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Diffstat (limited to 'storage/connect/tabzip.cpp')
| -rw-r--r-- | storage/connect/tabzip.cpp | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/storage/connect/tabzip.cpp b/storage/connect/tabzip.cpp new file mode 100644 index 00000000000..11f414ee154 --- /dev/null +++ b/storage/connect/tabzip.cpp @@ -0,0 +1,230 @@ +/************* TabZip C++ Program Source Code File (.CPP) **************/ +/* PROGRAM NAME: TABZIP Version 1.0 */ +/* (C) Copyright to the author Olivier BERTRAND 2016 */ +/* This program are the TABZIP class DB execution routines. */ +/***********************************************************************/ + +/***********************************************************************/ +/* Include relevant sections of the MariaDB header file. */ +/***********************************************************************/ +#include <my_global.h> + +/***********************************************************************/ +/* Include application header files: */ +/* global.h is header containing all global declarations. */ +/* plgdbsem.h is header containing the DB application declarations. */ +/* (x)table.h is header containing the TDBASE declarations. */ +/* tabzip.h is header containing the TABZIP classes declarations. */ +/***********************************************************************/ +#include "global.h" +#include "plgdbsem.h" +#include "xtable.h" +#include "filamtxt.h" +#include "filamzip.h" +#include "resource.h" // for IDS_COLUMNS +#include "tabdos.h" +#include "tabzip.h" + +/* -------------------------- Class ZIPDEF --------------------------- */ + +/************************************************************************/ +/* DefineAM: define specific AM block values. */ +/************************************************************************/ +bool ZIPDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff) +{ +//target = GetStringCatInfo(g, "Target", NULL); + return DOSDEF::DefineAM(g, "ZIP", poff); +} // end of DefineAM + +/***********************************************************************/ +/* GetTable: makes a new Table Description Block. */ +/***********************************************************************/ +PTDB ZIPDEF::GetTable(PGLOBAL g, MODE m) +{ + return new(g) TDBZIP(this); +} // end of GetTable + +/* ------------------------------------------------------------------- */ + +/***********************************************************************/ +/* Implementation of the TDBZIP class. */ +/***********************************************************************/ +TDBZIP::TDBZIP(PZIPDEF tdp) : TDBASE(tdp) +{ + zipfile = NULL; + zfn = tdp->Fn; +//target = tdp->target; + nexterr = UNZ_OK; +} // end of TDBZIP standard constructor + +/***********************************************************************/ +/* Allocate ZIP column description block. */ +/***********************************************************************/ +PCOL TDBZIP::MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n) +{ + return new(g) ZIPCOL(cdp, this, cprec, n); +} // end of MakeCol + +/***********************************************************************/ +/* open a zip file. */ +/* param: filename path and the filename of the zip file to open. */ +/* return: true if open, false otherwise. */ +/***********************************************************************/ +bool TDBZIP::open(PGLOBAL g, const char *filename) +{ + if (!zipfile && !(zipfile = unzOpen64(filename))) + sprintf(g->Message, "Zipfile open error"); + + return (zipfile == NULL); +} // end of open + +/***********************************************************************/ +/* Close the zip file. */ +/***********************************************************************/ +void TDBZIP::close() +{ + if (zipfile) { + unzClose(zipfile); + zipfile = NULL; + } // endif zipfile + +} // end of close + +/***********************************************************************/ +/* ZIP Cardinality: returns table size in number of rows. */ +/***********************************************************************/ +int TDBZIP::Cardinality(PGLOBAL g) +{ + if (!g) + return 1; + else if (Cardinal < 0) { + if (!open(g, zfn)) { + unz_global_info64 ginfo; + int err = unzGetGlobalInfo64(zipfile, &ginfo); + + Cardinal = (err == UNZ_OK) ? ginfo.number_entry : 0; + } else + Cardinal = 0; + + } // endif Cardinal + + return Cardinal; +} // end of Cardinality + +/***********************************************************************/ +/* ZIP GetMaxSize: returns file size estimate in number of lines. */ +/***********************************************************************/ +int TDBZIP::GetMaxSize(PGLOBAL g) +{ + if (MaxSize < 0) + MaxSize = Cardinality(g); + + return MaxSize; +} // end of GetMaxSize + +/***********************************************************************/ +/* ZIP Access Method opening routine. */ +/***********************************************************************/ +bool TDBZIP::OpenDB(PGLOBAL g) +{ + if (Use == USE_OPEN) + // Table already open + return false; + + Use = USE_OPEN; // To be clean + return open(g, zfn); +} // end of OpenDB + +/***********************************************************************/ +/* ReadDB: Data Base read routine for ZIP access method. */ +/***********************************************************************/ +int TDBZIP::ReadDB(PGLOBAL g) +{ + if (nexterr == UNZ_END_OF_LIST_OF_FILE) + return RC_EF; + else if (nexterr != UNZ_OK) { + sprintf(g->Message, "unzGoToNextFile error %d", nexterr); + return RC_FX; + } // endif nexterr + + int err = unzGetCurrentFileInfo64(zipfile, &finfo, fn, + sizeof(fn), NULL, 0, NULL, 0); + + if (err != UNZ_OK) { + sprintf(g->Message, "unzGetCurrentFileInfo64 error %d", err); + return RC_FX; + } // endif err + + nexterr = unzGoToNextFile(zipfile); + return RC_OK; +} // end of ReadDB + +/***********************************************************************/ +/* WriteDB: Data Base write routine for ZIP access method. */ +/***********************************************************************/ +int TDBZIP::WriteDB(PGLOBAL g) +{ + strcpy(g->Message, "ZIP tables are read only"); + return RC_FX; +} // end of WriteDB + +/***********************************************************************/ +/* Data Base delete line routine for ZIP access method. */ +/***********************************************************************/ +int TDBZIP::DeleteDB(PGLOBAL g, int irc) +{ + strcpy(g->Message, "Delete not enabled for ZIP tables"); + return RC_FX; +} // end of DeleteDB + +/***********************************************************************/ +/* Data Base close routine for ZIP access method. */ +/***********************************************************************/ +void TDBZIP::CloseDB(PGLOBAL g) +{ + close(); + Use = USE_READY; // Just to be clean +} // end of CloseDB + +/* ---------------------------- ZIPCOL ------------------------------- */ + +/***********************************************************************/ +/* ZIPCOL public constructor. */ +/***********************************************************************/ +ZIPCOL::ZIPCOL(PCOLDEF cdp, PTDB tdbp, PCOL cprec, int i, PSZ am) + : COLBLK(cdp, tdbp, i) +{ + if (cprec) { + Next = cprec->GetNext(); + cprec->SetNext(this); + } else { + Next = tdbp->GetColumns(); + tdbp->SetColumns(this); + } // endif cprec + + Tdbz = (TDBZIP*)tdbp; + flag = cdp->GetOffset(); +} // end of ZIPCOL constructor + +/***********************************************************************/ +/* ReadColumn: */ +/***********************************************************************/ +void ZIPCOL::ReadColumn(PGLOBAL g) +{ + switch (flag) { + case 1: + Value->SetValue(Tdbz->finfo.compressed_size); + break; + case 2: + Value->SetValue(Tdbz->finfo.uncompressed_size); + break; + case 3: + Value->SetValue((int)Tdbz->finfo.compression_method); + break; + default: + Value->SetValue_psz((PSZ)Tdbz->fn); + } // endswitch flag + +} // end of ReadColumn + +/* -------------------------- End of tabzip -------------------------- */ |