duckdb::DateToStringCast Struct Reference

Static Public Member Functions
static idx_t	YearLength (int32_t &year, idx_t &year_length, bool &add_bc)
static idx_t	Length (int32_t date[], idx_t &year_length, bool &add_bc)
static void	FormatComponent (char *&ptr, int32_t number)
static void	Format (char *data, int32_t year, int32_t month, int32_t day, idx_t year_length, bool add_bc)
static void	Format (char *data, int32_t date[], idx_t year_length, bool add_bc)

Member Function Documentation

YearLength()

static idx_t duckdb::DateToStringCast::YearLength ( int32_t &  year, idx_t &  year_length, bool &  add_bc  )

inlinestatic

                                                                             {
        // format is YYYY-MM-DD with optional (BC) at the end
        // regular length is 10
        idx_t length = 6;
        year_length = 4;
        add_bc = false;
        if (year <= 0) {
            // add (BC) suffix
            length += 5;
            year = -year + 1;
            add_bc = true;
        }
 
        // potentially add extra characters depending on length of year
        year_length += year >= 10000;
        year_length += year >= 100000;
        year_length += year >= 1000000;
        year_length += year >= 10000000;
        length += year_length;
        return length;
    }

Length()

static idx_t duckdb::DateToStringCast::Length ( int32_t  date[], idx_t &  year_length, bool &  add_bc  )

inlinestatic

                                                                          {
        return YearLength(date[0], year_length, add_bc);
    }

FormatComponent()

static void duckdb::DateToStringCast::FormatComponent ( char *&  ptr, int32_t  number  )

inlinestatic

                                                            {
        ptr[0] = '-';
        if (number < 10) {
            ptr[1] = '0';
            ptr[2] = UnsafeNumericCast<char>('0' + number);
        } else {
            auto index = UnsafeNumericCast<idx_t>(number * 2);
            ptr[1] = duckdb_fmt::internal::data::digits[index];
            ptr[2] = duckdb_fmt::internal::data::digits[index + 1];
        }
        ptr += 3;
    }

Format() [1/2]

static void duckdb::DateToStringCast::Format ( char *  data, int32_t  year, int32_t  month, int32_t  day, idx_t  year_length, bool  add_bc  )

inlinestatic

                                                                                                             {
        // now we write the string, first write the year
        auto endptr = data + year_length;
        endptr = NumericHelper::FormatUnsigned(year, endptr);
        // add optional leading zeros
        while (endptr > data) {
            *--endptr = '0';
        }
        // now write the month and day
        auto ptr = data + year_length;
        FormatComponent(ptr, month);
        FormatComponent(ptr, day);
        // optionally add BC to the end of the date
        if (add_bc) {
            memcpy(ptr, " (BC)", 5); // NOLINT
        }
    }

Format() [2/2]

static void duckdb::DateToStringCast::Format ( char *  data, int32_t  date[], idx_t  year_length, bool  add_bc  )

inlinestatic

                                                                                   {
        Format(data, date[0], date[1], date[2], year_length, add_bc);
    }

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The documentation for this struct was generated from the following file:

• external/duckdb/duckdb.cpp