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annotate src/libstrfunc.c @ 110:7133b39975f7 stable-0-6-22

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patch from David Cuadrado to process emails with type PST_TYPE_OTHER base64_encode_multiple() may insert newline, needs larger malloc subject lines shorter than 2 bytes could segfault
author Carl Byington <carl@five-ten-sg.com>
date Fri, 28 Nov 2008 11:36:53 -0800
parents 997cf1373f9e
children ab2a11e72250
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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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10 static char base64_code_chars[]="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/==";
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12 void base64_append(char **ou, int *line_count, char data)
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13 {
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14 if (*line_count == 76) {
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15 *(*ou)++ = '\n';
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16 *line_count = 0;
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17 }
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18 *(*ou)++ = data;
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19 (*line_count)++;
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20 }
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22
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23 char *base64_encode(void *data, size_t size)
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24 {
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25 int line_count = 0;
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26 return base64_encode_multiple(data, size, &line_count);
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27 }
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30 char *base64_encode_multiple(void *data, size_t size, int *line_count)
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31 {
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32 char *output;
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33 char *ou;
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34 unsigned char *p = (unsigned char *)data;
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35 unsigned char *dte = p + size;
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36
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37 if (data == NULL || size == 0) return NULL;
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38
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39 ou = output = (char *)malloc(size / 3 * 4 + (size / 57) + 6);
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40 if (!output) return NULL;
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41
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42 while((dte-p) >= 3) {
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43 unsigned char x = p[0];
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44 unsigned char y = p[1];
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45 unsigned char z = p[2];
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46 base64_append(&ou, line_count, base64_code_chars[ x >> 2 ]);
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47 base64_append(&ou, line_count, base64_code_chars[ ((x & 0x03) << 4) | (y >> 4) ]);
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48 base64_append(&ou, line_count, base64_code_chars[ ((y & 0x0F) << 2) | (z >> 6) ]);
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49 base64_append(&ou, line_count, base64_code_chars[ z & 0x3F ]);
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50 p+=3;
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51 };
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52 if ((dte-p) == 2) {
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53 base64_append(&ou, line_count, base64_code_chars[ *p >> 2 ]);
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54 base64_append(&ou, line_count, base64_code_chars[ ((*p & 0x03) << 4) | (p[1] >> 4) ]);
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55 base64_append(&ou, line_count, base64_code_chars[ ((p[1] & 0x0F) << 2) ]);
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56 base64_append(&ou, line_count, '=');
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57 } else if ((dte-p) == 1) {
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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) ]);
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60 base64_append(&ou, line_count, '=');
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61 base64_append(&ou, line_count, '=');
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62 };
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64 *ou=0;
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65 return output;
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66 };
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69 void hexdump(char *hbuf, int start, int stop, int ascii) /* {{{ HexDump all or a part of some buffer */
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70 {
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71 char c;
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72 int diff,i;
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73
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74 while (start < stop ) {
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75 diff = stop - start;
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76 if (diff > 16) diff = 16;
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77
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78 fprintf(stderr, ":%08X ",start);
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80 for (i = 0; i < diff; i++) {
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81 if( 8 == i ) fprintf( stderr, " " );
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82 fprintf(stderr, "%02X ",(unsigned char)*(hbuf+start+i));
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83 }
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84 if (ascii) {
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85 for (i = diff; i < 16; i++) fprintf(stderr, " ");
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86 for (i = 0; i < diff; i++) {
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87 c = *(hbuf+start+i);
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88 fprintf(stderr, "%c", isprint(c) ? c : '.');
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89 }
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90 }
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91 fprintf(stderr, "\n");
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92 start += 16;
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93 }
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94 }