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Avro >> mail # user >> C impl, getting a schema back as json C string

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Re: C impl, getting a schema back as json C string

If you look in avro.h, you'll see the following function...

int avro_schema_to_json(avro_schema_t schema, avro_writer_t out);

.... which write a schema to an avro_writer_t.  This allows you to write the
schema to memory or a file... create the writer using...

avro_writer_t avro_writer_file(FILE * fp);
avro_writer_t avro_writer_memory(const char *buf, int64_t len);

I just realized that

int64_t avro_writer_tell(avro_writer_t writer)

is not in avro.h and it should be.  It will tell you the size of the data
written to the writer.

Hope this help.  Keep the questions coming.


On Sun, Mar 14, 2010 at 10:14 PM, Jeff Hodges <[EMAIL PROTECTED]> wrote:
> (Note, that I've passed this in memory avro_writer_t to
> avro_schema_to_json and I'm just trying to get the string inside of it
> out.)
> --
> Jeff
> On Sun, Mar 14, 2010 at 12:39 AM, Jeff Hodges <[EMAIL PROTECTED]> wrote:
>> I can't figure out the API for turning an avro_schema_t back into an
>> in-memory string of json data.
>> It seems I'm supposed to get it out of an avro_writer_t that I've
>> created with avro_writer_memory() but I'm a little lost once we start
>> having to use avro_writer_to_memory() to get back the original
>> avro_memory_writer_t.
>> Sample code?
>> --
>> Jeff