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MySQL 5.1: mysql/src/5.1-dbg/storage/innobase/mach/mach0data.c File Reference

mysql/src/5.1-dbg/storage/innobase/mach/mach0data.c File Reference

#include "mach0data.h"

Include dependency graph for mach0data.c:


Functions
byte *	mach_parse_compressed (byte ptr, byte end_ptr, ulint *val)
byte *	mach_dulint_parse_compressed (byte ptr, byte end_ptr, dulint *val)

Function Documentation

byte* mach_dulint_parse_compressed	(	byte *	ptr,
		byte *	end_ptr,
		dulint *	val
	)

Definition at line 84 of file mach0data.c.

References mach_get_compressed_size(), mach_read_compressed(), mach_read_from_4(), NULL, ut_ad, and ut_dulint_create().

Referenced by mlog_parse_nbytes(), row_upd_parse_sys_vals(), and trx_undo_parse_page_header().

00086                               : pointer to end of the stored field, NULL if
00087                         not complete */
00088         byte*   ptr,    /* in: pointer to buffer from where to read */
00089         byte*   end_ptr,/* in: pointer to end of the buffer */
00090         dulint* val)    /* out: read value */
00091 {
00092         ulint   high;
00093         ulint   low;
00094         ulint   size;
00095 
00096         ut_ad(ptr && end_ptr && val);
00097 
00098         if (end_ptr < ptr + 5) {
00099 
00100                 return(NULL);
00101         }
00102 
00103         high = mach_read_compressed(ptr);
00104 
00105         size = mach_get_compressed_size(high);
00106 
00107         ptr += size;
00108 
00109         if (end_ptr < ptr + 4) {
00110 
00111                 return(NULL);
00112         }
00113 
00114         low = mach_read_from_4(ptr);
00115 
00116         *val = ut_dulint_create(high, low);
00117 
00118         return(ptr + 4);
00119 }

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byte* mach_parse_compressed	(	byte *	ptr,
		byte *	end_ptr,
		ulint *	val
	)

Definition at line 20 of file mach0data.c.

References flag, mach_read_from_1(), mach_read_from_2(), mach_read_from_3(), mach_read_from_4(), NULL, and ut_ad.

Referenced by mlog_parse_initial_log_record(), mlog_parse_nbytes(), page_cur_parse_insert_rec(), row_upd_index_parse(), row_upd_parse_sys_vals(), and trx_undo_parse_page_init().

00022                               : pointer to end of the stored field, NULL if
00023                         not complete */
00024         byte*   ptr,    /* in: pointer to buffer from where to read */
00025         byte*   end_ptr,/* in: pointer to end of the buffer */
00026         ulint*  val)    /* out: read value (< 2^32) */
00027 {
00028         ulint   flag;
00029 
00030         ut_ad(ptr && end_ptr && val);
00031 
00032         if (ptr >= end_ptr) {
00033 
00034                 return(NULL);
00035         }
00036 
00037         flag = mach_read_from_1(ptr);
00038 
00039         if (flag < 0x80UL) {
00040                 *val = flag;
00041                 return(ptr + 1);
00042 
00043         } else if (flag < 0xC0UL) {
00044                 if (end_ptr < ptr + 2) {
00045                         return(NULL);
00046                 }
00047 
00048                 *val = mach_read_from_2(ptr) & 0x7FFFUL;
00049 
00050                 return(ptr + 2);
00051 
00052         } else if (flag < 0xE0UL) {
00053                 if (end_ptr < ptr + 3) {
00054                         return(NULL);
00055                 }
00056 
00057                 *val = mach_read_from_3(ptr) & 0x3FFFFFUL;
00058 
00059                 return(ptr + 3);
00060         } else if (flag < 0xF0UL) {
00061                 if (end_ptr < ptr + 4) {
00062                         return(NULL);
00063                 }
00064 
00065                 *val = mach_read_from_4(ptr) & 0x1FFFFFFFUL;
00066 
00067                 return(ptr + 4);
00068         } else {
00069                 ut_ad(flag == 0xF0UL);
00070 
00071                 if (end_ptr < ptr + 5) {
00072                         return(NULL);
00073                 }
00074 
00075                 *val = mach_read_from_4(ptr + 1);
00076                 return(ptr + 5);
00077         }
00078 }

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mysql/src/5.1-dbg/storage/innobase/mach/mach0data.c File Reference

Functions

Function Documentation