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Diffstat (limited to 'newlib/libc/string/strncmp.c')
-rw-r--r--newlib/libc/string/strncmp.c122
1 files changed, 0 insertions, 122 deletions
diff --git a/newlib/libc/string/strncmp.c b/newlib/libc/string/strncmp.c
deleted file mode 100644
index 9801b7d92..000000000
--- a/newlib/libc/string/strncmp.c
+++ /dev/null
@@ -1,122 +0,0 @@
-/*
-FUNCTION
- <<strncmp>>---character string compare
-
-INDEX
- strncmp
-
-ANSI_SYNOPSIS
- #include <string.h>
- int strncmp(const char *<[a]>, const char * <[b]>, size_t <[length]>);
-
-TRAD_SYNOPSIS
- #include <string.h>
- int strncmp(<[a]>, <[b]>, <[length]>)
- char *<[a]>;
- 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
-_DEFUN (strncmp, (s1, s2, n),
- _CONST char *s1 _AND
- _CONST char *s2 _AND
- 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 */
-}