Re: question on some code.

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От
Korry
Тема
Re: question on some code.
Дата
Msg-id
1121795665.4163.27.camel@sakai
Ответ на
question on some code. (Chris Bowlby)
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question on some code. Chris Bowlby <excalibur@accesswave.ca>
Re: question on some code. Korry <korry@starband.net>
Re: question on some code. Chris Bowlby <excalibur@accesswave.ca>
Re: question on some code. Tom Lane <tgl@sss.pgh.pa.us>
Re: question on some code. Chris Bowlby <excalibur@accesswave.ca>
If I understand the code right, your trying to pass in to 
appendBinaryStringInfo an "address" or reference to the n8, n16, or n32 
variables and cast them so that a char * pointer can access that address 
space. Through some testing that I've been doing (outputting the values in 
the appendBinaryStringInfo function), I never seem to see any data, The 
variable pointer that references the "n8, n16, or n32" value is not holding 
any data in the appendBinaryStringInfo function.

How are you looking at the data?  If you're treating the pointer as if it were a null-terminated string, it's likely that the first byte is a null character much of the time.  Since this is binary data (not character data), you'll need to look at the individual bytes.  If you're using gdb, use 'x' command instead of the 'p' command.  If you've thrown a printf() into the code, you can't use a "%s" format specifier, you'll have to look at the bytes one at a time using something like "%02X".


        -- Korry
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