use safe memory lib and add memory leaks checks to CI

.github/workflows/ci.yml

@@ -32,7 +32,7 @@ jobs:
         run: |
           bison -d -Wcounterexamples lang.y -o lang.tab.c
           flex lang.l
-          gcc -o brainrot lib/hm.c lang.tab.c lex.yy.c ast.c -lfl -lm
+          gcc -o brainrot lib/hm.c lib/mem.c lang.tab.c lex.yy.c ast.c -lfl -lm
 
       - name: Upload build artifacts
         uses: actions/upload-artifact@v4
@@ -59,7 +59,7 @@ jobs:
       - name: Install Python and dependencies
         run: |
           sudo apt-get update
-          sudo apt-get install python3 python3-pip -y
+          sudo apt-get install python3 python3-pip valgrind -y
           python3 -m venv .venv
           source .venv/bin/activate
           pip install -r requirements.txt
@@ -70,3 +70,12 @@ jobs:
           source .venv/bin/activate
           pytest -v test_brainrot.py
         working-directory: tests
+
+      - name: Run Valgrind on all .brainrot tests
+        run: |
+          for f in test_cases/*.brainrot; do
+            echo "Running Valgrind on $f..."
+            valgrind --leak-check=full --error-exitcode=1 ./brainrot < "$f"
+            echo
+          done
+        working-directory: .

Makefile

@@ -1,10 +1,83 @@
-all:
-	bison -d -Wcounterexamples lang.y -o lang.tab.c
-	flex lang.l
-	gcc -o brainrot lib/hm.c lang.tab.c lex.yy.c ast.c -lfl -lm
+# Compiler and tool configurations
+CC := gcc
+BISON := bison
+FLEX := flex
+PYTHON := python3
 
+# Compiler and linker flags
+CFLAGS := -Wall -Wextra -O2
+LDFLAGS := -lfl -lm
+
+# Source files and directories
+SRC_DIR := lib
+SRCS := $(SRC_DIR)/hm.c $(SRC_DIR)/mem.c ast.c
+GENERATED_SRCS := lang.tab.c lex.yy.c
+ALL_SRCS := $(SRCS) $(GENERATED_SRCS)
+
+# Output files
+TARGET := brainrot
+BISON_OUTPUT := lang.tab.c
+FLEX_OUTPUT := lex.yy.c
+
+# Default target
+.PHONY: all
+all: $(TARGET)
+
+# Main executable build
+$(TARGET): $(ALL_SRCS)
+	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+
+# Generate parser files using Bison
+$(BISON_OUTPUT): lang.y
+	$(BISON) -d -Wcounterexamples $< -o $@
+
+# Generate lexer files using Flex
+$(FLEX_OUTPUT): lang.l
+	$(FLEX) $<
+
+# Run tests
+.PHONY: test
 test:
-	pytest -v
+	$(PYTHON) -m pytest -v
 
+# Clean build artifacts
+.PHONY: clean
 clean:
-	rm -rf lang.lex.c lang.tab.c lang.tab.h lex.yy.c brainrot
+	rm -f $(TARGET) $(GENERATED_SRCS) lang.tab.h
+	rm -f *.o
+
+# Check dependencies
+.PHONY: check-deps
+check-deps:
+	@command -v $(CC) >/dev/null 2>&1 || { echo "Error: gcc not found"; exit 1; }
+	@command -v $(BISON) >/dev/null 2>&1 || { echo "Error: bison not found"; exit 1; }
+	@command -v $(FLEX) >/dev/null 2>&1 || { echo "Error: flex not found"; exit 1; }
+	@command -v $(PYTHON) >/dev/null 2>&1 || { echo "Error: python3 not found"; exit 1; }
+	@$(PYTHON) -c "import pytest" >/dev/null 2>&1 || { echo "Error: pytest not found. Install with: pip install pytest"; exit 1; }
+
+# Development helper to rebuild everything from scratch
+.PHONY: rebuild
+rebuild: clean all
+
+# Format source files (requires clang-format)
+.PHONY: format
+format:
+	@command -v clang-format >/dev/null 2>&1 || { echo "Error: clang-format not found"; exit 1; }
+	find . -name "*.c" -o -name "*.h" | xargs clang-format -i
+
+# Show help
+.PHONY: help
+help:
+	@echo "Available targets:"
+	@echo "  all        : Build the main executable (default target)"
+	@echo "  test       : Run the test suite"
+	@echo "  clean      : Remove all generated files"
+	@echo "  check-deps : Verify all required dependencies are installed"
+	@echo "  rebuild    : Clean and rebuild the project"
+	@echo "  format     : Format source files using clang-format"
+	@echo "  help       : Show this help message"
+	@echo ""
+	@echo "Configuration:"
+	@echo "  CC        = $(CC)"
+	@echo "  CFLAGS    = $(CFLAGS)"
+	@echo "  LDFLAGS   = $(LDFLAGS)"