Help newlib TZ parser #7699
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Help newlib TZ parser #7699
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Timezones coded with <±nn>±nn<±nn>[±nn][,...] are incorrectly parsed by newlib's TZ parser. In these timezones, <±nn> is used because there is no matching name like in other timezones. Example: 'GMT0BST' for London, (GMT is known, BST is 'British Summer Time'). Example: '<+1030>-10:30<+11>-11' for Lord Howe Island. These names GMT,BST,CET,... are meant to be human readable but are useless in our use case. Replacing <±nn> occurences by UNK allows newlib's TZ parser to nicely interpret all timezones. Ultimately, newlib should handle such tz descriptor. Until then, they are handled by this script.
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earlephilhower approved these changes Nov 10, 2020
| Would you like to put in a bug on the newlib repo for this change? https://github.com/earlephilhower/newlib-xtensa |
earlephilhower added a commit to earlephilhower/Arduino that referenced this pull request Nov 12, 2020
Undoes the change in esp8266#7699 and fixed esp8266#7690 root cause. Newlib did not support timezone names of the form "<[+-]?[0-9]+>" and would parse the offset using the <name>. Fix newlib tzset parser with earlephilhower/newlib-xtensa#14 and undo the UNK changes used as an expedient workaround.
earlephilhower added a commit that referenced this pull request Nov 12, 2020
Undoes the change in #7699 and fixed #7690 root cause. Newlib did not support timezone names of the form "<[+-]?[0-9]+>" and would parse the offset using the <name>. Fix newlib tzset parser with earlephilhower/newlib-xtensa#14 earlephilhower/newlib-xtensa#15 and undo the UNK changes used as an expedient workaround.
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Timezones coded with
<±nn>±nn<±nn>[±nn][,...]are incorrectly parsed by newlib's TZ parser.In these timezones,
<±nn>is used because there is no matching name like in other timezones.Example:
GMT0BSTfor London, (GMT is known, BST isBritish Summer Time).<+1030>-10:30<+11>-11for Lord Howe Island.These names GMT,BST,CET,... are meant to be human readable but are useless in our use case.
Replacing
<±nn>occurences byUNKnown allows newlib's TZ parser to nicely interpret all timezones.UNK-10:30UNK-11is then correctly parsed.Ultimately, newlib should handle such TZ descriptors. Until then, they are handled by this script.
Fixes #7690