Imported to git.

1 files changed, 128 insertions, 0 deletions

diff --git a/src/liblzma/api/lzma/check.h b/src/liblzma/api/lzma/check.h
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+/**
+ * \file        lzma/check.h
+ * \brief       Integrity checks
+ *
+ * \author      Copyright (C) 1999-2006 Igor Pavlov
+ * \author      Copyright (C) 2007 Lasse Collin
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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.  See the GNU
+ * Lesser General Public License for more details.
+ */
+
+#ifndef LZMA_H_INTERNAL
+#	error Never include this file directly. Use <lzma.h> instead.
+#endif
+
+
+/**
+ * \brief       Type of the Check
+ *
+ * The .lzma format supports multiple types of Checks that are calculated
+ * from the uncompressed data (unless it is empty; then it's calculated
+ * from Block Header).
+ */
+typedef enum {
+	LZMA_CHECK_NONE     = 0,
+		/**<
+		 * No Check is calculated.
+		 *
+		 * Size of the Check field: 0 bytes
+		 */
+
+	LZMA_CHECK_CRC32    = 1,
+		/**<
+		 * CRC32 using the polynomial from the IEEE 802.3 standard
+		 *
+		 * Size of the Check field: 4 bytes
+		 */
+
+	LZMA_CHECK_CRC64    = 3,
+		/**<
+		 * CRC64 using the polynomial from the ECMA-182 standard
+		 *
+		 * Size of the Check field: 8 bytes
+		 */
+
+	LZMA_CHECK_SHA256   = 5
+		/**<
+		 * SHA-256
+		 *
+		 * Size of the Check field: 32 bytes
+		 */
+} lzma_check_type;
+
+
+/**
+ * \brief       Maximum valid Check ID
+ *
+ * The .lzma file format specification specifies eight Check IDs (0-7). Some
+ * of them are only reserved i.e. no actual Check algorithm has been assigned.
+ * Still liblzma accepts any of these eight IDs for future compatibility
+ * when decoding files. If a valid but unsupported Check ID is detected,
+ * liblzma indicates a warning with LZMA_UNSUPPORTED_CHECK.
+ *
+ * FIXME bad desc
+ */
+#define LZMA_CHECK_ID_MAX 7
+
+
+/**
+ * \brief       Check IDs supported by this liblzma build
+ *
+ * If lzma_available_checks[n] is true, the Check ID n is supported by this
+ * liblzma build. You can assume that LZMA_CHECK_NONE and LZMA_CHECK_CRC32
+ * are always available.
+ */
+extern const lzma_bool lzma_available_checks[LZMA_CHECK_ID_MAX + 1];
+
+
+/**
+ * \brief       Size of the Check field with different Check IDs
+ *
+ * Although not all Check IDs have a check algorithm associated, the size of
+ * every Check is already frozen. This array contains the size (in bytes) of
+ * the Check field with specified Check ID. The values are taken from the
+ * section 2.2.2 of the .lzma file format specification:
+ * { 0, 4, 4, 8, 16, 32, 32, 64 }
+ */
+extern const uint32_t lzma_check_sizes[LZMA_CHECK_ID_MAX + 1];
+
+
+/**
+ * \brief       Calculate CRC32
+ *
+ * Calculates CRC32 using the polynomial from the IEEE 802.3 standard.
+ *
+ * \param       buf     Pointer to the input buffer
+ * \param       size    Size of the input buffer
+ * \param       crc     Previously returned CRC value. This is used to
+ *                      calculate the CRC of a big buffer in smaller chunks.
+ *                      Set to zero when there is no previous value.
+ *
+ * \return      Updated CRC value, which can be passed to this function
+ *              again to continue CRC calculation.
+ */
+extern uint32_t lzma_crc32(const uint8_t *buf, size_t size, uint32_t crc);
+
+
+/**
+ * \brief       Calculate CRC64
+ *
+ * Calculates CRC64 using the polynomial from the ECMA-182 standard.
+ *
+ * This function is used similarly to lzma_crc32(). See its documentation.
+ */
+extern uint64_t lzma_crc64(const uint8_t *buf, size_t size, uint64_t crc);
+
+
+/*
+ * SHA256 functions are currently not exported to public API.
+ * Contact the author if you think it should be.
+ */