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authorJeffrey Stedfast <fejj@helixcode.com>2000-07-02 13:17:40 +0800
committerJeffrey Stedfast <fejj@src.gnome.org>2000-07-02 13:17:40 +0800
commit4c0c741c6d8ca6fa3b49a541f663f0d2af6a4bff (patch)
tree25f65bad4ed119915e9f227f1b53c94126090014 /camel/camel-mime-utils.c
parentfbc6a557a6d394fb9749cac6e739b6de63752b74 (diff)
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A rather complex uudecoder written in the spirit of Zucchi-ness, is it up
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 :-) svn path=/trunk/; revision=3856
Diffstat (limited to 'camel/camel-mime-utils.c')
-rw-r--r--camel/camel-mime-utils.c105
1 files changed, 105 insertions, 0 deletions
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)
{