2 This file is part of GNUnet.
3 (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 2, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file util/container_meta_data.c
23 * @brief Storing of meta data
24 * @author Christian Grothoff
28 #include "gnunet_common.h"
29 #include "gnunet_container_lib.h"
30 #include "gnunet_strings_lib.h"
31 #include "gnunet_time_lib.h"
32 #include <extractor.h>
41 * This is a linked list.
43 struct MetaItem *next;
46 * Name of the extracting plugin.
56 * The actual meta data.
61 * Number of bytes in 'data'.
66 * Type of the meta data.
68 enum EXTRACTOR_MetaType type;
71 * Format of the meta data.
73 enum EXTRACTOR_MetaFormat format;
78 * Meta data to associate with a file, directory or namespace.
80 struct GNUNET_CONTAINER_MetaData
83 * Linked list of the meta data items.
85 struct MetaItem *items;
88 * Complete serialized and compressed buffer of the items.
89 * NULL if we have not computed that buffer yet.
94 * Number of bytes in 'sbuf'. 0 if the buffer is stale.
99 * Number of items in the linked list.
101 unsigned int item_count;
107 * Create a fresh struct CONTAINER_MetaData token.
109 * @return empty meta-data container
111 struct GNUNET_CONTAINER_MetaData *
112 GNUNET_CONTAINER_meta_data_create ()
114 return GNUNET_malloc (sizeof (struct GNUNET_CONTAINER_MetaData));
119 * Free meta data item.
121 * @param item item to free
124 meta_item_free (struct MetaItem *item)
126 GNUNET_free_non_null (item->plugin_name);
127 GNUNET_free_non_null (item->mime_type);
128 GNUNET_free_non_null (item->data);
134 * The meta data has changed, invalidate its serialization
137 * @param md meta data that changed
140 invalidate_sbuf (struct GNUNET_CONTAINER_MetaData *md)
142 if (md->sbuf == NULL)
144 GNUNET_free (md->sbuf);
153 * @param md what to free
156 GNUNET_CONTAINER_meta_data_destroy (struct GNUNET_CONTAINER_MetaData *md)
158 struct MetaItem *item;
162 while (NULL != (item = md->items))
164 md->items = item->next;
165 meta_item_free (item);
167 GNUNET_free_non_null (md->sbuf);
173 * Remove all items in the container.
175 * @param md metadata to manipulate
178 GNUNET_CONTAINER_meta_data_clear (struct GNUNET_CONTAINER_MetaData *md)
180 struct MetaItem *item;
184 while (NULL != (item = md->items))
186 md->items = item->next;
187 meta_item_free (item);
189 GNUNET_free_non_null (md->sbuf);
190 memset (md, 0, sizeof (struct GNUNET_CONTAINER_MetaData));
196 * Test if two MDs are equal. We consider them equal if
197 * the meta types, formats and content match (we do not
198 * include the mime types and plugins names in this
201 * @param md1 first value to check
202 * @param md2 other value to check
203 * @return GNUNET_YES if they are equal
206 GNUNET_CONTAINER_meta_data_test_equal (const struct GNUNET_CONTAINER_MetaData
208 const struct GNUNET_CONTAINER_MetaData
217 if (md1->item_count != md2->item_count)
227 if ( (i->type == j->type) &&
228 (i->format == j->format) &&
229 (i->data_size == j->data_size) &&
230 (0 == memcmp (i->data,
239 if (found == GNUNET_NO)
248 * Extend metadata. Note that the list of meta data items is
249 * sorted by size (largest first).
251 * @param md metadata to extend
252 * @param plugin_name name of the plugin that produced this value;
253 * special values can be used (i.e. '<zlib>' for zlib being
254 * used in the main libextractor library and yielding
256 * @param type libextractor-type describing the meta data
257 * @param format basic format information about data
258 * @param data_mime_type mime-type of data (not of the original file);
259 * can be NULL (if mime-type is not known)
260 * @param data actual meta-data found
261 * @param data_len number of bytes in data
262 * @return GNUNET_OK on success, GNUNET_SYSERR if this entry already exists
263 * data_mime_type and plugin_name are not considered for "exists" checks
266 GNUNET_CONTAINER_meta_data_insert (struct GNUNET_CONTAINER_MetaData *md,
267 const char *plugin_name,
268 enum EXTRACTOR_MetaType type,
269 enum EXTRACTOR_MetaFormat format,
270 const char *data_mime_type,
274 struct MetaItem *prev;
275 struct MetaItem *pos;
283 if (pos->data_size < data_len)
285 if ( (pos->type == type) &&
286 (pos->format == format) &&
287 (pos->data_size == data_len) &&
288 (0 == memcmp (pos->data,
292 if ( (pos->mime_type == NULL) &&
293 (data_mime_type != NULL) )
295 pos->mime_type = GNUNET_strdup (data_mime_type);
296 invalidate_sbuf (md);
298 return GNUNET_SYSERR;
304 i = GNUNET_malloc (sizeof (struct MetaItem));
307 i->data_size = data_len;
313 i->mime_type = (data_mime_type == NULL) ? NULL : GNUNET_strdup (data_mime_type);
314 i->plugin_name = (plugin_name == NULL) ? NULL : GNUNET_strdup (plugin_name);
315 i->data = GNUNET_malloc (data_len);
316 memcpy (i->data, data, data_len);
317 /* change OS native dir separators to unix '/' and others to '_' */
318 if (type == EXTRACTOR_METATYPE_FILENAME)
321 while ( (*p != '\0') &&
322 (p < i->data + data_len) )
324 if (*p == DIR_SEPARATOR)
331 invalidate_sbuf (md);
337 * Merge given meta data.
339 * @param cls the 'struct GNUNET_CONTAINER_MetaData' to merge into
340 * @param plugin_name name of the plugin that produced this value;
341 * special values can be used (i.e. '<zlib>' for zlib being
342 * used in the main libextractor library and yielding
344 * @param type libextractor-type describing the meta data
345 * @param format basic format information about data
346 * @param data_mime_type mime-type of data (not of the original file);
347 * can be NULL (if mime-type is not known)
348 * @param data actual meta-data found
349 * @param data_len number of bytes in data
350 * @return 0 (to continue)
353 merge_helper(void *cls,
354 const char *plugin_name,
355 enum EXTRACTOR_MetaType type,
356 enum EXTRACTOR_MetaFormat format,
357 const char *data_mime_type,
361 struct GNUNET_CONTAINER_MetaData *md = cls;
362 (void) GNUNET_CONTAINER_meta_data_insert (md, plugin_name,
364 data_mime_type, data, data_len);
370 * Extend metadata. Merges the meta data from the second argument
371 * into the first, discarding duplicate key-value pairs.
373 * @param md metadata to extend
374 * @param in metadata to merge
377 GNUNET_CONTAINER_meta_data_merge (struct GNUNET_CONTAINER_MetaData *md,
378 const struct GNUNET_CONTAINER_MetaData *in)
380 GNUNET_CONTAINER_meta_data_iterate (in, &merge_helper, md);
387 * @param md metadata to manipulate
388 * @param type type of the item to remove
389 * @param data specific value to remove, NULL to remove all
390 * entries of the given type
391 * @param data_len number of bytes in data
392 * @return GNUNET_OK on success, GNUNET_SYSERR if the item does not exist in md
395 GNUNET_CONTAINER_meta_data_delete (struct GNUNET_CONTAINER_MetaData *md,
396 enum EXTRACTOR_MetaType type,
400 struct MetaItem *pos;
401 struct MetaItem *prev;
407 if ( (pos->type == type) &&
409 ( (pos->data_size == data_len) &&
410 (0 == memcmp (pos->data,
415 md->items = pos->next;
417 prev->next = pos->next;
418 meta_item_free (pos);
420 invalidate_sbuf (md);
426 return GNUNET_SYSERR;
431 * Add the current time as the publication date
434 * @param md metadata to modify
437 GNUNET_CONTAINER_meta_data_add_publication_date (struct
438 GNUNET_CONTAINER_MetaData
442 struct GNUNET_TIME_Absolute t;
444 t = GNUNET_TIME_absolute_get ();
445 GNUNET_CONTAINER_meta_data_delete (md,
446 EXTRACTOR_METATYPE_PUBLICATION_DATE,
449 dat = GNUNET_STRINGS_absolute_time_to_string (t);
450 GNUNET_CONTAINER_meta_data_insert (md,
452 EXTRACTOR_METATYPE_PUBLICATION_DATE,
453 EXTRACTOR_METAFORMAT_UTF8,
462 * Iterate over MD entries.
464 * @param md metadata to inspect
465 * @param iter function to call on each entry
466 * @param iter_cls closure for iterator
467 * @return number of entries
470 GNUNET_CONTAINER_meta_data_iterate (const struct
471 GNUNET_CONTAINER_MetaData *md,
472 EXTRACTOR_MetaDataProcessor
473 iter, void *iter_cls)
475 struct MetaItem *pos;
480 return md->item_count;
484 if (0 != iter (iter_cls,
491 return md->item_count;
494 return md->item_count;
499 * Get the first MD entry of the given type. Caller
500 * is responsible for freeing the return value.
501 * Also, only meta data items that are strings (0-terminated)
502 * are returned by this function.
504 * @param md metadata to inspect
505 * @param type type to look for
506 * @return NULL if no entry was found
509 GNUNET_CONTAINER_meta_data_get_by_type (const struct GNUNET_CONTAINER_MetaData
510 *md, enum EXTRACTOR_MetaType type)
512 struct MetaItem *pos;
519 if ( (type == pos->type) &&
520 ( (pos->format == EXTRACTOR_METAFORMAT_UTF8) ||
521 (pos->format == EXTRACTOR_METAFORMAT_C_STRING) ) )
522 return GNUNET_strdup (pos->data);
530 * Get the first matching MD entry of the given types. Caller is
531 * responsible for freeing the return value. Also, only meta data
532 * items that are strings (0-terminated) are returned by this
535 * @param md metadata to inspect
536 * @param ... -1-terminated list of types
537 * @return NULL if we do not have any such entry,
538 * otherwise client is responsible for freeing the value!
541 GNUNET_CONTAINER_meta_data_get_first_by_types (const struct
542 GNUNET_CONTAINER_MetaData *md,
547 enum EXTRACTOR_MetaType type;
555 type = va_arg (args, enum EXTRACTOR_MetaType);
558 ret = GNUNET_CONTAINER_meta_data_get_by_type (md, type);
568 * Get a thumbnail from the meta-data (if present).
570 * @param md metadata to get the thumbnail from
571 * @param thumb will be set to the thumbnail data. Must be
572 * freed by the caller!
573 * @return number of bytes in thumbnail, 0 if not available
576 GNUNET_CONTAINER_meta_data_get_thumbnail (const struct
577 GNUNET_CONTAINER_MetaData * md,
578 unsigned char **thumb)
580 struct MetaItem *pos;
581 struct MetaItem *match;
589 if ( (NULL != pos->mime_type) &&
590 (0 == strncasecmp ("image/", pos->mime_type,
591 strlen("image/"))) &&
592 (pos->format == EXTRACTOR_METAFORMAT_BINARY) )
596 else if ( (match->type != EXTRACTOR_METATYPE_THUMBNAIL) &&
597 (pos->type == EXTRACTOR_METATYPE_THUMBNAIL) )
602 if ( (match == NULL) ||
603 (match->data_size == 0) )
605 *thumb = GNUNET_malloc (match->data_size);
606 memcpy (*thumb, match->data, match->data_size);
607 return match->data_size;
612 * Duplicate struct GNUNET_CONTAINER_MetaData.
614 * @param md what to duplicate
615 * @return duplicate meta-data container
617 struct GNUNET_CONTAINER_MetaData *
618 GNUNET_CONTAINER_meta_data_duplicate (const struct GNUNET_CONTAINER_MetaData
621 struct GNUNET_CONTAINER_MetaData *ret;
622 struct MetaItem *pos;
626 ret = GNUNET_CONTAINER_meta_data_create ();
630 GNUNET_CONTAINER_meta_data_insert (ret,
645 * Try to compress the given block of data.
647 * @param data block to compress; if compression
648 * resulted in a smaller block, the first
649 * bytes of data are updated to the compressed
651 * @param oldSize number of bytes in data
652 * @param result set to the compressed data
653 * @param newSize set to size of result
654 * @return GNUNET_YES if compression reduce the size,
655 * GNUNET_NO if compression did not help
658 try_compression (const char *data,
667 dlen = compressBound (oldSize);
669 dlen = oldSize + (oldSize / 100) + 20;
670 /* documentation says 100.1% oldSize + 12 bytes, but we
671 should be able to overshoot by more to be safe */
673 tmp = GNUNET_malloc (dlen);
674 if (Z_OK == compress2 ((Bytef *) tmp,
675 &dlen, (const Bytef *) data, oldSize, 9))
690 * Flag in 'version' that indicates compressed meta-data.
692 #define HEADER_COMPRESSED 0x80000000
696 * Bits in 'version' that give the version number.
698 #define HEADER_VERSION_MASK 0x7FFFFFFF
702 * Header for serialized meta data.
704 struct MetaDataHeader
707 * The version of the MD serialization. The highest bit is used to
708 * indicate compression.
710 * Version 0 is traditional (pre-0.9) meta data (unsupported)
711 * Version is 1 for a NULL pointer
712 * Version 2 is for 0.9.x (and possibly higher)
713 * Other version numbers are not yet defined.
718 * How many MD entries are there?
723 * Size of the decompressed meta data.
728 * This is followed by 'entries' values of type 'struct MetaDataEntry'
729 * and then by 'entry' plugin names, mime-types and data blocks
730 * as specified in those meta data entries.
736 * Entry of serialized meta data.
741 * Meta data type. Corresponds to an 'enum EXTRACTOR_MetaType'
746 * Meta data format. Corresponds to an 'enum EXTRACTOR_MetaFormat'
751 * Number of bytes of meta data.
756 * Number of bytes in the plugin name including 0-terminator. 0 for NULL.
758 uint32_t plugin_name_len;
761 * Number of bytes in the mime type including 0-terminator. 0 for NULL.
763 uint32_t mime_type_len;
769 * Serialize meta-data to target.
771 * @param md metadata to serialize
772 * @param target where to write the serialized metadata;
773 * *target can be NULL, in which case memory is allocated
774 * @param max maximum number of bytes available in target
775 * @param opt is it ok to just write SOME of the
776 * meta-data to match the size constraint,
777 * possibly discarding some data?
778 * @return number of bytes written on success,
779 * GNUNET_SYSERR on error (typically: not enough
783 GNUNET_CONTAINER_meta_data_serialize (const struct GNUNET_CONTAINER_MetaData
784 *md, char **target, size_t max,
786 GNUNET_CONTAINER_MetaDataSerializationOptions
789 struct GNUNET_CONTAINER_MetaData *vmd;
790 struct MetaItem *pos;
791 struct MetaDataHeader ihdr;
792 struct MetaDataHeader *hdr;
793 struct MetaDataEntry *ent;
808 if (max < sizeof (struct MetaDataHeader))
809 return GNUNET_SYSERR; /* far too small */
813 if (md->sbuf != NULL)
815 /* try to use serialization cache */
816 if (md->sbuf_size <= max)
819 *target = GNUNET_malloc (md->sbuf_size);
823 return md->sbuf_size;
825 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_PART))
826 return GNUNET_SYSERR; /* can say that this will fail */
827 /* need to compute a partial serialization, sbuf useless ... */
834 msize += sizeof (struct MetaDataEntry);
835 msize += pos->data_size;
836 if (pos->plugin_name != NULL)
837 msize += strlen (pos->plugin_name) + 1;
838 if (pos->mime_type != NULL)
839 msize += strlen (pos->mime_type) + 1;
842 size = (size_t) msize;
845 GNUNET_break (0); /* integer overflow */
846 return GNUNET_SYSERR;
848 if (size >= GNUNET_MAX_MALLOC_CHECKED)
850 /* too large to be processed */
851 return GNUNET_SYSERR;
853 ent = GNUNET_malloc (size);
854 mdata = (char *) &ent[md->item_count];
855 off = size - (md->item_count * sizeof(struct MetaDataEntry));
860 ent[i].type = htonl ((uint32_t) pos->type);
861 ent[i].format = htonl ((uint32_t) pos->format);
862 ent[i].data_size = htonl ((uint32_t) pos->data_size);
863 if (pos->plugin_name == NULL)
866 plen = strlen (pos->plugin_name) + 1;
867 ent[i].plugin_name_len = htonl ( (uint32_t) plen);
868 if (pos->mime_type == NULL)
871 mlen = strlen (pos->mime_type) + 1;
872 ent[i].mime_type_len = htonl ((uint32_t) mlen);
873 off -= pos->data_size;
874 memcpy (&mdata[off], pos->data, pos->data_size);
876 if (pos->plugin_name != NULL)
877 memcpy (&mdata[off], pos->plugin_name, plen);
879 if (pos->mime_type != NULL)
880 memcpy (&mdata[off], pos->mime_type, mlen);
884 GNUNET_assert (off == 0);
894 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_NO_COMPRESS))
895 comp = try_compression ((const char*) &ent[i],
900 if ( (md->sbuf == NULL) &&
903 /* fill 'sbuf'; this "modifies" md, but since this is only
904 an internal cache we will cast away the 'const' instead
905 of making the API look strange. */
906 vmd = (struct GNUNET_CONTAINER_MetaData*) md;
907 hdr = GNUNET_malloc (left + sizeof (struct MetaDataHeader));
908 hdr->size = htonl (left);
909 hdr->entries = htonl (md->item_count);
910 if (GNUNET_YES == comp)
912 GNUNET_assert (clen < left);
913 hdr->version = htonl (2 | HEADER_COMPRESSED);
917 vmd->sbuf_size = clen + sizeof (struct MetaDataHeader);
921 hdr->version = htonl (2);
925 vmd->sbuf_size = left + sizeof (struct MetaDataHeader);
927 vmd->sbuf = (char*) hdr;
930 if ( ( (left + sizeof (struct MetaDataHeader)) <= max) ||
931 ( (comp == GNUNET_YES) &&
934 /* success, this now fits! */
935 if (GNUNET_YES == comp)
938 dst = GNUNET_malloc (clen + sizeof (struct MetaDataHeader));
939 hdr = (struct MetaDataHeader*) dst;
940 hdr->version = htonl (2 | HEADER_COMPRESSED);
941 hdr->size = htonl (left);
942 hdr->entries = htonl (md->item_count - i);
943 memcpy (&dst[sizeof(struct MetaDataHeader)],
948 rlen = clen + sizeof (struct MetaDataHeader);
953 dst = GNUNET_malloc (left + sizeof (struct MetaDataHeader));
954 hdr = (struct MetaDataHeader*) dst;
955 hdr->version = htonl (2);
956 hdr->entries = htonl (md->item_count - i);
957 hdr->size = htonl (left);
958 memcpy (&dst[sizeof(struct MetaDataHeader)],
962 rlen = left + sizeof (struct MetaDataHeader);
966 memcpy (*target, dst, clen + sizeof (struct MetaDataHeader));
976 if (0 == (opt & GNUNET_CONTAINER_META_DATA_SERIALIZE_PART))
980 return GNUNET_SYSERR;
983 /* next iteration: ignore the corresponding meta data at the
984 end and try again without it */
985 left -= sizeof (struct MetaDataEntry);
986 left -= pos->data_size;
987 if (pos->plugin_name != NULL)
988 left -= strlen (pos->plugin_name) + 1;
989 if (pos->mime_type != NULL)
990 left -= strlen (pos->mime_type) + 1;
996 /* nothing fit, only write header! */
997 ihdr.version = htonl (2);
998 ihdr.entries = htonl (0);
999 ihdr.size = htonl (0);
1000 if (*target == NULL)
1001 *target = GNUNET_malloc (sizeof (struct MetaDataHeader));
1002 memcpy (*target, &ihdr, sizeof (struct MetaDataHeader));
1003 return sizeof (struct MetaDataHeader);
1008 * Get the size of the full meta-data in serialized form.
1010 * @param md metadata to inspect
1011 * @return number of bytes needed for serialization, -1 on error
1014 GNUNET_CONTAINER_meta_data_get_serialized_size (const struct GNUNET_CONTAINER_MetaData *md)
1019 if (md->sbuf != NULL)
1020 return md->sbuf_size;
1022 ret = GNUNET_CONTAINER_meta_data_serialize (md,
1024 GNUNET_MAX_MALLOC_CHECKED,
1025 GNUNET_CONTAINER_META_DATA_SERIALIZE_FULL);
1033 * Decompress input, return the decompressed data
1034 * as output, set outputSize to the number of bytes
1037 * @param input compressed data
1038 * @param inputSize number of bytes in input
1039 * @param outputSize expected size of the output
1040 * @return NULL on error
1043 decompress (const char *input,
1051 output = GNUNET_malloc (olen);
1052 if (Z_OK == uncompress ((Bytef *) output,
1053 &olen, (const Bytef *) input, inputSize))
1059 GNUNET_free (output);
1066 * Deserialize meta-data. Initializes md.
1068 * @param input buffer with the serialized metadata
1069 * @param size number of bytes available in input
1070 * @return MD on success, NULL on error (i.e.
1073 struct GNUNET_CONTAINER_MetaData *
1074 GNUNET_CONTAINER_meta_data_deserialize (const char *input, size_t size)
1076 struct GNUNET_CONTAINER_MetaData *md;
1077 struct MetaDataHeader hdr;
1078 struct MetaDataEntry ent;
1091 const char *meta_data;
1092 const char *plugin_name;
1093 const char *mime_type;
1094 enum EXTRACTOR_MetaFormat format;
1096 if (size < sizeof (struct MetaDataHeader))
1100 sizeof (struct MetaDataHeader));
1101 version = ntohl (hdr.version) & HEADER_VERSION_MASK;
1102 compressed = (ntohl (hdr.version) & HEADER_COMPRESSED) != 0;
1105 return NULL; /* null pointer */
1108 GNUNET_break_op (0); /* unsupported version */
1112 ic = ntohl (hdr.entries);
1113 dataSize = ntohl (hdr.size);
1114 if ((sizeof (struct MetaDataEntry) * ic) > dataSize)
1116 GNUNET_break_op (0);
1122 if (dataSize >= GNUNET_MAX_MALLOC_CHECKED)
1124 /* make sure we don't blow our memory limit because of a mal-formed
1126 GNUNET_break_op (0);
1130 decompress ((const char *) &input[sizeof (struct MetaDataHeader)],
1131 size - sizeof (struct MetaDataHeader), dataSize);
1134 GNUNET_break_op (0);
1142 cdata = (const char *) &input[sizeof (struct MetaDataHeader)];
1143 if (dataSize != size - sizeof (struct MetaDataHeader))
1145 GNUNET_break_op (0);
1150 md = GNUNET_CONTAINER_meta_data_create ();
1151 left = dataSize - ic * sizeof (struct MetaDataEntry);
1152 mdata = &cdata[ic * sizeof (struct MetaDataEntry)];
1156 &cdata[i * sizeof(struct MetaDataEntry)],
1157 sizeof (struct MetaDataEntry));
1158 format = (enum EXTRACTOR_MetaFormat) ntohl (ent.format);
1159 if ( (format != EXTRACTOR_METAFORMAT_UTF8) &&
1160 (format != EXTRACTOR_METAFORMAT_C_STRING) &&
1161 (format != EXTRACTOR_METAFORMAT_BINARY) )
1163 GNUNET_break_op (0);
1166 dlen = ntohl (ent.data_size);
1167 plen = ntohl (ent.plugin_name_len);
1168 mlen = ntohl (ent.mime_type_len);
1171 GNUNET_break_op (0);
1175 meta_data = &mdata[left];
1176 if ( (format == EXTRACTOR_METAFORMAT_UTF8) ||
1177 (format == EXTRACTOR_METAFORMAT_C_STRING) )
1180 (mdata[left + dlen - 1] != '\0') )
1182 GNUNET_break_op (0);
1188 GNUNET_break_op (0);
1193 (mdata[left + plen - 1] != '\0') )
1195 GNUNET_break_op (0);
1201 plugin_name = &mdata[left];
1205 GNUNET_break_op (0);
1210 (mdata[left + mlen - 1] != '\0') )
1212 GNUNET_break_op (0);
1218 mime_type = &mdata[left];
1219 GNUNET_CONTAINER_meta_data_insert (md,
1221 (enum EXTRACTOR_MetaType) ntohl (ent.type),
1227 GNUNET_free_non_null (data);
1232 /* end of container_meta_data.c */