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externals/inih/inih/cpp/INIReader.cpp

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+// Read an INI file into easy-to-access name/value pairs.
+
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Copyright (C) 2009-2020, Ben Hoyt
+
+// inih and INIReader are released under the New BSD license (see LICENSE.txt).
+// Go to the project home page for more info:
+//
+// https://github.com/benhoyt/inih
+
+#include <algorithm>
+#include <cctype>
+#include <cstdlib>
+#include "../ini.h"
+#include "INIReader.h"
+
+using std::string;
+
+INIReader::INIReader(const string& filename)
+{
+    _error = ini_parse(filename.c_str(), ValueHandler, this);
+}
+
+INIReader::INIReader(const char *buffer, size_t buffer_size)
+{
+  string content(buffer, buffer_size);
+  _error = ini_parse_string(content.c_str(), 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;
+}
+
+string INIReader::GetString(const string& section, const string& name, const string& default_value) const
+{
+    const string str = Get(section, name, "");
+    return str.empty() ? default_value : str;
+}
+
+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;
+}
+
+bool INIReader::HasSection(const string& section) const
+{
+    const string key = MakeKey(section, "");
+    std::map<string, string>::const_iterator pos = _values.lower_bound(key);
+    if (pos == _values.end())
+        return false;
+    // Does the key at the lower_bound pos start with "section"?
+    return pos->first.compare(0, key.length(), key) == 0;
+}
+
+bool INIReader::HasValue(const string& section, const string& name) const
+{
+    string key = MakeKey(section, name);
+    return _values.count(key);
+}
+
+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)
+{
+    if (!name)  // Happens when INI_CALL_HANDLER_ON_NEW_SECTION enabled
+        return 1;
+    INIReader* reader = static_cast<INIReader*>(user);
+    string key = MakeKey(section, name);
+    if (reader->_values[key].size() > 0)
+        reader->_values[key] += "\n";
+    reader->_values[key] += value ? value : "";
+    return 1;
+}

externals/inih/inih/cpp/INIReader.h

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+// Read an INI file into easy-to-access name/value pairs.
+
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Copyright (C) 2009-2020, Ben Hoyt
+
+// inih and INIReader are released under the New BSD license (see LICENSE.txt).
+// Go to the project home page for more info:
+//
+// https://github.com/benhoyt/inih
+
+#ifndef INIREADER_H
+#define INIREADER_H
+
+#include <map>
+#include <string>
+
+// Read an INI file into easy-to-access name/value pairs. (Note that I've gone
+// for simplicity here rather than speed, but it should be pretty decent.)
+class INIReader
+{
+public:
+    // Construct INIReader and parse given filename. See ini.h for more info
+    // about the parsing.
+    explicit INIReader(const std::string& filename);
+
+    // Construct INIReader and parse given buffer. See ini.h for more info
+    // about the parsing.
+    explicit INIReader(const char *buffer, size_t buffer_size);
+
+    // Return the result of ini_parse(), i.e., 0 on success, line number of
+    // first error on parse error, or -1 on file open error.
+    int ParseError() const;
+
+    // Get a string value from INI file, returning default_value if not found.
+    std::string Get(const std::string& section, const std::string& name,
+                    const std::string& default_value) const;
+
+    // Get a string value from INI file, returning default_value if not found,
+    // empty, or contains only whitespace.
+    std::string GetString(const std::string& section, const std::string& name,
+                    const std::string& default_value) const;
+
+    // Get an integer (long) value from INI file, returning default_value if
+    // not found or not a valid integer (decimal "1234", "-1234", or hex "0x4d2").
+    long GetInteger(const std::string& section, const std::string& name, long default_value) const;
+
+    // Get a real (floating point double) value from INI file, returning
+    // default_value if not found or not a valid floating point value
+    // according to strtod().
+    double GetReal(const std::string& section, const std::string& name, double default_value) const;
+
+    // Get a boolean value from INI file, returning default_value if not found or if
+    // not a valid true/false value. Valid true values are "true", "yes", "on", "1",
+    // and valid false values are "false", "no", "off", "0" (not case sensitive).
+    bool GetBoolean(const std::string& section, const std::string& name, bool default_value) const;
+
+    // Return true if the given section exists (section must contain at least
+    // one name=value pair).
+    bool HasSection(const std::string& section) const;
+
+    // Return true if a value exists with the given section and field names.
+    bool HasValue(const std::string& section, const std::string& name) const;
+
+private:
+    int _error;
+    std::map<std::string, std::string> _values;
+    static std::string MakeKey(const std::string& section, const std::string& name);
+    static int ValueHandler(void* user, const char* section, const char* name,
+                            const char* value);
+};
+
+#endif  // INIREADER_H