Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib/istream-data.c @ 764:f57c52738f90 HEAD

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Renamed IBuffer and OBuffer to IStream and OStream which describes their functionality better. I tried to keep the variable names and comments also sensible.
author Timo Sirainen <tss@iki.fi>
date Fri, 06 Dec 2002 03:09:22 +0200
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children 0d5be52d7131
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1 /*
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2 istream-data.c : Input stream interface for reading from data buffer
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3
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4 Copyright (c) 2002 Timo Sirainen
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5
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6 Permission is hereby granted, free of charge, to any person obtaining
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7 a copy of this software and associated documentation files (the
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8 "Software"), to deal in the Software without restriction, including
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9 without limitation the rights to use, copy, modify, merge, publish,
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10 distribute, sublicense, and/or sell copies of the Software, and to
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11 permit persons to whom the Software is furnished to do so, subject to
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12 the following conditions:
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13
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14 The above copyright notice and this permission notice shall be
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15 included in all copies or substantial portions of the Software.
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16
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17 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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20 IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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21 CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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22 TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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23 SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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24 */
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25
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26 #include "lib.h"
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27 #include "istream-internal.h"
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28
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29 static void _close(_IOStream *stream __attr_unused__)
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30 {
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31 }
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32
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33 static void _destroy(_IOStream *stream __attr_unused__)
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34 {
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35 }
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36
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37 static void _set_max_buffer_size(_IOStream *stream __attr_unused__,
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38 size_t max_size __attr_unused__)
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39 {
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40 }
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41
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42 static void _set_blocking(_IOStream *stream __attr_unused__,
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43 int timeout_msecs __attr_unused__,
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44 void (*timeout_func)(void *) __attr_unused__,
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45 void *context __attr_unused__)
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46 {
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47 }
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48
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49 static ssize_t _read(_IStream *stream)
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50 {
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51 return stream->pos - stream->skip;
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52 }
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53
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54 static void _seek(_IStream *stream, uoff_t v_offset)
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55 {
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56 stream->skip = v_offset;
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57 stream->istream.v_offset = v_offset;
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58 }
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59
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60 static void _skip(_IStream *stream, uoff_t count)
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61 {
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62 stream->skip += count;
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63 stream->istream.v_offset += count;
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64 }
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65
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66 IStream *i_stream_create_from_data(Pool pool, const unsigned char *data,
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67 size_t size)
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68 {
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69 _IStream *stream;
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70
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71 stream = p_new(pool, _IStream, 1);
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72 stream->buffer = data;
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73 stream->pos = size;
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74
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75 stream->iostream.close = _close;
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76 stream->iostream.destroy = _destroy;
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77 stream->iostream.set_max_buffer_size = _set_max_buffer_size;
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78 stream->iostream.set_blocking = _set_blocking;
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79
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80 stream->read = _read;
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81 stream->skip_count = _skip;
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82 stream->seek = _seek;
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83
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84 return _i_stream_create(stream, pool, -1, 0, size);
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85 }