void catfile(istream& infile, const string& filename,
str_str_map& list) {
static string colons{": "};
int line_num = 0;
for(;;) {
string line;
getline (infile, line);
if(infile.eof()) break;
cout << filename << colons << ++line_num
<< colons << line << endl;
line = trim(line);
if(line.size() == 0 or line[0] == '#')
continue;
size_t pos = line.find_first_of("=");
if(pos == string::npos) {
auto itor = list.find(line);
if(itor != list.end())
cout << itor->first << " = " << itor->second << endl;
else
cout << line << ": key not found" << endl;
} else {
string key = trim(line.substr(0, pos == 0 ? 0 : pos));
string value = trim(line.substr(pos + 1));
if(!key.empty() && !value.empty()) {
list.insert({key, value});
cout << key << " = " << value << endl;
} else if(!key.empty() && value.empty()) {
auto itor = list.find(key);
if(itor != list.end())
list.erase(itor);
} else if(key.empty() && !value.empty()) {
for(auto itor = list.begin(); itor != list.end(); ++itor) {
if(itor->second == value)
cout << itor->first << " = " << itor->second << endl;
}
} else {
for(auto itor = list.begin(); itor != list.end(); ++itor) {
cout << itor->first << " = " << itor->second << endl;
}
}
}
}
}
void read(istream& in, str_str_map& map, string filename="-"){
string line; int line_number{1};
string key, value; bool equals;
while(getline(in,line)){
cout << filename << ": " << line_number++
<< ": " << line << endl;
trim_space(line);
if (line.length() == 0 || line[0] == '#') continue;
key = trim_key(line); value = trim_value(line);
equals = !(line == key);
if (key.length() == 0 and value.length() == 0){
for (auto iter = map.begin(); iter != map.end(); ++iter){
cout << (*iter).first << " = " << (*iter).second << endl;
}
} else if(key.length() > 0 && value.length() > 0){
cout << key << " = " << value << endl;
map.insert(str_str_pair(key,value));
} else if (key.length() > 0){
if (equals){
auto locate = map.find(str_str_pair(key,value));
if (locate != map.end()) { map.erase(locate); continue; }}
else{
auto locate = map.find(str_str_pair(key,value));
if (locate != map.end()){
cout << (*locate).first << " = "
<< (*locate).second << endl;
continue;
}
cout << key << ": key not found" << endl;
}
} else if (value.length() > 0 and equals){
str_str_map::iterator search = map.begin();
for(;search != map.end(); ++search){
if(search->second == value){
cout << (*search).first << " = "
<< (*search).second << endl;
}
}
}
}
}