Add libexif to deps/third_party.

libexif/sources/libexif/exif-entry.c

Index: libexif/sources/libexif/exif-entry.c
===================================================================
--- libexif/sources/libexif/exif-entry.c	(revision 0)
+++ libexif/sources/libexif/exif-entry.c	(revision 0)
@@ -0,0 +1,1712 @@
+/* exif-entry.c
+ *
+ * Copyright (c) 2001 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., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301  USA.
+ */
+
+#include <config.h>
+
+#include <libexif/exif-entry.h>
+#include <libexif/exif-ifd.h>
+#include <libexif/exif-utils.h>
+#include <libexif/i18n.h>
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <math.h>
+
+#ifndef M_PI
+#define M_PI 3.14159265358979323846
+#endif
+
+struct _ExifEntryPrivate
+{
+	unsigned int ref_count;
+
+	ExifMem *mem;
+};
+
+/* This function is hidden in exif-data.c */
+ExifLog *exif_data_get_log (ExifData *);
+
+#ifndef NO_VERBOSE_TAG_STRINGS
+static void
+exif_entry_log (ExifEntry *e, ExifLogCode code, const char *format, ...)
+{
+	va_list args;
+	ExifLog *l = NULL;
+
+	if (e && e->parent && e->parent->parent)
+		l = exif_data_get_log (e->parent->parent);
+	va_start (args, format);
+	exif_logv (l, code, "ExifEntry", format, args);
+	va_end (args);
+}
+#else
+#if defined(__STDC_VERSION__) &&  __STDC_VERSION__ >= 199901L
+#define exif_entry_log(...) do { } while (0)
+#elif defined(__GNUC__)
+#define exif_entry_log(x...) do { } while (0)
+#else
+#define exif_entry_log (void)
+#endif
+#endif
+
+static void *
+exif_entry_alloc (ExifEntry *e, unsigned int i)
+{
+	void *d;
+	ExifLog *l = NULL;
+
+	if (!e || !e->priv || !i) return NULL;
+
+	d = exif_mem_alloc (e->priv->mem, i);
+	if (d) return d;
+
+	if (e->parent && e->parent->parent)
+		l = exif_data_get_log (e->parent->parent);
+	EXIF_LOG_NO_MEMORY (l, "ExifEntry", i);
+	return NULL;
+}
+
+static void *
+exif_entry_realloc (ExifEntry *e, void *d_orig, unsigned int i)
+{
+	void *d;
+	ExifLog *l = NULL;
+
+	if (!e || !e->priv) return NULL;
+
+	if (!i) { exif_mem_free (e->priv->mem, d_orig); return NULL; }
+
+	d = exif_mem_realloc (e->priv->mem, d_orig, i);
+	if (d) return d;
+
+	if (e->parent && e->parent->parent)
+		l = exif_data_get_log (e->parent->parent);
+	EXIF_LOG_NO_MEMORY (l, "ExifEntry", i);
+	return NULL;
+}
+
+ExifEntry *
+exif_entry_new (void)
+{
+	ExifMem *mem = exif_mem_new_default ();
+	ExifEntry *e = exif_entry_new_mem (mem);
+
+	exif_mem_unref (mem);
+
+	return e;
+}
+
+ExifEntry *
+exif_entry_new_mem (ExifMem *mem)
+{
+	ExifEntry *e = NULL;
+
+	e = exif_mem_alloc (mem, sizeof (ExifEntry));
+	if (!e) return NULL;
+	e->priv = exif_mem_alloc (mem, sizeof (ExifEntryPrivate));
+	if (!e->priv) { exif_mem_free (mem, e); return NULL; }
+	e->priv->ref_count = 1;
+
+	e->priv->mem = mem;
+	exif_mem_ref (mem);
+
+	return e;
+}
+
+void
+exif_entry_ref (ExifEntry *e)
+{
+	if (!e) return;
+
+	e->priv->ref_count++;
+}
+
+void
+exif_entry_unref (ExifEntry *e)
+{
+	if (!e) return;
+
+	e->priv->ref_count--;
+	if (!e->priv->ref_count)
+		exif_entry_free (e);
+}
+
+void
+exif_entry_free (ExifEntry *e)
+{
+	if (!e) return;
+
+	if (e->priv) {
+		ExifMem *mem = e->priv->mem;
+		if (e->data)
+			exif_mem_free (mem, e->data);
+		exif_mem_free (mem, e->priv);
+		exif_mem_free (mem, e);
+		exif_mem_unref (mem);
+	}
+}
+
+/*! Get a value and convert it to an ExifShort.
+ * \bug Not all types are converted that could be converted and no indication
+ *      is made when that occurs
+ */
+static inline ExifShort
+exif_get_short_convert (const unsigned char *buf, ExifFormat format,
+			ExifByteOrder order)
+{
+	switch (format) {
+	case EXIF_FORMAT_LONG:
+		return (ExifShort) exif_get_long (buf, order);
+	case EXIF_FORMAT_SLONG:
+		return (ExifShort) exif_get_slong (buf, order);
+	case EXIF_FORMAT_SHORT:
+		return (ExifShort) exif_get_short (buf, order);
+	case EXIF_FORMAT_SSHORT:
+		return (ExifShort) exif_get_sshort (buf, order);
+	case EXIF_FORMAT_BYTE:
+	case EXIF_FORMAT_SBYTE:
+		return (ExifShort) buf[0];
+	default:
+		/* Unsupported type */
+		return (ExifShort) 0;
+	}
+}
+
+void
+exif_entry_fix (ExifEntry *e)
+{
+	unsigned int i, newsize;
+	unsigned char *newdata;
+	ExifByteOrder o;
+	ExifRational r;
+	ExifSRational sr;
+
+	if (!e || !e->priv) return;
+
+	switch (e->tag) {
+	
+	/* These tags all need to be of format SHORT. */
+	case EXIF_TAG_YCBCR_SUB_SAMPLING:
+	case EXIF_TAG_SUBJECT_AREA:
+	case EXIF_TAG_COLOR_SPACE:
+	case EXIF_TAG_PLANAR_CONFIGURATION:
+	case EXIF_TAG_SENSING_METHOD:
+	case EXIF_TAG_ORIENTATION:
+	case EXIF_TAG_YCBCR_POSITIONING:
+	case EXIF_TAG_PHOTOMETRIC_INTERPRETATION:
+	case EXIF_TAG_CUSTOM_RENDERED:
+	case EXIF_TAG_EXPOSURE_MODE:
+	case EXIF_TAG_WHITE_BALANCE:
+	case EXIF_TAG_SCENE_CAPTURE_TYPE:
+	case EXIF_TAG_GAIN_CONTROL:
+	case EXIF_TAG_SATURATION:
+	case EXIF_TAG_CONTRAST:
+	case EXIF_TAG_SHARPNESS:
+	case EXIF_TAG_ISO_SPEED_RATINGS:
+		switch (e->format) {
+		case EXIF_FORMAT_LONG:
+		case EXIF_FORMAT_SLONG:
+		case EXIF_FORMAT_BYTE:
+		case EXIF_FORMAT_SBYTE:
+		case EXIF_FORMAT_SSHORT:
+			if (!e->parent || !e->parent->parent) break;
+			exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+				_("Tag '%s' was of format '%s' (which is "
+				"against specification) and has been "
+				"changed to format '%s'."),
+				exif_tag_get_name_in_ifd(e->tag,
+							exif_entry_get_ifd(e)),
+				exif_format_get_name (e->format),
+				exif_format_get_name (EXIF_FORMAT_SHORT));
+
+			o = exif_data_get_byte_order (e->parent->parent);
+			newsize = e->components * exif_format_get_size (EXIF_FORMAT_SHORT);
+			newdata = exif_entry_alloc (e, newsize);
+			if (!newdata) {
+				exif_entry_log (e, EXIF_LOG_CODE_NO_MEMORY,
+					"Could not allocate %lu byte(s).", (unsigned long)newsize);
+				break;
+			}
+
+			for (i = 0; i < e->components; i++)
+				exif_set_short (
+					newdata + i *
+					exif_format_get_size (
+					 EXIF_FORMAT_SHORT), o,
+					 exif_get_short_convert (
+					  e->data + i *
+					  exif_format_get_size (e->format),
+					  e->format, o));
+
+			exif_mem_free (e->priv->mem, e->data);
+			e->data = newdata;
+			e->size = newsize;
+			e->format = EXIF_FORMAT_SHORT;
+			break;
+		case EXIF_FORMAT_SHORT:
+			/* No conversion necessary */
+			break;
+		default:
+			exif_entry_log (e, EXIF_LOG_CODE_CORRUPT_DATA,
+				_("Tag '%s' is of format '%s' (which is "
+				"against specification) but cannot be changed "
+				"to format '%s'."),
+				exif_tag_get_name_in_ifd(e->tag,
+							exif_entry_get_ifd(e)),
+				exif_format_get_name (e->format),
+				exif_format_get_name (EXIF_FORMAT_SHORT));
+			break;
+		}
+		break;
+
+	/* All these tags need to be of format 'Rational'. */
+	case EXIF_TAG_FNUMBER:
+	case EXIF_TAG_APERTURE_VALUE:
+	case EXIF_TAG_EXPOSURE_TIME:
+	case EXIF_TAG_FOCAL_LENGTH:
+		switch (e->format) {
+		case EXIF_FORMAT_SRATIONAL:
+			if (!e->parent || !e->parent->parent) break;
+			o = exif_data_get_byte_order (e->parent->parent);
+			for (i = 0; i < e->components; i++) {
+				sr = exif_get_srational (e->data + i * 
+					exif_format_get_size (
+						EXIF_FORMAT_SRATIONAL), o);
+				r.numerator = (ExifLong) sr.numerator;
+				r.denominator = (ExifLong) sr.denominator;
+				exif_set_rational (e->data + i *
+					exif_format_get_size (
+						EXIF_FORMAT_RATIONAL), o, r);
+			}
+			e->format = EXIF_FORMAT_RATIONAL;
+			exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+				_("Tag '%s' was of format '%s' (which is "
+				"against specification) and has been "
+				"changed to format '%s'."),
+				exif_tag_get_name_in_ifd(e->tag,
+							exif_entry_get_ifd(e)),
+				exif_format_get_name (EXIF_FORMAT_SRATIONAL),
+				exif_format_get_name (EXIF_FORMAT_RATIONAL));
+			break;
+		default:
+			break;
+		}
+		break;
+
+	/* All these tags need to be of format 'SRational'. */
+	case EXIF_TAG_EXPOSURE_BIAS_VALUE:
+	case EXIF_TAG_BRIGHTNESS_VALUE:
+	case EXIF_TAG_SHUTTER_SPEED_VALUE:
+		switch (e->format) {
+		case EXIF_FORMAT_RATIONAL:
+			if (!e->parent || !e->parent->parent) break;
+			o = exif_data_get_byte_order (e->parent->parent);
+			for (i = 0; i < e->components; i++) {
+				r = exif_get_rational (e->data + i * 
+					exif_format_get_size (
+						EXIF_FORMAT_RATIONAL), o);
+				sr.numerator = (ExifLong) r.numerator;
+				sr.denominator = (ExifLong) r.denominator;
+				exif_set_srational (e->data + i *
+					exif_format_get_size (
+						EXIF_FORMAT_SRATIONAL), o, sr);
+			}
+			e->format = EXIF_FORMAT_SRATIONAL;
+			exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+				_("Tag '%s' was of format '%s' (which is "
+				"against specification) and has been "
+				"changed to format '%s'."),
+				exif_tag_get_name_in_ifd(e->tag,
+							exif_entry_get_ifd(e)),
+				exif_format_get_name (EXIF_FORMAT_RATIONAL),
+				exif_format_get_name (EXIF_FORMAT_SRATIONAL));
+			break;
+		default:
+			break;
+		}
+		break;
+
+	case EXIF_TAG_USER_COMMENT:
+
+		/* Format needs to be UNDEFINED. */
+		if (e->format != EXIF_FORMAT_UNDEFINED) {
+			exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+				_("Tag 'UserComment' had invalid format '%s'. "
+				"Format has been set to 'undefined'."),
+				exif_format_get_name (e->format));
+			e->format = EXIF_FORMAT_UNDEFINED;
+		}
+
+		/* Some packages like Canon ZoomBrowser EX 4.5 store
+		   only one zero byte followed by 7 bytes of rubbish */
+		if ((e->size >= 8) && (e->data[0] == 0)) {
+			memcpy(e->data, "\0\0\0\0\0\0\0\0", 8);
+		}
+
+		/* There need to be at least 8 bytes. */
+		if (e->size < 8) {
+			e->data = exif_entry_realloc (e, e->data, 8 + e->size);
+			if (!e->data) {
+				e->size = 0;
+				e->components = 0;
+				return;
+			}
+
+			/* Assume ASCII */
+			memmove (e->data + 8, e->data, e->size);
+			memcpy (e->data, "ASCII\0\0\0", 8);
+			e->size += 8;
+			e->components += 8;
+			exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+				_("Tag 'UserComment' has been expanded to at "
+				"least 8 bytes in order to follow the "
+				"specification."));
+			break;
+		}
+
+		/*
+		 * If the first 8 bytes are empty and real data starts
+		 * afterwards, let's assume ASCII and claim the 8 first
+		 * bytes for the format specifyer.
+		 */
+		for (i = 0; (i < e->size) && !e->data[i]; i++);
+		if (!i) for ( ; (i < e->size) && (e->data[i] == ' '); i++);
+		if ((i >= 8) && (i < e->size)) {
+			exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+				_("Tag 'UserComment' is not empty but does not "
+				"start with a format identifier. "
+				"This has been fixed."));
+			memcpy (e->data, "ASCII\0\0\0", 8);
+			break;
+		}
+
+		/* 
+		 * First 8 bytes need to follow the specification. If they don't, 
+		 * assume ASCII.
+		 */
+		if (memcmp (e->data, "ASCII\0\0\0"     , 8) &&
+		    memcmp (e->data, "UNICODE\0"       , 8) &&
+		    memcmp (e->data, "JIS\0\0\0\0\0"   , 8) &&
+		    memcmp (e->data, "\0\0\0\0\0\0\0\0", 8)) {
+			e->data = exif_entry_realloc (e, e->data, 8 + e->size);
+			if (!e->data) {
+				e->size = 0;
+				e->components = 0;
+				break;
+			}
+
+			/* Assume ASCII */
+			memmove (e->data + 8, e->data, e->size);
+			memcpy (e->data, "ASCII\0\0\0", 8);
+			e->size += 8;
+			e->components += 8;
+			exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+				_("Tag 'UserComment' did not start with a "
+				"format identifier. This has been fixed."));
+			break;
+		}
+
+		break;
+	default:
+		break;
+	}
+}
+
+/*! Format the value of an ExifEntry for human display in a generic way.
+ * The output is localized. The formatting is independent of the tag number.
+ * \pre The buffer at val is entirely cleared to 0. This guarantees that the
+ *      resulting string will be NUL terminated.
+ * \pre The ExifEntry is already a member of an ExifData.
+ * \param[in] e EXIF entry
+ * \param[out] val buffer in which to store value
+ * \param[in] maxlen one less than the length of the buffer val
+ */
+static void
+exif_entry_format_value(ExifEntry *e, char *val, size_t maxlen)
+{
+	ExifByte v_byte;
+	ExifShort v_short;
+	ExifSShort v_sshort;
+	ExifLong v_long;
+	ExifRational v_rat;
+	ExifSRational v_srat;
+	ExifSLong v_slong;
+	char b[64];
+	unsigned int i;
+	const ExifByteOrder o = exif_data_get_byte_order (e->parent->parent);
+
+	if (!e->size)
+		return;
+	switch (e->format) {
+	case EXIF_FORMAT_UNDEFINED:
+		snprintf (val, maxlen, _("%i bytes undefined data"), e->size);
+		break;
+	case EXIF_FORMAT_BYTE:
+	case EXIF_FORMAT_SBYTE:
+		v_byte = e->data[0];
+		snprintf (val, maxlen, "0x%02x", v_byte);
+		maxlen -= strlen (val);
+		for (i = 1; i < e->components; i++) {
+			v_byte = e->data[i];
+			snprintf (b, sizeof (b), ", 0x%02x", v_byte);
+			strncat (val, b, maxlen);
+			maxlen -= strlen (b);
+			if ((signed)maxlen <= 0) break;
+		}
+		break;
+	case EXIF_FORMAT_SHORT:
+		v_short = exif_get_short (e->data, o);
+		snprintf (val, maxlen, "%u", v_short);
+		maxlen -= strlen (val);
+		for (i = 1; i < e->components; i++) {
+			v_short = exif_get_short (e->data +
+				exif_format_get_size (e->format) * i, o);
+			snprintf (b, sizeof (b), ", %u", v_short);
+			strncat (val, b, maxlen);
+			maxlen -= strlen (b);
+			if ((signed)maxlen <= 0) break;
+		}
+		break;
+	case EXIF_FORMAT_SSHORT:
+		v_sshort = exif_get_sshort (e->data, o);
+		snprintf (val, maxlen, "%i", v_sshort);
+		maxlen -= strlen (val);
+		for (i = 1; i < e->components; i++) {
+			v_sshort = exif_get_short (e->data +
+				exif_format_get_size (e->format) *
+				i, o);
+			snprintf (b, sizeof (b), ", %i", v_sshort);
+			strncat (val, b, maxlen);
+			maxlen -= strlen (b);
+			if ((signed)maxlen <= 0) break;
+		}
+		break;
+	case EXIF_FORMAT_LONG:
+		v_long = exif_get_long (e->data, o);
+		snprintf (val, maxlen, "%lu", (unsigned long) v_long);
+		maxlen -= strlen (val);
+		for (i = 1; i < e->components; i++) {
+			v_long = exif_get_long (e->data +
+				exif_format_get_size (e->format) *
+				i, o);
+			snprintf (b, sizeof (b), ", %lu", (unsigned long) v_long);
+			strncat (val, b, maxlen);
+			maxlen -= strlen (b);
+			if ((signed)maxlen <= 0) break;
+		}
+		break;
+	case EXIF_FORMAT_SLONG:
+		v_slong = exif_get_slong (e->data, o);
+		snprintf (val, maxlen, "%li", (long) v_slong);
+		maxlen -= strlen (val);
+		for (i = 1; i < e->components; i++) {
+			v_slong = exif_get_slong (e->data +
+				exif_format_get_size (e->format) * i, o);
+			snprintf (b, sizeof (b), ", %li", (long) v_slong);
+			strncat (val, b, maxlen);
+			maxlen -= strlen (b);
+			if ((signed)maxlen <= 0) break;
+		}
+		break;
+	case EXIF_FORMAT_ASCII:
+		strncpy (val, (char *) e->data, MIN (maxlen, e->size));
+		break;
+	case EXIF_FORMAT_RATIONAL:
+		for (i = 0; i < e->components; i++) {
+			if (i > 0) {
+				strncat (val, ", ", maxlen);
+				maxlen -= 2;
+			}
+			v_rat = exif_get_rational (
+				e->data + 8 * i, o);
+			if (v_rat.denominator) {
+				/*
+				 * Choose the number of significant digits to
+				 * display based on the size of the denominator.
+				 * It is scaled so that denominators within the
+				 * range 13..120 will show 2 decimal points.
+				 */
+				int decimals = (int)(log10(v_rat.denominator)-0.08+1.0);
+				snprintf (b, sizeof (b), "%2.*f",
+					  decimals,
+					  (double) v_rat.numerator /
+					  (double) v_rat.denominator);
+			} else
+				snprintf (b, sizeof (b), "%lu/%lu",
+				  (unsigned long) v_rat.numerator,
+				  (unsigned long) v_rat.denominator);
+			strncat (val, b, maxlen);
+			maxlen -= strlen (b);
+			if ((signed) maxlen <= 0) break;
+		}
+		break;
+	case EXIF_FORMAT_SRATIONAL:
+		for (i = 0; i < e->components; i++) {
+			if (i > 0) {
+				strncat (val, ", ", maxlen);
+				maxlen -= 2;
+			}
+			v_srat = exif_get_srational (
+				e->data + 8 * i, o);
+			if (v_srat.denominator) {
+				int decimals = (int)(log10(fabs(v_srat.denominator))-0.08+1.0);
+				snprintf (b, sizeof (b), "%2.*f",
+					  decimals,
+					  (double) v_srat.numerator /
+					  (double) v_srat.denominator);
+			} else
+				snprintf (b, sizeof (b), "%li/%li",
+				  (long) v_srat.numerator,
+				  (long) v_srat.denominator);
+			strncat (val, b, maxlen);
+			maxlen -= strlen (b);
+			if ((signed) maxlen <= 0) break;
+		}
+		break;
+	case EXIF_FORMAT_DOUBLE:
+	case EXIF_FORMAT_FLOAT:
+	default:
+		snprintf (val, maxlen, _("%i bytes unsupported data type"),
+			  e->size);
+		break;
+	}
+}
+
+void
+exif_entry_dump (ExifEntry *e, unsigned int indent)
+{
+	char buf[1024];
+	char value[1024];
+	unsigned int i;
+
+	for (i = 0; i < 2 * indent; i++)
+		buf[i] = ' ';
+	buf[i] = '\0';
+
+	if (!e)
+		return;
+
+	printf ("%sTag: 0x%x ('%s')\n", buf, e->tag,
+		exif_tag_get_name_in_ifd (e->tag, exif_entry_get_ifd(e)));
+	printf ("%s  Format: %i ('%s')\n", buf, e->format,
+		exif_format_get_name (e->format));
+	printf ("%s  Components: %i\n", buf, (int) e->components);
+	printf ("%s  Size: %i\n", buf, e->size);
+	printf ("%s  Value: %s\n", buf, exif_entry_get_value (e, value, sizeof(value)));
+}
+
+#define CF(entry,target,v,maxlen)					\
+{									\
+	if (entry->format != target) {					\
+		exif_entry_log (entry, EXIF_LOG_CODE_CORRUPT_DATA,	\
+			_("The tag '%s' contains data of an invalid "	\
+			"format ('%s', expected '%s')."),		\
+			exif_tag_get_name (entry->tag),			\
+			exif_format_get_name (entry->format),		\
+			exif_format_get_name (target));			\
+		break;							\
+	}								\
+}
+
+#define CC(entry,target,v,maxlen)					\
+{									\
+	if (entry->components != target) {				\
+		exif_entry_log (entry, EXIF_LOG_CODE_CORRUPT_DATA,	\
+			_("The tag '%s' contains an invalid number of "	\
+			  "components (%i, expected %i)."),		\
+			exif_tag_get_name (entry->tag),		\
+			(int) entry->components, (int) target);		\
+		break;							\
+	}								\
+}
+
+static const struct {
+	ExifTag tag;
+	const char *strings[10];
+} list[] = {
+#ifndef NO_VERBOSE_TAG_DATA
+  { EXIF_TAG_PLANAR_CONFIGURATION,
+    { N_("Chunky format"), N_("Planar format"), NULL}},
+  { EXIF_TAG_SENSING_METHOD,
+    { "", N_("Not defined"), N_("One-chip color area sensor"),
+      N_("Two-chip color area sensor"), N_("Three-chip color area sensor"),
+      N_("Color sequential area sensor"), "", N_("Trilinear sensor"),
+      N_("Color sequential linear sensor"), NULL}},
+  { EXIF_TAG_ORIENTATION,
+    { "", N_("Top-left"), N_("Top-right"), N_("Bottom-right"),
+      N_("Bottom-left"), N_("Left-top"), N_("Right-top"),
+      N_("Right-bottom"), N_("Left-bottom"), NULL}},
+  { EXIF_TAG_YCBCR_POSITIONING,
+    { "", N_("Centered"), N_("Co-sited"), NULL}},
+  { EXIF_TAG_PHOTOMETRIC_INTERPRETATION,
+    { N_("Reversed mono"), N_("Normal mono"), N_("RGB"), N_("Palette"), "",
+      N_("CMYK"), N_("YCbCr"), "", N_("CieLAB"), NULL}},
+  { EXIF_TAG_CUSTOM_RENDERED,
+    { N_("Normal process"), N_("Custom process"), NULL}},
+  { EXIF_TAG_EXPOSURE_MODE,
+    { N_("Auto exposure"), N_("Manual exposure"), N_("Auto bracket"), NULL}},
+  { EXIF_TAG_WHITE_BALANCE,
+    { N_("Auto white balance"), N_("Manual white balance"), NULL}},
+  { EXIF_TAG_SCENE_CAPTURE_TYPE,
+    { N_("Standard"), N_("Landscape"), N_("Portrait"),
+      N_("Night scene"), NULL}},
+  { EXIF_TAG_GAIN_CONTROL,
+    { N_("Normal"), N_("Low gain up"), N_("High gain up"),
+      N_("Low gain down"), N_("High gain down"), NULL}},
+  { EXIF_TAG_SATURATION,
+    { N_("Normal"), N_("Low saturation"), N_("High saturation"), NULL}},
+  { EXIF_TAG_CONTRAST , {N_("Normal"), N_("Soft"), N_("Hard"), NULL}},
+  { EXIF_TAG_SHARPNESS, {N_("Normal"), N_("Soft"), N_("Hard"), NULL}},
+#endif
+  { 0, {NULL}}
+};
+
+static const struct {
+  ExifTag tag;
+  struct {
+    int index;
+    const char *values[4]; /*!< list of progressively shorter string
+			    descriptions; the longest one that fits will be
+			    selected */
+  } elem[25];
+} list2[] = {
+#ifndef NO_VERBOSE_TAG_DATA
+  { EXIF_TAG_METERING_MODE,
+    { {  0, {N_("Unknown"), NULL}},
+      {  1, {N_("Average"), N_("Avg"), NULL}},
+      {  2, {N_("Center-weighted average"), N_("Center-weight"), NULL}},
+      {  3, {N_("Spot"), NULL}},
+      {  4, {N_("Multi spot"), NULL}},
+      {  5, {N_("Pattern"), NULL}},
+      {  6, {N_("Partial"), NULL}},
+      {255, {N_("Other"), NULL}},
+      {  0, {NULL}}}},
+  { EXIF_TAG_COMPRESSION,
+    { {1, {N_("Uncompressed"), NULL}},
+      {5, {N_("LZW compression"), NULL}},
+      {6, {N_("JPEG compression"), NULL}},
+      {7, {N_("JPEG compression"), NULL}},
+      {8, {N_("Deflate/ZIP compression"), NULL}},
+      {32773, {N_("PackBits compression"), NULL}},
+      {0, {NULL}}}},
+  { EXIF_TAG_LIGHT_SOURCE,
+    { {  0, {N_("Unknown"), NULL}},
+      {  1, {N_("Daylight"), NULL}},
+      {  2, {N_("Fluorescent"), NULL}},
+      {  3, {N_("Tungsten incandescent light"), N_("Tungsten"), NULL}},
+      {  4, {N_("Flash"), NULL}},
+      {  9, {N_("Fine weather"), NULL}},
+      { 10, {N_("Cloudy weather"), N_("Cloudy"), NULL}},
+      { 11, {N_("Shade"), NULL}},
+      { 12, {N_("Daylight fluorescent"), NULL}},
+      { 13, {N_("Day white fluorescent"), NULL}},
+      { 14, {N_("Cool white fluorescent"), NULL}},
+      { 15, {N_("White fluorescent"), NULL}},
+      { 17, {N_("Standard light A"), NULL}},
+      { 18, {N_("Standard light B"), NULL}},
+      { 19, {N_("Standard light C"), NULL}},
+      { 20, {N_("D55"), NULL}},
+      { 21, {N_("D65"), NULL}},
+      { 22, {N_("D75"), NULL}},
+      { 24, {N_("ISO studio tungsten"),NULL}},
+      {255, {N_("Other"), NULL}},
+      {  0, {NULL}}}},
+  { EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT,
+    { {2, {N_("Inch"), N_("in"), NULL}},
+      {3, {N_("Centimeter"), N_("cm"), NULL}},
+      {0, {NULL}}}},
+  { EXIF_TAG_RESOLUTION_UNIT,
+    { {2, {N_("Inch"), N_("in"), NULL}},
+      {3, {N_("Centimeter"), N_("cm"), NULL}}, 
+      {0, {NULL}}}},
+  { EXIF_TAG_EXPOSURE_PROGRAM,
+    { {0, {N_("Not defined"), NULL}},
+      {1, {N_("Manual"), NULL}},
+      {2, {N_("Normal program"), N_("Normal"), NULL}},
+      {3, {N_("Aperture priority"), N_("Aperture"), NULL}},
+      {4, {N_("Shutter priority"),N_("Shutter"), NULL}},
+      {5, {N_("Creative program (biased toward depth of field)"),
+	   N_("Creative"), NULL}},
+      {6, {N_("Creative program (biased toward fast shutter speed)"),
+	   N_("Action"), NULL}},
+      {7, {N_("Portrait mode (for closeup photos with the background out "
+	      "of focus)"), N_("Portrait"), NULL}},
+      {8, {N_("Landscape mode (for landscape photos with the background "
+	      "in focus)"), N_("Landscape"), NULL}},
+      {0, {NULL}}}},
+  { EXIF_TAG_FLASH,
+    { {0x0000, {N_("Flash did not fire"), N_("No flash"), NULL}},
+      {0x0001, {N_("Flash fired"), N_("Flash"), N_("Yes"), NULL}},
+      {0x0005, {N_("Strobe return light not detected"), N_("Without strobe"),
+		NULL}},
+      {0x0007, {N_("Strobe return light detected"), N_("With strobe"), NULL}},
+      {0x0008, {N_("Flash did not fire"), NULL}}, /* Olympus E-330 */
+      {0x0009, {N_("Flash fired, compulsory flash mode"), NULL}},
+      {0x000d, {N_("Flash fired, compulsory flash mode, return light "
+		   "not detected"), NULL}},
+      {0x000f, {N_("Flash fired, compulsory flash mode, return light "
+		   "detected"), NULL}},
+      {0x0010, {N_("Flash did not fire, compulsory flash mode"), NULL}},
+      {0x0018, {N_("Flash did not fire, auto mode"), NULL}},
+      {0x0019, {N_("Flash fired, auto mode"), NULL}},
+      {0x001d, {N_("Flash fired, auto mode, return light not detected"),
+		NULL}},
+      {0x001f, {N_("Flash fired, auto mode, return light detected"), NULL}},
+      {0x0020, {N_("No flash function"),NULL}},
+      {0x0041, {N_("Flash fired, red-eye reduction mode"), NULL}},
+      {0x0045, {N_("Flash fired, red-eye reduction mode, return light "
+		   "not detected"), NULL}},
+      {0x0047, {N_("Flash fired, red-eye reduction mode, return light "
+		   "detected"), NULL}},
+      {0x0049, {N_("Flash fired, compulsory flash mode, red-eye reduction "
+		   "mode"), NULL}},
+      {0x004d, {N_("Flash fired, compulsory flash mode, red-eye reduction "
+		  "mode, return light not detected"), NULL}},
+      {0x004f, {N_("Flash fired, compulsory flash mode, red-eye reduction mode, "
+		   "return light detected"), NULL}},
+      {0x0058, {N_("Flash did not fire, auto mode, red-eye reduction mode"), NULL}},
+      {0x0059, {N_("Flash fired, auto mode, red-eye reduction mode"), NULL}},
+      {0x005d, {N_("Flash fired, auto mode, return light not detected, "
+		   "red-eye reduction mode"), NULL}},
+      {0x005f, {N_("Flash fired, auto mode, return light detected, "
+		   "red-eye reduction mode"), NULL}},
+      {0x0000, {NULL}}}},
+  { EXIF_TAG_SUBJECT_DISTANCE_RANGE, 
+    { {0, {N_("Unknown"), N_("?"), NULL}},
+      {1, {N_("Macro"), NULL}},
+      {2, {N_("Close view"), N_("Close"), NULL}},
+      {3, {N_("Distant view"), N_("Distant"), NULL}},
+      {0, {NULL}}}},
+  { EXIF_TAG_COLOR_SPACE,
+    { {1, {N_("sRGB"), NULL}},
+      {2, {N_("Adobe RGB"), NULL}},
+      {0xffff, {N_("Uncalibrated"), NULL}},
+      {0x0000, {NULL}}}},
+#endif
+  {0, { { 0, {NULL}}} }
+};
+
+const char *
+exif_entry_get_value (ExifEntry *e, char *val, unsigned int maxlen)
+{
+	unsigned int i, j, k;
+	const unsigned char *t;
+	ExifShort v_short, v_short2, v_short3, v_short4;
+	ExifByte v_byte;
+	ExifRational v_rat;
+	ExifSRational v_srat;
+	char b[64];
+	const char *c;
+	ExifByteOrder o;
+	double d;
+	ExifEntry *entry;
+	static const struct {
+		char label[5];
+		char major, minor;
+	} versions[] = {
+		{"0110", 1,  1},
+		{"0120", 1,  2},
+		{"0200", 2,  0},
+		{"0210", 2,  1},
+		{"0220", 2,  2},
+		{"0221", 2, 21},
+		{""    , 0,  0}
+	};
+
+	/* FIXME: This belongs to somewhere else. */
+	/* libexif should use the default system locale.
+	 * If an application specifically requires UTF-8, then we
+	 * must give the application a way to tell libexif that.
+	 * 
+	 * bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
+	 */
+#if defined(BIND_TEXTDOMAIN)
+	bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
+#endif
+
+	/* make sure the returned string is zero terminated */
+	memset (val, 0, maxlen);
+	maxlen--;
+	memset (b, 0, sizeof (b));
+
+	/* We need the byte order */
+	if (!e || !e->parent || !e->parent->parent)
+		return val;
+	o = exif_data_get_byte_order (e->parent->parent);
+
+	/* Sanity check */
+	if (e->size != e->components * exif_format_get_size (e->format)) {
+		snprintf (val, maxlen, _("Invalid size of entry (%i, "
+			"expected %li x %i)."), e->size, e->components,
+				exif_format_get_size (e->format));
+		return val;
+	}
+
+	switch (e->tag) {
+	case EXIF_TAG_USER_COMMENT:
+
+		/*
+		 * The specification says UNDEFINED, but some
+		 * manufacturers don't care and use ASCII. If this is the
+		 * case here, only refuse to read it if there is no chance
+		 * of finding readable data.
+		 */
+		if ((e->format != EXIF_FORMAT_ASCII) || 
+		    (e->size <= 8) ||
+		    ( memcmp (e->data, "ASCII\0\0\0"  , 8) &&
+		      memcmp (e->data, "UNICODE\0"    , 8) &&
+		      memcmp (e->data, "JIS\0\0\0\0\0", 8) &&
+		      memcmp (e->data, "\0\0\0\0\0\0\0\0", 8)))
+			CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen);
+
+		/*
+		 * Note that, according to the specification (V2.1, p 40),
+		 * the user comment field does not have to be 
+		 * NULL terminated.
+		 */
+		if ((e->size >= 8) && !memcmp (e->data, "ASCII\0\0\0", 8)) {
+			strncpy (val, (char *) e->data + 8, MIN (e->size - 8, maxlen));
+			break;
+		}
+		if ((e->size >= 8) && !memcmp (e->data, "UNICODE\0", 8)) {
+			strncpy (val, _("Unsupported UNICODE string"), maxlen);
+		/* FIXME: use iconv to convert into the locale encoding.
+		 * EXIF 2.2 implies (but does not say) that this encoding is
+		 * UCS-2.
+		 */
+			break;
+		}
+		if ((e->size >= 8) && !memcmp (e->data, "JIS\0\0\0\0\0", 8)) {
+			strncpy (val, _("Unsupported JIS string"), maxlen);
+		/* FIXME: use iconv to convert into the locale encoding */
+			break;
+		}
+
+		/* Check if there is really some information in the tag. */
+		for (i = 0; (i < e->size) &&
+			    (!e->data[i] || (e->data[i] == ' ')); i++);
+		if (i == e->size) break;
+
+		/*
+		 * If we reach this point, the tag does not
+		 * comply with the standard and seems to contain data.
+		 * Print as much as possible.
+		 */
+		exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+			_("Tag UserComment does not comply "
+			"with standard but contains data."));
+		for (; (i < e->size)  && (strlen (val) < maxlen - 1); i++) {
+			exif_entry_log (e, EXIF_LOG_CODE_DEBUG,
+				_("Byte at position %i: 0x%02x"), i, e->data[i]);
+			val[strlen (val)] =
+				isprint (e->data[i]) ? e->data[i] : '.';
+		}
+		break;
+
+	case EXIF_TAG_EXIF_VERSION:
+		CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen);
+		CC (e, 4, val, maxlen);
+		strncpy (val, _("Unknown Exif Version"), maxlen);
+		for (i = 0; *versions[i].label; i++) {
+			if (!memcmp (e->data, versions[i].label, 4)) {
+    				snprintf (val, maxlen,
+					_("Exif Version %d.%d"),
+					versions[i].major,
+					versions[i].minor);
+    				break;
+			}
+		}
+		break;
+	case EXIF_TAG_FLASH_PIX_VERSION:
+		CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen);
+		CC (e, 4, val, maxlen);
+		if (!memcmp (e->data, "0100", 4))
+			strncpy (val, _("FlashPix Version 1.0"), maxlen);
+		else if (!memcmp (e->data, "0101", 4))
+			strncpy (val, _("FlashPix Version 1.01"), maxlen);
+		else
+			strncpy (val, _("Unknown FlashPix Version"), maxlen);
+		break;
+	case EXIF_TAG_COPYRIGHT:
+		CF (e, EXIF_FORMAT_ASCII, val, maxlen);
+
+		/*
+		 * First part: Photographer.
+		 * Some cameras store a string like "   " here. Ignore it.
+		 */
+		if (e->size && e->data &&
+		    (strspn ((char *)e->data, " ") != strlen ((char *) e->data)))
+			strncpy (val, (char *) e->data, MIN (maxlen, e->size));
+		else
+			strncpy (val, _("[None]"), maxlen);
+		strncat (val, " ", maxlen - strlen (val));
+		strncat (val, _("(Photographer)"), maxlen - strlen (val));
+
+		/* Second part: Editor. */
+		strncat (val, " - ", maxlen - strlen (val));
+		if (e->size && e->data) {
+			size_t ts;
+			t = e->data + strlen ((char *) e->data) + 1;
+			ts = e->data + e->size - t;
+			if ((ts > 0) && (strspn ((char *)t, " ") != ts))
+				strncat (val, (char *)t, MIN (maxlen - strlen (val), ts));
+		} else {
+			strncat (val, _("[None]"), maxlen - strlen (val));
+		}
+		strncat (val, " ", maxlen - strlen (val));
+		strncat (val, _("(Editor)"), maxlen - strlen (val));
+
+		break;
+	case EXIF_TAG_FNUMBER:
+		CF (e, EXIF_FORMAT_RATIONAL, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_rat = exif_get_rational (e->data, o);
+		if (!v_rat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		d = (double) v_rat.numerator / (double) v_rat.denominator;
+		snprintf (val, maxlen, "f/%.01f", d);
+		break;
+	case EXIF_TAG_APERTURE_VALUE:
+	case EXIF_TAG_MAX_APERTURE_VALUE:
+		CF (e, EXIF_FORMAT_RATIONAL, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_rat = exif_get_rational (e->data, o);
+		if (!v_rat.denominator || (0x80000000 == v_rat.numerator)) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		d = (double) v_rat.numerator / (double) v_rat.denominator;
+		snprintf (val, maxlen, _("%.02f EV"), d);
+		snprintf (b, sizeof (b), _(" (f/%.01f)"), pow (2, d / 2.));
+		if (maxlen > strlen (val) + strlen (b))
+			strncat (val, b, maxlen - strlen (val));
+		break;
+	case EXIF_TAG_FOCAL_LENGTH:
+		CF (e, EXIF_FORMAT_RATIONAL, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_rat = exif_get_rational (e->data, o);
+		if (!v_rat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+
+		/*
+		 * For calculation of the 35mm equivalent,
+		 * Minolta cameras need a multiplier that depends on the
+		 * camera model.
+		 */
+		d = 0.;
+		entry = exif_content_get_entry (
+			e->parent->parent->ifd[EXIF_IFD_0], EXIF_TAG_MAKE);
+		if (entry && entry->data &&
+		    !strncmp ((char *)entry->data, "Minolta", 7)) {
+			entry = exif_content_get_entry (
+					e->parent->parent->ifd[EXIF_IFD_0],
+					EXIF_TAG_MODEL);
+			if (entry && entry->data) {
+				if (!strncmp ((char *)entry->data, "DiMAGE 7", 8))
+					d = 3.9;
+				else if (!strncmp ((char *)entry->data, "DiMAGE 5", 8))
+					d = 4.9;
+			}
+		}
+		if (d)
+			snprintf (b, sizeof (b), _(" (35 equivalent: %d mm)"),
+				  (int) (d * (double) v_rat.numerator /
+				  	     (double) v_rat.denominator));
+
+		d = (double) v_rat.numerator / (double) v_rat.denominator;
+		snprintf (val, maxlen, "%.1f mm", d);
+		if (maxlen > strlen (val) + strlen (b))
+			strncat (val, b, maxlen - strlen (val));
+		break;
+	case EXIF_TAG_SUBJECT_DISTANCE:
+		CF (e, EXIF_FORMAT_RATIONAL, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_rat = exif_get_rational (e->data, o);
+		if (!v_rat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		d = (double) v_rat.numerator / (double) v_rat.denominator;
+		snprintf (val, maxlen, "%.1f m", d);
+		break;
+	case EXIF_TAG_EXPOSURE_TIME:
+		CF (e, EXIF_FORMAT_RATIONAL, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_rat = exif_get_rational (e->data, o);
+		if (!v_rat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		d = (double) v_rat.numerator / (double) v_rat.denominator;
+		if (d < 1)
+			snprintf (val, maxlen, _("1/%i"), (int) (0.5 + 1. / d));
+		else
+			snprintf (val, maxlen, "%i", (int) d);
+		if (maxlen > strlen (val) + strlen (_(" sec.")))
+			strncat (val, _(" sec."), maxlen - strlen (val));
+		break;
+	case EXIF_TAG_SHUTTER_SPEED_VALUE:
+		CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_srat = exif_get_srational (e->data, o);
+		if (!v_srat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		d = (double) v_srat.numerator / (double) v_srat.denominator;
+		snprintf (val, maxlen, _("%.02f EV"), d);
+		d = 1. / pow (2, d);
+		if (d < 1)
+		  snprintf (b, sizeof (b), _(" (1/%d sec.)"), (int) (1. / d));
+		else
+		  snprintf (b, sizeof (b), _(" (%d sec.)"), (int) d);
+		strncat (val, b, maxlen - strlen (val));
+		break;
+	case EXIF_TAG_BRIGHTNESS_VALUE:
+		CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_srat = exif_get_srational (e->data, o);
+		if (!v_srat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		d = (double) v_srat.numerator / (double) v_srat.denominator;
+		snprintf (val, maxlen, _("%.02f EV"), d);
+		snprintf (b, sizeof (b), _(" (%.02f cd/m^2)"),
+			1. / (M_PI * 0.3048 * 0.3048) * pow (2, d));
+		if (maxlen > strlen (val) + strlen (b))
+			strncat (val, b, maxlen - strlen (val));
+		break;
+	case EXIF_TAG_FILE_SOURCE:
+		CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_byte = e->data[0];
+		if (v_byte == 3)
+			strncpy (val, _("DSC"), maxlen);
+		else
+			snprintf (val, maxlen, _("Internal error (unknown "
+				  "value %i)"), v_byte);
+		break;
+	case EXIF_TAG_COMPONENTS_CONFIGURATION:
+		CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen);
+		CC (e, 4, val, maxlen);
+		for (i = 0; i < 4; i++) {
+			switch (e->data[i]) {
+			case 0: c = _("-"); break;
+			case 1: c = _("Y"); break;
+			case 2: c = _("Cb"); break;
+			case 3: c = _("Cr"); break;
+			case 4: c = _("R"); break;
+			case 5: c = _("G"); break;
+			case 6: c = _("B"); break;
+			default: c = _("Reserved"); break;
+			}
+			strncat (val, c, maxlen - strlen (val));
+			if (i < 3)
+				strncat (val, " ", maxlen - strlen (val));
+		}
+		break;
+	case EXIF_TAG_EXPOSURE_BIAS_VALUE:
+		CF (e, EXIF_FORMAT_SRATIONAL, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_srat = exif_get_srational (e->data, o);
+		if (!v_srat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		d = (double) v_srat.numerator / (double) v_srat.denominator;
+		snprintf (val, maxlen, _("%.02f EV"), d);
+		break;
+	case EXIF_TAG_SCENE_TYPE:
+		CF (e, EXIF_FORMAT_UNDEFINED, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_byte = e->data[0];
+		if (v_byte == 1)
+			strncpy (val, _("Directly photographed"), maxlen);
+		else
+			snprintf (val, maxlen, _("Internal error (unknown "
+				  "value %i)"), v_byte);
+		break;
+	case EXIF_TAG_YCBCR_SUB_SAMPLING:
+		CF (e, EXIF_FORMAT_SHORT, val, maxlen);
+		CC (e, 2, val, maxlen);
+		v_short  = exif_get_short (e->data, o);
+		v_short2 = exif_get_short (
+			e->data + exif_format_get_size (e->format),
+			o);
+		if ((v_short == 2) && (v_short2 == 1))
+			strncpy (val, _("YCbCr4:2:2"), maxlen);
+		else if ((v_short == 2) && (v_short2 == 2))
+			strncpy (val, _("YCbCr4:2:0"), maxlen);
+		else
+			snprintf (val, maxlen, "%u, %u", v_short, v_short2);
+		break;
+	case EXIF_TAG_SUBJECT_AREA:
+		CF (e, EXIF_FORMAT_SHORT, val, maxlen);
+		switch (e->components) {
+		case 2:
+			v_short  = exif_get_short (e->data, o);
+			v_short2 = exif_get_short (e->data + 2, o);
+			snprintf (val, maxlen, "(x,y) = (%i,%i)",
+				  v_short, v_short2);
+			break;
+		case 3:
+			v_short  = exif_get_short (e->data, o);
+			v_short2 = exif_get_short (e->data + 2, o);
+			v_short3 = exif_get_short (e->data + 4, o);
+			snprintf (val, maxlen, _("Within distance %i of "
+				"(x,y) = (%i,%i)"), v_short3, v_short,
+				v_short2);
+			break;
+		case 4:
+			v_short  = exif_get_short (e->data, o);
+			v_short2 = exif_get_short (e->data + 2, o);
+			v_short3 = exif_get_short (e->data + 4, o);
+			v_short4 = exif_get_short (e->data + 6, o);
+			snprintf (val, maxlen, _("Within rectangle "
+				"(width %i, height %i) around "
+				"(x,y) = (%i,%i)"), v_short3, v_short4,
+				v_short, v_short2);
+			break;
+		default:
+			snprintf (val, maxlen, _("Unexpected number "
+				"of components (%li, expected 2, 3, or 4)."),
+				e->components);	
+		}
+		break;
+	case EXIF_TAG_GPS_VERSION_ID:
+		/* This is only valid in the GPS IFD */
+		CF (e, EXIF_FORMAT_BYTE, val, maxlen);
+		CC (e, 4, val, maxlen);
+		v_byte = e->data[0];
+		snprintf (val, maxlen, "%u", v_byte);
+		maxlen -= strlen (val);
+		for (i = 1; i < e->components; i++) {
+			v_byte = e->data[i];
+			snprintf (b, sizeof (b), ".%u", v_byte);
+			strncat (val, b, maxlen);
+			maxlen -= strlen (b);
+			if ((signed)maxlen <= 0) break;
+		}
+		break;
+	case EXIF_TAG_INTEROPERABILITY_VERSION:
+	/* a.k.a. case EXIF_TAG_GPS_LATITUDE: */
+		/* This tag occurs in EXIF_IFD_INTEROPERABILITY */
+		if (e->format == EXIF_FORMAT_UNDEFINED) {
+			strncpy (val, (char *) e->data, MIN (maxlen, e->size));
+			break;
+		}
+		/* EXIF_TAG_GPS_LATITUDE is the same numerically as
+		 * EXIF_TAG_INTEROPERABILITY_VERSION but in EXIF_IFD_GPS
+		 */
+		exif_entry_format_value(e, val, maxlen);
+		break;
+	case EXIF_TAG_GPS_ALTITUDE_REF:
+		/* This is only valid in the GPS IFD */
+		CF (e, EXIF_FORMAT_BYTE, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_byte = e->data[0];
+		if (v_byte == 0)
+			strncpy (val, _("Sea level"), maxlen);
+		else if (v_byte == 1)
+			strncpy (val, _("Sea level reference"), maxlen);
+		else
+			snprintf (val, maxlen, _("Internal error (unknown "
+				  "value %i)"), v_byte);
+		break;
+	case EXIF_TAG_GPS_TIME_STAMP:
+		/* This is only valid in the GPS IFD */
+		CF (e, EXIF_FORMAT_RATIONAL, val, maxlen);
+		CC (e, 3, val, maxlen);
+
+		v_rat  = exif_get_rational (e->data, o);
+		if (!v_rat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		i = v_rat.numerator / v_rat.denominator;
+
+		v_rat = exif_get_rational (e->data +
+					     exif_format_get_size (e->format),
+					   o);
+		if (!v_rat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		j = v_rat.numerator / v_rat.denominator;
+
+		v_rat = exif_get_rational (e->data +
+					     2*exif_format_get_size (e->format),
+					     o);
+		if (!v_rat.denominator) {
+			exif_entry_format_value(e, val, maxlen);
+			break;
+		}
+		d = (double) v_rat.numerator / (double) v_rat.denominator;
+		snprintf (val, maxlen, "%02u:%02u:%05.2f", i, j, d);
+		break;
+
+	case EXIF_TAG_METERING_MODE:
+	case EXIF_TAG_COMPRESSION:
+	case EXIF_TAG_LIGHT_SOURCE:
+	case EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT:
+	case EXIF_TAG_RESOLUTION_UNIT:
+	case EXIF_TAG_EXPOSURE_PROGRAM:
+	case EXIF_TAG_FLASH:
+	case EXIF_TAG_SUBJECT_DISTANCE_RANGE:
+	case EXIF_TAG_COLOR_SPACE:
+		CF (e,EXIF_FORMAT_SHORT, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_short = exif_get_short (e->data, o);
+
+		/* Search the tag */
+		for (i = 0; list2[i].tag && (list2[i].tag != e->tag); i++);
+		if (!list2[i].tag) {
+			snprintf (val, maxlen, _("Internal error (unknown "
+				  "value %i)"), v_short);
+			break;
+		}
+
+		/* Find the value */
+		for (j = 0; list2[i].elem[j].values[0] &&
+			    (list2[i].elem[j].index < v_short); j++);
+		if (list2[i].elem[j].index != v_short) {
+			snprintf (val, maxlen, _("Internal error (unknown "
+				  "value %i)"), v_short);
+			break;
+		}
+
+		/* Find a short enough value */
+		memset (val, 0, maxlen);
+		for (k = 0; list2[i].elem[j].values[k]; k++) {
+			size_t l = strlen (_(list2[i].elem[j].values[k]));
+			if ((maxlen > l) && (strlen (val) < l))
+				strncpy (val, _(list2[i].elem[j].values[k]), maxlen);
+		}
+		if (!val[0]) snprintf (val, maxlen, "%i", v_short);
+
+		break;
+
+	case EXIF_TAG_PLANAR_CONFIGURATION:
+	case EXIF_TAG_SENSING_METHOD:
+	case EXIF_TAG_ORIENTATION:
+	case EXIF_TAG_YCBCR_POSITIONING:
+	case EXIF_TAG_PHOTOMETRIC_INTERPRETATION:
+	case EXIF_TAG_CUSTOM_RENDERED:
+	case EXIF_TAG_EXPOSURE_MODE:
+	case EXIF_TAG_WHITE_BALANCE:
+	case EXIF_TAG_SCENE_CAPTURE_TYPE:
+	case EXIF_TAG_GAIN_CONTROL:
+	case EXIF_TAG_SATURATION:
+	case EXIF_TAG_CONTRAST:
+	case EXIF_TAG_SHARPNESS:
+		CF (e, EXIF_FORMAT_SHORT, val, maxlen);
+		CC (e, 1, val, maxlen);
+		v_short = exif_get_short (e->data, o);
+
+		/* Search the tag */
+		for (i = 0; list[i].tag && (list[i].tag != e->tag); i++);
+		if (!list[i].tag) {
+			snprintf (val, maxlen, _("Internal error (unknown "
+				  "value %i)"), v_short);
+			break;
+		}
+
+		/* Find the value */
+		for (j = 0; list[i].strings[j] && (j < v_short); j++);
+		if (!list[i].strings[j])
+			snprintf (val, maxlen, "%i", v_short);
+		else if (!*list[i].strings[j])
+			snprintf (val, maxlen, _("Unknown value %i"), v_short);
+		else
+			strncpy (val, _(list[i].strings[j]), maxlen);
+		break;
+
+	case EXIF_TAG_XP_TITLE:
+	case EXIF_TAG_XP_COMMENT:
+	case EXIF_TAG_XP_AUTHOR:
+	case EXIF_TAG_XP_KEYWORDS:
+	case EXIF_TAG_XP_SUBJECT:
+		/* Warning! The texts are converted from UTF16 to UTF8 */
+		/* FIXME: use iconv to convert into the locale encoding */
+		exif_convert_utf16_to_utf8(val, (unsigned short*)e->data, MIN(maxlen, e->size));
+		break;
+
+	default:
+		/* Use a generic value formatting */
+		exif_entry_format_value(e, val, maxlen);
+	}
+
+	return val;
+}
+
+
+/*!
+ * \bug Log and report failed exif_mem_malloc() calls.
+ */
+void
+exif_entry_initialize (ExifEntry *e, ExifTag tag)
+{
+	ExifRational r;
+	ExifByteOrder o;
+
+	/* We need the byte order */
+	if (!e || !e->parent || e->data || !e->parent->parent)
+		return;
+	o = exif_data_get_byte_order (e->parent->parent);
+
+	e->tag = tag;
+	switch (tag) {
+
+	/* LONG, 1 component, no default */
+	case EXIF_TAG_PIXEL_X_DIMENSION:
+	case EXIF_TAG_PIXEL_Y_DIMENSION:
+	case EXIF_TAG_EXIF_IFD_POINTER:
+	case EXIF_TAG_GPS_INFO_IFD_POINTER:
+	case EXIF_TAG_INTEROPERABILITY_IFD_POINTER:
+	case EXIF_TAG_JPEG_INTERCHANGE_FORMAT_LENGTH:
+	case EXIF_TAG_JPEG_INTERCHANGE_FORMAT:
+		e->components = 1;
+		e->format = EXIF_FORMAT_LONG;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		break;
+
+	/* SHORT, 1 component, no default */
+	case EXIF_TAG_SUBJECT_LOCATION:
+	case EXIF_TAG_SENSING_METHOD:
+	case EXIF_TAG_PHOTOMETRIC_INTERPRETATION:
+	case EXIF_TAG_COMPRESSION:
+	case EXIF_TAG_EXPOSURE_MODE:
+	case EXIF_TAG_WHITE_BALANCE:
+	case EXIF_TAG_FOCAL_LENGTH_IN_35MM_FILM:
+	case EXIF_TAG_GAIN_CONTROL:
+	case EXIF_TAG_SUBJECT_DISTANCE_RANGE:
+	case EXIF_TAG_FLASH:
+	case EXIF_TAG_ISO_SPEED_RATINGS:
+
+	/* SHORT, 1 component, default 0 */
+	case EXIF_TAG_IMAGE_WIDTH:
+	case EXIF_TAG_IMAGE_LENGTH:
+	case EXIF_TAG_EXPOSURE_PROGRAM:
+	case EXIF_TAG_LIGHT_SOURCE:
+	case EXIF_TAG_METERING_MODE:
+	case EXIF_TAG_CUSTOM_RENDERED:
+	case EXIF_TAG_SCENE_CAPTURE_TYPE:
+	case EXIF_TAG_CONTRAST:
+	case EXIF_TAG_SATURATION:
+	case EXIF_TAG_SHARPNESS:
+		e->components = 1;
+		e->format = EXIF_FORMAT_SHORT;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		exif_set_short (e->data, o, 0);
+		break;
+
+	/* SHORT, 1 component, default 1 */
+	case EXIF_TAG_ORIENTATION:
+	case EXIF_TAG_PLANAR_CONFIGURATION:
+	case EXIF_TAG_YCBCR_POSITIONING:
+		e->components = 1;
+		e->format = EXIF_FORMAT_SHORT;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		exif_set_short (e->data, o, 1);
+		break;
+
+	/* SHORT, 1 component, default 2 */
+	case EXIF_TAG_RESOLUTION_UNIT:
+	case EXIF_TAG_FOCAL_PLANE_RESOLUTION_UNIT:
+		e->components = 1;
+		e->format = EXIF_FORMAT_SHORT;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		exif_set_short (e->data, o, 2);
+		break;
+
+	/* SHORT, 1 component, default 3 */
+	case EXIF_TAG_SAMPLES_PER_PIXEL:
+		e->components = 1;
+		e->format = EXIF_FORMAT_SHORT;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		exif_set_short (e->data, o, 3);
+		break;
+
+	/* SHORT, 1 component, default 0xffff */
+	case EXIF_TAG_COLOR_SPACE:
+		e->components = 1;
+		e->format = EXIF_FORMAT_SHORT;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		exif_set_short (e->data, o, 0xffff);
+		break;
+
+	/* SHORT, 3 components, default 8 8 8 */
+	case EXIF_TAG_BITS_PER_SAMPLE:
+		e->components = 3;
+		e->format = EXIF_FORMAT_SHORT;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		exif_set_short (e->data, o, 8);
+		exif_set_short (
+			e->data + exif_format_get_size (e->format),
+			o, 8);
+		exif_set_short (
+			e->data + 2 * exif_format_get_size (e->format),
+			o, 8);
+		break;
+
+	/* SHORT, 2 components, default 2 1 */
+	case EXIF_TAG_YCBCR_SUB_SAMPLING:
+		e->components = 2;
+		e->format = EXIF_FORMAT_SHORT;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		exif_set_short (e->data, o, 2);
+		exif_set_short (
+			e->data + exif_format_get_size (e->format),
+			o, 1);
+		break;
+
+	/* SRATIONAL, 1 component, no default */
+	case EXIF_TAG_EXPOSURE_BIAS_VALUE:
+	case EXIF_TAG_BRIGHTNESS_VALUE:
+	case EXIF_TAG_SHUTTER_SPEED_VALUE:
+		e->components = 1;
+		e->format = EXIF_FORMAT_SRATIONAL;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		break;
+
+	/* RATIONAL, 1 component, no default */
+	case EXIF_TAG_EXPOSURE_TIME:
+	case EXIF_TAG_FOCAL_PLANE_X_RESOLUTION:
+	case EXIF_TAG_FOCAL_PLANE_Y_RESOLUTION:
+	case EXIF_TAG_EXPOSURE_INDEX:
+	case EXIF_TAG_FLASH_ENERGY:
+	case EXIF_TAG_FNUMBER:
+	case EXIF_TAG_FOCAL_LENGTH:
+	case EXIF_TAG_SUBJECT_DISTANCE:
+	case EXIF_TAG_MAX_APERTURE_VALUE:
+	case EXIF_TAG_APERTURE_VALUE:
+	case EXIF_TAG_COMPRESSED_BITS_PER_PIXEL:
+	case EXIF_TAG_PRIMARY_CHROMATICITIES:
+	case EXIF_TAG_DIGITAL_ZOOM_RATIO:
+		e->components = 1;
+		e->format = EXIF_FORMAT_RATIONAL;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		break;
+
+	/* RATIONAL, 1 component, default 72/1 */
+	case EXIF_TAG_X_RESOLUTION:
+	case EXIF_TAG_Y_RESOLUTION:
+		e->components = 1;
+		e->format = EXIF_FORMAT_RATIONAL;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		r.numerator = 72;
+		r.denominator = 1;
+		exif_set_rational (e->data, o, r);
+		break;
+
+	/* RATIONAL, 2 components, no default */
+	case EXIF_TAG_WHITE_POINT:
+		e->components = 2;
+		e->format = EXIF_FORMAT_RATIONAL;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		break;
+
+	/* RATIONAL, 6 components */
+	case EXIF_TAG_REFERENCE_BLACK_WHITE:
+		e->components = 6;
+		e->format = EXIF_FORMAT_RATIONAL;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		r.denominator = 1;
+		r.numerator = 0;
+		exif_set_rational (e->data, o, r);
+		r.numerator = 255;
+		exif_set_rational (
+			e->data + exif_format_get_size (e->format), o, r);
+		r.numerator = 0;
+		exif_set_rational (
+			e->data + 2 * exif_format_get_size (e->format), o, r);
+		r.numerator = 255;
+		exif_set_rational (
+			e->data + 3 * exif_format_get_size (e->format), o, r);
+		r.numerator = 0;
+		exif_set_rational (
+			e->data + 4 * exif_format_get_size (e->format), o, r);
+		r.numerator = 255;
+		exif_set_rational (
+			e->data + 5 * exif_format_get_size (e->format), o, r);
+		break;
+
+	/* ASCII, 20 components */
+	case EXIF_TAG_DATE_TIME:
+	case EXIF_TAG_DATE_TIME_ORIGINAL:
+	case EXIF_TAG_DATE_TIME_DIGITIZED:
+	{
+		time_t t;
+#ifdef HAVE_LOCALTIME_R
+		struct tm tms;
+#endif
+		struct tm *tm;
+
+		t = time (NULL);
+#ifdef HAVE_LOCALTIME_R
+		tm = localtime_r (&t, &tms);
+#else
+		tm = localtime (&t);
+#endif
+		e->components = 20;
+		e->format = EXIF_FORMAT_ASCII;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		snprintf ((char *) e->data, e->size,
+			  "%04i:%02i:%02i %02i:%02i:%02i",
+			  tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
+			  tm->tm_hour, tm->tm_min, tm->tm_sec);
+		break;
+	}
+
+	/* ASCII, no default */
+	case EXIF_TAG_SUB_SEC_TIME:
+	case EXIF_TAG_SUB_SEC_TIME_ORIGINAL:
+	case EXIF_TAG_SUB_SEC_TIME_DIGITIZED:
+		e->components = 0;
+		e->format = EXIF_FORMAT_ASCII;
+		e->size = 0;
+		e->data = NULL;
+		break;
+
+	/* ASCII, default "[None]" */
+	case EXIF_TAG_IMAGE_DESCRIPTION:
+	case EXIF_TAG_MAKE:
+	case EXIF_TAG_MODEL:
+	case EXIF_TAG_SOFTWARE:
+	case EXIF_TAG_ARTIST:
+		e->components = strlen (_("[None]")) + 1;
+		e->format = EXIF_FORMAT_ASCII;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		strncpy ((char *)e->data, _("[None]"), e->size);
+		break;
+	/* ASCII, default "[None]\0[None]\0" */
+	case EXIF_TAG_COPYRIGHT:
+		e->components = (strlen (_("[None]")) + 1) * 2;
+		e->format = EXIF_FORMAT_ASCII;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		strcpy (((char *)e->data) + 0, _("[None]"));
+		strcpy (((char *)e->data) + strlen (_("[None]")) + 1, _("[None]"));
+		break;
+
+	/* UNDEFINED, 1 component, default 1 */
+	case EXIF_TAG_SCENE_TYPE:
+		e->components = 1;
+		e->format = EXIF_FORMAT_UNDEFINED;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		e->data[0] = 0x01;
+		break;
+
+	/* UNDEFINED, 1 component, default 3 */
+	case EXIF_TAG_FILE_SOURCE:
+		e->components = 1;
+		e->format = EXIF_FORMAT_UNDEFINED;
+		e->size = exif_format_get_size (e->format) * e->components;
+		e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		e->data[0] = 0x03;
+		break;
+
+	/* UNDEFINED, 4 components, default 48 49 48 48 */
+        case EXIF_TAG_FLASH_PIX_VERSION:
+                e->components = 4;
+                e->format = EXIF_FORMAT_UNDEFINED;
+                e->size = exif_format_get_size (e->format) * e->components;
+                e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+                memcpy (e->data, "0100", 4);
+                break;
+
+        /* UNDEFINED, 4 components, default 48 50 49 48 */
+        case EXIF_TAG_EXIF_VERSION:
+                e->components = 4;
+                e->format = EXIF_FORMAT_UNDEFINED;
+                e->size = exif_format_get_size (e->format) * e->components;
+                e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+                memcpy (e->data, "0210", 4);
+                break;
+
+        /* UNDEFINED, 4 components, default 1 2 3 0 */
+        case EXIF_TAG_COMPONENTS_CONFIGURATION:
+                e->components = 4;
+                e->format = EXIF_FORMAT_UNDEFINED;
+                e->size = exif_format_get_size (e->format) * e->components;
+                e->data = exif_entry_alloc (e, e->size);
+		if (!e->data) break;
+		e->data[0] = 1;
+		e->data[1] = 2;
+		e->data[2] = 3;
+		e->data[3] = 0;
+                break;
+
+	/* UNDEFINED, no components, no default */
+	/* Use this if the tag is otherwise unsupported */
+	case EXIF_TAG_MAKER_NOTE:
+	case EXIF_TAG_USER_COMMENT:
+	default:
+		e->components = 0;
+		e->format = EXIF_FORMAT_UNDEFINED;
+		e->size = 0;
+		e->data = NULL;
+		break;
+	}
+}
Property changes on: libexif/sources/libexif/exif-entry.c
___________________________________________________________________
Added: svn:eol-style
   + LF