Use install instead of cp, support for DESTDIR env variable

Makefile

@@ -13,7 +13,12 @@ PREFIX ?= /usr/local
 INCLUDEDIR = $(PREFIX)/include
 LIBDIR = $(PREFIX)/lib
 
-all: $(STATIC_LIB) $(SHARED_LIB)
+TEST_SRC = test.c
+TEST_BIN = test.elf
+
+all: $(STATIC_LIB) $(SHARED_LIB) $(TEST_BIN)
+test: $(TEST_BIN)
+	./$<
 
 %.o: %.c
 	$(CC) $(CFLAGS) -c $< -o $@
@@ -24,11 +29,15 @@ $(STATIC_LIB): $(OBJS)
 $(SHARED_LIB): $(OBJS)
 	$(CC) -shared -o $@ $^
 
+$(TEST_BIN): $(TEST_SRC) $(STATIC_LIB)
+	$(CC) -Wall -Ihash -o $@ $(TEST_SRC) $(STATIC_LIB)
+
 install: $(STATIC_LIB) $(SHARED_LIB)
-	mkdir -p $(DESTDIR)$(INCLUDEDIR)/hash
-	cp -r hash/*.h $(DESTDIR)$(INCLUDEDIR)/hash/
-	mkdir -p $(DESTDIR)$(LIBDIR)
-	cp $(STATIC_LIB) $(SHARED_LIB) $(DESTDIR)$(LIBDIR)/
+	install -d $(DESTDIR)$(INCLUDEDIR)/hash
+	install -m 644 hash/*.h $(DESTDIR)$(INCLUDEDIR)/hash/
+	install -d $(DESTDIR)$(LIBDIR)
+	install -m 644 $(STATIC_LIB) $(DESTDIR)$(LIBDIR)/
+	install -m 755 $(SHARED_LIB) $(DESTDIR)$(LIBDIR)/
 	@echo "Installed libraries to $(DESTDIR)$(LIBDIR) and headers to $(DESTDIR)$(INCLUDEDIR)/hash"
 
 uninstall:
@@ -37,6 +46,6 @@ uninstall:
 	@echo "Uninstalled libraries from $(DESTDIR)$(LIBDIR) and headers from $(DESTDIR)$(INCLUDEDIR)/hash"
 
 clean:
-	rm -f $(OBJS) $(STATIC_LIB) $(SHARED_LIB)
+	rm -f $(OBJS) $(STATIC_LIB) $(SHARED_LIB) $(TEST_BIN)
 
-.PHONY: all clean install uninstall
+.PHONY: all clean install uninstall test

test.c

@@ -0,0 +1,31 @@
+#include "hash/crc32.h"
+#include "hash/djb2.h"
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+    assert(crc32("123456789", 9) == 0xCBF43926);
+    assert(crc32("", 0) == 0x00000000);
+    assert(crc32("a", 1) == 0xE8B7BE43);
+    assert(crc32("A", 1) == 0xD3D99E8B);
+    assert(crc32("hello", 5) == 0x3610A686);
+    assert(crc32("The quick brown fox jumps over the lazy dog", 43) == 0x414FA339);
+    assert(crc32("The quick brown fox jumps over the lazy dog.", 44) == 0x519025E9);
+
+    /* Keep in mind the update api requires initialization and finalization */
+    uint32_t crc = crc32_init();
+    crc = crc32_update_raw(crc, "a", 1);
+    crc = crc32_finalize(crc);
+
+    assert(crc == crc32("a", 1));
+    assert(crc == 0xE8B7BE43);
+
+    assert(djb2("Hello") == 0x000000310D4F2079);
+    assert(djb2("a") == 0x000000000002B606);
+    assert(djb2("A") == 0x000000000002B5E6);
+    assert(djb2("123456789") == 0x0377821035CDBB82);
+
+    printf("All good!\n");
+    exit(EXIT_SUCCESS);
+}