Subversion Repositories SvarDOS

Rev

Rev 410 | Rev 421 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
407 mateuszvis 1 
/*
2 
 * chcp
3 
 */
4 
 
5 
static int cmd_chcp(struct cmd_funcparam *p) {
410 mateuszvis 6 
  unsigned short nnn = 0;
407 mateuszvis 7 
  unsigned short errcode = 0;
8 
 
9 
  if (cmd_ishlp(p)) {
10 
    outputnl("Displays or sets the active code page number");
11 
    outputnl("");
12 
    outputnl("CHCP [nnn]");
13 
    outputnl("");
14 
    outputnl("nnn  Specifies a code page number");
15 
    outputnl("");
16 
    outputnl("Type CHCP without a parameter to display the active code page number.");
17 
    return(-1);
18 
  }
19 
 
20 
  /* too many parameters */
21 
  if (p->argc > 1) {
22 
    outputnl("Too many parameters");
23 
    return(-1);
24 
  }
25 
 
26 
  /* one param? must be numeric in range 1+ */
27 
  if (p->argc == 1) {
414 mateuszvis 28 
    unsigned char nlsfuncflag = 0;
410 mateuszvis 29 
    if (atouns(&nnn, p->argv[0]) != 0) {
407 mateuszvis 30 
      outputnl("Invalid code page number");
31 
      return(-1);
32 
    }
33 
    _asm {
414 mateuszvis 34 
      /* verify that NLSFUNC is installed */
407 mateuszvis 35 
      push ax
36 
      push bx
37 
 
414 mateuszvis 38 
      mov ax, 0x1400    /* DOS 3+ -- is NLSFUNC.EXE installed? */
39 
      int 0x2f          /* AL = 0xff -> installed */
40 
      cmp al, 0xff
41 
      jne DONE
42 
      mov [nlsfuncflag], 1
43 
 
44 
      /* set code page to nnn */
45 
 
407 mateuszvis 46 
      mov ax, 0x6602    /* DOS 3.3+ -- Activate Code Page */
47 
      mov bx, [nnn]
48 
      int 0x21          /* CF set on error and err code in AX */
49 
      jnc DONE
50 
      mov [errcode], ax /* store err code in nnn on failure */
51 
      DONE:
52 
 
53 
      pop bx
54 
      pop ax
55 
    }
414 mateuszvis 56 
    if (nlsfuncflag == 0) {
407 mateuszvis 57 
      outputnl("NLSFUNC not installed");
58 
    } else if (errcode != 0) {
59 
      outputnl("Failed to change code page");
60 
    }
61 
 
62 
  } else { /* no parameter given: display active code page */
63 
 
64 
    _asm {
65 
      push ax
66 
      push bx
67 
      push dx
68 
 
69 
      mov ax, 0x6601      /* DOS 3.3+ -- Query Active Code Page */
70 
      int 0x21            /* CF set on error, current CP in BX */
71 
      mov [nnn], bx
72 
      jnc DONE
73 
      mov [errcode], ax
74 
      DONE:
75 
 
76 
      pop dx
77 
      pop bx
78 
      pop ax
79 
    }
80 
    if (errcode == 0) {
81 
      sprintf(p->BUFFER, "Active code page: %d", nnn);
82 
      outputnl(p->BUFFER);
83 
    } else {
84 
      outputnl(doserr(errcode));
85 
    }
86 
  }
87 
 
88 
  return(-1);
89 
}