1 files changed, 143 insertions, 0 deletions
diff --git a/directory.c b/directory.c
new file mode 100644
index 0000000..12c3ec0
--- /dev/null
+++ b/directory.c
@@ -0,0 +1,143 @@
+/*  Copyright 1995 David C. Niemi
+ *  Copyright 1996-2002,2008,2009 Alain Knaff.
+ *  This file is part of mtools.
+ *
+ *  Mtools is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Mtools is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Mtools.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "sysincludes.h"
+#include "msdos.h"
+#include "stream.h"
+#include "mtools.h"
+#include "file.h"
+#include "fs.h"
+#include "file_name.h"
+
+/* #define DEBUG */
+
+/*
+ * Read a directory entry into caller supplied buffer
+ */
+struct directory *dir_read(direntry_t *entry, int *error)
+{
+	int n;
+	*error = 0;
+	if((n=force_read(entry->Dir, (char *) (&entry->dir), 
+			 (mt_off_t) entry->entry * MDIR_SIZE, 
+			 MDIR_SIZE)) != MDIR_SIZE) {
+		if (n < 0) {
+			*error = -1;
+		}
+		return NULL;
+	}
+	return &entry->dir;
+}
+
+/*
+ * Make a subdirectory grow in length.  Only subdirectories (not root)
+ * may grow.  Returns a 0 on success, 1 on failure (disk full), or -1
+ * on error.
+ */
+
+int dir_grow(Stream_t *Dir, int size)
+{
+	Stream_t *Stream = GetFs(Dir);
+	DeclareThis(FsPublic_t);
+	int ret;
+	int buflen;
+	char *buffer;
+	
+	if (!getfreeMinClusters(Dir, 1))
+		return -1;
+
+	buflen = This->cluster_size * This->sector_size;
+
+	if(! (buffer=malloc(buflen)) ){
+		perror("dir_grow: malloc");
+		return -1;
+	}
+		
+	memset((char *) buffer, '\0', buflen);
+	ret = force_write(Dir, buffer, (mt_off_t) size * MDIR_SIZE, buflen);
+	free(buffer);
+	if(ret < buflen)
+		return -1;
+	return 0;
+}
+
+
+void low_level_dir_write(direntry_t *entry)
+{
+	force_write(entry->Dir, 
+		    (char *) (&entry->dir), 
+		    (mt_off_t) entry->entry * MDIR_SIZE, MDIR_SIZE);
+}
+
+void low_level_dir_write_end(Stream_t *Dir, int entry)
+{
+	char zero = ENDMARK;
+	force_write(Dir, &zero, (mt_off_t) entry * MDIR_SIZE, 1);
+}
+
+/*
+ * Make a directory entry.  Builds a directory entry based on the
+ * name, attribute, starting cluster number, and size.  Returns a pointer
+ * to a static directory structure.
+ */
+
+struct directory *mk_entry(const dos_name_t *dn, char attr,
+			   unsigned int fat, size_t size, time_t date,
+			   struct directory *ndir)
+{
+	struct tm *now;
+	time_t date2 = date;
+	unsigned char hour, min_hi, min_low, sec;
+	unsigned char year, month_hi, month_low, day;
+
+	now = localtime(&date2);
+	dosnameToDirentry(dn, ndir);
+	ndir->attr = attr;
+	ndir->ctime_ms = 0;
+	hour = now->tm_hour << 3;
+	min_hi = now->tm_min >> 3;
+	min_low = now->tm_min << 5;
+	sec = now->tm_sec / 2;
+	ndir->ctime[1] = ndir->time[1] = hour + min_hi;
+	ndir->ctime[0] = ndir->time[0] = min_low + sec;
+	year = (now->tm_year - 80) << 1;
+	month_hi = (now->tm_mon + 1) >> 3;
+	month_low = (now->tm_mon + 1) << 5;
+	day = now->tm_mday;
+	ndir -> adate[1] = ndir->cdate[1] = ndir->date[1] = year + month_hi;
+	ndir -> adate[0] = ndir->cdate[0] = ndir->date[0] = month_low + day;
+
+	set_word(ndir->start, fat & 0xffff);
+	set_word(ndir->startHi, fat >> 16);
+	set_dword(ndir->size, size);
+	return ndir;
+}
+
+/*
+ * Make a directory entry from base name. This is supposed to be used
+ * from places such as mmd for making special entries (".", "..", "/", ...)
+ * Thus it doesn't bother with character set conversions
+ */
+struct directory *mk_entry_from_base(const char *base, char attr,
+				     unsigned int fat, size_t size, time_t date,
+				     struct directory *ndir)
+{
+	struct dos_name_t dn;
+	strncpy(dn.base, base, 8);
+	strncpy(dn.ext, "   ", 3);
+	return mk_entry(&dn, attr, fat, size, date, ndir);
+}