head: Add more standard headers

Signed-off-by: Ian Moffett <ian@mirocom.org>

usr/src/head/stddef.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2026, Mirocom Laboratories
+ * All rights reserved.
+ *
+ * The following sources are CONFIDENTIAL and PROPRIETARY
+ * property of Mirocom Laboratories. Unauthorized copying,
+ * use, distribution or modification of this file, in whole
+ * and in part, is strictly prohibited without the prior written
+ * consent from Mirocom Laboratories.
+ */
+
+#ifndef _STDINT_H_
+#define _STDINT_H_ 1
+
+#include <sys/types.h>
+
+typedef __ssize_t ssize_t;
+typedef __size_t  size_t;
+
+#endif  /* !_STDINT_H_ */

usr/src/head/stdint.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2026, Mirocom Laboratories
+ * All rights reserved.
+ *
+ * The following sources are CONFIDENTIAL and PROPRIETARY
+ * property of Mirocom Laboratories. Unauthorized copying,
+ * use, distribution or modification of this file, in whole
+ * and in part, is strictly prohibited without the prior written
+ * consent from Mirocom Laboratories.
+ */
+
+#ifndef _STDINT_H_
+#define _STDINT_H_ 1
+
+#include <sys/types.h>
+
+/* Unsigned types */
+typedef __uint8_t uint8_t;
+typedef __uint16_t uint16_t;
+typedef __uint32_t uint32_t;
+typedef __uint64_t uint64_t;
+
+/* Unsigned types */
+typedef __int8_t int8_t;
+typedef __int16_t int16_t;
+typedef __int32_t int32_t;
+typedef __int64_t int64_t;
+
+#endif  /* !_STDINT_H_ */

usr/src/head/string.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2026, Mirocom Laboratories
+ * All rights reserved.
+ *
+ * The following sources are CONFIDENTIAL and PROPRIETARY
+ * property of Mirocom Laboratories. Unauthorized copying,
+ * use, distribution or modification of this file, in whole
+ * and in part, is strictly prohibited without the prior written
+ * consent from Mirocom Laboratories.
+ */
+
+#ifndef _STRING_H_
+#define _STRING_H_ 1
+
+#include <sys/types.h>
+#include <stddef.h>
+
+/*
+ * Fill a buffer with 'n' bytes of 'c'
+ */
+void *memset(void *s, int c, size_t n);
+
+/*
+ * Compare 'n' bytes of two buffers 's1' and 's2'
+ */
+int memcmp(const void *s1, const void *s2, size_t n);
+
+/*
+ * Copy 'count' bytes of 'src' to 'dest'
+ */
+void *memcpy(void *dest, const void *src, size_t count);
+
+#endif  /* _STRING_H_ */