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Fix psql's copy of utf2ucs() to match the backend's copy exactly;

in particular, propagate a fix in the test to see whether a UTF8 character haslength 4 bytes. This is likely of little real-world consequence because5-or-more-byte UTF8 sequences are not supported by Postgres nor seen anywherein the wild, but still we may as well get it right. Problem found by JosephAdams.Bug is aboriginal, so back-patch all the way.

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src/bin/psql
- mbprint.c

1 file changed

-10

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`‎src/bin/psql/mbprint.c‎`

Lines changed: 2 additions & 10 deletions

Original file line number	Diff line number	Diff line change
`@@ -3,7 +3,7 @@`
`3`	`3`	`*`
`4`	`4`	`* Copyright (c) 2000-2010, PostgreSQL Global Development Group`
`5`	`5`	`*`
`6`		`- * $PostgreSQL: pgsql/src/bin/psql/mbprint.c,v 1.38 2010/01/02 16:57:59 momjian Exp $`
	`6`	`+ * $PostgreSQL: pgsql/src/bin/psql/mbprint.c,v 1.39 2010/08/16 00:06:18 tgl Exp $`
`7`	`7`	`*`
`8`	`8`	`* XXX this file does not really belong in psql/. Perhaps move to libpq?`
`9`	`9`	`* It also seems that the mbvalidate function is redundant with existing`
`@@ -53,28 +53,20 @@ utf2ucs(const unsigned char *c)`
`53`	`53`	`if ((*c&0x80)==0)`
`54`	`54`	`return (pg_wchar)c[0];`
`55`	`55`	`elseif ((*c&0xe0)==0xc0)`
`56`		`-{`
`57`	`56`	`return (pg_wchar) (((c[0]&0x1f) <<6) \|`
`58`	`57`	`(c[1]&0x3f));`
`59`		`-}`
`60`	`58`	`elseif ((*c&0xf0)==0xe0)`
`61`		`-{`
`62`	`59`	`return (pg_wchar) (((c[0]&0x0f) <<12) \|`
`63`	`60`	`((c[1]&0x3f) <<6) \|`
`64`	`61`	`(c[2]&0x3f));`
`65`		`-}`
`66`		`-elseif ((*c&0xf0)==0xf0)`
`67`		`-{`
	`62`	`+elseif ((*c&0xf8)==0xf0)`
`68`	`63`	`return (pg_wchar) (((c[0]&0x07) <<18) \|`
`69`	`64`	`((c[1]&0x3f) <<12) \|`
`70`	`65`	`((c[2]&0x3f) <<6) \|`
`71`	`66`	`(c[3]&0x3f));`
`72`		`-}`
`73`	`67`	`else`
`74`		`-{`
`75`	`68`	`/* that is an invalid code on purpose */`
`76`	`69`	`return0xffffffff;`
`77`		`-}`
`78`	`70`	`}`
`79`	`71`
`80`	`72`

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`‎src/bin/psql/mbprint.c‎`

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