Add libexif to deps/third_party.

libexif/sources/libexif/canon/exif-mnote-data-canon.c

Index: libexif/sources/libexif/canon/exif-mnote-data-canon.c
===================================================================
--- libexif/sources/libexif/canon/exif-mnote-data-canon.c	(revision 0)
+++ libexif/sources/libexif/canon/exif-mnote-data-canon.c	(revision 0)
@@ -0,0 +1,389 @@
+/* exif-mnote-data-canon.c
+ *
+ * Copyright (c) 2002, 2003 Lutz Mueller <lutz@users.sourceforge.net>
+ * Copyright (c) 2003 Matthieu Castet <mat-c@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., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301  USA.
+ */
+
+#include <config.h>
+#include "exif-mnote-data-canon.h"
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include <libexif/exif-byte-order.h>
+#include <libexif/exif-utils.h>
+#include <libexif/exif-data.h>
+
+#define DEBUG
+
+static void
+exif_mnote_data_canon_clear (ExifMnoteDataCanon *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_canon_free (ExifMnoteData *n)
+{
+	if (!n) return;
+
+	exif_mnote_data_canon_clear ((ExifMnoteDataCanon *) n);
+}
+
+static void
+exif_mnote_data_canon_get_tags (ExifMnoteDataCanon *dc, unsigned int n,
+		unsigned int *m, unsigned int *s)
+{
+	unsigned int from = 0, to;
+
+	if (!dc || !m) return;
+	for (*m = 0; *m < dc->count; (*m)++) {
+		to = from + mnote_canon_entry_count_values (&dc->entries[*m]);
+		if (to > n) {
+			if (s) *s = n - from;
+			break;
+		}
+		from = to;
+	}
+}
+
+static char *
+exif_mnote_data_canon_get_value (ExifMnoteData *note, unsigned int n, char *val, unsigned int maxlen)
+{
+	ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note;
+	unsigned int m, s;
+
+	if (!dc) return NULL;
+	exif_mnote_data_canon_get_tags (dc, n, &m, &s);
+	if (m >= dc->count) return NULL;
+	return mnote_canon_entry_get_value (&dc->entries[m], s, val, maxlen);
+}
+
+static void
+exif_mnote_data_canon_set_byte_order (ExifMnoteData *d, ExifByteOrder o)
+{
+	ExifByteOrder o_orig;
+	ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) 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_canon_set_offset (ExifMnoteData *n, unsigned int o)
+{
+	if (n) ((ExifMnoteDataCanon *) n)->offset = o;
+}
+
+static void
+exif_mnote_data_canon_save (ExifMnoteData *ne, 
+	unsigned char **buf, unsigned int *buf_size)
+{
+	ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) 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 = 2 + n->count * 12 + 4;
+	*buf = exif_mem_alloc (ne->mem, sizeof (char) * *buf_size);
+	if (!*buf) {
+		EXIF_LOG_NO_MEMORY(ne->log, "ExifMnoteCanon", *buf_size);
+		return;
+	}
+
+	/* Save the number of entries */
+	exif_set_short (*buf, n->order, (ExifShort) n->count);
+	
+	/* Save each entry */
+	for (i = 0; i < n->count; i++) {
+		o = 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,
+						 sizeof (char) * ts);
+			if (!t) {
+				EXIF_LOG_NO_MEMORY(ne->log, "ExifMnoteCanon", ts);
+				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, n->offset + 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);
+		if (s < 4) memset (*buf + doff + s, 0, (4 - s));
+	}
+}
+
+/* XXX
+ * FIXME: exif_mnote_data_canon_load() may fail and there is no
+ *        semantics to express that.
+ *        See bug #1054323 for details, especially the comment by liblit
+ *        after it has supposedly been fixed:
+ *
+ *        https://sourceforge.net/tracker/?func=detail&aid=1054323&group_id=12272&atid=112272
+ *        Unfortunately, the "return" statements aren't commented at
+ *        all, so it isn't trivial to find out what is a normal
+ *        return, and what is a reaction to an error condition.
+ */
+
+static void
+exif_mnote_data_canon_load (ExifMnoteData *ne,
+	const unsigned char *buf, unsigned int buf_size)
+{
+	ExifMnoteDataCanon *n = (ExifMnoteDataCanon *) ne;
+	ExifShort c;
+	size_t i, tcount, o, datao;
+
+	if (!n || !buf || !buf_size) {
+		exif_log (ne->log, EXIF_LOG_CODE_CORRUPT_DATA,
+			  "ExifMnoteCanon", "Short MakerNote");
+		return;
+	}
+	datao = 6 + n->offset;
+	if ((datao + 2 < datao) || (datao + 2 < 2) || (datao + 2 > buf_size)) {
+		exif_log (ne->log, EXIF_LOG_CODE_CORRUPT_DATA,
+			  "ExifMnoteCanon", "Short MakerNote");
+		return;
+	}
+
+	/* Read the number of tags */
+	c = exif_get_short (buf + datao, n->order);
+	datao += 2;
+
+	/* Remove any old entries */
+	exif_mnote_data_canon_clear (n);
+
+	/* Reserve enough space for all the possible MakerNote tags */
+	n->entries = exif_mem_alloc (ne->mem, sizeof (MnoteCanonEntry) * c);
+	if (!n->entries) {
+		EXIF_LOG_NO_MEMORY(ne->log, "ExifMnoteCanon", sizeof (MnoteCanonEntry) * c);
+		return;
+	}
+
+	/* Parse the entries */
+	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 (ne->log, EXIF_LOG_CODE_CORRUPT_DATA,
+				"ExifMnoteCanon", "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 (ne->log, EXIF_LOG_CODE_DEBUG, "ExifMnoteCanon",
+			"Loading entry 0x%x ('%s')...", n->entries[tcount].tag,
+			 mnote_canon_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) {
+			exif_log (ne->log, EXIF_LOG_CODE_CORRUPT_DATA,
+				  "ExifMnoteCanon",
+				  "Invalid zero-length tag size");
+			continue;
+
+		} else {
+			size_t dataofs = o + 8;
+			if (s > 4) dataofs = exif_get_long (buf + dataofs, n->order) + 6;
+			if ((dataofs + s < s) || (dataofs + s < dataofs) || (dataofs + s > buf_size)) {
+				exif_log (ne->log, EXIF_LOG_CODE_DEBUG,
+					"ExifMnoteCanon",
+					"Tag data past end of buffer (%u > %u)",
+					dataofs + s, buf_size);
+				continue;
+			}
+
+			n->entries[tcount].data = exif_mem_alloc (ne->mem, s);
+			if (!n->entries[tcount].data) {
+				EXIF_LOG_NO_MEMORY(ne->log, "ExifMnoteCanon", 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;
+}
+
+static unsigned int
+exif_mnote_data_canon_count (ExifMnoteData *n)
+{
+	ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) n;
+	unsigned int i, c;
+
+	for (i = c = 0; dc && (i < dc->count); i++)
+		c += mnote_canon_entry_count_values (&dc->entries[i]);
+	return c;
+}
+
+static unsigned int
+exif_mnote_data_canon_get_id (ExifMnoteData *d, unsigned int i)
+{
+	ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) d;
+	unsigned int m;
+
+	if (!dc) return 0;
+	exif_mnote_data_canon_get_tags (dc, i, &m, NULL);
+	if (m >= dc->count) return 0;
+	return dc->entries[m].tag;
+}
+
+static const char *
+exif_mnote_data_canon_get_name (ExifMnoteData *note, unsigned int i)
+{
+	ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note;
+	unsigned int m, s;
+
+	if (!dc) return NULL;
+	exif_mnote_data_canon_get_tags (dc, i, &m, &s);
+	if (m >= dc->count) return NULL;
+	return mnote_canon_tag_get_name_sub (dc->entries[m].tag, s, dc->options);
+}
+
+static const char *
+exif_mnote_data_canon_get_title (ExifMnoteData *note, unsigned int i)
+{
+	ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note;
+	unsigned int m, s;
+
+	if (!dc) return NULL;
+	exif_mnote_data_canon_get_tags (dc, i, &m, &s);
+	if (m >= dc->count) return NULL;
+	return mnote_canon_tag_get_title_sub (dc->entries[m].tag, s, dc->options);
+}
+
+static const char *
+exif_mnote_data_canon_get_description (ExifMnoteData *note, unsigned int i)
+{
+	ExifMnoteDataCanon *dc = (ExifMnoteDataCanon *) note;
+	unsigned int m;
+
+	if (!dc) return NULL;
+	exif_mnote_data_canon_get_tags (dc, i, &m, NULL);
+	if (m >= dc->count) return NULL;
+	return mnote_canon_tag_get_description (dc->entries[m].tag);
+}
+
+int
+exif_mnote_data_canon_identify (const ExifData *ed, const ExifEntry *e)
+{
+	char value[8];
+	ExifEntry *em = exif_data_get_entry (ed, EXIF_TAG_MAKE);
+	if (!em) 
+		return 0;
+	return !strcmp (exif_entry_get_value (em, value, sizeof (value)), "Canon");
+}
+
+ExifMnoteData *
+exif_mnote_data_canon_new (ExifMem *mem, ExifDataOption o)
+{
+	ExifMnoteData *d;
+	ExifMnoteDataCanon *dc;
+
+	if (!mem) return NULL;
+
+	d = exif_mem_alloc (mem, sizeof (ExifMnoteDataCanon));
+	if (!d)
+		return NULL;
+
+	exif_mnote_data_construct (d, mem);
+
+	/* Set up function pointers */
+	d->methods.free            = exif_mnote_data_canon_free;
+	d->methods.set_byte_order  = exif_mnote_data_canon_set_byte_order;
+	d->methods.set_offset      = exif_mnote_data_canon_set_offset;
+	d->methods.load            = exif_mnote_data_canon_load;
+	d->methods.save            = exif_mnote_data_canon_save;
+	d->methods.count           = exif_mnote_data_canon_count;
+	d->methods.get_id          = exif_mnote_data_canon_get_id;
+	d->methods.get_name        = exif_mnote_data_canon_get_name;
+	d->methods.get_title       = exif_mnote_data_canon_get_title;
+	d->methods.get_description = exif_mnote_data_canon_get_description;
+	d->methods.get_value       = exif_mnote_data_canon_get_value;
+
+	dc = (ExifMnoteDataCanon*)d;
+	dc->options = o;
+	return d;
+}
Property changes on: libexif/sources/libexif/canon/exif-mnote-data-canon.c
___________________________________________________________________
Added: svn:eol-style
   + LF