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Diffstat (limited to 'librdfa/namespace.c')
| -rw-r--r-- | librdfa/namespace.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/librdfa/namespace.c b/librdfa/namespace.c new file mode 100644 index 0000000..06c7f00 --- /dev/null +++ b/librdfa/namespace.c @@ -0,0 +1,140 @@ +/** + * 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 +} |