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postgresql/contrib/isn/isn.h

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Add contrib/isn module for ISBN/ISSN/EAN13/etc product numbers, and remove the old isbn_issn module which is about to be obsoleted by EAN13. contrib/isn is by Germán Méndez Bravo. Our thanks to Garrett A. Wollman for having written the original isbn_issn module.
2006-09-09 12:07:52 +08:00
/*-------------------------------------------------------------------------
*
* isn.h
* PostgreSQL type definitions for ISNs (ISBN, ISMN, ISSN, EAN13, UPC)
*
* Copyright (c) 2004-2006, Germ<EFBFBD>n M<EFBFBD>ndez Bravo (Kronuz)
Update CVS HEAD for 2007 copyright. Back branches are typically not back-stamped for this.
2007-01-06 06:20:05 +08:00
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
Add contrib/isn module for ISBN/ISSN/EAN13/etc product numbers, and remove the old isbn_issn module which is about to be obsoleted by EAN13. contrib/isn is by Germán Méndez Bravo. Our thanks to Garrett A. Wollman for having written the original isbn_issn module.
2006-09-09 12:07:52 +08:00
*
* IDENTIFICATION
Downgrade implicit casts to text to be assignment-only, except for the ones from the other string-category types; this eliminates a lot of surprising interpretations that the parser could formerly make when there was no directly applicable operator. Create a general mechanism that supports casts to and from the standard string types (text,varchar,bpchar) for *every* datatype, by invoking the datatype's I/O functions. These new casts are assignment-only in the to-string direction, explicit-only in the other, and therefore should create no surprising behavior. Remove a bunch of thereby-obsoleted datatype-specific casting functions. The "general mechanism" is a new expression node type CoerceViaIO that can actually convert between *any* two datatypes if their external text representations are compatible. This is more general than needed for the immediate feature, but might be useful in plpgsql or other places in future. This commit does nothing about the issue that applying the concatenation operator || to non-text types will now fail, often with strange error messages due to misinterpreting the operator as array concatenation. Since it often (not always) worked before, we should either make it succeed or at least give a more user-friendly error; but details are still under debate. Peter Eisentraut and Tom Lane
2007-06-06 05:31:09 +08:00
* $PostgreSQL: pgsql/contrib/isn/isn.h,v 1.4 2007/06/05 21:31:03 tgl Exp $
Add contrib/isn module for ISBN/ISSN/EAN13/etc product numbers, and remove the old isbn_issn module which is about to be obsoleted by EAN13. contrib/isn is by Germán Méndez Bravo. Our thanks to Garrett A. Wollman for having written the original isbn_issn module.
2006-09-09 12:07:52 +08:00
*
*-------------------------------------------------------------------------
*/
#ifndef ISN_H
#define ISN_H
#include "fmgr.h"
#undef ISN_DEBUG
#define ISN_WEAK_MODE
/*
* uint64 is the internal storage format for ISNs.
*/
typedef uint64 ean13;
#define EAN13_FORMAT UINT64_FORMAT
contrib/isn updates from Jeremy Kronuz.
2006-09-11 04:45:17 +08:00
#define PG_GETARG_EAN13(n) PG_GETARG_INT64((int64)n)
#define PG_RETURN_EAN13(x) PG_RETURN_INT64((int64)x)
Add contrib/isn module for ISBN/ISSN/EAN13/etc product numbers, and remove the old isbn_issn module which is about to be obsoleted by EAN13. contrib/isn is by Germán Méndez Bravo. Our thanks to Garrett A. Wollman for having written the original isbn_issn module.
2006-09-09 12:07:52 +08:00
extern Datum isn_out(PG_FUNCTION_ARGS);
extern Datum ean13_out(PG_FUNCTION_ARGS);
extern Datum ean13_in(PG_FUNCTION_ARGS);
extern Datum isbn_in(PG_FUNCTION_ARGS);
extern Datum ismn_in(PG_FUNCTION_ARGS);
extern Datum issn_in(PG_FUNCTION_ARGS);
extern Datum upc_in(PG_FUNCTION_ARGS);
contrib/isn updates from Jeremy Kronuz.
2006-09-11 04:45:17 +08:00
extern Datum isbn_cast_from_ean13(PG_FUNCTION_ARGS);
extern Datum ismn_cast_from_ean13(PG_FUNCTION_ARGS);
extern Datum issn_cast_from_ean13(PG_FUNCTION_ARGS);
extern Datum upc_cast_from_ean13(PG_FUNCTION_ARGS);
Add contrib/isn module for ISBN/ISSN/EAN13/etc product numbers, and remove the old isbn_issn module which is about to be obsoleted by EAN13. contrib/isn is by Germán Méndez Bravo. Our thanks to Garrett A. Wollman for having written the original isbn_issn module.
2006-09-09 12:07:52 +08:00
extern Datum is_valid(PG_FUNCTION_ARGS);
extern Datum make_valid(PG_FUNCTION_ARGS);
extern Datum accept_weak_input(PG_FUNCTION_ARGS);
extern Datum weak_input_status(PG_FUNCTION_ARGS);
extern void initialize(void);
#endif /* ISN_H */
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