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C99 integer types
From: |
John Millaway |
Subject: |
C99 integer types |
Date: |
Mon, 25 Nov 2002 12:08:02 -0500 (EST) |
> Can someone post a confirmation that the int*_t types are optional?
> If that's the case, then we have a very different problem on our
> hands. (Section numbers from the C99 standard or quotations or urls
> so we can all check up on it.)
The exact-width integers are optional. The 'at-least' integers are
required. Here are the relevant sections of the C99 January 18, 1999
*draft*:
7.18.1.1 Exact-width integer types
[#1] The typedef name intN_t designates a signed integer
type with width N. Thus, int8_t denotes a signed integer
type with a width of exactly 8 bits.
[#2] The typedef name uintN_t designates an unsigned integer
type with width N. Thus, uint24_t denotes an unsigned
integer type with a width of exactly 24 bits.
[#3] These types are optional. However, if an
implementation provides integer types with widths of 8, 16,
32, or 64 bits, it shall define the corresponding typedef
names.
7.18.1.2 Minimum-width integer types
[#1] The typedef name int_leastN_t designates a signed
integer type with a width of at least N, such that no signed
integer type with lesser size has at least the specified
width. Thus, int_least32_t denotes a signed integer type
with a width of at least 32 bits.
[#2] The typedef name uint_leastN_t designates an unsigned
integer type with a width of at least N, such that no
unsigned integer type with lesser size has at least the
specified width. Thus, uint_least16_t denotes an unsigned
integer type with a width of at least 16 bits.
[#3] The following types are required:
int_least8_t uint_least8_t
int_least16_t uint_least16_t
int_least32_t uint_least32_t
int_least64_t uint_least64_t
- Re: flex beta 2.5.23 released, (continued)
- Re: flex beta 2.5.23 released, John Millaway, 2002/11/23
- Re: flex beta 2.5.23 released, Bruce Lilly, 2002/11/25
- Re: flex beta 2.5.23 released, W. L. Estes, 2002/11/25
- Re: flex beta 2.5.23 released, Bruce Lilly, 2002/11/25
- Re: flex beta 2.5.23 released, W. L. Estes, 2002/11/25
- Re: flex beta 2.5.23 released, Bruce Lilly, 2002/11/25
- Re: flex beta 2.5.23 released, W. L. Estes, 2002/11/25
- Re: flex beta 2.5.23 released, John Millaway, 2002/11/25
- Re: flex beta 2.5.23 released, W. L. Estes, 2002/11/25
- Re: flex beta 2.5.23 released, Bruce Lilly, 2002/11/25
- C99 integer types,
John Millaway <=
- Re: flex beta 2.5.23 released, W. L. Estes, 2002/11/25
- Re: flex beta 2.5.23 released, Bruce Lilly, 2002/11/25
- Re: flex beta 2.5.23 released, W. L. Estes, 2002/11/25
- Re: flex beta 2.5.23 released, Bruce Lilly, 2002/11/25
- Re: flex beta 2.5.23 released, W. L. Estes, 2002/11/25
- Re: flex beta 2.5.23 released, Bruce Lilly, 2002/11/25