int8_t typedef problem
Ralf Corsepius
corsepiu at faw.uni-ulm.de
Tue Jan 7 15:44:12 UTC 2003
Am Die, 2003-01-07 um 15.29 schrieb Stephen Holford:
> Hi Joel
>
> >
> > Thanks. What about the other intXX_t types? Should they say signed?
>
> Not necessary as all arithmetic types other than chars and bitfields are
> signed by default. One thing to note with the "signed" keyword is it
> isn't K&R compatible,
Does RTEMS still support pre-ANSI C? I hope we don't and I am pretty
sure RTEMS will not compile using a KnR-compiler.
> it was introduced in the C89 standard.
intXX_t types are C99.
>From SUSV3:
<citation>
Exact-width integer types
The typedef name int N _t designates a signed integer type with
width N, no padding bits, and a two's-complement representation.
Thus, int8_t denotes a signed integer type with a width of
exactly 8 bits.
The typedef name uint N _t designates an unsigned integer type
with width N. Thus, uint24_t denotes an unsigned integer type
with a width of exactly 24 bits.
[CX] [Option Start] The following types are required:
int8_t
int16_t
int32_t
uint8_t
uint16_t
uint32_t[Option End]
If an implementation provides integer types with width 64 that
meet these requirements, then the following types are required:
int64_t uint64_t
<citation>
Ralf
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