From fe37597119353ce183fc404417b81bd4702f64b7 Mon Sep 17 00:00:00 2001 From: Charles Date: Fri, 17 Jan 2020 10:56:16 +0100 Subject: Splited include like src/, Adding feature toggle protection in header --- src/io/ft_get_next_line.c | 113 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 113 insertions(+) create mode 100644 src/io/ft_get_next_line.c (limited to 'src/io/ft_get_next_line.c') diff --git a/src/io/ft_get_next_line.c b/src/io/ft_get_next_line.c new file mode 100644 index 0000000..4aecf3c --- /dev/null +++ b/src/io/ft_get_next_line.c @@ -0,0 +1,113 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* get_next_line.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: cacharle +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2019/10/19 09:08:36 by cacharle #+# #+# */ +/* Updated: 2020/01/17 10:53:23 by cacharle ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include "libft.h" + +static int gnl_find_newline(char *str) +{ + int i; + + i = -1; + while (str[++i]) + if (str[i] == '\n') + return (i); + return (-1); +} + +static int gnl_free_return(char **ptr, char **ptr2, int ret) +{ + if (ptr != NULL) + { + free(*ptr); + *ptr = NULL; + } + if (ptr2 != NULL) + { + free(*ptr2); + *ptr2 = NULL; + } + return (ret); +} + +static int gnl_read_line(int fd, char **line, char *rest) +{ + int ret; + int split_at; + char *buf; + + if ((buf = malloc(sizeof(char) * (GNL_BUFFER_SIZE + 1))) == NULL) + return (gnl_free_return(line, NULL, GNL_STATUS_ERROR)); + while ((ret = read(fd, buf, GNL_BUFFER_SIZE)) > 0) + { + buf[ret] = '\0'; + if ((split_at = gnl_find_newline(buf)) != -1) + { + ft_strcpy(rest, buf + split_at + 1); + buf[split_at] = '\0'; + if ((*line = ft_strjoin_free(*line, buf, 1)) == NULL) + return (gnl_free_return(&buf, NULL, GNL_STATUS_ERROR)); + return (gnl_free_return(&buf, NULL, GNL_STATUS_LINE)); + } + if ((*line = ft_strjoin_free(*line, buf, 1)) == NULL) + return (gnl_free_return(&buf, NULL, GNL_STATUS_ERROR)); + } + if (ret == -1) + return (gnl_free_return(&buf, line, GNL_STATUS_ERROR)); + return (gnl_free_return(&buf, NULL, ret)); +} + +/* +** if has rest: +** if rest has newline: +** push rest until newline in line, shift rest +** return LINE_READ +** else: +** push rest in line +** +** while can read fd in buf +** if buf has newline: +** push buf until newline in line +** push buf after newline in rest +** return LINE_READ +** push buf in line +** +** return GNL_EOF +*/ + +int get_next_line(int fd, char **line) +{ + int split_at; + static char rest[OPEN_MAX][GNL_BUFFER_SIZE + 1] = {{0}}; + + if (fd < 0 || fd > OPEN_MAX || line == NULL || GNL_BUFFER_SIZE <= 0) + return (GNL_STATUS_ERROR); + if ((*line = ft_strdup("")) == NULL) + return (GNL_STATUS_ERROR); + if (rest[fd][0] == '\0') + return (gnl_read_line(fd, line, rest[fd])); + if ((split_at = gnl_find_newline(rest[fd])) != -1) + { + free(*line); + if ((*line = (char*)malloc(sizeof(char) * (split_at + 1))) == NULL) + return (GNL_STATUS_ERROR); + ft_strncpy(*line, rest[fd], split_at); + (*line)[split_at] = '\0'; + ft_strcpy(rest[fd], rest[fd] + split_at + 1); + return (GNL_STATUS_LINE); + } + free(*line); + if (!(*line = (char*)malloc(sizeof(char) * (ft_strlen(rest[fd]) + 1)))) + return (GNL_STATUS_ERROR); + ft_strcpy(*line, rest[fd]); + rest[fd][0] = '\0'; + return (gnl_read_line(fd, line, rest[fd])); +} -- cgit