Source code
Revision control
Copy as Markdown
Other Tools
// © 2016 and later: Unicode, Inc. and others.
/*
*******************************************************************************
* Copyright (C) 2016, International Business Machines
* Corporation and others. All Rights Reserved.
*******************************************************************************
* dayperiodrules.cpp
*
* created on: 2016-01-20
* created by: kazede
*/
#include "dayperiodrules.h"
#include "unicode/ures.h"
#include "charstr.h"
#include "cstring.h"
#include "ucln_in.h"
#include "uhash.h"
#include "umutex.h"
#include "uresimp.h"
U_NAMESPACE_BEGIN
namespace {
struct DayPeriodRulesData : public UMemory {
DayPeriodRulesData() : localeToRuleSetNumMap(nullptr), rules(nullptr), maxRuleSetNum(0) {}
UHashtable *localeToRuleSetNumMap;
DayPeriodRules *rules;
int32_t maxRuleSetNum;
} *data = nullptr;
enum CutoffType {
CUTOFF_TYPE_UNKNOWN = -1,
CUTOFF_TYPE_BEFORE,
CUTOFF_TYPE_AFTER, // TODO: AFTER is deprecated in CLDR 29. Remove.
CUTOFF_TYPE_FROM,
CUTOFF_TYPE_AT
};
} // namespace
struct DayPeriodRulesDataSink : public ResourceSink {
DayPeriodRulesDataSink() {
for (int32_t i = 0; i < UPRV_LENGTHOF(cutoffs); ++i) { cutoffs[i] = 0; }
}
virtual ~DayPeriodRulesDataSink();
virtual void put(const char *key, ResourceValue &value, UBool, UErrorCode &errorCode) override {
ResourceTable dayPeriodData = value.getTable(errorCode);
if (U_FAILURE(errorCode)) { return; }
for (int32_t i = 0; dayPeriodData.getKeyAndValue(i, key, value); ++i) {
if (uprv_strcmp(key, "locales") == 0) {
ResourceTable locales = value.getTable(errorCode);
if (U_FAILURE(errorCode)) { return; }
for (int32_t j = 0; locales.getKeyAndValue(j, key, value); ++j) {
UnicodeString setNum_str = value.getUnicodeString(errorCode);
int32_t setNum = parseSetNum(setNum_str, errorCode);
uhash_puti(data->localeToRuleSetNumMap, const_cast<char *>(key), setNum, &errorCode);
}
} else if (uprv_strcmp(key, "rules") == 0) {
// Allocate one more than needed to skip [0]. See comment in parseSetNum().
data->rules = new DayPeriodRules[data->maxRuleSetNum + 1];
if (data->rules == nullptr) {
errorCode = U_MEMORY_ALLOCATION_ERROR;
return;
}
ResourceTable rules = value.getTable(errorCode);
processRules(rules, key, value, errorCode);
if (U_FAILURE(errorCode)) { return; }
}
}
}
void processRules(const ResourceTable &rules, const char *key,
ResourceValue &value, UErrorCode &errorCode) {
if (U_FAILURE(errorCode)) { return; }
for (int32_t i = 0; rules.getKeyAndValue(i, key, value); ++i) {
ruleSetNum = parseSetNum(key, errorCode);
ResourceTable ruleSet = value.getTable(errorCode);
if (U_FAILURE(errorCode)) { return; }
for (int32_t j = 0; ruleSet.getKeyAndValue(j, key, value); ++j) {
period = DayPeriodRules::getDayPeriodFromString(key);
if (period == DayPeriodRules::DAYPERIOD_UNKNOWN) {
errorCode = U_INVALID_FORMAT_ERROR;
return;
}
ResourceTable periodDefinition = value.getTable(errorCode);
if (U_FAILURE(errorCode)) { return; }
for (int32_t k = 0; periodDefinition.getKeyAndValue(k, key, value); ++k) {
if (value.getType() == URES_STRING) {
// Key-value pairs (e.g. before{6:00}).
CutoffType type = getCutoffTypeFromString(key);
addCutoff(type, value.getUnicodeString(errorCode), errorCode);
if (U_FAILURE(errorCode)) { return; }
} else {
// Arrays (e.g. before{6:00, 24:00}).
cutoffType = getCutoffTypeFromString(key);
ResourceArray cutoffArray = value.getArray(errorCode);
if (U_FAILURE(errorCode)) { return; }
int32_t length = cutoffArray.getSize();
for (int32_t l = 0; l < length; ++l) {
cutoffArray.getValue(l, value);
addCutoff(cutoffType, value.getUnicodeString(errorCode), errorCode);
if (U_FAILURE(errorCode)) { return; }
}
}
}
setDayPeriodForHoursFromCutoffs(errorCode);
for (int32_t k = 0; k < UPRV_LENGTHOF(cutoffs); ++k) {
cutoffs[k] = 0;
}
}
if (!data->rules[ruleSetNum].allHoursAreSet()) {
errorCode = U_INVALID_FORMAT_ERROR;
return;
}
}
}
// Members.
int32_t cutoffs[25]; // [0] thru [24]: 24 is allowed in "before 24".
// "Path" to data.
int32_t ruleSetNum;
DayPeriodRules::DayPeriod period;
CutoffType cutoffType;
// Helpers.
static int32_t parseSetNum(const UnicodeString &setNumStr, UErrorCode &errorCode) {
CharString cs;
cs.appendInvariantChars(setNumStr, errorCode);
return parseSetNum(cs.data(), errorCode);
}
static int32_t parseSetNum(const char *setNumStr, UErrorCode &errorCode) {
if (U_FAILURE(errorCode)) { return -1; }
if (uprv_strncmp(setNumStr, "set", 3) != 0) {
errorCode = U_INVALID_FORMAT_ERROR;
return -1;
}
int32_t i = 3;
int32_t setNum = 0;
while (setNumStr[i] != 0) {
int32_t digit = setNumStr[i] - '0';
if (digit < 0 || 9 < digit) {
errorCode = U_INVALID_FORMAT_ERROR;
return -1;
}
setNum = 10 * setNum + digit;
++i;
}
// Rule set number must not be zero. (0 is used to indicate "not found" by hashmap.)
// Currently ICU data conveniently starts numbering rule sets from 1.
if (setNum == 0) {
errorCode = U_INVALID_FORMAT_ERROR;
return -1;
} else {
return setNum;
}
}
void addCutoff(CutoffType type, const UnicodeString &hour_str, UErrorCode &errorCode) {
if (U_FAILURE(errorCode)) { return; }
if (type == CUTOFF_TYPE_UNKNOWN) {
errorCode = U_INVALID_FORMAT_ERROR;
return;
}
int32_t hour = parseHour(hour_str, errorCode);
if (U_FAILURE(errorCode)) { return; }
cutoffs[hour] |= 1 << type;
}
// Translate the cutoffs[] array to day period rules.
void setDayPeriodForHoursFromCutoffs(UErrorCode &errorCode) {
DayPeriodRules &rule = data->rules[ruleSetNum];
for (int32_t startHour = 0; startHour <= 24; ++startHour) {
// AT cutoffs must be either midnight or noon.
if (cutoffs[startHour] & (1 << CUTOFF_TYPE_AT)) {
if (startHour == 0 && period == DayPeriodRules::DAYPERIOD_MIDNIGHT) {
rule.fHasMidnight = true;
} else if (startHour == 12 && period == DayPeriodRules::DAYPERIOD_NOON) {
rule.fHasNoon = true;
} else {
errorCode = U_INVALID_FORMAT_ERROR; // Bad data.
return;
}
}
// FROM/AFTER and BEFORE must come in a pair.
if (cutoffs[startHour] & (1 << CUTOFF_TYPE_FROM) ||
cutoffs[startHour] & (1 << CUTOFF_TYPE_AFTER)) {
for (int32_t hour = startHour + 1;; ++hour) {
if (hour == startHour) {
// We've gone around the array once and can't find a BEFORE.
errorCode = U_INVALID_FORMAT_ERROR;
return;
}
if (hour == 25) { hour = 0; }
if (cutoffs[hour] & (1 << CUTOFF_TYPE_BEFORE)) {
rule.add(startHour, hour, period);
break;
}
}
}
}
}
// Translate "before" to CUTOFF_TYPE_BEFORE, for example.
static CutoffType getCutoffTypeFromString(const char *type_str) {
if (uprv_strcmp(type_str, "from") == 0) {
return CUTOFF_TYPE_FROM;
} else if (uprv_strcmp(type_str, "before") == 0) {
return CUTOFF_TYPE_BEFORE;
} else if (uprv_strcmp(type_str, "after") == 0) {
return CUTOFF_TYPE_AFTER;
} else if (uprv_strcmp(type_str, "at") == 0) {
return CUTOFF_TYPE_AT;
} else {
return CUTOFF_TYPE_UNKNOWN;
}
}
// Gets the numerical value of the hour from the Unicode string.
static int32_t parseHour(const UnicodeString &time, UErrorCode &errorCode) {
if (U_FAILURE(errorCode)) {
return 0;
}
int32_t hourLimit = time.length() - 3;
// `time` must look like "x:00" or "xx:00".
// If length is wrong or `time` doesn't end with ":00", error out.
if ((hourLimit != 1 && hourLimit != 2) ||
time[hourLimit] != 0x3A || time[hourLimit + 1] != 0x30 ||
time[hourLimit + 2] != 0x30) {
errorCode = U_INVALID_FORMAT_ERROR;
return 0;
}
// If `time` doesn't begin with a number in [0, 24], error out.
// Note: "24:00" is possible in "before 24:00".
int32_t hour = time[0] - 0x30;
if (hour < 0 || 9 < hour) {
errorCode = U_INVALID_FORMAT_ERROR;
return 0;
}
if (hourLimit == 2) {
int32_t hourDigit2 = time[1] - 0x30;
if (hourDigit2 < 0 || 9 < hourDigit2) {
errorCode = U_INVALID_FORMAT_ERROR;
return 0;
}
hour = hour * 10 + hourDigit2;
if (hour > 24) {
errorCode = U_INVALID_FORMAT_ERROR;
return 0;
}
}
return hour;
}
}; // struct DayPeriodRulesDataSink
struct DayPeriodRulesCountSink : public ResourceSink {
virtual ~DayPeriodRulesCountSink();
virtual void put(const char *key, ResourceValue &value, UBool, UErrorCode &errorCode) override {
ResourceTable rules = value.getTable(errorCode);
if (U_FAILURE(errorCode)) { return; }
for (int32_t i = 0; rules.getKeyAndValue(i, key, value); ++i) {
int32_t setNum = DayPeriodRulesDataSink::parseSetNum(key, errorCode);
if (setNum > data->maxRuleSetNum) {
data->maxRuleSetNum = setNum;
}
}
}
};
// Out-of-line virtual destructors.
DayPeriodRulesDataSink::~DayPeriodRulesDataSink() {}
DayPeriodRulesCountSink::~DayPeriodRulesCountSink() {}
namespace {
UInitOnce initOnce {};
U_CFUNC UBool U_CALLCONV dayPeriodRulesCleanup() {
delete[] data->rules;
uhash_close(data->localeToRuleSetNumMap);
delete data;
data = nullptr;
return true;
}
} // namespace
void U_CALLCONV DayPeriodRules::load(UErrorCode &errorCode) {
if (U_FAILURE(errorCode)) {
return;
}
data = new DayPeriodRulesData();
data->localeToRuleSetNumMap = uhash_open(uhash_hashChars, uhash_compareChars, nullptr, &errorCode);
LocalUResourceBundlePointer rb_dayPeriods(ures_openDirect(nullptr, "dayPeriods", &errorCode));
// Get the largest rule set number (so we allocate enough objects).
DayPeriodRulesCountSink countSink;
ures_getAllItemsWithFallback(rb_dayPeriods.getAlias(), "rules", countSink, errorCode);
// Populate rules.
DayPeriodRulesDataSink sink;
ures_getAllItemsWithFallback(rb_dayPeriods.getAlias(), "", sink, errorCode);
ucln_i18n_registerCleanup(UCLN_I18N_DAYPERIODRULES, dayPeriodRulesCleanup);
}
const DayPeriodRules *DayPeriodRules::getInstance(const Locale &locale, UErrorCode &errorCode) {
umtx_initOnce(initOnce, DayPeriodRules::load, errorCode);
// If the entire day period rules data doesn't conform to spec (even if the part we want
// does), return nullptr.
if(U_FAILURE(errorCode)) { return nullptr; }
const char *localeCode = locale.getBaseName();
char name[ULOC_FULLNAME_CAPACITY];
char parentName[ULOC_FULLNAME_CAPACITY];
if (uprv_strlen(localeCode) < ULOC_FULLNAME_CAPACITY) {
uprv_strcpy(name, localeCode);
// Treat empty string as root.
if (*name == '\0') {
uprv_strcpy(name, "root");
}
} else {
errorCode = U_BUFFER_OVERFLOW_ERROR;
return nullptr;
}
int32_t ruleSetNum = 0; // NB there is no rule set 0 and 0 is returned upon lookup failure.
while (*name != '\0') {
ruleSetNum = uhash_geti(data->localeToRuleSetNumMap, name);
if (ruleSetNum == 0) {
// name and parentName can't be the same pointer, so fill in parent then copy to child.
uloc_getParent(name, parentName, ULOC_FULLNAME_CAPACITY, &errorCode);
if (*parentName == '\0') {
// Saves a lookup in the hash table.
break;
}
uprv_strcpy(name, parentName);
} else {
break;
}
}
if (ruleSetNum <= 0 || data->rules[ruleSetNum].getDayPeriodForHour(0) == DAYPERIOD_UNKNOWN) {
// If day period for hour 0 is UNKNOWN then day period for all hours are UNKNOWN.
// Data doesn't exist even with fallback.
return nullptr;
} else {
return &data->rules[ruleSetNum];
}
}
DayPeriodRules::DayPeriodRules() : fHasMidnight(false), fHasNoon(false) {
for (int32_t i = 0; i < 24; ++i) {
fDayPeriodForHour[i] = DayPeriodRules::DAYPERIOD_UNKNOWN;
}
}
double DayPeriodRules::getMidPointForDayPeriod(
DayPeriodRules::DayPeriod dayPeriod, UErrorCode &errorCode) const {
if (U_FAILURE(errorCode)) { return -1; }
int32_t startHour = getStartHourForDayPeriod(dayPeriod, errorCode);
int32_t endHour = getEndHourForDayPeriod(dayPeriod, errorCode);
// Can't obtain startHour or endHour; bail out.
if (U_FAILURE(errorCode)) { return -1; }
double midPoint = (startHour + endHour) / 2.0;
if (startHour > endHour) {
// dayPeriod wraps around midnight. Shift midPoint by 12 hours, in the direction that
// lands it in [0, 24).
midPoint += 12;
if (midPoint >= 24) {
midPoint -= 24;
}
}
return midPoint;
}
int32_t DayPeriodRules::getStartHourForDayPeriod(
DayPeriodRules::DayPeriod dayPeriod, UErrorCode &errorCode) const {
if (U_FAILURE(errorCode)) { return -1; }
if (dayPeriod == DAYPERIOD_MIDNIGHT) { return 0; }
if (dayPeriod == DAYPERIOD_NOON) { return 12; }
if (fDayPeriodForHour[0] == dayPeriod && fDayPeriodForHour[23] == dayPeriod) {
// dayPeriod wraps around midnight. Start hour is later than end hour.
for (int32_t i = 22; i >= 1; --i) {
if (fDayPeriodForHour[i] != dayPeriod) {
return (i + 1);
}
}
} else {
for (int32_t i = 0; i <= 23; ++i) {
if (fDayPeriodForHour[i] == dayPeriod) {
return i;
}
}
}
// dayPeriod doesn't exist in rule set; set error and exit.
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
return -1;
}
int32_t DayPeriodRules::getEndHourForDayPeriod(
DayPeriodRules::DayPeriod dayPeriod, UErrorCode &errorCode) const {
if (U_FAILURE(errorCode)) { return -1; }
if (dayPeriod == DAYPERIOD_MIDNIGHT) { return 0; }
if (dayPeriod == DAYPERIOD_NOON) { return 12; }
if (fDayPeriodForHour[0] == dayPeriod && fDayPeriodForHour[23] == dayPeriod) {
// dayPeriod wraps around midnight. End hour is before start hour.
for (int32_t i = 1; i <= 22; ++i) {
if (fDayPeriodForHour[i] != dayPeriod) {
// i o'clock is when a new period starts, therefore when the old period ends.
return i;
}
}
} else {
for (int32_t i = 23; i >= 0; --i) {
if (fDayPeriodForHour[i] == dayPeriod) {
return (i + 1);
}
}
}
// dayPeriod doesn't exist in rule set; set error and exit.
errorCode = U_ILLEGAL_ARGUMENT_ERROR;
return -1;
}
DayPeriodRules::DayPeriod DayPeriodRules::getDayPeriodFromString(const char *type_str) {
if (uprv_strcmp(type_str, "midnight") == 0) {
return DAYPERIOD_MIDNIGHT;
} else if (uprv_strcmp(type_str, "noon") == 0) {
return DAYPERIOD_NOON;
} else if (uprv_strcmp(type_str, "morning1") == 0) {
return DAYPERIOD_MORNING1;
} else if (uprv_strcmp(type_str, "afternoon1") == 0) {
return DAYPERIOD_AFTERNOON1;
} else if (uprv_strcmp(type_str, "evening1") == 0) {
return DAYPERIOD_EVENING1;
} else if (uprv_strcmp(type_str, "night1") == 0) {
return DAYPERIOD_NIGHT1;
} else if (uprv_strcmp(type_str, "morning2") == 0) {
return DAYPERIOD_MORNING2;
} else if (uprv_strcmp(type_str, "afternoon2") == 0) {
return DAYPERIOD_AFTERNOON2;
} else if (uprv_strcmp(type_str, "evening2") == 0) {
return DAYPERIOD_EVENING2;
} else if (uprv_strcmp(type_str, "night2") == 0) {
return DAYPERIOD_NIGHT2;
} else if (uprv_strcmp(type_str, "am") == 0) {
return DAYPERIOD_AM;
} else if (uprv_strcmp(type_str, "pm") == 0) {
return DAYPERIOD_PM;
} else {
return DAYPERIOD_UNKNOWN;
}
}
void DayPeriodRules::add(int32_t startHour, int32_t limitHour, DayPeriod period) {
for (int32_t i = startHour; i != limitHour; ++i) {
if (i == 24) { i = 0; }
fDayPeriodForHour[i] = period;
}
}
UBool DayPeriodRules::allHoursAreSet() {
for (int32_t i = 0; i < 24; ++i) {
if (fDayPeriodForHour[i] == DAYPERIOD_UNKNOWN) { return false; }
}
return true;
}
U_NAMESPACE_END