| //===-- Collection of utils for implementing ctype functions-------*-C++-*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIBC_SRC_CTYPE_CTYPE_UTILS_H |
| #define LLVM_LIBC_SRC_CTYPE_CTYPE_UTILS_H |
| |
| namespace __llvm_libc { |
| namespace internal { |
| |
| // ------------------------------------------------------ |
| // Rationale: Since these classification functions are |
| // called in other functions, we will avoid the overhead |
| // of a function call by inlining them. |
| // ------------------------------------------------------ |
| |
| static inline int isalpha(unsigned ch) { return (ch | 32) - 'a' < 26; } |
| |
| static inline int isdigit(unsigned ch) { return (ch - '0') < 10; } |
| |
| static inline int isalnum(unsigned ch) { return isalpha(ch) || isdigit(ch); } |
| |
| static inline int isgraph(unsigned ch) { return 0x20 < ch && ch < 0x7f; } |
| |
| static inline int islower(unsigned ch) { return (ch - 'a') < 26; } |
| |
| static inline int isupper(unsigned ch) { return (ch - 'A') < 26; } |
| |
| } // namespace internal |
| } // namespace __llvm_libc |
| |
| #endif // LLVM_LIBC_SRC_CTYPE_CTYPE_UTILS_H |