Add test for "kmemset"

Makefile

@@ -9,13 +9,15 @@ run: run-iso
 all:     all-kernel   all-iso   all-libk   all-test
 clean: clean-kernel clean-iso clean-libk clean-test
 
+test: run-test
+
 all-kernel: all-libk
 	make all -C arch
 
 clean-kernel:
 	make clean -C arch
 
-run-iso: all-kernel
+run-iso: all-iso
 	make run -C iso
 
 all-iso: all-kernel
@@ -30,8 +32,13 @@ all-libk:
 clean-libk:
 	make clean -C libk
 
-test-libk: all-libk
+test-libk: all-test
 	make run -C test/libk
 
+run-test: test-libk
+
+all-test: all-libk
+	make all -C test/libk
+
 clean-test:
 	make clean -C test/libk

libk/memset.c

@@ -1,8 +1,8 @@
 void kmemset(void *const buffer, const unsigned char value, const unsigned int size)
 {
-    const unsigned char *end = buffer + size;
+    unsigned char *const s = buffer;
 
-    for (unsigned char *p = buffer; p < end; ++p) {
-        *p = value;
+    for (unsigned int i = 0; i < size; ++i) {
+        s[i] = value;
     }
 }

test/libk/Makefile

@@ -2,7 +2,7 @@ CC = $(CCPREFIX)gcc
 
 CFLAGS = -std=gnu99 -Wall -Wextra
 
-BINS = strlen.bin
+BINS = strlen.bin memset.bin
 
 run: all $(addprefix run-, $(BINS))
 

test/libk/memset.c

@@ -0,0 +1,23 @@
+#include <kernelmq/stdlib.h>
+
+#include <assert.h>
+
+#include <string.h>
+
+int main()
+{
+    char buffer[7];
+
+    kmemset(buffer, 0, 1);
+    assert(strlen(buffer) == 0);
+
+    kmemset(buffer,     1, 3);
+    kmemset(&buffer[3], 0, 4);
+    assert(strlen(buffer) == 3);
+
+    strcpy(buffer, "qwerty");
+    kmemset(&buffer[2], 'a', 2);
+    assert(!strcmp(buffer, "qwaaty"));
+
+    return 0;
+}