printing a string

printing a string

[ranjith kumar]

I know that a variable can be print in gdb by
"print var".

But how to print a string???

Thanks in advance.


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RE: printing a string

[Dave Korn]

On 08 January 2008 06:06, ranjith kumar wrote:

> I know that a variable can be print in gdb by
> "print var".
> 
> But how to print a string???

  "print" will display a string, if you're printing a variable of type "char
*", or a std::string.

  Or you can use "x" (examine) with the "/s" modifier if you just have a
memory address.

    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....

Re: printing a string

[Andrew STUBBS]

Dave Korn wrote:
> On 08 January 2008 06:06, ranjith kumar wrote:
> 
>> I know that a variable can be print in gdb by
>> "print var".
>>
>> But how to print a string???
> 
>   "print" will display a string, if you're printing a variable of type "char
> *", or a std::string.
> 
>   Or you can use "x" (examine) with the "/s" modifier if you just have a
> memory address.

Or, if your string is to long, or x/s is too ugly:

   printf "%s\n", mystring

Andrew

Re: printing a string

[Jim Blandy]

Andrew STUBBS <andrew.stubbs at st.com> writes:
> Dave Korn wrote:
>> On 08 January 2008 06:06, ranjith kumar wrote:
>>
>>> I know that a variable can be print in gdb by
>>> "print var".
>>>
>>> But how to print a string???
>>
>>   "print" will display a string, if you're printing a variable of type "char
>> *", or a std::string.
>>
>>   Or you can use "x" (examine) with the "/s" modifier if you just have a
>> memory address.
>
> Or, if your string is to long, or x/s is too ugly:
>
>   printf "%s\n", mystring

(Not 'set print elements'?)

Re: printing a string

[Andrew STUBBS]

Jim Blandy wrote:
> Andrew STUBBS <andrew.stubbs at st.com> writes:
>>   printf "%s\n", mystring
> 
> (Not 'set print elements'?)

Well, 'set print elements 0' and 'set print repeats 0' gets you some of 
the way there, but line-feeds still get converted to '\n', and if you 
want to print shorter strings with x/s then you'll also need 'set print 
null-stop on' .....

Basically, if you want to see a string as nature intended then printf 
seems to be the easiest way, plus x/s remains useful for viewing the 
contents of the string a different way.

Andrew