1 files changed, 403 insertions, 0 deletions

diff --git a/src/libexif/olympus/exif-mnote-data-olympus.c b/src/libexif/olympus/exif-mnote-data-olympus.c
new file mode 100644
index 0000000..02794c5
--- /dev/null
+++ b/src/libexif/olympus/exif-mnote-data-olympus.c
@@ -0,0 +1,403 @@
+/* exif-mnote-data-olympus.c
+ *
+ * Copyright © 2002, 2003 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 <config.h>
+#include "exif-mnote-data-olympus.h"
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+
+#include <libexif/exif-utils.h>
+#include <libexif/exif-data.h>
+
+#define DEBUG
+
+static void
+exif_mnote_data_olympus_clear (ExifMnoteDataOlympus *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_olympus_free (ExifMnoteData *n)
+{
+	if (!n) return;
+
+	exif_mnote_data_olympus_clear ((ExifMnoteDataOlympus *) n);
+}
+
+static char *
+exif_mnote_data_olympus_get_value (ExifMnoteData *d, unsigned int i, char *val, unsigned int maxlen)
+{
+	ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d;
+
+	if (!d || !val) return NULL;
+	if (i > n->count -1) return NULL;
+	exif_log (d->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteDataOlympus",
+		  "Querying value for tag '%s'...",
+		  mnote_olympus_tag_get_name (n->entries[i].tag));
+	return mnote_olympus_entry_get_value (&n->entries[i], val, maxlen);
+}
+
+static void
+exif_mnote_data_olympus_save (ExifMnoteData *ne,
+		unsigned char **buf, unsigned int *buf_size)
+{
+	ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) ne;
+	unsigned int i, o, s, doff, base = 0, o2 = 6;
+	int datao = 0;
+
+	if (!n || !buf || !buf_size) return;
+
+	/*
+	 * Allocate enough memory for all entries and the number of entries.
+	 */
+	*buf_size = 6 + 2 + 2 + n->count * 12;
+	switch (n->version) {
+	case 0: /* Olympus */
+		*buf = exif_mem_alloc (ne->mem, *buf_size);
+		if (!*buf) return;
+
+		/* Write the header and the number of entries. */
+		strcpy (*buf, "OLYMP");
+		o2 += 2;
+		datao = n->offset;
+		break;
+	case 1: /* Nikon v1 */
+		base = MNOTE_NIKON1_TAG_BASE;
+		*buf_size -= 8;
+		/* Fall through */
+	case 2: /* Nikon v2 */
+		*buf_size += 8;
+		*buf = exif_mem_alloc (ne->mem, *buf_size);
+		if (!*buf) return;
+
+		/* Write the header and the number of entries. */
+		strcpy (*buf, "Nikon");
+		(*buf)[6] = n->version;
+		o2 += 2; *buf_size += 2;
+		if (n->version == 2) {
+			exif_set_short (*buf + 10, n->order, (ExifShort) (
+				(n->order == EXIF_BYTE_ORDER_INTEL) ?
+				('I' << 8) | 'I' :
+				('M' << 8) | 'M'));
+			exif_set_short (*buf + 12, n->order, (ExifShort) 0x2A);
+			exif_set_long (*buf + 14, n->order, (ExifShort) 8);
+			o2 += 2 + 8;
+		}
+		datao = -10;
+		break;
+	}
+
+	exif_set_short (*buf + o2, n->order, (ExifShort) n->count);
+	o2 += 2;
+
+	/* Save each entry */
+	for (i = 0; i < n->count; i++) {
+		o = o2 + i * 12;
+		exif_set_short (*buf + o + 0, n->order,
+				(ExifShort) (n->entries[i].tag - base));
+		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 > 4) {
+			doff = *buf_size;
+			*buf_size += s;
+			*buf = exif_mem_realloc (ne->mem, *buf,
+						 sizeof (char) * *buf_size);
+			if (!*buf) return;
+			exif_set_long (*buf + o, n->order, datao + doff);
+		} else
+			doff = o;
+
+		/* Write the data. */
+		if (n->entries[i].data) {
+			memcpy (*buf + doff, n->entries[i].data, s);
+		} else {
+			/* Most certainly damaged input file */
+			memset (*buf + doff, 0, s);
+		}
+	}
+}
+
+static void
+exif_mnote_data_olympus_load (ExifMnoteData *en,
+			      const unsigned char *buf, unsigned int buf_size)
+{
+	ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) en;
+	ExifShort c;
+	unsigned int i, s, o, o2 = 0, datao = 6, base = 0;
+
+	if (!n || !buf) return;
+
+	/* Start of interesting data */
+	o2 = 6 + n->offset;
+
+	/*
+	 * Olympus headers start with "OLYMP" and need to have at least
+	 * a size of 22 bytes (6 for 'OLYMP', 2 other bytes, 2 for the
+	 * number of entries, and 12 for one entry.
+	 *
+	 * Nikon headers start with "Nikon" (6 bytes including '\0'), 
+	 * version number (1 or 2).
+	 * 
+	 * Version 1 continues with 0, 1, 0, number_of_tags,
+	 * or just with number_of_tags (models D1H, D1X...).
+	 * 
+	 * Version 2 continues with an unknown byte (0 or 10),
+	 * two unknown bytes (0), "MM" or "II", another byte 0 and 
+	 * lastly 0x2A.
+	 */
+	if (buf_size - n->offset < 22) return;
+	if (!memcmp (buf + o2, "OLYMP", 5)) {
+		exif_log (en->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteDataOlympus",
+			"Parsing Olympus maker note...");
+
+		/* The number of entries is at position 8. */
+		n->version = 0;
+		o2 += 8;
+
+	} else if (!memcmp (buf + o2, "Nikon", 6)) {
+		o2 += 6;
+		exif_log (en->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteDataOlympus",
+			"Parsing Nikon maker note (0x%02x, %02x, %02x, "
+			"%02x, %02x, %02x, %02x, %02x)...",
+			buf[o2 + 0], buf[o2 + 1], buf[o2 + 2], buf[o2 + 3], 
+			buf[o2 + 4], buf[o2 + 5], buf[o2 + 6], buf[o2 + 7]); 
+
+		/* The first byte is the version. */
+		if (o2 >= buf_size) return;
+		n->version = buf[o2];
+		o2 += 1;
+
+		/* Skip an unknown byte (00 or 0A). */
+		o2 += 1;
+
+		switch (n->version) {
+		case 1:
+
+			base = MNOTE_NIKON1_TAG_BASE;
+			break;
+
+		case 2:
+
+			/* Skip 2 unknown bytes (00 00). */
+			o2 += 2;
+
+			/*
+			 * Byte order. From here the data offset
+			 * gets calculated.
+			 */
+			datao = o2;
+			if (o2 >= buf_size) return;
+			if (!strncmp (&buf[o2], "II", 2))
+				n->order = EXIF_BYTE_ORDER_INTEL;
+			else if (!strncmp (&buf[o2], "MM", 2))
+				n->order = EXIF_BYTE_ORDER_MOTOROLA;
+			else {
+				exif_log (en->log, EXIF_LOG_CODE_DEBUG,
+					"ExifMnoteDatalympus", "Unknown "
+					"byte order '%c%c'", buf[o2],
+					buf[o2 + 1]);
+				return;
+			}
+			o2 += 2;
+
+			/* Skip 2 unknown bytes (00 2A). */
+			o2 += 2;
+
+			/* Go to where the number of entries is. */
+			if (o2 >= buf_size) return;
+			o2 = datao + exif_get_long (buf + o2, n->order);
+			break;
+
+		default:
+			exif_log (en->log, EXIF_LOG_CODE_DEBUG,
+				"ExifMnoteDataOlympus", "Unknown version "
+				"number %i.", n->version);
+			return;
+		}
+	} else if (!memcmp (buf + o2, "\0\x1b", 2)) {
+		n->version = 2;
+	} else {
+		return;
+	}
+
+	/* Number of entries */
+	if (o2 >= buf_size) return;
+	c = exif_get_short (buf + o2, n->order);
+	o2 += 2;
+
+	/* Read the number of entries and remove old ones. */
+	exif_mnote_data_olympus_clear (n);
+
+	n->entries = exif_mem_alloc (en->mem, sizeof (MnoteOlympusEntry) * c);
+	if (!n->entries) return;
+
+	/* Parse the entries */
+	for (i = 0; i < c; i++) {
+	    o = o2 + 12 * i;
+	    if (o + 12 > buf_size) return;
+
+	    n->count = i + 1;
+	    n->entries[i].tag        = exif_get_short (buf + o, n->order) + base;
+	    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;
+
+	    exif_log (en->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteOlympus",
+		      "Loading entry 0x%x ('%s')...", n->entries[i].tag,
+		      mnote_olympus_tag_get_name (n->entries[i].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[i].format) *
+		   			 n->entries[i].components;
+	    if (!s) continue;
+	    o += 8;
+	    if (s > 4) o = exif_get_long (buf + o, n->order) + datao;
+	    if (o + s > buf_size) continue;
+
+	    /* Sanity check */
+	    n->entries[i].data = exif_mem_alloc (en->mem, s);
+	    if (!n->entries[i].data) continue;
+	    n->entries[i].size = s;
+	    memcpy (n->entries[i].data, buf + o, s);
+	}
+}
+
+static unsigned int
+exif_mnote_data_olympus_count (ExifMnoteData *n)
+{
+	return n ? ((ExifMnoteDataOlympus *) n)->count : 0;
+}
+
+static unsigned int
+exif_mnote_data_olympus_get_id (ExifMnoteData *d, unsigned int n)
+{
+	ExifMnoteDataOlympus *note = (ExifMnoteDataOlympus *) d;
+
+	if (!note) return 0;
+	if (note->count <= n) return 0;
+	return note->entries[n].tag;
+}
+
+static const char *
+exif_mnote_data_olympus_get_name (ExifMnoteData *d, unsigned int i)
+{
+	ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d;
+
+	if (!n) return NULL;
+	if (i >= n->count) return NULL;
+	return mnote_olympus_tag_get_name (n->entries[i].tag);
+}
+
+static const char *
+exif_mnote_data_olympus_get_title (ExifMnoteData *d, unsigned int i)
+{
+	ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d;
+	
+	if (!n) return NULL;
+	if (i >= n->count) return NULL;
+        return mnote_olympus_tag_get_title (n->entries[i].tag);
+}
+
+static const char *
+exif_mnote_data_olympus_get_description (ExifMnoteData *d, unsigned int i)
+{
+	ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) d;
+	
+	if (!n) return NULL;
+	if (i >= n->count) return NULL;
+        return mnote_olympus_tag_get_title (n->entries[i].tag);
+}
+
+static void
+exif_mnote_data_olympus_set_byte_order (ExifMnoteData *d, ExifByteOrder o)
+{
+	ExifByteOrder o_orig;
+	ExifMnoteDataOlympus *n = (ExifMnoteDataOlympus *) 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_olympus_set_offset (ExifMnoteData *n, unsigned int o)
+{
+	if (n) ((ExifMnoteDataOlympus *) n)->offset = o;
+}
+
+ExifMnoteData *
+exif_mnote_data_olympus_new (ExifMem *mem)
+{
+	ExifMnoteData *d;
+
+	if (!mem) return NULL;
+	
+	d = exif_mem_alloc (mem, sizeof (ExifMnoteDataOlympus));
+	if (!d) return NULL;
+
+	exif_mnote_data_construct (d, mem);
+
+	/* Set up function pointers */
+	d->methods.free            = exif_mnote_data_olympus_free;
+	d->methods.set_byte_order  = exif_mnote_data_olympus_set_byte_order;
+	d->methods.set_offset      = exif_mnote_data_olympus_set_offset;
+	d->methods.load            = exif_mnote_data_olympus_load;
+	d->methods.save            = exif_mnote_data_olympus_save;
+	d->methods.count           = exif_mnote_data_olympus_count;
+	d->methods.get_id          = exif_mnote_data_olympus_get_id;
+	d->methods.get_name        = exif_mnote_data_olympus_get_name;
+	d->methods.get_title       = exif_mnote_data_olympus_get_title;
+	d->methods.get_description = exif_mnote_data_olympus_get_description;
+	d->methods.get_value       = exif_mnote_data_olympus_get_value;
+
+	return d;
+}