int countWords (const char string[])
{
int i, wordCount = 0;
bool lookingForWord = true, wordchar (const char c), numchar (const char c);
for ( i = 0; string[i] != '\0'; ++i )
if ( wordchar (string[i]) || numchar (string[i]) )
{
if ( lookingForWord )
{
++wordCount;
lookingForWord = false;
}
}
else
lookingForWord = true;
return wordCount;
}
node::number_holder::number_holder(const std::string& expr, size_t& ptr, size_t len)
{
//-?(0|1-9[0-9]+)(.[0-9]+)?([eE][+-]?[0-9]+)?
int state = 0;
size_t tmp = ptr;
size_t tmp2 = ptr;
std::string x;
while(tmp < len) {
unsigned c = numchar(expr[tmp]);
unsigned ns = (numdfa[state] >> (4 * c)) & 0xF;
if(ns == 0xF)
break;
else
state = ns;
tmp++;
}
if(!(numdfa[state] >> 28))
goto bad;
x = expr.substr(ptr, tmp - ptr);
ptr = tmp;
try {
if(regex_match("[0-9]+", x)) {
n.n1 = parse_value<uint64_t>(x);
sub = 1;
return;
}
} catch(...) {}
try {
if(regex_match("[+-]?[0-9]+", x)) {
n.n2 = parse_value<int64_t>(x);
sub = 2;
return;
}
} catch(...) {}
try {
n.n0 = parse_value<double>(x);
sub = 0;
return;
} catch(...) {}
bad:
throw error(ERR_INVALID_NUMBER, PARSE_NUMBER, tmp2);
}