Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib-imap/imap-utf7.c @ 9595:166a188f9165 HEAD

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mbox: Fields weren't being added to cache file during message saving.
author Timo Sirainen <tss@iki.fi>
date Fri, 30 Jul 2010 16:55:58 +0100
parents 00cd9aacd03c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
9532
00cd9aacd03c Updated copyright notices to include year 2010.
Timo Sirainen <tss@iki.fi>
parents: 8590
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1 /* Copyright (c) 2008-2010 Dovecot authors, see the included COPYING file */
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2
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3 #include "lib.h"
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4 #include "str.h"
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5 #include "unichar.h"
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6 #include "imap-utf7.h"
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7
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8 static const char imap_b64enc[] =
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9 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+,";
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10
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11 #define XX 0xff
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12 static const unsigned char imap_b64dec[256] = {
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13 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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14 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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15 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,62, 63,XX,XX,XX,
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16 52,53,54,55, 56,57,58,59, 60,61,XX,XX, XX,XX,XX,XX,
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17 XX, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11,12,13,14,
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18 15,16,17,18, 19,20,21,22, 23,24,25,XX, XX,XX,XX,XX,
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19 XX,26,27,28, 29,30,31,32, 33,34,35,36, 37,38,39,40,
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20 41,42,43,44, 45,46,47,48, 49,50,51,XX, XX,XX,XX,XX,
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21 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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22 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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23 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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24 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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25 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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26 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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27 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX,
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28 XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX, XX,XX,XX,XX
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29 };
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30
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31 static void
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32 mbase64_encode(string_t *dest, const unsigned char *in, unsigned int len)
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33 {
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34 str_append_c(dest, '&');
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35 while (len >= 3) {
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36 str_append_c(dest, imap_b64enc[in[0] >> 2]);
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37 str_append_c(dest, imap_b64enc[((in[0] & 3) << 4) |
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38 (in[1] >> 4)]);
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39 str_append_c(dest, imap_b64enc[((in[1] & 0x0f) << 2) |
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40 ((in[2] & 0xc0) >> 6)]);
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41 str_append_c(dest, imap_b64enc[in[2] & 0x3f]);
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42 in += 3;
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43 len -= 3;
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44 }
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45 if (len > 0) {
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46 str_append_c(dest, imap_b64enc[in[0] >> 2]);
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47 if (len == 1)
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48 str_append_c(dest, imap_b64enc[(in[0] & 0x03) << 4]);
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49 else {
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50 str_append_c(dest, imap_b64enc[((in[0] & 0x03) << 4) |
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51 (in[1] >> 4)]);
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52 str_append_c(dest, imap_b64enc[(in[1] & 0x0f) << 2]);
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53 }
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54 }
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55 str_append_c(dest, '-');
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56 }
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57
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58 int imap_utf8_to_utf7(const char *src, string_t *dest)
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59 {
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60 const char *p;
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61 unichar_t chr;
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62 uint8_t *utf16, *u;
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63 uint16_t u16;
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64
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65 for (p = src; *p != '\0'; p++) {
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66 if (*p == '&' || (unsigned char)*p >= 0x80)
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67 break;
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68 }
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69 if (*p == '\0') {
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70 /* no ASCII characters that need to be encoded */
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71 str_append(dest, src);
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72 return 0;
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73 }
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74
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75 /* at least one encoded character */
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76 str_append_n(dest, src, p-src);
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77 utf16 = t_malloc(strlen(p)*2);
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78 while (*p != '\0') {
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79 if (*p == '&') {
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80 str_append(dest, "&-");
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81 p++;
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82 continue;
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83 }
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84 if ((unsigned char)*p < 0x80) {
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85 str_append_c(dest, *p);
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86 p++;
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87 continue;
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88 }
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89
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90 u = utf16;
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91 while ((unsigned char)*p >= 0x80) {
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92 if (uni_utf8_get_char(p, &chr) <= 0)
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93 return -1;
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94 /* @UNSAFE */
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95 if (chr < UTF16_SURROGATE_BASE) {
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96 *u++ = chr >> 8;
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97 *u++ = chr & 0xff;
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98 } else {
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99 u16 = UTF16_SURROGATE_HIGH(chr);
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100 *u++ = u16 >> 8;
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101 *u++ = u16 & 0xff;
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102 u16 = UTF16_SURROGATE_LOW(chr);
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103 *u++ = u16 >> 8;
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104 *u++ = u16 & 0xff;
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105 }
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106 p += uni_utf8_char_bytes(*p);
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107 }
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108 mbase64_encode(dest, utf16, u-utf16);
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109 }
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110 return 0;
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111 }
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112
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113 static int utf16buf_to_utf8(string_t *dest, const unsigned char output[4],
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114 unsigned int *_pos, unsigned int len)
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115 {
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116 unsigned int pos = *_pos;
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117 uint16_t high, low;
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118 unichar_t chr;
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119
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120 if (len % 2 != 0)
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121 return -1;
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122
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123 high = (output[pos % 4] << 8) | output[(pos+1) % 4];
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124 if (high < UTF16_SURROGATE_HIGH_FIRST ||
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125 high > UTF16_SURROGATE_HIGH_MAX) {
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126 /* single byte */
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127 uni_ucs4_to_utf8_c(high, dest);
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128 *_pos = (pos + 2) % 4;
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129 return 0;
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diff changeset
130 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
131
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
132 if (high > UTF16_SURROGATE_HIGH_LAST)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
133 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
134 if (len != 4) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
135 /* missing the second character */
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
136 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
137 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
138
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
139 low = (output[(pos+2)%4] << 8) | output[(pos+3) % 4];
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
140 if (low < UTF16_SURROGATE_LOW_FIRST || low > UTF16_SURROGATE_LOW_LAST)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
141 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
142
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
143 chr = UTF16_SURROGATE_BASE +
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
144 (((high & UTF16_SURROGATE_MASK) << UTF16_SURROGATE_SHIFT) |
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
145 (low & UTF16_SURROGATE_MASK));
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
146 uni_ucs4_to_utf8_c(chr, dest);
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
147 return 0;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
148 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
149
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
150 static int mbase64_decode_to_utf8(string_t *dest, const char **_src)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
151 {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
152 const char *src = *_src;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
153 unsigned char input[4], output[4];
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
154 unsigned int outstart = 0, outpos = 0;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
155
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
156 while (*src != '-') {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
157 input[0] = imap_b64dec[(uint8_t)src[0]];
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
158 input[1] = imap_b64dec[(uint8_t)src[1]];
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
159 if (input[0] == 0xff || input[1] == 0xff)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
160 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
161
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
162 output[outpos % 4] = (input[0] << 2) | (input[1] >> 4);
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
163 if (++outpos % 4 == outstart) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
164 if (utf16buf_to_utf8(dest, output, &outstart, 4) < 0)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
165 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
166 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
167
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
168 input[2] = imap_b64dec[(uint8_t)src[2]];
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
169 if (input[2] == 0xff) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
170 if (src[2] != '-')
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
171 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
172
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
173 src += 2;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
174 break;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
175 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
176
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
177 output[outpos % 4] = (input[1] << 4) | (input[2] >> 2);
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
178 if (++outpos % 4 == outstart) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
179 if (utf16buf_to_utf8(dest, output, &outstart, 4) < 0)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
180 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
181 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
182
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
183 input[3] = imap_b64dec[(uint8_t)src[3]];
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
184 if (input[3] == 0xff) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
185 if (src[3] != '-')
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
186 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
187
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
188 src += 3;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
189 break;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
190 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
191
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
192 output[outpos % 4] = ((input[2] << 6) & 0xc0) | input[3];
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
193 if (++outpos % 4 == outstart) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
194 if (utf16buf_to_utf8(dest, output, &outstart, 4) < 0)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
195 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
196 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
197
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
198 src += 4;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
199 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
200 if (outstart != outpos % 4) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
201 if (utf16buf_to_utf8(dest, output, &outstart,
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
202 (4 + outpos - outstart) % 4) < 0)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
203 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
204 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
205
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
206 /* found ending '-' */
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
207 *_src = src + 1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
208 return 0;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
209 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
210
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
211 int imap_utf7_to_utf8(const char *src, string_t *dest)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
212 {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
213 const char *p;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
214
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
215 for (p = src; *p != '\0'; p++) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
216 if (*p == '&' || (unsigned char)*p >= 0x80)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
217 break;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
218 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
219 if (*p == '\0') {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
220 /* no IMAP-UTF-7 encoded characters */
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
221 str_append(dest, src);
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
222 return 0;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
223 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
224 if ((unsigned char)*p >= 0x80) {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
225 /* 8bit characters - the input is broken */
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
226 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
227 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
228
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
229 /* at least one encoded character */
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
230 str_append_n(dest, src, p-src);
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
231 while (*p != '\0') {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
232 if (*p == '&') {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
233 if (*++p == '-') {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
234 str_append_c(dest, '&');
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
235 p++;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
236 } else {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
237 if (mbase64_decode_to_utf8(dest, &p) < 0)
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
238 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
239 if (p[0] == '&' && p[1] != '-') {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
240 /* &...-& */
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
241 return -1;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
242 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
243 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
244 } else {
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
245 str_append_c(dest, *p++);
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
246 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
247 }
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
248 return 0;
81c0fe5bd635 Added code for encoding and decoding IMAP's modified-UTF7 strings.
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
249 }