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inireader.cpp
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inireader.cpp
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// Read an INI file into easy-to-access name/value pairs.
// inih and INIReader are released under the New BSD license:
//
// Copyright (c) 2009, Ben Hoyt
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of Ben Hoyt nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY BEN HOYT ''AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL BEN HOYT BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Go to the project home page for more info: https://github.com/benhoyt/inih
#include <algorithm>
#include <cctype>
#include <cstdlib>
#include <cstring>
#include <istream>
#include "ini.h"
#include "inireader.h"
using std::string;
INIReader::INIReader(const string& filename)
{
_error = ini_parse(filename.c_str(), ValueHandler, this);
}
INIReader::INIReader(std::istream& filestream)
{
_error = ini_parse_stream([](char* str, int num, void* stream) {
std::istream* is = reinterpret_cast<std::istream*>(stream);
if (num > 0) {
// via https://stackoverflow.com/questions/6089231/
std::string out;
std::istream::sentry se(*is, true);
std::streambuf* sb = is->rdbuf();
bool loop = true;
do {
int c = sb->sbumpc();
switch (c) {
case '\n':
loop = false;
break;
case '\r':
if (sb->sgetc() == '\n') {
sb->sbumpc();
}
loop = false;
break;
case EOF:
// Also handle the case when the last line has no line ending
if (out.empty()) {
is->setstate(std::ios::eofbit);
}
loop = false;
break;
default:
out += (char)c;
}
} while (loop);
if (out.empty() && (is->fail() || is->eof())) {
return (char*)NULL;
}
int to_copy = num - 1;
if (out.size() < (size_t)num) {
to_copy = (int)out.size();
}
memcpy(str, out.data(), to_copy);
str[to_copy + 1] = '\0';
return str;
}
return (char*)NULL;
}, &filestream, ValueHandler, this);
}
int INIReader::ParseError() const
{
return _error;
}
string INIReader::Get(const string& section, const string& name, const string& default_value) const
{
string key = MakeKey(section, name);
// Use _values.find() here instead of _values.at() to support pre C++11 compilers
return _values.count(key) ? _values.find(key)->second : default_value;
}
long INIReader::GetInteger(const string& section, const string& name, long default_value) const
{
string valstr = Get(section, name, "");
const char* value = valstr.c_str();
char* end;
// This parses "1234" (decimal) and also "0x4D2" (hex)
long n = strtol(value, &end, 0);
return end > value ? n : default_value;
}
double INIReader::GetReal(const string& section, const string& name, double default_value) const
{
string valstr = Get(section, name, "");
const char* value = valstr.c_str();
char* end;
double n = strtod(value, &end);
return end > value ? n : default_value;
}
bool INIReader::GetBoolean(const string& section, const string& name, bool default_value) const
{
string valstr = Get(section, name, "");
// Convert to lower case to make string comparisons case-insensitive
std::transform(valstr.begin(), valstr.end(), valstr.begin(), ::tolower);
if (valstr == "true" || valstr == "yes" || valstr == "on" || valstr == "1")
return true;
else if (valstr == "false" || valstr == "no" || valstr == "off" || valstr == "0")
return false;
else
return default_value;
}
string INIReader::MakeKey(const string& section, const string& name)
{
string key = section + "=" + name;
// Convert to lower case to make section/name lookups case-insensitive
std::transform(key.begin(), key.end(), key.begin(), ::tolower);
return key;
}
int INIReader::ValueHandler(void* user, const char* section, const char* name,
const char* value)
{
INIReader* reader = (INIReader*)user;
string key = MakeKey(section, name);
if (reader->_values[key].size() > 0)
reader->_values[key] += "\n";
reader->_values[key] += value;
return 1;
}