Subversion Repositories SvarDOS

/*

 * dir

 *

 * Displays a list of files and subdirectories in a directory.

 *

 * DIR [drive:][path][filename] [/P] [/W] [/A[:]attributes] [/O[[:]sortorder]] [/S] [/B] [/L]

 *

 * /P Pauses after each screenful of information.

 * /W Uses wide list format.

 *

 * /A Displays file with specified attributes:

 *     D Directories           R Read-only files     H Hidden files

 *     A Ready for archiving   S System files        - prefix meaning "not"

 *

 * /O List files in sorted order:

 *     N by name            S by size              E by extension

 *     D by date            G group dirs first     - prefix to reverse order

 *

 * /S Displays files in specified directory and all subdirectories.

 * /B Uses bare format (no heading information or summary)

 * /L Uses lowercases

 */

/* NOTE: /A attributes are matched in an exclusive way, ie. only files with

 *       the specified attributes are matched. This is different from how DOS

 *       itself matches attributes hence DIR cannot rely on the attributes

 *       filter within FindFirst.

 *

 * NOTE: Multiple /A are not supported - only the last one is significant.

 */

static int cmd_dir(struct cmd_funcparam *p) {

  const char *filespecptr = NULL;

  struct DTA *dta = (void *)0x80; /* set DTA to its default location at 80h in PSP */

  unsigned short i;

  unsigned short availrows;  /* counter of available rows on display (used for /P) */

  #define DIR_FLAG_PAUSE  1

  #define DIR_FLAG_WIDE   2

  #define DIR_FLAG_RECUR  4

  #define DIR_FLAG_BARE   8

  #define DIR_FLAG_LCASE 16

  unsigned char flags = 0;

//  unsigned char attribs_show = 0; /* show only files with ALL these attribs */

//  unsigned char attribs_hide = 0; /* hide files with ANY of these attribs */

  if (cmd_ishlp(p)) {

    outputnl("Displays a list of files and subdirectories in a directory");

    outputnl("");

    outputnl("DIR [drive:][path][filename] [/P] [/W] [/A[:]attributes] [/O[[:]sortorder]] [/S] [/B] [/L]");

    outputnl("");

    outputnl("/P Pauses after each screenful of information");

    outputnl("/W Uses wide list format");

    outputnl("");

    outputnl("/A Displays files with specified attributes:");

    outputnl("    D Directories            R Read-only files        H Hidden files");

    outputnl("    A Ready for archiving    S System files           - prefix meaning \"not\"");

    outputnl("");

    outputnl("/O List files in sorted order:");

    outputnl("    N by name                S by size                E by extension");

    outputnl("    D by date                G group dirs first       - prefix to reverse order");

    outputnl("");

    outputnl("/S Displays files in specified directory and all subdirectories");

    outputnl("/B Uses bare format (no heading information or summary)");

    outputnl("/L Uses lowercases");

    /* TODO FIXME REMOVE THIS ONCE ALL IMPLEMENTED */

    outputnl("\r\n*** THIS COMMAND IS NOT FULLY IMPLEMENTED YET ***");

    return(-1);

  }

  /* parse command line */

  for (i = 0; i < p->argc; i++) {

    if (p->argv[i][0] == '/') {

      char arg;

      char neg = 0;

      /* detect negations and get actual argument */

      if (p->argv[i][1] == '-') neg = 1;

      arg = p->argv[i][1 + neg];

      /* */

      switch (arg) {

        case 'a':

        case 'A':

          /* TODO */

          outputnl("/A NOT IMPLEMENTED YET");

          return(-1);

          break;

        case 'b':

        case 'B':

          flags |= DIR_FLAG_BARE;

          break;

        case 'p':

        case 'P':

          flags |= DIR_FLAG_PAUSE;

          if (neg) flags &= (0xff ^ DIR_FLAG_PAUSE);

          break;

        default:

          outputnl("Invalid switch");

          return(-1);

      }

    } else {  /* filespec */

      if (filespecptr != NULL) {

        outputnl("Too many parameters");

        return(-1);

      }

      filespecptr = p->argv[i];

    }

  }

  if (filespecptr == NULL) filespecptr = ".";

  /* special case: "DIR drive:" (truename() fails on "C:" under MS-DOS 6.0) */

  if ((filespecptr[0] != 0) && (filespecptr[1] == ':') && (filespecptr[2] == 0)) {

    if ((filespecptr[0] >= 'a') && (filespecptr[0] <= 'z')) {

      p->BUFFER[0] = filespecptr[0] - ('a' - 1);

    } else {

      p->BUFFER[0] = filespecptr[0] - ('A' - 1);

    }

    i = curpathfordrv(p->BUFFER, p->BUFFER[0]);

  } else {

    i = file_truename(filespecptr, p->BUFFER);

  }

  if (i != 0) {

    outputnl(doserr(i));

    return(-1);

  }

  if ((flags & DIR_FLAG_BARE) == 0) {

    unsigned char drv = p->BUFFER[0];

    char *buff2 = p->BUFFER + (BUFFER_SIZE / 2);

    if (drv >= 'a') {

      drv -= 'a';

    } else {

      drv -= 'A';

    }

    cmd_vol_internal(drv, buff2);

    sprintf(buff2, "Directory of %s", p->BUFFER);

    /* trim at first '?', if any */

    for (i = 0; buff2[i] != 0; i++) if (buff2[i] == '?') buff2[i] = 0;

    outputnl(buff2);

    outputnl("");

  }

  /* if dir: append a backslash (also get its len) */

  i = path_appendbkslash_if_dir(p->BUFFER);

  /* if ends with a \ then append ????????.??? */

  if (p->BUFFER[i - 1] == '\\') strcat(p->BUFFER, "????????.???");

  i = findfirst(dta, p->BUFFER, DOS_ATTR_RO | DOS_ATTR_HID | DOS_ATTR_SYS | DOS_ATTR_DIR | DOS_ATTR_ARC);

  if (i != 0) {

    outputnl(doserr(i));

    return(-1);

  }

  availrows = screen_getheight();

  outputnl(dta->fname);

  availrows--;

  while (findnext(dta) == 0) {

    outputnl(dta->fname);

    if (flags & DIR_FLAG_PAUSE) {

      availrows--;

      if (availrows < 2) {

        press_any_key();

        availrows = screen_getheight();

      }

    }

  }

  return(-1);

}