19990502 sourceware import

1 files changed, 60 insertions, 0 deletions

diff --git a/libiberty/memchr.c b/libiberty/memchr.c
new file mode 100644
index 0000000000..cce3003943
--- /dev/null
+++ b/libiberty/memchr.c
@@ -0,0 +1,60 @@
+/*
+FUNCTION
+	<<memchr>>---find character in memory
+
+INDEX
+	memchr
+
+ANSI_SYNOPSIS
+	#include <string.h>
+	void *memchr(const void *<[src]>, int <[c]>, size_t <[length]>);
+
+TRAD_SYNOPSIS
+	#include <string.h>
+	void *memchr(<[src]>, <[c]>, <[length]>)
+	void *<[src]>;
+	void *<[c]>;
+	size_t <[length]>;
+
+DESCRIPTION
+	This function searches memory starting at <<*<[src]>>> for the
+	character <[c]>.  The search only ends with the first
+	occurrence of <[c]>, or after <[length]> characters; in
+	particular, <<NULL>> does not terminate the search.
+
+RETURNS
+	If the character <[c]> is found within <[length]> characters
+	of <<*<[src]>>>, a pointer to the character is returned. If
+	<[c]> is not found, then <<NULL>> is returned. 	
+
+PORTABILITY
+<<memchr>>  requires no supporting OS subroutines.
+
+QUICKREF
+	memchr ansi pure
+
+*/
+
+#include <ansidecl.h>
+#ifdef __STDC__
+#include <stddef.h>
+#else
+#define size_t unsigned long
+#endif
+
+PTR
+memchr (src_void, c, length)
+     register const PTR src_void;
+     int c;
+     size_t length;
+{
+  const unsigned char *src = (const unsigned char *)src_void;
+  
+  while (--length >= 0)
+  {
+    if (*src == c)
+     return (PTR)src;
+    src++;
+  }
+  return NULL;
+}