1 //===- VersionTuple.cpp - Version Number Handling ---------------*- C++ -*-===//
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
12 //===----------------------------------------------------------------------===//
41 static bool parseInt(StringRef &input, unsigned &value) {  in parseInt()  argument
42   assert(value == 0);  in parseInt()
43   if (input.empty())  in parseInt()
46   char next = input[0];  in parseInt()
47   input = input.substr(1);  in parseInt()
50   value = (unsigned)(next - '0');  in parseInt()
52   while (!input.empty()) {  in parseInt()
53     next = input[0];  in parseInt()
56     input = input.substr(1);  in parseInt()
57     value = value * 10 + (unsigned)(next - '0');  in parseInt()
63 bool VersionTuple::tryParse(StringRef input) {  in tryParse()  argument
66   // Parse the major version, [0-9]+  in tryParse()
67   if (parseInt(input, major))  in tryParse()
70   if (input.empty()) {  in tryParse()
75   // If we're not done, parse the minor version, \.[0-9]+  in tryParse()
76   if (input[0] != '.')  in tryParse()
78   input = input.substr(1);  in tryParse()
79   if (parseInt(input, minor))  in tryParse()
82   if (input.empty()) {  in tryParse()
87   // If we're not done, parse the micro version, \.[0-9]+  in tryParse()
88   if (!input.consume_front("."))  in tryParse()
90   if (parseInt(input, micro))  in tryParse()
93   if (input.empty()) {  in tryParse()
98   // If we're not done, parse the micro version, \.[0-9]+  in tryParse()
99   if (!input.consume_front("."))  in tryParse()
101   if (parseInt(input, build))  in tryParse()
105   if (!input.empty())  in tryParse()