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
24namespace libtextclassifier {
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.
38bool ParseInt32(const char *c_str, int32 *value);
39
40// Like ParseInt32, but for int64.
41bool ParseInt64(const char *c_str, int64 *value);
42
43// Like ParseInt32, but for double.
44bool ParseDouble(const char *c_str, double *value);
45
46// Converts an integer to string.  Accepts (via implicit conversions) all common
47// int types.
48std::string IntToString(int64 input);
49
50
51}  // namespace libtextclassifier
52
53#endif  // LIBTEXTCLASSIFIER_UTIL_STRINGS_NUMBERS_H_
54