rcutils  master
C API providing common utilities and data structures.
isalnum_no_locale.h
Go to the documentation of this file.
1 // Copyright 2017 Open Source Robotics Foundation, Inc.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef RCUTILS__ISALNUM_NO_LOCALE_H_
16 #define RCUTILS__ISALNUM_NO_LOCALE_H_
17 
18 #ifdef __cplusplus
19 extern "C"
20 {
21 #endif
22 
24 static inline
25 bool
26 rcutils_isalnum_no_locale(char c)
27 {
28  // if in '0', ..., '9', then ok
29  if (c >= 0x30 /*0*/ && c <= 0x39 /*9*/) {
30  return true;
31  }
32  // if in 'A', ..., 'Z', then ok
33  if (c >= 0x41 /*A*/ && c <= 0x5a /*Z*/) {
34  return true;
35  }
36  // if in 'a', ..., 'z', then ok
37  if (c >= 0x61 /*a*/ && c <= 0x7a /*z*/) {
38  return true;
39  }
40  return false;
41 }
42 
43 #ifdef __cplusplus
44 }
45 #endif
46 
47 #endif // RCUTILS__ISALNUM_NO_LOCALE_H_