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/*
**********************************************************************
* Copyright (C) 1998-2000, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
*
* File date.c
*
* Modification History:
*
* Date Name Description
* 06/11/99 stephen Creation.
* 06/16/99 stephen Modified to use uprint.
*******************************************************************************
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "unicode/utypes.h"
#include "unicode/ustring.h"
#include "unicode/uclean.h"
#include "unicode/ucnv.h"
#include "unicode/udat.h"
#include "unicode/ucal.h"
#include "uprint.h"
/* Protos */
static void usage(void);
static void version(void);
static void date(const UChar *tz, UDateFormatStyle style, UErrorCode *status);
int main(int argc, char **argv);
/* The version of date */
#define DATE_VERSION "1.0"
/* "GMT" */
static const UChar GMT_ID [] = { 0x0047, 0x004d, 0x0054, 0x0000 };
int
main(int argc,
char **argv)
{
int printUsage = 0;
int printVersion = 0;
int optind = 1;
char *arg;
const UChar *tz = 0;
UDateFormatStyle style = UDAT_DEFAULT;
UErrorCode status = U_ZERO_ERROR;
/* parse the options */
for(optind = 1; optind < argc; ++optind) {
arg = argv[optind];
/* version info */
if(strcmp(arg, "-v") == 0 || strcmp(arg, "--version") == 0) {
printVersion = 1;
}
/* usage info */
else if(strcmp(arg, "-h") == 0 || strcmp(arg, "--help") == 0) {
printUsage = 1;
}
/* display date in gmt */
else if(strcmp(arg, "-u") == 0 || strcmp(arg, "--gmt") == 0) {
tz = GMT_ID;
}
/* display date in gmt */
else if(strcmp(arg, "-f") == 0 || strcmp(arg, "--full") == 0) {
style = UDAT_FULL;
}
/* display date in long format */
else if(strcmp(arg, "-l") == 0 || strcmp(arg, "--long") == 0) {
style = UDAT_LONG;
}
/* display date in medium format */
else if(strcmp(arg, "-m") == 0 || strcmp(arg, "--medium") == 0) {
style = UDAT_MEDIUM;
}
/* display date in short format */
else if(strcmp(arg, "-s") == 0 || strcmp(arg, "--short") == 0) {
style = UDAT_SHORT;
}
/* POSIX.1 says all arguments after -- are not options */
else if(strcmp(arg, "--") == 0) {
/* skip the -- */
++optind;
break;
}
/* unrecognized option */
else if(strncmp(arg, "-", strlen("-")) == 0) {
printf("icudate: invalid option -- %s\n", arg+1);
printUsage = 1;
}
/* done with options, display date */
else {
break;
}
}
/* print usage info */
if(printUsage) {
usage();
return 0;
}
/* print version info */
if(printVersion) {
version();
return 0;
}
/* print the date */
date(tz, style, &status);
u_cleanup();
return (U_FAILURE(status) ? 1 : 0);
}
/* Usage information */
static void
usage()
{
puts("Usage: icudate [OPTIONS]");
puts("Options:");
puts(" -h, --help Print this message and exit.");
puts(" -v, --version Print the version number of date and exit.");
puts(" -u, --gmt Display the date in Greenwich Mean Time.");
puts(" -f, --full Use full display format.");
puts(" -l, --long Use long display format.");
puts(" -m, --medium Use medium display format.");
puts(" -s, --short Use short display format.");
}
/* Version information */
static void
version()
{
printf("icudate version %s (ICU version %s), created by Stephen F. Booth.\n",
DATE_VERSION, U_ICU_VERSION);
puts(U_COPYRIGHT_STRING);
}
/* Format the date */
static void
date(const UChar *tz,
UDateFormatStyle style,
UErrorCode *status)
{
UChar *s = 0;
int32_t len = 0;
UDateFormat *fmt;
fmt = udat_open(style, style, 0, tz, -1,NULL,0, status);
len = udat_format(fmt, ucal_getNow(), 0, len, 0, status);
if(*status == U_BUFFER_OVERFLOW_ERROR) {
*status = U_ZERO_ERROR;
s = (UChar*) malloc(sizeof(UChar) * (len+1));
if(s == 0) goto finish;
udat_format(fmt, ucal_getNow(), s, len + 1, 0, status);
if(U_FAILURE(*status)) goto finish;
}
/* print the date string */
uprint(s, stdout, status);
/* print a trailing newline */
printf("\n");
finish:
udat_close(fmt);
free(s);
}
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