rename part 1 -- files

1 files changed, 127 insertions, 0 deletions

diff --git a/stream/filt_a85e.c b/stream/filt_a85e.c
new file mode 100644
index 00000000..d9cd22c6
--- /dev/null
+++ b/stream/filt_a85e.c
@@ -0,0 +1,127 @@
+#include <fitz.h>
+
+typedef struct fz_a85e_s fz_a85e;
+
+struct fz_a85e_s
+{
+	fz_filter super;
+	int c;
+};
+
+fz_error *
+fz_newa85e(fz_filter **fp, fz_obj *params)
+{
+	FZ_NEWFILTER(fz_a85e, f, a85e);
+	f->c = 0;
+	return nil;
+}
+
+void
+fz_dropa85e(fz_filter *f)
+{
+}
+
+fz_error *
+fz_processa85e(fz_filter *filter, fz_buffer *in, fz_buffer *out)
+{
+	fz_a85e *f = (fz_a85e*)filter;
+	unsigned long word;
+	int count;
+	int n;
+
+	n = 0;
+
+	while (1)
+	{
+		if (f->c >= 70) {
+			if (out->wp + 1 > out->ep)
+				return fz_ioneedout;
+			*out->wp++ = '\n';
+			f->c = 0;
+			n ++;
+		}
+
+		if (in->rp + 4 <= in->wp)
+		{
+			word =	(in->rp[0] << 24) |
+					(in->rp[1] << 16) |
+					(in->rp[2] << 8) |
+					(in->rp[3]);
+			if (word == 0) {
+				if (out->wp + 1 > out->ep)
+					return fz_ioneedout;
+				*out->wp++ = 'z';
+				f->c ++;
+				n ++;
+			}
+			else {
+				unsigned long v1, v2, v3, v4;
+
+				if (out->wp + 5 > out->ep)
+					return fz_ioneedout;
+
+				v4 = word / 85;
+				v3 = v4 / 85;
+				v2 = v3 / 85;
+				v1 = v2 / 85;
+
+				*out->wp++ = (v1 % 85) + '!';
+				*out->wp++ = (v2 % 85) + '!';
+				*out->wp++ = (v3 % 85) + '!';
+				*out->wp++ = (v4 % 85) + '!';
+				*out->wp++ = (word % 85) + '!';
+				f->c += 5;
+				n += 5;
+			}
+			in->rp += 4;
+		}
+
+		else if (in->eof)
+		{
+			unsigned long divisor;
+
+			if (in->rp == in->wp)
+				goto needinput; /* handle clean eof here */
+
+			count = in->wp - in->rp;
+
+			if (out->wp + count + 3 > out->ep)
+				return fz_ioneedout;
+
+			word = 0;
+			switch (count) {
+				case 3: word |= in->rp[2] << 8;
+				case 2: word |= in->rp[1] << 16;
+				case 1: word |= in->rp[0] << 24;
+			}
+			in->rp += count;
+			
+			divisor = 85L * 85 * 85 * 85;
+			while (count-- >= 0) {
+				*out->wp++ = ((word / divisor) % 85) + '!';
+				divisor /= 85;
+			}
+	
+			*out->wp++ = '~';
+			*out->wp++ = '>';
+			out->eof = 1;
+			return fz_iodone;
+		}
+
+		else {
+			goto needinput;
+		}
+	}
+
+needinput:
+	if (in->eof) {
+		if (out->wp + 2 > out->ep)
+			return fz_ioneedout;
+		*out->wp++ = '~';
+		*out->wp++ = '>';
+		out->eof = 1;
+		return fz_iodone;
+	}
+	return fz_ioneedin;
+}
+