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support bit vects <-> byte strings

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This commit is contained in:
Greg Landrum
2012-01-08 06:12:47 +00:00
parent 22a96cd126
commit b6300a86fe
8 changed files with 147 additions and 8 deletions
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51
Code/DataStructs/BitOps.cpp
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@@ -654,23 +654,48 @@ const char bin2Hex[] = {'0','1','2','3','4','5','6','7','8','9','a','b','c','d',
template <typename T1>
std::string
BitVectToFPSText(const T1& bv1){
std::stringstream res;
std::string res(bv1.getNumBits()/4 + (bv1.getNumBits()%4?1:0),0);
unsigned char c=0;
unsigned int byte=0;
for(unsigned int i=0;i<bv1.getNumBits();i++){
if(bv1.getBit(i)) {
c |= 1<<(i%8);
}
if(!((i+1)%8)){
res<<bin2Hex[(c>>4)%16]<<bin2Hex[c%16];
res[byte++]=bin2Hex[(c>>4)%16];
res[byte++]=bin2Hex[c%16];
c=0;
}
}
if(bv1.getNumBits()%8){
res<<bin2Hex[(c>>4)%16]<<bin2Hex[c%16];
res[byte++]=bin2Hex[(c>>4)%16];
res[byte++]=bin2Hex[c%16];
}
return res.str();
return res;
}
template <typename T1>
std::string
BitVectToBinaryText(const T1& bv1){
std::string res(bv1.getNumBits()/8 + (bv1.getNumBits()%8?1:0),0);
unsigned char c=0;
unsigned int byte=0;
for(unsigned int i=0;i<bv1.getNumBits();i++){
if(bv1.getBit(i)) {
c |= 1<<(i%8);
}
if(!((i+1)%8)){
res[byte++]=c;
c=0;
}
}
if(bv1.getNumBits()%8){
res[byte]=c;
}
return res;
}
template <typename T1>
void
UpdateBitVectFromFPSText(T1& bv1,const std::string &fps){
@@ -693,6 +718,18 @@ UpdateBitVectFromFPSText(T1& bv1,const std::string &fps){
}
}
template <typename T1>
void
UpdateBitVectFromBinaryText(T1& bv1,const std::string &fps){
PRECONDITION(fps.length()*8<=bv1.getNumBits(),"bad FPS length");
PRECONDITION(fps.length()%2==0,"bad FPS length");
for(unsigned int i=0;i<fps.size();i++){
unsigned short c=fps[i];
for(unsigned int bit=0;bit<8;++bit){
if(c&(1<<bit)) bv1.setBit(i*8+bit);
}
}
}
template double TanimotoSimilarity(const SparseBitVect& bv1,const SparseBitVect& bv2);
@@ -740,10 +777,14 @@ template std::string BitVectToText(const ExplicitBitVect &);
template std::string BitVectToFPSText(const SparseBitVect &);
template std::string BitVectToFPSText(const ExplicitBitVect &);
template void UpdateBitVectFromFPSText(SparseBitVect &,const std::string &);
template void UpdateBitVectFromFPSText(ExplicitBitVect &,const std::string &);
template std::string BitVectToBinaryText(const SparseBitVect &);
template std::string BitVectToBinaryText(const ExplicitBitVect &);
template void UpdateBitVectFromBinaryText(SparseBitVect &,const std::string &);
template void UpdateBitVectFromBinaryText(ExplicitBitVect &,const std::string &);