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annotate src/libstrfunc.c @ 355:d1f930be4711

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From Jeffrey Morlan: pst_build_id_ptr and pst_build_desc_ptr require that the first child of a BTree page have the same starting ID as itself. This is not required by the spec, and is not true in many real-world PSTs (presumably, the original first child of the page got deleted). Because of this, many emails are not being extracted from these PSTs. It also triggers an infinite loop in lspst (a separate bug, also fixed)
author Carl Byington <carl@five-ten-sg.com>
date Wed, 06 Jul 2016 10:12:22 -0700
parents c947b8812120
children
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1
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2 /* Taken from LibStrfunc v7.3 */
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4 #include "define.h"
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7 static char base64_code_chars[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/==";
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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 if (*line_count >= 0) (*line_count)++;
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18 }
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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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28 char *pst_base64_encode_single(void *data, size_t size)
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29 {
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30 int line_count = -1;
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31 return pst_base64_encode_multiple(data, size, &line_count);
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32 }
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35 char *pst_base64_encode_multiple(void *data, size_t size, int *line_count)
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36 {
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37 char *output;
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38 char *ou;
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39 unsigned char *p = (unsigned char *)data;
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40 unsigned char *dte = p + size;
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42 if (data == NULL || size == 0) return NULL;
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44 ou = output = (char *)malloc(size / 3 * 4 + (size / 57) + 6);
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45 if (!output) return NULL;
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47 while((dte-p) >= 3) {
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48 unsigned char x = p[0];
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49 unsigned char y = p[1];
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50 unsigned char z = p[2];
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51 base64_append(&ou, line_count, base64_code_chars[ x >> 2 ]);
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52 base64_append(&ou, line_count, base64_code_chars[ ((x & 0x03) << 4) | (y >> 4) ]);
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53 base64_append(&ou, line_count, base64_code_chars[ ((y & 0x0F) << 2) | (z >> 6) ]);
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54 base64_append(&ou, line_count, base64_code_chars[ z & 0x3F ]);
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55 p+=3;
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56 };
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57 if ((dte-p) == 2) {
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58 base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]);
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59 base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) | (p[1] >> 4) ]);
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60 base64_append(&ou, line_count, base64_code_chars[ ((p[1] & 0x0F) << 2) ]);
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61 base64_append(&ou, line_count, '=');
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62 } else if ((dte-p) == 1) {
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63 base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]);
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64 base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) ]);
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65 base64_append(&ou, line_count, '=');
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66 base64_append(&ou, line_count, '=');
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67 };
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69 *ou=0;
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70 return output;
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71 };
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