1 /* 2 * Copyright (C) 2017 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 LIBTEXTCLASSIFIER_UTIL_STRINGS_NUMBERS_H_ 18 #define LIBTEXTCLASSIFIER_UTIL_STRINGS_NUMBERS_H_ 19 20 #include <string> 21 22 #include "util/base/integral_types.h" 23 24 namespace libtextclassifier2 { 25 26 // Parses an int32 from a C-style string. 27 // 28 // c_str should point to a zero-terminated array of chars that contains the 29 // number representation as (a) "<radix-10-number>" (e.g., "721"), (b) 30 // "0x<radix-16-number>" (e.g., "0xa1"), or (c) "0<radix-8-number>" (e.g., 31 // "017201"). 32 // 33 // Stores parsed number into *value. Returns true on success, false on error. 34 // Note: presence of extra characters after the number counts as an error: e.g., 35 // parsing "123a" will return false due to the extra "a" (which is not a valid 36 // radix-10 digit). Parsing a string that does not contain any digit (e.g., "") 37 // is treated as an error: this function returns false. 38 bool ParseInt32(const char *c_str, int32 *value); 39 40 // Like ParseInt32, but for int64. 41 bool ParseInt64(const char *c_str, int64 *value); 42 43 // Like ParseInt32, but for double. 44 bool ParseDouble(const char *c_str, double *value); 45 46 // Converts an integer to string. Accepts (via implicit conversions) all common 47 // int types. 48 std::string IntToString(int64 input); 49 50 } // namespace libtextclassifier2 51 52 #endif // LIBTEXTCLASSIFIER_UTIL_STRINGS_NUMBERS_H_ 53
