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Fix contrib/xml2 so regression test still works when it's built without libxslt.

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This involves modifying the module to have a stable ABI, that is, the
xslt_process() function still exists even without libxslt.  It throws a
runtime error if called, but doesn't prevent executing the CREATE FUNCTION
call.  This is a good thing anyway to simplify cross-version upgrades.
This commit is contained in:
Tom Lane
2010-03-01 18:07:59 +00:00
parent 8373490607
commit d6a6f8c6be
4 changed files with 135 additions and 13 deletions
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24
contrib/xml2/xslt_proc.c
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@ -1,5 +1,5 @@
/*
* $PostgreSQL: pgsql/contrib/xml2/xslt_proc.c,v 1.18 2010/03/01 05:16:35 tgl Exp $
* $PostgreSQL: pgsql/contrib/xml2/xslt_proc.c,v 1.19 2010/03/01 18:07:59 tgl Exp $
*
* XSLT processing functions (requiring libxslt)
*
@ -13,6 +13,8 @@
#include "miscadmin.h"
#include "utils/builtins.h"
#ifdef USE_LIBXSLT
/* libxml includes */
#include <libxml/xpath.h>
@ -26,11 +28,15 @@
#include <libxslt/transform.h>
#include <libxslt/xsltutils.h>
#endif /* USE_LIBXSLT */
/* externally accessible functions */
Datum xslt_process(PG_FUNCTION_ARGS);
#ifdef USE_LIBXSLT
/* declarations to come from xpath.c */
extern void elog_error(const char *explain, bool force);
extern void pgxml_parser_init(void);
@ -40,12 +46,16 @@ static void parse_params(const char **params, text *paramstr);
#define MAXPARAMS 20 /* must be even, see parse_params() */
#endif /* USE_LIBXSLT */
PG_FUNCTION_INFO_V1(xslt_process);
Datum
xslt_process(PG_FUNCTION_ARGS)
{
#ifdef USE_LIBXSLT
text *doct = PG_GETARG_TEXT_P(0);
text *ssheet = PG_GETARG_TEXT_P(1);
text *paramstr;
@ -123,8 +133,18 @@ xslt_process(PG_FUNCTION_ARGS)
PG_RETURN_NULL();
PG_RETURN_TEXT_P(cstring_to_text_with_len((char *) resstr, reslen));
#else /* !USE_LIBXSLT */
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("xslt_process() is not available without libxslt")));
PG_RETURN_NULL();
#endif /* USE_LIBXSLT */
}
#ifdef USE_LIBXSLT
static void
parse_params(const char **params, text *paramstr)
@ -173,3 +193,5 @@ parse_params(const char **params, text *paramstr)
params[i] = NULL;
}
#endif /* USE_LIBXSLT */