From 54941eddfd9cf2b40e489258e2fbf4bd1c90311e Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Mon, 18 Dec 2017 19:33:56 -0500
Subject: [PATCH] update case mappings to unicode 10.0

the mapping tables and code are not automatically generated; they were
produced by comparing the output of towupper/towlower against the
mappings in the UCD, ignoring characters that were previously excluded
from case mappings or from alphabetic status (micro sign and circled
letters), and adding table entries or code for everything else
missing.

based very loosely on a patch by Reini Urban.
---
 src/ctype/towctrans.c | 43 +++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 41 insertions(+), 2 deletions(-)

diff --git a/src/ctype/towctrans.c b/src/ctype/towctrans.c
index cf13a862..12355af1 100644
--- a/src/ctype/towctrans.c
+++ b/src/ctype/towctrans.c
@@ -29,7 +29,7 @@ static const struct {
 	CASELACE(0x4c1,0x4cd),
 	CASELACE(0x4d0,0x50e),
 
-	CASELACE(0x514,0x526),
+	CASELACE(0x514,0x52e),
 	CASEMAP(0x531,0x556,0x561),
 
 	CASELACE(0x01a0,0x01a4),
@@ -63,6 +63,10 @@ static const struct {
 	CASEMAP(0x1ff8,0x1ff9,0x1f78),
 	CASEMAP(0x1ffa,0x1ffb,0x1f7c),
 
+	CASEMAP(0x13f0,0x13f5,0x13f8),
+	CASELACE(0xa698,0xa69a),
+	CASELACE(0xa796,0xa79e),
+
 	CASELACE(0x246,0x24e),
 	CASELACE(0x510,0x512),
 	CASEMAP(0x2160,0x216f,0x2170),
@@ -82,6 +86,8 @@ static const struct {
 	CASELACE(0xa790,0xa792),
 	CASELACE(0xa7a0,0xa7a8),
 
+	CASELACE(0xa7b4,0xa7b6),
+
 	CASEMAP(0xff21,0xff3a,0xff41),
 	{ 0,0,0 }
 };
@@ -216,6 +222,26 @@ static const unsigned short pairs[][2] = {
 	{ 0x395, 0x3f5 },
 	{ 0x3cf, 0x3d7 },
 
+	{ 0xa7ab, 0x25c },
+	{ 0xa7ac, 0x261 },
+	{ 0xa7ad, 0x26c },
+	{ 0xa7ae, 0x26a },
+	{ 0xa7b0, 0x29e },
+	{ 0xa7b1, 0x287 },
+	{ 0xa7b2, 0x29d },
+	{ 0xa7b3, 0xab53 },
+
+	/* special cyrillic lowercase forms */
+	{ 0x412, 0x1c80 },
+	{ 0x414, 0x1c81 },
+	{ 0x41e, 0x1c82 },
+	{ 0x421, 0x1c83 },
+	{ 0x422, 0x1c84 },
+	{ 0x422, 0x1c85 },
+	{ 0x42a, 0x1c86 },
+	{ 0x462, 0x1c87 },
+	{ 0xa64a, 0x1c88 },
+
 	{ 0,0 }
 };
 
@@ -229,7 +255,8 @@ static wchar_t __towcase(wchar_t wc, int lower)
 	if (!iswalpha(wc)
 	 || (unsigned)wc - 0x0600 <= 0x0fff-0x0600
 	 || (unsigned)wc - 0x2e00 <= 0xa63f-0x2e00
-	 || (unsigned)wc - 0xa800 <= 0xfeff-0xa800)
+	 || (unsigned)wc - 0xa800 <= 0xab52-0xa800
+	 || (unsigned)wc - 0xabc0 <= 0xfeff-0xabc0)
 		return wc;
 	/* special case because the diff between upper/lower is too big */
 	if (lower && (unsigned)wc - 0x10a0 < 0x2e)
@@ -238,6 +265,10 @@ static wchar_t __towcase(wchar_t wc, int lower)
 	if (!lower && (unsigned)wc - 0x2d00 < 0x26)
 		if (wc>0x2d25 && wc != 0x2d27 && wc != 0x2d2d) return wc;
 		else return wc + 0x10a0 - 0x2d00;
+	if (lower && (unsigned)wc - 0x13a0 < 0x50)
+		return wc + 0xab70 - 0x13a0;
+	if (!lower && (unsigned)wc - 0xab70 < 0x50)
+		return wc + 0x13a0 - 0xab70;
 	for (i=0; casemaps[i].len; i++) {
 		int base = casemaps[i].upper + (lmask & casemaps[i].lower);
 		if ((unsigned)wc-base < casemaps[i].len) {
@@ -252,6 +283,14 @@ static wchar_t __towcase(wchar_t wc, int lower)
 	}
 	if ((unsigned)wc - (0x10428 - 0x28*lower) < 0x28)
 		return wc - 0x28 + 0x50*lower;
+	if ((unsigned)wc - (0x104d8 - 0x28*lower) < 0x24)
+		return wc - 0x28 + 0x50*lower;
+	if ((unsigned)wc - (0x10cc0 - 0x40*lower) < 0x33)
+		return wc - 0x40 + 0x80*lower;
+	if ((unsigned)wc - (0x118c0 - 0x20*lower) < 0x20)
+		return wc - 0x20 + 0x40*lower;
+	if ((unsigned)wc - (0x1e922 - 0x22*lower) < 0x22)
+		return wc - 0x22 + 0x44*lower;
 	return wc;
 }