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 #include "util/strings/numbers.h" 18 19 #ifdef COMPILER_MSVC 20 #include <sstream> 21 #endif // COMPILER_MSVC 22 23 #include <stdlib.h> 24 25 namespace libtextclassifier2 { 26 27 bool ParseInt32(const char *c_str, int32 *value) { 28 char *temp; 29 30 // Short version of man strtol: 31 // 32 // strtol parses some optional whitespaces, an optional +/- sign, and next a 33 // succession of digits. If it finds some digits, it sets temp to point to 34 // the first character after that succession of digits and returns the parsed 35 // integer. 36 // 37 // If there were no digits at all, strtol() sets temp to be c_str (the start 38 // address) and returns 0. 39 *value = strtol(c_str, &temp, 0); // NOLINT 40 41 // temp != c_str means that the input string contained at least one digit (see 42 // above). *temp == '\0' means the input string does not contain any random 43 // chars after the number. 44 return (temp != c_str) && (*temp == '\0'); 45 } 46 47 bool ParseInt64(const char *c_str, int64 *value) { 48 char *temp; 49 *value = strtoll(c_str, &temp, 0); // NOLINT 50 51 // See comments inside ParseInt32. 52 return (temp != c_str) && (*temp == '\0'); 53 } 54 55 bool ParseDouble(const char *c_str, double *value) { 56 char *temp; 57 *value = strtod(c_str, &temp); 58 59 // See comments inside ParseInt32. 60 return (temp != c_str) && (*temp == '\0'); 61 } 62 63 #ifdef COMPILER_MSVC 64 std::string IntToString(int64 input) { 65 std::stringstream stream; 66 stream << input; 67 return stream.str(); 68 } 69 #else 70 std::string IntToString(int64 input) { 71 return std::to_string(input); 72 } 73 #endif // COMPILER_MSVC 74 75 } // namespace libtextclassifier2 76
