Subversion Repositories SvarDOS

/* This file is part of the SvarCOM 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.

 */

/*

 * rename/ren

 */

static enum cmd_result cmd_rename(struct cmd_funcparam *p) {

  char *src = p->BUFFER;

  char *dst = p->BUFFER + 256;

  char *buff1 = p->BUFFER + 512;

  char *buff2 = p->BUFFER + 1024;

  unsigned short i, fnameoffset;

  struct DTA *dta = (void *)0x80; /* use default DTA in PSP */

  if (cmd_ishlp(p)) {

    nls_outputnl(25,0); /* "Renames a file" */

    outputnl("");

    nls_outputnl(25,1); /* "RENAME [drive:][path]filename1 filename2" */

    nls_outputnl(25,2); /* "REN [drive:][path]filename1 filename2" */

    outputnl("");

    nls_outputnl(25,3); /* "Note that you cannot specify a new drive or (...)" */

    return(CMD_OK);

  }

  /* I expect exactly two arguments */

  if (p->argc != 2) {

    nls_outputnl(0,1); /* "Invalid syntax" */

    return(CMD_FAIL);

  }

  /* convert src to truename format */

  i = file_truename(p->argv[0], src);

  if (i != 0) {

    nls_outputnl_doserr(i);

    return(CMD_FAIL);

  }

  /* copy src path to buffers and remember where the filename starts */

  fnameoffset = 0;

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

    buff1[i] = src[i];

    buff2[i] = src[i];

    if (buff1[i] == '\\') fnameoffset = i + 1;

    if (buff1[i] == 0) break;

  }

  /* now append dst filename to the buffer and validate it: cannot contain backslash, slash or ':' */

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

    switch (p->argv[1][i]) {

      case ':':

      case '\\':

      case '/':

        nls_outputnl(0,8); /* "Invalid destination" */

        return(CMD_FAIL);

    }

    buff1[fnameoffset + i] = p->argv[1][i];

    if (buff1[fnameoffset + i] == 0) break;

  }

  /* apply truename to dest to normalize wildcards into ? chars */

  i = file_truename(buff1, dst);

  if (i != 0) {

    nls_outputnl_doserr(i);

    return(CMD_FAIL);

  }

  /* we're good to go, src and dst should look somehow like that now:

   * src   =   C:\TEMP\PATH\FILE????.TXT

   * dst   =   C:\TEMP\PATH\FILE????.DOC

   * buff1 =   C:\TEMP\PATH\

   * buff2 =   C:\TEMP\PATH\

   * fnameoffset = 13

   *

   * src is used for FindFirst/FindNext iterations, then buff1 is filled with

   * the source filename found by FindFirst/FindNext and buff2 is filled with

   * the destination file (with ?'s replaced by whatever is found at the same

   * location in buff1).

   */

  i = findfirst(dta, src, 0);

  if (i != 0) nls_outputnl_doserr(i);

  while (i == 0) {

    /* write found fname into buff1 and dst fname into buff2 - both in FCB

     * format (MYFILE  EXT) so it is easy to compare them */

    file_fname2fcb(buff1 + fnameoffset, dta->fname);

    file_fname2fcb(buff2 + fnameoffset, dst + fnameoffset);

    /* scan buff2 fname for '?' and replace them with whatever is in buff1 */

    for (i = fnameoffset; buff2[i] != 0; i++) {

      if (buff2[i] == '?') buff2[i] = buff1[i];

    }

    /* fill buff1 with the 8+3 found file and convert the one in buff2 to 8+3 as well */

    file_fcb2fname(buff1 + fnameoffset, buff2 + fnameoffset);

    strcpy(buff2 + fnameoffset, buff1 + fnameoffset);

    strcpy(buff1 + fnameoffset, dta->fname);

    /* buff1 contains now a fully resolved source and buff2 a proper destination */

    #if 0  /* DEBUG ("if 1" to enable) */

    output(buff1);

    output(" -> ");

    outputnl(buff2);

    #endif

    /* call DOS to do the actual job */

    i = 0;

    _asm {

      push ax

      push di

      push dx

      push es

      mov ah, 0x56  /* rename file: DS:DX=ASCIIZ of src  ES:DI=ASCIIZ of dst */

      push ds

      pop es

      mov dx, buff1

      mov di, buff2

      int 0x21      /* CF clear on success, otherwise err code in AX */

      jnc DONE

      mov [i], ax   /* copy error code to i */

      DONE:

      pop es

      pop dx

      pop di

      pop ax

    }

    if (i != 0) {

      output(buff1 + fnameoffset);

      output(" -> ");

      output(buff2 + fnameoffset);

      output("  ");

      nls_outputnl_doserr(i);

    }

    /* next please */

    i = findnext(dta);

  }

  return(CMD_OK);

}