JavaScriptCore-903.tar.gz

[apple/javascriptcore.git] / wtf / unicode / UnicodeMacrosFromICU.h

diff --git a/wtf/unicode/UnicodeMacrosFromICU.h b/wtf/unicode/UnicodeMacrosFromICU.h
new file mode 100644 (file)
index 0000000..09a7036
--- /dev/null
+++ b/wtf/unicode/UnicodeMacrosFromICU.h
@@ -0,0 +1,100 @@
+/*
+ *  Copyright (C) 1999-2004, International Business Machines Corporation and others.  All Rights Reserved.
+ *
+ */
+
+#ifndef UnicodeMacrosFromICU_h
+#define UnicodeMacrosFromICU_h
+
+// some defines from ICU
+
+#define U_IS_BMP(c) ((UChar32)(c)<=0xffff)
+#define U16_IS_LEAD(c) (((c)&0xfffffc00)==0xd800)
+#define U16_IS_TRAIL(c) (((c)&0xfffffc00)==0xdc00)
+#define U16_SURROGATE_OFFSET ((0xd800<<10UL)+0xdc00-0x10000)
+#define U16_GET_SUPPLEMENTARY(lead, trail) \
+    (((UChar32)(lead)<<10UL)+(UChar32)(trail)-U16_SURROGATE_OFFSET)
+
+#define U16_LEAD(supplementary) (UChar)(((supplementary)>>10)+0xd7c0)
+#define U16_TRAIL(supplementary) (UChar)(((supplementary)&0x3ff)|0xdc00)
+#define U16_LENGTH(c) ((uint32_t)(c) <= 0xffff ? 1 : 2)
+
+#define U_IS_SUPPLEMENTARY(c) ((UChar32)((c)-0x10000)<=0xfffff)
+#define U_IS_SURROGATE(c) (((c)&0xfffff800)==0xd800)
+#define U16_IS_SINGLE(c) !U_IS_SURROGATE(c)
+#define U16_IS_SURROGATE(c) U_IS_SURROGATE(c)
+#define U16_IS_SURROGATE_LEAD(c) (((c)&0x400)==0)
+
+#define U16_GET(s, start, i, length, c) { \
+    (c)=(s)[i]; \
+    if(U16_IS_SURROGATE(c)) { \
+        uint16_t __c2; \
+        if(U16_IS_SURROGATE_LEAD(c)) { \
+            if((i)+1<(length) && U16_IS_TRAIL(__c2=(s)[(i)+1])) { \
+                (c)=U16_GET_SUPPLEMENTARY((c), __c2); \
+            } \
+        } else { \
+            if((i)-1>=(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \
+                (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \
+            } \
+        } \
+    } \
+}
+
+#define U16_PREV(s, start, i, c) { \
+    (c)=(s)[--(i)]; \
+    if(U16_IS_TRAIL(c)) { \
+        uint16_t __c2; \
+        if((i)>(start) && U16_IS_LEAD(__c2=(s)[(i)-1])) { \
+            --(i); \
+            (c)=U16_GET_SUPPLEMENTARY(__c2, (c)); \
+        } \
+    } \
+}
+
+#define U16_BACK_1(s, start, i) { \
+    if(U16_IS_TRAIL((s)[--(i)]) && (i)>(start) && U16_IS_LEAD((s)[(i)-1])) { \
+        --(i); \
+    } \
+}
+
+#define U16_NEXT(s, i, length, c) { \
+    (c)=(s)[(i)++]; \
+    if(U16_IS_LEAD(c)) { \
+        uint16_t __c2; \
+        if((i)<(length) && U16_IS_TRAIL(__c2=(s)[(i)])) { \
+            ++(i); \
+            (c)=U16_GET_SUPPLEMENTARY((c), __c2); \
+        } \
+    } \
+}
+
+#define U16_FWD_1(s, i, length) { \
+    if(U16_IS_LEAD((s)[(i)++]) && (i)<(length) && U16_IS_TRAIL((s)[i])) { \
+        ++(i); \
+    } \
+}
+
+#define U_MASK(x) ((uint32_t)1<<(x))
+
+#define U8_MAX_LENGTH 4
+
+#define U8_APPEND_UNSAFE(s, i, c) { \
+    if((uint32_t)(c)<=0x7f) { \
+        (s)[(i)++]=(uint8_t)(c); \
+    } else { \
+        if((uint32_t)(c)<=0x7ff) { \
+            (s)[(i)++]=(uint8_t)(((c)>>6)|0xc0); \
+        } else { \
+            if((uint32_t)(c)<=0xffff) { \
+                (s)[(i)++]=(uint8_t)(((c)>>12)|0xe0); \
+            } else { \
+                (s)[(i)++]=(uint8_t)(((c)>>18)|0xf0); \
+                (s)[(i)++]=(uint8_t)((((c)>>12)&0x3f)|0x80); \
+            } \
+            (s)[(i)++]=(uint8_t)((((c)>>6)&0x3f)|0x80); \
+        } \
+        (s)[(i)++]=(uint8_t)(((c)&0x3f)|0x80); \
+    } \
+}
+#endif