Initial import

1 files changed, 65 insertions, 0 deletions

diff --git a/filter/ahxe.c b/filter/ahxe.c
new file mode 100644
index 00000000..e092653b
--- /dev/null
+++ b/filter/ahxe.c
@@ -0,0 +1,65 @@
+#include <fitz.h>
+
+typedef struct fz_ahxe_s fz_ahxe;
+
+struct fz_ahxe_s
+{
+	fz_filter super;
+	int c;
+};
+
+static const char tohex[16] = "0123456789ABCDEF";
+
+fz_error *
+fz_newahxe(fz_filter **fp, fz_obj *params)
+{
+	FZ_NEWFILTER(fz_ahxe, f, ahxe);
+	f->c = 0;
+	return nil;
+}
+
+void
+fz_freeahxe(fz_filter *f)
+{
+	fz_free(f);
+}
+
+fz_error *
+fz_processahxe(fz_filter *filter, fz_buffer *in, fz_buffer *out)
+{
+	fz_ahxe *f = (fz_ahxe*)filter;
+	int a, b, c;
+
+	while (1)
+	{
+		if (in->rp == in->wp)
+			goto needinput;
+
+		if (out->wp + 2 >= out->ep) /* can write 3 bytes from 1 */
+			return fz_ioneedout;
+
+		c = *in->rp++;
+		a = tohex[(c >> 4) & 0x0f];
+		b = tohex[c & 0x0f];
+
+		*out->wp++ = a;
+		*out->wp++ = b;
+
+		f->c += 2;
+		if (f->c == 60) {
+			*out->wp++ = '\n';
+			f->c = 0;
+		}
+	}
+
+needinput:
+	if (in->eof) {
+		if (out->wp == out->ep)
+			return fz_ioneedout;
+		*out->wp++ = '>';
+		out->eof = 1;
+		return fz_iodone;
+	}
+	return fz_ioneedin;
+}
+