init/fs: tmpfs driver with support for creating new files

2 files changed, 10 insertions, 0 deletions

diff --git a/src/shared/mem.c b/src/shared/mem.c
index 35b2f14..3075963 100644
--- a/src/shared/mem.c
+++ b/src/shared/mem.c
@@ -1,6 +1,15 @@
 #include <shared/mem.h>
 #include <stdint.h>
 
+void *memchr(const void *s, int c, size_t n) {
+	const unsigned char *s2 = s;
+	for (size_t i = 0; i < n; i++) {
+		if (s2[i] == (unsigned char)c)
+			return &s2[i];
+	}
+	return NULL;
+}
+
 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++) {
diff --git a/src/shared/mem.h b/src/shared/mem.h
index 7036381..8eb091f 100644
--- a/src/shared/mem.h
+++ b/src/shared/mem.h
@@ -1,6 +1,7 @@
 #pragma once
 #include <stddef.h>
 
+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);