VariationsService now supports wildcard in min/max version

base/version.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/version.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/string_number_conversions.h"
 #include "base/string_split.h"
 #include "base/string_util.h"
 
+namespace {
+
+// This function parses the |numbers| vector representing the different numbers
+// inside the version string and constructs a vector of valid integers. It stops
+// when it reaches an invalid item (including the wildcard character). |parsed|
+// is the resulting integer vector.
+bool ParseVersionNumbers(const std::vector<std::string>& numbers,
+                         std::vector<uint16>& parsed) {
+  for (std::vector<std::string>::const_iterator i = numbers.begin();
+       i != numbers.end(); ++i) {
+    int num;
+    if (!base::StringToInt(*i, &num))
+      return false;
+    if (num < 0)
+      return false;
+    const uint16 max = 0xFFFF;
+    if (num > max)
+      return false;
+    // This throws out things like +3, or 032.
+    if (base::IntToString(num) != *i)
+      return false;
+    parsed.push_back(static_cast<uint16>(num));
+  }
+  return true;
+}
+
+}  // namespace
+
 Version::Version() {
 }
 
 Version::~Version() {
 }
 
 Version::Version(const std::string& version_str) {
   std::vector<std::string> numbers;
   base::SplitString(version_str, '.', &numbers);
   if (numbers.empty())
     return;
   std::vector<uint16> parsed;
-  for (std::vector<std::string>::iterator i = numbers.begin();
-       i != numbers.end(); ++i) {
-    int num;
-    if (!base::StringToInt(*i, &num))
-      return;
-    if (num < 0)
-      return;
-    const uint16 max = 0xFFFF;
-    if (num > max)
-      return;
-    // This throws out things like +3, or 032.
-    if (base::IntToString(num) != *i)
-      return;
-    parsed.push_back(static_cast<uint16>(num));
-  }
+  if (!ParseVersionNumbers(numbers, parsed))
+    return;
   components_.swap(parsed);
 }
 
 bool Version::IsValid() const {
   return (!components_.empty());
 }
 
+// static
+bool Version::IsValidWildcard(const std::string& version_str) {
+  if (version_str.at(version_str.length() - 1) != '*') {

[Alexei Svitkine (slow), 2012/06/19 14:53:17]

This will crash if version_str is empty.

[Mathieu, 2012/06/19 17:38:55]

Done. Added a check for empty string.

+    Version version(version_str);
+    return version.IsValid();
+  } else {
+    std::string no_wc_version_str = version_str.substr(0,
+                                                       version_str.size() - 2);
+    Version version(no_wc_version_str);
+    return version.IsValid();
+  }
+}
+
 bool Version::IsOlderThan(const std::string& version_str) const {
   Version proposed_ver(version_str);
   if (!proposed_ver.IsValid())
     return false;
   return (CompareTo(proposed_ver) < 0);
 }
 
+int Version::CompareToWildcard(const std::string& version_str) const {
+  DCHECK(IsValid());
+  DCHECK(Version::IsValidWildcard(version_str));
+
+  // Default behavior if the string doesn't end with a wildcard.
+  if (version_str.at(version_str.length() - 1) != '*') {
+    Version version(version_str);
+    DCHECK(version.IsValid());
+    return CompareTo(version);
+  }
+
+  // Removing the * and returning immediately if the argument version is less
+  // or equal (the * won't affect here).
+  Version other_version(version_str.substr(0, version_str.size() - 2));
+  int comparison = CompareTo(other_version);
+  if (comparison == -1 || comparison == 0)
+    return comparison;
+
+  // Trying to catch the equality case 1.2 vs 1.*. In all other cases, it truly
+  // is a "greater than" case.
+  std::vector<std::string> other_numbers;
+  base::SplitString(version_str, '.', &other_numbers);
+  std::vector<uint16> parsed;
+  ParseVersionNumbers(other_numbers, parsed);  // Will not parse the *.
+
+  DCHECK_GT(parsed.size(), 0UL);
+  for (size_t i = 0; i < parsed.size(); ++i) {
+    if (components_[i] != parsed[i])
+      return 1;
+  }
+  return 0;
+}
+
 // TODO(cpu): remove this method.
 Version* Version::GetVersionFromString(const std::string& version_str) {
   Version* vers = new Version(version_str);
   if (vers->IsValid()) {
     return vers;
   }
   delete vers;
   return NULL;
 }
 
@@ skipping 35 matching lines @@
   DCHECK(IsValid());
   std::string version_str;
   size_t count = components_.size();
   for (size_t i = 0; i < count - 1; ++i) {
     version_str.append(base::IntToString(components_[i]));
     version_str.append(".");
   }
   version_str.append(base::IntToString(components_[count - 1]));
   return version_str;
 }