commit a4838511ebb1ac7396eee54d4c8a51fe13a3c4b4
Author: Camille Chauvet <cchauvet@1C3.42angouleme.fr>
Date:   Tue Oct 3 15:09:24 2023 +0000

    ex00: init: work but some value qre not right maybe upperbound

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..ca2e5f7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+*
+!/**/
+!*.*
+!/**/Makefile
+*.o
diff --git a/ex00/Makefile b/ex00/Makefile
new file mode 100644
index 0000000..47ad482
--- /dev/null
+++ b/ex00/Makefile
@@ -0,0 +1,26 @@
+CXX := c++
+CXXFLAGS := -std=c++98 -Wall -Wextra -Werror -g
+SRCDIR := src
+OBJDIR := obj
+NAME := ex00
+
+SRCS := $(wildcard $(SRCDIR)/*.cpp)
+OBJS := $(patsubst $(SRCDIR)/%.cpp,$(OBJDIR)/%.o,$(SRCS))
+
+all: $(NAME)
+
+$(OBJDIR)/%.o: $(SRCDIR)/%.cpp
+	mkdir -p obj
+	$(CXX) $(CXXFLAGS) -c $< -o $@
+
+$(NAME): $(OBJS)
+	$(CXX) $(CXXFLAGS) $^ -o $@
+
+clean:
+	rm -rf $(OBJDIR)
+
+fclean: clean
+	rm -fr $(NAME)
+
+re: fclean
+	@make --no-print-directory all
diff --git a/ex00/src/BitcoinExchange.cpp b/ex00/src/BitcoinExchange.cpp
new file mode 100644
index 0000000..4d7f92d
--- /dev/null
+++ b/ex00/src/BitcoinExchange.cpp
@@ -0,0 +1,209 @@
+#include <asm-generic/errno-base.h>
+#include <cerrno>
+#include <cstddef>
+#include <fstream>
+#include <iostream>
+#include <iomanip>
+#include <sstream>
+#include <string>
+#include <map>
+#include <regex.h>
+#include <cstdlib>
+
+#include "BitcoinExchange.hpp"
+
+static bool is_leap(int year)
+{
+	return (((year % 4 == 0) && 
+         (year % 100 != 0)) ||
+         (year % 400 == 0));
+}
+  
+static bool date_is_valid(int d, int m, int y)
+{
+    return false;
+    if (m < 1 || m > 12)
+		return false;
+    if (d < 1 || d > 31)
+		return false;
+  
+    if (m == 2)
+    {
+        if (is_leap(y))
+			return (d <= 29);
+        else
+			return (d <= 28);
+    }
+  
+    if (m == 4 || m == 6 ||
+        m == 9 || m == 11)
+        return (d <= 30);
+  
+    return true;
+}
+
+static int check_date(const std::string& line, unsigned int& out)
+{
+	unsigned int year, mounth, day;
+
+	year = std::atoi(line.c_str());
+	mounth = std::atoi(line.substr(5).c_str());
+	day = std::atoi(line.substr(8).c_str());
+
+	if (date_is_valid(day, mounth, year))
+		return 1;
+	out = year * 10000 + mounth * 100 + day;
+	return 0;
+}
+
+static int check_value(const std::string& value_str, int flag, float& out)
+{
+	out = atof(value_str.c_str());
+	if (errno == ERANGE)
+	{
+		std::cout << "Error: too large a number." << std::endl;
+		errno = 0;
+		return 1;
+	}
+	if (flag == INPUT && out > 1000)
+	{
+		std::cout << "Error: too large a number." << std::endl;
+		return 1;
+	}
+	if (out < 0)
+	{
+		std::cout << "Error: not a positive number." << std::endl;
+		return 1;
+	}
+	return 0;
+}
+
+static int check_line(const std::string& line, regex_t& reegex, const std::string& delimiter, int flag, std::pair<unsigned int, float>& out)
+{
+	if (line == "date,exchange_rate")
+		return 1;
+	if (regexec(&reegex, line.c_str(), 0, NULL, 0) == REG_NOMATCH)
+	{
+		std::cout << "bad input => " << line << std::endl;
+		return 1;
+	}
+	unsigned int date;
+	if (check_date(line, date))
+		return 1;
+
+	float value;
+	if (check_value(line.substr(10 + delimiter.length()), flag, value))
+		return 1;
+	
+	out.first = date;
+	out.second = value;
+
+	return 0;
+}
+
+static int get_data(std::map<unsigned int, float>& out)
+{
+	std::ifstream file("data.csv");
+
+	if (!file.good())
+	{
+		std::cout << "error: file: " << "data.csv" << std::endl;
+		return 1;
+	}
+
+	regex_t reegex;
+
+	if (regcomp(&reegex, DATA_PATERN, REG_EXTENDED))
+	{
+		std::cout << "regex compilation fail" << std::endl;
+		return 1;
+	}
+
+	std::string line;
+	std::pair<unsigned int, float> line_parsed;
+	
+	while (std::getline(file, line))
+		if (!check_line(line, reegex, ",", DATABASE, line_parsed))
+			out[line_parsed.first] = line_parsed.second;
+	
+	regfree(&reegex);
+	
+	return 0;
+}
+
+std::string utodate(unsigned int u)
+{
+	std::stringstream ss;
+
+	ss << u / 10000
+		<< "-"
+		<< std::setfill('0') << std::setw(2) << (u % 10000) / 100
+		<< "-"
+		<< std::setfill('0') << std::setw(2) << u % 100;
+
+	return ss.str();
+}
+
+static int get_input(const std::string& file_path, const std::map<unsigned int, float>& database)
+{
+	std::ifstream file(file_path.c_str());
+
+	if (!file.good())
+	{
+		std::cout << "error: file: " << "file_path.csv" << std::endl;
+		return 1;
+	}
+
+	regex_t reegex;
+
+	if (regcomp(&reegex, INPUT_PATERN, REG_EXTENDED))
+	{
+		std::cout << "regex compilation fail" << std::endl;
+		return 1;
+	}
+
+	std::string line;
+	std::pair<unsigned int, float> line_parsed;
+	
+	while (std::getline(file, line))
+	{
+		if (!check_line(line, reegex, " | ", INPUT, line_parsed))
+		{
+			std::map<unsigned int, float>::const_iterator it = database.upper_bound(line_parsed.first);
+			if (it->first < line_parsed.first)
+				std::cout << "Error: bad input => " << utodate(line_parsed.first) << std::endl;
+			else
+				std::cout << utodate(line_parsed.first)
+					<< " => " << line_parsed.second
+					<< " = " << line_parsed.second * it->second << std::endl;
+		}
+	}
+	
+	regfree(&reegex);
+	
+	return 0;
+}
+
+unsigned int get_price(const std::string& file_path)
+{
+	static bool db_init = 0;
+	static std::map<unsigned int, float> database;
+
+	if (db_init == 0)
+		get_data(database);
+
+	get_input(file_path, database);
+
+	return 0;
+}
+
+int main(int ac, char** av)
+{
+	if (ac != 2)
+	{
+		std::cout << "error: missing file" << std::endl;
+		return 1;
+	}
+	get_price(std::string(av[1]));
+	return 0;
+}
diff --git a/ex00/src/BitcoinExchange.hpp b/ex00/src/BitcoinExchange.hpp
new file mode 100644
index 0000000..4614fc9
--- /dev/null
+++ b/ex00/src/BitcoinExchange.hpp
@@ -0,0 +1,6 @@
+#pragma once
+
+#define INPUT_PATERN "^[0-9]{4}\\-[0-9]{2}\\-[0-9]{2} \\| [+\\-]*[0-9]*(\\.[0-9]+)?$"
+#define DATA_PATERN "^[0-9]{4}\\-[0-9]{2}\\-[0-9]{2},[+\\-]*[0-9]*(\\.[0-9]+)?$"
+#define INPUT 0
+#define DATABASE 1