From acee9e74f6bd183b284af028b1f08aab666df9be Mon Sep 17 00:00:00 2001
From: "leleraffa97@hotmail.it" <leleraffa97@hotmail.it>
Date: Mon, 19 Jun 2017 15:06:25 +0200
Subject: libc memset, memcmp boot improved program allocation

---
 sw/z80/libc/include/string.h |  4 ++++
 sw/z80/libc/string.c         | 26 ++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

(limited to 'sw/z80/libc')

diff --git a/sw/z80/libc/include/string.h b/sw/z80/libc/include/string.h
index f224c87..9c002e3 100644
--- a/sw/z80/libc/include/string.h
+++ b/sw/z80/libc/include/string.h
@@ -3,6 +3,10 @@
 
 #include "types.h"
 
+void * memset(void *dest, const int8_t src, size_t n);
+
 void *memcpy(void *dest, const void *src, size_t n);
 
+int8_t memcmp(const void *s1, const void *s2, size_t n);
+
 #endif
diff --git a/sw/z80/libc/string.c b/sw/z80/libc/string.c
index fd6a7ff..9dd56cc 100644
--- a/sw/z80/libc/string.c
+++ b/sw/z80/libc/string.c
@@ -1,5 +1,15 @@
 #include "string.h"
 
+void * memset(void *dest, const int8_t src, size_t n) {
+
+    void *dp = dest;
+
+    while (n--)
+        *dp++ = src;
+
+    return dest;
+}
+
 void *memcpy(void *dest, void *src, size_t n)
 {
     char *dp = dest;
@@ -11,3 +21,19 @@ void *memcpy(void *dest, void *src, size_t n)
 
     return dest;
 }
+
+int8_t memcmp(const void *s1, const void *s2, size_t n) {
+
+    uint8_t u1, u2;
+
+    for ( ; n--; s1++, s2++) {
+
+        u1 = *s1;
+        u2 = *s2;
+
+        if (u1 != u2)
+            return u1 - u2;
+    }
+
+    return 0;
+}
\ No newline at end of file
-- 
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