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-rw-r--r--contrib/binutils/libiberty/memcmp.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/contrib/binutils/libiberty/memcmp.c b/contrib/binutils/libiberty/memcmp.c
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+++ b/contrib/binutils/libiberty/memcmp.c
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+/* memcmp -- compare two memory regions.
+ This function is in the public domain. */
+
+/*
+
+@deftypefn Supplemental int memcmp (const void *@var{x}, const void *@var{y}, size_t @var{count})
+
+Compares the first @var{count} bytes of two areas of memory. Returns
+zero if they are the same, a value less than zero if @var{x} is
+lexically less than @var{y}, or a value greater than zero if @var{x}
+is lexically greater than @var{y}. Note that lexical order is determined
+as if comparing unsigned char arrays.
+
+@end deftypefn
+
+*/
+
+#include <ansidecl.h>
+#ifdef ANSI_PROTOTYPES
+#include <stddef.h>
+#else
+#define size_t unsigned long
+#endif
+
+int
+memcmp (str1, str2, count)
+ const PTR str1;
+ const PTR str2;
+ size_t count;
+{
+ register const unsigned char *s1 = (const unsigned char*)str1;
+ register const unsigned char *s2 = (const unsigned char*)str2;
+
+ while (count-- > 0)
+ {
+ if (*s1++ != *s2++)
+ return s1[-1] < s2[-1] ? -1 : 1;
+ }
+ return 0;
+}
+
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