Changes in uspace/lib/posix/strings.c [a6d908c1:8ecef91] in mainline

File:

• uspace/lib/posix/strings.c (modified) (5 diffs)

uspace/lib/posix/strings.c

@@ -42 +42 @@
 #include "ctype.h"
 
+#include "libc/mem.h"
+
 /**
  *
@@ -49 +51 @@
 int posix_ffs(int i)
 {
-        // TODO
-        not_implemented();
+        if (i == 0) {
+                return 0;
+        }
+
+        int result = 0;
+
+        // XXX: assumes at most 32-bit int
+        if (!(i & 0xFFFF)) {
+                result |= 16;
+                i >>= 16;
+        }
+        if (!(i & 0xFF)) {
+                result |= 8;
+                i >>= 8;
+        }
+        if (!(i & 0xF)) {
+                result |= 4;
+                i >>= 4;
+        }
+        if (!(i & 0x3)) {
+                result |= 2;
+                i >>= 2;
+        }
+        if (!(i & 0x1)) {
+                result |= 1;
+        }
+
+        return result + 1;
 }
 
@@ -96 +124 @@
 int posix_bcmp(const void *mem1, const void *mem2, size_t n)
 {
-        // TODO
-        not_implemented();
+        return bcmp(mem1, mem2, n);
 }
 
@@ -108 +135 @@
 void posix_bcopy(const void *dest, void *src, size_t n)
 {
-        // TODO
-        not_implemented();
+        /* Note that memmove has different order of arguments. */
+        memmove(src, dest, n);
 }
 
@@ -119 +146 @@
 void posix_bzero(void *mem, size_t n)
 {
-        // TODO
-        not_implemented();
+        bzero(mem, n);
 }