So, just out of curiosity, how can

sizeof(LOGGER_SERIAL_DEFAULT)

be both 4 (in the QuckWatch) and 5 in the compiled code (red line in disassembly) ?
It's defined as:

#define LOGGER_SERIAL_DEFAULT "----"

So in my mind it should be 4 (if the compiler wanted to count the quotes it would be 6) but NEVER 5.

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Strings include a NUL character as the string terminator. So that would be 4+1

----- Original Message -----
From: j...@massmind.org [msp430]
To: m...
Sent: Monday, July 14, 2014 16:38
Subject: [msp430] Defined string with 4 characters is sizeof 4 in watch and 5 in compiled code.

So, just out of curiosity, how can

sizeof(LOGGER_SERIAL_DEFAULT)

be both 4 (in the QuckWatch) and 5 in the compiled code (red line in disassembly) ?

It's defined as:

#define LOGGER_SERIAL_DEFAULT "----"

So in my mind it should be 4 (if the compiler wanted to count the quotes it would be 6) but NEVER 5.

http://e2e.ti.com/cfs-file.ashx/__key/communityserver-discussions-components-files/166/0552.delme.png

http://e2e.ti.com/cfs-file.ashx/__key/communityserv...
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Not unless you put a \0 on it. And even if that is so, why does the debugger say it's 4 long? Start a New Thread

Possibly 4 chars and a terminating null, '\0' ?
PL

On 15/07/2014 9:38 AM, j...@massmind.org [msp430] wrote:
> So, just out of curiosity, how can
> sizeof(LOGGER_SERIAL_DEFAULT)
> be both 4 (in the QuckWatch) and 5 in the compiled code (red line in
> disassembly) ?
>
> It's defined as:
> #define LOGGER_SERIAL_DEFAULT "----"
> So in my mind it should be 4 (if the compiler wanted to count the quotes
> it would be 6) but NEVER 5.
> http://e2e.ti.com/cfs-file.ashx/__key/communityserver-discussions-components-files/166/0552.delme.png
>
>
> image
>
>
> http://e2e.ti.com/cfs-file.ashx/__key/communityserv...
>
> View on e2e.ti.com
>
> Preview by Yahoo

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Posted by: Peter Lissenburg




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Ok, so 4 chars and a null, but then why does the debugger in the quick watch window, report that it is 4? Start a New Thread

Maybe the quick watch uses strlen() which would return 4.

From: mailto:m...
Sent: Monday, July 14, 2014 5:39 PM
To: m...
Subject: [msp430] Re: Defined string with 4 characters is sizeof 4 in watch and 5 in compiled code.

Ok, so 4 chars and a null, but then why does the debugger in the quick watch window, report that it is 4? Start a New Thread

If IAR assumes 32-bit data pointers, watch may be showing the size of the
address of the string.
Does watch sizeof("longer string") show 4, 13, or 14? Start a New Thread

Thinking back years: The compiler inserts the null when it recognizes the
quotation marks are used. The preprocessor is running before that step has
completed.

-Max Murphy

On Tue, Jul 15, 2014 at 1:36 AM, 'Steve Mayfield' S...@att.net
[msp430] wrote:
> Maybe the quick watch uses strlen() which would return 4.
>
> *From:* mailto:m...
> *Sent:* Monday, July 14, 2014 5:39 PM
> *To:* m...
> *Subject:* [msp430] Re: Defined string with 4 characters is sizeof 4 in
> watch and 5 in compiled code.
>
> Ok, so 4 chars and a null, but then why does the debugger in the quick
> watch window, report that it is 4?
>
>
> Start a New Thread