Step 114: go-to-line

editor/src/GoToLine.h

@@ -0,0 +1,45 @@
+#pragma once
+// Step 114: Go-to-line parsing helpers
+
+#include <string>
+#include <cctype>
+
+inline std::string trimCopy(const std::string& s) {
+    size_t start = 0;
+    while (start < s.size() && std::isspace((unsigned char)s[start])) ++start;
+    size_t end = s.size();
+    while (end > start && std::isspace((unsigned char)s[end - 1])) --end;
+    return s.substr(start, end - start);
+}
+
+inline bool parseLineColInput(const std::string& input, int& outLine, int& outCol) {
+    std::string s = trimCopy(input);
+    if (s.empty()) return false;
+    if (!s.empty() && s[0] == ':') s = s.substr(1);
+
+    size_t colon = s.find(':');
+    std::string lineStr = (colon == std::string::npos) ? s : s.substr(0, colon);
+    std::string colStr = (colon == std::string::npos) ? "" : s.substr(colon + 1);
+
+    if (lineStr.empty()) return false;
+    int line = 0;
+    for (char c : lineStr) {
+        if (!std::isdigit((unsigned char)c)) return false;
+        line = line * 10 + (c - '0');
+    }
+    if (line <= 0) return false;
+
+    int col = 1;
+    if (!colStr.empty()) {
+        col = 0;
+        for (char c : colStr) {
+            if (!std::isdigit((unsigned char)c)) return false;
+            col = col * 10 + (c - '0');
+        }
+        if (col <= 0) return false;
+    }
+
+    outLine = line;
+    outCol = col;
+    return true;
+}