# 구현 | Libft

## 새롭게 정의한 함수들

libft에서 따로 설명이 필요한, 새로 정의한 함수들은 다음과 같습니다.

```cpp
int free(void *ptr);
int freeStr(char **str);
int freeDoublestr(char ***doublestr_addr);
```

댕글링 포인터를 만들지 않는 safety free를 위해 free 함수들을 만들어서 사용합니다.

```cpp
char *strsjoin(std::string s1 = "", std::string s2 = "", std::string s3 = "", std::string s4 = "", std::string s5 = "");
```

string 인자들을 합쳐 char pointer로 바꾸는 작업은 cgi 환경변수 세팅을 위해 디자인했습니다.

```cpp
std::set<std::string> stringVectorToSet(std::vector<std::string> stringVector);
std::map<std::string, std::string> stringVectorToMap(std::vector<std::string> stringVector, char sep = ':');
std::string containerToString(std::vector<unsigned char> container, std::string sep = "");
```

스플릿한 벡터를 셋이나 맵으로 변환해야 할 때가 많고, 반대로 vector, set, map을 하나의 문자열로 병합해서 사용해야 할 일들도 있습니다.

```cpp
int getline(int fd, char *line, int max_buffer_size);
int getline(std::string& data, std::string& line, size_t max_buffer_size);
int getline(std::string& data, std::string& line);
int getline(std::string& data, int& readed_size, std::string& line);
```

getline 같은 경우 시행착오를 겪는 과정에서 여러 개를 만들어서 오버로딩을 했지만, 서브젝트 요건에 맞춰 코드를 다듬다보니 1\~2개 밖에 쓰지 않았습니다.

```cpp
template <typename T, typename V>
bool hasKey(T container, V value);
```

코드를 짧게 줄이고 가독적으로 사용하기 위해 key의 존재만 확인하는 템플릿 함수를 정의했습니다.

## Libft.hpp

저희가 Mandatory part에서 사용한 libft의 헤더 파일은 다음과 같습니다.

```cpp
/* C LIBFT */
void bzero(void *data, size_t len);
void *memcpy(void *dest, const void *src, size_t len);
void *calloc(size_t size, size_t count);
char *strdup(const char *s);
int free(void *ptr);
int freeStr(char **str);
int freeDoublestr(char ***doublestr_addr);
size_t strlen(const char *s);
char *strchr(const char *s, int c);
char *strsub(char const *s, unsigned int start, size_t len);
char *strsjoin(std::string s1 = "", std::string s2 = "", std::string s3 = "", std::string s4 = "", std::string s5 = "");
int startswith(const char *str, const char *sub);
int lenDoubleStr(char **str);
size_t pow(size_t root, size_t square);
long long int abs(long long int num);
std::string to_string(long long int n);
int stoi(std::string str, size_t base = 10);
std::string itos(std::string number, size_t from, size_t to);

/* C++ LIBFT */
std::string ltrim(std::string s, std::string seps = " ");
std::string rtrim(std::string s, std::string seps = " ");
std::string trim(std::string s, std::string seps = " ");
std::string getStringFromFile(std::string file_path, int max_size = -1);
std::string getStringFromFd(int fd, int max_size = -1);
std::vector<std::string> split(std::string s, char c = '\n');
std::set<std::string> stringVectorToSet(std::vector<std::string> stringVector);
std::map<std::string, std::string> stringVectorToMap(std::vector<std::string> stringVector, char sep = ':');
std::string containerToString(std::vector<unsigned char> container, std::string sep = "");
int getline(int fd, char *line, int max_buffer_size);
int getline(std::string& data, std::string& line, size_t max_buffer_size);
int getline(std::string& data, std::string& line);
int getline(std::string& data, int& readed_size, std::string& line);
bool isFile(std::string path);
bool isDirectory(std::string path);

/* TCP function */
void convertTimespecToTm(time_t s, struct tm* t);
unsigned long ws_htonl(unsigned long x);
unsigned short ws_htons(unsigned short x);
std::string inet_ntoa(unsigned int address);

/* FD SET operator */
void fdZero(fd_set *x);
void fdSet(int fd, fd_set *x);
int fdIsset(int fd, fd_set *x);
void fdClr(int fd, fd_set *x);
std::string getSetFdString(int max_fd, fd_set* fset);

/* Log util function */
bool isRightTime(int second);
void log(int log_fd, std::string text);
std::string getTimestamp(void);
std::string getSpeed(timeval from);

/* Template function */
template <typename T, typename V>
bool hasKey(T container, V value);
template <typename T>
std::string containerToString(T container, std::string sep = " ");
```


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