[Tarantool-patches] [PATCH resend v2 07/11] lua, datetime: proper datetime encoding

[Oleg Babin]

Thanks for your patch. This change should be squashed into the patch 
where encoding was introduced.

On 28.07.2021 13:34, Timur Safin via Tarantool-patches wrote:
> * correct incorrect encoding of MP_EXT sizes for datetime
>    messagepack values;
> * export necessary symbols for datetime messagepack size calculations
>    so they will be available for Lua consumption.
>
> Part of #5941
> ---
>   src/exports.h           |  2 ++
>   src/lib/core/datetime.c | 15 ++++++++++-----
>   src/lua/msgpackffi.lua  | 10 ++++++++++
>   3 files changed, 22 insertions(+), 5 deletions(-)
>
> diff --git a/src/exports.h b/src/exports.h
> index 586444b65..3a1e8854c 100644
> --- a/src/exports.h
> +++ b/src/exports.h
> @@ -437,6 +437,7 @@ EXPORT(mp_encode_decimal)
>   EXPORT(mp_encode_double)
>   EXPORT(mp_encode_float)
>   EXPORT(mp_encode_uuid)
> +EXPORT(mp_encode_datetime)
>   EXPORT(mp_ext_hint)
>   EXPORT(mp_format)
>   EXPORT(mp_fprint)
> @@ -446,6 +447,7 @@ EXPORT(mp_fprint_recursion)
>   EXPORT(mp_parser_hint)
>   EXPORT(mp_sizeof_decimal)
>   EXPORT(mp_sizeof_uuid)
> +EXPORT(mp_sizeof_datetime)
>   EXPORT(mp_snprint)
>   EXPORT(mp_snprint_ext)
>   EXPORT(mp_snprint_ext_default)
> diff --git a/src/lib/core/datetime.c b/src/lib/core/datetime.c
> index 26ba8a702..76b06eae5 100755
> --- a/src/lib/core/datetime.c
> +++ b/src/lib/core/datetime.c
> @@ -83,8 +83,8 @@ mp_decode_Xint(const char **data)
>   	return 0;
>   }
>   
> -uint32_t
> -mp_sizeof_datetime(const struct datetime_t *date)
> +static inline uint32_t
> +mp_sizeof_datetime_raw(const struct datetime_t *date)
>   {
>   	uint32_t sz = mp_sizeof_Xint(date->secs);
>   
> @@ -94,10 +94,15 @@ mp_sizeof_datetime(const struct datetime_t *date)
>   		sz += mp_sizeof_Xint(date->nsec);
>   	if (date->offset)
>   		sz += mp_sizeof_Xint(date->offset);
> -
>   	return sz;
>   }
>   
> +uint32_t
> +mp_sizeof_datetime(const struct datetime_t *date)
> +{
> +	return mp_sizeof_ext(mp_sizeof_datetime_raw(date));
> +}
> +
>   struct datetime_t *
>   datetime_unpack(const char **data, uint32_t len, struct datetime_t *date)
>   {
> @@ -112,7 +117,7 @@ datetime_unpack(const char **data, uint32_t len, struct datetime_t *date)
>   		return date;
>   
>   	svp = *data;
> -	date->secs = mp_decode_Xint(data);
> +	date->nsec = mp_decode_Xint(data);
>   	len -= *data - svp;
>   
>   	if (len <= 0)
> @@ -153,7 +158,7 @@ datetime_pack(char *data, const struct datetime_t *date)
>   char *
>   mp_encode_datetime(char *data, const struct datetime_t *date)
>   {
> -	uint32_t len = mp_sizeof_datetime(date);
> +	uint32_t len = mp_sizeof_datetime_raw(date);
>   
>   	data = mp_encode_extl(data, MP_DATETIME, len);
>   
> diff --git a/src/lua/msgpackffi.lua b/src/lua/msgpackffi.lua
> index 271be857a..c47d77acb 100644
> --- a/src/lua/msgpackffi.lua
> +++ b/src/lua/msgpackffi.lua
> @@ -26,6 +26,10 @@ char *
>   mp_encode_uuid(char *data, const struct tt_uuid *uuid);
>   uint32_t
>   mp_sizeof_uuid();
> +uint32_t
> +mp_sizeof_datetime(const struct t_datetime_tz *date);
> +char *
> +mp_encode_datetime(char *data, const struct t_datetime_tz *date);
>   float
>   mp_decode_float(const char **data);
>   double
> @@ -144,6 +148,11 @@ local function encode_uuid(buf, uuid)
>       builtin.mp_encode_uuid(p, uuid)
>   end
>   
> +local function encode_datetime(buf, date)
> +    local p = buf:alloc(builtin.mp_sizeof_datetime(date))
> +    builtin.mp_encode_datetime(p, date)
> +end
> +
>   local function encode_int(buf, num)
>       if num >= 0 then
>           if num <= 0x7f then
> @@ -322,6 +331,7 @@ on_encode(ffi.typeof('float'), encode_float)
>   on_encode(ffi.typeof('double'), encode_double)
>   on_encode(ffi.typeof('decimal_t'), encode_decimal)
>   on_encode(ffi.typeof('struct tt_uuid'), encode_uuid)
> +on_encode(ffi.typeof('struct datetime_t'), encode_datetime)
>   
>   --------------------------------------------------------------------------------
>   -- Decoder