Add memcpy() and strcmp() to LibC.

2 files changed, 19 insertions, 0 deletions

diff --git a/LibC/string.cpp b/LibC/string.cpp
index 06e28676e4..82877ec401 100644
--- a/LibC/string.cpp
+++ b/LibC/string.cpp
@@ -12,6 +12,23 @@ size_t strlen(const char* str)
     return len;
 }
 
+int strcmp(const char* s1, const char* s2)
+{
+    for (; *s1 == *s2; ++s1, ++s2) {
+        if (*s1 == 0)
+            return 0;
+    }
+    return *(const unsigned char*)s1 < *(const unsigned char*)s2 ? -1 : 1;
+}
+
+void memcpy(void* dest, const void* src, size_t n)
+{
+    auto* bdest = (unsigned char*)dest;
+    auto* bsrc = (const unsigned char*)src;
+    for (; n; --n)
+        *(bdest++) = *(bsrc++);
+}
+
 const char* strerror(int errnum)
 {
     switch (errnum) {
diff --git a/LibC/string.h b/LibC/string.h
index 15d0dbf1bf..32444fd90d 100644
--- a/LibC/string.h
+++ b/LibC/string.h
@@ -5,6 +5,8 @@
 extern "C" {
 
 size_t strlen(const char*);
+int strcmp(const char*, const char*);
+void memcpy(void*, const void*, size_t);
 const char* strerror(int errnum);
 
 }