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/*-------------------------------------------------------------------------
*
* pg_backup_null.c
*
* Implementation of an archive that is never saved; it is used by
* pg_dump to output a plain text SQL script instead of save
* a real archive.
*
* See the headers to pg_restore for more details.
*
* Copyright (c) 2000, Philip Warner
* Rights are granted to use this software in any way so long
* as this notice is not removed.
*
* The author is not responsible for loss or damages that may
* result from it's use.
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/bin/pg_dump/pg_backup_null.c,v 1.14 2003/12/08 16:39:05 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "pg_backup.h"
#include "pg_backup_archiver.h"
#include <unistd.h> /* for dup */
static size_t _WriteData(ArchiveHandle *AH, const void *data, size_t dLen);
static void _EndData(ArchiveHandle *AH, TocEntry *te);
static int _WriteByte(ArchiveHandle *AH, const int i);
static size_t _WriteBuf(ArchiveHandle *AH, const void *buf, size_t len);
static void _CloseArchive(ArchiveHandle *AH);
static void _PrintTocData(ArchiveHandle *AH, TocEntry *te, RestoreOptions *ropt);
/*
* Initializer
*/
void
InitArchiveFmt_Null(ArchiveHandle *AH)
{
/* Assuming static functions, this can be copied for each format. */
AH->WriteDataPtr = _WriteData;
AH->EndDataPtr = _EndData;
AH->WriteBytePtr = _WriteByte;
AH->WriteBufPtr = _WriteBuf;
AH->ClosePtr = _CloseArchive;
AH->PrintTocDataPtr = _PrintTocData;
/*
* Now prevent reading...
*/
if (AH->mode == archModeRead)
die_horribly(AH, NULL, "this format cannot be read\n");
}
/*
* - Start a new TOC entry
*/
/*------
* Called by dumper via archiver from within a data dump routine
* As at V1.3, this is only called for COPY FROM dfata, and BLOB data
*------
*/
static size_t
_WriteData(ArchiveHandle *AH, const void *data, size_t dLen)
{
/* Just send it to output */
ahwrite(data, 1, dLen, AH);
return dLen;
}
static void
_EndData(ArchiveHandle *AH, TocEntry *te)
{
ahprintf(AH, "\n\n");
}
/*------
* Called as part of a RestoreArchive call; for the NULL archive, this
* just sends the data for a given TOC entry to the output.
*------
*/
static void
_PrintTocData(ArchiveHandle *AH, TocEntry *te, RestoreOptions *ropt)
{
if (te->dataDumper)
{
AH->currToc = te;
(*te->dataDumper) ((Archive *) AH, te->dataDumperArg);
AH->currToc = NULL;
}
}
static int
_WriteByte(ArchiveHandle *AH, const int i)
{
/* Don't do anything */
return 0;
}
static size_t
_WriteBuf(ArchiveHandle *AH, const void *buf, size_t len)
{
/* Don't do anything */
return len;
}
static void
_CloseArchive(ArchiveHandle *AH)
{
/* Nothing to do */
}
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