[PowerRename] Introduce advanced counter functionality (#27895)

src/modules/powerrename/lib/Enumerating.cpp

@@ -0,0 +1,46 @@
+#include <pch.h>
+
+#include "Enumerating.h"
+
+#include <common\utils\string_utils.h>
+
+std::vector<EnumOptions> parseEnumOptions(const std::wstring& replaceWith)
+{
+    static const std::wregex enumStartRegex(LR"(start=(\d+))");
+    static const std::wregex enumIncrementRegex(LR"(increment=(-?\d+))");
+    static const std::wregex enumPaddingRegex(LR"(padding=(\d+))");
+
+    std::string buf;
+    std::vector<EnumOptions> options;
+    std::wregex enumGroupRegex(LR"(\$\{.*?\})");
+    for (std::wsregex_iterator i{ begin(replaceWith), end(replaceWith), enumGroupRegex }, end; i != end; ++i)
+    {
+        std::wsmatch match = *i;
+        std::wstring matchString = match.str();
+
+        EnumOptions option;
+        option.replaceStrSpan.offset = match.position();
+        option.replaceStrSpan.length = match.length();
+
+        std::wsmatch subMatch;
+        if (std::regex_search(matchString, subMatch, enumStartRegex))
+        {
+            buf = unwide(subMatch[1].str());
+            std::from_chars(buf.data(), buf.data() + buf.size(), option.start.emplace());
+        }
+        if (std::regex_search(matchString, subMatch, enumIncrementRegex))
+        {
+            buf = unwide(subMatch[1].str());
+            std::from_chars(buf.data(), buf.data() + buf.size(), option.increment.emplace());
+        }
+        if (std::regex_search(matchString, subMatch, enumPaddingRegex))
+        {
+            buf = unwide(subMatch[1].str());
+            std::from_chars(buf.data(), buf.data() + buf.size(), option.padding.emplace());
+        }
+
+        options.emplace_back(std::move(option));
+    }
+
+    return options;
+}