From 7b2b2869c9ee8155b440872e46ced3549123ee1d Mon Sep 17 00:00:00 2001
From: duerst <duerst@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Tue, 26 Jul 2016 07:33:18 +0000
Subject: * enc/windows_1257.c, test/ruby/enc/test_case_comprehensive.rb:  
 Implement non-ASCII case conversion for Windows-1257, by Sho Koike.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55752 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 enc/windows_1257.c | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 55 insertions(+), 1 deletion(-)

(limited to 'enc/windows_1257.c')

diff --git a/enc/windows_1257.c b/enc/windows_1257.c
index 557d4c00d7..40cdb969aa 100644
--- a/enc/windows_1257.c
+++ b/enc/windows_1257.c
@@ -225,6 +225,60 @@ get_case_fold_codes_by_str(OnigCaseFoldType flag,
 	     flag, p, end, items);
 }
 
+#define DOTLESS_i        (0xB9)
+#define I_WITH_DOT_ABOVE (0xA9)
+static int
+case_map (OnigCaseFoldType* flagP, const OnigUChar** pp,
+		const OnigUChar* end, OnigUChar* to, OnigUChar* to_end,
+		const struct OnigEncodingTypeST* enc)
+{
+  OnigCodePoint code;
+  OnigUChar *to_start = to;
+  OnigCaseFoldType flags = *flagP;
+
+  while (*pp<end && to<to_end) {
+    code = *(*pp)++;
+    if (code==SHARP_s) {
+      if (flags&ONIGENC_CASE_UPCASE) {
+	flags |= ONIGENC_CASE_MODIFIED;
+	*to++ = 'S';
+	code = (flags&ONIGENC_CASE_TITLECASE) ? 's' : 'S';
+      }
+      else if (flags&ONIGENC_CASE_FOLD) {
+	flags |= ONIGENC_CASE_MODIFIED;
+	*to++ = 's';
+	code = 's';
+      }
+    }
+    else if (code==0xB5) ;
+    else if ((EncCP1252_CtypeTable[code] & BIT_CTYPE_UPPER)
+	     && (flags & (ONIGENC_CASE_DOWNCASE|ONIGENC_CASE_FOLD))) {
+      flags |= ONIGENC_CASE_MODIFIED;
+      if (code=='I')
+	code = flags&ONIGENC_CASE_FOLD_TURKISH_AZERI ? DOTLESS_i : 'i';
+      else
+	code = ENC_CP1252_TO_LOWER_CASE(code);
+    }
+    else if ((EncCP1252_CtypeTable[code]&BIT_CTYPE_LOWER)
+	     && (flags&ONIGENC_CASE_UPCASE)) {
+      flags |= ONIGENC_CASE_MODIFIED;
+      if (code=='i')
+	code = flags&ONIGENC_CASE_FOLD_TURKISH_AZERI ? I_WITH_DOT_ABOVE : 'I';
+      else if (code==DOTLESS_i)
+	code = 'I';
+      else if (code>=0xB0 && code<=0xBF )
+	code -= 0x10;
+      else
+	code -= 0x20;
+    }
+    *to++ = code;
+    if (flags&ONIGENC_CASE_TITLECASE)  /* switch from titlecase to lowercase for capitalize */
+      flags ^= (ONIGENC_CASE_UPCASE|ONIGENC_CASE_DOWNCASE|ONIGENC_CASE_TITLECASE);
+  }
+  *flagP = flags;
+  return (int)(to-to_start);
+}
+
 OnigEncodingDefine(windows_1257, Windows_1257) = {
   onigenc_single_byte_mbc_enc_len,
   "Windows-1257",  /* name */
@@ -244,7 +298,7 @@ OnigEncodingDefine(windows_1257, Windows_1257) = {
   onigenc_always_true_is_allowed_reverse_match,
   0,
   ONIGENC_FLAG_NONE,
-  onigenc_single_byte_ascii_only_case_map,
+  case_map,
 };
 
 ENC_ALIAS("CP1257", "Windows-1257")
-- 
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