supercop.ts

commit 86cbb50375aa5d382275f1130c9d429e28132d1d
parent 16f001200e862bc4c7a76ee686f7347ad98bb058
Author: finwo <finwo@pm.me>
Date:   Wed, 11 Sep 2019 16:31:23 +0200

More libc functions

Diffstat:
M
lib/c/malloc.c
 | 
5
+++++
A
lib/c/memcmp.c
 | 
16
++++++++++++++++
A
lib/c/memcpy.c
 | 
13
+++++++++++++
M
lib/c/memset.c
 | 
5
+++++
A
lib/c/null.c
 | 
3
+++

5 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/lib/c/malloc.c b/lib/c/malloc.c
@@ -1,6 +1,11 @@
+
 extern unsigned char __heap_base;
 
 unsigned int bump_pointer = &__heap_base;
+
+// TODO: realloc
+// TODO: free
+
 void* malloc(int n) {
   unsigned int r = bump_pointer;
   bump_pointer += n;
diff --git a/lib/c/memcmp.c b/lib/c/memcmp.c
@@ -0,0 +1,16 @@
+#ifndef __MEMCMP_C__
+#define __MEMCMP_C__
+
+int memcmp (const void *str1, const void *str2, int count) {
+  const unsigned char *s1 = str1;
+  const unsigned char *s2 = str2;
+
+  while (count-- > 0)
+    {
+      if (*s1++ != *s2++)
+        return s1[-1] < s2[-1] ? -1 : 1;
+    }
+  return 0;
+}
+
+#endif // __MEMCMP_C__
diff --git a/lib/c/memcpy.c b/lib/c/memcpy.c
@@ -0,0 +1,13 @@
+#ifndef __MEMCPY_C__
+#define __MEMCPY_C__
+
+void * memcpy (void *dest, const void *src, int len)
+{
+  char *d = dest;
+  const char *s = src;
+  while (len--)
+    *d++ = *s++;
+  return dest;
+}
+
+#endif // __MEMCPY_C__
diff --git a/lib/c/memset.c b/lib/c/memset.c
@@ -1,6 +1,11 @@
+#ifndef __MEMSET_C__
+#define __MEMSET_C__
+
 void * memset (void *dest, int val, int len) {
   unsigned char *ptr = dest;
   while (len-- > 0)
     *ptr++ = val;
   return dest;
 }
+
+#endif // __MEMSET_C__
diff --git a/lib/c/null.c b/lib/c/null.c
@@ -0,0 +1,3 @@
+#ifndef NULL
+#define NULL ((void*)0)
+#endif