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| author | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-08-02 08:43:31 +0200 |
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| committer | Jörg Frings-Fürst <debian@jff-webhosting.net> | 2014-08-02 08:43:31 +0200 |
| commit | daf17154bf13139d9375f48525d19d6aaba08155 (patch) | |
| tree | e3c08b6c49dc8a8e83f03327591310546675b43d /html/Xb2cpp.htm | |
Imported Upstream version 3.1.2upstream/3.1.2
Diffstat (limited to 'html/Xb2cpp.htm')
| -rwxr-xr-x | html/Xb2cpp.htm | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/html/Xb2cpp.htm b/html/Xb2cpp.htm new file mode 100755 index 0000000..aa9d532 --- /dev/null +++ b/html/Xb2cpp.htm @@ -0,0 +1,81 @@ +<HTML> +<HEAD> +<TITLE>Xbase to Xbase DBMS C++ Converter</TITLE> +</HEAD> +<BODY> + +<H1>Xbase to Xbase DBMS C++ Converter</H1> + +<H2>Program Xb2cpp.pl V0.1 26-11-98</P> +<H2>Author</H2> +<A HREF="mailto:kehl@informatik.tu-muenchen.de">Hubertus Kehl</A>, kehl@informatik.tu-muenchen.de, kehlh@hotmail.com +<BR>Please send suggestions, bug reports, patches, etc. one of these email +adresses. +<H2>Language</H2> +<P>Perl 5.0</P> +<H2>Purpose</H2> +<P>Convert Dbase, Clipper, FOXPRO Source Code to XBASE C++ Code for use with +<A HREF="http://xdb.sourceforge.net">XBASE DBMS Library</A></P> +<H2>Output</H2> +<P>.cpp File and .h File</P> +<H2>Arguments</H2> +<P>1st arg = filename</P> +<H2>Remarks</H2> +<P>The script tries to keep track of the databases used in different workareas. +But the flow through your program cannot be determined, so in some cases +you have to help the script a bit by giving additional info.</P> +<P>Three special comments have been designed to add this info:</P> +<PRE>* XB2CPP(SelectedArea) +or * XB2CPP(SelectedArea,Workarea1,Alias1,Wa2,Al2...) +or * XB2CPP(SelA,WA1,Al1[Total1, Active1],Wa2, Al2[Tot2,Act2])</PRE> +<P>e.g. * XB2CPP(3,3,ZP,2,PL) will inform the script for example at the beginning +of a PROCEDURE that a database with Alias ZP is opened in workarea 3 and +a database with alias PL is opened in workarea2 and when calling this procedure +always workarea 3 is selected.</P> +<P>The third alternative of this statement makes it possible to define +the number of open indices and which one is the active index, as given +by a previous SET INDEX TO or USE and SET ORDER TO statements. The script +cannot know, which procedures, statements have been executed before and +opened indices.... So * XB2CPP(2,2,ZP[2,1]) will inform the script about +an open database alias ZP in workarea 2 which is currently selected and +has two open indices where the first one is the active one.</P> +<H2>Hints</H2> + +<OL> +<LI>Always give an ALIAS in USE-Statements this is needed for generation +of the Database Classnames</LI> +<LI>Give the above described additional infos where necessary.</LI> +<LI>Use ALIASes in Expressions with database fields, this helps the script +in knowing where database references are.</LI> +<LI>Replace the XXX in PutXXXField or GetXXXField manually the script is +not able to determine variable or field types. The code for getting a Textfield +(GetField) must also be corrected. Xbase DBMS Syntax requires the buffer +as second parameter, the string will not be returned ! You may use a C++ +String wrapper for this job.</LI> +<LI>PROCEDURES that will operate on two different databases where some statements +are used for both cannot be converted The script needs to know everytime +on which database the statements are operating. Either duplicate such procedures, +(one for each database), or write a generic C++ routine with pointers to +databases.</LI> +<LI>Don't assume any compilable or even working C++ source code as output. +The ambigous DBASE language, which lacks type and variable definitions +is one reason for this. This script only will help you for about 10-30% +of the conversion. The rest (which remained uppercase) has to be done manually +:)</LI> +</OL> + +<H2>Copyright</H2> +<P>This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the Free +Software Foundation (version 2 of the License)</P> + +<P>This program is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details.</P> +<HR> +<ADDRESS> +<A HREF="mailto:kehl@informatik.tu-muenchen.de">Hubertus Kehl</A>,29-11-1998 +</ADDRESS> +</BODY> +</HTML> |