First commit - moving from LuaForge to SourceForge

1 files changed, 214 insertions, 0 deletions

diff --git a/src/libexif/exif-utils.c b/src/libexif/exif-utils.c
new file mode 100644
index 0000000..9386012
--- /dev/null
+++ b/src/libexif/exif-utils.c
@@ -0,0 +1,214 @@
+/* exif-utils.c
+ *
+ * Copyright © 2001 Lutz Müller <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 <libexif/exif-utils.h>
+
+void
+exif_array_set_byte_order (ExifFormat f, unsigned char *b, unsigned int n,
+		ExifByteOrder o_orig, ExifByteOrder o_new)
+{
+	unsigned int j;
+	unsigned int fs = exif_format_get_size (f);
+	ExifShort s;
+	ExifSShort ss;
+	ExifLong l;
+	ExifSLong sl;
+	ExifRational r;
+	ExifSRational sr;
+
+	if (!b || !n || !fs) return;
+
+	switch (f) {
+	case EXIF_FORMAT_SHORT:
+		for (j = 0; j < n; j++) {
+			s = exif_get_short (b + j * fs, o_orig);
+			exif_set_short (b + j * fs, o_new, s);
+		}
+		break;
+	case EXIF_FORMAT_SSHORT:
+		for (j = 0; j < n; j++) {
+			ss = exif_get_sshort (b + j * fs, o_orig);
+			exif_set_sshort (b + j * fs, o_new, ss);
+		}
+		break;
+	case EXIF_FORMAT_LONG:
+		for (j = 0; j < n; j++) {
+			l = exif_get_long (b + j * fs, o_orig);
+			exif_set_long (b + j * fs, o_new, l);
+		}
+		break;
+	case EXIF_FORMAT_RATIONAL:
+		for (j = 0; j < n; j++) {
+			r = exif_get_rational (b + j * fs, o_orig);
+			exif_set_rational (b + j * fs, o_new, r);
+		}
+		break;
+	case EXIF_FORMAT_SLONG:
+		for (j = 0; j < n; j++) {
+			sl = exif_get_slong (b + j * fs, o_orig);
+			exif_set_slong (b + j * fs, o_new, sl);
+		}
+		break;
+	case EXIF_FORMAT_SRATIONAL:
+		for (j = 0; j < n; j++) {
+			sr = exif_get_srational (b + j * fs, o_orig);
+			exif_set_srational (b + j * fs, o_new, sr);
+		}
+		break;
+	case EXIF_FORMAT_UNDEFINED:
+	case EXIF_FORMAT_BYTE:
+	case EXIF_FORMAT_ASCII:
+	default:
+		/* Nothing here. */
+		break;
+	}
+}
+
+ExifSShort
+exif_get_sshort (const unsigned char *buf, ExifByteOrder order)
+{
+	if (!buf) return 0;
+        switch (order) {
+        case EXIF_BYTE_ORDER_MOTOROLA:
+                return ((buf[0] << 8) | buf[1]);
+        case EXIF_BYTE_ORDER_INTEL:
+                return ((buf[1] << 8) | buf[0]);
+        }
+
+	/* Won't be reached */
+	return (0);
+}
+
+ExifShort
+exif_get_short (const unsigned char *buf, ExifByteOrder order)
+{
+	return (exif_get_sshort (buf, order) & 0xffff);
+}
+
+void
+exif_set_sshort (unsigned char *b, ExifByteOrder order, ExifSShort value)
+{
+	if (!b) return;
+	switch (order) {
+	case EXIF_BYTE_ORDER_MOTOROLA:
+		b[0] = (unsigned char) (value >> 8);
+		b[1] = (unsigned char) value;
+		break;
+	case EXIF_BYTE_ORDER_INTEL:
+		b[0] = (unsigned char) value;
+		b[1] = (unsigned char) (value >> 8);
+		break;
+	}
+}
+
+void
+exif_set_short (unsigned char *b, ExifByteOrder order, ExifShort value)
+{
+	exif_set_sshort (b, order, value);
+}
+
+ExifSLong
+exif_get_slong (const unsigned char *b, ExifByteOrder order)
+{
+	if (!b) return 0;
+        switch (order) {
+        case EXIF_BYTE_ORDER_MOTOROLA:
+                return ((b[0] << 24) | (b[1] << 16) | (b[2] << 8) | b[3]);
+        case EXIF_BYTE_ORDER_INTEL:
+                return ((b[3] << 24) | (b[2] << 16) | (b[1] << 8) | b[0]);
+        }
+
+	/* Won't be reached */
+	return (0);
+}
+
+void
+exif_set_slong (unsigned char *b, ExifByteOrder order, ExifSLong value)
+{
+	if (!b) return;
+	switch (order) {
+	case EXIF_BYTE_ORDER_MOTOROLA:
+		b[0] = (unsigned char) (value >> 24);
+		b[1] = (unsigned char) (value >> 16);
+		b[2] = (unsigned char) (value >> 8);
+		b[3] = (unsigned char) value;
+		break;
+	case EXIF_BYTE_ORDER_INTEL:
+		b[3] = (unsigned char) (value >> 24);
+		b[2] = (unsigned char) (value >> 16);
+		b[1] = (unsigned char) (value >> 8);
+		b[0] = (unsigned char) value;
+		break;
+	}
+}
+
+ExifLong
+exif_get_long (const unsigned char *buf, ExifByteOrder order)
+{
+        return (exif_get_slong (buf, order) & 0xffffffff);
+}
+
+void
+exif_set_long (unsigned char *b, ExifByteOrder order, ExifLong value)
+{
+	exif_set_slong (b, order, value);
+}
+
+ExifSRational
+exif_get_srational (const unsigned char *buf, ExifByteOrder order)
+{
+	ExifSRational r;
+
+	r.numerator   = buf ? exif_get_slong (buf, order) : 0;
+	r.denominator = buf ? exif_get_slong (buf + 4, order) : 0;
+
+	return (r);
+}
+
+ExifRational
+exif_get_rational (const unsigned char *buf, ExifByteOrder order)
+{
+	ExifRational r;
+
+	r.numerator   = buf ? exif_get_long (buf, order) : 0;
+	r.denominator = buf ? exif_get_long (buf + 4, order) : 0;
+
+	return (r);
+}
+
+void
+exif_set_rational (unsigned char *buf, ExifByteOrder order,
+		   ExifRational value)
+{
+	if (!buf) return;
+	exif_set_long (buf, order, value.numerator);
+	exif_set_long (buf + 4, order, value.denominator);
+}
+
+void
+exif_set_srational (unsigned char *buf, ExifByteOrder order,
+		    ExifSRational value)
+{
+	if (!buf) return;
+	exif_set_slong (buf, order, value.numerator);
+	exif_set_slong (buf + 4, order, value.denominator);
+}