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Current Path: /usr/src/contrib/xz/src/liblzma/check

usr / src / contrib / xz / src / liblzma / check /

📁 ..
📄 check.c(2.84 KB)
📄 check.h(4.61 KB)
📄 crc32_fast.c(2.22 KB)
📄 crc32_small.c(1.02 KB)
📄 crc32_table.c(641 B)
📄 crc32_table_be.h(25.15 KB)
📄 crc32_table_le.h(25.15 KB)
📄 crc32_tablegen.c(2.19 KB)
📄 crc32_x86.S(7.08 KB)
📄 crc64_fast.c(1.6 KB)
📄 crc64_small.c(966 B)
📄 crc64_table.c(641 B)
📄 crc64_table_be.h(31.13 KB)
📄 crc64_table_le.h(31.13 KB)
📄 crc64_tablegen.c(1.7 KB)
📄 crc64_x86.S(6.63 KB)
📄 crc_macros.h(787 B)

Editing: crc32_small.c

///////////////////////////////////////////////////////////////////////////////
//
/// \file       crc32_small.c
/// \brief      CRC32 calculation (size-optimized)
//
//  Author:     Lasse Collin
//
//  This file has been put into the public domain.
//  You can do whatever you want with this file.
//
///////////////////////////////////////////////////////////////////////////////

#include "check.h"

uint32_t lzma_crc32_table[1][256];

static void
crc32_init(void)
{
	static const uint32_t poly32 = UINT32_C(0xEDB88320);

for (size_t b = 0; b < 256; ++b) {
		uint32_t r = b;
		for (size_t i = 0; i < 8; ++i) {
			if (r & 1)
				r = (r >> 1) ^ poly32;
			else
				r >>= 1;
		}

lzma_crc32_table[0][b] = r;
	}

return;
}

extern void
lzma_crc32_init(void)
{
	mythread_once(crc32_init);
	return;
}

extern LZMA_API(uint32_t)
lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc)
{
	lzma_crc32_init();

crc = ~crc;

while (size != 0) {
		crc = lzma_crc32_table[0][*buf++ ^ (crc & 0xFF)] ^ (crc >> 8);
		--size;
	}

return ~crc;
}

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Editing: crc32_small.c

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