reorganization: first steps

3 files changed, 47 insertions, 0 deletions

diff --git a/src/libk/include/shared/mem.h b/src/libk/include/shared/mem.h
new file mode 100644
index 0000000..3597edf
--- /dev/null
+++ b/src/libk/include/shared/mem.h
@@ -0,0 +1,18 @@
+#pragma once
+#include <stdarg.h>
+#include <stddef.h>
+
+/* note: (partially) tested in the userland tests */
+
+void *memchr(const void *s, int c, size_t n);
+int memcmp(const void *s1, const void *s2, size_t n);
+
+void *memcpy(void *dest, const void *src, size_t n);
+void *memmove(void *dest, const void *src, size_t n);
+void *memset(void *s, int c, size_t n);
+
+int strcmp(const char *s1, const char *s2);
+size_t strlen(const char *s);
+
+int snprintf(char *restrict str, size_t len, const char *restrict fmt, ...);
+int vsnprintf(char *restrict str, size_t len, const char *restrict fmt, va_list ap);
diff --git a/src/libk/include/shared/printf.h b/src/libk/include/shared/printf.h
new file mode 100644
index 0000000..45fd358
--- /dev/null
+++ b/src/libk/include/shared/printf.h
@@ -0,0 +1,6 @@
+#pragma once
+#include <stdarg.h>
+#include <stddef.h>
+
+int __printf_internal(const char *fmt, va_list argp,
+		void (*back)(void*, const char*, size_t), void *back_arg);
diff --git a/src/libk/include/shared/ring.h b/src/libk/include/shared/ring.h
new file mode 100644
index 0000000..dbaf331
--- /dev/null
+++ b/src/libk/include/shared/ring.h
@@ -0,0 +1,23 @@
+#pragma once
+#include <stddef.h>
+#include <stdint.h>
+
+typedef struct {
+	char *buf;
+	size_t capacity;
+	size_t _head, _tail;
+} ring_t;
+
+/** Returns amount of bytes stored in the buffer. */
+size_t	ring_used(ring_t*);
+/** Returns amount of space left in the buffer. */
+size_t	ring_avail(ring_t*);
+
+void	ring_put(ring_t*, const void*, size_t);
+void	ring_put1b(ring_t*, uint8_t);
+
+size_t	ring_get(ring_t*, void*, size_t);
+
+/** Consumes up to `len` bytes, and returns a pointer to the buffer where it's stored.
+ * Not thread-safe. */
+void*	ring_contig(ring_t*, size_t *len);