[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH v3 2/5] QJSON: Add JSON writer
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] [PATCH v3 2/5] QJSON: Add JSON writer |
Date: |
Tue, 06 Jan 2015 22:16:39 +0100 |
User-agent: |
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.3.0 |
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
On 06.01.15 16:44, Eric Blake wrote:
> On 12/26/2014 07:42 AM, Alexander Graf wrote:
>> To support programmatic JSON assembly while keeping the code that
>> generates it readable, this patch introduces a simple JSON
>> writer. It emits JSON serially into a buffer in memory.
>>
>> The nice thing about this writer is its simplicity and low memory
>> overhead. Unlike the QMP JSON writer, this one does not need to
>> spawn QObjects for every element it wants to represent.
>>
>> This is a prerequisite for the migration stream format
>> description generator.
>>
>> Signed-off-by: Alexander Graf <address@hidden>
>>
>> ---
>>
>> v2 -> v3:
>>
>> - QOMify the QJSON object, makes for easier destruction ---
>> include/qjson.h | 3 ++- qjson.c | 39
>> ++++++++++++++++++++++++++++++++++++--- 2 files changed, 38
>> insertions(+), 4 deletions(-)
>>
>> diff --git a/include/qjson.h b/include/qjson.h index
>> 8f8c145..7c54fdf 100644 --- a/include/qjson.h +++
>> b/include/qjson.h @@ -4,7 +4,7 @@ * Copyright Alexander Graf * *
>> Authors: - * Alexander Graf <address@hidden + * Alexander Graf
>> <address@hidden>
>
> Umm, this should be squashed into 1/5.
Honestly, I think the whole patch should've gotten squashed into 1/5.
I'm not quite sure what went wrong here :).
>
>> @@ -85,9 +88,7 @@ const char *qjson_get_str(QJSON *json)
>>
>> QJSON *qjson_new(void) { - QJSON *json = g_new(QJSON, 1); -
>> json->str = qstring_from_str("{ "); - json->omit_comma =
>> true; + QJSON *json = (QJSON *)object_new(TYPE_QJSON); return
>> json;
>
> This undoes the dangling object that I complained about on patch
> 1; maybe there's some more squashing to do?...
>
>
>> +static void qjson_initfn(Object *obj) +{ + QJSON *json =
>> (QJSON *)object_dynamic_cast(obj, TYPE_QJSON); +
>> assert(json); + + json->str = qstring_from_str("{ "); +
>> json->omit_comma = true;
>
> ...or is it still an incomplete object, just now in a different
> location?
The idea is that you call finish and only then receive the string. I
don't think doing that from get_str would be too much of an
improvement - it'd still be wrong if we're in the middle of assembling
an object.
Alex
-----BEGIN PGP SIGNATURE-----
Version: GnuPG/MacGPG2 v2.0.22 (Darwin)
Comment: GPGTools - http://gpgtools.org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=Zod1
-----END PGP SIGNATURE-----