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/*
* Simple config/test file reader
* (C) 2013 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/parsing.h>
#include <boost/algorithm/string.hpp>
namespace Botan {
void lex_cfg(std::istream& is,
std::function<void (std::string)> cb)
{
while(is.good())
{
std::string s;
std::getline(is, s);
while(is.good() && s.back() == '\\')
{
boost::trim_if(s, boost::is_any_of("\\\n"));
std::string x;
std::getline(is, x);
boost::trim_left(x);
s += x;
}
auto comment = s.find('#');
if(comment)
s = s.substr(0, comment);
if(s.empty())
continue;
std::vector<std::string> parts;
boost::split(parts, s, boost::is_any_of(" \t\n"), boost::token_compress_on);
for(auto p : parts)
{
if(p.empty())
continue;
auto eq = p.find("=");
if(eq == std::string::npos || p.size() < 2)
{
cb(p);
}
else if(eq == 0)
{
cb("=");
cb(p.substr(1, std::string::npos));
}
else if(eq == p.size() - 1)
{
cb(p.substr(0, p.size() - 1));
cb("=");
}
else if(eq != std::string::npos)
{
cb(p.substr(0, eq));
cb("=");
cb(p.substr(eq + 1, std::string::npos));
}
}
}
}
void lex_cfg_w_headers(std::istream& is,
std::function<void (std::string)> cb,
std::function<void (std::string)> hdr_cb)
{
auto intercept = [cb,hdr_cb](const std::string& s)
{
if(s[0] == '[' && s[s.length()-1] == ']')
hdr_cb(s.substr(1, s.length()-2));
else
cb(s);
};
lex_cfg(is, intercept);
}
std::map<std::string, std::map<std::string, std::string>>
parse_cfg(std::istream& is)
{
std::string header = "default";
std::map<std::string, std::map<std::string, std::string>> vals;
std::string key;
auto header_cb = [&header](const std::string i) { header = i; };
auto cb = [&header,&key,&vals](const std::string s)
{
if(s == "=")
{
BOTAN_ASSERT(!key.empty(), "Valid assignment in config");
}
else if(key.empty())
key = s;
else
{
vals[header][key] = s;
key = "";
}
};
lex_cfg_w_headers(is, cb, header_cb);
return vals;
}
}
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