1 files changed, 97 insertions, 0 deletions
diff --git a/libc/include/string.h b/libc/include/string.h
new file mode 100644
index 0000000..2ec2a84
--- /dev/null
+++ b/libc/include/string.h
@@ -0,0 +1,97 @@
+#ifndef __STRING_H__
+#define __STRING_H__
+
+#include <stdint.h>
+#include <stddef.h>
+
+static inline void * memcpy(void * _s1, const void * _s2, size_t n) {
+    uint8_t * s1 = (uint8_t *) _s1;
+    const uint8_t * s2 = (uint8_t *) _s2;
+    size_t i;
+    
+    for (i = 0; i < n; i++)
+        *s1++ = *s2++;
+    
+    return _s1;
+}
+
+static inline int memcmp(const void * _s1, const void * _s2, size_t n) {
+    uint8_t * s1 = (uint8_t *) _s1;
+    const uint8_t * s2 = (uint8_t *) _s2;
+    size_t i;
+    
+    for (i = 0; i < n; i++, s1++, s2++) {
+        if (*s1 < *s2) {
+            return -1;
+        } else if (*s1 > *s2) {
+            return 1;
+        }
+    }
+    
+    return 0;
+}
+
+static inline void * memset(void * _s, int c, size_t n) {
+    uint8_t * s = (uint8_t *) _s;
+    size_t i;
+    
+    for (i = 0; i < n; i++)
+        *s++ = (uint8_t) c;
+    
+    return _s;
+}
+
+static inline char * strcat(char * s1, const char * s2) {
+    char * r = s1;
+    
+    while (*s1)
+        s1++;
+    
+    while (*s2)
+        *s1++ = *s2++;
+    
+    *s1 = 0;
+    
+    return r;
+}
+
+static inline char * strcpy(char * s1, const char * s2) {
+    char * r = s1;
+    
+    while ((*s1++ = *s2++));
+    
+    return r;
+}
+
+static inline char * strncpy(char * s1, const char * s2, size_t n) {
+    char * r = s1;
+    size_t i;
+    
+    for (i = 0; i < n; i++) {
+        if (*s2) {
+            *s1++ = *s2++;
+        } else {
+            *s1++ = 0;
+        }
+    }
+    
+    return r;
+}
+
+static inline const char * strchr(const char * s, char c) {
+    while (*s)
+        if (*s++ == c)
+            return s;
+    return NULL;
+}
+
+static inline size_t strlen(const char * s) {
+    size_t r = 0;
+    
+    while (*s++)
+        r++;
+    
+    return r;
+}
+
+#endif