Update ICU to 54.1 step 1

source/common/ustring.cpp

 /*
 ******************************************************************************
 *
-*   Copyright (C) 1998-2012, International Business Machines
+*   Copyright (C) 1998-2014, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ******************************************************************************
 *
 * File ustring.cpp
 *
 * Modification History:
 *
 *   Date        Name        Description
 *   12/07/98    bertrand    Creation.
@@ skipping 1464 matching lines @@
 /*
   Compute the hash by iterating sparsely over about 32 (up to 63)
   characters spaced evenly through the string.  For each character,
   multiply the previous hash value by a prime number and add the new
   character in, like a linear congruential random number generator,
   producing a pseudorandom deterministic value well distributed over
   the output range. [LIU]
 */
 
 #define STRING_HASH(TYPE, STR, STRLEN, DEREF) \
-    int32_t hash = 0;                         \
+    uint32_t hash = 0;                        \
     const TYPE *p = (const TYPE*) STR;        \
     if (p != NULL) {                          \
         int32_t len = (int32_t)(STRLEN);      \
         int32_t inc = ((len - 32) / 32) + 1;  \
         const TYPE *limit = p + len;          \
         while (p<limit) {                     \
             hash = (hash * 37) + DEREF;       \
             p += inc;                         \
         }                                     \
     }                                         \
-    return hash
+    return static_cast<int32_t>(hash)
 
 /* Used by UnicodeString to compute its hashcode - Not public API. */
 U_CAPI int32_t U_EXPORT2
 ustr_hashUCharsN(const UChar *str, int32_t length) {
     STRING_HASH(UChar, str, length, *p);
 }
 
 U_CAPI int32_t U_EXPORT2
 ustr_hashCharsN(const char *str, int32_t length) {
     STRING_HASH(uint8_t, str, length, *p);
 }
 
 U_CAPI int32_t U_EXPORT2
 ustr_hashICharsN(const char *str, int32_t length) {
     STRING_HASH(char, str, length, (uint8_t)uprv_tolower(*p));
 }