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2 /* Taken from LibStrfunc v7.3 */
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3
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4 #include <stdio.h>
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5 #include <ctype.h>
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6 #include <stdlib.h>
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7
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8 char *_sf_b64_buf=NULL;
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9 size_t _sf_b64_len=0;
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10
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11
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12 static unsigned char _sf_uc_ib[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/==";
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13
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14 char *
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15 base64_encode(void *data, size_t size) {
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16 char *output;
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17 register char *ou;
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18 register unsigned char *p=(unsigned char *)data;
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19 #ifdef __LINUX__
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20 register void * dte = ((char*)data + size);
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21 #endif
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22
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23 #ifndef __LINUX__
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24 register void * dte = (void*)((char*)data + size);
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25 #endif
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26 //register void *dte=data + size;
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27 register int nc=0;
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28
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29 if(data == NULL)
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30 return NULL;
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31
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32 ou=output=(char *)malloc(size / 3 * 4 + (size / 50) + 5);
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33 if(!output)
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34 return NULL;
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35
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36 while((char *)dte - (char *)p >= 3) {
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37 *ou = _sf_uc_ib[ *p >> 2 ];
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38 ou[1] = _sf_uc_ib[ ((*p & 0x03) << 4) | (p[1] >> 4) ];
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39 ou[2] = _sf_uc_ib[ ((p[1] & 0x0F) << 2) | (p[2] >> 6) ];
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40 ou[3] = _sf_uc_ib[ p[2] & 0x3F ];
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41
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42 p+=3;
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43 ou+=4;
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44
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45 nc+=4;
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46 if(!(nc % 76)) *ou++='\n';
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47 };
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48 if((char *)dte - (char *)p == 2) {
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49 *ou++ = _sf_uc_ib[ *p >> 2 ];
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50 *ou++ = _sf_uc_ib[ ((*p & 0x03) << 4) | (p[1] >> 4) ];
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51 *ou++ = _sf_uc_ib[ ((p[1] & 0x0F) << 2) ];
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52 *ou++ = '=';
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53 } else if((char *)dte - (char *)p == 1) {
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54 *ou++ = _sf_uc_ib[ *p >> 2 ];
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55 *ou++ = _sf_uc_ib[ ((*p & 0x03) << 4) ];
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56 *ou++ = '=';
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57 *ou++ = '=';
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58 };
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59
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60 *ou=0;
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61
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62 _sf_b64_len = (ou - output);
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63
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64 if(_sf_b64_buf)
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65 free(_sf_b64_buf);
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66 return _sf_b64_buf=output;
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67 };
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68
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