ISO8859_1Encoding.caseMap

jruby · Dec 23, 2017 · fb25693 · fb25693
1 parent 84ca5cd
commit fb25693
Showing 2 changed files with 38 additions and 0 deletions.
diff --git a/src/org/jcodings/ISOEncoding.java b/src/org/jcodings/ISOEncoding.java
@@ -20,6 +20,7 @@
 package org.jcodings;
 
 public abstract class ISOEncoding extends CaseFoldMapEncoding {
+    public static int SHARP_s = 0xdf;
 
     protected ISOEncoding(String name, short[]CTypeTable, byte[]LowerCaseTable, int[][]CaseFoldMap) {
         this(name, CTypeTable, LowerCaseTable, CaseFoldMap, true);

diff --git a/src/org/jcodings/specific/ISO8859_1Encoding.java b/src/org/jcodings/specific/ISO8859_1Encoding.java
@@ -21,7 +21,10 @@
 
 import org.jcodings.ApplyAllCaseFoldFunction;
 import org.jcodings.CaseFoldCodeItem;
+import org.jcodings.Config;
 import org.jcodings.ISOEncoding;
+import org.jcodings.IntHolder;
+import org.jcodings.constants.CharacterType;
 
 public final class ISO8859_1Encoding extends ISOEncoding {
 
@@ -85,6 +88,40 @@ public void applyAllCaseFold(int flag, ApplyAllCaseFoldFunction fun, Object arg)
         return EMPTY_FOLD_CODES;
     }
 
+    @Override
+    public int caseMap(IntHolder flagP, byte[] bytes, IntHolder pp, int end, byte[] to, int toP, int toEnd) {
+        int toStart = toP;
+        int flags = flagP.value;
+
+        while (pp.value < end && toP < toEnd) {
+            int code = bytes[pp.value++] & 0xff;
+            if (code == SHARP_s) {
+                if ((flags & Config.CASE_UPCASE) != 0) {
+                    flags |= Config.CASE_MODIFIED;
+                    to[toP++] = 'S';
+                    code = (flags & Config.CASE_TITLECASE) != 0 ? 's' : 'S';
+                } else if ((flags & Config.CASE_FOLD) != 0) {
+                    flags |= Config.CASE_MODIFIED;
+                    to[toP++] = 's';
+                    code = 's';
+                }
+            } else if ((ISO8859_1CtypeTable[code] & CharacterType.BIT_UPPER) != 0 && (flags & (Config.CASE_DOWNCASE | Config.CASE_FOLD)) != 0) {
+                flags |= Config.CASE_MODIFIED;
+                code += 0x20;
+            } else if (code == 0xAA || code == 0xBA || code == 0xB5 || code == 0xFF) {
+            } else if ((ISO8859_1CtypeTable[code] & CharacterType.BIT_LOWER) != 0 && (flags & Config.CASE_UPCASE) != 0) {
+                flags |= Config.CASE_MODIFIED;
+                code -= 0x20;
+            }
+            to[toP++] = (byte)code;
+            if ((flags & Config.CASE_TITLECASE) != 0) {
+                flags ^= (Config.CASE_UPCASE | Config.CASE_DOWNCASE | Config.CASE_TITLECASE);
+            }
+        }
+        flagP.value = flags;
+        return toP - toStart;
+    }
+
     static final short ISO8859_1CtypeTable[] = {
         0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
         0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,