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authorGuilhem Bichot <guilhem@mysql.com>2009-08-07 12:16:00 +0200
committerGuilhem Bichot <guilhem@mysql.com>2009-08-07 12:16:00 +0200
commit7ceb29ff17047a268d8e8670478f6e1669939904 (patch)
tree65b42f5cb11f29ea5b4414ff075ccafd48569ad6 /storage/innobase/mach
parent7fa1449eac29401b3d1f3fb4980149e9e562a705 (diff)
downloadmariadb-git-7ceb29ff17047a268d8e8670478f6e1669939904.tar.gz
Renamed storage/innodb_plugin to storage/innobase, so that 1) it's the same
layout as we always had in trees containing only the builtin 2) win\configure.js WITH_INNOBASE_STORAGE_ENGINE still works. storage/innobase/CMakeLists.txt: fix to new directory name (and like 5.1) storage/innobase/Makefile.am: fix to new directory name (and like 5.1) storage/innobase/handler/ha_innodb.cc: fix to new directory name (and like 5.1) storage/innobase/plug.in: fix to new directory name (and like 5.1)
Diffstat (limited to 'storage/innobase/mach')
-rw-r--r--storage/innobase/mach/mach0data.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/storage/innobase/mach/mach0data.c b/storage/innobase/mach/mach0data.c
new file mode 100644
index 00000000000..e030ce9aadf
--- /dev/null
+++ b/storage/innobase/mach/mach0data.c
@@ -0,0 +1,134 @@
+/*****************************************************************************
+
+Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
+
+This program is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free Software
+Foundation; version 2 of the License.
+
+This program 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with
+this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+Place, Suite 330, Boston, MA 02111-1307 USA
+
+*****************************************************************************/
+
+/******************************************************************//**
+@file mach/mach0data.c
+Utilities for converting data from the database file
+to the machine format.
+
+Created 11/28/1995 Heikki Tuuri
+***********************************************************************/
+
+#include "mach0data.h"
+
+#ifdef UNIV_NONINL
+#include "mach0data.ic"
+#endif
+
+/*********************************************************//**
+Reads a ulint in a compressed form if the log record fully contains it.
+@return pointer to end of the stored field, NULL if not complete */
+UNIV_INTERN
+byte*
+mach_parse_compressed(
+/*==================*/
+ byte* ptr, /*!< in: pointer to buffer from where to read */
+ byte* end_ptr,/*!< in: pointer to end of the buffer */
+ ulint* val) /*!< out: read value (< 2^32) */
+{
+ ulint flag;
+
+ ut_ad(ptr && end_ptr && val);
+
+ if (ptr >= end_ptr) {
+
+ return(NULL);
+ }
+
+ flag = mach_read_from_1(ptr);
+
+ if (flag < 0x80UL) {
+ *val = flag;
+ return(ptr + 1);
+
+ } else if (flag < 0xC0UL) {
+ if (end_ptr < ptr + 2) {
+ return(NULL);
+ }
+
+ *val = mach_read_from_2(ptr) & 0x7FFFUL;
+
+ return(ptr + 2);
+
+ } else if (flag < 0xE0UL) {
+ if (end_ptr < ptr + 3) {
+ return(NULL);
+ }
+
+ *val = mach_read_from_3(ptr) & 0x3FFFFFUL;
+
+ return(ptr + 3);
+ } else if (flag < 0xF0UL) {
+ if (end_ptr < ptr + 4) {
+ return(NULL);
+ }
+
+ *val = mach_read_from_4(ptr) & 0x1FFFFFFFUL;
+
+ return(ptr + 4);
+ } else {
+ ut_ad(flag == 0xF0UL);
+
+ if (end_ptr < ptr + 5) {
+ return(NULL);
+ }
+
+ *val = mach_read_from_4(ptr + 1);
+ return(ptr + 5);
+ }
+}
+
+/*********************************************************//**
+Reads a dulint in a compressed form if the log record fully contains it.
+@return pointer to end of the stored field, NULL if not complete */
+UNIV_INTERN
+byte*
+mach_dulint_parse_compressed(
+/*=========================*/
+ byte* ptr, /*!< in: pointer to buffer from where to read */
+ byte* end_ptr,/*!< in: pointer to end of the buffer */
+ dulint* val) /*!< out: read value */
+{
+ ulint high;
+ ulint low;
+ ulint size;
+
+ ut_ad(ptr && end_ptr && val);
+
+ if (end_ptr < ptr + 5) {
+
+ return(NULL);
+ }
+
+ high = mach_read_compressed(ptr);
+
+ size = mach_get_compressed_size(high);
+
+ ptr += size;
+
+ if (end_ptr < ptr + 4) {
+
+ return(NULL);
+ }
+
+ low = mach_read_from_4(ptr);
+
+ *val = ut_dulint_create(high, low);
+
+ return(ptr + 4);
+}