Re: [RFC PATCH 1/1] json-writer: incorrect format specifier

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Ramsay Jones <ramsay@xxxxxxxxxxxxxxxxxxxx> writes:

>>> @@ -120,7 +120,7 @@ void jw_object_uint64(struct json_writer *jw, const char *key, uint64_t value)
>>>  	maybe_add_comma(jw);
>>>  
>>>  	append_quoted_string(&jw->json, key);
>>> -	strbuf_addf(&jw->json, ":%"PRIuMAX, value);
>>> +	strbuf_addf(&jw->json, ":%"PRIu64, value);
>> 
>> In this code-base, that would normally be written as:
>> 
>> 	strbuf_addf(&jw->json, ":%"PRIuMAX, (uintmax_t) value);
>
> heh, I should learn not to reply in a hurry, just before
> going out ...
>
> I had not noticed that 'value' was declared with an 'sized type'
> of uint64_t, so using PRIu64 should be fine.

But why is this codepath using a sized type in the first place?  It
is not like it wants to read/write a fixed binary file format---it
just wants to use an integer type that is wide enough to handle any
inttype the platform uses, for which uintmax_t would be a more
appropriate type, no?



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