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adjustments to floating-point printing

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This commit is contained in:
caheckman 2020-06-03 17:48:52 -04:00
parent 91ef0680da
commit a027a5cdd8
3 changed files with 46 additions and 13 deletions
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47
Ghidra/Features/Decompiler/src/decompile/cpp/printc.cc
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@ -1087,38 +1087,59 @@ void PrintC::push_integer(uintb val,int4 sz,bool sign,
/// \param op is the PcodeOp using the value
void PrintC::push_float(uintb val,int4 sz,const Varnode *vn,const PcodeOp *op)
{
ostringstream t;
string token;
const FloatFormat *format = glb->translate->getFloatFormat(sz);
if (format == (const FloatFormat *)0) {
t << "FLOAT_UNKNOWN";
token = "FLOAT_UNKNOWN";
}
else {
FloatFormat::floatclass type;
double floatval = format->getHostFloat(val,&type);
if (type == FloatFormat::infinity) {
if (format->extractSign(val))
t << '-';
t << "INFINITY";
token = "-INFINITY";
else
token = "INFINITY";
}
else if (type == FloatFormat::nan) {
if (format->extractSign(val))
t << '-';
t << "NAN";
token = "-NAN";
else
token = "NAN";
}
else {
if ((mods & force_scinote)!=0)
ostringstream t;
if ((mods & force_scinote)!=0) {
t.setf( ios::scientific ); // Set to scientific notation
else
t.setf( ios::fixed ); // Otherwise use fixed notation
t.precision(8); // Number of digits of precision
t << floatval;
t.precision(format->getDecimalPrecision()-1);
t << floatval;
token = t.str();
}
else {
// Try to print "minimal" accurate representation of the float
t.unsetf( ios::floatfield ); // Use "default" notation
t.precision(format->getDecimalPrecision());
t << floatval;
token = t.str();
bool looksLikeFloat = false;
for(int4 i=0;i<token.size();++i) {
char c = token[i];
if (c == '.' || c == 'e') {
looksLikeFloat = true;
break;
}
}
if (!looksLikeFloat) {
token += ".0"; // Force token to look like a floating-point value
}
}
}
}
if (vn==(const Varnode *)0)
pushAtom(Atom(t.str(),syntax,EmitXml::const_color,op));
pushAtom(Atom(token,syntax,EmitXml::const_color,op));
else
pushAtom(Atom(t.str(),vartoken,EmitXml::const_color,op,vn));
pushAtom(Atom(token,vartoken,EmitXml::const_color,op,vn));
}
void PrintC::printUnicode(ostream &s,int4 onechar) const