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Dependencies:   mbed

lwip/Core/arch/iputil.c@0:9cf1d79ebe04, 2011-09-08 (annotated)

Committer:
geiineuville
Date:
Thu Sep 08 08:57:21 2011 +0000
Revision:
0:9cf1d79ebe04
v0 v1 v2   \"v3\"

Who changed what in which revision?

UserRevisionLine numberNew contents of line
geiineuville 0:9cf1d79ebe04 1 #include "iputil.h"
geiineuville 0:9cf1d79ebe04 2
geiineuville 0:9cf1d79ebe04 3 unsigned int base64enc_len(const char *str) {
geiineuville 0:9cf1d79ebe04 4 return (((strlen(str)-1)/3)+1)<<2;
geiineuville 0:9cf1d79ebe04 5 }
geiineuville 0:9cf1d79ebe04 6
geiineuville 0:9cf1d79ebe04 7 void base64enc(const char *input, unsigned int length, char *output) {
geiineuville 0:9cf1d79ebe04 8 static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
geiineuville 0:9cf1d79ebe04 9 unsigned int c, c1, c2, c3;
geiineuville 0:9cf1d79ebe04 10 for(unsigned int i = 0, j = 0; i<length; i+=3,j+=4) {
geiineuville 0:9cf1d79ebe04 11 c1 = ((((unsigned char)*((unsigned char *)&input[i]))));
geiineuville 0:9cf1d79ebe04 12 c2 = (length>i+1)?((((unsigned char)*((unsigned char *)&input[i+1])))):0;
geiineuville 0:9cf1d79ebe04 13 c3 = (length>i+2)?((((unsigned char)*((unsigned char *)&input[i+2])))):0;
geiineuville 0:9cf1d79ebe04 14
geiineuville 0:9cf1d79ebe04 15 c = ((c1 & 0xFC) >> 2);
geiineuville 0:9cf1d79ebe04 16 output[j+0] = base64[c];
geiineuville 0:9cf1d79ebe04 17 c = ((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4);
geiineuville 0:9cf1d79ebe04 18 output[j+1] = base64[c];
geiineuville 0:9cf1d79ebe04 19 c = ((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6);
geiineuville 0:9cf1d79ebe04 20 output[j+2] = (length>i+1)?base64[c]:'=';
geiineuville 0:9cf1d79ebe04 21 c = (c3 & 0x3F);
geiineuville 0:9cf1d79ebe04 22 output[j+3] = (length>i+2)?base64[c]:'=';
geiineuville 0:9cf1d79ebe04 23 }
geiineuville 0:9cf1d79ebe04 24 output[(((length-1)/3)+1)<<2] = '\0';
geiineuville 0:9cf1d79ebe04 25 }