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76 lines
3.0 KiB
C++
76 lines
3.0 KiB
C++
#ifndef STRTABDATA_H
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#define STRTABDATA_H
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/*
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Copyright (C) 2010-2013 David Anderson. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the example nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY David Anderson ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL David Anderson BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// strtabdata.h
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// Creates a string table in a way consistent with
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// elf string tables. The zero index is a null byte always.
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class strtabdata {
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public:
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strtabdata(): data_(new char[1000]),
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datalen_(1000), nexttouse_(0) { data_[0] = 0; nexttouse_ = 1;};
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~strtabdata() { delete[]data_; };
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unsigned addString(const std::string & newstr) {
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// The 1 is for the terminating null byte.
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unsigned nsz = newstr.size() +1;
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unsigned needed = nexttouse_ + nsz;
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if (needed >= datalen_) {
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unsigned baseincr = nsz;
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unsigned altincr = datalen_*2;
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if(altincr> baseincr) {
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baseincr = altincr;
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}
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unsigned newsize = datalen_ + baseincr;
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char *newdata = new char [newsize];
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memcpy(newdata, data_, nexttouse_);
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delete [] data_;
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data_ = newdata;
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datalen_ = newsize;
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}
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memcpy(data_ + nexttouse_, newstr.c_str(),nsz);
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unsigned newstrindex = nexttouse_;
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nexttouse_ += nsz;
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return newstrindex;
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};
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void *exposedata() {return (void *)data_;};
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unsigned exposelen() const {return nexttouse_;};
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private:
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char * data_;
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// datalen_ is the size in bytes pointed to by data_ .
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unsigned datalen_;
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// nexttouse_ is the index of the next (unused) byte in
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// data_ , so it is also the amount of space in data_ that
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// is in use.
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unsigned nexttouse_;
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};
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#endif /* STRTABDATA_H */
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