create `init/stdlib`

3 files changed, 20 insertions, 13 deletions

diff --git a/src/init/stdlib.c b/src/init/stdlib.c
new file mode 100644
index 0000000..6ed5a0a
--- /dev/null
+++ b/src/init/stdlib.c
@@ -0,0 +1,12 @@
+#include <init/stdlib.h>
+
+int memcmp(const void *s1, const void *s2, size_t n) {
+	const unsigned char *c1 = s1, *c2 = s2;
+	for (size_t i = 0; i < n; i++) {
+		if (c1[i] != c2[i]) {
+			if (c1[i] < c2[i])  return -1;
+			else                return 1;
+		}
+	}
+	return 0;
+}
diff --git a/src/init/stdlib.h b/src/init/stdlib.h
new file mode 100644
index 0000000..1cabc7a
--- /dev/null
+++ b/src/init/stdlib.h
@@ -0,0 +1,7 @@
+#pragma once
+#include <stddef.h>
+
+// TODO since this is shared with the kernel, maybe i could turn this into an
+//      stb-style header file
+
+int memcmp(const void *s1, const void *s2, size_t n);
diff --git a/src/init/tar.c b/src/init/tar.c
index 24adfce..a2b03df 100644
--- a/src/init/tar.c
+++ b/src/init/tar.c
@@ -1,11 +1,10 @@
+#include <init/stdlib.h>
 #include <shared/syscalls.h>
 #include <stdint.h>
 
 extern int tty_fd;
 
 static int oct_parse(char *str, size_t len);
-int memcmp(const void *s1, const void *s2, size_t n); // TODO move to a dedicated file
-
 
 void tar_driver(void *base) {
 	// iterate over all sectors, printing filenames
@@ -30,14 +29,3 @@ static int oct_parse(char *str, size_t len) {
 	}
 	return res;
 }
-
-int memcmp(const void *s1, const void *s2, size_t n) {
-	const unsigned char *c1 = s1, *c2 = s2;
-	for (size_t i = 0; i < n; i++) {
-		if (c1[i] != c2[i]) {
-			if (c1[i] < c2[i])  return -1;
-			else                return 1;
-		}
-	}
-	return 0;
-}