Imported Upstream version 2.2.2upstream/2.2.2

1 files changed, 59 insertions, 0 deletions

diff --git a/crc.h b/crc.h
new file mode 100644
index 0000000..1f84831
--- /dev/null
+++ b/crc.h
@@ -0,0 +1,59 @@
+/*
+ * crc.h - CRC calculation routine
+ *
+ * Version 1.0
+ */
+
+/*
+ * Copyright (c) 1995, Edward B. Hamrick
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that
+ *
+ * (i)  the above copyright notice and the text in this "C" comment block
+ *      appear in all copies of the software and related documentation, and
+ *
+ * (ii) any modifications to this source file must be sent, via e-mail
+ *      to the copyright owner (currently hamrick@primenet.com) within 
+ *      30 days of such modification.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL EDWARD B. HAMRICK BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
+ * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/*
+ * This CRC algorithm is the same as that used in zip.  Normally it
+ * should be initialized with 0xffffffff, and the final CRC stored
+ * should be crc ^ 0xffffffff.
+ *
+ * It implements the polynomial:
+ *
+ * x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1
+ */
+
+#ifndef __CRC_H
+#define __CRC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+unsigned long CrcUpdate(          /* returns updated crc         */
+  unsigned long crc,              /* starting crc                */
+  unsigned char *buffer,          /* buffer to use to update crc */
+  long length                     /* length of buffer            */
+);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif