+int yaz_match_xsd_XML_n(xmlNodePtr ptr, const char *elem, ODR o,
+                        char **val, int *len)
+{
+    return yaz_match_xsd_XML_n2(ptr, elem, o, val, len, 0);
+}
+
+int yaz_match_xsd_integer(xmlNodePtr ptr, const char *elem, ODR o,
+                          Odr_int **val)
+{
+#if CHECK_TYPE
+    struct _xmlAttr *attr;
+#endif
+    if (!yaz_match_xsd_element(ptr, elem))
+        return 0;
+#if CHECK_TYPE
+    for (attr = ptr->properties; attr; attr = attr->next)
+        if (!strcmp(attr->name, "type") &&
+            attr->children && attr->children->type == XML_TEXT_NODE)
+        {
+            const char *t = strchr(attr->children->content, ':');
+            if (t)
+                t = t + 1;
+            else
+                t = attr->children->content;
+            if (!strcmp(t, "integer"))
+                break;
+        }
+    if (!attr)
+        return 0;
+#endif
+    ptr = ptr->children;
+    if (!ptr || ptr->type != XML_TEXT_NODE)
+        return 0;
+    *val = odr_intdup(o, odr_atoi((const char *) ptr->content));
+    return 1;
+}
+
+
+#endif
+
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+