1 files changed, 102 insertions, 0 deletions
diff --git a/src/liblzma/check/check.h b/src/liblzma/check/check.h
new file mode 100644
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--- /dev/null
+++ b/src/liblzma/check/check.h
@@ -0,0 +1,102 @@
+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       check.h
+/// \brief      Prototypes for different check functions
+//
+//  This code has been put into the public domain.
+//
+//  This library is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef LZMA_CHECK_H
+#define LZMA_CHECK_H
+
+#include "common.h"
+
+
+typedef struct {
+	/// Internal state
+	uint32_t state[8];
+
+	/// Temporary 8-byte aligned buffer to hold incomplete chunk.
+	/// After lzma_check_finish(), the first 32 bytes will contain
+	/// the final digest in big endian byte order.
+	uint8_t buffer[64];
+
+	/// Size of the message excluding padding
+	uint64_t size;
+
+} lzma_sha256;
+
+
+/// \note       This is not in the public API because this structure will
+///             change in future.
+typedef union {
+	uint32_t crc32;
+	uint64_t crc64;
+	lzma_sha256 sha256;
+} lzma_check;
+
+
+#ifdef HAVE_SMALL
+extern uint32_t lzma_crc32_table[8][256];
+extern uint64_t lzma_crc64_table[4][256];
+#else
+extern const uint32_t lzma_crc32_table[8][256];
+extern const uint64_t lzma_crc64_table[4][256];
+#endif
+
+// Generic
+
+/// \brief      Initializes *check depending on type
+///
+/// \return     LZMA_OK on success. LZMA_UNSUPPORTED_CHECK if the type is not
+///             supported by the current version or build of liblzma.
+///             LZMA_PROG_ERROR if type > LZMA_CHECK_ID_MAX.
+///
+extern lzma_ret lzma_check_init(lzma_check *check, lzma_check_type type);
+
+/// \brief      Updates *check
+///
+extern void lzma_check_update(lzma_check *check, lzma_check_type type,
+		const uint8_t *buf, size_t size);
+
+/// \brief      Finishes *check
+///
+extern void lzma_check_finish(lzma_check *check, lzma_check_type type);
+
+
+/*
+/// \brief      Compare two checks
+///
+/// \return     false if the checks are identical; true if they differ.
+///
+extern bool lzma_check_compare(
+		lzma_check *check1, lzma_check *check2, lzma_check_type type);
+*/
+
+
+// CRC32
+
+extern void lzma_crc32_init(void);
+
+
+// CRC64
+
+extern void lzma_crc64_init(void);
+
+
+// SHA256
+
+extern void lzma_sha256_init(lzma_sha256 *sha256);
+
+extern void lzma_sha256_update(
+		const uint8_t *buf, size_t size, lzma_sha256 *sha256);
+
+extern void lzma_sha256_finish(lzma_sha256 *sha256);
+
+
+#endif