Mercurial > libpst
annotate src/libstrfunc.c @ 158:59258d12bf77 stable-0-6-31
bump version for fedora cvs tagging mistake
author | Carl Byington <carl@five-ten-sg.com> |
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date | Sat, 14 Mar 2009 17:05:26 -0700 |
parents | cda7c812ec01 |
children | 6954d315aaa8 |
rev | line source |
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16 | 1 |
2 /* Taken from LibStrfunc v7.3 */ | |
3 | |
123
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4 #include "define.h" |
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5 |
16 | 6 |
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7 static char base64_code_chars[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=="; |
16 | 8 |
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9 void base64_append(char **ou, int *line_count, char data) |
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10 { |
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11 if (*line_count == 76) { |
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12 *(*ou)++ = '\n'; |
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13 *line_count = 0; |
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14 } |
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15 *(*ou)++ = data; |
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16 (*line_count)++; |
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17 } |
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18 |
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19 |
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20 char *base64_encode(void *data, size_t size) |
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21 { |
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22 int line_count = 0; |
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23 return base64_encode_multiple(data, size, &line_count); |
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24 } |
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25 |
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26 |
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27 char *base64_encode_multiple(void *data, size_t size, int *line_count) |
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28 { |
43 | 29 char *output; |
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30 char *ou; |
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31 unsigned char *p = (unsigned char *)data; |
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32 unsigned char *dte = p + size; |
16 | 33 |
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34 if (data == NULL || size == 0) return NULL; |
36 | 35 |
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36 ou = output = (char *)malloc(size / 3 * 4 + (size / 57) + 6); |
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37 if (!output) return NULL; |
36 | 38 |
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39 while((dte-p) >= 3) { |
43 | 40 unsigned char x = p[0]; |
41 unsigned char y = p[1]; | |
42 unsigned char z = p[2]; | |
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43 base64_append(&ou, line_count, base64_code_chars[ x >> 2 ]); |
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44 base64_append(&ou, line_count, base64_code_chars[ ((x & 0x03) << 4) | (y >> 4) ]); |
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45 base64_append(&ou, line_count, base64_code_chars[ ((y & 0x0F) << 2) | (z >> 6) ]); |
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46 base64_append(&ou, line_count, base64_code_chars[ z & 0x3F ]); |
43 | 47 p+=3; |
48 }; | |
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49 if ((dte-p) == 2) { |
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50 base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]); |
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51 base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) | (p[1] >> 4) ]); |
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52 base64_append(&ou, line_count, base64_code_chars[ ((p[1] & 0x0F) << 2) ]); |
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53 base64_append(&ou, line_count, '='); |
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54 } else if ((dte-p) == 1) { |
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55 base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]); |
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56 base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) ]); |
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57 base64_append(&ou, line_count, '='); |
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58 base64_append(&ou, line_count, '='); |
43 | 59 }; |
36 | 60 |
43 | 61 *ou=0; |
62 return output; | |
16 | 63 }; |
64 | |
43 | 65 |