1 | /* |
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2 | * Copyright (c) 2003-2004, Artem B. Bityuckiy |
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3 | * Copyright (c) 1999,2000, Konstantin Chuguev. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * |
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14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
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15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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24 | * SUCH DAMAGE. |
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25 | */ |
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26 | #include <_ansi.h> |
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27 | #include <reent.h> |
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28 | #include <sys/types.h> |
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29 | #include <errno.h> |
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30 | #include <stdlib.h> |
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31 | #include <string.h> |
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32 | #include "local.h" |
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33 | #include "conv.h" |
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34 | |
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35 | static int null_conversion_dummy_data; |
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36 | |
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37 | |
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38 | static void * |
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39 | null_conversion_open (struct _reent *rptr, |
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40 | const char *to, |
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41 | const char *from) |
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42 | { |
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43 | return (void *)&null_conversion_dummy_data; |
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44 | } |
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45 | |
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46 | |
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47 | static size_t |
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48 | null_conversion_close (struct _reent *rptr, |
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49 | void *data) |
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50 | { |
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51 | return 0; |
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52 | } |
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53 | |
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54 | |
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55 | static size_t |
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56 | null_conversion_convert (struct _reent *rptr, |
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57 | void *data, |
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58 | const unsigned char **inbuf, |
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59 | size_t *inbytesleft, |
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60 | unsigned char **outbuf, |
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61 | size_t *outbytesleft, |
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62 | int flags) |
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63 | { |
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64 | size_t result; |
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65 | size_t len; |
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66 | |
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67 | if (*inbytesleft < *outbytesleft) |
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68 | { |
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69 | result = 0; |
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70 | len = *inbytesleft; |
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71 | } |
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72 | else |
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73 | { |
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74 | result = (size_t)-1; |
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75 | len = *outbytesleft; |
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76 | __errno_r (rptr) = E2BIG; |
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77 | } |
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78 | |
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79 | if ((flags & 1) == 0) |
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80 | memcpy (*outbuf, *inbuf, len); |
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81 | |
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82 | *inbuf += len; |
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83 | *outbuf += len; |
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84 | *inbytesleft -= len; |
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85 | *outbytesleft -= len; |
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86 | |
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87 | return result; |
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88 | } |
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89 | |
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90 | |
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91 | static int |
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92 | null_conversion_get_mb_cur_max (void *data, |
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93 | int direction) |
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94 | { |
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95 | return ICONV_MB_LEN_MAX; |
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96 | } |
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97 | |
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98 | |
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99 | static void |
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100 | null_conversion_get_state (void *data, |
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101 | mbstate_t *state, |
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102 | int direction) |
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103 | { |
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104 | return; |
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105 | } |
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106 | |
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107 | |
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108 | static int |
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109 | null_conversion_set_state (void *data, |
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110 | mbstate_t *state, |
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111 | int direction) |
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112 | { |
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113 | return 0; |
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114 | } |
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115 | |
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116 | static int |
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117 | null_conversion_is_stateful (void *data, |
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118 | int direction) |
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119 | { |
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120 | return 0; |
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121 | } |
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122 | |
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123 | /* Null conversion definition object */ |
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124 | const iconv_conversion_handlers_t |
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125 | _iconv_null_conversion_handlers = |
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126 | { |
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127 | null_conversion_open, |
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128 | null_conversion_close, |
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129 | null_conversion_convert, |
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130 | null_conversion_get_state, |
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131 | null_conversion_set_state, |
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132 | null_conversion_get_mb_cur_max, |
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133 | null_conversion_is_stateful |
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134 | }; |
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135 | |
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