Mercurial > libpst
annotate src/libstrfunc.c @ 213:4a659f3138b7
fix pst2dii for shared library changes
author | Carl Byington <carl@five-ten-sg.com> |
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date | Mon, 08 Jun 2009 14:47:39 -0700 |
parents | 6954d315aaa8 |
children | c947b8812120 |
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16 | 1 |
2 /* Taken from LibStrfunc v7.3 */ | |
3 | |
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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 static void base64_append(char **ou, int *line_count, char data); |
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10 static void base64_append(char **ou, int *line_count, char data) |
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11 { |
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12 if (*line_count == 76) { |
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13 *(*ou)++ = '\n'; |
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14 *line_count = 0; |
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15 } |
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16 *(*ou)++ = data; |
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17 (*line_count)++; |
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18 } |
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19 |
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20 |
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21 char *pst_base64_encode(void *data, size_t size) |
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22 { |
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23 int line_count = 0; |
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24 return pst_base64_encode_multiple(data, size, &line_count); |
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25 } |
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26 |
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27 |
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28 char *pst_base64_encode_multiple(void *data, size_t size, int *line_count) |
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29 { |
43 | 30 char *output; |
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31 char *ou; |
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32 unsigned char *p = (unsigned char *)data; |
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33 unsigned char *dte = p + size; |
16 | 34 |
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35 if (data == NULL || size == 0) return NULL; |
36 | 36 |
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37 ou = output = (char *)malloc(size / 3 * 4 + (size / 57) + 6); |
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38 if (!output) return NULL; |
36 | 39 |
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40 while((dte-p) >= 3) { |
43 | 41 unsigned char x = p[0]; |
42 unsigned char y = p[1]; | |
43 unsigned char z = p[2]; | |
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44 base64_append(&ou, line_count, base64_code_chars[ x >> 2 ]); |
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45 base64_append(&ou, line_count, base64_code_chars[ ((x & 0x03) << 4) | (y >> 4) ]); |
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46 base64_append(&ou, line_count, base64_code_chars[ ((y & 0x0F) << 2) | (z >> 6) ]); |
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47 base64_append(&ou, line_count, base64_code_chars[ z & 0x3F ]); |
43 | 48 p+=3; |
49 }; | |
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50 if ((dte-p) == 2) { |
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51 base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]); |
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52 base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) | (p[1] >> 4) ]); |
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53 base64_append(&ou, line_count, base64_code_chars[ ((p[1] & 0x0F) << 2) ]); |
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54 base64_append(&ou, line_count, '='); |
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55 } else if ((dte-p) == 1) { |
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56 base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]); |
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57 base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) ]); |
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58 base64_append(&ou, line_count, '='); |
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59 base64_append(&ou, line_count, '='); |
43 | 60 }; |
36 | 61 |
43 | 62 *ou=0; |
63 return output; | |
16 | 64 }; |
65 | |
43 | 66 |