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/**
* Copyright 2008-2011 Digital Bazaar, Inc.
*
* This file is part of librdfa.
*
* librdfa is Free Software, and can be licensed under any of the
* following three licenses:
*
* 1. GNU Lesser General Public License (LGPL) V2.1 or any
* newer version
* 2. GNU General Public License (GPL) V2 or any newer version
* 3. Apache License, V2.0 or any newer version
*
* You may not use this file except in compliance with at least one of
* the above three licenses.
*
* See LICENSE-* at the top of this software distribution for more
* information regarding the details of each license.
*
* This file implements mapping data structure memory management as
* well as updating URI mappings.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "rdfa_utils.h"
#include "rdfa.h"
/**
* Attempts to update the uri mappings in the given context using the
* given attribute/value pair.
*
* @param attribute the attribute, which must start with xmlns.
* @param value the value of the attribute
*/
void rdfa_update_uri_mappings(
rdfacontext* context, const char* attr, const char* value)
{
#ifdef LIBRDFA_IN_RAPTOR
raptor_namespace_stack* nstack;
nstack = &context->sax2->namespaces;
#endif
/* * the [current element] is parsed for [URI mappings] and these
* are added to the [list of URI mappings]. Note that a [URI
* mapping] will simply overwrite any current mapping in the list
* that has the same name; */
/* Mappings are provided by @xmlns. The value to be mapped is set
* by the XML namespace prefix, and the value to map is the value
* of the attribute -- a URI. Note that the URI is not processed
* in any way; in particular if it is a relative path it is not
* resolved against the [current base]. Authors are advised to
* follow best practice for using namespaces, which includes not
* using relative paths. */
if(attr == NULL)
{
#ifdef LIBRDFA_IN_RAPTOR
raptor_namespaces_start_namespace_full(nstack,
NULL,
(const unsigned char*)value,
0);
#else
rdfa_update_mapping(
context->uri_mappings, XMLNS_DEFAULT_MAPPING, value,
(update_mapping_value_fp)rdfa_replace_string);
#endif
}
else if(strcmp(attr, "_") == 0)
{
#define FORMAT_1 "The underscore character must not be declared as a prefix " \
"because it conflicts with the prefix for blank node identifiers. " \
"The occurrence of this prefix declaration is being ignored."
#ifdef LIBRDFA_IN_RAPTOR
raptor_parser_warning((raptor_parser*)context->callback_data,
FORMAT_1);
#else
rdfa_processor_triples(context,
RDFA_PROCESSOR_WARNING,
FORMAT_1);
#endif
}
else if(attr[0] == ':' || attr[0] == '_' ||
(attr[0] >= 'A' && attr[0] <= 'Z') ||
(attr[0] >= 'a' && attr[0] <= 'z') ||
((unsigned char)attr[0] >= 0xc0 && (unsigned char)attr[0] <= 0xd6) ||
((unsigned char)attr[0] >= 0xd8 && (unsigned char)attr[0] <= 0xf6) || (unsigned char)attr[0] >= 0xf8)
{
#ifdef LIBRDFA_IN_RAPTOR
raptor_namespaces_start_namespace_full(nstack,
(const unsigned char*)attr,
(const unsigned char*)value,
0);
#else
rdfa_generate_namespace_triple(context, attr, value);
rdfa_update_mapping(context->uri_mappings, attr, value,
(update_mapping_value_fp)rdfa_replace_string);
#endif
}
else
{
/* allowable characters for CURIEs:
* ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] |
* [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] |
* [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD]
* | [#x10000-#xEFFFF]
*/
/* Generate the processor warning if this is an invalid prefix */
#define FORMAT_2 "The declaration of the '%s' prefix is invalid " \
"because it starts with an invalid character. Please see " \
"http://www.w3.org/TR/REC-xml/#NT-NameStartChar for a " \
"full explanation of valid first characters for declaring " \
"prefixes."
#ifdef LIBRDFA_IN_RAPTOR
raptor_parser_warning((raptor_parser*)context->callback_data,
FORMAT_2, attr);
#else
char msg[1024];
snprintf(msg, 1024, FORMAT_1);
rdfa_processor_triples(context, RDFA_PROCESSOR_WARNING, msg);
#endif
}
#ifdef LIBRDFA_IN_RAPTOR
#else
/* print the current mapping */
if(DEBUG)
{
printf("DEBUG: PREFIX MAPPINGS:");
rdfa_print_mapping(context->uri_mappings,
(print_mapping_value_fp)rdfa_print_string);
}
#endif
}
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