dev-cpp-users

[Dev-C++] gets,fgets,getline

[<vil...@ya...>]

I have experienced problems with the function "gets".
It seems that in my program is using memory addresses that shouldn't use
because it writes on some of my dynamic memory space.

I have read the "The GNU C Library" and while trying to use "getline" instead
of "gets", it seems that getline is not in "stdio.h". In fact, searching for it
in "stdio.h" like >Ctrl+F-> "getline", it doesn't found it.

I dunno what's happening.

Does anybody know anything I can try?


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Re: [Dev-C++] gets,fgets,getline

[Bolek V. <vr...@pa...>]

> I have experienced problems with the function "gets".
> It seems that in my program is using memory addresses that shouldn't use
> because it writes on some of my dynamic memory space.

gets doesn't test the size of the input buffer. The buffer must be long
enough to hold all input characters.

> I have read the "The GNU C Library" and while trying to use "getline" instead
> of "gets", it seems that getline is not in "stdio.h". In fact, searching for it
> in "stdio.h" like >Ctrl+F-> "getline", it doesn't found it.

According to the standard getline is in <string>. However, this is a C++
only function that reads the string class object from objective streams.
I don't know if there is any getline for char * in the GNU C library -
if so, it might be anywhere.

-- 
============================================================
                           Ing. Boleslav Vrany
                           Stanice techniku DDM hl. m. Prahy
                           Pod Juliskou 2a
                           Praha 6 - Dejvice
                           16000
                           Czech Republic

                           tel. (420 2) 243 10 240

RE: [Dev-C++] gets,fgets,getline

[Ioannis V. <no...@ya...>]

gets() must be provided with a pointer to allocated space either a static
array or a dynamic allocated "array" on the free store (malloced, e.t.c.).
If the characters read by gets() are more than the space allocated you ge=
t
into problems. If you want to guarantee that the length of the string is =
not
more than the allocated space use fgets().


Ioannis

* Ioannis Vranos
* Programming pages: http://members.nbci.com/noicys
* Alternative URL: http://run.to/noicys


> -----Original Message-----
> From: dev...@li...
> [mailto:dev...@li...]On Behalf Of
> Albert Vilella Bertran
> Sent: Thursday, April 19, 2001 11:10 AM
> To: dev...@li...
> Subject: [Dev-C++] gets,fgets,getline
>
>
> I have experienced problems with the function "gets".
> It seems that in my program is using memory addresses that shouldn't us=
e
> because it writes on some of my dynamic memory space.
>
> I have read the "The GNU C Library" and while trying to use
> "getline" instead
> of "gets", it seems that getline is not in "stdio.h". In fact,
> searching for it
> in "stdio.h" like >Ctrl+F-> "getline", it doesn't found it.
>
> I dunno what's happening.
>
> Does anybody know anything I can try?
>
>
> _______________________________________________________________
> Do You Yahoo!?
> Env=EDa mensajes instant=E1neos y recibe alertas de correo con
> Yahoo! Messenger - http://messenger.yahoo.es
>
> _______________________________________________
> Dev-cpp-users mailing list
> Dev...@li...
> http://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>

[Dev-C++] Storage Allocation Hooks. How to mcheck

[<vil...@ya...>]

Hi,
I have been looking at The GNU C Library Help, and trying to compile
with "-lmcheck" as is explained in "Heap Consistency Checking":

" ... The easiest way to arrange to call mcheck early enough is to use the
option -lmcheck when you link your program; then you don't need to modify your
program source at all. ..."

I don't succeed, because I don't have several files in a project, I only have
one file to compile and I put "-lmcheck" in "Add the following commands when
calling compiler" in the Compiler Options,

I dunno how to do it.

Thanks in advance


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