1 files changed, 68 insertions, 0 deletions
diff --git a/ft_strmapi.c b/ft_strmapi.c
new file mode 100644
index 0000000..a7d5c54
--- /dev/null
+++ b/ft_strmapi.c
@@ -0,0 +1,68 @@
+/*
+Libft Copyright (C) 2026 yctct
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+#include "libft.h"
+
+char	*ft_strmapi(char const *s, char (*f)(unsigned int, char))
+{
+	int		i;
+	char	*newstring;
+
+	newstring = malloc(sizeof(char) * (ft_strlen(s) + 1));
+	if (!newstring)
+		return (NULL);
+	i = 0;
+	while (s[i])
+	{
+		newstring[i] = f(i, s[i]);
+		i++;
+	}
+	newstring[i] = '\0';
+	return (newstring);
+}
+
+/*
+
+#include <stdio.h>
+
+char	addOne(unsigned int i, char c)
+{
+	return (i + c);
+}
+
+int	main(void)
+{
+		char * s = ft_strmapi("1234", addOne);
+	printf("%s\n", s);
+	free(s);
+		s = ft_strmapi("", addOne);
+	printf("%s\n", s);
+	free(s);
+		return (0);
+}
+char	tmp(unsigned int i, char c)
+{
+	i = 0;
+	return(ft_toupper(c));
+}
+int	main(void)
+{
+	char	s[] = "abc";
+
+	printf("%s\n", ft_strmapi(s, tmp));
+}
+*/