type of sizeof

[Tommi =?UTF-8?B?TcOka2l0YWxv?=]

Hi,

what is the type of sizeof?

Here is some lines of code from a programm, which I'm porting to x86-64:

char buffer[512];
unsigned size = content_size;
while (size > 0
&& (in.read(buffer, std::min(sizeof(buffer), size)), in.gcount() > 0))
...

This does not work, because sizeof(buffer) is not of type unsigned. My
complier (g++-3.3 on linux) tells me:
error: no matching function for call to `min(long unsigned int,
unsigned int&)'

So what is the right (and portable) type to use here?


Tommi

 

[John Harrison]

Hi,

what is the type of sizeof?

size_t (or std::size_t if you prefer)

Here is some lines of code from a programm, which I'm porting to x86-64:

char buffer[512];
unsigned size = content_size;
while (size > 0
&& (in.read(buffer, std::min(sizeof(buffer), size)), in.gcount() > 0))
...

This does not work, because sizeof(buffer) is not of type unsigned. My
complier (g++-3.3 on linux) tells me:
error: no matching function for call to `min(long unsigned int,
unsigned int&)'

So what is the right (and portable) type to use here?

size_t.

john

Tommi