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1601bdc38a
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r5092 | marko | 2009-05-25 09:54:17 +0300 (Mon, 25 May 2009) | 1 line
branches/zip: Adjust some function comments after r5091.
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r5100 | marko | 2009-05-25 12:09:45 +0300 (Mon, 25 May 2009) | 1 line
branches/zip: Split some long lines that were introduced in r5091.
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r5101 | marko | 2009-05-25 12:42:47 +0300 (Mon, 25 May 2009) | 2 lines
branches/zip: Introduce the macro TEMP_INDEX_PREFIX_STR.
This is to avoid triggering an error in Doxygen.
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r5102 | marko | 2009-05-25 13:47:14 +0300 (Mon, 25 May 2009) | 1 line
branches/zip: Add missing file comments.
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r5103 | marko | 2009-05-25 13:52:29 +0300 (Mon, 25 May 2009) | 10 lines
branches/zip: Add @file comments, and convert decorative
/*********************************
comments to Doxygen /** style like this:
/*****************************//**
This conversion was performed by the following command:
perl -i -e 'while(<ARGV>){if (m|^/\*{30}\**$|) {
s|\*{4}$|//**| if ++$com>1; $_ .= "\@file $ARGV\n" if $com==2}
print; if(eof){$.=0;undef $com}}' */*[ch] include/univ.i
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r5104 | marko | 2009-05-25 14:39:07 +0300 (Mon, 25 May 2009) | 2 lines
branches/zip: Revert ut0auxconf_* to r5102,
that is, make Doxygen ignore these test programs.
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r5105 | marko | 2009-05-25 14:52:20 +0300 (Mon, 25 May 2009) | 2 lines
branches/zip: Enclose some #error checks inside #ifndef DOXYGEN
to prevent bogus Doxygen errors.
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r5106 | marko | 2009-05-25 16:09:24 +0300 (Mon, 25 May 2009) | 2 lines
branches/zip: Add some Doxygen comments, mainly to structs, typedefs,
macros and global variables. Many more to go.
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r5108 | marko | 2009-05-26 00:32:35 +0300 (Tue, 26 May 2009) | 2 lines
branches/zip: lexyy.c: Remove the inadvertently added @file directive.
There is nothing for Doxygen to see in this file, move along.
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r5125 | marko | 2009-05-26 16:28:49 +0300 (Tue, 26 May 2009) | 3 lines
branches/zip: Add some Doxygen comments for many structs, typedefs,
#defines and global variables. Many are still missing.
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r5134 | marko | 2009-05-27 09:08:43 +0300 (Wed, 27 May 2009) | 1 line
branches/zip: Add some Doxygen @return comments.
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r5139 | marko | 2009-05-27 10:01:40 +0300 (Wed, 27 May 2009) | 1 line
branches/zip: Add Doxyfile.
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r5143 | marko | 2009-05-27 10:57:25 +0300 (Wed, 27 May 2009) | 3 lines
branches/zip: buf0buf.h, Doxyfile: Fix the Doxygen translation.
@defgroup is for source code modules, not for field groups.
Tell Doxygen to expand the UT_LIST declarations.
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134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/*****************************************************************************
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Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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/******************************************************************//**
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@file mach/mach0data.c
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Utilities for converting data from the database file
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to the machine format.
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Created 11/28/1995 Heikki Tuuri
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***********************************************************************/
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#include "mach0data.h"
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#ifdef UNIV_NONINL
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#include "mach0data.ic"
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#endif
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/*********************************************************//**
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Reads a ulint in a compressed form if the log record fully contains it.
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@return pointer to end of the stored field, NULL if not complete */
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UNIV_INTERN
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byte*
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mach_parse_compressed(
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/*==================*/
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byte* ptr, /*!< in: pointer to buffer from where to read */
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byte* end_ptr,/*!< in: pointer to end of the buffer */
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ulint* val) /*!< out: read value (< 2^32) */
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{
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ulint flag;
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ut_ad(ptr && end_ptr && val);
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if (ptr >= end_ptr) {
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return(NULL);
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}
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flag = mach_read_from_1(ptr);
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if (flag < 0x80UL) {
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*val = flag;
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return(ptr + 1);
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} else if (flag < 0xC0UL) {
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if (end_ptr < ptr + 2) {
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return(NULL);
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}
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*val = mach_read_from_2(ptr) & 0x7FFFUL;
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return(ptr + 2);
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} else if (flag < 0xE0UL) {
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if (end_ptr < ptr + 3) {
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return(NULL);
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}
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*val = mach_read_from_3(ptr) & 0x3FFFFFUL;
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return(ptr + 3);
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} else if (flag < 0xF0UL) {
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if (end_ptr < ptr + 4) {
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return(NULL);
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}
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*val = mach_read_from_4(ptr) & 0x1FFFFFFFUL;
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return(ptr + 4);
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} else {
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ut_ad(flag == 0xF0UL);
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if (end_ptr < ptr + 5) {
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return(NULL);
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}
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*val = mach_read_from_4(ptr + 1);
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return(ptr + 5);
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}
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}
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/*********************************************************//**
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Reads a dulint in a compressed form if the log record fully contains it.
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@return pointer to end of the stored field, NULL if not complete */
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UNIV_INTERN
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byte*
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mach_dulint_parse_compressed(
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/*=========================*/
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byte* ptr, /*!< in: pointer to buffer from where to read */
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byte* end_ptr,/*!< in: pointer to end of the buffer */
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dulint* val) /*!< out: read value */
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{
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ulint high;
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ulint low;
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ulint size;
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ut_ad(ptr && end_ptr && val);
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if (end_ptr < ptr + 5) {
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return(NULL);
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}
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high = mach_read_compressed(ptr);
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size = mach_get_compressed_size(high);
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ptr += size;
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if (end_ptr < ptr + 4) {
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return(NULL);
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}
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low = mach_read_from_4(ptr);
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*val = ut_dulint_create(high, low);
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return(ptr + 4);
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}
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