feat: added string struct in libft.h

hdrs/libft.h

@@ -3,7 +3,15 @@
 
 # include <stdlib.h>
 
+typedef struct s_string
+{
+    size_t len;
+    char *data;
+} t_string;
+
 int     ft_strcmp(const char *s1, const char *s2);
+size_t  ft_strlen(const char *s);
+int     ft_putstr(const char *s);
 int     ft_islower(int c);
 int     ft_isupper(int c);
 int     ft_tolower(int c);
@@ -18,5 +26,12 @@ void    *ft_memcpy(void *dst, const void *src, size_t n);
 void    *ft_memcpy32(void *dst, const void *src, size_t n);
 void    *ft_memcpy64(void *dst, const void *src, size_t n);
 int     ft_atoi(const char *str);
+int     ft_putchar(char c);
+int     ft_putnbr(int n);
+int     ft_putunbr(unsigned int n);
+int     ft_puthex(unsigned int n, int uppercase);
+void    ft_putptr(void *ptr);
+int	    ft_printf(const char *format, ...);
+int     ft_putaddr(unsigned long n);
 
 #endif

srcs/ft_printf.c

@@ -0,0 +1,45 @@
+#include "libft.h"
+#include <stdarg.h>
+#include <stdint.h>
+
+static int	ft_print_format(const char *fmt, va_list args)
+{
+	if (*fmt == 'c')
+		return (ft_putchar(va_arg(args, int)));
+	else if (*fmt == 's')
+		return (ft_putstr(va_arg(args, char *)));
+	else if (*fmt == 'p')
+		return (ft_putaddr((uintptr_t)va_arg(args, void *)));
+	else if (*fmt == 'd' || *fmt == 'i')
+		return (ft_putnbr(va_arg(args, int)));
+	else if (*fmt == 'u')
+		return (ft_putunbr(va_arg(args, unsigned int)));
+	else if (*fmt == 'x')
+		return (ft_puthex(va_arg(args, unsigned int), 0));
+	else if (*fmt == 'X')
+		return (ft_puthex(va_arg(args, unsigned int), 1));
+	else if (*fmt == '%')
+		return (ft_putchar('%'));
+	return (0);
+}
+
+int	ft_printf(const char *format, ...)
+{
+	va_list	args;
+	int		i = 0;
+	int		count = 0;
+
+	va_start(args, format);
+	while (format[i])
+	{
+		if (format[i] == '%' && format[i + 1])
+		{
+			count += ft_print_format(&format[++i], args);
+		}
+		else
+			count += ft_putchar(format[i]);
+		i++;
+	}
+	va_end(args);
+	return (count);
+}

srcs/ft_putaddr.c

@@ -0,0 +1,12 @@
+#include "libft.h"
+
+int ft_putaddr(unsigned long n)
+{
+    int count = 0;
+    char *digits = "0123456789abcdef";
+
+    if (n >= 16)
+        count += ft_putaddr(n / 16);
+    count += ft_putchar(digits[n % 16]);
+    return count;
+}

srcs/ft_putchar.c

@@ -0,0 +1,8 @@
+#include "libft.h"
+#include <unistd.h>
+
+int ft_putchar(char c)
+{
+    write(1, &c, 1);
+    return 1;
+}

srcs/ft_puthex.c

@@ -0,0 +1,12 @@
+#include "libft.h" // for ft_putchar
+
+int ft_puthex(unsigned int n, int uppercase)
+{
+    int count = 0;
+    char *digits = uppercase ? "0123456789ABCDEF" : "0123456789abcdef";
+
+    if (n >= 16)
+        count += ft_puthex(n / 16, uppercase);
+    count += ft_putchar(digits[n % 16]);
+    return count;
+}

srcs/ft_putnbr.c

@@ -0,0 +1,21 @@
+#include "libft.h"
+#include <unistd.h>
+
+int ft_putnbr(int n)
+{
+    int count = 0;
+    char c;
+
+    if (n == -2147483648)
+        return write(1, "-2147483648", 11);
+    if (n < 0)
+    {
+        count += ft_putchar('-');
+        n = -n;
+    }
+    if (n >= 10)
+        count += ft_putnbr(n / 10);
+    c = '0' + (n % 10);
+    count += ft_putchar(c);
+    return count;
+}

srcs/ft_putstr.c

@@ -0,0 +1,12 @@
+#include "libft.h"
+#include <unistd.h>
+
+int ft_putstr(const char *s)
+{
+    int len = 0;
+    if (!s)
+        return write(1, "(null)", 6);
+    while (s[len])
+        write(1, &s[len++], 1);
+    return len;
+}

srcs/ft_putunbr.c

@@ -0,0 +1,14 @@
+#include "libft.h"
+#include <unistd.h>
+
+int ft_putunbr(unsigned int n)
+{
+    int count = 0;
+    char c;
+
+    if (n >= 10)
+        count += ft_putunbr(n / 10);
+    c = '0' + (n % 10);
+    count += ft_putchar(c);
+    return count;
+}