lib/icu/Util: fold UCharToUTF8Throw() into UCharToUTF8()

src/lib/icu/Converter.cxx

@@ -100,7 +100,7 @@ DoConvert(iconv_t conv, const char *src)
 
 AllocatedString<char>
 IcuConverter::ToUTF8(const char *s) const
-{
+try {
 #ifdef HAVE_ICU
 	const ScopeLock protect(mutex);
 
@@ -123,6 +123,8 @@ IcuConverter::ToUTF8(const char *s) const
 #elif defined(HAVE_ICONV)
 	return DoConvert(to_utf8, s);
 #endif
+} catch (const std::runtime_error &) {
+	return nullptr;
 }
 
 AllocatedString<char>

src/lib/icu/Util.cxx

@@ -69,28 +69,6 @@ UCharToUTF8(ConstBuffer<UChar> src)
 		    src.data, src.size,
 		    &error_code);
 	if (U_FAILURE(error_code))
-		return nullptr;
-
-	dest[dest_length] = 0;
-	return AllocatedString<>::Donate(dest.release());
-}
-
-AllocatedString<>
-UCharToUTF8Throw(ConstBuffer<UChar> src)
-{
-	assert(!src.IsNull());
-
-	/* worst-case estimate */
-	size_t dest_capacity = 4 * src.size;
-
-	std::unique_ptr<char[]> dest(new char[dest_capacity + 1]);
-
-	UErrorCode error_code = U_ZERO_ERROR;
-	int32_t dest_length;
-	u_strToUTF8(dest.get(), dest_capacity, &dest_length,
-		    src.data, src.size,
-		    &error_code);
-	if (U_FAILURE(error_code))
 		throw std::runtime_error(u_errorName(error_code));
 
 	dest[dest_length] = 0;

src/lib/icu/Util.hxx

@@ -36,16 +36,10 @@ UCharFromUTF8(const char *src);
 
 /**
  * Wrapper for u_strToUTF8().
- */
-AllocatedString<char>
-UCharToUTF8(ConstBuffer<UChar> src);
-
-/**
- * Wrapper for u_strToUTF8().
  *
  * Throws std::runtime_error on error.
  */
 AllocatedString<char>
-UCharToUTF8Throw(ConstBuffer<UChar> src);
+UCharToUTF8(ConstBuffer<UChar> src);
 
 #endif