bt_conv.c File Reference

#include <sys/param.h>
#include <stdio.h>
#include "../include/db.h"
#include "btree.h"

Include dependency graph for bt_conv.c:

Go to the source code of this file.

Functions
void	__bt_pgin (void *t, pgno_t pg, void *pp)
void	__bt_pgout (void *t, pgno_t pg, void *pp)
static void mswap	__P ((PAGE *))
static void	mswap (PAGE *pg)

Function Documentation

__bt_pgin()

void __bt_pgin	(	void *	t,
		pgno_t	pg,
		void *	pp
	)

Definition at line 61 of file bt_conv.c.

References B_NEEDSWAP, F_ISSET, _page::flags, GETBINTERNAL, GETBLEAF, _page::linp, _page::lower, mswap(), NEXTINDEX, _page::nextpg, P_BIGDATA, P_BIGKEY, P_BINTERNAL, P_BLEAF, P_META, P_TYPE, _page::pgno, _page::prevpg, and _page::upper.

Referenced by __bt_open().

{
 PAGE *h;
 indx_t i, top;
 u_char flags;
 char *p;

 if (!F_ISSET(((BTREE *)t), B_NEEDSWAP))
 return;
 if (pg == P_META) {
 mswap(pp);
 return;
 }

 h = pp;
 M_32_SWAP(h->pgno);
 M_32_SWAP(h->prevpg);
 M_32_SWAP(h->nextpg);
 M_32_SWAP(h->flags);
 M_16_SWAP(h->lower);
 M_16_SWAP(h->upper);

 top = NEXTINDEX(h);
 if ((h->flags & P_TYPE) == P_BINTERNAL)
 for (i = 0; i < top; i++) {
 M_16_SWAP(h->linp[i]);
 p = (char *)GETBINTERNAL(h, i);
 P_32_SWAP(p);
 p += sizeof(u_int32_t);
 P_32_SWAP(p);
 p += sizeof(pgno_t);
 if (*(u_char *)p & P_BIGKEY) {
 p += sizeof(u_char);
 P_32_SWAP(p);
 p += sizeof(pgno_t);
 P_32_SWAP(p);
 }
 }
 else if ((h->flags & P_TYPE) == P_BLEAF)
 for (i = 0; i < top; i++) {
 M_16_SWAP(h->linp[i]);
 p = (char *)GETBLEAF(h, i);
 P_32_SWAP(p);
 p += sizeof(u_int32_t);
 P_32_SWAP(p);
 p += sizeof(u_int32_t);
 flags = *(u_char *)p;
 if (flags & (P_BIGKEY | P_BIGDATA)) {
 p += sizeof(u_char);
 if (flags & P_BIGKEY) {
 P_32_SWAP(p);
 p += sizeof(pgno_t);
 P_32_SWAP(p);
 }
 if (flags & P_BIGDATA) {
 p += sizeof(u_int32_t);
 P_32_SWAP(p);
 p += sizeof(pgno_t);
 P_32_SWAP(p);
 }
 }
 }
}

__bt_pgout()

void __bt_pgout	(	void *	t,
		pgno_t	pg,
		void *	pp
	)

Definition at line 129 of file bt_conv.c.

References B_NEEDSWAP, F_ISSET, _page::flags, GETBINTERNAL, GETBLEAF, _page::linp, _page::lower, mswap(), NEXTINDEX, _page::nextpg, P_BIGDATA, P_BIGKEY, P_BINTERNAL, P_BLEAF, P_META, P_TYPE, _page::pgno, _page::prevpg, and _page::upper.

Referenced by __bt_open().

{
 PAGE *h;
 indx_t i, top;
 u_char flags;
 char *p;

 if (!F_ISSET(((BTREE *)t), B_NEEDSWAP))
 return;
 if (pg == P_META) {
 mswap(pp);
 return;
 }

 h = pp;
 top = NEXTINDEX(h);
 if ((h->flags & P_TYPE) == P_BINTERNAL)
 for (i = 0; i < top; i++) {
 p = (char *)GETBINTERNAL(h, i);
 P_32_SWAP(p);
 p += sizeof(u_int32_t);
 P_32_SWAP(p);
 p += sizeof(pgno_t);
 if (*(u_char *)p & P_BIGKEY) {
 p += sizeof(u_char);
 P_32_SWAP(p);
 p += sizeof(pgno_t);
 P_32_SWAP(p);
 }
 M_16_SWAP(h->linp[i]);
 }
 else if ((h->flags & P_TYPE) == P_BLEAF)
 for (i = 0; i < top; i++) {
 p = (char *)GETBLEAF(h, i);
 P_32_SWAP(p);
 p += sizeof(u_int32_t);
 P_32_SWAP(p);
 p += sizeof(u_int32_t);
 flags = *(u_char *)p;
 if (flags & (P_BIGKEY | P_BIGDATA)) {
 p += sizeof(u_char);
 if (flags & P_BIGKEY) {
 P_32_SWAP(p);
 p += sizeof(pgno_t);
 P_32_SWAP(p);
 }
 if (flags & P_BIGDATA) {
 p += sizeof(u_int32_t);
 P_32_SWAP(p);
 p += sizeof(pgno_t);
 P_32_SWAP(p);
 }
 }
 M_16_SWAP(h->linp[i]);
 }

 M_32_SWAP(h->pgno);
 M_32_SWAP(h->prevpg);
 M_32_SWAP(h->nextpg);
 M_32_SWAP(h->flags);
 M_16_SWAP(h->lower);
 M_16_SWAP(h->upper);
}

__P()

static void mswap __P ( (PAGE *)  )

static

mswap()

static void mswap ( PAGE *  pg )

static

Definition at line 203 of file bt_conv.c.

Referenced by __bt_pgin(), and __bt_pgout().

{
 char *p;

 p = (char *)pg;
 P_32_SWAP(p); /* magic */
 p += sizeof(u_int32_t);
 P_32_SWAP(p); /* version */
 p += sizeof(u_int32_t);
 P_32_SWAP(p); /* psize */
 p += sizeof(u_int32_t);
 P_32_SWAP(p); /* free */
 p += sizeof(u_int32_t);
 P_32_SWAP(p); /* nrecs */
 p += sizeof(u_int32_t);
 P_32_SWAP(p); /* flags */
 p += sizeof(u_int32_t);
}