// ===========================================================================

// LICENSE.txt:

/*

The "inih" library is distributed 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.

*/

// ===========================================================================

// Read an INI file into easy-to-access name/value pairs.

// 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
/* inih -- simple .INI file parser

inih is released under the New BSD license (see LICENSE.txt). Go to the project
home page for more info:

https://github.com/benhoyt/inih

*/

#ifndef __INI_H__
#define __INI_H__

#include <locale.h>

/* Make this header file easier to include in C++ code */
#ifdef __cplusplus
extern "C" {
#endif

#include <stdio.h>

    /* Typedef for prototype of handler function. */
    typedef int (*ini_handler)(void* user, const char* section,
        const char* name, const char* value);

    /* Typedef for prototype of fgets-style reader function. */
    typedef char* (*ini_reader)(char* str, int num, void* stream);

    /* Parse given INI-style file. May have [section]s, name=value pairs
       (whitespace stripped), and comments starting with ';' (semicolon). Section
       is "" if name=value pair parsed before any section heading. name:value
       pairs are also supported as a concession to Python's configparser.

       For each name=value pair parsed, call handler function with given user
       pointer as well as section, name, and value (data only valid for duration
       of handler call). Handler should return nonzero on success, zero on error.

       Returns 0 on success, line number of first error on parse error (doesn't
       stop on first error), -1 on file open error, or -2 on memory allocation
       error (only when INI_USE_STACK is zero).
    */
    int ini_parse(const char* filename, ini_handler handler, void* user);

    /* Same as ini_parse(), but takes a FILE* instead of filename. This doesn't
       close the file when it's finished -- the caller must do that. */
    int ini_parse_file(FILE* file, ini_handler handler, void* user);

    /* Same as ini_parse(), but takes an ini_reader function pointer instead of
       filename. Used for implementing custom or string-based I/O. */
    int ini_parse_stream(ini_reader reader, void* stream, ini_handler handler,
        void* user);

    /* Nonzero to allow multi-line value parsing, in the style of Python's
       configparser. If allowed, ini_parse() will call the handler with the same
       name for each subsequent line parsed. */
#ifndef INI_ALLOW_MULTILINE
#define INI_ALLOW_MULTILINE 1
#endif

       /* Nonzero to allow a UTF-8 BOM sequence (0xEF 0xBB 0xBF) at the start of
          the file. See http://code.google.com/p/inih/issues/detail?id=21 */
#ifndef INI_ALLOW_BOM
#define INI_ALLOW_BOM 1
#endif

          /* Nonzero to allow inline comments (with valid inline comment characters
             specified by INI_INLINE_COMMENT_PREFIXES). Set to 0 to turn off and match
             Python 3.2+ configparser behaviour. */
#ifndef INI_ALLOW_INLINE_COMMENTS
#define INI_ALLOW_INLINE_COMMENTS 1
#endif
#ifndef INI_INLINE_COMMENT_PREFIXES
#define INI_INLINE_COMMENT_PREFIXES ";"
#endif

             /* Nonzero to use stack, zero to use heap (malloc/free). */
#ifndef INI_USE_STACK
#define INI_USE_STACK 1
#endif

/* Stop parsing on first error (default is to keep parsing). */
#ifndef INI_STOP_ON_FIRST_ERROR
#define INI_STOP_ON_FIRST_ERROR 0
#endif

/* Maximum line length for any line in INI file. */
#ifndef INI_MAX_LINE
#define INI_MAX_LINE 200
#endif

#ifdef __cplusplus
}
#endif

/* inih -- simple .INI file parser

inih is released under the New BSD license (see LICENSE.txt). Go to the project
home page for more info:

https://github.com/benhoyt/inih

*/

#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
#define _CRT_SECURE_NO_WARNINGS
#endif

#include <stdio.h>
#include <ctype.h>
#include <string.h>

#if !INI_USE_STACK
#include <stdlib.h>
#endif

#define MAX_SECTION 50
#define MAX_NAME 50

/* Strip whitespace chars off end of given string, in place. Return s. */
inline static char* rstrip(char* s)
{
    char* p = s + strlen(s);
    while (p > s && isspace((unsigned char)(*--p)))
        *p = '\0';
    return s;
}

/* Return pointer to first non-whitespace char in given string. */
inline static char* lskip(const char* s)
{
    while (*s && isspace((unsigned char)(*s)))
        s++;
    return (char*)s;
}

/* Return pointer to first char (of chars) or inline comment in given string,
   or pointer to null at end of string if neither found. Inline comment must
   be prefixed by a whitespace character to register as a comment. */
inline static char* find_chars_or_comment(const char* s, const char* chars)
{
#if INI_ALLOW_INLINE_COMMENTS
    int was_space = 0;
    while (*s && (!chars || !strchr(chars, *s)) &&
        !(was_space && strchr(INI_INLINE_COMMENT_PREFIXES, *s))) {
        was_space = isspace((unsigned char)(*s));
        s++;
    }
#else
    while (*s && (!chars || !strchr(chars, *s))) {
        s++;
    }
#endif
    return (char*)s;
}

/* Version of strncpy that ensures dest (size bytes) is null-terminated. */
inline static char* strncpy0(char* dest, const char* src, size_t size)
{
    strncpy(dest, src, size);
    dest[size - 1] = '\0';
    return dest;
}

/* See documentation in header file. */
inline int ini_parse_stream(ini_reader reader, void* stream, ini_handler handler,
    void* user)
{
    /* Uses a fair bit of stack (use heap instead if you need to) */
#if INI_USE_STACK
    char line[INI_MAX_LINE];
#else
    char* line;
#endif
    char section[MAX_SECTION] = "";
    char prev_name[MAX_NAME] = "";

    char* start;
    char* end;
    char* name;
    char* value;
    int lineno = 0;
    int error = 0;

#if !INI_USE_STACK
    line = (char*)malloc(INI_MAX_LINE);
    if (!line) {
        return -2;
    }
#endif

    /* Scan through stream line by line */
    while (reader(line, INI_MAX_LINE, stream) != NULL) {
        lineno++;

        start = line;
#if INI_ALLOW_BOM
        if (lineno == 1 && (unsigned char)start[0] == 0xEF &&
            (unsigned char)start[1] == 0xBB &&
            (unsigned char)start[2] == 0xBF) {
            start += 3;
        }
#endif
        start = lskip(rstrip(start));

        if (*start == ';' || *start == '#') {
            /* Per Python configparser, allow both ; and # comments at the
               start of a line */
        }
#if INI_ALLOW_MULTILINE
        else if (*prev_name && *start && start > line) {

#if INI_ALLOW_INLINE_COMMENTS
            end = find_chars_or_comment(start, NULL);
            if (*end)
                *end = '\0';
            rstrip(start);
#endif

            /* Non-blank line with leading whitespace, treat as continuation
               of previous name's value (as per Python configparser). */
            if (!handler(user, section, prev_name, start) && !error)
                error = lineno;
        }
#endif
        else if (*start == '[') {
            /* A "[section]" line */
            end = find_chars_or_comment(start + 1, "]");
            if (*end == ']') {
                *end = '\0';
                strncpy0(section, start + 1, sizeof(section));
                *prev_name = '\0';
            }
            else if (!error) {
                /* No ']' found on section line */
                error = lineno;
            }
        }
        else if (*start) {
            /* Not a comment, must be a name[=:]value pair */
            end = find_chars_or_comment(start, "=:");
            if (*end == '=' || *end == ':') {
                *end = '\0';
                name = rstrip(start);
                value = lskip(end + 1);
#if INI_ALLOW_INLINE_COMMENTS
                end = find_chars_or_comment(value, NULL);
                if (*end)
                    *end = '\0';
#endif
                rstrip(value);

                /* Valid name[=:]value pair found, call handler */
                strncpy0(prev_name, name, sizeof(prev_name));
                if (!handler(user, section, name, value) && !error)
                    error = lineno;
            }
            else if (!error) {
                /* No '=' or ':' found on name[=:]value line */
                error = lineno;
            }
        }

#if INI_STOP_ON_FIRST_ERROR
        if (error)
            break;
#endif
    }

#if !INI_USE_STACK
    free(line);
#endif

    return error;
}

/* See documentation in header file. */
inline int ini_parse_file(FILE* file, ini_handler handler, void* user)
{
    return ini_parse_stream((ini_reader)fgets, file, handler, user);
}

/* See documentation in header file. */
inline int ini_parse(const char* filename, ini_handler handler, void* user)
{
    FILE* file;
    int error;

    file = fopen(filename, "r");
    if (!file)
        return -1;
    error = ini_parse_file(file, handler, user);
    fclose(file);
    return error;
}

#endif /* __INI_H__ */


#ifndef __INIREADER_H__
#define __INIREADER_H__

#include <map>
#include <set>
#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.
    INIReader(std::string filename);

    // Construct INIReader and parse given file. See ini.h for more info
    // about the parsing.
    INIReader(FILE* file);

    ~INIReader();

    // 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;

    // Return the list of sections found in ini file
    const std::set<std::string>& Sections() const;

    // Get a string value from INI file, returning default_value if not found.
    std::string Get(std::string section, std::string name,
        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(std::string section, 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(std::string section, std::string name, double default_value) const;

    // Get a single precision floating point number value from INI file, returning
    // default_value if not found or not a valid floating point value
    // according to strtof().
    float GetFloat(std::string section, std::string name, float 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(std::string section, std::string name, bool default_value) const;

    void Clear() {
        _error = 0;
        _values.clear();
        _sections.clear();
    }

protected:
    int _error;
    std::map<std::string, std::string> _values;
    std::set<std::string> _sections;
    _locale_t Locale;
    static std::string MakeKey(std::string section, std::string name);
    static int ValueHandler(void* user, const char* section, const char* name,
        const char* value);
};

#endif  // __INIREADER_H__


#ifndef __INIREADER__
#define __INIREADER__

#include <algorithm>
#include <cctype>
#include <cstdlib>

inline INIReader::INIReader(std::string filename)
{
    _error = ini_parse(filename.c_str(), ValueHandler, this);
    Locale = _create_locale(LC_ALL, "C");
}

inline INIReader::INIReader(FILE* file)
{
    _error = ini_parse_file(file, ValueHandler, this);
    Locale = _create_locale(LC_ALL, "C");
}

inline INIReader::~INIReader()
{
    _free_locale(Locale);
}

inline int INIReader::ParseError() const
{
    return _error;
}

inline const std::set<std::string>& INIReader::Sections() const
{
    return _sections;
}

inline std::string INIReader::Get(std::string section, std::string name, std::string default_value) const
{
    std::string key = MakeKey(section, name);
    return _values.count(key) ? _values.at(key) : default_value;
}

inline long INIReader::GetInteger(std::string section, std::string name, long default_value) const
{
    std::string valstr = Get(section, name, "");
    const char* value = valstr.c_str();
    char* end;
    // This parses "1234" (decimal) and also "0x4D2" (hex)
    long n = _strtol_l(value, &end, 0, Locale);
    return end > value ? n : default_value;
}

inline double INIReader::GetReal(std::string section, std::string name, double default_value) const
{
    std::string valstr = Get(section, name, "");
    const char* value = valstr.c_str();
    char* end;
    double n = _strtod_l(value, &end, Locale);
    return end > value ? n : default_value;
}

inline float INIReader::GetFloat(std::string section, std::string name, float default_value) const
{
    std::string valstr = Get(section, name, "");
    const char* value = valstr.c_str();
    char* end;
    float n = _strtof_l(value, &end, Locale);
    return end > value ? n : default_value;
}

inline bool INIReader::GetBoolean(std::string section, std::string name, bool default_value) const
{
    std::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;
}

inline std::string INIReader::MakeKey(std::string section, std::string name)
{
    std::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;
}

inline int INIReader::ValueHandler(void* user, const char* section, const char* name,
    const char* value)
{
    INIReader* reader = (INIReader*)user;
    std::string key = MakeKey(section, name);
    if (reader->_values[key].size() > 0)
        reader->_values[key] += "\n";
    reader->_values[key] += value;
    reader->_sections.insert(section);
    return 1;
}

#endif  // __INIREADER__
