View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001177 | 1003.1(2016/18)/Issue7+TC2 | Base Definitions and Headers | public | 2017-12-16 05:26 | 2019-02-14 17:07 |
| Reporter | shware_systems | Assigned To | |||
| Priority | normal | Severity | Objection | Type | Error |
| Status | Closed | Resolution | Duplicate | ||
| Name | Mark Ziegast | ||||
| Organization | SHware Systems Dev. | ||||
| User Reference | |||||
| Section | XBD 13, <stdint.h> | ||||
| Page Number | 348 | ||||
| Line Number | 11817-8 | ||||
| Interp Status | --- | ||||
| Final Accepted Text | |||||
| Summary | 0001177: Misstated permitted limits on signed types | ||||
| Description | The sentence: An N-bit signed type has values in the range −2^(N−1) or 1−2^(N−1) to 2^(N−1)−1, while an N-bit unsigned type has values in the range 0 to 2^N−1. is in error. Because POSIX requires int8, 16, and 32_t types be defined, for the least, fast, and built-in types to have equivalent ranges for the required compilation environments the 1-2^(N-1) limit is not permitted. That limit, while implied as usable by the C standard, is for environments that don't define the exact width types because they use -2^(N-1) as a trap value or as a negative zero. | ||||
| Desired Action | Delete the sentence and append to Line 11814: For the required compilation environments (Xref c99 Extended Description) an N-bit signed type has values in the range −2^(N−1) to 2^(N−1)−1, while an N-bit unsigned type has values in the range 0 to 2^N−1. An implementation may support additional compilation environments where the minimum value for a signed type may be 1-2^(N-1), but these shall not define via typedef the exact width types below. and shade this CX, as it is an expression of behavior the C standard considers implementation-defined, per c99/c1x 6.2.6.2, par 2. This makes normative the Rationale assertions in <stdint.h> and XRAT A.3 that two's complement is required. | ||||
| Tags | No tags attached. | ||||
| duplicate of | 0001108 | Closed | LONG_MIN must be <= -2147483648 |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2017-12-16 05:26 | shware_systems | New Issue | |
| 2017-12-16 05:26 | shware_systems | Name | => Mark Ziegast |
| 2017-12-16 05:26 | shware_systems | Organization | => SHware Systems Dev. |
| 2017-12-16 05:26 | shware_systems | Section | => XBD 13, <stdint.h> |
| 2017-12-16 05:26 | shware_systems | Page Number | => 348 |
| 2017-12-16 05:26 | shware_systems | Line Number | => 11817-8 |
| 2019-02-14 17:03 | eblake | Relationship added | related to 0001108 |
| 2019-02-14 17:04 | nick | Interp Status | => --- |
| 2019-02-14 17:04 | nick | Note Added: 0004251 | |
| 2019-02-14 17:04 | nick | Status | New => Closed |
| 2019-02-14 17:04 | nick | Resolution | Open => Duplicate |
| 2019-02-14 17:07 | Don Cragun | Relationship replaced | duplicate of 0001108 |
