Move all crc routines to libwsutil.

This way we can use the crc routines in wiretap.

svn path=/trunk/; revision=38800

1 files changed, 87 insertions, 0 deletions

diff --git a/wsutil/crc16-plain.h b/wsutil/crc16-plain.h
new file mode 100644
index 0000000000..f6593562af
--- /dev/null
+++ b/wsutil/crc16-plain.h
@@ -0,0 +1,87 @@
+/**
+ * \file crc16-plain.h
+ * Functions and types for CRC checks.
+ *
+ * Generated on Wed Mar 18 14:12:15 2009,
+ * by pycrc v0.7, http://www.tty1.net/pycrc/
+ * using the configuration:
+ *    Width        = 16
+ *    Poly         = 0x8005
+ *    XorIn        = 0x0000
+ *    ReflectIn    = True
+ *    XorOut       = 0x0000
+ *    ReflectOut   = True
+ *    Algorithm    = table-driven
+ *    Direct       = True
+ *
+ * Modified 2009-03-16 not to include <stdint.h> as our Win32 environment
+ * appears not to have it; we're using GLib types, instead.
+ *****************************************************************************/
+#ifndef __CRC____PLAIN_H__
+#define __CRC____PLAIN_H__
+
+#include "glib.h"
+#include <stdlib.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * The definition of the used algorithm.
+ *****************************************************************************/
+#define CRC_ALGO_TABLE_DRIVEN 1
+
+/**
+ * The type of the CRC values.
+ *
+ * This type must be big enough to contain at least 16 bits.
+ *****************************************************************************/
+typedef guint16 crc16_plain_t;
+
+/**
+ * Reflect all bits of a \a data word of \a data_len bytes.
+ *
+ * \param data         The data word to be reflected.
+ * \param data_len     The width of \a data expressed in number of bits.
+ * \return     The reflected data.
+ *****************************************************************************/
+long crc16_plain_reflect(long data, size_t data_len);
+
+/**
+ * Calculate the initial crc value.
+ *
+ * \return     The initial crc value.
+ *****************************************************************************/
+static inline crc16_plain_t crc16_plain_init(void)
+{
+    return 0x0000;
+}
+
+/**
+ * Update the crc value with new data.
+ *
+ * \param crc      The current crc value.
+ * \param data     Pointer to a buffer of \a data_len bytes.
+ * \param data_len Number of bytes in the \a data buffer.
+ * \return         The updated crc value.
+ *****************************************************************************/
+crc16_plain_t crc16_plain_update(crc16_plain_t crc, const unsigned char *data, size_t data_len);
+
+/**
+ * Calculate the final crc value.
+ *
+ * \param crc  The current crc value.
+ * \return     The final crc value.
+ *****************************************************************************/
+static inline crc16_plain_t crc16_plain_finalize(crc16_plain_t crc)
+{
+    return crc ^ 0x0000;
+}
+
+
+#ifdef __cplusplus
+}           /* closing brace for extern "C" */
+#endif
+
+#endif      /* __CRC____PLAIN_H__ */