WebSVN – SvarDOS – Diff – /svarcom/trunk/cmd/chcp.c


/* This file is part of the SvarCOM project and is published under the terms
 * of the MIT license.
 *
 * Copyright (C) 2021 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.
 */
 
/*
 * chcp
 */
 
static enum cmd_result cmd_chcp(struct cmd_funcparam *p) {
  unsigned short nnn = 0;
  unsigned short errcode = 0;
 
  if (cmd_ishlp(p)) {
    outputnl("Displays or sets the active code page number");
    outputnl("");
    outputnl("CHCP [nnn]");
    outputnl("");
    outputnl("nnn  Specifies a code page number");
    outputnl("");
    outputnl("Type CHCP without a parameter to display the active code page number.");
    return(CMD_OK);
  }
 
  /* too many parameters */
  if (p->argc > 1) {
    outputnl("Too many parameters");
    return(CMD_FAIL);
  }
 
  /* one param? must be numeric in range 1+ */
  if (p->argc == 1) {
    unsigned char nlsfuncflag = 0;
    if (atous(&nnn, p->argv[0]) != 0) {
      outputnl("Invalid code page number");
      return(CMD_FAIL);
    }
    _asm {
      /* verify that NLSFUNC is installed */
      push ax
      push bx
 
      mov ax, 0x1400    /* DOS 3+ -- is NLSFUNC.EXE installed? */
      int 0x2f          /* AL = 0xff -> installed */
      cmp al, 0xff
      jne DONE
      mov [nlsfuncflag], 1
 
      /* set code page to nnn */
 
      mov ax, 0x6602    /* DOS 3.3+ -- Activate Code Page */
      mov bx, [nnn]
      int 0x21          /* CF set on error and err code in AX */
      jnc DONE
      mov [errcode], ax /* store err code in nnn on failure */
      DONE:
 
      pop bx
      pop ax
    }
    if (nlsfuncflag == 0) {
      outputnl("NLSFUNC not installed");
    } else if (errcode != 0) {
      outputnl("Failed to change code page");
      return(CMD_FAIL);
    }
 
  } else { /* no parameter given: display active code page */
 
    _asm {
      push ax
      push bx
      push dx
 
      mov ax, 0x6601      /* DOS 3.3+ -- Query Active Code Page */
      int 0x21            /* CF set on error, current CP in BX */
      mov [nnn], bx
      jnc DONE
      mov [errcode], ax
      DONE:
 
      pop dx
      pop bx
      pop ax
    }
    if (errcode == 0) {
      sprintf(p->BUFFER, "Active code page: %d", nnn);
      outputnl(p->BUFFER);
    } else {
      nls_outputnl_doserr(errcode);
      return(CMD_FAIL);
    }
  }
 
  return(CMD_OK);
}
 

Rev 533	Rev 538
1	`/* This file is part of the SvarCOM project and is published under the terms`	1	`/* This file is part of the SvarCOM project and is published under the terms`
2	`* of the MIT license.`	2	`* of the MIT license.`
3	`*`	3	`*`
4	`* Copyright (C) 2021 Mateusz Viste`	4	`* Copyright (C) 2021 Mateusz Viste`
5	`*`	5	`*`
6	`* Permission is hereby granted, free of charge, to any person obtaining a`	6	`* Permission is hereby granted, free of charge, to any person obtaining a`
7	`* copy of this software and associated documentation files (the "Software"),`	7	`* copy of this software and associated documentation files (the "Software"),`
8	`* to deal in the Software without restriction, including without limitation`	8	`* to deal in the Software without restriction, including without limitation`
9	`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`	9	`* the rights to use, copy, modify, merge, publish, distribute, sublicense,`
10	`* and/or sell copies of the Software, and to permit persons to whom the`	10	`* and/or sell copies of the Software, and to permit persons to whom the`
11	`* Software is furnished to do so, subject to the following conditions:`	11	`* Software is furnished to do so, subject to the following conditions:`
12	`*`	12	`*`
13	`* The above copyright notice and this permission notice shall be included in`	13	`* The above copyright notice and this permission notice shall be included in`
14	`* all copies or substantial portions of the Software.`	14	`* all copies or substantial portions of the Software.`
15	`*`	15	`*`
16	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`	16	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`
17	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`	17	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`
18	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`	18	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`
19	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`	19	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`
20	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`	20	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`
21	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER`	21	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER`
22	`* DEALINGS IN THE SOFTWARE.`	22	`* DEALINGS IN THE SOFTWARE.`
23	`*/`	23	`*/`
24		24
25	`/*`	25	`/*`
26	`* chcp`	26	`* chcp`
27	`*/`	27	`*/`
28		28
29	`static enum cmd_result cmd_chcp(struct cmd_funcparam *p) {`	29	`static enum cmd_result cmd_chcp(struct cmd_funcparam *p) {`
30	`unsigned short nnn = 0;`	30	`unsigned short nnn = 0;`
31	`unsigned short errcode = 0;`	31	`unsigned short errcode = 0;`
32		32
33	`if (cmd_ishlp(p)) {`	33	`if (cmd_ishlp(p)) {`
34	`outputnl("Displays or sets the active code page number");`	34	`outputnl("Displays or sets the active code page number");`
35	`outputnl("");`	35	`outputnl("");`
36	`outputnl("CHCP [nnn]");`	36	`outputnl("CHCP [nnn]");`
37	`outputnl("");`	37	`outputnl("");`
38	`outputnl("nnn Specifies a code page number");`	38	`outputnl("nnn Specifies a code page number");`
39	`outputnl("");`	39	`outputnl("");`
40	`outputnl("Type CHCP without a parameter to display the active code page number.");`	40	`outputnl("Type CHCP without a parameter to display the active code page number.");`
41	`return(CMD_OK);`	41	`return(CMD_OK);`
42	`}`	42	`}`
43		43
44	`/* too many parameters */`	44	`/* too many parameters */`
45	`if (p->argc > 1) {`	45	`if (p->argc > 1) {`
46	`outputnl("Too many parameters");`	46	`outputnl("Too many parameters");`
47	`return(CMD_FAIL);`	47	`return(CMD_FAIL);`
48	`}`	48	`}`
49		49
50	`/* one param? must be numeric in range 1+ */`	50	`/* one param? must be numeric in range 1+ */`
51	`if (p->argc == 1) {`	51	`if (p->argc == 1) {`
52	`unsigned char nlsfuncflag = 0;`	52	`unsigned char nlsfuncflag = 0;`
53	`if (atous(&nnn, p->argv[0]) != 0) {`	53	`if (atous(&nnn, p->argv[0]) != 0) {`
54	`outputnl("Invalid code page number");`	54	`outputnl("Invalid code page number");`
55	`return(CMD_FAIL);`	55	`return(CMD_FAIL);`
56	`}`	56	`}`
57	`_asm {`	57	`_asm {`
58	`/* verify that NLSFUNC is installed */`	58	`/* verify that NLSFUNC is installed */`
59	`push ax`	59	`push ax`
60	`push bx`	60	`push bx`
61		61
62	`mov ax, 0x1400 /* DOS 3+ -- is NLSFUNC.EXE installed? */`	62	`mov ax, 0x1400 /* DOS 3+ -- is NLSFUNC.EXE installed? */`
63	`int 0x2f /* AL = 0xff -> installed */`	63	`int 0x2f /* AL = 0xff -> installed */`
64	`cmp al, 0xff`	64	`cmp al, 0xff`
65	`jne DONE`	65	`jne DONE`
66	`mov [nlsfuncflag], 1`	66	`mov [nlsfuncflag], 1`
67		67
68	`/* set code page to nnn */`	68	`/* set code page to nnn */`
69		69
70	`mov ax, 0x6602 /* DOS 3.3+ -- Activate Code Page */`	70	`mov ax, 0x6602 /* DOS 3.3+ -- Activate Code Page */`
71	`mov bx, [nnn]`	71	`mov bx, [nnn]`
72	`int 0x21 /* CF set on error and err code in AX */`	72	`int 0x21 /* CF set on error and err code in AX */`
73	`jnc DONE`	73	`jnc DONE`
74	`mov [errcode], ax /* store err code in nnn on failure */`	74	`mov [errcode], ax /* store err code in nnn on failure */`
75	`DONE:`	75	`DONE:`
76		76
77	`pop bx`	77	`pop bx`
78	`pop ax`	78	`pop ax`
79	`}`	79	`}`
80	`if (nlsfuncflag == 0) {`	80	`if (nlsfuncflag == 0) {`
81	`outputnl("NLSFUNC not installed");`	81	`outputnl("NLSFUNC not installed");`
82	`} else if (errcode != 0) {`	82	`} else if (errcode != 0) {`
83	`outputnl("Failed to change code page");`	83	`outputnl("Failed to change code page");`
84	`return(CMD_FAIL);`	84	`return(CMD_FAIL);`
85	`}`	85	`}`
86		86
87	`} else { /* no parameter given: display active code page */`	87	`} else { /* no parameter given: display active code page */`
88		88
89	`_asm {`	89	`_asm {`
90	`push ax`	90	`push ax`
91	`push bx`	91	`push bx`
92	`push dx`	92	`push dx`
93		93
94	`mov ax, 0x6601 /* DOS 3.3+ -- Query Active Code Page */`	94	`mov ax, 0x6601 /* DOS 3.3+ -- Query Active Code Page */`
95	`int 0x21 /* CF set on error, current CP in BX */`	95	`int 0x21 /* CF set on error, current CP in BX */`
96	`mov [nnn], bx`	96	`mov [nnn], bx`
97	`jnc DONE`	97	`jnc DONE`
98	`mov [errcode], ax`	98	`mov [errcode], ax`
99	`DONE:`	99	`DONE:`
100		100
101	`pop dx`	101	`pop dx`
102	`pop bx`	102	`pop bx`
103	`pop ax`	103	`pop ax`
104	`}`	104	`}`
105	`if (errcode == 0) {`	105	`if (errcode == 0) {`
106	`sprintf(p->BUFFER, "Active code page: %d", nnn);`	106	`sprintf(p->BUFFER, "Active code page: %d", nnn);`
107	`outputnl(p->BUFFER);`	107	`outputnl(p->BUFFER);`
108	`} else {`	108	`} else {`
109	`outputnl(doserr(errcode));`	109	`nls_outputnl_doserr(errcode);`
110	`return(CMD_FAIL);`	110	`return(CMD_FAIL);`
111	`}`	111	`}`
112	`}`	112	`}`
113		113
114	`return(CMD_OK);`	114	`return(CMD_OK);`
115	`}`	115	`}`
116		116

Subversion Repositories SvarDOS

(root)/svarcom/trunk/cmd/chcp.c @ 1721 – Rev 533 → 538