From 57a61b5077717e6caa74535d99f3ec523f61247a Mon Sep 17 00:00:00 2001
From: Nathan Wagner <nw@hydaspes.if.org>
Date: Thu, 23 Apr 2015 11:07:55 +0000
Subject: [PATCH] added uuencode implementation

---
 utils/uuencode/uuencode.c | 116 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 utils/uuencode/uuencode.c

diff --git a/utils/uuencode/uuencode.c b/utils/uuencode/uuencode.c
new file mode 100644
index 0000000..9f5df43
--- /dev/null
+++ b/utils/uuencode/uuencode.c
@@ -0,0 +1,116 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+char oldbase[65];
+
+void do_historical(FILE *in, FILE *out, char *decode) {
+	unsigned char input[45];
+	unsigned char output[62];
+	size_t bytes;
+
+	fprintf(out, "begin %s %s\n", "644", decode);
+	do {
+		unsigned int bits;
+		int i;
+		input[0] = 0; input[1] = 0; input[2] = 0;
+		bytes = fread(input, 1, 45, in);
+
+		for (i = bytes; i < 45; i++) {
+			input[i] = 0;
+		}
+		output[0] = oldbase[bytes];
+		output[1] = 0;
+
+		for (i=0;i<bytes;i+=3) {
+			bits = (input[i] << 16) | (input[i+1] << 8) | (input[i+2]);
+
+			output[i/3*4+4] = oldbase[(bits & 0x3f)];
+			output[i/3*4+3] = oldbase[((bits >> 6) & 0x3f)];
+			output[i/3*4+2] = oldbase[((bits >> 12) & 0x3f)];
+			output[i/3*4+1] = oldbase[((bits >> 18) & 0x3f)];
+			output[i/3*4+5] = 0;
+		}
+		fprintf(out, "%s\n", output);
+	} while (bytes);
+	fprintf(out, "end\n");
+}
+
+int main(int ac, char *av[]) {
+	int mime = 0;
+	char *file = 0;
+	char *decode = 0;
+	FILE *output = stdout;
+	unsigned char input[3];
+	int groups = 0;
+	size_t bytes;
+	int i;
+
+	for (i = 0; i<64; i++) {
+		oldbase[i] = i + 0x20;
+	}
+	oldbase[0] = '`';
+
+	decode = av[ac-1];
+	if (!strcmp(av[1], "-m")) {
+		mime = 1;
+		if (ac == 4) {
+			file = av[ac-2];
+		}
+	} else if (ac == 3) {
+		file = av[ac-2];
+	}
+
+	if (file) {
+		if (freopen(file, "r", stdin) == 0) {
+			perror("can't open file:");
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	if (!mime) {
+		do_historical(stdin, output, decode);
+		exit(EXIT_SUCCESS);
+	}
+
+	fprintf(output, "begin-base64 %s %s\n", "644", decode);
+
+	do {
+		unsigned char out[4];
+		unsigned int bits;
+		int i;
+		input[0] = 0; input[1] = 0; input[2] = 0;
+		bytes = fread(input, 1, 3, stdin);
+		if (!bytes) {
+			continue;
+		}
+		bits = (input[0] << 16) | (input[1] << 8) | (input[2]);
+
+		out[3] = bits & 0x3f;
+		out[2] = (bits >> 6) & 0x3f;
+		out[1] = (bits >> 12) & 0x3f;
+		out[0] = (bits >> 18) & 0x3f;
+		
+		for (i=0;i < bytes+1; i++) {
+			fputc(base64[out[i]], stdout);
+		}
+
+		switch (bytes) {
+			case 1:
+				fputc('=', stdout);
+			case 2:
+				fputc('=', stdout);
+		}
+		if (++groups % 15 == 0) {
+			fputc('\n', stdout);
+		}
+	} while (bytes);
+
+	if (groups % 15 != 0) {
+		fputc('\n', stdout);
+	}
+	fprintf(stdout, "====\n");
+
+	return 0;
+}
-- 
2.40.0