| 1 |
// ConfigFile.cpp
|
| 2 |
|
| 3 |
#include "ConfigFile.h"
|
| 4 |
|
| 5 |
using std::string;
|
| 6 |
|
| 7 |
bag_of_string::bag_of_string(std::string s) : std::vector<std::string>::vector() {
|
| 8 |
std::string buffer;
|
| 9 |
size_type pos1 = 0, pos2 = 0, pos2a = 0, pos2b = 0;
|
| 10 |
|
| 11 |
while ( pos2<s.length()-1 )
|
| 12 |
{
|
| 13 |
pos1 = pos2;
|
| 14 |
pos2 = s.find(";", pos1+1);
|
| 15 |
pos2a = s.find("\n", pos1+1);
|
| 16 |
pos2b = s.find(";\n", pos1+1);
|
| 17 |
|
| 18 |
if (pos2a<pos2) pos2=pos2a;
|
| 19 |
if (pos2b<pos2) pos2=pos2b;
|
| 20 |
|
| 21 |
if (pos1>0) pos1+=1;
|
| 22 |
pos1 = s.find_first_not_of(" ", pos1);
|
| 23 |
|
| 24 |
buffer.insert(0, s.substr(pos1, pos2-pos1) );
|
| 25 |
this->push_back(buffer);
|
| 26 |
|
| 27 |
buffer.clear();
|
| 28 |
}
|
| 29 |
}
|
| 30 |
|
| 31 |
|
| 32 |
ConfigFile::ConfigFile( string filename, string delimiter,
|
| 33 |
string comment, string sentry )
|
| 34 |
: myDelimiter(delimiter), myComment(comment), mySentry(sentry)
|
| 35 |
{
|
| 36 |
// Construct a ConfigFile, getting keys and values from given file
|
| 37 |
|
| 38 |
std::ifstream in( filename.c_str() );
|
| 39 |
|
| 40 |
if( !in ) throw file_not_found( filename );
|
| 41 |
|
| 42 |
in >> (*this);
|
| 43 |
}
|
| 44 |
|
| 45 |
|
| 46 |
ConfigFile::ConfigFile()
|
| 47 |
: myDelimiter( string(1,'=') ), myComment( string(1,'#') )
|
| 48 |
{
|
| 49 |
// Construct a ConfigFile without a file; empty
|
| 50 |
}
|
| 51 |
|
| 52 |
|
| 53 |
void ConfigFile::remove( const string& key )
|
| 54 |
{
|
| 55 |
// Remove key and its value
|
| 56 |
myContents.erase( myContents.find( key ) );
|
| 57 |
return;
|
| 58 |
}
|
| 59 |
|
| 60 |
|
| 61 |
bool ConfigFile::keyExists( const string& key ) const
|
| 62 |
{
|
| 63 |
// Indicate whether key is found
|
| 64 |
mapci p = myContents.find( key );
|
| 65 |
return ( p != myContents.end() );
|
| 66 |
}
|
| 67 |
|
| 68 |
|
| 69 |
/* static */
|
| 70 |
void ConfigFile::trim( string& s )
|
| 71 |
{
|
| 72 |
// Remove leading and trailing whitespace
|
| 73 |
static const char whitespace[] = " \n\t\v\r\f";
|
| 74 |
s.erase( 0, s.find_first_not_of(whitespace) );
|
| 75 |
s.erase( s.find_last_not_of(whitespace) + 1U );
|
| 76 |
}
|
| 77 |
|
| 78 |
|
| 79 |
std::ostream& operator<<( std::ostream& os, const ConfigFile& cf )
|
| 80 |
{
|
| 81 |
// Save a ConfigFile to os
|
| 82 |
for( ConfigFile::mapci p = cf.myContents.begin();
|
| 83 |
p != cf.myContents.end();
|
| 84 |
++p )
|
| 85 |
{
|
| 86 |
os << p->first << " " << cf.myDelimiter << " ";
|
| 87 |
os << p->second << std::endl;
|
| 88 |
}
|
| 89 |
return os;
|
| 90 |
}
|
| 91 |
|
| 92 |
|
| 93 |
std::istream& operator>>( std::istream& is, ConfigFile& cf )
|
| 94 |
{
|
| 95 |
// Load a ConfigFile from is
|
| 96 |
// Read in keys and values, keeping internal whitespace
|
| 97 |
typedef string::size_type pos;
|
| 98 |
const string& delim = cf.myDelimiter; // separator
|
| 99 |
const string& comm = cf.myComment; // comment
|
| 100 |
const string& sentry = cf.mySentry; // end of file sentry
|
| 101 |
const pos skip = delim.length(); // length of separator
|
| 102 |
|
| 103 |
string nextline = ""; // might need to read ahead to see where value ends
|
| 104 |
|
| 105 |
while( is || nextline.length() > 0 )
|
| 106 |
{
|
| 107 |
// Read an entire line at a time
|
| 108 |
string line;
|
| 109 |
if( nextline.length() > 0 )
|
| 110 |
{
|
| 111 |
line = nextline; // we read ahead; use it now
|
| 112 |
nextline = "";
|
| 113 |
}
|
| 114 |
else
|
| 115 |
{
|
| 116 |
std::getline( is, line );
|
| 117 |
}
|
| 118 |
|
| 119 |
// Ignore comments
|
| 120 |
line = line.substr( 0, line.find(comm) );
|
| 121 |
|
| 122 |
// Check for end of file sentry
|
| 123 |
if( sentry != "" && line.find(sentry) != string::npos ) return is;
|
| 124 |
|
| 125 |
// Parse the line if it contains a delimiter
|
| 126 |
pos delimPos = line.find( delim );
|
| 127 |
if( delimPos < string::npos )
|
| 128 |
{
|
| 129 |
// Extract the key
|
| 130 |
string key = line.substr( 0, delimPos );
|
| 131 |
line.replace( 0, delimPos+skip, "" );
|
| 132 |
|
| 133 |
// See if value continues on the next line
|
| 134 |
// Stop at blank line, next line with a key, end of stream,
|
| 135 |
// or end of file sentry
|
| 136 |
bool terminate = false;
|
| 137 |
while( !terminate && is )
|
| 138 |
{
|
| 139 |
std::getline( is, nextline );
|
| 140 |
terminate = true;
|
| 141 |
|
| 142 |
string nlcopy = nextline;
|
| 143 |
ConfigFile::trim(nlcopy);
|
| 144 |
if( nlcopy == "" ) continue;
|
| 145 |
|
| 146 |
nextline = nextline.substr( 0, nextline.find(comm) );
|
| 147 |
if( nextline.find(delim) != string::npos )
|
| 148 |
continue;
|
| 149 |
if( sentry != "" && nextline.find(sentry) != string::npos )
|
| 150 |
continue;
|
| 151 |
|
| 152 |
nlcopy = nextline;
|
| 153 |
ConfigFile::trim(nlcopy);
|
| 154 |
if( nlcopy != "" ) line += "\n";
|
| 155 |
line += nextline;
|
| 156 |
terminate = false;
|
| 157 |
}
|
| 158 |
|
| 159 |
// Store key and value
|
| 160 |
ConfigFile::trim(key);
|
| 161 |
ConfigFile::trim(line);
|
| 162 |
cf.myContents[key] = line; // overwrites if key is repeated
|
| 163 |
}
|
| 164 |
}
|
| 165 |
|
| 166 |
return is;
|
| 167 |
}
|
