add: split

src/str/split.c

@@ -0,0 +1,54 @@
+#include "str.h"
+
+static void free_tab(char **tab)
+{
+	for (size_t i = 0; tab[i] != NULL; i++)
+		free(tab);
+	free(tab);
+}
+
+static ssize_t fill_tab(const char *str, const char *delimiter, char **tab)
+{
+	size_t len = 0;
+	size_t delimiter_len = strlen(delimiter);
+	const char* tmp = str;
+	const char* next;
+
+	while (tmp != NULL)
+	{
+		while (strcmp(tmp, delimiter) == 0)
+			tmp += delimiter_len;
+		next = strstr(tmp, delimiter);
+		if (tab != NULL)
+		{
+			if (next == NULL)
+				tab[len] = strndup(tmp, strlen(tmp));
+			else
+				tab[len] = strndup(tmp, next - tmp);
+			if (tab[len] == NULL)
+			{
+				free_tab(tab);
+				return (-1);
+			}
+		}
+		len++;
+		tmp = next;
+	}
+	if (tab != NULL)
+		tab[len] = NULL;
+	return (len);
+}
+
+char **split(const char *str, const char *delimiter)
+{
+	ssize_t len;
+	char **tab;
+
+	len = fill_tab(str, delimiter, NULL);
+	tab = malloc((len + 1) * sizeof(char *));
+	if (tab == NULL)
+		return (NULL);
+	if (fill_tab(str, delimiter, tab) == -1)
+		return (NULL);
+	return (tab);
+}

src/str/str.h

@@ -0,0 +1,6 @@
+#pragma once
+#include <stddef.h>
+#include <string.h>
+#include <stdlib.h>
+
+char **split(const char *str, const char *delimiter);