First commitHEADmain

1 files changed, 43 insertions, 0 deletions

diff --git a/lib/ft_atoi.c b/lib/ft_atoi.c
new file mode 100755
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--- /dev/null
+++ b/lib/ft_atoi.c
@@ -0,0 +1,43 @@
+/*
+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/>.
+*/
+
+int	ft_atoi(const char *nptr)
+{
+	int	i;
+	int	tmp;
+	int	nbl;
+
+	i = 0;
+	nbl = 0;
+	while (nptr[i] == 32 || (nptr[i] >= 7 && nptr[i] <= 13))
+		i++;
+	tmp = 1;
+	if (nptr[i] == '-')
+	{
+		i++;
+		tmp *= -1;
+	}
+	else if (nptr[i] == '+')
+		i++;
+	while (nptr[i] >= 48 && nptr[i] <= 57)
+	{
+		nbl = (nbl * 10) + nptr[i] - 48;
+		i++;
+	}
+	return (tmp * nbl);
+}
+