Viewing file:  strsrch.cpp (9.56 KB) -rw-r--r--
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/*************************************************************************
* © 2016 and later: Unicode, Inc. and others.
* License & terms of use: http://www.unicode.org/copyright.html
*
*************************************************************************
*************************************************************************
* COPYRIGHT:
* Copyright (C) 2002-2006 IBM, Inc. All Rights Reserved.
*
*************************************************************************/
/**
* This program demos string collation
*/
const char gHelpString[] =
"usage: strsrch [options*] -source source_string -pattern pattern_string\n"
"-help Display this message.\n"
"-locale name ICU locale to use. Default is en_US\n"
"-rules rule Collation rules file (overrides locale)\n"
"-french French accent ordering\n"
"-norm Normalizing mode on\n"
"-shifted Shifted mode\n"
"-lower Lower case first\n"
"-upper Upper case first\n"
"-case Enable separate case level\n"
"-level n Sort level, 1 to 5, for Primary, Secndary, Tertiary, Quaternary, Identical\n"
"-source string Source string\n"
"-pattern string Pattern string to look for in source\n"
"-overlap Enable searching to be done on overlapping patterns\n"
"-canonical Enable searching to be done matching canonical equivalent patterns"
"Example strsrch -rules \\u0026b\\u003ca -source a\\u0020b\\u0020bc -pattern b\n"
"The format \\uXXXX is supported for the rules and comparison strings\n"
;
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unicode/utypes.h>
#include <unicode/ucol.h>
#include <unicode/usearch.h>
#include <unicode/ustring.h>
/**
* Command line option variables
* These global variables are set according to the options specified
* on the command line by the user.
*/
char const *opt_locale = "en_US";
char *opt_rules = nullptr;
UBool opt_help = false;
UBool opt_norm = false;
UBool opt_french = false;
UBool opt_shifted = false;
UBool opt_lower = false;
UBool opt_upper = false;
UBool opt_case = false;
UBool opt_overlap = false;
UBool opt_canonical = false;
int opt_level = 0;
char const *opt_source = "International Components for Unicode";
char const *opt_pattern = "Unicode";
UCollator *collator = nullptr;
UStringSearch *search = nullptr;
char16_t rules[100];
char16_t source[100];
char16_t pattern[100];
/**
* Definitions for the command line options
*/
struct OptSpec {
const char *name;
enum {FLAG, NUM, STRING} type;
void *pVar;
};
OptSpec opts[] = {
{"-locale", OptSpec::STRING, &opt_locale},
{"-rules", OptSpec::STRING, &opt_rules},
{"-source", OptSpec::STRING, &opt_source},
{"-pattern", OptSpec::STRING, &opt_pattern},
{"-norm", OptSpec::FLAG, &opt_norm},
{"-french", OptSpec::FLAG, &opt_french},
{"-shifted", OptSpec::FLAG, &opt_shifted},
{"-lower", OptSpec::FLAG, &opt_lower},
{"-upper", OptSpec::FLAG, &opt_upper},
{"-case", OptSpec::FLAG, &opt_case},
{"-level", OptSpec::NUM, &opt_level},
{"-overlap", OptSpec::FLAG, &opt_overlap},
{"-canonical", OptSpec::FLAG, &opt_canonical},
{"-help", OptSpec::FLAG, &opt_help},
{"-?", OptSpec::FLAG, &opt_help},
{nullptr, OptSpec::FLAG, nullptr}
};
/**
* processOptions() Function to read the command line options.
*/
UBool processOptions(int argc, const char **argv, OptSpec opts[])
{
for (int argNum = 1; argNum < argc; argNum ++) {
const char *pArgName = argv[argNum];
OptSpec *pOpt;
for (pOpt = opts; pOpt->name != nullptr; pOpt++) {
if (strcmp(pOpt->name, pArgName) == 0) {
switch (pOpt->type) {
case OptSpec::FLAG:
*static_cast<UBool*>(pOpt->pVar) = true;
break;
case OptSpec::STRING:
argNum ++;
if (argNum >= argc) {
fprintf(stderr, "value expected for \"%s\" option.\n",
pOpt->name);
return false;
}
*static_cast<const char**>(pOpt->pVar) = argv[argNum];
break;
case OptSpec::NUM:
argNum ++;
if (argNum >= argc) {
fprintf(stderr, "value expected for \"%s\" option.\n",
pOpt->name);
return false;
}
char *endp;
int i = strtol(argv[argNum], &endp, 0);
if (endp == argv[argNum]) {
fprintf(stderr,
"integer value expected for \"%s\" option.\n",
pOpt->name);
return false;
}
*static_cast<int*>(pOpt->pVar) = i;
}
break;
}
}
if (pOpt->name == nullptr)
{
fprintf(stderr, "Unrecognized option \"%s\"\n", pArgName);
return false;
}
}
return true;
}
/**
* Creates a collator
*/
UBool processCollator()
{
// Set up an ICU collator
UErrorCode status = U_ZERO_ERROR;
if (opt_rules != nullptr) {
u_unescape(opt_rules, rules, 100);
collator = ucol_openRules(rules, -1, UCOL_OFF, UCOL_TERTIARY,
nullptr, &status);
}
else {
collator = ucol_open(opt_locale, &status);
}
if (U_FAILURE(status)) {
fprintf(stderr, "Collator creation failed.: %d\n", status);
return false;
}
if (status == U_USING_DEFAULT_WARNING) {
fprintf(stderr, "Warning, U_USING_DEFAULT_WARNING for %s\n",
opt_locale);
}
if (status == U_USING_FALLBACK_WARNING) {
fprintf(stderr, "Warning, U_USING_FALLBACK_ERROR for %s\n",
opt_locale);
}
if (opt_norm) {
ucol_setAttribute(collator, UCOL_NORMALIZATION_MODE, UCOL_ON, &status);
}
if (opt_french) {
ucol_setAttribute(collator, UCOL_FRENCH_COLLATION, UCOL_ON, &status);
}
if (opt_lower) {
ucol_setAttribute(collator, UCOL_CASE_FIRST, UCOL_LOWER_FIRST,
&status);
}
if (opt_upper) {
ucol_setAttribute(collator, UCOL_CASE_FIRST, UCOL_UPPER_FIRST,
&status);
}
if (opt_case) {
ucol_setAttribute(collator, UCOL_CASE_LEVEL, UCOL_ON, &status);
}
if (opt_shifted) {
ucol_setAttribute(collator, UCOL_ALTERNATE_HANDLING, UCOL_SHIFTED,
&status);
}
if (opt_level != 0) {
switch (opt_level) {
case 1:
ucol_setAttribute(collator, UCOL_STRENGTH, UCOL_PRIMARY, &status);
break;
case 2:
ucol_setAttribute(collator, UCOL_STRENGTH, UCOL_SECONDARY,
&status);
break;
case 3:
ucol_setAttribute(collator, UCOL_STRENGTH, UCOL_TERTIARY, &status);
break;
case 4:
ucol_setAttribute(collator, UCOL_STRENGTH, UCOL_QUATERNARY,
&status);
break;
case 5:
ucol_setAttribute(collator, UCOL_STRENGTH, UCOL_IDENTICAL,
&status);
break;
default:
fprintf(stderr, "-level param must be between 1 and 5\n");
return false;
}
}
if (U_FAILURE(status)) {
fprintf(stderr, "Collator attribute setting failed.: %d\n", status);
return false;
}
return true;
}
/**
* Creates a string search
*/
UBool processStringSearch()
{
u_unescape(opt_source, source, 100);
u_unescape(opt_pattern, pattern, 100);
UErrorCode status = U_ZERO_ERROR;
search = usearch_openFromCollator(pattern, -1, source, -1, collator, nullptr,
&status);
if (U_FAILURE(status)) {
return false;
}
if (static_cast<bool>(opt_overlap)) {
usearch_setAttribute(search, USEARCH_OVERLAP, USEARCH_ON, &status);
}
if (static_cast<bool>(opt_canonical)) {
usearch_setAttribute(search, USEARCH_CANONICAL_MATCH, USEARCH_ON,
&status);
}
if (U_FAILURE(status)) {
fprintf(stderr, "Error setting search attributes\n");
return false;
}
return true;
}
UBool findPattern()
{
UErrorCode status = U_ZERO_ERROR;
int32_t offset = usearch_next(search, &status);
if (offset == USEARCH_DONE) {
fprintf(stdout, "Pattern not found in source\n");
}
while (offset != USEARCH_DONE) {
fprintf(stdout, "Pattern found at offset %d size %d\n", offset,
usearch_getMatchedLength(search));
offset = usearch_next(search, &status);
}
if (U_FAILURE(status)) {
fprintf(stderr, "Error in searching for pattern %d\n", status);
return false;
}
fprintf(stdout, "End of search\n");
return true;
}
/**
* Main -- process command line, read in and pre-process the test file,
* call other functions to do the actual tests.
*/
int main(int argc, const char** argv)
{
if (!static_cast<bool>(processOptions(argc, argv, opts)) || static_cast<bool>(opt_help)) {
printf(gHelpString);
return -1;
}
if (!static_cast<bool>(processCollator())) {
fprintf(stderr, "Error creating collator\n");
return -1;
}
if (!static_cast<bool>(processStringSearch())) {
fprintf(stderr, "Error creating string search\n");
return -1;
}
fprintf(stdout, "Finding pattern %s in source %s\n", opt_pattern,
opt_source);
findPattern();
ucol_close(collator);
usearch_close(search);
return 0;
}
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