Subversion Repositories SvarDOS

/* 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 "deflang.c"

#include "svarlang.h"


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) {
      ptr += 3;
      return(ptr);
    }
    if (ptr[2] == 0) return(NULL);
    ptr += ptr[2] + 3;
  }
}


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) || (nlspath == NULL)) return(-1);

  langid = *((unsigned short *)lang);
  langid &= 0xDFDF; /* make sure lang is upcase */

  /* copy nlspath to buff and remember len */
  for (i = 0; nlspath[i] != 0; i++) buff[i] = nlspath[i];

  /* */
  if ((i > 0) && (buff[i - 1] == '\\')) i--;

  buff[i++] = '\\';
  strcpy(buff + i, progname);
  strcat(buff + i, ".lng");

  fd = fopen(buff, "rb");
  if (fd == NULL) return(-2);

  /* 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] >= sizeof(svarlang_mem)) {
      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);
}