/*************************************************************************
*
* Copyright (C) 2016 and later: Unicode, Inc. and others.
* License & terms of use: http://www.unicode.org/copyright.html#License
*
**************************************************************************
**************************************************************************
*
* Copyright (C) 2001-2006, International Business Machines
* Corporation and others. All Rights Reserved.
*
**************************************************************************
*
* ufortune - An ICU resources sample program
*
* Demonstrates
* Defining resources for use by an application
* Compiling and packaging them into a dll
* Referencing the resource-containing dll from application code
* Loading resource data using ICU's API
*
* Created Nov. 7, 2001 by Andy Heninger
*
* ufortune is a variant of the Unix "fortune" command, with
* ICU resources that contain the fortune-cookie sayings.
* Using resources allows fortunes in different languages to
* be selected based on locale.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "unicode/udata.h" /* ICU API for data handling. */
#include "unicode/ures.h" /* ICU API for resource loading */
#include "unicode/ustdio.h" /* ICU API for reading & writing Unicode data */
/* to files, possibly including character */
/* set conversions. */
#include "unicode/ustring.h"
#ifndef UFORTUNE_NOSETAPPDATA
/*
* Resource Data Reference. The data is packaged as a dll (or .so or
* whatever, depending on the platform) that exports a data
* symbol. The application (that's us) references that symbol,
* here, and will pass the data address to ICU, which will then
* be able to fetch resources from the data.
*/
extern const void U_IMPORT *fortune_resources_dat;
#endif
void u_write(const UChar *what, int len);
/*
* main() This one function is all of the application code.
*/
int main(int argc, char **argv)
{
UBool displayUsage = FALSE; /* Set true if command line err or help */
/* option was requested. */
UBool verbose = FALSE; /* Set true if -v command line option. */
char *optionError = NULL; /* If command line contains an unrecognized */
/* option, this will point to it. */
char *locale=NULL; /* Locale name. Null for system default, */
/* otherwise set from command line. */
const char * programName = argv[0]; /* Program invocation name. */
UFILE *u_stdout; /* Unicode stdout file. */
UErrorCode err = U_ZERO_ERROR; /* Error return, used for most ICU */
/* functions. */
UResourceBundle *myResources; /* ICU Resource "handles" */
UResourceBundle *fortunes_r;
int32_t numFortunes; /* Number of fortune strings available. */
int i;
const UChar *resString; /* Points to strings fetched from Resources. */
int32_t len;
/* Process command line options.
* -l locale specify a locale
* -v verbose mode. Display extra messages.
* -? or --help display a usage line
*/
for (i=1; i<argc; i++) {
if (strcmp(argv[i], "-l") ==0) {
if (++i < argc) {
locale = argv[i];
}
continue;
}
if (strcmp(argv[i], "-v") == 0) {
verbose = TRUE;
continue;}
if (strcmp(argv[i], "-?") == 0 ||
strcmp(argv[i], "--help") == 0) {
displayUsage = TRUE;
continue;}
optionError = argv[i];
displayUsage = TRUE;
break;
}
/* ICU's icuio package provides a convenient way to write Unicode
* data to stdout. The string data that we get from resources
* will be UChar * strings, which icuio can handle nicely.
*/
u_stdout = u_finit(stdout, NULL /*locale*/, NULL /*codepage */);
if (verbose) {
u_fprintf(u_stdout, "%s: checking output via icuio.\n", programName);
}
#ifndef UFORTUNE_NOSETAPPDATA
/* Tell ICU where our resource data is located in memory.
* The data lives in the Fortune_Resources dll, and we just
* pass the address of an exported symbol from that library
* to ICU.
*/
udata_setAppData("fortune_resources", &fortune_resources_dat, &err);
if (U_FAILURE(err)) {
fprintf(stderr, "%s: udata_setAppData failed with error \"%s\"\n", programName, u_errorName(err));
exit(-1);
}
#endif
/* Open our resources.
*/
myResources = ures_open("fortune_resources", locale, &err);
if (U_FAILURE(err)) {
fprintf(stderr, "%s: ures_open failed with error \"%s\"\n", programName, u_errorName(err));
exit(-1);
}
if (verbose) {
u_fprintf(u_stdout, "status from ures_open(\"fortune_resources\", %s) is %s\n",
locale? locale: " ", u_errorName(err));
}
/*
* Display any command line option usage errors and/or the
* usage help message. These messages come from our resource bundle.
*/
if (optionError != NULL) {
const UChar *msg = ures_getStringByKey(myResources, "optionMessage", &len, &err);
if (U_FAILURE(err)) {
fprintf(stderr, "%s: ures_getStringByKey(\"optionMessage\") failed, %s\n",
programName, u_errorName(err));
exit(-1);
}
u_file_write(msg, len, u_stdout); /* msg is UChar *, from resource */
u_fprintf(u_stdout, " %s\n", optionError); /* optionError is char *, from argv */
}
if (displayUsage) {
const UChar *usage;
int returnValue=0;
usage = ures_getStringByKey(myResources, "usage", &len, &err);
if (U_FAILURE(err)) {
fprintf(stderr, "%s: ures_getStringByKey(\"usage\") failed, %s\n", programName, u_errorName(err));
exit(-1);
}
u_file_write(usage, len, u_stdout);
if (optionError != NULL) {returnValue = -1;}
return returnValue;
}
/*
* Open the "fortunes" resources from within the already open resources
*/
fortunes_r = ures_getByKey(myResources, "fortunes", NULL, &err);
if (U_FAILURE(err)) {
fprintf(stderr, "%s: ures_getByKey(\"fortunes\") failed, %s\n", programName, u_errorName(err));
exit(-1);
}
/*
* Pick up and display a random fortune
*
*/
numFortunes = ures_countArrayItems(myResources, "fortunes", &err);
if (U_FAILURE(err)) {
fprintf(stderr, "%s: ures_countArrayItems(\"fortunes\") failed, %s\n", programName, u_errorName(err));
exit(-1);
}
if (numFortunes <= 0) {
fprintf(stderr, "%s: no fortunes found.\n", programName);
exit(-1);
}
i = (int)time(NULL) % numFortunes; /* Use time to pick a somewhat-random fortune. */
resString = ures_getStringByIndex(fortunes_r, i, &len, &err);
if (U_FAILURE(err)) {
fprintf(stderr, "%s: ures_getStringByIndex(%d) failed, %s\n", programName, i, u_errorName(err));
exit(-1);
}
u_file_write(resString, len, u_stdout); /* Write out the message */
u_fputc(0x0a, u_stdout); /* and a trailing newline */
return 0;
}