Add ft_padend and ft_padstart functions

include/libft_string.h

@@ -6,7 +6,7 @@
 /*   By: gdandele <gdandele@student.s19.be>         +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/04/03 11:30:43 by gdandele          #+#    #+#             */
-/*   Updated: 2024/05/01 14:55:34 by gdandele         ###   ########.fr       */
+/*   Updated: 2024/05/05 16:00:08 by gdandele         ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -102,6 +102,34 @@ void	*ft_memmove(void *dst, const void *src, size_t len);
  */
 void	*ft_memset(void *s, int c, size_t n);
 
+/**
+ * @brief Allocates (with malloc) and pads the start of a string with a
+ * specified character. It pads the start of the string `str` with the
+ * character `c` until the length of the string is equal to `len`.
+ * If the length of the string is already greater than or equal to `len`,
+ * the function returns the original string.
+ *
+ * @param str The string to be padded.
+ * @param c The character used for padding.
+ * @param len The desired length of the padded string.
+ * @return char* The padded string or NULL if the allocation fails.
+ */
+char	*ft_padstart(char *str, char c, size_t len);
+
+/**
+ * @brief Allocates (with malloc) and pads the end of a string with a
+ * specified character. It pads the end of the string `str` with the
+ * character `c` until the length of the string is equal to `len`.
+ * If the length of the string is already greater than or equal to `len`,
+ * the function returns the original string.
+ *
+ * @param str The string to be padded.
+ * @param c The character used for padding.
+ * @param len The desired length of the padded string.
+ * @return char* The padded string or NULL if the allocation fails.
+ */
+char	*ft_padend(char *str, char c, size_t len);
+
 /**
  * @brief Allocates (with malloc) and returns an array of strings obtained by
  * splitting ’s’ using the character ’c’ as a delimiter.  The array must end

src/string/ft_padend.c

@@ -0,0 +1,30 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_padend.c                                        :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: gdandele <gdandele@student.s19.be>         +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/05/05 15:17:34 by gdandele          #+#    #+#             */
+/*   Updated: 2024/05/05 16:14:58 by gdandele         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+char	*ft_padend(char *str, char c, size_t len)
+{
+	char	*dst;
+	size_t	strlen;
+
+	strlen = ft_strlen(str);
+	if (strlen >= len)
+		return (ft_strdup(str));
+	dst = (char *) malloc(sizeof(char) * (len + 1));
+	if (!dst)
+		return (NULL);
+	ft_memset((dst + strlen), c, (len - strlen));
+	ft_memcpy(dst, str, strlen);
+	dst[len] = '\0';
+	return (dst);
+}

src/string/ft_padstart.c

@@ -0,0 +1,30 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_padstart.c                                      :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: gdandele <gdandele@student.s19.be>         +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/05/05 15:32:12 by gdandele          #+#    #+#             */
+/*   Updated: 2024/05/05 16:15:07 by gdandele         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "libft.h"
+
+char	*ft_padstart(char *str, char c, size_t len)
+{
+	char	*dst;
+	size_t	strlen;
+
+	strlen = ft_strlen(str);
+	if (strlen >= len)
+		return (ft_strdup(str));
+	dst = (char *) malloc(sizeof(char) * (len + 1));
+	if (!dst)
+		return (NULL);
+	ft_memset(dst, c, (len - strlen));
+	ft_memcpy((dst + (len - strlen)), str, strlen);
+	dst[len] = '\0';
+	return (dst);
+}

test/string/ft_padend_test.c

@@ -0,0 +1,68 @@
+#include "../test_helper.h"
+
+int main()
+{
+	int exit_code = 0;
+
+	// Test Case 1: Pad with '!' to length 10
+	char str1[] = "Hello";
+	char c1 = '!';
+	size_t len1 = 10;
+	char *result1 = ft_padend(str1, c1, len1);
+	if (result1 != NULL && strcmp(result1, "Hello!!!!!") == 0) {
+		success();
+	} else {
+		failed(&exit_code);
+	}
+	free(result1);
+
+	// Test Case 2: Pad with '0' to length 5
+	char str2[] = "123";
+	char c2 = '0';
+	size_t len2 = 5;
+	char *result2 = ft_padend(str2, c2, len2);
+	if (result2 != NULL && strcmp(result2, "12300") == 0) {
+		success();
+	} else {
+		failed(&exit_code);
+	}
+	free(result2);
+
+	// Test Case 3: Pad with ' ' to length 8
+	char str3[] = "Hello";
+	char c3 = ' ';
+	size_t len3 = 8;
+	char *result3 = ft_padend(str3, c3, len3);
+	if (result3 != NULL && strcmp(result3, "Hello   ") == 0) {
+		success();
+	} else {
+		failed(&exit_code);
+	}
+	free(result3);
+
+	// Test Case 4: Pad with '\0' to length 3
+	char str4[] = "Hello";
+	char c4 = '\0';
+	size_t len4 = 3;
+	char *result4 = ft_padend(str4, c4, len4);
+	if (result4 != NULL && strcmp(result4, "Hello") == 0) {
+		success();
+	} else {
+		failed(&exit_code);
+	}
+	free(result4);
+
+	// Test Case 5: Pad with '$' to length 0
+	char str5[] = "";
+	char c5 = '$';
+	size_t len5 = 0;
+	char *result5 = ft_padend(str5, c5, len5);
+	if (result5 != NULL && strcmp(result5, "") == 0) {
+		success();
+	} else {
+		failed(&exit_code);
+	}
+	free(result5);
+
+	return (exit_code);
+}

test/string/ft_padstart_test.c

@@ -0,0 +1,83 @@
+#include "../test_helper.h"
+
+int main()
+{
+	int exit_code = 0;
+
+	// Test Case 1: Pad with '!' to length 10
+	char str1[] = "Hello";
+	char c1 = '!';
+	size_t len1 = 10;
+	char *result1 = ft_padstart(str1, c1, len1);
+	if (result1 != NULL && strcmp(result1, "!!!!!Hello") == 0)
+	{
+		success();
+	}
+	else
+	{
+		failed(&exit_code);
+	}
+	free(result1);
+
+	// Test Case 2: Pad with '0' to length 5
+	char str2[] = "123";
+	char c2 = '0';
+	size_t len2 = 5;
+	char *result2 = ft_padstart(str2, c2, len2);
+	if (result2 != NULL && strcmp(result2, "00123") == 0)
+	{
+		success();
+	}
+	else
+	{
+		failed(&exit_code);
+	}
+	free(result2);
+
+	// Test Case 3: Pad with ' ' to length 8
+	char str3[] = "Hello";
+	char c3 = ' ';
+	size_t len3 = 8;
+	char *result3 = ft_padstart(str3, c3, len3);
+	if (result3 != NULL && strcmp(result3, "   Hello") == 0)
+	{
+		success();
+	}
+	else
+	{
+		failed(&exit_code);
+	}
+	free(result3);
+
+	// Test Case 4: Pad with '\0' to length 3
+	char str4[] = "Hello";
+	char c4 = '\0';
+	size_t len4 = 3;
+	char *result4 = ft_padstart(str4, c4, len4);
+	if (result4 != NULL && strcmp(result4, "Hello") == 0)
+	{
+		success();
+	}
+	else
+	{
+		failed(&exit_code);
+	}
+	free(result4);
+
+	// Test Case 5: Pad with '$' to length 0
+	char str5[] = "";
+	char c5 = '$';
+	size_t len5 = 0;
+	char *result5 = ft_padstart(str5, c5, len5);
+	if (result5 != NULL && strcmp(result5, "") == 0)
+	{
+		success();
+	}
+	else
+	{
+		failed(&exit_code);
+	}
+	free(result5);
+
+	return (exit_code);
+}