WebSVN – SvarDOS – Diff – /svarcom/trunk/cmd/date.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.
 */
 
/*
 * date [date]
 */
 
 
/* parse a NULL-terminated string int hour, minutes and seconds, returns 0 on success
 * valid inputs: 0, 7, 5:5, 23:23, 17:54:45, 9p, 9:05, ...
 */
static int cmd_date_parse(const char *s, unsigned short *year, unsigned char *mo, unsigned char *dy, struct nls_patterns *nls) {
  unsigned short i;
  const char *ptrs[2] = {NULL, NULL};
 
  *year = 0;
  *mo = 0;
  *dy = 0;
 
  /* validate input - must contain only chars 0-9 and time separator */
  for (i = 0; s[i] != 0; i++) {
    switch (s[i]) {
      case '0':
      case '1':
      case '2':
      case '3':
      case '4':
      case '5':
      case '6':
      case '7':
      case '8':
      case '9':
        break;
      default:
        if ((s[i] != nls->datesep[0]) || (i == 0)) return(-1);
        if (ptrs[0] == NULL) {
          ptrs[0] = s + i + 1;
        } else if (ptrs[1] == NULL) {
          ptrs[1] = s + i + 1;
        } else { /* too many separators */
          return(-1);
        }
        break;
    }
  }
 
  /* did I get all separators? */
  if ((ptrs[0] == NULL) || (ptrs[1] == NULL)) goto FAIL;
 
  /* d/m/y order depends on NLS settings */
  switch (nls->dateformat) {
    case 0:  /* m/d/y */
      atous(&i, s);
      *mo = i;
      atous(&i, ptrs[0]);
      *dy = i;
      atous(year, ptrs[1]);
      break;
    case 1:  /* d/m/y */
      atous(&i, s);
      *dy = i;
      atous(&i, ptrs[0]);
      *mo = i;
      atous(year, ptrs[1]);
      break;
    default: /* y/m/d */
      atous(year, s);
      atous(&i, ptrs[0]);
      *mo = i;
      atous(&i, ptrs[1]);
      *dy = i;
      break;
  }
 
  return(0);
 
  FAIL:
  *year = 0;
  return(-1);
}
 
 
/* set system date, return 0 on success */
static int cmd_date_set(unsigned short year, unsigned char mo, unsigned char dy) {
  _asm {
    push ax
    push bx
    push cx
    push dx
 
    mov ax, 0x2b00 /* DOS 1+ -- Set DOS Date */
    mov cx, [year] /* year (1980-2099) */
    mov dh, [mo]   /* month (1-12) */
    mov dl, [dy]   /* day (1-31) */
    int 0x21       /* AL = 0 on success */
    cmp al, 0
    je DONE
    mov [year], 0
    DONE:
 
    pop dx
    pop cx
    pop bx
    pop ax
  }
 
  if (year == 0) return(-1);
  return(0);
}
 
 
static int cmd_date(struct cmd_funcparam *p) {
  struct nls_patterns *nls = (void *)(p->BUFFER);
  char *buff = p->BUFFER + sizeof(*nls);
  unsigned short i;
  unsigned short year = 0;
  unsigned char mo, dy;
 
  if (cmd_ishlp(p)) {
    outputnl("Displays or sets the system date.");
    outputnl("");
    outputnl("DATE [date]");
    outputnl("");
    outputnl("Type DATE with no parameters to display the current date and a prompt for a");
    outputnl("new one. Press ENTER to keep the same date.");
    return(-1);
  }
 
  i = nls_getpatterns(nls);
  if (i != 0) {
    outputnl(doserr(i));
    return(-1);
  }
 
  /* display current date if no args */
  if (p->argc == 0) {
    /* get cur date */
    _asm {
      push ax
      push cx
      push dx
 
      mov ah, 0x2a  /* DOS 1+ -- Query DOS Date */
      int 0x21      /* CX=year DH=month DL=day */
      mov [year], cx
      mov [mo], dh
      mov [dy], dl
 
      pop dx
      pop cx
      pop ax
    }
    buff[0] = ' ';
    nls_format_date(buff + 1, year, mo, dy, nls);
    output("Current date is");
    outputnl(buff);
    year = 0;
  } else { /* parse date if provided */
    if ((cmd_date_parse(p->argv[0], &year, &mo, &dy, nls) != 0) || (cmd_date_set(year, mo, dy) != 0)) {
      outputnl("Invalid date");
      year = 0;
    }
  }
 
  /* ask for date if not provided or if input was malformed */
  while (year == 0) {
    output("Enter new date:");
    output(" ");
    /* collect user input into buff */
    _asm {
      push ax
      push bx
      push dx
 
      mov ah, 0x0a   /* DOS 1+ -- Buffered String Input */
      mov bx, buff
      mov dx, bx
      mov al, 16
      mov [bx], al   /* max input length */
      mov al, 1
      mov [bx+1], al /* zero out the "previous entry" length */
      int 0x21
      /* terminate the string with a NULL terminator */
      xor ax, ax
      inc bx
      mov al, [bx] /* read length of input string */
      mov bx, ax
      add bx, dx
      mov [bx+2], ah
      /* output a \n */
      mov ah, 2
      mov dl, 0x0A
      int 0x21
 
      pop dx
      pop bx
      pop ax
    }
    if (buff[1] == 0) break; /* empty string = no date change */
    if ((cmd_date_parse(buff + 2, &year, &mo, &dy, nls) == 0) && (cmd_date_set(year, mo, dy) == 0)) break;
    outputnl("Invalid date");
  }
 
  return(-1);
}
 

Rev 431	Rev 501
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	`* date [date]`	26	`* date [date]`
27	`*/`	27	`*/`
28		28
29		29
30	`/* parse a NULL-terminated string int hour, minutes and seconds, returns 0 on success`	30	`/* parse a NULL-terminated string int hour, minutes and seconds, returns 0 on success`
31	`* valid inputs: 0, 7, 5:5, 23:23, 17:54:45, 9p, 9:05, ...`	31	`* valid inputs: 0, 7, 5:5, 23:23, 17:54:45, 9p, 9:05, ...`
32	`*/`	32	`*/`
33	`static int cmd_date_parse(const char s, unsigned short year, unsigned char mo, unsigned char dy, struct nls_patterns *nls) {`	33	`static int cmd_date_parse(const char s, unsigned short year, unsigned char mo, unsigned char dy, struct nls_patterns *nls) {`
34	`unsigned short i;`	34	`unsigned short i;`
35	`const char *ptrs[2] = {NULL, NULL};`	35	`const char *ptrs[2] = {NULL, NULL};`
36		36
37	`*year = 0;`	37	`*year = 0;`
38	`*mo = 0;`	38	`*mo = 0;`
39	`*dy = 0;`	39	`*dy = 0;`
40		40
41	`/* validate input - must contain only chars 0-9 and time separator */`	41	`/* validate input - must contain only chars 0-9 and time separator */`
42	`for (i = 0; s[i] != 0; i++) {`	42	`for (i = 0; s[i] != 0; i++) {`
43	`switch (s[i]) {`	43	`switch (s[i]) {`
44	`case '0':`	44	`case '0':`
45	`case '1':`	45	`case '1':`
46	`case '2':`	46	`case '2':`
47	`case '3':`	47	`case '3':`
48	`case '4':`	48	`case '4':`
49	`case '5':`	49	`case '5':`
50	`case '6':`	50	`case '6':`
51	`case '7':`	51	`case '7':`
52	`case '8':`	52	`case '8':`
53	`case '9':`	53	`case '9':`
54	`break;`	54	`break;`
55	`default:`	55	`default:`
56	`if ((s[i] != nls->datesep[0]) \|\| (i == 0)) return(-1);`	56	`if ((s[i] != nls->datesep[0]) \|\| (i == 0)) return(-1);`
57	`if (ptrs[0] == NULL) {`	57	`if (ptrs[0] == NULL) {`
58	`ptrs[0] = s + i + 1;`	58	`ptrs[0] = s + i + 1;`
59	`} else if (ptrs[1] == NULL) {`	59	`} else if (ptrs[1] == NULL) {`
60	`ptrs[1] = s + i + 1;`	60	`ptrs[1] = s + i + 1;`
61	`} else { /* too many separators */`	61	`} else { /* too many separators */`
62	`return(-1);`	62	`return(-1);`
63	`}`	63	`}`
64	`break;`	64	`break;`
65	`}`	65	`}`
66	`}`	66	`}`
67		67
68	`/* did I get all separators? */`	68	`/* did I get all separators? */`
69	`if ((ptrs[0] == NULL) \|\| (ptrs[1] == NULL)) goto FAIL;`	69	`if ((ptrs[0] == NULL) \|\| (ptrs[1] == NULL)) goto FAIL;`
70		70
71	`/* d/m/y order depends on NLS settings */`	71	`/* d/m/y order depends on NLS settings */`
72	`switch (nls->dateformat) {`	72	`switch (nls->dateformat) {`
73	`case 0: /* m/d/y */`	73	`case 0: /* m/d/y */`
74	`atous(&i, s);`	74	`atous(&i, s);`
75	`*mo = i;`	75	`*mo = i;`
76	`atous(&i, ptrs[0]);`	76	`atous(&i, ptrs[0]);`
77	`*dy = i;`	77	`*dy = i;`
78	`atous(year, ptrs[1]);`	78	`atous(year, ptrs[1]);`
79	`break;`	79	`break;`
80	`case 1: /* d/m/y */`	80	`case 1: /* d/m/y */`
81	`atous(&i, s);`	81	`atous(&i, s);`
82	`*dy = i;`	82	`*dy = i;`
83	`atous(&i, ptrs[0]);`	83	`atous(&i, ptrs[0]);`
84	`*mo = i;`	84	`*mo = i;`
85	`atous(year, ptrs[1]);`	85	`atous(year, ptrs[1]);`
86	`break;`	86	`break;`
87	`default: /* y/m/d */`	87	`default: /* y/m/d */`
88	`atous(year, s);`	88	`atous(year, s);`
89	`atous(&i, ptrs[0]);`	89	`atous(&i, ptrs[0]);`
90	`*mo = i;`	90	`*mo = i;`
91	`atous(&i, ptrs[1]);`	91	`atous(&i, ptrs[1]);`
92	`*dy = i;`	92	`*dy = i;`
93	`break;`	93	`break;`
94	`}`	94	`}`
95		95
96	`return(0);`	96	`return(0);`
97		97
98	`FAIL:`	98	`FAIL:`
99	`*year = 0;`	99	`*year = 0;`
100	`return(-1);`	100	`return(-1);`
101	`}`	101	`}`
102		102
103		103
104	`/* set system date, return 0 on success */`	104	`/* set system date, return 0 on success */`
105	`static int cmd_date_set(unsigned short year, unsigned char mo, unsigned char dy) {`	105	`static int cmd_date_set(unsigned short year, unsigned char mo, unsigned char dy) {`
106	`_asm {`	106	`_asm {`
107	`push ax`	107	`push ax`
108	`push bx`	108	`push bx`
109	`push cx`	109	`push cx`
110	`push dx`	110	`push dx`
111		111
112	`mov ax, 0x2b00 /* DOS 1+ -- Set DOS Date */`	112	`mov ax, 0x2b00 /* DOS 1+ -- Set DOS Date */`
113	`mov cx, [year] /* year (1980-2099) */`	113	`mov cx, [year] /* year (1980-2099) */`
114	`mov dh, [mo] /* month (1-12) */`	114	`mov dh, [mo] /* month (1-12) */`
115	`mov dl, [dy] /* day (1-31) */`	115	`mov dl, [dy] /* day (1-31) */`
116	`int 0x21 /* AL = 0 on success */`	116	`int 0x21 /* AL = 0 on success */`
117	`cmp al, 0`	117	`cmp al, 0`
118	`je DONE`	118	`je DONE`
119	`mov [year], 0`	119	`mov [year], 0`
120	`DONE:`	120	`DONE:`
121		121
122	`pop dx`	122	`pop dx`
123	`pop cx`	123	`pop cx`
124	`pop bx`	124	`pop bx`
125	`pop ax`	125	`pop ax`
126	`}`	126	`}`
127		127
128	`if (year == 0) return(-1);`	128	`if (year == 0) return(-1);`
129	`return(0);`	129	`return(0);`
130	`}`	130	`}`
131		131
132		132
133	`static int cmd_date(struct cmd_funcparam *p) {`	133	`static int cmd_date(struct cmd_funcparam *p) {`
134	`struct nls_patterns nls = (void )(p->BUFFER);`	134	`struct nls_patterns nls = (void )(p->BUFFER);`
135	`char *buff = p->BUFFER + (BUFFER_SIZE / 2);`	135	`char buff = p->BUFFER + sizeof(nls);`
136	`unsigned short i;`	136	`unsigned short i;`
137	`unsigned short year = 0;`	137	`unsigned short year = 0;`
138	`unsigned char mo, dy;`	138	`unsigned char mo, dy;`
139		139
140	`if (cmd_ishlp(p)) {`	140	`if (cmd_ishlp(p)) {`
141	`outputnl("Displays or sets the system date.");`	141	`outputnl("Displays or sets the system date.");`
142	`outputnl("");`	142	`outputnl("");`
143	`outputnl("DATE [date]");`	143	`outputnl("DATE [date]");`
144	`outputnl("");`	144	`outputnl("");`
145	`outputnl("Type DATE with no parameters to display the current date and a prompt for a");`	145	`outputnl("Type DATE with no parameters to display the current date and a prompt for a");`
146	`outputnl("new one. Press ENTER to keep the same date.");`	146	`outputnl("new one. Press ENTER to keep the same date.");`
147	`return(-1);`	147	`return(-1);`
148	`}`	148	`}`
149		149
150	`i = nls_getpatterns(nls);`	150	`i = nls_getpatterns(nls);`
151	`if (i != 0) {`	151	`if (i != 0) {`
152	`outputnl(doserr(i));`	152	`outputnl(doserr(i));`
153	`return(-1);`	153	`return(-1);`
154	`}`	154	`}`
155		155
156	`/* display current date if no args */`	156	`/* display current date if no args */`
157	`if (p->argc == 0) {`	157	`if (p->argc == 0) {`
158	`/* get cur date */`	158	`/* get cur date */`
159	`_asm {`	159	`_asm {`
160	`push ax`	160	`push ax`
161	`push cx`	161	`push cx`
162	`push dx`	162	`push dx`
163		163
164	`mov ah, 0x2a /* DOS 1+ -- Query DOS Date */`	164	`mov ah, 0x2a /* DOS 1+ -- Query DOS Date */`
165	`int 0x21 /* CX=year DH=month DL=day */`	165	`int 0x21 /* CX=year DH=month DL=day */`
166	`mov [year], cx`	166	`mov [year], cx`
167	`mov [mo], dh`	167	`mov [mo], dh`
168	`mov [dy], dl`	168	`mov [dy], dl`
169		169
170	`pop dx`	170	`pop dx`
171	`pop cx`	171	`pop cx`
172	`pop ax`	172	`pop ax`
173	`}`	173	`}`
174	`buff[0] = ' ';`	174	`buff[0] = ' ';`
175	`nls_format_date(buff + 1, year, mo, dy, nls);`	175	`nls_format_date(buff + 1, year, mo, dy, nls);`
176	`output("Current date is");`	176	`output("Current date is");`
177	`outputnl(buff);`	177	`outputnl(buff);`
178	`year = 0;`	178	`year = 0;`
179	`} else { /* parse date if provided */`	179	`} else { /* parse date if provided */`
180	`if ((cmd_date_parse(p->argv[0], &year, &mo, &dy, nls) != 0) \|\| (cmd_date_set(year, mo, dy) != 0)) {`	180	`if ((cmd_date_parse(p->argv[0], &year, &mo, &dy, nls) != 0) \|\| (cmd_date_set(year, mo, dy) != 0)) {`
181	`outputnl("Invalid date");`	181	`outputnl("Invalid date");`
182	`year = 0;`	182	`year = 0;`
183	`}`	183	`}`
184	`}`	184	`}`
185		185
186	`/* ask for date if not provided or if input was malformed */`	186	`/* ask for date if not provided or if input was malformed */`
187	`while (year == 0) {`	187	`while (year == 0) {`
188	`output("Enter new date:");`	188	`output("Enter new date:");`
189	`output(" ");`	189	`output(" ");`
190	`/* collect user input into buff */`	190	`/* collect user input into buff */`
191	`_asm {`	191	`_asm {`
192	`push ax`	192	`push ax`
193	`push bx`	193	`push bx`
194	`push dx`	194	`push dx`
195		195
196	`mov ah, 0x0a /* DOS 1+ -- Buffered String Input */`	196	`mov ah, 0x0a /* DOS 1+ -- Buffered String Input */`
197	`mov bx, buff`	197	`mov bx, buff`
198	`mov dx, bx`	198	`mov dx, bx`
199	`mov al, 16`	199	`mov al, 16`
200	`mov [bx], al /* max input length */`	200	`mov [bx], al /* max input length */`
201	`mov al, 1`	201	`mov al, 1`
202	`mov [bx+1], al /* zero out the "previous entry" length */`	202	`mov [bx+1], al /* zero out the "previous entry" length */`
203	`int 0x21`	203	`int 0x21`
204	`/* terminate the string with a NULL terminator */`	204	`/* terminate the string with a NULL terminator */`
205	`xor ax, ax`	205	`xor ax, ax`
206	`inc bx`	206	`inc bx`
207	`mov al, [bx] /* read length of input string */`	207	`mov al, [bx] /* read length of input string */`
208	`mov bx, ax`	208	`mov bx, ax`
209	`add bx, dx`	209	`add bx, dx`
210	`mov [bx+2], ah`	210	`mov [bx+2], ah`
211	`/* output a \n */`	211	`/* output a \n */`
212	`mov ah, 2`	212	`mov ah, 2`
213	`mov dl, 0x0A`	213	`mov dl, 0x0A`
214	`int 0x21`	214	`int 0x21`
215		215
216	`pop dx`	216	`pop dx`
217	`pop bx`	217	`pop bx`
218	`pop ax`	218	`pop ax`
219	`}`	219	`}`
220	`if (buff[1] == 0) break; /* empty string = no date change */`	220	`if (buff[1] == 0) break; /* empty string = no date change */`
221	`if ((cmd_date_parse(buff + 2, &year, &mo, &dy, nls) == 0) && (cmd_date_set(year, mo, dy) == 0)) break;`	221	`if ((cmd_date_parse(buff + 2, &year, &mo, &dy, nls) == 0) && (cmd_date_set(year, mo, dy) == 0)) break;`
222	`outputnl("Invalid date");`	222	`outputnl("Invalid date");`
223	`}`	223	`}`
224		224
225	`return(-1);`	225	`return(-1);`
226	`}`	226	`}`
227		227

Subversion Repositories SvarDOS

(root)/svarcom/trunk/cmd/date.c – Rev 431 → 501