Add strcpy and strncpy

libc/Makefile

@@ -37,7 +37,9 @@ string/memcmp.o \
 string/memcpy.o \
 string/memmove.o \
 string/memset.o \
+string/strcpy.o \
 string/strlen.o \
+string/strncpy.o \
  
 HOSTEDOBJS=\
 $(ARCH_HOSTEDOBJS) \

libc/include/string.h

@@ -13,6 +13,9 @@ void* memmove(void*, const void*, size_t);
 void* memset(void*, int, size_t);
 size_t strlen(const char*);
 
+char* strcpy(char* __restrict, const char* __restrict);
+char* strncpy(char* __restrict, const char* __restrict, size_t);
+
 #ifdef __cplusplus
 }
 #endif

libc/string/strcpy.c

@@ -0,0 +1,10 @@
+#include <string.h>
+
+char* strcpy(char* restrict dest, const char* restrict src)
+{
+	size_t i;
+	for (i = 0; src[i]; i++)
+		dest[i] = src[i];
+	dest[i] = '\0';
+	return dest;
+}

libc/string/strncpy.c

@@ -0,0 +1,11 @@
+#include <string.h>
+
+char* strncpy(char* restrict dest, const char* restrict src, size_t n)
+{
+	size_t i;
+	for (i = 0; src[i] && i < n; i++)
+		dest[i] = src[i];
+	for (; i < n; i++)
+		dest[i] = '\0';
+	return dest;
+}