ICU-551.24.tar.gz

[apple/icu.git] / icuSources / common / uloc.cpp

diff --git a/icuSources/common/uloc.cpp b/icuSources/common/uloc.cpp
index dc17e7180afdf11f7fd8f2f5791bd81af7db44d2..88a221c6024fe370aa8cab459d0509450da22a1b 100644 (file)
--- a/icuSources/common/uloc.cpp
+++ b/icuSources/common/uloc.cpp
@@ -1,6 +1,6 @@
 /*
 **********************************************************************
-*   Copyright (C) 1997-2013, International Business Machines
+*   Copyright (C) 1997-2014, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 **********************************************************************
 *
@@ -38,7 +38,6 @@
 #include "umutex.h"
 #include "cstring.h"
 #include "cmemory.h"
-#include "ucln_cmn.h"
 #include "locmap.h"
 #include "uarrsort.h"
 #include "uenumimp.h"
@@ -2525,4 +2524,104 @@ uloc_acceptLanguage(char *result, int32_t resultAvailable,
     return -1;
 }
 
+U_CAPI const char* U_EXPORT2
+uloc_toUnicodeLocaleKey(const char* keyword)
+{
+    const char* bcpKey = ulocimp_toBcpKey(keyword);
+    if (bcpKey == NULL && ultag_isUnicodeLocaleKey(keyword, -1)) {
+        // unknown keyword, but syntax is fine..
+        return keyword;
+    }
+    return bcpKey;
+}
+
+U_CAPI const char* U_EXPORT2
+uloc_toUnicodeLocaleType(const char* keyword, const char* value)
+{
+    const char* bcpType = ulocimp_toBcpType(keyword, value, NULL, NULL);
+    if (bcpType == NULL && ultag_isUnicodeLocaleType(value, -1)) {
+        // unknown keyword, but syntax is fine..
+        return value;
+    }
+    return bcpType;
+}
+
+#define UPRV_ISDIGIT(c) (((c) >= '0') && ((c) <= '9'))
+#define UPRV_ISALPHANUM(c) (uprv_isASCIILetter(c) || UPRV_ISDIGIT(c) )
+
+static UBool
+isWellFormedLegacyKey(const char* legacyKey)
+{
+    const char* p = legacyKey;
+    while (*p) {
+        if (!UPRV_ISALPHANUM(*p)) {
+            return FALSE;
+        }
+        p++;
+    }
+    return TRUE;
+}
+
+static UBool
+isWellFormedLegacyType(const char* legacyType)
+{
+    const char* p = legacyType;
+    int32_t alphaNumLen = 0;
+    while (*p) {
+        if (*p == '_' || *p == '/' || *p == '-') {
+            if (alphaNumLen == 0) {
+                return FALSE;
+            }
+            alphaNumLen = 0;
+        } else if (UPRV_ISALPHANUM(*p)) {
+            alphaNumLen++;
+        } else {
+            return FALSE;
+        }
+        p++;
+    }
+    return (alphaNumLen != 0);
+}
+
+U_CAPI const char* U_EXPORT2
+uloc_toLegacyKey(const char* keyword)
+{
+    const char* legacyKey = ulocimp_toLegacyKey(keyword);
+    if (legacyKey == NULL) {
+        // Checks if the specified locale key is well-formed with the legacy locale syntax.
+        //
+        // Note:
+        //  Neither ICU nor LDML/CLDR provides the definition of keyword syntax.
+        //  However, a key should not contain '=' obviously. For now, all existing
+        //  keys are using ASCII alphabetic letters only. We won't add any new key
+        //  that is not compatible with the BCP 47 syntax. Therefore, we assume
+        //  a valid key consist from [0-9a-zA-Z], no symbols.
+        if (isWellFormedLegacyKey(keyword)) {
+            return keyword;
+        }
+    }
+    return legacyKey;
+}
+
+U_CAPI const char* U_EXPORT2
+uloc_toLegacyType(const char* keyword, const char* value)
+{
+    const char* legacyType = ulocimp_toLegacyType(keyword, value, NULL, NULL);
+    if (legacyType == NULL) {
+        // Checks if the specified locale type is well-formed with the legacy locale syntax.
+        //
+        // Note:
+        //  Neither ICU nor LDML/CLDR provides the definition of keyword syntax.
+        //  However, a type should not contain '=' obviously. For now, all existing
+        //  types are using ASCII alphabetic letters with a few symbol letters. We won't
+        //  add any new type that is not compatible with the BCP 47 syntax except timezone
+        //  IDs. For now, we assume a valid type start with [0-9a-zA-Z], but may contain
+        //  '-' '_' '/' in the middle.
+        if (isWellFormedLegacyType(value)) {
+            return value;
+        }
+    }
+    return legacyType;
+}
+
 /*eof*/