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/* This file is part of the svarlang project and is published under the terms
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/* This file is part of the svarlang project and is published under the terms
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* of the MIT license.
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* of the MIT license.
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*
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*
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* Copyright (C) 2021-2023 Mateusz Viste
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* Copyright (C) 2021-2023 Mateusz Viste
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*
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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* Software is furnished to do so, subject to the following conditions:
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*
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*
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* The above copyright notice and this permission notice shall be included in
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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* all copies or substantial portions of the Software.
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*
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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* DEALINGS IN THE SOFTWARE.
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*/
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*/
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#include <stdlib.h> /* NULL */
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#include <stdio.h>
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#include "svarlang.h"
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#include "svarlang.h"
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int svarlang_autoload_exepath(const char *selfexe, const char *lang) {
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int svarlang_autoload_exepath(const char *selfexe, const char *lang) {
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unsigned short selflen;
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unsigned short selflen;
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unsigned long self_ext_backup;
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unsigned long self_ext_backup;
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unsigned long *self_ext_ptr;
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unsigned long *self_ext_ptr;
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int res;
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int res;
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/* validate selfexe: must be at least 5 bytes long and 4th char from end must
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/* validate selfexe: must be at least 5 bytes long and 4th char from end must
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* be a dot (like "a.exe" or "c:\b.com" or "..\..\test\run.exe") */
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* be a dot (like "a.exe" or "c:\b.com" or "..\..\test\run.exe") */
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if (selfexe == NULL) return(-200);
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if (!selfexe) return(-200);
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for (selflen = 0; selfexe[selflen] != 0; selflen++);
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for (selflen = 0; selfexe[selflen] != 0; selflen++);
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if ((selflen < 5) || (selfexe[selflen - 4] != '.')) return(-200);
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if ((selflen < 5) || (selfexe[selflen - 4] != '.')) return(-200);
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self_ext_ptr = (void *)(selfexe + selflen - 3); /* disregard CONST (I revert original content later, so the caller won't notice */
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self_ext_ptr = (void *)(selfexe + selflen - 3); /* disregard CONST (I revert original content later, so the caller won't notice */
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/* copy extension to buffer and replace it with "lng" */
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/* copy extension to buffer and replace it with "lng" */
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self_ext_backup = *self_ext_ptr;
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self_ext_backup = *self_ext_ptr;
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*self_ext_ptr = 0x00474E4Cl; /* "LNG\0" */
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*self_ext_ptr = 0x00474E4Cl; /* "LNG\0" */
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/* try loading it now */
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/* try loading it now */
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res = svarlang_load(selfexe, lang);
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res = svarlang_load(selfexe, lang);
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/* restore the original filename and quit */
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/* restore the original filename and quit */
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*self_ext_ptr = self_ext_backup;
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*self_ext_ptr = self_ext_backup;
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return(res);
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return(res);
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}
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}
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