Add fen loader and a test script for c

makefile

@@ -7,11 +7,17 @@ INCDIR   := engine/include
 BUILDDIR := build
 LIBNAME  := libchess
 
-SRC := $(wildcard $(SRCDIR)/*.c)
+# Exclude test.c from the shared lib build
+SRC := $(filter-out $(SRCDIR)/test.c,$(wildcard $(SRCDIR)/*.c))
 OBJ := $(patsubst $(SRCDIR)/%.c,$(BUILDDIR)/%.o,$(SRC))
 LIB := $(BUILDDIR)/$(LIBNAME).so
 
-.PHONY: all clean test
+# ---- test executable (engine/src/test.c) ----
+TESTSRC := $(SRCDIR)/test.c
+TESTOBJ := $(BUILDDIR)/test.o
+TESTBIN := $(BUILDDIR)/print_board
+
+.PHONY: all clean test test-exe run
 
 all: $(LIB)
 
@@ -24,6 +30,17 @@ $(BUILDDIR)/%.o: $(SRCDIR)/%.c | $(BUILDDIR)
 $(LIB): $(OBJ)
 	$(CC) $(LDFLAGS) -o $@ $^
 
+c-test-exe: $(TESTBIN)
+
+$(TESTOBJ): $(TESTSRC) | $(BUILDDIR)
+	$(CC) -std=c11 -Wall -Wextra -O2 -I$(INCDIR) -c $< -o $@
+
+$(TESTBIN): $(TESTOBJ) $(LIB)
+	$(CC) -O2 -o $@ $(TESTOBJ) -L$(BUILDDIR) -lchess -Wl,-rpath,'$$ORIGIN'
+
+run-c-test: test-exe
+	LD_LIBRARY_PATH=$(BUILDDIR) $(TESTBIN) $(FEN)
+
 clean:
 	@echo "Cleaning build and Python caches..."
 	@rm -rf $(BUILDDIR)
@@ -31,7 +48,6 @@ clean:
 	@find . -type d -name ".pytest_cache"  -exec rm -rf {} +
 	@find . -type f \( -name "*.pyc" -o -name "*.pyo" \) -delete
 
-# Always rebuild, and always clean afterward (even if tests fail)
 test:
 	@$(MAKE) clean
 	@$(MAKE) all