kern: Implement SvcManageNamedPort

libraries/libmesosphere/source/libc/kern_libc_generic.c

@@ -421,6 +421,228 @@ memcmp (const void *m1,
 #endif /* not PREFER_SIZE_OVER_SPEED */
 }
 
+/*
+FUNCTION
+	<<strncpy>>---counted copy string
+INDEX
+	strncpy
+SYNOPSIS
+	#include <string.h>
+	char *strncpy(char *restrict <[dst]>, const char *restrict <[src]>,
+                      size_t <[length]>);
+DESCRIPTION
+	<<strncpy>> copies not more than <[length]> characters from the
+	the string pointed to by <[src]> (including the terminating
+	null character) to the array pointed to by <[dst]>.  If the
+	string pointed to by <[src]> is shorter than <[length]>
+	characters, null characters are appended to the destination
+	array until a total of <[length]> characters have been
+	written.
+RETURNS
+	This function returns the initial value of <[dst]>.
+PORTABILITY
+<<strncpy>> is ANSI C.
+<<strncpy>> requires no supporting OS subroutines.
+QUICKREF
+	strncpy ansi pure
+*/
+
+#include <string.h>
+#include <limits.h>
+
+/*SUPPRESS 560*/
+/*SUPPRESS 530*/
+
+/* Nonzero if either X or Y is not aligned on a "long" boundary.  */
+#define UNALIGNED(X, Y) \
+  (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1)))
+
+#if LONG_MAX == 2147483647L
+#define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
+#else
+#if LONG_MAX == 9223372036854775807L
+/* Nonzero if X (a long int) contains a NULL byte. */
+#define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080)
+#else
+#error long int is not a 32bit or 64bit type.
+#endif
+#endif
+
+#ifndef DETECTNULL
+#error long int is not a 32bit or 64bit byte
+#endif
+
+#undef TOO_SMALL
+#define TOO_SMALL(LEN) ((LEN) < sizeof (long))
+
+char *
+strncpy (char *__restrict dst0,
+	const char *__restrict src0,
+	size_t count)
+{
+#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
+  char *dscan;
+  const char *sscan;
+
+  dscan = dst0;
+  sscan = src0;
+  while (count > 0)
+    {
+      --count;
+      if ((*dscan++ = *sscan++) == '\0')
+	break;
+    }
+  while (count-- > 0)
+    *dscan++ = '\0';
+
+  return dst0;
+#else
+  char *dst = dst0;
+  const char *src = src0;
+  long *aligned_dst;
+  const long *aligned_src;
+
+  /* If SRC and DEST is aligned and count large enough, then copy words.  */
+  if (!UNALIGNED (src, dst) && !TOO_SMALL (count))
+    {
+      aligned_dst = (long*)dst;
+      aligned_src = (long*)src;
+
+      /* SRC and DEST are both "long int" aligned, try to do "long int"
+	 sized copies.  */
+      while (count >= sizeof (long int) && !DETECTNULL(*aligned_src))
+	{
+	  count -= sizeof (long int);
+	  *aligned_dst++ = *aligned_src++;
+	}
+
+      dst = (char*)aligned_dst;
+      src = (char*)aligned_src;
+    }
+
+  while (count > 0)
+    {
+      --count;
+      if ((*dst++ = *src++) == '\0')
+	break;
+    }
+
+  while (count-- > 0)
+    *dst++ = '\0';
+
+  return dst0;
+#endif /* not PREFER_SIZE_OVER_SPEED */
+}
+
+/*
+FUNCTION
+	<<strncmp>>---character string compare
+
+INDEX
+	strncmp
+SYNOPSIS
+	#include <string.h>
+	int strncmp(const char *<[a]>, const char * <[b]>, size_t <[length]>);
+DESCRIPTION
+	<<strncmp>> compares up to <[length]> characters
+	from the string at <[a]> to the string at <[b]>.
+RETURNS
+	If <<*<[a]>>> sorts lexicographically after <<*<[b]>>>,
+	<<strncmp>> returns a number greater than zero.  If the two
+	strings are equivalent, <<strncmp>> returns zero.  If <<*<[a]>>>
+	sorts lexicographically before <<*<[b]>>>, <<strncmp>> returns a
+	number less than zero.
+PORTABILITY
+<<strncmp>> is ANSI C.
+<<strncmp>> requires no supporting OS subroutines.
+QUICKREF
+	strncmp ansi pure
+*/
+
+#include <string.h>
+#include <limits.h>
+
+/* Nonzero if either X or Y is not aligned on a "long" boundary.  */
+#define UNALIGNED(X, Y) \
+  (((long)X & (sizeof (long) - 1)) | ((long)Y & (sizeof (long) - 1)))
+
+/* DETECTNULL returns nonzero if (long)X contains a NULL byte. */
+#if LONG_MAX == 2147483647L
+#define DETECTNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
+#else
+#if LONG_MAX == 9223372036854775807L
+#define DETECTNULL(X) (((X) - 0x0101010101010101) & ~(X) & 0x8080808080808080)
+#else
+#error long int is not a 32bit or 64bit type.
+#endif
+#endif
+
+#ifndef DETECTNULL
+#error long int is not a 32bit or 64bit byte
+#endif
+
+int
+strncmp (const char *s1,
+	const char *s2,
+	size_t n)
+{
+#if defined(PREFER_SIZE_OVER_SPEED) || defined(__OPTIMIZE_SIZE__)
+  if (n == 0)
+    return 0;
+
+  while (n-- != 0 && *s1 == *s2)
+    {
+      if (n == 0 || *s1 == '\0')
+	break;
+      s1++;
+      s2++;
+    }
+
+  return (*(unsigned char *) s1) - (*(unsigned char *) s2);
+#else
+  unsigned long *a1;
+  unsigned long *a2;
+
+  if (n == 0)
+    return 0;
+
+  /* If s1 or s2 are unaligned, then compare bytes. */
+  if (!UNALIGNED (s1, s2))
+    {
+      /* If s1 and s2 are word-aligned, compare them a word at a time. */
+      a1 = (unsigned long*)s1;
+      a2 = (unsigned long*)s2;
+      while (n >= sizeof (long) && *a1 == *a2)
+        {
+          n -= sizeof (long);
+
+          /* If we've run out of bytes or hit a null, return zero
+	     since we already know *a1 == *a2.  */
+          if (n == 0 || DETECTNULL (*a1))
+	    return 0;
+
+          a1++;
+          a2++;
+        }
+
+      /* A difference was detected in last few bytes of s1, so search bytewise */
+      s1 = (char*)a1;
+      s2 = (char*)a2;
+    }
+
+  while (n-- > 0 && *s1 == *s2)
+    {
+      /* If we've run out of bytes or hit a null, return zero
+	 since we already know *s1 == *s2.  */
+      if (n == 0 || *s1 == '\0')
+	return 0;
+      s1++;
+      s2++;
+    }
+  return (*(unsigned char *) s1) - (*(unsigned char *) s2);
+#endif /* not PREFER_SIZE_OVER_SPEED */
+}
+
 #ifdef __cplusplus
 } /* extern "C" */
 #endif