mirror of
https://github.com/FirebirdSQL/firebird.git
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120 lines
2.8 KiB
C++
120 lines
2.8 KiB
C++
/*
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* PROGRAM: InterBase Access Method
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* MODULE: builtin.cpp
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* DESCRIPTION: Entry points for builtin UDF library
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*
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*
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* The contents of this file are subject to the Interbase Public
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* License Version 1.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy
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* of the License at http://www.Inprise.com/IPL.html
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*
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* Software distributed under the License is distributed on an
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* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code was created by Inprise Corporation
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* and its predecessors. Portions created by Inprise Corporation are
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* Copyright (C) Inprise Corporation.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*
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*/
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#include "firebird.h"
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#include <string.h>
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#include "../jrd/flu.h"
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#include "../jrd/flu_proto.h"
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#include "../yvalve/gds_proto.h"
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struct FN
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{
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const TEXT* fn_module;
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const TEXT* fn_entrypoint;
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FPTR_INT fn_function;
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};
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static const FN isc_builtin_functions[] =
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{
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// Internal functions available for QA testing only
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/*
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"DEBUG_CRASH_TESTS", "TEST1", QATEST_entrypoint,
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and so shall it be, *NEVER* include this in a production build
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removed this ugly security hole
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FSG 18.Dez.2000
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*/
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{NULL, NULL, NULL} // End of list marker
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};
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FPTR_INT BUILTIN_entrypoint(const TEXT* module, const TEXT* entrypoint)
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{
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/**************************************
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*
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* B U I L T I N _ e n t r y p o i n t
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*
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**************************************
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*
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* Functional description
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* Lookup function in hardcoded table. The module and
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* entrypoint names are null terminated, but may contain
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* insignificant trailing blanks.
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*
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* Builtin functions may reside under the Firebird install
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* location. The module name may be prefixed with $FIREBIRD.
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*
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**************************************/
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// Strip off any preceeding $FIREBIRD path location from the requested module name.
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const TEXT* modname = module;
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TEXT temp[MAXPATHLEN];
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gds__prefix(temp, "");
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TEXT* p = temp;
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for (p = temp; *p; p++, modname++)
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{
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if (*p != *modname)
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break;
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}
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if (!*p)
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module = modname;
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// Strip off any trailing spaces from module name
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p = temp;
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while (*module && *module != ' ')
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*p++ = *module++;
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*p++ = 0;
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// Strip off any trailing spaces from entrypoint name
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const TEXT* ep = p;
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while (*entrypoint && *entrypoint != ' ')
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*p++ = *entrypoint++;
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*p = 0;
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// Scan the list for a matching (module, entrypoint) name
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for (const FN* function = isc_builtin_functions; function->fn_module; ++function)
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{
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if (!strcmp(temp, function->fn_module) && !strcmp(ep, function->fn_entrypoint))
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{
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return function->fn_function;
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}
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}
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return NULL;
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}
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