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Fix bogus logic for zic -P option.

The quick hack I added to zic to dump out currently-in-use timezoneabbreviations turns out to have a nasty bug: within each zone, it wasprinting the last "struct ttinfo" to be *defined*, not necessarily thelast one in use. This was mainly a problem in zones that had changed themeaning of their zone abbreviation (to another GMT offset value) and laterchanged it back.As a result of this error, we'd missed out updating the tznames/ filesfor some jurisdictions that have changed their zone abbreviations sincethe tznames/ files were originally created. I'll address the missing dataupdates in a separate commit.

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src/timezone
- zic.c

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+18

-15

lines changed

`‎src/timezone/zic.c`

Lines changed: 18 additions & 15 deletions

Original file line number	Diff line number	Diff line change
`@@ -1770,7 +1770,25 @@ writezone(const char name, const char string)`
`1770`	`1770`	`if (pass==1)`
`1771`	`1771`	`puttzcode((long)ats[i],fp);`
`1772`	`1772`	`else`
	`1773`	`+{`
`1773`	`1774`	`puttzcode64(ats[i],fp);`
	`1775`	`+`
	`1776`	`+/* Print current timezone abbreviations if requested */`
	`1777`	`+if (print_abbrevs&&`
	`1778`	`+(ats[i] >=print_cutoff\|\|i==thistimelim-1))`
	`1779`	`+{`
	`1780`	`+unsignedchartm=typemap[types[i]];`
	`1781`	`+char*thisabbrev=&thischars[indmap[abbrinds[tm]]];`
	`1782`	`+`
	`1783`	`+/* filter out assorted junk entries */`
	`1784`	`+if (strcmp(thisabbrev,GRANDPARENTED)!=0&&`
	`1785`	`+strcmp(thisabbrev,"zzz")!=0)`
	`1786`	`+fprintf(stdout,"%s\t%ld%s\n",`
	`1787`	`+thisabbrev,`
	`1788`	`+gmtoffs[tm],`
	`1789`	`+isdsts[tm] ?"\tD" :"");`
	`1790`	`+}`
	`1791`	`+}`
`1774`	`1792`	`for (i=thistimei;i<thistimelim;++i)`
`1775`	`1793`	`{`
`1776`	`1794`	`unsignedcharuc;`
`@@ -1787,21 +1805,6 @@ writezone(const char name, const char string)`
`1787`	`1805`	`puttzcode(gmtoffs[i],fp);`
`1788`	`1806`	`(void)putc(isdsts[i],fp);`
`1789`	`1807`	`(void)putc((unsignedchar)indmap[abbrinds[i]],fp);`
`1790`		`-`
`1791`		`-/* Print current timezone abbreviations if requested */`
`1792`		`-if (print_abbrevs&&pass==2&&`
`1793`		`-(ats[i] >=print_cutoff\|\|i==typecnt-1))`
`1794`		`-{`
`1795`		`-char*thisabbrev=&thischars[indmap[abbrinds[i]]];`
`1796`		`-`
`1797`		`-/* filter out assorted junk entries */`
`1798`		`-if (strcmp(thisabbrev,GRANDPARENTED)!=0&&`
`1799`		`-strcmp(thisabbrev,"zzz")!=0)`
`1800`		`-fprintf(stdout,"%s\t%ld%s\n",`
`1801`		`-thisabbrev,`
`1802`		`-gmtoffs[i],`
`1803`		`-isdsts[i] ?"\tD" :"");`
`1804`		`-}`
`1805`	`1808`	`}`
`1806`	`1809`	`if (thischarcnt!=0)`
`1807`	`1810`	`(void)fwrite((void*)thischars,`

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Commit909e48d

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`‎src/timezone/zic.c`

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