Commit8d29905

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Add #define for UNICODE_CASEMAP_BUFSZ.

Useful for mapping a single codepoint at a time into astatically-allocated buffer.Discussion:https://postgr.es/m/450ceb6260cad30d7afdf155d991a9caafee7c0d.camel@j-davis.comReviewed-by: Chao Li <li.evan.chao@gmail.com>

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Original file line number	Diff line number	Diff line change
`@@ -26,6 +26,20 @@`
`26`	`26`	`/* use for libc locale names */`
`27`	`27`	`#defineLOCALE_NAME_BUFLEN 128`
`28`	`28`
	`29`	`+/*`
	`30`	`+ * Maximum number of bytes needed to map a single codepoint. Useful for`
	`31`	`+ * mapping and processing a single input codepoint at a time with a`
	`32`	`+ * statically-allocated buffer.`
	`33`	`+ *`
	`34`	`+ * With full case mapping, an input codepoint may be mapped to as many as`
	`35`	`+ * three output codepoints. See Unicode 16.0.0, section 5.18.2, "Change in`
	`36`	`+ * Length":`
	`37`	`+ *`
	`38`	`+ * https://www.unicode.org/versions/Unicode16.0.0/core-spec/chapter-5/#G29675`
	`39`	`+ */`
	`40`	`+#defineUNICODE_CASEMAP_LEN3`
	`41`	`+#defineUNICODE_CASEMAP_BUFSZ(UNICODE_CASEMAP_LEN * sizeof(char32_t))`
	`42`	`+`
`29`	`43`	`/* GUC settings */`
`30`	`44`	`externPGDLLIMPORTchar*locale_messages;`
`31`	`45`	`externPGDLLIMPORTchar*locale_monetary;`

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