[PATCH v4 1/3] kvm-unit-tests: Add memcpy to lib/string.c

[Arthur Chunqi Li <yzt356@xxxxxxxxx>]

Add memcpy(void *dest, const void *src, size_t n) to lib/string.c.
This function acts the same as memcpy in libc.

Signed-off-by: Arthur Chunqi Li <yzt356@xxxxxxxxx>
---
 lib/libcflat.h |    1 +
 lib/string.c   |   12 ++++++++++++
 2 files changed, 13 insertions(+)

diff --git a/lib/libcflat.h b/lib/libcflat.h
index 0875bd9..fadc33d 100644
--- a/lib/libcflat.h
+++ b/lib/libcflat.h
@@ -50,6 +50,7 @@ extern int vsnprintf(char *buf, int size, const char *fmt, va_list va);
 extern void puts(const char *s);
 
 extern void *memset(void *s, int c, size_t n);
+extern void *memcpy(void *dest, const void *src, size_t n);
 
 extern long atol(const char *ptr);
 #define ARRAY_SIZE(_a)  (sizeof(_a)/sizeof((_a)[0]))
diff --git a/lib/string.c b/lib/string.c
index 9dc94a1..e798f86 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -42,6 +42,18 @@ void *memset(void *s, int c, size_t n)
     return s;
 }
 
+void *memcpy(void *dest, const void *src, size_t n)
+{
+    size_t i;
+    char *a = dest;
+    char *b = src;
+
+    for (i = 0; i < n; ++i)
+        a[i] = b[i];
+
+    return dest;
+}
+
 long atol(const char *ptr)
 {
     long acc = 0;
-- 
1.7.9.5

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