diff options
| -rw-r--r-- | camel/ChangeLog | 6 | ||||
| -rw-r--r-- | camel/camel-mime-utils.c | 105 |
2 files changed, 111 insertions, 0 deletions
diff --git a/camel/ChangeLog b/camel/ChangeLog index 15f01eb181..d5e0aee1a3 100644 --- a/camel/ChangeLog +++ b/camel/ChangeLog @@ -1,3 +1,9 @@ +2000-07-02 Jeffrey Stedfast <fejj@helixcode.com> + + * camel-mime-utils.c (uudecode_step): A rather complex uudecoder + written in the spirit of Zucchi-ness, is it up to par? Only the + Z-man can tell us :-) + 2000-07-01 Dan Winship <danw@helixcode.com> * camel-service.c (camel_service_get_name): New method, to return diff --git a/camel/camel-mime-utils.c b/camel/camel-mime-utils.c index 12dc48c1b6..e30c24b87d 100644 --- a/camel/camel-mime-utils.c +++ b/camel/camel-mime-utils.c @@ -56,6 +56,8 @@ int free_count = 0; #define d(x) #define d2(x) +#define CAMEL_UUDECODE_CHAR(c) (((c) - ' ') & 077) + static char *base64_alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; @@ -354,6 +356,17 @@ base64_encode_step(unsigned char *in, int len, unsigned char *out, int *state, i return outptr-out; } + +/** + * base64_decode_step: decode a chunk of base64 encoded data + * @in: input stream + * @len: max length of data to decode ( normally strlen(in) ??) + * @out: output stream + * @state: holds the number of bits that are stored in @save + * @save: leftover bits that have not yet been decoded + * + * Decodes a chunk of base64 encoded data + **/ int base64_decode_step(unsigned char *in, int len, unsigned char *out, int *state, unsigned int *save) { @@ -402,6 +415,98 @@ base64_decode_step(unsigned char *in, int len, unsigned char *out, int *state, u return outptr-out; } + +/** + * uudecode_step: uudecode a chunk of data + * @in: input stream + * @len: max length of data to decode ( normally strlen(in) ??) + * @out: output stream + * @state: holds the number of bits that are stored in @save + * @save: leftover bits that have not yet been decoded + * @uulen: holds the value of the length-char which is used to calculate + * how many more chars need to be decoded for that 'line' + * + * uudecodes a chunk of data. Assumes the "begin <mode> <file name>" line + * has been stripped off. + **/ +int +uudecode_step (unsigned char *in, int len, unsigned char *out, int *state, guint32 *save, char *uulen) +{ + register unsigned char *inptr, *outptr; + unsigned char *inend, ch; + register guint32 saved; + gboolean last_was_eoln; + int i; + + if (*uulen <= 0) + last_was_eoln = TRUE; + else + last_was_eoln = FALSE; + + inend = in + len; + outptr = out; + saved = *save; + i = *state; + inptr = in; + while (inptr < inend && *inptr) { + if (*inptr == '\n' || last_was_eoln) { + if (last_was_eoln) { + *uulen = CAMEL_UUDECODE_CHAR (*inptr); + last_was_eoln = FALSE; + } else { + last_was_eoln = TRUE; + } + + inptr++; + continue; + } + + ch = *inptr++; + + if (*uulen > 0) { + /* save the byte */ + saved = (saved << 8) | ch; + i++; + if (i == 4) { + /* convert 4 uuencoded bytes to 3 normal bytes */ + unsigned char b0, b1, b2, b3; + + b0 = saved >> 24; + b1 = saved >> 16 & 0xff; + b2 = saved >> 8 & 0xff; + b3 = saved & 0xff; + + if (*uulen >= 3) { + *outptr++ = CAMEL_UUDECODE_CHAR (b0) << 2 | CAMEL_UUDECODE_CHAR (b1) >> 4; + *outptr++ = CAMEL_UUDECODE_CHAR (b1) << 4 | CAMEL_UUDECODE_CHAR (b2) >> 2; + *outptr++ = CAMEL_UUDECODE_CHAR (b2) << 6 | CAMEL_UUDECODE_CHAR (b3); + } else { + int j = 0; + + if (*uulen >= 1) { + *outptr++ = CAMEL_UUDECODE_CHAR (b0) << 2 | CAMEL_UUDECODE_CHAR (b1) >> 4; + j++; + } + if (*uulen >= 2) { + *outptr++ = CAMEL_UUDECODE_CHAR (b1) << 4 | CAMEL_UUDECODE_CHAR (b2) >> 2; + } + } + + i = 0; + saved = 0; + *uulen -= 3; + } + } else { + break; + } + } + + *save = saved; + *state = i; + + return outptr - out; +} + int quoted_encode_close(unsigned char *in, int len, unsigned char *out, int *state, int *save) { |