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Update Cron.h #27

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Update Cron.h #27

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77 changes: 47 additions & 30 deletions Cron.h
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Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,7 @@
#include <sstream>
#include <vector>
#include <iterator>
#include <algorithm>

namespace Bosma {
using Clock = std::chrono::system_clock;
Expand All @@ -25,43 +26,59 @@ namespace Bosma {
};

inline void
verify_and_set(const std::string &token, const std::string &expression, int &field, const int lower_bound,
verify_and_set(const std::string &token, const std::string &expression, int field[], int size, const int lower_bound,
const int upper_bound, const bool adjust = false) {
if (token == "*")
field = -1;
else {
try {
field = std::stoi(token);
} catch (const std::invalid_argument &) {
throw BadCronExpression("malformed cron string (`" + token + "` not an integer or *): " + expression);
} catch (const std::out_of_range &) {
throw BadCronExpression("malformed cron string (`" + token + "` not convertable to int): " + expression);
}
if (field < lower_bound || field > upper_bound) {
std::ostringstream oss;
oss << "malformed cron string ('" << token << "' must be <= " << upper_bound << " and >= " << lower_bound
<< "): " << expression;
throw BadCronExpression(oss.str());
if (token != "*"){
try {
int i = 0;
std::istringstream iss(token);
std::string word;
while (getline(iss, word, ','))
{
if (i >= size)
throw std::out_of_range("Invalid setsize param");
field[i] = std::stoi(word);
if (adjust) field[i]--;
if (field[i] < lower_bound || field[i] > upper_bound)
{
std::ostringstream oss;
oss << "malformed cron string ('" << token << "' must be <= " << upper_bound << " and >= " << lower_bound
<< "): " << expression;
throw BadCronExpression(oss.str());
}
i++;
}
if (adjust)
field--;
}
catch (const std::invalid_argument &)
{
throw BadCronExpression("malformed cron string (`" + token + "` not an integer or *): " + expression);
}
catch (const std::out_of_range &)
{
throw BadCronExpression("malformed cron string (`" + token + "` not convertable to int): " + expression);
}
}
}

class Cron {
public:
explicit Cron(const std::string &expression) {
std::fill_n(minute, 60, -1);
std::fill_n(hour, 24, -1);
std::fill_n(day, 31, -1);
std::fill_n(month, 12, -1);
std::fill_n(day_of_week, 7, -1);
std::istringstream iss(expression);
std::vector<std::string> tokens{std::istream_iterator<std::string>{iss},
std::istream_iterator<std::string>{}};

if (tokens.size() != 5) throw BadCronExpression("malformed cron string (must be 5 fields): " + expression);

verify_and_set(tokens[0], expression, minute, 0, 59);
verify_and_set(tokens[1], expression, hour, 0, 23);
verify_and_set(tokens[2], expression, day, 1, 31);
verify_and_set(tokens[3], expression, month, 1, 12, true);
verify_and_set(tokens[4], expression, day_of_week, 0, 6);
verify_and_set(tokens[0], expression, minute, 60, 0, 59);
verify_and_set(tokens[1], expression, hour, 24, 0, 23);
verify_and_set(tokens[2], expression, day, 31, 1, 31);
verify_and_set(tokens[3], expression, month, 12, 1, 12, true);
verify_and_set(tokens[4], expression, day_of_week, 7, 0, 6);
}

// http://stackoverflow.com/a/322058/1284550
Expand All @@ -73,7 +90,7 @@ namespace Bosma {
next.tm_sec = 0;
add(next, std::chrono::minutes(1));
while (true) {
if (month != -1 && next.tm_mon != month) {
if (std::count(month, month+12, -1) < 12 && std::find(month, month+12, next.tm_mon) - month >= 12){
// add a month
// if this will bring us over a year, increment the year instead and reset the month
if (next.tm_mon + 1 > 11) {
Expand All @@ -87,24 +104,24 @@ namespace Bosma {
next.tm_min = 0;
continue;
}
if (day != -1 && next.tm_mday != day) {
if (std::count(day, day+31, -1) < 31 && std::find(day, day+31, next.tm_mday) - day >= 31){
add(next, std::chrono::hours(24));
next.tm_hour = 0;
next.tm_min = 0;
continue;
}
if (day_of_week != -1 && next.tm_wday != day_of_week) {
if (std::count(day_of_week, day_of_week+7, -1) < 7 && std::find(day_of_week, day_of_week+7, next.tm_wday) - day_of_week >= 7) {
add(next, std::chrono::hours(24));
next.tm_hour = 0;
next.tm_min = 0;
continue;
}
if (hour != -1 && next.tm_hour != hour) {
if (std::count(hour, hour + 24, -1) < 24 && std::find(hour, hour+24, next.tm_hour) - hour >= 24) {
add(next, std::chrono::hours(1));
next.tm_min = 0;
continue;
}
if (minute != -1 && next.tm_min != minute) {
if (std::count(minute, minute+60, -1) < 60 && std::find(minute, minute+60, next.tm_min) - minute >= 60){
add(next, std::chrono::minutes(1));
continue;
}
Expand All @@ -116,6 +133,6 @@ namespace Bosma {
return Clock::from_time_t(std::mktime(&next));
}

int minute, hour, day, month, day_of_week;
int minute[60], hour[24], day[31], month[12], day_of_week[7];
};
}
}