OpenSolaris_b135/lib/libadm/common/cktime.c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1997,1998 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*LINTLIBRARY*/
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>
#include <sys/types.h>
#include <stdlib.h>
#include "libadm.h"
static int fmtcheck(char *);
#define PROMPT "Enter the time of day"
#define ERRMSG "Please enter the time of day. Format is"
#define DEFAULT "%H:%M"
#define TLEN 3
#define LH 00
#define UH 23
#define USH 12
#define LM 00
#define UM 59
#define LS 00
#define US 59
#define DELIM1 ':'
#define BLANK ' '
#define TAB ' '
static void
setmsg(char *msg, char *fmt)
{
if (fmt == NULL)
fmt = DEFAULT;
(void) sprintf(msg, "%s <%s>.", ERRMSG, fmt);
}
static char *
p_ndig(char *string, int *value)
{
char *ptr;
int accum = 0;
int n = 2;
if (!string)
return (0);
for (ptr = string; *ptr && n > 0; n--, ptr++) {
if (! isdigit((unsigned char)*ptr))
return (NULL);
accum = (10 * accum) + (*ptr - '0');
}
if (n)
return (NULL);
*value = accum;
return (ptr);
}
static char *
p_time(char *string, int llim, int ulim)
{
char *ptr;
int begin = -1;
if (!(ptr = p_ndig(string, &begin)))
return (NULL);
if (begin >= llim && begin <= ulim)
return (ptr);
else return (NULL);
}
/* p_meridian will parse the string for the meridian - AM/PM or am/pm */
static char *
p_meridian(char *string)
{
static char *middle[] = { "AM", "PM", "am", "pm" };
int legit, n;
char mid[TLEN];
legit = 0;
n = 0;
mid[2] = '\0';
(void) sscanf(string, "%2s", mid);
while (!(legit) && (n < 4)) {
if ((strncmp(mid, middle[n], 2)) == 0)
legit = 1; /* found legitimate string */
n++;
}
if (legit)
return (string+2);
return (NULL);
}
static char *
p_delim(char *string, char dchoice)
{
char dlm;
if (! string)
return (NULL);
(void) sscanf(string, "%1c", &dlm);
return ((dlm == dchoice) ? string + 1 : NULL);
}
int
cktime_val(char *fmt, char *input)
{
char ltrl, dfl;
int valid = 1; /* time of day string is valid for format */
if ((fmt != NULL) && (fmtcheck(fmt) == 1))
return (4);
if (fmt == NULL)
fmt = DEFAULT;
ltrl = '\0';
while (*fmt && valid) {
if ((*fmt) == '%') {
switch (*++fmt) {
case 'H':
input = p_time(input, LH, UH);
if (!input)
valid = 0;
break;
case 'M':
input = p_time(input, LM, UM);
if (!input)
valid = 0;
break;
case 'S':
input = p_time(input, LS, US);
if (!input)
valid = 0;
break;
case 'T':
input = p_time(input, LH, UH);
if (!input) {
valid = 0;
break;
}
input = p_delim(input, DELIM1);
if (!input) {
valid = 0;
break;
}
input = p_time(input, LM, UM);
if (!input) {
valid = 0;
break;
}
input = p_delim(input, DELIM1);
if (!input) {
valid = 0;
break;
}
input = p_time(input, LS, US);
if (!input)
valid = 0;
break;
case 'R':
input = p_time(input, LH, UH);
if (!input) {
valid = 0;
break;
}
input = p_delim(input, DELIM1);
if (!input) {
valid = 0;
break;
}
input = p_time(input, LM, UM);
if (!input) {
valid = 0;
break;
}
break;
case 'r':
input = p_time(input, LH, USH);
if (!input) {
valid = 0;
break;
}
input = p_delim(input, DELIM1);
if (!input) {
valid = 0;
break;
}
input = p_time(input, LM, UM);
if (!input) {
valid = 0;
break;
}
input = p_delim(input, DELIM1);
if (!input) {
valid = 0;
break;
}
input = p_time(input, LS, US);
if (!input) {
valid = 0;
break;
}
input = p_delim(input, BLANK);
if (!input) {
valid = 0;
break;
}
input = p_meridian(input);
if (!input)
valid = 0;
break;
case 'I':
input = p_time(input, LH, USH);
if (!input)
valid = 0;
break;
case 'p':
input = p_meridian(input);
if (!input)
valid = 0;
break;
default:
(void) sscanf(input++, "%1c", <rl);
}
} else {
dfl = '\0';
(void) sscanf(input, "%1c", &dfl);
input++;
}
fmt++;
}
if (!(*fmt) && (input) && (*input))
valid = 0;
return ((valid == 0));
}
int
cktime_err(char *fmt, char *error)
{
char defmesg[128];
if ((fmt != NULL) && (fmtcheck(fmt) == 1))
return (4);
setmsg(defmesg, fmt);
puterror(stdout, defmesg, error);
return (0);
}
int
cktime_hlp(char *fmt, char *help)
{
char defmesg[128];
if ((fmt != NULL) && (fmtcheck(fmt) == 1))
return (4);
setmsg(defmesg, fmt);
puthelp(stdout, defmesg, help);
return (0);
}
/*
* A little state machine that checks out the format to
* make sure it is acceptable.
* return value 1: NG
* return value 0: OK
*/
int
fmtcheck(char *fmt)
{
int percent = 0;
while (*fmt) {
switch (*fmt++) {
case '%': /* previous state must be start or letter */
if (percent == 0)
percent = 1;
else
return (1);
break;
case 'H': /* previous state must be "%" */
case 'M':
case 'S':
case 'T':
case 'R':
case 'r':
case 'I':
case 'p':
if (percent == 1)
percent = 0;
else
return (1);
break;
case TAB: /* previous state must be start or letter */
case BLANK:
case DELIM1:
if (percent == 1)
return (1);
break;
default:
return (1);
}
}
return (percent);
}
int
cktime(char *tod, char *fmt, char *defstr, char *error, char *help,
char *prompt)
{
char input[MAX_INPUT],
defmesg[128];
if ((fmt != NULL) && (fmtcheck(fmt) == 1))
return (4);
if (fmt == NULL)
fmt = DEFAULT;
setmsg(defmesg, fmt);
if (!prompt)
prompt = "Enter a time of day";
start:
putprmpt(stderr, prompt, NULL, defstr);
if (getinput(input))
return (1);
if (!strlen(input)) {
if (defstr) {
(void) strcpy(tod, defstr);
return (0);
}
puterror(stderr, defmesg, error);
goto start;
}
if (strcmp(input, "?") == 0) {
puthelp(stderr, defmesg, help);
goto start;
}
if (ckquit && (strcmp(input, "q") == 0))
return (3);
if (cktime_val(fmt, input)) {
puterror(stderr, defmesg, error);
goto start;
}
(void) strcpy(tod, input);
return (0);
}