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