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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ms_glob.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/04/05 11:44:07 by charles #+# #+# */
/* Updated: 2020/06/12 11:51:41 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, ¶m,
(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, " ")) == NULL)
{
ft_vecdestroy(matches, free);
return (NULL);
}
ft_vecdestroy(matches, free);
if (*join == '\0')
{
free(join);
return (ft_strdup(pattern));
}
return (join);
}
/*
** \brief Wrapper around `ms_glob` which free `pattern` for convinience
*/
char *ms_globf(char *pattern)
{
char *ret;
ret = ms_glob(pattern);
free(pattern);
return (ret);
}
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