uuencode and uudecode by Erich Plondke.

1 files changed, 116 insertions, 0 deletions

diff --git a/toys/pending/uuencode.c b/toys/pending/uuencode.c
new file mode 100644
index 00000000..d6cc5ad2
--- /dev/null
+++ b/toys/pending/uuencode.c
@@ -0,0 +1,116 @@
+/* uuencode.c - uuencode / base64 encode
+ *
+ * Copyright 2013 Erich Plondke <toybox@erich.wreck.org>
+ *
+ * See http://pubs.opengroup.org/onlinepubs/9699919799/utilities/uuencode.html
+
+USE_UUENCODE(NEWTOY(uuencode, "<1>2m", TOYFLAG_USR|TOYFLAG_BIN))
+
+config UUENCODE
+  bool "uuencode"
+  default n
+  help
+    usage: uuencode [-m] [file] encode-filename
+
+    Uuencode or (with -m option) base64-encode stdin or [file], 
+    with encode-filename in the output, which is sent to stdout.
+*/
+
+#define FOR_uuencode
+#include "toys.h"
+
+
+
+static void uuencode_b64_3bytes(char *out, const char *in, int bytes)
+{
+  static const char *table = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+                             "abcdefghijklmnopqrstuvwxyz"
+                             "0123456789+/";
+  unsigned int i,x=0;
+  for (i = 0; i < bytes; i++) {
+    x |= (in[i] & 0x0ff) << (8*(2-i));
+  }
+  out[0] = table[(x>>(3*6)) & 0x3f];
+  out[1] = table[(x>>(2*6)) & 0x3f];
+  out[2] = table[(x>>(1*6)) & 0x3f];
+  out[3] = table[(x>>(0*6)) & 0x3f];
+  if (bytes <= 1) out[2] = '=';
+  if (bytes <= 2) out[3] = '=';
+}
+
+static void uuencode_b64_line(char *out, const char *in, int len)
+{
+  while (len > 0) {
+    uuencode_b64_3bytes(out,in,len < 3 ? len : 3);
+    xprintf("%c%c%c%c",out[0],out[1],out[2],out[3]);
+    in += 3;
+    len -= 3;
+  };
+  xprintf("\n");
+}
+
+static void uuencode_b64(int fd, const char *name)
+{
+  int len;
+  char *inbuf = toybuf;
+  char *outbuf = toybuf+64;
+  xprintf("begin-base64 744 %s\n",name);
+  do {
+    len = xread(fd,inbuf,48);
+    uuencode_b64_line(outbuf,inbuf,len);
+  } while (len > 0);
+  xprintf("====\n");
+}
+
+
+static void uuencode_uu_3bytes(char *out, const char *in)
+{
+  unsigned int i,x=0;
+  for (i = 0; i <= 2; i++) {
+    x |= (in[i] & 0x0ff) << (8*(2-i));
+  }
+  for (i = 0; i <= 3; i++) {
+    out[i] = 32 + ((x >> (6*(3-i))) & 0x3f);
+  }
+}
+
+static void uuencode_uu_line(char *out, const char *in, int len)
+{
+  int i;
+  if (len == 0) {
+    xprintf("`\n");
+    return;
+  }
+  xprintf("%c",len+32);
+  for (i = 0; i < len; i += 3) {
+    uuencode_uu_3bytes(out,in+i);
+    xprintf("%c%c%c%c",out[0],out[1],out[2],out[3]);
+  }
+  xprintf("\n");
+}
+
+static void uuencode_uu(int fd, const char *name)
+{
+  int len;
+  char *inbuf = toybuf;
+  char *outbuf = toybuf+64;
+  xprintf("begin 744 %s\n",name);
+  do {
+    len = xread(fd,inbuf,45);
+    uuencode_uu_line(outbuf,inbuf,len);
+  } while (len > 0);
+  xprintf("end\n");
+}
+
+void uuencode_main(void)
+{
+  char *encode_filename = toys.optargs[0];
+  int fd = 0; /* STDIN */
+
+  if (toys.optc == 2) {
+    fd = xopen(toys.optargs[0],O_RDONLY); // dies if error
+    encode_filename = toys.optargs[1];
+  }
+  if (toys.optflags & FLAG_m) uuencode_b64(fd,encode_filename);
+  else uuencode_uu(fd,encode_filename);
+}