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16
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1
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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 #include "libstrfunc.h"
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8
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9 char *_sf_b64_buf=NULL;
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10 size_t _sf_b64_len=0;
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11
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12
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13 static unsigned char _sf_uc_ib[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/==";
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14
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15 char *
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16 base64_encode(void *data, size_t size) {
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17 char *output;
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18 register char *ou;
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19 register unsigned char *p=(unsigned char *)data;
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20 #ifdef __LINUX__
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21 register void * dte = ((char*)data + size);
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22 #endif
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23
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24 #ifndef __LINUX__
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25 register void * dte = (void*)((char*)data + size);
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26 #endif
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27 //register void *dte=data + size;
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28 register int nc=0;
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29
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30 if(data == NULL)
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31 return NULL;
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32
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33 ou=output=(char *)malloc(size / 3 * 4 + (size / 50) + 5);
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34 if(!output)
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35 return NULL;
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36
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37 while((char *)dte - (char *)p >= 3) {
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38 *ou = _sf_uc_ib[ *p >> 2 ];
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39 ou[1] = _sf_uc_ib[ ((*p & 0x03) << 4) | (p[1] >> 4) ];
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40 ou[2] = _sf_uc_ib[ ((p[1] & 0x0F) << 2) | (p[2] >> 6) ];
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41 ou[3] = _sf_uc_ib[ p[2] & 0x3F ];
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42
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43 p+=3;
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44 ou+=4;
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45
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46 nc+=4;
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47 if(!(nc % 76)) *ou++='\n';
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48 };
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49 if((char *)dte - (char *)p == 2) {
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50 *ou++ = _sf_uc_ib[ *p >> 2 ];
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51 *ou++ = _sf_uc_ib[ ((*p & 0x03) << 4) | (p[1] >> 4) ];
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52 *ou++ = _sf_uc_ib[ ((p[1] & 0x0F) << 2) ];
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53 *ou++ = '=';
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54 } else if((char *)dte - (char *)p == 1) {
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55 *ou++ = _sf_uc_ib[ *p >> 2 ];
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56 *ou++ = _sf_uc_ib[ ((*p & 0x03) << 4) ];
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57 *ou++ = '=';
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58 *ou++ = '=';
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59 };
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60
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61 *ou=0;
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62
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63 _sf_b64_len = (ou - output);
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64
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65 if(_sf_b64_buf)
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66 free(_sf_b64_buf);
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67 return _sf_b64_buf=output;
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68 };
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69
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