diff options
Diffstat (limited to 'libft/src/str/ft_atoi_strict.c')
| -rw-r--r-- | libft/src/str/ft_atoi_strict.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libft/src/str/ft_atoi_strict.c b/libft/src/str/ft_atoi_strict.c new file mode 100644 index 0000000..8be4c4b --- /dev/null +++ b/libft/src/str/ft_atoi_strict.c @@ -0,0 +1,38 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* ft_strict_atoi.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: cacharle <marvin@42.fr> +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2020/01/15 10:06:29 by cacharle #+# #+# */ +/* Updated: 2020/02/14 02:46:43 by cacharle ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include "libft.h" + +int ft_atoi_strict(const char *s) +{ + char *end; + long ret; + + if (*s != '-' && !ft_isdigit(*s)) + { + errno = EINVAL; + return (0); + } + errno = 0; + ret = ft_strtol(s, &end, 10); + if (errno == ERANGE || ret > INT_MAX || ret < INT_MIN) + { + errno = ERANGE; + return (0); + } + if (*end != '\0') + { + errno = EINVAL; + return (0); + } + return (ret); +} |