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| Anonymous | Login | 2023-09-23 21:38 UTC |
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| ID | Category | Severity | Type | Date Submitted | Last Update | ||
| 0001643 | [1003.1(2016/18)/Issue7+TC2] System Interfaces | Editorial | Error | 2023-03-21 11:13 | 2023-06-13 10:45 | ||
| Reporter | bhaible | View Status | public | ||||
| Assigned To | |||||||
| Priority | normal | Resolution | Accepted | ||||
| Status | Applied | ||||||
| Name | Bruno Haible | ||||||
| Organization | GNU | ||||||
| User Reference | |||||||
| Section | fprintf | ||||||
| Page Number | 913 | ||||||
| Line Number | 30960 | ||||||
| Interp Status | --- | ||||||
| Final Accepted Text | |||||||
| Summary | 0001643: fprintf %lc: wrong reference to the current conversion specification | ||||||
| Description |
The reference to "the wint_t argument to the ls conversion specification" makes no sense, since an ls conversion specification takes a wchar_t* argument. In ISO C 99 this paragraph reads "If an l length modifier is present, the wint_t argument is converted as if by an ls conversion specification with no precision and an argument that points to the initial element of a two-element array of wchar_t, the first element containing the wint_t argument to the lc conversion specification and the second a null wide character." So, apparently POSIX and ISO C 99 are based on a common ancestor document, and the reference to "ls" has been corrected in ISO C 99, i.e. changed to "lc". |
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| Desired Action | Change "the wint_t argument to the ls conversion specification" to "the wint_t argument to the lc conversion specification". | ||||||
| Tags | applied_after_i8d3, tc3-2008 | ||||||
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Notes |
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(0006214) eblake (manager) 2023-03-21 15:44 |
For my own reference as much as anything else, Bruno found this while reporting a corner-case bug in glibc's printf(): https://sourceware.org/bugzilla/show_bug.cgi?id=30257 [^] and which he found to be also present in most other tested libc except musl. Namely, narrow printf("%lc", (wint_t)0) is surprisingly required to produce 0 bytes instead of the multibyte sequence for the null character, because that is the behavior of %ls with no precision when handed a wchar_t array with a null character in the first index; and this behavior is both different than the wprintf behavior, and from the %c behavior with a NUL byte. |
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Issue History |
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| Date Modified | Username | Field | Change |
| 2023-03-21 11:13 | bhaible | New Issue | |
| 2023-03-21 11:13 | bhaible | Name | => Bruno Haible |
| 2023-03-21 11:13 | bhaible | Organization | => GNU |
| 2023-03-21 11:13 | bhaible | Section | => fprintf |
| 2023-03-21 11:13 | bhaible | Page Number | => 913 |
| 2023-03-21 11:13 | bhaible | Line Number | => 30960 |
| 2023-03-21 15:44 | eblake | Note Added: 0006214 | |
| 2023-03-28 16:32 | eblake | Relationship added | parent of 0001647 |
| 2023-04-20 16:22 | geoffclare | Relationship replaced | related to 0001647 |
| 2023-04-20 16:23 | geoffclare | Interp Status | => --- |
| 2023-04-20 16:23 | geoffclare | Status | New => Resolved |
| 2023-04-20 16:23 | geoffclare | Resolution | Open => Accepted |
| 2023-04-20 16:23 | geoffclare | Tag Attached: tc3-2008 | |
| 2023-06-13 10:45 | geoffclare | Status | Resolved => Applied |
| 2023-06-13 10:46 | geoffclare | Tag Attached: applied_after_i8d3 | |
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