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/* This file is part of the svarlang project and is published under the terms
* of the MIT license.
*
* Copyright (C) 2021-2022 Mateusz Viste
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include <stdio.h> /* FILE */
#include <stdlib.h> /* NULL */
#include <string.h> /* memcmp(), strcpy() */
#include "svarlang.h"
/* supplied through DEFLANG.C */
extern char svarlang_mem[];
extern const unsigned short svarlang_memsz;
const char *svarlang_strid(unsigned short id) {
const char *ptr = svarlang_mem;
/* find the string id in langblock memory */
for (;;) {
if (((unsigned short *)ptr)[0] == id) return(ptr + 4);
if (((unsigned short *)ptr)[1] == 0) return(ptr + 2); /* end of strings - return an empty string */
ptr += ((unsigned short *)ptr)[1] + 4;
}
}
int svarlang_load(const char *progname, const char *lang, const char *nlspath) {
unsigned short langid;
FILE *fd;
char buff[128];
unsigned short buff16[2];
unsigned short i;
if (lang == NULL) return(-1);
if (nlspath == NULL) nlspath = ""; /* nlspath can be NULL, treat is as empty */
langid = *((unsigned short *)lang);
langid &= 0xDFDF; /* make sure lang is upcase */
TRYNEXTPATH:
/* skip any leading ';' separators */
while (*nlspath == ';') nlspath++;
/* copy nlspath to buff and remember len */
for (i = 0; (nlspath[i] != 0) && (nlspath[i] != ';'); i++) buff[i] = nlspath[i];
nlspath += i;
/* add a trailing backslash if there is none (non-empty paths empty) */
if ((i > 0) && (buff[i - 1] != '\\')) buff[i++] = '\\';
strcpy(buff + i, progname);
strcat(buff + i, ".lng");
fd = fopen(buff, "rb");
if (fd == NULL) { /* failed to open file - either abort or try next path */
if (*nlspath == 0) return(-2);
goto TRYNEXTPATH;
}
/* read hdr, should be "SvL\33" */
if ((fread(buff, 1, 4, fd) != 4) || (memcmp(buff, "SvL\33", 4) != 0)) {
fclose(fd);
return(-3);
}
/* read next lang id in file */
while (fread(buff16, 1, 4, fd) == 4) {
/* is it the lang I am looking for? */
if (buff16[0] != langid) { /* skip to next lang */
fseek(fd, buff16[1], SEEK_CUR);
continue;
}
/* found - but do I have enough memory space? */
if (buff16[1] >= svarlang_memsz) {
fclose(fd);
return(-4);
}
/* load strings */
if (fread(svarlang_mem, 1, buff16[1], fd) != buff16[1]) break;
fclose(fd);
return(0);
}
fclose(fd);
return(-5);
}