diff options
Diffstat (limited to 'release/src/router/busybox/libbb/uuencode.c')
-rw-r--r-- | release/src/router/busybox/libbb/uuencode.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/release/src/router/busybox/libbb/uuencode.c b/release/src/router/busybox/libbb/uuencode.c new file mode 100644 index 00000000..67d98d59 --- /dev/null +++ b/release/src/router/busybox/libbb/uuencode.c @@ -0,0 +1,71 @@ +/* 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 + 2] ALIGN1 = { + '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 */, + '\n', '\0' /* needed for uudecode.c */ +}; + +const char bb_uuenc_tbl_std[65] ALIGN1 = { + '`', '!', '"', '#', '$', '%', '&', '\'', + '(', ')', '*', '+', ',', '-', '.', '/', + '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 bytes at S of length LENGTH to uuencode or 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 FAST_FUNC bb_uuencode(char *p, const void *src, int length, const char *tbl) +{ + const unsigned char *s = src; + + /* Transform the 3x8 bits to 4x6 bits */ + while (length > 0) { + unsigned s1, s2; + + /* Are s[1], s[2] valid or should be assumed 0? */ + s1 = s2 = 0; + length -= 3; /* can be >=0, -1, -2 */ + if (length >= -1) { + s1 = s[1]; + if (length >= 0) + s2 = s[2]; + } + *p++ = tbl[s[0] >> 2]; + *p++ = tbl[((s[0] & 3) << 4) + (s1 >> 4)]; + *p++ = tbl[((s1 & 0xf) << 2) + (s2 >> 6)]; + *p++ = tbl[s2 & 0x3f]; + s += 3; + } + /* Zero-terminate */ + *p = '\0'; + /* If length is -2 or -1, pad last char or two */ + while (length) { + *--p = tbl[64]; + length++; + } +} |