/* exif-mnote-data-fuji.c * * Copyright (c) 2002 Lutz Mueller <lutz@users.sourceforge.net> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #include <stdlib.h> #include <string.h> #include <config.h> #include <libexif/exif-byte-order.h> #include <libexif/exif-utils.h> #include "exif-mnote-data-fuji.h" struct _MNoteFujiDataPrivate { ExifByteOrder order; }; static void exif_mnote_data_fuji_clear (ExifMnoteDataFuji *n) { ExifMnoteData *d = (ExifMnoteData *) n; unsigned int i; if (!n) return; if (n->entries) { for (i = 0; i < n->count; i++) if (n->entries[i].data) { exif_mem_free (d->mem, n->entries[i].data); n->entries[i].data = NULL; } exif_mem_free (d->mem, n->entries); n->entries = NULL; n->count = 0; } } static void exif_mnote_data_fuji_free (ExifMnoteData *n) { if (!n) return; exif_mnote_data_fuji_clear ((ExifMnoteDataFuji *) n); } static char * exif_mnote_data_fuji_get_value (ExifMnoteData *d, unsigned int i, char *val, unsigned int maxlen) { ExifMnoteDataFuji *n = (ExifMnoteDataFuji *) d; if (!d || !val) return NULL; if (i > n->count -1) return NULL; exif_log (d->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteDataFuji", "Querying value for tag '%s'...", mnote_fuji_tag_get_name (n->entries[i].tag)); return mnote_fuji_entry_get_value (&n->entries[i], val, maxlen); } static void exif_mnote_data_fuji_save (ExifMnoteData *ne, unsigned char **buf, unsigned int *buf_size) { ExifMnoteDataFuji *n = (ExifMnoteDataFuji *) ne; size_t i, o, s, doff; unsigned char *t; size_t ts; if (!n || !buf || !buf_size) return; /* * Allocate enough memory for all entries and the number * of entries. */ *buf_size = 8 + 4 + 2 + n->count * 12 + 4; *buf = exif_mem_alloc (ne->mem, *buf_size); if (!*buf) { *buf_size = 0; return; } /* * Header: "FUJIFILM" and 4 bytes offset to the first entry. * As the first entry will start right thereafter, the offset is 12. */ memcpy (*buf, "FUJIFILM", 8); exif_set_long (*buf + 8, n->order, 12); /* Save the number of entries */ exif_set_short (*buf + 8 + 4, n->order, (ExifShort) n->count); /* Save each entry */ for (i = 0; i < n->count; i++) { o = 8 + 4 + 2 + i * 12; exif_set_short (*buf + o + 0, n->order, (ExifShort) n->entries[i].tag); exif_set_short (*buf + o + 2, n->order, (ExifShort) n->entries[i].format); exif_set_long (*buf + o + 4, n->order, n->entries[i].components); o += 8; s = exif_format_get_size (n->entries[i].format) * n->entries[i].components; if (s > 65536) { /* Corrupt data: EXIF data size is limited to the * maximum size of a JPEG segment (64 kb). */ continue; } if (s > 4) { ts = *buf_size + s; /* Ensure even offsets. Set padding bytes to 0. */ if (s & 1) ts += 1; t = exif_mem_realloc (ne->mem, *buf, ts); if (!t) { return; } *buf = t; *buf_size = ts; doff = *buf_size - s; if (s & 1) { doff--; *(*buf + *buf_size - 1) = '\0'; } exif_set_long (*buf + o, n->order, doff); } else doff = o; /* * Write the data. Fill unneeded bytes with 0. Do not * crash if data is NULL. */ if (!n->entries[i].data) memset (*buf + doff, 0, s); else memcpy (*buf + doff, n->entries[i].data, s); } } static void exif_mnote_data_fuji_load (ExifMnoteData *en, const unsigned char *buf, unsigned int buf_size) { ExifMnoteDataFuji *n = (ExifMnoteDataFuji*) en; ExifLong c; size_t i, o, s, datao = 6 + n->offset; MnoteFujiEntry *t; if (!n || !buf || !buf_size || (buf_size < datao + 12)) return; /* Read the number of entries and remove old ones. */ n->order = EXIF_BYTE_ORDER_INTEL; datao += exif_get_long (buf + datao + 8, EXIF_BYTE_ORDER_INTEL); c = exif_get_short (buf + datao, EXIF_BYTE_ORDER_INTEL); datao += 2; exif_mnote_data_fuji_clear (n); /* Parse the entries */ for (i = 0; i < c; i++) { o = datao + 12 * i; if (datao + 12 > buf_size) return; t = exif_mem_realloc (en->mem, n->entries, sizeof (MnoteFujiEntry) * (i + 1)); if (!t) return; n->count = i + 1; n->entries = t; memset (&n->entries[i], 0, sizeof (MnoteFujiEntry)); n->entries[i].tag = exif_get_short (buf + o, n->order); n->entries[i].format = exif_get_short (buf + o + 2, n->order); n->entries[i].components = exif_get_long (buf + o + 4, n->order); n->entries[i].order = n->order; /* * Size? If bigger than 4 bytes, the actual data is not * in the entry but somewhere else (offset). */ s = exif_format_get_size (n->entries[i].format) * n->entries[i].components; if (!s) return; o += 8; if (s > 4) o = exif_get_long (buf + o, n->order) + 6 + n->offset; if (o + s > buf_size) return; /* Sanity check */ n->entries[i].data = exif_mem_alloc (en->mem, s); if (!n->entries[i].data) return; n->entries[i].size = s; memcpy (n->entries[i].data, buf + o, s); } } static unsigned int exif_mnote_data_fuji_count (ExifMnoteData *n) { return n ? ((ExifMnoteDataFuji *) n)->count : 0; } static unsigned int exif_mnote_data_fuji_get_id (ExifMnoteData *d, unsigned int n) { ExifMnoteDataFuji *note = (ExifMnoteDataFuji *) d; if (!note) return 0; if (note->count <= n) return 0; return note->entries[n].tag; } static const char * exif_mnote_data_fuji_get_name (ExifMnoteData *d, unsigned int i) { ExifMnoteDataFuji *n = (ExifMnoteDataFuji *) d; if (!n) return NULL; if (i >= n->count) return NULL; return mnote_fuji_tag_get_name (n->entries[i].tag); } static const char * exif_mnote_data_fuji_get_title (ExifMnoteData *d, unsigned int i) { ExifMnoteDataFuji *n = (ExifMnoteDataFuji *) d; if (!n) return NULL; if (i >= n->count) return NULL; return mnote_fuji_tag_get_title (n->entries[i].tag); } static const char * exif_mnote_data_fuji_get_description (ExifMnoteData *d, unsigned int i) { ExifMnoteDataFuji *n = (ExifMnoteDataFuji *) d; if (!n) return NULL; if (i >= n->count) return NULL; return mnote_fuji_tag_get_description (n->entries[i].tag); } static void exif_mnote_data_fuji_set_byte_order (ExifMnoteData *d, ExifByteOrder o) { ExifByteOrder o_orig; ExifMnoteDataFuji *n = (ExifMnoteDataFuji *) d; unsigned int i; if (!n) return; o_orig = n->order; n->order = o; for (i = 0; i < n->count; i++) { n->entries[i].order = o; exif_array_set_byte_order (n->entries[i].format, n->entries[i].data, n->entries[i].components, o_orig, o); } } static void exif_mnote_data_fuji_set_offset (ExifMnoteData *n, unsigned int o) { if (n) ((ExifMnoteDataFuji *) n)->offset = o; } ExifMnoteData * exif_mnote_data_fuji_new (ExifMem *mem) { ExifMnoteData *d; if (!mem) return NULL; d = exif_mem_alloc (mem, sizeof (ExifMnoteDataFuji)); if (!d) return NULL; exif_mnote_data_construct (d, mem); /* Set up function pointers */ d->methods.free = exif_mnote_data_fuji_free; d->methods.set_byte_order = exif_mnote_data_fuji_set_byte_order; d->methods.set_offset = exif_mnote_data_fuji_set_offset; d->methods.load = exif_mnote_data_fuji_load; d->methods.save = exif_mnote_data_fuji_save; d->methods.count = exif_mnote_data_fuji_count; d->methods.get_id = exif_mnote_data_fuji_get_id; d->methods.get_name = exif_mnote_data_fuji_get_name; d->methods.get_title = exif_mnote_data_fuji_get_title; d->methods.get_description = exif_mnote_data_fuji_get_description; d->methods.get_value = exif_mnote_data_fuji_get_value; return d; }