diff options
Diffstat (limited to 'host/utils/cdecode.c')
-rw-r--r-- | host/utils/cdecode.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/host/utils/cdecode.c b/host/utils/cdecode.c deleted file mode 100644 index 1d09cbe22..000000000 --- a/host/utils/cdecode.c +++ /dev/null @@ -1,80 +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 "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 ((signed char)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; -} - -size_t base64_decode_block(const char* code_in, const size_t 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 ((signed char)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 ((signed char)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 ((signed char)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 ((signed char)fragment < 0); - *plainchar++ |= (fragment & 0x03f); - } - } - /* control should not reach here */ - return plainchar - plaintext_out; -} |