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#include <stdexcept>
#include <sstream>
#include "util.h"
static inline std::string trim(const std::string &s)
{
auto isspace = [] (char c) -> bool { return c == ' ' || c == '\t' || c == '\r' || c == '\n'; };
size_t front = 0;
while(isspace(s[front]))
++front;
size_t back = s.size() - 1;
while(back > front && isspace(s[back]))
--back;
return s.substr(front, back - front + 1);
}
std::string read_setting(const std::string &name, std::istream &is)
{
char linebuf[512];
while (is.good()) {
is.getline(linebuf, sizeof(linebuf));
for(char *p = linebuf; *p; p++) {
if(*p != '#')
continue;
*p = '\0'; // Cut off at the first #
break;
}
std::string line(linebuf);
auto pos = line.find('=');
if (pos == std::string::npos)
continue;
auto key = trim(line.substr(0, pos));
if (key != name)
continue;
return trim(line.substr(pos+1));
}
std::ostringstream oss;
oss << "Setting '" << name << "' not found";
throw std::runtime_error(oss.str());
}
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