diff options
author | Denis Vlasenko <vda.linux@googlemail.com> | 2006-09-03 19:49:40 +0400 |
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committer | Denis Vlasenko <vda.linux@googlemail.com> | 2006-09-03 19:49:40 +0400 |
commit | 21afc7dc291f1cb11feec7a9766bf3542545f581 (patch) | |
tree | 5cf8056965bf44d78ef9937fe1f529fa2915e772 /libbb/uuencode.c | |
parent | 22dca23d52c836e40c79cb4042b867fdc06f6ca3 (diff) |
uuencode: common implementation for wget and uuencode (closing bug 694)
Diffstat (limited to 'libbb/uuencode.c')
-rw-r--r-- | libbb/uuencode.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/libbb/uuencode.c b/libbb/uuencode.c new file mode 100644 index 000000000..38401205b --- /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'; +} |