Changeset e4f8c77 in mainline for uspace/lib/posix/strings.c

Timestamp:

2011-07-13T22:39:18Z (13 years ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e6910c8

Parents:

5974661 (diff), 8ecef91 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Merge libposix.

File:

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

uspace/lib/posix/strings.c

@@ -38 +38 @@
 #include "internal/common.h"
 #include "strings.h"
+
 #include "string.h"
 #include "ctype.h"
+
+#include "libc/mem.h"
 
 /**
@@ -48 +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;
 }
 
@@ -95 +124 @@
 int posix_bcmp(const void *mem1, const void *mem2, size_t n)
 {
-        // TODO
-        not_implemented();
+        return bcmp(mem1, mem2, n);
 }
 
@@ -107 +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);
 }
 
@@ -118 +146 @@
 void posix_bzero(void *mem, size_t n)
 {
-        // TODO
-        not_implemented();
+        bzero(mem, n);
 }