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, 39 insertions, 0 deletions

diff --git a/deps/icu-small/source/tools/toolutil/denseranges.h b/deps/icu-small/source/tools/toolutil/denseranges.h
new file mode 100644
index 0000000000..f9af561738
--- /dev/null
+++ b/deps/icu-small/source/tools/toolutil/denseranges.h
@@ -0,0 +1,39 @@
+/*
+*******************************************************************************
+*   Copyright (C) 2010, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*******************************************************************************
+*   file name:  denseranges.h
+*   encoding:   US-ASCII
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2010sep25
+*   created by: Markus W. Scherer
+*
+* Helper code for finding a small number of dense ranges.
+*/
+
+#ifndef __DENSERANGES_H__
+#define __DENSERANGES_H__
+
+#include "unicode/utypes.h"
+
+/**
+ * Does it make sense to write 1..capacity ranges?
+ * Returns 0 if not, otherwise the number of ranges.
+ * @param values Sorted array of signed-integer values.
+ * @param length Number of values.
+ * @param density Minimum average range density, in 256th. (0x100=100%=perfectly dense.)
+ *                Should be 0x80..0x100, must be 1..0x100.
+ * @param ranges Output ranges array.
+ * @param capacity Maximum number of ranges.
+ * @return Minimum number of ranges (at most capacity) that have the desired density,
+ *         or 0 if that density cannot be achieved.
+ */
+U_CAPI int32_t U_EXPORT2
+uprv_makeDenseRanges(const int32_t values[], int32_t length,
+                     int32_t density,
+                     int32_t ranges[][2], int32_t capacity);
+
+#endif  // __DENSERANGES_H__