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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibCore/ArgsParser.h>
#include <stdio.h>
#include <time.h>
const int line_width = 70;
const int line_count = 8;
const int column_width = 22;
char print_buffer[line_width * line_count];
char temp_buffer[line_width * 8];
int target_year;
int target_month;
int target_day;
int current_year;
int current_month;
int day_of_week(int day, int month, int year)
{
static const int seek_table[] = { 0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4 };
if (month < 3)
--year;
return (year + year / 4 - year / 100 + year / 400 + seek_table[month - 1] + day) % 7;
}
int get_number_of_days(int month, int year)
{
bool is_leap_year = ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0));
bool is_long_month = (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12);
if (month == 2)
return is_leap_year ? 29 : 28;
return is_long_month ? 31 : 30;
}
void append_to_print(char* buffer, int row, int column, char* text)
{
int starting_point = (line_width * row) + (column * column_width);
for (int i = 0; text[i] != '\0'; i++) {
buffer[starting_point + i] = text[i];
}
}
void insert_month_to_print(int column, int month, int year)
{
int printing_column = column;
int printing_row = 0;
// FIXME: Both the month name and month header text should be provided by a locale
sprintf(temp_buffer, " %02u - %04u ", month, year);
append_to_print(print_buffer, printing_row, printing_column, temp_buffer);
printing_row++;
sprintf(temp_buffer, "Su Mo Tu We Th Fr Sa");
append_to_print(print_buffer, printing_row, printing_column, temp_buffer);
printing_row++;
int day_to_print = 1;
int first_day_of_week_for_month = day_of_week(1, month, year);
int days_in_the_month = get_number_of_days(month, year);
int last_written_chars = 0;
for (int i = 1; day_to_print <= days_in_the_month; ++i) {
if (i - 1 < first_day_of_week_for_month) {
last_written_chars += sprintf(temp_buffer + last_written_chars, " ");
} else {
if (year == current_year && month == current_month && target_day == day_to_print) {
// FIXME: To replicate Unix cal it would be better to use "\x1b[30;47m%2d\x1b[0m " in here instead of *.
// However, doing that messes up the layout.
last_written_chars += sprintf(temp_buffer + last_written_chars, "%2d*", day_to_print);
} else {
last_written_chars += sprintf(temp_buffer + last_written_chars, "%2d ", day_to_print);
}
day_to_print++;
}
append_to_print(print_buffer, printing_row, printing_column, temp_buffer);
if (i % 7 == 0) {
printing_row++;
memset(temp_buffer, ' ', line_width * 8);
temp_buffer[line_width * 8 - 1] = '\0';
last_written_chars = 0;
}
}
}
void clean_buffers()
{
for (int i = 1; i < line_width * line_count; ++i) {
print_buffer[i - 1] = i % line_width == 0 ? '\n' : ' ';
}
print_buffer[line_width * line_count - 1] = '\0';
for (int i = 0; i < line_width; ++i) {
temp_buffer[i] = ' ';
}
temp_buffer[line_width - 1] = '\0';
}
int main(int argc, char** argv)
{
int day = 0;
int month = 0;
int year = 0;
Core::ArgsParser args_parser;
// FIXME: This should ensure two values get parsed as month + year
args_parser.add_positional_argument(day, "Day of year", "day", Core::ArgsParser::Required::No);
args_parser.add_positional_argument(month, "Month", "month", Core::ArgsParser::Required::No);
args_parser.add_positional_argument(year, "Year", "year", Core::ArgsParser::Required::No);
args_parser.parse(argc, argv);
time_t now = time(nullptr);
auto* tm = localtime(&now);
// Hack: workaround two values parsing as day + month.
if (day && month && !year) {
year = month;
month = day;
day = 0;
}
bool year_mode = !day && !month && year;
if (!year)
year = tm->tm_year + 1900;
if (!month)
month = tm->tm_mon + 1;
if (!day)
day = tm->tm_mday;
current_year = year;
current_month = month;
clean_buffers();
if (year_mode) {
printf(" ");
printf("Year %4d", year);
printf(" \n\n");
for (int i = 1; i < 12; ++i) {
insert_month_to_print(0, i++, year);
insert_month_to_print(1, i++, year);
insert_month_to_print(2, i, year);
printf(print_buffer);
printf("\n");
clean_buffers();
}
} else {
insert_month_to_print(0, month, year);
printf(print_buffer);
printf("\n\n");
clean_buffers();
}
return 0;
}
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