OmniSciDB  c07336695a
StringFunctions.cpp
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1 /*
2  * Copyright 2017 MapD Technologies, Inc.
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 #include <cstdint>
18 #include "../Shared/funcannotations.h"
19 
20 #ifdef EXECUTE_INCLUDE
21 
22 extern "C" NEVER_INLINE DEVICE int32_t
23 char_length_encoded(const char* str, const int32_t str_len) { // assumes utf8
24  int32_t i = 0, char_count = 0;
25  while (i < str_len) {
26  const unsigned char ch_masked = str[i] & 0xc0;
27  if (ch_masked != 0x80) {
28  char_count++;
29  }
30  i++;
31  }
32  return char_count;
33 }
34 
35 extern "C" NEVER_INLINE DEVICE int32_t
36 char_length_encoded_nullable(const char* str,
37  const int32_t str_len,
38  const int32_t int_null) { // assumes utf8
39  if (!str) {
40  return int_null;
41  }
42  return char_length_encoded(str, str_len);
43 }
44 
45 #endif // EXECUTE_INCLUDE
#define DEVICE
#define NEVER_INLINE