Rewrote our local implementation of a Base64 encoder/decoder as specified

[citadel.git] / libcitadel / lib / b64 / cdecode.c

diff --git a/libcitadel/lib/b64/cdecode.c b/libcitadel/lib/b64/cdecode.c
deleted file mode 100644 (file)
index 8f3ff94..0000000
--- a/libcitadel/lib/b64/cdecode.c
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
-cdecoder.c - c source to a base64 decoding algorithm implementation
-
-This is part of the libb64 project, and has been placed in the public domain.
-For details, see http://sourceforge.net/projects/libb64
-*/
-
-#include "b64/cdecode.h"
-
-int base64_decode_value(char value_in)
-{
-       static const char decoding[] = {62,-1,-1,-1,63,52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-2,-1,-1,-1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,-1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51};
-       static const char decoding_size = sizeof(decoding);
-       value_in -= 43;
-       if (value_in < 0 || value_in > decoding_size) return -1;
-       return decoding[(int)value_in];
-}
-
-void base64_init_decodestate(base64_decodestate* state_in)
-{
-       state_in->step = step_a;
-       state_in->plainchar = 0;
-}
-
-int base64_decode_block(const char* code_in, const int length_in, char* plaintext_out, base64_decodestate* state_in)
-{
-       const char* codechar = code_in;
-       char* plainchar = plaintext_out;
-       char fragment;
-       
-       *plainchar = state_in->plainchar;
-       
-       switch (state_in->step)
-       {
-               while (1)
-               {
-       case step_a:
-                       do {
-                               if (codechar == code_in+length_in)
-                               {
-                                       state_in->step = step_a;
-                                       state_in->plainchar = *plainchar;
-                                       return plainchar - plaintext_out;
-                               }
-                               fragment = (char)base64_decode_value(*codechar++);
-                       } while (fragment < 0);
-                       *plainchar    = (fragment & 0x03f) << 2;
-       case step_b:
-                       do {
-                               if (codechar == code_in+length_in)
-                               {
-                                       state_in->step = step_b;
-                                       state_in->plainchar = *plainchar;
-                                       return plainchar - plaintext_out;
-                               }
-                               fragment = (char)base64_decode_value(*codechar++);
-                       } while (fragment < 0);
-                       *plainchar++ |= (fragment & 0x030) >> 4;
-                       *plainchar    = (fragment & 0x00f) << 4;
-       case step_c:
-                       do {
-                               if (codechar == code_in+length_in)
-                               {
-                                       state_in->step = step_c;
-                                       state_in->plainchar = *plainchar;
-                                       return plainchar - plaintext_out;
-                               }
-                               fragment = (char)base64_decode_value(*codechar++);
-                       } while (fragment < 0);
-                       *plainchar++ |= (fragment & 0x03c) >> 2;
-                       *plainchar    = (fragment & 0x003) << 6;
-       case step_d:
-                       do {
-                               if (codechar == code_in+length_in)
-                               {
-                                       state_in->step = step_d;
-                                       state_in->plainchar = *plainchar;
-                                       return plainchar - plaintext_out;
-                               }
-                               fragment = (char)base64_decode_value(*codechar++);
-                       } while (fragment < 0);
-                       *plainchar++   |= (fragment & 0x03f);
-               }
-       }
-       /* control should not reach here */
-       return plainchar - plaintext_out;
-}
-