mirror of
https://github.com/FirebirdSQL/firebird.git
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145 lines
3.2 KiB
C++
145 lines
3.2 KiB
C++
/*
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* PROGRAM: InterBase Access Method
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* MODULE: functions.c
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* DESCRIPTION: External entrypoint definitions
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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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#include "firebird.h"
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#include "../jrd/ib_stdio.h"
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#include <string.h>
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#include "../jrd/jrd.h" /* For MAX_PATH_LENGTH Bug #126614 */
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/* defined in common.h, which is included by ib_stdio.h: typedef int (*FPTR_INT)(); */
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extern "C" {
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typedef struct {
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char *fn_module;
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char *fn_entrypoint;
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FPTR_INT fn_function;
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} FN;
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FPTR_INT FUNCTIONS_entrypoint(char *, char *);
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static int test(long, char *);
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static DSC* ni(DSC*, DSC*);
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#pragma FB_COMPILER_MESSAGE("Fix! function pointer cast!")
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static FN isc_functions[] = {
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{"test_module", "test_function", (int (*)()) test},
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{"test_module", "ni", (int (*)()) ni},
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{"test_module", "ns", (int (*)()) ni},
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{"test_module", "nn", (int (*)()) ni},
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{0, 0, 0}
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};
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#ifdef SHLIB_DEFS
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#define strcmp (*_libfun_strcmp)
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#define sprintf (*_libfun_sprintf)
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extern int strcmp();
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extern int sprintf();
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#endif
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FPTR_INT FUNCTIONS_entrypoint(char *module, char *entrypoint)
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{
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/**************************************
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*
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* F U N C T I O N S _ 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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**************************************/
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FN *function;
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char *p, temp[MAX_PATH_LENGTH + 128], *ep; /* Bug #126614 Fix */
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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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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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for (function = isc_functions; function->fn_module; ++function)
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if (!strcmp(temp, function->fn_module)
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&& !strcmp(ep, function->fn_entrypoint))
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return function->fn_function;
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return 0;
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}
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static int test(long n, char *result)
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{
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/**************************************
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*
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* t e s t
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*
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**************************************
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*
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* Functional description
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* Sample extern function. Defined in database by:
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*
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* define function test module_name "test_module" entry_point "test_function"
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* long by value,
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* char [20] by reference return_argument;
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*
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**************************************/
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sprintf(result, "%d is a number", n);
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const char *end = result + 20;
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while (*result)
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result++;
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while (result < end)
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*result++ = ' ';
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return 0;
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}
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static DSC* ni(DSC* v, DSC* v2)
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{
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if (v)
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return v;
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else
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return v2;
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}
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} // extern "C"
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