io: add lots of directory and path manipulation functions

io/sys/darwin/path.c

@@ -1,4 +1,4 @@
-#include "status.h"
+#include "posix.h"
 
 #include <blue/core/stringstream.h>
 #include <blue/io/file.h>
@@ -216,27 +216,65 @@ enum b_status b_path_stat(const b_path *path, struct b_file_info *out)
 
 	memset(out, 0x0, sizeof *out);
 
-	out->length = st.st_size;
+	return b_file_info_from_stat(&st, out);
+}
 
-	if (S_ISREG(st.st_flags)) {
-		out->attrib |= B_FILE_ATTRIB_NORMAL;
+enum b_status b_path_unlink(const b_path *path)
+{
+	int err = unlink(b_string_ptr(path->pathstr));
+	return err == 0 ? B_SUCCESS : b_status_from_errno(errno, B_ERR_IO_FAILURE);
+}
+
+enum b_status b_path_get_directory(
+	const struct b_path *path, struct b_path **out_dir_path)
+{
+	struct b_string *path_str = path->pathstr;
+	long len = b_string_get_size(path_str, B_STRLEN_NORMAL);
+
+	const char *path_cstr = b_string_ptr(path_str);
+	char *sep = strrchr(path_cstr, '/');
+
+	if (!sep) {
+		*out_dir_path = b_path_create();
+		return B_SUCCESS;
 	}
 
-	if (S_ISDIR(st.st_flags)) {
-		out->attrib |= B_FILE_ATTRIB_DIRECTORY;
+	size_t dir_path_len = (size_t)(sep - path_cstr);
+	struct b_string *dir_path_s = b_string_substr(path_str, 0, dir_path_len);
+
+	struct b_path *dir_path
+		= b_path_create_from_cstr(b_string_ptr(dir_path_s));
+	b_string_release(dir_path_s);
+
+	*out_dir_path = dir_path;
+
+	return B_SUCCESS;
+}
+
+enum b_status b_path_get_filename(
+	const struct b_path *path, struct b_string *out_name)
+{
+	struct b_string *path_str = path->pathstr;
+	long len = b_string_get_size(path_str, B_STRLEN_NORMAL);
+
+	char *sep = strrchr(b_string_ptr(path_str), '/');
+
+	if (!sep) {
+		b_string_append_s(out_name, path_str);
+		return B_SUCCESS;
 	}
 
-	if (S_ISBLK(st.st_flags)) {
-		out->attrib |= B_FILE_ATTRIB_BLOCK_DEVICE;
+	const char *filename = sep;
+	while (*filename == '/' && *filename != '\0') {
+		filename++;
 	}
 
-	if (S_ISCHR(st.st_flags)) {
-		out->attrib |= B_FILE_ATTRIB_CHAR_DEVICE;
+	if (*filename == '\0') {
+		b_string_clear(out_name);
+		return B_SUCCESS;
 	}
 
-	if (S_ISLNK(st.st_flags)) {
-		out->attrib |= B_FILE_ATTRIB_SYMLINK;
-	}
+	b_string_append_cstr(out_name, filename);
 
 	return B_SUCCESS;
 }