Add an unpatched version of xz, XZ Utils, to /trunk/deps/third_party

xz/src/liblzma/check/check.c

+///////////////////////////////////////////////////////////////////////////////
+//
+/// \file       check.c
+/// \brief      Single API to access different integrity checks
+//
+//  Author:     Lasse Collin
+//
+//  This file has been put into the public domain.
+//  You can do whatever you want with this file.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+#include "check.h"
+
+
+extern LZMA_API(lzma_bool)
+lzma_check_is_supported(lzma_check type)
+{
+        if ((unsigned int)(type) > LZMA_CHECK_ID_MAX)
+                return false;
+
+        static const lzma_bool available_checks[LZMA_CHECK_ID_MAX + 1] = {
+                true,   // LZMA_CHECK_NONE
+
+#ifdef HAVE_CHECK_CRC32
+                true,
+#else
+                false,
+#endif
+
+                false,  // Reserved
+                false,  // Reserved
+
+#ifdef HAVE_CHECK_CRC64
+                true,
+#else
+                false,
+#endif
+
+                false,  // Reserved
+                false,  // Reserved
+                false,  // Reserved
+                false,  // Reserved
+                false,  // Reserved
+
+#ifdef HAVE_CHECK_SHA256
+                true,
+#else
+                false,
+#endif
+
+                false,  // Reserved
+                false,  // Reserved
+                false,  // Reserved
+                false,  // Reserved
+                false,  // Reserved
+        };
+
+        return available_checks[(unsigned int)(type)];
+}
+
+
+extern LZMA_API(uint32_t)
+lzma_check_size(lzma_check type)
+{
+        if ((unsigned int)(type) > LZMA_CHECK_ID_MAX)
+                return UINT32_MAX;
+
+        // See file-format.txt section 2.1.1.2.
+        static const uint8_t check_sizes[LZMA_CHECK_ID_MAX + 1] = {
+                0,
+                4, 4, 4,
+                8, 8, 8,
+                16, 16, 16,
+                32, 32, 32,
+                64, 64, 64
+        };
+
+        return check_sizes[(unsigned int)(type)];
+}
+
+
+extern void
+lzma_check_init(lzma_check_state *check, lzma_check type)
+{
+        switch (type) {
+        case LZMA_CHECK_NONE:
+                break;
+
+#ifdef HAVE_CHECK_CRC32
+        case LZMA_CHECK_CRC32:
+                check->state.crc32 = 0;
+                break;
+#endif
+
+#ifdef HAVE_CHECK_CRC64
+        case LZMA_CHECK_CRC64:
+                check->state.crc64 = 0;
+                break;
+#endif
+
+#ifdef HAVE_CHECK_SHA256
+        case LZMA_CHECK_SHA256:
+                lzma_sha256_init(check);
+                break;
+#endif
+
+        default:
+                break;
+        }
+
+        return;
+}
+
+
+extern void
+lzma_check_update(lzma_check_state *check, lzma_check type,
+                const uint8_t *buf, size_t size)
+{
+        switch (type) {
+#ifdef HAVE_CHECK_CRC32
+        case LZMA_CHECK_CRC32:
+                check->state.crc32 = lzma_crc32(buf, size, check->state.crc32);
+                break;
+#endif
+
+#ifdef HAVE_CHECK_CRC64
+        case LZMA_CHECK_CRC64:
+                check->state.crc64 = lzma_crc64(buf, size, check->state.crc64);
+                break;
+#endif
+
+#ifdef HAVE_CHECK_SHA256
+        case LZMA_CHECK_SHA256:
+                lzma_sha256_update(buf, size, check);
+                break;
+#endif
+
+        default:
+                break;
+        }
+
+        return;
+}
+
+
+extern void
+lzma_check_finish(lzma_check_state *check, lzma_check type)
+{
+        switch (type) {
+#ifdef HAVE_CHECK_CRC32
+        case LZMA_CHECK_CRC32:
+                check->buffer.u32[0] = conv32le(check->state.crc32);
+                break;
+#endif
+
+#ifdef HAVE_CHECK_CRC64
+        case LZMA_CHECK_CRC64:
+                check->buffer.u64[0] = conv64le(check->state.crc64);
+                break;
+#endif
+
+#ifdef HAVE_CHECK_SHA256
+        case LZMA_CHECK_SHA256:
+                lzma_sha256_finish(check);
+                break;
+#endif
+
+        default:
+                break;
+        }
+
+        return;
+}