| /** |
| * Copyright 2010 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| // Copyright 2007 Google Inc. All Rights Reserved. |
| // Author: dpeng@google.com (Daniel Peng) |
| |
| #ifndef STRINGS_ASCII_CTYPE_H__ |
| #define STRINGS_ASCII_CTYPE_H__ |
| |
| #include "base/basictypes.h" |
| |
| // ---------------------------------------------------------------------- |
| // ascii_isalpha() |
| // ascii_isdigit() |
| // ascii_isalnum() |
| // ascii_isspace() |
| // ascii_ispunct() |
| // ascii_isblank() |
| // ascii_iscntrl() |
| // ascii_isxdigit() |
| // ascii_isprint() |
| // ascii_isgraph() |
| // ascii_isupper() |
| // ascii_islower() |
| // ascii_tolower() |
| // ascii_toupper() |
| // The ctype.h versions of these routines are slow with some |
| // compilers and/or architectures, perhaps because of locale |
| // issues. These versions work for ascii only: they return |
| // false for everything above \x7f (which means they return |
| // false for any byte from any non-ascii UTF8 character). |
| // |
| // The individual bits do not have names because the array definition |
| // is already tightly coupled to this, and names would make it harder |
| // to read and debug. |
| // |
| // This is an example of the benchmark times from the unittest: |
| // $ strings/ascii_ctype_test --benchmarks=all --heap_check= |
| // Benchmark Time(ns) CPU(ns) Iterations |
| // -------------------------------------------------- |
| // BM_Identity 121 120 5785985 2027.0 MB/s |
| // BM_isalpha 1603 1597 511027 152.9 MB/s |
| // BM_ascii_isalpha 223 224 3111595 1088.5 MB/s |
| // BM_isdigit 181 183 3825722 1336.4 MB/s |
| // BM_ascii_isdigit 236 239 2929312 1023.3 MB/s |
| // BM_isalnum 1623 1615 460596 151.2 MB/s |
| // BM_ascii_isalnum 253 255 2745518 959.1 MB/s |
| // BM_isspace 1264 1258 555639 194.1 MB/s |
| // BM_ascii_isspace 253 255 2745507 959.1 MB/s |
| // BM_ispunct 1324 1317 555639 185.3 MB/s |
| // BM_ascii_ispunct 252 255 2745507 959.1 MB/s |
| // BM_isblank 1433 1426 511027 171.2 MB/s |
| // BM_ascii_isblank 253 254 2745518 960.5 MB/s |
| // BM_iscntrl 1643 1634 530383 149.4 MB/s |
| // BM_ascii_iscntrl 252 255 2745518 959.1 MB/s |
| // BM_isxdigit 1826 1817 414265 134.3 MB/s |
| // BM_ascii_isxdigit 258 260 2692712 939.3 MB/s |
| // BM_isprint 1677 1669 419224 146.2 MB/s |
| // BM_ascii_isprint 237 239 2929312 1021.8 MB/s |
| // BM_isgraph 1436 1429 507324 170.9 MB/s |
| // BM_ascii_isgraph 237 239 2929312 1021.8 MB/s |
| // BM_isupper 1550 1544 463647 158.1 MB/s |
| // BM_ascii_isupper 237 239 2929312 1021.8 MB/s |
| // BM_islower 1301 1294 538544 188.7 MB/s |
| // BM_ascii_islower 237 239 2929312 1023.3 MB/s |
| // BM_isascii 182 181 3846746 1345.7 MB/s |
| // BM_ascii_isascii 209 211 3318039 1159.1 MB/s |
| // BM_tolower 1743 1764 397786 138.4 MB/s |
| // BM_ascii_tolower 210 211 3318039 1155.8 MB/s |
| // BM_toupper 1742 1764 397788 138.4 MB/s |
| // BM_ascii_toupper 212 211 3302401 1156.9 MB/s |
| // |
| // ---------------------------------------------------------------------- |
| |
| #define kApb kAsciiPropertyBits |
| extern const uint8 kAsciiPropertyBits[256]; |
| static inline bool ascii_isalpha(unsigned char c) { return kApb[c] & 0x01; } |
| static inline bool ascii_isalnum(unsigned char c) { return kApb[c] & 0x04; } |
| static inline bool ascii_isspace(unsigned char c) { return kApb[c] & 0x08; } |
| static inline bool ascii_ispunct(unsigned char c) { return kApb[c] & 0x10; } |
| static inline bool ascii_isblank(unsigned char c) { return kApb[c] & 0x20; } |
| static inline bool ascii_iscntrl(unsigned char c) { return kApb[c] & 0x40; } |
| static inline bool ascii_isxdigit(unsigned char c) { return kApb[c] & 0x80; } |
| static inline bool ascii_isdigit(unsigned char c) { return c >= '0' && c <= '9'; } |
| static inline bool ascii_isprint(unsigned char c) { return c >= 32 && c < 127; } |
| static inline bool ascii_isgraph(unsigned char c) { return c > 32 && c < 127; } |
| static inline bool ascii_isupper(unsigned char c) { return c >= 'A' && c <= 'Z'; } |
| static inline bool ascii_islower(unsigned char c) { return c >= 'a' && c <= 'z'; } |
| static inline bool ascii_isascii(unsigned char c) { |
| return static_cast<signed char>(c) >= 0; |
| } |
| #undef kApb |
| |
| extern const char kAsciiToLower[256]; |
| static inline char ascii_tolower(unsigned char c) { return kAsciiToLower[c]; } |
| extern const char kAsciiToUpper[256]; |
| static inline char ascii_toupper(unsigned char c) { return kAsciiToUpper[c]; } |
| |
| #endif // STRINGS_ASCII_CTYPE_H__ |
