/usr/include/CLucene/util/subinputstream.h is in libclucene-dev 0.9.21b-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 | /*------------------------------------------------------------------------------
* Copyright (C) 2003-2006 Jos van den Oever
*
* Distributable under the terms of either the Apache License (Version 2.0) or
* the GNU Lesser General Public License, as specified in the COPYING file.
------------------------------------------------------------------------------*/
/* This file is part of Strigi Desktop Search
*
* Copyright (C) 2006 Jos van den Oever <jos@vandenoever.info>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef SUBINPUTSTREAM_H
#define SUBINPUTSTREAM_H
#include "streambase.h"
namespace jstreams {
template<class T>
class SubInputStream : public StreamBase<T> {
private:
const int64_t offset;
StreamBase<T> *input;
public:
SubInputStream(StreamBase<T> *input, int64_t size=-1);
int32_t read(const T*& start, int32_t min, int32_t max);
int64_t reset(int64_t newpos);
int64_t skip(int64_t ntoskip);
};
template<class T>
SubInputStream<T>::SubInputStream(StreamBase<T> *i, int64_t length)
: offset(i->getPosition()), input(i) {
assert(length >= -1);
// printf("substream offset: %lli\n", offset);
StreamBase<T>::size = length;
}
template<class T>
int32_t SubInputStream<T>::read(const T*& start, int32_t min, int32_t max) {
if (StreamBase<T>::size != -1) {
const int64_t left = StreamBase<T>::size - StreamBase<T>::position;
if (left == 0) {
return -1;
}
// restrict the amount of data that can be read
if (max <= 0 || max > left) {
max = (int32_t)left;
}
if (min > max) min = max;
if (left < min) min = (int32_t)left;
}
int32_t nread = input->read(start, min, max);
if (nread < -1) {
fprintf(stderr, "substream too short.\n");
StreamBase<T>::status = Error;
StreamBase<T>::error = input->getError();
} else if (nread < min) {
if (StreamBase<T>::size == -1) {
StreamBase<T>::status = Eof;
if (nread > 0) {
StreamBase<T>::position += nread;
StreamBase<T>::size = StreamBase<T>::position;
}
} else {
// fprintf(stderr, "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! nread %i min %i max %i size %lli\n", nread, min, max, size);
// fprintf(stderr, "pos %lli parentpos %lli\n", position, input->getPosition());
// fprintf(stderr, "status: %i error: %s\n", input->getStatus(), input->getError());
// we expected data but didn't get enough so that's an error
StreamBase<T>::status = Error;
StreamBase<T>::error = "Premature end of stream\n";
nread = -2;
}
} else {
StreamBase<T>::position += nread;
if (StreamBase<T>::position == StreamBase<T>::size) {
StreamBase<T>::status = Eof;
}
}
return nread;
}
template<class T>
int64_t SubInputStream<T>::reset(int64_t newpos) {
// fprintf(stderr, "subreset pos: %lli newpos: %lli offset: %lli\n", position,
// newpos, offset);
StreamBase<T>::position = input->reset(newpos + offset);
if (StreamBase<T>::position < offset) {
printf("###########\n");
StreamBase<T>::status = Error;
StreamBase<T>::error = input->getError();
} else {
StreamBase<T>::position -= offset;
StreamBase<T>::status = input->getStatus();
}
return StreamBase<T>::position;
}
template<class T>
int64_t SubInputStream<T>::skip(int64_t ntoskip) {
// printf("subskip pos: %lli ntoskip: %lli offset: %lli\n", position, ntoskip, offset);
if (StreamBase<T>::size == StreamBase<T>::position) {
StreamBase<T>::status = Eof;
return -1;
}
if (StreamBase<T>::size != -1) {
const int64_t left = StreamBase<T>::size - StreamBase<T>::position;
// restrict the amount of data that can be skipped
if (ntoskip > left) {
ntoskip = left;
}
}
int64_t skipped = input->skip(ntoskip);
if (input->getStatus() == Error) {
StreamBase<T>::status = Error;
StreamBase<T>::error = input->getError();
} else {
StreamBase<T>::position += skipped;
if (StreamBase<T>::position == StreamBase<T>::size) {
StreamBase<T>::status = Eof;
}
}
return skipped;
}
} //end namespace jstreams
#endif
|