wasCSharpSQLite – Blame information for rev 1
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1 | office | 1 | // Port of the ChannelBuffer struct from tclIO.h/tclIO.c |
2 | // and associated functionality |
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3 | // |
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4 | // Included in SQLite3 port to C# for use in testharness only; 2008 Noah B Hart |
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5 | //$Header$ |
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6 | |||
7 | using System; |
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8 | namespace tcl.lang |
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9 | { |
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10 | |||
11 | class ChannelBuffer |
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12 | { |
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13 | |||
14 | // The next position into which a character |
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15 | // will be put in the buffer. |
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16 | |||
17 | internal int nextAdded; |
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18 | |||
19 | // Position of next byte to be removed |
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20 | // from the buffer. |
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21 | |||
22 | internal int nextRemoved; |
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23 | |||
24 | // How big is the buffer? |
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25 | |||
26 | internal int bufLength; |
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27 | |||
28 | // Next buffer in chain. |
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29 | |||
30 | internal ChannelBuffer next; |
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31 | |||
32 | // The actual bytes stored in the buffer |
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33 | |||
34 | internal byte[] buf; |
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35 | |||
36 | // A channel buffer has BUFFER_PADDING bytes extra at beginning to |
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37 | // hold any bytes of a native-encoding character that got split by |
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38 | // the end of the previous buffer and need to be moved to the |
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39 | // beginning of the next buffer to make a contiguous string so it |
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40 | // can be converted to UTF-8. |
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41 | // |
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42 | // A channel buffer has BUFFER_PADDING bytes extra at the end to |
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43 | // hold any bytes of a native-encoding character (generated from a |
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44 | // UTF-8 character) that overflow past the end of the buffer and |
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45 | // need to be moved to the next buffer. |
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46 | |||
47 | internal const int BUFFER_PADDING = 16; |
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48 | |||
49 | /// <summary> AllocChannelBuffer -> ChannelBuffer |
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50 | /// |
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51 | /// Create a new ChannelBuffer object |
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52 | /// </summary> |
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53 | |||
54 | internal ChannelBuffer( int length ) |
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55 | { |
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56 | int n; |
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57 | |||
58 | n = length + BUFFER_PADDING + BUFFER_PADDING; |
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59 | buf = new byte[n]; |
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60 | nextAdded = BUFFER_PADDING; |
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61 | nextRemoved = BUFFER_PADDING; |
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62 | bufLength = length + BUFFER_PADDING; |
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63 | next = null; |
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64 | } |
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65 | } |
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66 | } |