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Docs/manual.texi: Added Innobase documentation configure.in: Incremented version include/my_base.h: Added option for Innobase myisam/mi_check.c: cleanup mysql-test/t/bdb.test: cleanup mysql-test/t/innobase.test: Extended with new tests from bdb.test mysql-test/t/merge.test: Added test of SHOW create mysys/my_init.c: Fix for UNIXWARE 7 scripts/mysql_install_db.sh: Always write how to start mysqld scripts/safe_mysqld.sh: Fixed type sql/ha_innobase.cc: Update to new version sql/ha_innobase.h: Update to new version sql/handler.h: Added 'update_table_comment()' and 'append_create_info()' sql/sql_delete.cc: Fixes for Innobase sql/sql_select.cc: Fixes for Innobase sql/sql_show.cc: Append create information (for MERGE tables) sql/sql_update.cc: Fixes for Innobase
119 lines
2.3 KiB
C
119 lines
2.3 KiB
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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(c) 1995 Innobase Oy
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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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byte*
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mach_parse_compressed(
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/*==================*/
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/* out: pointer to end of the stored field, NULL if
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not complete */
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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 < 0x80) {
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*val = flag;
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return(ptr + 1);
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} else if (flag < 0xC0) {
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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) & 0x7FFF;
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return(ptr + 2);
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} else if (flag < 0xE0) {
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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) & 0x3FFFFF;
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return(ptr + 3);
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} else if (flag < 0xF0) {
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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) & 0x1FFFFFFF;
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return(ptr + 4);
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} else {
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ut_ad(flag == 0xF0);
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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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byte*
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mach_dulint_parse_compressed(
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/*=========================*/
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/* out: pointer to end of the stored field, NULL if
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not complete */
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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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