deps: Intl: Check in "small-icu" 57.1

* this commit has "small" ICU 57.1.
See other related commit for tools to generate this commit.

Fixes: https://github.com/nodejs/node/issues/3476
PR-URL: https://github.com/nodejs/node/pull/6088
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 70 insertions, 0 deletions

diff --git a/deps/icu-small/source/common/unistr_case_locale.cpp b/deps/icu-small/source/common/unistr_case_locale.cpp
new file mode 100644
index 0000000000..a8d5704431
--- /dev/null
+++ b/deps/icu-small/source/common/unistr_case_locale.cpp
@@ -0,0 +1,70 @@
+/*
+*******************************************************************************
+*   Copyright (C) 2011, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+*   file name:  unistr_case_locale.cpp
+*   encoding:   US-ASCII
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2011may31
+*   created by: Markus W. Scherer
+*
+*   Locale-sensitive case mapping functions (ones that call uloc_getDefault())
+*   were moved here to break dependency cycles among parts of the common library.
+*/
+
+#include "unicode/utypes.h"
+#include "unicode/locid.h"
+#include "unicode/unistr.h"
+#include "cmemory.h"
+#include "ustr_imp.h"
+
+U_NAMESPACE_BEGIN
+
+//========================================
+// Write implementation
+//========================================
+
+/*
+ * Set parameters on an empty UCaseMap, for UCaseMap-less API functions.
+ * Do this fast because it is called with every function call.
+ */
+static inline void
+setTempCaseMap(UCaseMap *csm, const char *locale) {
+    if(csm->csp==NULL) {
+        csm->csp=ucase_getSingleton();
+    }
+    if(locale!=NULL && locale[0]==0) {
+        csm->locale[0]=0;
+    } else {
+        ustrcase_setTempCaseMapLocale(csm, locale);
+    }
+}
+
+UnicodeString &
+UnicodeString::toLower() {
+  return toLower(Locale::getDefault());
+}
+
+UnicodeString &
+UnicodeString::toLower(const Locale &locale) {
+  UCaseMap csm=UCASEMAP_INITIALIZER;
+  setTempCaseMap(&csm, locale.getName());
+  return caseMap(&csm, ustrcase_internalToLower);
+}
+
+UnicodeString &
+UnicodeString::toUpper() {
+  return toUpper(Locale::getDefault());
+}
+
+UnicodeString &
+UnicodeString::toUpper(const Locale &locale) {
+  UCaseMap csm=UCASEMAP_INITIALIZER;
+  setTempCaseMap(&csm, locale.getName());
+  return caseMap(&csm, ustrcase_internalToUpper);
+}
+
+U_NAMESPACE_END