Initial commit

src/main/java/TP2/llvm/LLVMString.java

@@ -0,0 +1,5 @@
+package TP2.llvm;
+
+public record LLVMString(String data, int size) {
+
+}

src/main/java/TP2/llvm/Utils.java

@@ -0,0 +1,81 @@
+package TP2.llvm;
+
+import java.util.regex.Pattern;
+import java.util.regex.Matcher;
+
+public class Utils {
+  private static int tmp = 0;
+  private static int lab = 0;
+  private static int glob = 0;
+  private final static Pattern re = Pattern.compile("\\\\n");
+
+  /**
+   * Generate a new unique local identifier (starting with %tmp)
+   * 
+   * @return the identifier
+   */
+  public static String newtmp() {
+    return newVar("tmp");
+  }
+
+  /**
+   * Generate a new unique local identifier (starting with %) for a variable
+   * 
+   * @return the identifier
+   */
+  public static String newVar(String prefix) {
+    tmp++;
+    return "%" + prefix + tmp;
+  }
+
+  /**
+   * <p>
+   * generate a new unique label starting with str
+   * </p>
+   * 
+   * ex: newlab("if") may return "if24"
+   * 
+   * @param str the start of the label
+   * @return the label name
+   */
+  public static String newlab(String str) {
+    lab++;
+    return str + lab;
+  }
+
+  /**
+   * generate a new unique global identifier (starting with @)
+   * 
+   * @param str the start of the name of the identifier
+   * @return the name of the identifier
+   */
+  public static String newglob(String str) {
+    glob++;
+    return "@" + str + glob;
+  }
+
+  /**
+   * Transform escaped newlines ('\' 'n') into newline form suitable for LLVM and
+   * append the NUL character (end of string)
+   * 
+   * @param str the input string
+   * @return a pair: the new String, and its size (according to LLVM)
+   */
+  public static LLVMString stringTransform(String str) {
+    Matcher m = re.matcher(str);
+    StringBuffer res = new StringBuffer();
+    int count = 0;
+
+    while (m.find()) {
+      m.appendReplacement(res, "\\\\0A");
+      count++;
+    }
+
+    m.appendTail(res).append("\\00");
+
+    // + 1 for \00
+    // - 1 by \n because each ('\' '\n') is transformed into one char
+    return new LLVMString(res.toString(), 1 + str.length() - count);
+  }
+
+}