XrdOssCsiCrcUtils Class Reference

#include <XrdOssCsiCrcUtils.hh>

Collaboration diagram for XrdOssCsiCrcUtils:

Static Public Member Functions
static uint32_t	crc32c_combine (uint32_t crc1, uint32_t crc2, size_t len2)
static uint32_t	crc32c_extendwith_zero (uint32_t crc, size_t len)
static uint32_t	crc32c_split1 (uint32_t crctot, uint32_t crc2, size_t len2)
static uint32_t	crc32c_split2 (uint32_t crctot, uint32_t crc1, size_t len2)

Detailed Description

Definition at line 38 of file XrdOssCsiCrcUtils.hh.

Member Function Documentation

crc32c_combine()

static uint32_t XrdOssCsiCrcUtils::crc32c_combine ( uint32_t crc1, uint32_t crc2, size_t len2 )

inlinestatic

Definition at line 49 of file XrdOssCsiCrcUtils.hh.

   {
      if (len2==0)
         return crc1;
 
      assert(len2<=XrdSys::PageSize);
 
      const uint32_t c1 = XrdOucCRC::Calc32C(g_bz, len2, ~crc1);
      return ~c1^crc2;
   }

References XrdOucCRC::Calc32C(), and XrdSys::PageSize.

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crc32c_extendwith_zero()

static uint32_t XrdOssCsiCrcUtils::crc32c_extendwith_zero ( uint32_t crc, size_t len )

inlinestatic

Definition at line 107 of file XrdOssCsiCrcUtils.hh.

   {
      if (len==0)
         return crc;
 
      assert(len<=XrdSys::PageSize);
      return XrdOucCRC::Calc32C(g_bz, len, crc);
   }

References XrdOucCRC::Calc32C(), and XrdSys::PageSize.

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crc32c_split1()

static uint32_t XrdOssCsiCrcUtils::crc32c_split1 ( uint32_t crctot, uint32_t crc2, size_t len2 )

inlinestatic

Definition at line 69 of file XrdOssCsiCrcUtils.hh.

   {
      if (len2==0)
         return crctot;
 
      assert(len2<=XrdSys::PageSize);
      uint32_t crc = (crctot ^ crc2);
      for(size_t i=0;i<8*len2;i++) {
         crc = (crc<<1)^((crc&0x80000000) ? (CrcPoly << 1 | 0x1) : 0);
      }
      return crc;
   }

References XrdSys::PageSize.

crc32c_split2()

static uint32_t XrdOssCsiCrcUtils::crc32c_split2 ( uint32_t crctot, uint32_t crc1, size_t len2 )

inlinestatic

Definition at line 90 of file XrdOssCsiCrcUtils.hh.

   {
      if (len2==0)
         return 0;
 
      assert(len2<=XrdSys::PageSize);
      uint32_t c1 = XrdOucCRC::Calc32C(g_bz, len2, ~crc1);
      return ~c1^crctot;
   }

References XrdOucCRC::Calc32C(), and XrdSys::PageSize.

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

• XrdOssCsiCrcUtils.hh
• XrdOssCsiCrcUtils.cc