2 files changed, 21 insertions, 1 deletions
diff --git a/src/common/include/string.h b/src/common/include/string.h
index 9608dd5..686382d 100644
--- a/src/common/include/string.h
+++ b/src/common/include/string.h
@@ -12,8 +12,10 @@ size_t strlen(const char *str);
 char *strchr(const char *str, char c);
 char *strrchr(const char *str, char c);
 char *strcpy(char *dest, const char *src);
+char *strncpy(char *dest, const char *src, size_t n);
 char *strcat(char *dest, const char *src);
 int strcmp(const char *s1, const char *s2);
+int strncmp(const char *s1, const char *s2, size_t n);
 
 char *strdup(const char* str);
 
diff --git a/src/common/string.c b/src/common/string.c
index dc25aee..b50356a 100644
--- a/src/common/string.c
+++ b/src/common/string.c
@@ -26,7 +26,15 @@ char *strrchr(const char *str, char c) {
 
 char *strcpy(char *dest, const char *src) {
 	memcpy(dest, src, strlen(src) + 1);
-	return (char*)src;
+	return (char*)dest;
+}
+
+char *strncpy(char *dest, const char *src, size_t n) {
+	size_t x = strlen(src + 1);
+	if (n < x) x = n;
+	memcpy(dest, src, x);
+	if (n > x) memset(dest + n, 0, n - x);
+	return (char*)dest;
 }
 
 char *strcat(char *dest, const char *src) {
@@ -49,6 +57,16 @@ int strcmp(const char *s1, const char *s2) {
 	return (*(unsigned char*)s1 - *(unsigned char*)s2);
 }
 
+int strcmp(const char *s1, const char *s2, size_t n) {
+	size_t i = 0;
+	while ((*s1) && (*s1 == *s2) && i != n) {
+		s1++;
+		s2++;
+		i++;
+	}
+	return (*(unsigned char*)s1 - *(unsigned char*)s2);
+}
+
 void *memcpy(void *vd, const void *vs, size_t count) {
 	uint8_t *dest = (uint8_t*)vd, *src = (uint8_t*)vs;
 	size_t f = count % 4, n = count / 4, i;