Hi,
I am looking at netinet/ip.h in linux code, and the declaration:
unsigned int ip_hl:4 make me confused.
I can understand "unsigned int ip_hl", but, what does ":4" here mean?
Very grateful to any answer.
Jian
2  4203 
In article <16************ **************@ posting.google. com>, jian wrote: I am looking at netinet/ip.h in linux code, and the declaration:
unsigned int ip_hl:4 make me confused.
It's probably a bit field in a struct.
--
Andreas Kähäri
On 2003-10-24, jian <ch**********@h otmail.com> wrote: I am looking at netinet/ip.h in linux code, and the declaration:
unsigned int ip_hl:4 make me confused.
I can understand "unsigned int ip_hl", but, what does ":4" here mean?
This kind of syntax is only allowed for a union or struct field, and
declares a bit-field. In this case, it is declaring ip_hl to hold
values that fit in 4 bits.
-- James This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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