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Dependencies:   mbed

lwip/Core/arch/iputil.c@0:3c32eeb9292a, 2011-09-22 (annotated)

Committer:
geiineuville
Date:
Thu Sep 22 15:59:17 2011 +0000
Revision:
0:3c32eeb9292a
V4

Who changed what in which revision?

UserRevisionLine numberNew contents of line
geiineuville 0:3c32eeb9292a 1 #include "iputil.h"
geiineuville 0:3c32eeb9292a 2
geiineuville 0:3c32eeb9292a 3 unsigned int base64enc_len(const char *str) {
geiineuville 0:3c32eeb9292a 4 return (((strlen(str)-1)/3)+1)<<2;
geiineuville 0:3c32eeb9292a 5 }
geiineuville 0:3c32eeb9292a 6
geiineuville 0:3c32eeb9292a 7 void base64enc(const char *input, unsigned int length, char *output) {
geiineuville 0:3c32eeb9292a 8 static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
geiineuville 0:3c32eeb9292a 9 unsigned int c, c1, c2, c3;
geiineuville 0:3c32eeb9292a 10 for(unsigned int i = 0, j = 0; i<length; i+=3,j+=4) {
geiineuville 0:3c32eeb9292a 11 c1 = ((((unsigned char)*((unsigned char *)&input[i]))));
geiineuville 0:3c32eeb9292a 12 c2 = (length>i+1)?((((unsigned char)*((unsigned char *)&input[i+1])))):0;
geiineuville 0:3c32eeb9292a 13 c3 = (length>i+2)?((((unsigned char)*((unsigned char *)&input[i+2])))):0;
geiineuville 0:3c32eeb9292a 14
geiineuville 0:3c32eeb9292a 15 c = ((c1 & 0xFC) >> 2);
geiineuville 0:3c32eeb9292a 16 output[j+0] = base64[c];
geiineuville 0:3c32eeb9292a 17 c = ((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4);
geiineuville 0:3c32eeb9292a 18 output[j+1] = base64[c];
geiineuville 0:3c32eeb9292a 19 c = ((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6);
geiineuville 0:3c32eeb9292a 20 output[j+2] = (length>i+1)?base64[c]:'=';
geiineuville 0:3c32eeb9292a 21 c = (c3 & 0x3F);
geiineuville 0:3c32eeb9292a 22 output[j+3] = (length>i+2)?base64[c]:'=';
geiineuville 0:3c32eeb9292a 23 }
geiineuville 0:3c32eeb9292a 24 output[(((length-1)/3)+1)<<2] = '\0';
geiineuville 0:3c32eeb9292a 25 }