SI::CRC32 Class Reference

#include <util.h>

List of all members.

Public Member Functions
	CRC32 (const char *d, int len, u_int32_t CRCvalue=0xFFFFFFFF)
bool	isValid ()
Static Public Member Functions
static bool	isValid (const char *d, int len, u_int32_t CRCvalue=0xFFFFFFFF)
Static Protected Member Functions
static u_int32_t	crc32 (const char *d, int len, u_int32_t CRCvalue)
Protected Attributes
const char *	data
int	length
u_int32_t	value
Static Protected Attributes
static u_int32_t	crc_table [256]

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Detailed Description

Definition at line 146 of file util.h.

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Constructor & Destructor Documentation

SI::CRC32::CRC32	(	const char *	d,
		int	len,
		u_int32_t	CRCvalue = 0xFFFFFFFF
	)

Definition at line 278 of file util.c.

References data, length, and value.

                                                       {
   data=d;
   length=len;
   value=CRCvalue;
}

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Member Function Documentation

u_int32_t SI::CRC32::crc32	(	const char *	d,
		int	len,
		u_int32_t	CRCvalue
	)		[static, protected]

Definition at line 267 of file util.c.

References crc_table, and i.

Referenced by isValid().

{
   register int i;
   const unsigned char *u=(unsigned char*)d; // Saves '& 0xff'

   for (i=0; i<len; i++)
      crc = (crc << 8) ^ crc_table[((crc >> 24) ^ *u++)];

   return crc;
}

bool SI::CRC32::isValid

(

)

[inline]

Definition at line 149 of file util.h.

References crc32(), length, and value.

{ return crc32(data, length, value) == 0; }

static bool SI::CRC32::isValid	(	const char *	d,
		int	len,
		u_int32_t	CRCvalue = 0xFFFFFFFF
	)		[inline, static]

Definition at line 150 of file util.h.

References crc32().

{ return crc32(d, len, CRCvalue) == 0; }

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Member Data Documentation

u_int32_t SI::CRC32::crc_table [static, protected]

Definition at line 152 of file util.h.

Referenced by crc32().

const char* SI::CRC32::data [protected]

Definition at line 155 of file util.h.

Referenced by CRC32().

int SI::CRC32::length [protected]

Definition at line 156 of file util.h.

Referenced by CRC32(), and isValid().

u_int32_t SI::CRC32::value [protected]

Definition at line 157 of file util.h.

Referenced by CRC32(), and isValid().

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The documentation for this class was generated from the following files:

• sc/include/libsi/util.h
• sc/libsi/util.c