From 4aeba6d2f03706fa21281709a138a7d3ea9797dc Mon Sep 17 00:00:00 2001
From: Charles <sircharlesaze@gmail.com>
Date: Sun, 5 Apr 2020 15:04:23 +0200
Subject: Preprocessing (glob and iterpolation) draft (not tested)

---
 src/glob.c | 162 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 src/glob.c

(limited to 'src/glob.c')

diff --git a/src/glob.c b/src/glob.c
new file mode 100644
index 0000000..2d544da
--- /dev/null
+++ b/src/glob.c
@@ -0,0 +1,162 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   glob.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: charles <charles.cabergs@gmail.com>        +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/04/05 11:44:07 by charles           #+#    #+#             */
+/*   Updated: 2020/04/05 13:21:25 by charles          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "ms_glob.h"
+
+/*
+** \brief    Match vector start size
+** \note     From ~: average file in directory is 8
+**           From /: average file in directory is 15
+*/
+
+#define MATCHES_VEC_START_SIZE 16
+
+/*
+** \brief                 Glob directory iteration function
+**                        for subdirectory matches
+** \param dirname         Current directory name
+** \param entry           Current directory entry
+** \param param           Contain matches vector and pattern to match
+** \param subdir_pattern  Pattern left after '/' in parrent pattern
+** \return                0 on success, -1 on error
+*/
+
+static int		glob_iter_subdir(
+	char *dirname,
+	struct dirent *entry,
+	struct s_glob_param *param,
+	char *subdir_pattern
+)
+{
+	char	subdir_name[PATH_MAX];
+	t_ftvec	*subdir_matches;
+	size_t	i;
+
+	ft_strcat3(ft_strcpy(subdir_name, dirname), "/", entry->d_name);
+	chdir(subdir_name);
+	subdir_matches = glob_matches(subdir_pattern);
+	chdir(dirname);
+	if (subdir_matches == NULL)
+		return (-1);
+	i = 0;
+	while (i < subdir_matches->size)
+		if (ft_vecpush_safe(param->matches, ft_strjoin3(entry->d_name,
+						"/", subdir_matches->data[i++])) == NULL)
+		{
+			ft_vecdestroy(subdir_matches, free);
+			return (-1);
+		}
+	ft_vecdestroy(subdir_matches, free);
+	subdir_pattern[-1] = '/';
+	return (0);
+}
+
+/*
+** \brief          Glob directory iteration function
+** \param dirname  Current directory name
+** \param entry    Current directory entry
+** \param param    Contain matches vector and pattern to match
+** \return         0 on success or -1 on error
+*/
+
+static int		glob_iter(
+	char *dirname,
+	struct dirent *entry,
+	struct s_glob_param *param
+)
+{
+	char	*subdir_pattern;
+
+	if (param->pattern[0] != '.' && entry->d_name[0] == '.')
+		return (0);
+	if ((subdir_pattern = ft_strchr(param->pattern, '/')) != NULL)
+		*subdir_pattern++ = '\0';
+	if (!ft_fnmatch(param->pattern, entry->d_name))
+	{
+		if (subdir_pattern != NULL)
+			subdir_pattern[-1] = '/';
+		return (0);
+	}
+	if (subdir_pattern != NULL)
+	{
+		if (entry->d_type != DT_DIR)
+		{
+			subdir_pattern[-1] = '/';
+			return (0);
+		}
+		return (glob_iter_subdir(dirname, entry, param, subdir_pattern));
+	}
+	if (ft_vecpush_safe(param->matches, ft_strdup(entry->d_name)) == NULL)
+		return (-1);
+	return (0);
+}
+
+/*
+** \brief          Fill a vector with all match
+** \param pattern  Pattern to match
+** \return         Matches vector or NULL on error
+*/
+
+t_ftvec			*glob_matches(char *pattern)
+{
+	char				dirname[PATH_MAX];
+	struct s_glob_param	param;
+
+	if (getcwd(dirname, PATH_MAX) == NULL)
+		return (NULL);
+	if ((param.pattern = ft_strdup(pattern)) == NULL ||
+		(param.matches = ft_vecnew(MATCHES_VEC_START_SIZE)) == NULL)
+	{
+		free(param.pattern);
+		return (NULL);
+	}
+	if (utils_directory_iter(dirname, &param,
+					(t_directory_iter_func)glob_iter) == -1)
+	{
+		free(param.pattern);
+		ft_vecdestroy(param.matches, free);
+		return (NULL);
+	}
+	free(param.pattern);
+	return (param.matches);
+}
+
+/*
+** \brief          Search files which match a pattern in the current directory
+** \param pattern  Pattern to match
+** \return         Space separated list of match,
+**                 pattern if no match found,
+**                 NULL on error
+*/
+
+char			*ms_glob(char *pattern)
+{
+	char	*join;
+	t_ftvec	*matches;
+
+	if ((matches = glob_matches(pattern)) == NULL)
+		return (NULL);
+	ft_vecsort(matches, ft_compar_str);
+	if (ft_vecpush(matches, NULL) == NULL ||
+		(join = ft_strsjoin((char**)matches->data, "\n")) == NULL)
+	{
+		ft_vecdestroy(matches, free);
+		return (NULL);
+	}
+	ft_vecdestroy(matches, free);
+	if (*join == '\0')
+	{
+		free(join);
+		return (ft_strdup(pattern));
+	}
+	return (join);
+}
-- 
cgit