Subversion Repositories SvarDOS

/*

 * Copyright (C) 2021 Mateusz Viste

 *

 * usage: tlumacz en fr pl etc

 *

 * computes a svarcom.lng file that contains all language ressources found

 * inside dirname.

 *

 * DAT format:

 *

 * 4-bytes signature:

 * "SvL\x1b"

 *

 * Then "LANG BLOCKS" follow. Each LANG BLOCK is prefixed with 4 bytes:

 * II LL    - II is the LANG identifier ("EN", "PL", etc) and LL is the size

 *            of the block (65535 bytes max).

 *

 * Inside a LANG BLOCK is a set of strings:

 *

 * II L S  where II is the string's 16-bit identifier, L is its length (1-255)

 *         and S is the actual string. All strings are ASCIIZ-formatted (ie.

 *         end with a NULL terminator).

 *

 * The list of strings ends with a single 0-long string.

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

/* read a single line from fd and fills it into dst, returns line length

 * ending CR/LF is trimmed, as well as any trailing spaces */

static unsigned short readl(char *dst, size_t dstsz, FILE *fd) {

  unsigned short l, lastnonspace = 0;

  if (fgets(dst, dstsz, fd) == NULL) return(0xffff); /* EOF */

  /* trim at first CR or LF and return len */

  for (l = 0; (dst[l] != 0) && (dst[l] != '\r') && (dst[l] != '\n'); l++) {

    if (dst[l] != ' ') lastnonspace = l;

  }

  if (lastnonspace < l) l = lastnonspace + 1; /* rtrim */

  dst[l] = 0;

  return(l);

}

/* parse a line in format "1.50:somestring". fills id and returns a pointer to

 * the actual string part on success, or NULL on error */

static char *parseline(unsigned short *id, char *s) {

  int i;

  int dotpos = 0, colpos = 0, gotdigits = 0;

  /* I must have a . and a : in the first 9 bytes */

  for (i = 0;; i++) {

    if (s[i] == '.') {

      if ((dotpos != 0) || (gotdigits == 0)) break;

      dotpos = i;

      gotdigits = 0;

    } else if (s[i] == ':') {

      if (gotdigits != 0) colpos = i;

      break;

    } else if ((s[i] < '0') || (s[i] > '9')) {

      break;

    }

    gotdigits++;

  }

  /* did I collect everything? */

  if ((dotpos == 0) || (colpos == 0)) return(NULL);

  if (s[colpos + 1] == 0) return(NULL);

  *id = atoi(s);

  *id <<= 8;

  *id |= atoi(s + dotpos + 1);

  /* printf("parseline(): %04X = '%s'\r\n", *id, s + colpos + 1); */

  return(s + colpos + 1);

}

/* opens a CATS-style file and compiles it into a ressources lang block */

static unsigned short gen_langstrings(unsigned char *buff, const char *langid) {

  unsigned short len = 0, linelen;

  FILE *fd;

  char fname[] = "NLS\\SVARCOM.XX";

  char linebuf[512];

  char *ptr;

  unsigned short id, linecount;

  strcpy(fname + strlen(fname) - 2, langid);

  fd = fopen(fname, "rb");

  if (fd == NULL) {

    printf("ERROR: FAILED TO OPEN '%s'\r\n", fname);

    return(0);

  }

  for (linecount = 1;; linecount++) {

    linelen = readl(linebuf, sizeof(linebuf), fd);

    if (linelen == 0xffff) break; /* EOF */

    if ((linelen == 0) || (linebuf[0] == '#')) continue;

    /* read id and get ptr to actual string ("1.15:string") */

    ptr = parseline(&id, linebuf);

    if (ptr == NULL) {

      printf("ERROR: line #%u of %s is malformed\r\n", linecount, fname);

      len = 0;

      break;

    }

    /* write string into block (II L S) */

    memcpy(buff + len, &id, 2);

    len += 2;

    buff[len++] = strlen(ptr) + 1;

    memcpy(buff + len, ptr, strlen(ptr) + 1);

    len += strlen(ptr) + 1;

  }

  /* write the block terminator (0-long string) */

  buff[len++] = 0; /* id */

  buff[len++] = 0; /* id */

  buff[len++] = 0; /* len */

  fclose(fd);

  return(len);

}

int main(int argc, char **argv) {

  FILE *fd;

  int ecode = 0;

  char *buff;

  unsigned short i;

  if (argc < 2) {

    puts("usage: tlumacz en fr pl etc");

    return(1);

  }

  buff = malloc(65500);

  if (buff == NULL) {

    puts("out of memory");

    return(1);

  }

  fd = fopen("svarcom.lng", "wb");

  if (fd == NULL) {

    puts("ERR: failed to open or create SVARCOM.LNG");

    return(1);

  }

  /* write sig */

  fwrite("SvL\x1b", 1, 4, fd);

  /* write lang blocks */

  for (i = 1; i < argc; i++) {

    unsigned short sz;

    char id[3];

    if (strlen(argv[i]) != 2) {

      printf("INVALID LANG SPECIFIED: %s\r\n", argv[i]);

      ecode = 1;

      break;

    }

    id[0] = argv[i][0];

    id[1] = argv[i][1];

    id[2] = 0;

    if (id[0] >= 'a') id[0] -= 'a' - 'A';

    if (id[1] >= 'a') id[1] -= 'a' - 'A';

    sz = gen_langstrings(buff, id);

    if (sz == 0) {

      printf("ERROR COMPUTING LANG '%s'\r\n", id);

      ecode = 1;

      break;

    } else {

      printf("computed %s lang block of %u bytes\r\n", id, sz);

    }

    /* write lang ID to file, followed by block size and then the actual block */

    if ((fwrite(id, 1, 2, fd) != 2) ||

        (fwrite(&sz, 1, 2, fd) != 2) ||

        (fwrite(buff, 1, sz, fd) != sz)) {

      printf("ERROR WRITING TO OUTPUT FILE\r\n");

      ecode = 1;

      break;

    }

    /* if EN, then it is also the default block */

    if (strcmp(id, "EN") == 0) {

      FILE *fd2;

      fd2 = fopen("DEFAULT.LNG", "wb");

      if (fd2 == NULL) {

        puts("ERROR: FAILED TO OPEN OR CREATE DEFAULT.LNG");

        break;

      }

      fwrite(id, 1, 2, fd2);    /* lang block id */

      fwrite(&sz, 1, 2, fd2);   /* lang block size */

      fwrite(buff, 1, sz, fd2); /* langblock content (strings) */

      fclose(fd2);

    }

  }

  fclose(fd);

  return(ecode);

}