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 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_load (ExifMnoteData *en,
const unsigned char *buf, unsigned int buf_size)
{
ExifMnoteDataFuji *n = (ExifMnoteDataFuji*) en;
ExifLong c;
size_t i, tcount, o, datao;
if (!n || !buf || !buf_size) {
exif_log (en->log, EXIF_LOG_CODE_CORRUPT_DATA,
"ExifMnoteDataFuji", "Short MakerNote");
return;
}
datao = 6 + n->offset;
if ((datao + 12 < datao) || (datao + 12 < 12) || (datao + 12 > buf_size)) {
exif_log (en->log, EXIF_LOG_CODE_CORRUPT_DATA,
"ExifMnoteDataFuji", "Short MakerNote");
return;
}
n->order = EXIF_BYTE_ORDER_INTEL;
datao += exif_get_long (buf + datao + 8, EXIF_BYTE_ORDER_INTEL);
if ((datao + 2 < datao) || (datao + 2 < 2) ||
(datao + 2 > buf_size)) {
exif_log (en->log, EXIF_LOG_CODE_CORRUPT_DATA,
"ExifMnoteDataFuji", "Short MakerNote");
return;
}
/* Read the number of tags */
c = exif_get_short (buf + datao, EXIF_BYTE_ORDER_INTEL);
datao += 2;
/* Remove any old entries */
exif_mnote_data_fuji_clear (n);
/* Reserve enough space for all the possible MakerNote tags */
n->entries = exif_mem_alloc (en->mem, sizeof (MnoteFujiEntry) * c);
if (!n->entries) {
EXIF_LOG_NO_MEMORY(en->log, "ExifMnoteDataFuji", sizeof (MnoteFujiEntry) * c);
return;
}
/* Parse all c entries, storing ones that are successfully parsed */
tcount = 0;
for (i = c, o = datao; i; --i, o += 12) {
size_t s;
if ((o + 12 < o) || (o + 12 < 12) || (o + 12 > buf_size)) {
exif_log (en->log, EXIF_LOG_CODE_CORRUPT_DATA,
"ExifMnoteDataFuji", "Short MakerNote");
break;
}
n->entries[tcount].tag = exif_get_short (buf + o, n->order);
n->entries[tcount].format = exif_get_short (buf + o + 2, n->order);
n->entries[tcount].components = exif_get_long (buf + o + 4, n->order);
n->entries[tcount].order = n->order;
exif_log (en->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteDataFuji",
"Loading entry 0x%x ('%s')...", n->entries[tcount].tag,
mnote_fuji_tag_get_name (n->entries[tcount].tag));
/*
* 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[tcount].format) * n->entries[tcount].components;
n->entries[tcount].size = s;
if (s) {
size_t dataofs = o + 8;
if (s > 4)
/* The data in this case is merely a pointer */
dataofs = exif_get_long (buf + dataofs, n->order) + 6 + n->offset;
if ((dataofs + s < dataofs) || (dataofs + s < s) ||
(dataofs + s >= buf_size)) {
exif_log (en->log, EXIF_LOG_CODE_CORRUPT_DATA,
"ExifMnoteDataFuji", "Tag data past end of "
"buffer (%zu >= %u)", dataofs + s, buf_size);
continue;
}
n->entries[tcount].data = exif_mem_alloc (en->mem, s);
if (!n->entries[tcount].data) {
EXIF_LOG_NO_MEMORY(en->log, "ExifMnoteDataFuji", s);
continue;
}
memcpy (n->entries[tcount].data, buf + dataofs, s);
}
/* Tag was successfully parsed */
++tcount;
}
/* Store the count of successfully parsed tags */
n->count = tcount;
}
