View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0001395 | 1003.1(2016/18)/Issue7+TC2 | Shell and Utilities | public | 2020-08-26 14:36 | 2024-06-11 09:08 |
| Reporter | geoffclare | Assigned To | |||
| Priority | normal | Severity | Objection | Type | Error |
| Status | Closed | Resolution | Accepted As Marked | ||
| Name | Geoff Clare | ||||
| Organization | The Open Group | ||||
| User Reference | |||||
| Section | awk | ||||
| Page Number | 2486 | ||||
| Line Number | 79925-79930 | ||||
| Interp Status | Approved | ||||
| Final Accepted Text | 0001395:0005225 | ||||
| Summary | 0001395: awk radix character in alternative conversion to atof() | ||||
| Description | In POSIX.2-1992 awk was required to convert string values to numeric values by the equivalent of:setlocale(LC_NUMERIC, ""); numeric_value = atof(string_value);Later when atof() was required to support hex floating point, "INF", and "NAN", this was changed to make the support of those new things optional in awk by saying the conversion is done either as above or by an alternative conversion that is a description of how atof() used to work in C90. At least, that's what was intended. Unfortunately, the description of this alternative conversion refers to <period> instead of the radix character. | ||||
| Desired Action | On page 2486 line 79925 section awk, change:... optionally containing a <period>to: ... optionally containing a radix character On page 2486 line 79928 section awk, change: The sequence starting with the first digit or the <period> (whichever occurs first) is interpreted as a floating constant of the C language, and if neither an exponent part nor a <period> appears, a <period> is assumed to follow the last digit in the string.to: The sequence starting with the first digit or the radix character (whichever occurs first) is interpreted as a floating constant of the C language, except that the radix character shall be used in place of a <period>, and if neither an exponent part nor a radix character appears, a radix character is assumed to follow the last digit in the string. | ||||
| Tags | tc3-2008 | ||||
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A floating constant of the C language, as a subset of strings in general, does presume <period> is always the radix character, according to the C grammar. POSIX extending the definition, to allow other chars, it seems should be CX shaded, in interface and utility descriptions, or these be reworded to defer directly to strtod(), which has appropriate text and shading already. |
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Interpretation response ------------------------ The standard states the requirements for string to number conversion in awk, and conforming implementations must conform to this. However, concerns have been raised about this which are being referred to the sponsor. Rationale: ------------- As stated in the RATIONALE the intent was to allow implementations to recognize floating-point constants according to either the ISO/IEC 9899: 1990 standard or ISO/IEC 9899: 1999 standard. The use of <period> in the text was an oversight. Notes to the Editor (not part of this interpretation): ------------------------------------------------------- On page 2486 line 79925 section awk, change: ... optionally containing a <period>to: ... optionally containing a radix character On page 2486 line 79928 section awk, change: The sequence starting with the first digit or the <period> (whichever occurs first) is interpreted as a floating constant of the C language, and if neither an exponent part nor a <period> appears, a <period> is assumed to follow the last digit in the string.to: The sequence starting with the first digit or the radix character (whichever occurs first) is interpreted as a floating constant of the C language, except that the radix character shall be used in place of a <period>, and if neither an exponent part nor a radix character appears, a radix character is assumed to follow the last digit in the string. On page 2487 lines 79966-79967, change: Each occurrence of the decimal point character from the current locale is changed to a <period>.to: Each occurrence of the radix character from the current locale is changed to a <period>. On page 2507 line 80823, add a sentence: Note that these forms do not use the radix character from the current locale; they always use a <period>. |
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Interpretation proposed: 16 Feb 2021 |
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Interpretation approved: 19 March 2021 |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2020-08-26 14:36 | geoffclare | New Issue | |
| 2020-08-26 14:36 | geoffclare | Name | => Geoff Clare |
| 2020-08-26 14:36 | geoffclare | Organization | => The Open Group |
| 2020-08-26 14:36 | geoffclare | Section | => awk |
| 2020-08-26 14:36 | geoffclare | Page Number | => 2486 |
| 2020-08-26 14:36 | geoffclare | Line Number | => 79925-79930 |
| 2020-08-26 14:36 | geoffclare | Interp Status | => --- |
| 2020-08-26 15:32 | shware_systems | Note Added: 0004946 | |
| 2020-08-26 15:33 | shware_systems | Note Edited: 0004946 | |
| 2021-02-04 17:31 | rhansen | Note Added: 0005225 | |
| 2021-02-04 17:32 | rhansen | Interp Status | --- => Pending |
| 2021-02-04 17:32 | rhansen | Final Accepted Text | => bugnot:5225 |
| 2021-02-04 17:32 | rhansen | Status | New => Interpretation Required |
| 2021-02-04 17:32 | rhansen | Resolution | Open => Accepted As Marked |
| 2021-02-04 17:32 | rhansen | Final Accepted Text | bugnot:5225 => 0001395:0005225 |
| 2021-02-04 17:33 | rhansen | Tag Attached: tc3-2008 | |
| 2021-02-16 14:36 | agadmin | Interp Status | Pending => Proposed |
| 2021-02-16 14:36 | agadmin | Note Added: 0005240 | |
| 2021-03-19 11:42 | agadmin | Interp Status | Proposed => Approved |
| 2021-03-19 11:42 | agadmin | Note Added: 0005289 | |
| 2021-03-25 14:22 | geoffclare | Status | Interpretation Required => Applied |
| 2024-06-11 09:08 | agadmin | Status | Applied => Closed |
