xiiregexbuilder

commit 67bde232f6840495b986c67fdc1cb629471e7803
parent e298cda282f22b28115114d4c1aabc3c0b2572fb
Author: RahulSannapureddy <rahul.sannapureddy@gmail.com>
Date:   Fri, 27 Mar 2026 09:04:36 +0530

Week 2: Add golden C++ reference regex engine (Part 2: Core logic)

Diffstat:
M
src/golden.cpp
 | 
41
+++++++++++++++++++++++++++++++++++++++++

1 file changed, 41 insertions(+), 0 deletions(-)
diff --git a/src/golden.cpp b/src/golden.cpp
@@ -29,3 +29,44 @@ int main(int argc, char* argv[]) {
         return 1;
     }
 
+    std::vector<std::string> regexes;
+    std::string line;
+    while (std::getline(regexFile, line)) {
+        std::string trimmed = trim(line);
+        if (trimmed.empty() || trimmed[0] == '#') continue;
+        regexes.push_back(trimmed);
+    }
+    regexFile.close();
+
+    std::ifstream testFile(testFilename);
+    if (!testFile.is_open()) {
+        std::cerr << "Failed to open " << testFilename << std::endl;
+        return 1;
+    }
+
+    std::vector<std::string> testStrings;
+    while (std::getline(testFile, line)) {
+        // Remove trailing \r\n
+        size_t last = line.find_last_not_of("\r\n");
+        std::string s = (last != std::string::npos) ? line.substr(0, last + 1) : (line.empty() ? "" : line);
+        
+        // Skip comments and blank lines if desired, but spec says "Each line is one test string"
+        // Let's at least skip the comment headers if they start with #
+        if (!s.empty() && s[0] == '#') continue;
+        if (s.empty()) {
+            // Check if it's truly a blank line (might be intentional empty string test)
+            // For safety, let's only skip if the raw line was empty or just whitespace
+            if (trim(line).empty()) continue;
+        }
+
+        testStrings.push_back(s);
+    }
+    testFile.close();
+
+    std::ofstream outFile(outputFilename);
+    if (!outFile.is_open()) {
+        std::cerr << "Failed to open " << outputFilename << " for writing." << std::endl;
+        return 1;
+    }
+
+    for (const auto& testStr : testStrings) {