[Tarantool-patches] [PATCH v5 4/8] box, datetime: messagepack support for datetime

[Safin Timur]

On 16.08.2021 2:59, Timur Safin wrote:
> Serialize datetime_t as newly introduced MP_EXT type.
> It saves 1 required integer field and upto 2 optional
> unsigned fields in very compact fashion.
> - secs is required field;
> - but nsec, offset are both optional;
> 
> * json, yaml serialization formats, lua output mode
>    supported;
> * exported symbols for datetime messagepack size calculations
>    so they are available for usage on Lua side.
> 
> Part of #5941
> Part of #5946
...

> diff --git a/src/lib/core/mp_datetime.c b/src/lib/core/mp_datetime.c
> new file mode 100644
> index 000000000..d0a3e562c
> --- /dev/null
> +++ b/src/lib/core/mp_datetime.c
...

> +
> +int
> +mp_snprint_datetime(char *buf, int size, const char **data, uint32_t len)
> +{
> +	struct datetime date = {0};

Due to old gcc compiler used by CentOS7 I had to modify these 2 
functions - see incremental patch below...
> +
> +	if (datetime_unpack(data, len, &date) == NULL)
> +		return -1;
> +
> +	return datetime_to_string(&date, buf, size);
> +}
> +
> +int
> +mp_fprint_datetime(FILE *file, const char **data, uint32_t len)
> +{
> +	struct datetime date;
> +
> +	if (datetime_unpack(data, len, &date) == NULL)
> +		return -1;
> +
> +	char buf[48];
> +	datetime_to_string(&date, buf, sizeof buf);
> +
> +	return fprintf(file, "%s", buf);
> +}
> +

----------------------------------------------------------------
03:15 $ git diff
diff --git a/src/lib/core/mp_datetime.c b/src/lib/core/mp_datetime.c
index d0a3e562c..7e475d5f1 100644
--- a/src/lib/core/mp_datetime.c
+++ b/src/lib/core/mp_datetime.c
@@ -165,7 +165,7 @@ mp_encode_datetime(char *data, const struct datetime 
*date)
  int
  mp_snprint_datetime(char *buf, int size, const char **data, uint32_t len)
  {
-       struct datetime date = {0};
+       struct datetime date = {0, 0, 0};

         if (datetime_unpack(data, len, &date) == NULL)
                 return -1;
@@ -176,7 +176,7 @@ mp_snprint_datetime(char *buf, int size, const char 
**data, uint32_t len)
  int
  mp_fprint_datetime(FILE *file, const char **data, uint32_t len)
  {
-       struct datetime date;
+       struct datetime date = {0, 0, 0};

         if (datetime_unpack(data, len, &date) == NULL)
                 return -1;
----------------------------------------------------------------

Sorry for the inconvenience!

[Applied and force pushed]

Timur