utils.h

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// Copyright © 2008-2021 Pioneer Developers. See AUTHORS.txt for details
// Licensed under the terms of the GPL v3. See licenses/GPL-3.txt
 
#ifndef _UTILS_H
#define _UTILS_H
 
#if defined(_MSC_VER) && !defined(NOMINMAX)
#define NOMINMAX
#endif
 
#include "core/Log.h"
#include "libs.h"
#include <fmt/printf.h>
#include <stdarg.h>
#include <stdio.h>
#include <string>
#include <vector>
 
#ifndef __GNUC__
#define __attribute(x)
#endif /* __GNUC__ */
 
// GCC warns when a function marked __attribute((noreturn)) actually returns a value
// but other compilers which don't see the noreturn attribute of course require that
// a function with a non-void return type should return something.
#ifndef __GNUC__
#define RETURN_ZERO_NONGNU_ONLY return 0;
#else
#define RETURN_ZERO_NONGNU_ONLY
#endif
 
// align x to a. taken from the Linux kernel
#define ALIGN(x, a) __ALIGN_MASK(x, (a - 1))
#define __ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
 
// void Error(const char *format, ...) __attribute((format(printf, 1, 2))) __attribute((noreturn));
// void Warning(const char *format, ...) __attribute((format(printf, 1, 2)));
// void Output(const char *format, ...) __attribute((format(printf, 1, 2)));
 
template <typename... Args>
inline void Output(const char *message, Args... args)
{
    Log::LogOld(Log::Severity::Info, fmt::sprintf(message, args...));
}
 
template <typename... Args>
inline void Warning(const char *message, Args... args)
{
    Log::LogOld(Log::Severity::Warning, fmt::sprintf(message, args...));
}
 
template <typename... Args>
[[noreturn]] inline void Error(const char *message, Args... args)
{
    Log::LogFatalOld(fmt::sprintf(message, args...));
}
 
template <typename... Args>
inline void DebugMsg(const char *message, Args... args)
{
    Log::LogOld(Log::Severity::Debug, fmt::sprintf(message, args...));
}
 
std::string string_join(std::vector<std::string> &v, std::string sep);
std::string format_date(double time);
std::string format_date_only(double time);
std::string format_distance(double dist, int precision = 2);
std::string format_money(double cents, bool showCents = true);
std::string format_duration(double seconds);
 
static inline Sint64 isqrt(Sint64 a)
{
    // replace with cast from sqrt below which is between x7.3 (win32, Debug) & x15 (x64, Release) times faster
    return static_cast<int64_t>(sqrt(static_cast<double>(a)));
}
 
static inline Sint64 isqrt(fixed v)
{
    Sint64 ret = 0;
    Sint64 s;
    Sint64 ret_sq = -v.v - 1;
    for (s = 62; s >= 0; s -= 2) {
        Sint64 b;
        ret += ret;
        b = ret_sq + ((2 * ret + 1) << s);
        if (b < 0) {
            ret_sq = b;
            ret++;
        }
    }
    return ret;
}
 
// find string in bigger string, ignoring case
const char *pi_strcasestr(const char *haystack, const char *needle);
 
inline bool starts_with(const std::string_view s, const std::string_view t)
{
    if (s.size() < t.size())
        return false;
    return memcmp(s.data(), t.data(), t.size()) == 0;
}
 
inline bool ends_with(const std::string_view s, const std::string_view t)
{
    if (s.size() < t.size())
        return false;
 
    return memcmp(s.data() + (s.size() - t.size()), t.data(), t.size()) == 0;
}
 
inline bool starts_with_ci(const std::string_view s, const std::string_view t)
{
    if (s.size() < t.size())
        return false;
 
    for (size_t i = 0; i < t.size(); i++)
        if (tolower(s.data()[i]) != tolower(t.data()[i]))
            return false;
 
    return true;
}
 
inline bool ends_with_ci(const std::string_view s, const std::string_view t)
{
    if (s.size() < t.size())
        return false;
 
    for (int64_t i = t.size(); i > 0; i--)
        if (tolower(s.data()[s.size() - i]) != tolower(t.data()[t.size() - i]))
            return false;
 
    return true;
}
 
static inline size_t SplitSpec(const std::string &spec, std::vector<int> &output)
{
    static const std::string delim(",");
 
    size_t i = 0, start = 0, end = 0;
    while (end != std::string::npos) {
        // get to the first non-delim char
        start = spec.find_first_not_of(delim, end);
 
        // read the end, no more to do
        if (start == std::string::npos)
            break;
 
        // find the end - next delim or end of string
        end = spec.find_first_of(delim, start);
 
        // extract the fragment and remember it
        output[i++] = atoi(spec.substr(start, (end == std::string::npos) ? std::string::npos : end - start).c_str());
    }
 
    return i;
}
 
static inline size_t SplitSpec(const std::string &spec, std::vector<float> &output)
{
    static const std::string delim(",");
 
    size_t i = 0, start = 0, end = 0;
    while (end != std::string::npos) {
        // get to the first non-delim char
        start = spec.find_first_not_of(delim, end);
 
        // read the end, no more to do
        if (start == std::string::npos)
            break;
 
        // find the end - next delim or end of string
        end = spec.find_first_of(delim, start);
 
        // extract the fragment and remember it
        output[i++] = atof(spec.substr(start, (end == std::string::npos) ? std::string::npos : end - start).c_str());
    }
 
    return i;
}
 
std::vector<std::string> SplitString(const std::string &source, const std::string &delim);
 
// 'Numeric type' to string conversions.
std::string FloatToStr(float val);
std::string DoubleToStr(double val);
std::string AutoToStr(Sint32 val);
std::string AutoToStr(Sint64 val);
std::string AutoToStr(float val);
std::string AutoToStr(double val);
 
void Vector3fToStr(const vector3f &val, char *out, size_t size);
void Vector3dToStr(const vector3d &val, char *out, size_t size);
void Matrix3x3fToStr(const matrix3x3f &val, char *out, size_t size);
void Matrix3x3dToStr(const matrix3x3d &val, char *out, size_t size);
void Matrix4x4fToStr(const matrix4x4f &val, char *out, size_t size);
void Matrix4x4dToStr(const matrix4x4d &val, char *out, size_t size);
 
// String to 'Numeric type' conversions.
Sint64 StrToSInt64(const std::string &str);
Uint64 StrToUInt64(const std::string &str);
float StrToFloat(const std::string &str);
double StrToDouble(const std::string &str);
void StrToAuto(Sint32 *pVal, const std::string &str);
void StrToAuto(Sint64 *pVal, const std::string &str);
void StrToAuto(float *pVal, const std::string &str);
void StrToAuto(double *pVal, const std::string &str);
 
void StrToVector3f(const char *str, vector3f &val);
void StrToVector3d(const char *str, vector3d &val);
void StrToMatrix3x3f(const char *str, matrix3x3f &val);
void StrToMatrix3x3d(const char *str, matrix3x3d &val);
void StrToMatrix4x4f(const char *str, matrix4x4f &val);
void StrToMatrix4x4d(const char *str, matrix4x4d &val);
 
// Convert decimal coordinates to degree/minute/second format and return as string
std::string DecimalToDegMinSec(float dec);
 
// add a few things that MSVC is missing
#if defined(_MSC_VER) && (_MSC_VER < 1800)
 
// round & roundf. taken from http://cgit.freedesktop.org/mesa/mesa/tree/src/gallium/auxiliary/util/u_math.h
static inline double round(double x)
{
    return x >= 0.0 ? floor(x + 0.5) : ceil(x - 0.5);
}
 
static inline float roundf(float x)
{
    return x >= 0.0f ? floorf(x + 0.5f) : ceilf(x - 0.5f);
}
#endif /* _MSC_VER < 1800 */
 
static inline Uint32 ceil_pow2(Uint32 v)
{
    v--;
    v |= v >> 1;
    v |= v >> 2;
    v |= v >> 4;
    v |= v >> 8;
    v |= v >> 16;
    v++;
    return v;
}
 
// An adaptor for automagic reverse range-for iteration of containers
// One might be able to specialize this for raw arrays, but that's beyond the
// point of its use-case.
// One might also point out that this is surely more work to code than simply
// writing an explicit iterator loop, to which I say: bah humbug!
template <typename T>
struct reverse_container_t {
    using iterator = typename T::reverse_iterator;
    using const_iterator = typename T::const_reverse_iterator;
 
    using value_type = typename std::remove_reference<T>::type;
 
    reverse_container_t(value_type &ref) :
        ref(ref) {}
 
    iterator begin() { return ref.rbegin(); }
    const_iterator begin() const { return ref.crbegin(); }
 
    iterator end() { return ref.rend(); }
    const_iterator end() const { return ref.crend(); }
 
private:
    value_type &ref;
};
 
// Use this function for automatic template parameter deduction
template <typename T>
reverse_container_t<T> reverse_container(T &ref) { return reverse_container_t<T>(ref); }
 
void hexdump(const unsigned char *buf, int bufsz);
 
#endif /* _UTILS_H */