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| author | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-03-25 17:53:14 +0100 |
|---|---|---|
| committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-03-25 17:53:14 +0100 |
| commit | f2902217b38cf2e16e851ae84d61247f8e828180 (patch) | |
| tree | 0156a6db6aa8b4d87bf041ece5cf5229c59fe9de /other-licenses/7zstub/src/C/7zCrc.c | |
| parent | 917a2c450f08ab4c934c9938319f10a1114272b4 (diff) | |
| download | UXP-f2902217b38cf2e16e851ae84d61247f8e828180.tar UXP-f2902217b38cf2e16e851ae84d61247f8e828180.tar.gz UXP-f2902217b38cf2e16e851ae84d61247f8e828180.tar.lz UXP-f2902217b38cf2e16e851ae84d61247f8e828180.tar.xz UXP-f2902217b38cf2e16e851ae84d61247f8e828180.zip | |
Update the 7z installer stub source to 18.05.
Tag #1022
Diffstat (limited to 'other-licenses/7zstub/src/C/7zCrc.c')
| -rw-r--r-- | other-licenses/7zstub/src/C/7zCrc.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/other-licenses/7zstub/src/C/7zCrc.c b/other-licenses/7zstub/src/C/7zCrc.c new file mode 100644 index 000000000..40ab75952 --- /dev/null +++ b/other-licenses/7zstub/src/C/7zCrc.c @@ -0,0 +1,128 @@ +/* 7zCrc.c -- CRC32 init
+2017-06-06 : Igor Pavlov : Public domain */
+
+#include "Precomp.h"
+
+#include "7zCrc.h"
+#include "CpuArch.h"
+
+#define kCrcPoly 0xEDB88320
+
+#ifdef MY_CPU_LE
+ #define CRC_NUM_TABLES 8
+#else
+ #define CRC_NUM_TABLES 9
+
+ #define CRC_UINT32_SWAP(v) ((v >> 24) | ((v >> 8) & 0xFF00) | ((v << 8) & 0xFF0000) | (v << 24))
+
+ UInt32 MY_FAST_CALL CrcUpdateT1_BeT4(UInt32 v, const void *data, size_t size, const UInt32 *table);
+ UInt32 MY_FAST_CALL CrcUpdateT1_BeT8(UInt32 v, const void *data, size_t size, const UInt32 *table);
+#endif
+
+#ifndef MY_CPU_BE
+ UInt32 MY_FAST_CALL CrcUpdateT4(UInt32 v, const void *data, size_t size, const UInt32 *table);
+ UInt32 MY_FAST_CALL CrcUpdateT8(UInt32 v, const void *data, size_t size, const UInt32 *table);
+#endif
+
+typedef UInt32 (MY_FAST_CALL *CRC_FUNC)(UInt32 v, const void *data, size_t size, const UInt32 *table);
+
+CRC_FUNC g_CrcUpdateT4;
+CRC_FUNC g_CrcUpdateT8;
+CRC_FUNC g_CrcUpdate;
+
+UInt32 g_CrcTable[256 * CRC_NUM_TABLES];
+
+UInt32 MY_FAST_CALL CrcUpdate(UInt32 v, const void *data, size_t size)
+{
+ return g_CrcUpdate(v, data, size, g_CrcTable);
+}
+
+UInt32 MY_FAST_CALL CrcCalc(const void *data, size_t size)
+{
+ return g_CrcUpdate(CRC_INIT_VAL, data, size, g_CrcTable) ^ CRC_INIT_VAL;
+}
+
+#define CRC_UPDATE_BYTE_2(crc, b) (table[((crc) ^ (b)) & 0xFF] ^ ((crc) >> 8))
+
+UInt32 MY_FAST_CALL CrcUpdateT1(UInt32 v, const void *data, size_t size, const UInt32 *table)
+{
+ const Byte *p = (const Byte *)data;
+ const Byte *pEnd = p + size;
+ for (; p != pEnd; p++)
+ v = CRC_UPDATE_BYTE_2(v, *p);
+ return v;
+}
+
+void MY_FAST_CALL CrcGenerateTable()
+{
+ UInt32 i;
+ for (i = 0; i < 256; i++)
+ {
+ UInt32 r = i;
+ unsigned j;
+ for (j = 0; j < 8; j++)
+ r = (r >> 1) ^ (kCrcPoly & ((UInt32)0 - (r & 1)));
+ g_CrcTable[i] = r;
+ }
+ for (i = 256; i < 256 * CRC_NUM_TABLES; i++)
+ {
+ UInt32 r = g_CrcTable[(size_t)i - 256];
+ g_CrcTable[i] = g_CrcTable[r & 0xFF] ^ (r >> 8);
+ }
+
+ #if CRC_NUM_TABLES < 4
+
+ g_CrcUpdate = CrcUpdateT1;
+
+ #else
+
+ #ifdef MY_CPU_LE
+
+ g_CrcUpdateT4 = CrcUpdateT4;
+ g_CrcUpdate = CrcUpdateT4;
+
+ #if CRC_NUM_TABLES >= 8
+ g_CrcUpdateT8 = CrcUpdateT8;
+
+ #ifdef MY_CPU_X86_OR_AMD64
+ if (!CPU_Is_InOrder())
+ #endif
+ g_CrcUpdate = CrcUpdateT8;
+ #endif
+
+ #else
+ {
+ #ifndef MY_CPU_BE
+ UInt32 k = 0x01020304;
+ const Byte *p = (const Byte *)&k;
+ if (p[0] == 4 && p[1] == 3)
+ {
+ g_CrcUpdateT4 = CrcUpdateT4;
+ g_CrcUpdate = CrcUpdateT4;
+ #if CRC_NUM_TABLES >= 8
+ g_CrcUpdateT8 = CrcUpdateT8;
+ g_CrcUpdate = CrcUpdateT8;
+ #endif
+ }
+ else if (p[0] != 1 || p[1] != 2)
+ g_CrcUpdate = CrcUpdateT1;
+ else
+ #endif
+ {
+ for (i = 256 * CRC_NUM_TABLES - 1; i >= 256; i--)
+ {
+ UInt32 x = g_CrcTable[(size_t)i - 256];
+ g_CrcTable[i] = CRC_UINT32_SWAP(x);
+ }
+ g_CrcUpdateT4 = CrcUpdateT1_BeT4;
+ g_CrcUpdate = CrcUpdateT1_BeT4;
+ #if CRC_NUM_TABLES >= 8
+ g_CrcUpdateT8 = CrcUpdateT1_BeT8;
+ g_CrcUpdate = CrcUpdateT1_BeT8;
+ #endif
+ }
+ }
+ #endif
+
+ #endif
+}
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