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1 /*
2  * Copyright (C) 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_
18 #define LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_
19 
20 #include <math.h>
21 
22 namespace le_fx {
23 
24 namespace sigmod {
25 
26 template <typename T>
SearchIndex(const T x_data[],T x,int start_index,int end_index)27 int SearchIndex(const T x_data[],
28                 T x,
29                 int start_index,
30                 int end_index) {
31   int start = start_index;
32   int end = end_index;
33   while (end > start + 1) {
34     int i = (end + start) / 2;
35     if (x_data[i] > x) {
36       end = i;
37     } else {
38       start = i;
39     }
40   }
41   return start;
42 }
43 
44 }  // namespace sigmod
45 
46 }  // namespace le_fx
47 
48 #endif  // LE_FX_ENGINE_DSP_CORE_BASIC_INL_H_
49