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authorDenis Vlasenko2006-09-03 15:49:40 +0000
committerDenis Vlasenko2006-09-03 15:49:40 +0000
commit21afc7dc291f1cb11feec7a9766bf3542545f581 (patch)
tree5cf8056965bf44d78ef9937fe1f529fa2915e772 /libbb/uuencode.c
parent22dca23d52c836e40c79cb4042b867fdc06f6ca3 (diff)
downloadbusybox-21afc7dc291f1cb11feec7a9766bf3542545f581.zip
busybox-21afc7dc291f1cb11feec7a9766bf3542545f581.tar.gz
uuencode: common implementation for wget and uuencode (closing bug 694)
Diffstat (limited to 'libbb/uuencode.c')
-rw-r--r--libbb/uuencode.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/libbb/uuencode.c b/libbb/uuencode.c
new file mode 100644
index 0000000..3840120
--- /dev/null
+++ b/libbb/uuencode.c
@@ -0,0 +1,63 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Copyright 2006 Rob Landley <rob@landley.net>
+ *
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+/* Conversion table. for base 64 */
+const char bb_uuenc_tbl_base64[65] = {
+ 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
+ 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
+ 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
+ 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
+ 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
+ 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
+ 'w', 'x', 'y', 'z', '0', '1', '2', '3',
+ '4', '5', '6', '7', '8', '9', '+', '/',
+ '=' /* termination character */
+};
+
+const char bb_uuenc_tbl_std[65] = {
+ '`', '!', '"', '#', '$', '%', '&', '\'',
+ '(', ')', '*', '+', ',', '-', '.', '/',
+ '0', '1', '2', '3', '4', '5', '6', '7',
+ '8', '9', ':', ';', '<', '=', '>', '?',
+ '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
+ 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
+ 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
+ 'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
+ '`' /* termination character */
+};
+
+/*
+ * Encode the string S of length LENGTH to base64 format and place it
+ * to STORE. STORE will be 0-terminated, and must point to a writable
+ * buffer of at least 1+BASE64_LENGTH(length) bytes.
+ * where BASE64_LENGTH(len) = (4 * ((LENGTH + 2) / 3))
+ */
+void bb_uuencode(const unsigned char *s, char *store, const int length, const char *tbl)
+{
+ int i;
+ char *p = store;
+
+ /* Transform the 3x8 bits to 4x6 bits, as required by base64. */
+ for (i = 0; i < length; i += 3) {
+ *p++ = tbl[s[0] >> 2];
+ *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)];
+ *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)];
+ *p++ = tbl[s[2] & 0x3f];
+ s += 3;
+ }
+ /* Pad the result if necessary... */
+ if (i == length + 1) {
+ *(p - 1) = tbl[64];
+ }
+ else if (i == length + 2) {
+ *(p - 1) = *(p - 2) = tbl[64];
+ }
+ /* ...and zero-terminate it. */
+ *p = '\0';
+}