135 lines
4.2 KiB
C++
135 lines
4.2 KiB
C++
// © 2019 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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// lsr.cpp
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// created: 2019may08 Markus W. Scherer
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#include "unicode/utypes.h"
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#include "charstr.h"
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#include "cmemory.h"
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#include "cstring.h"
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#include "lsr.h"
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#include "uinvchar.h"
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#include "ustr_imp.h"
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U_NAMESPACE_BEGIN
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LSR::LSR(char prefix, const char *lang, const char *scr, const char *r, int32_t f,
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UErrorCode &errorCode) :
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language(nullptr), script(nullptr), region(r),
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regionIndex(indexForRegion(region)), flags(f) {
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if (U_SUCCESS(errorCode)) {
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CharString langScript;
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langScript.append(prefix, errorCode).append(lang, errorCode).append('\0', errorCode);
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int32_t scriptOffset = langScript.length();
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langScript.append(prefix, errorCode).append(scr, errorCode);
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owned = langScript.cloneData(errorCode);
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if (U_SUCCESS(errorCode)) {
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language = owned;
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script = owned + scriptOffset;
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}
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}
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}
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LSR::LSR(StringPiece lang, StringPiece scr, StringPiece r, int32_t f,
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UErrorCode &errorCode) :
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language(nullptr), script(nullptr), region(nullptr),
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regionIndex(indexForRegion(r.data())), flags(f) {
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if (U_SUCCESS(errorCode)) {
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CharString data;
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data.append(lang, errorCode).append('\0', errorCode);
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int32_t scriptOffset = data.length();
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data.append(scr, errorCode).append('\0', errorCode);
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int32_t regionOffset = data.length();
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data.append(r, errorCode);
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owned = data.cloneData(errorCode);
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if (U_SUCCESS(errorCode)) {
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language = owned;
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script = owned + scriptOffset;
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region = owned + regionOffset;
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}
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}
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}
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LSR::LSR(LSR &&other) noexcept :
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language(other.language), script(other.script), region(other.region), owned(other.owned),
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regionIndex(other.regionIndex), flags(other.flags),
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hashCode(other.hashCode) {
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if (owned != nullptr) {
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other.language = other.script = "";
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other.owned = nullptr;
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other.hashCode = 0;
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}
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}
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void LSR::deleteOwned() {
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uprv_free(owned);
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}
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LSR &LSR::operator=(LSR &&other) noexcept {
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this->~LSR();
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language = other.language;
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script = other.script;
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region = other.region;
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regionIndex = other.regionIndex;
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flags = other.flags;
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owned = other.owned;
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hashCode = other.hashCode;
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if (owned != nullptr) {
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other.language = other.script = "";
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other.owned = nullptr;
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other.hashCode = 0;
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}
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return *this;
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}
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UBool LSR::isEquivalentTo(const LSR &other) const {
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return
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uprv_strcmp(language, other.language) == 0 &&
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uprv_strcmp(script, other.script) == 0 &&
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regionIndex == other.regionIndex &&
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// Compare regions if both are ill-formed (and their indexes are 0).
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(regionIndex > 0 || uprv_strcmp(region, other.region) == 0);
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}
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bool LSR::operator==(const LSR &other) const {
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return
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uprv_strcmp(language, other.language) == 0 &&
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uprv_strcmp(script, other.script) == 0 &&
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regionIndex == other.regionIndex &&
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// Compare regions if both are ill-formed (and their indexes are 0).
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(regionIndex > 0 || uprv_strcmp(region, other.region) == 0) &&
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flags == other.flags;
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}
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int32_t LSR::indexForRegion(const char *region) {
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int32_t c = region[0];
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int32_t a = c - '0';
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if (0 <= a && a <= 9) { // digits: "419"
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int32_t b = region[1] - '0';
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if (b < 0 || 9 < b) { return 0; }
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c = region[2] - '0';
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if (c < 0 || 9 < c || region[3] != 0) { return 0; }
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return (10 * a + b) * 10 + c + 1;
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} else { // letters: "DE"
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a = uprv_upperOrdinal(c);
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if (a < 0 || 25 < a) { return 0; }
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int32_t b = uprv_upperOrdinal(region[1]);
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if (b < 0 || 25 < b || region[2] != 0) { return 0; }
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return 26 * a + b + 1001;
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}
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return 0;
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}
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LSR &LSR::setHashCode() {
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if (hashCode == 0) {
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uint32_t h = ustr_hashCharsN(language, static_cast<int32_t>(uprv_strlen(language)));
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h = h * 37 + ustr_hashCharsN(script, static_cast<int32_t>(uprv_strlen(script)));
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h = h * 37 + regionIndex;
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hashCode = h * 37 + flags;
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}
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return *this;
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}
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U_NAMESPACE_END
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