len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2025-12-08 20:55:17 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

Reduce the amount of stack space needed by fat_rename and mkdir_uncached.

Browse source 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28576 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Sparmann 2010-11-13 15:41:18 +00:00
parent 47bbd6a466
commit 79d26ed7f9
2 changed files with 29 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

25
firmware/common/dir_uncached.c
View file

@ -204,13 +204,28 @@ int mkdir_uncached(const char *name)
char *basename;
char *parent;
struct dirent_uncached *entry;
struct fat_dir newdir;
int dd;
DIR_UNCACHED* pdir = opendirs;
struct fat_dir *newdir;
int rc;
if ( name[0] != '/' ) {
DEBUGF("mkdir: Only absolute paths supported right now\n");
return -1;
}
/* find a free dir descriptor */
for ( dd=0; dd<MAX_OPEN_DIRS; dd++, pdir++)
if ( !pdir->busy )
break;
if ( dd == MAX_OPEN_DIRS ) {
DEBUGF("Too many dirs open\n");
errno = EMFILE;
return -5;
}
pdir->busy = true;
newdir = &pdir->fatdir;
strlcpy(namecopy, name, sizeof(namecopy));
@ -230,11 +245,13 @@ int mkdir_uncached(const char *name)
if(!dir) {
DEBUGF("mkdir: can't open parent dir\n");
pdir->busy = false;
return -2;
}
if(basename[0] == 0) {
DEBUGF("mkdir: Empty dir name\n");
pdir->busy = false;
errno = EINVAL;
return -3;
}
@ -245,14 +262,16 @@ int mkdir_uncached(const char *name)
DEBUGF("mkdir error: file exists\n");
errno = EEXIST;
closedir_uncached(dir);
pdir->busy = false;
return - 4;
}
}
memset(&newdir, 0, sizeof(struct fat_dir));
memset(newdir, 0, sizeof(struct fat_dir));
rc = fat_create_dir(basename, &newdir, &(dir->fatdir));
rc = fat_create_dir(basename, newdir, &(dir->fatdir));
closedir_uncached(dir);
pdir->busy = false;
return rc;
}

20
firmware/drivers/fat.c
View file

@ -1967,7 +1967,7 @@ int fat_rename(struct fat_file* file,
int attr)
{
int rc;
struct fat_dir olddir;
struct fat_file olddir_file;
struct fat_file newfile = *file;
unsigned char* entry = NULL;
unsigned short* clusptr = NULL;
@ -1988,11 +1988,6 @@ int fat_rename(struct fat_file* file,
return -2;
}
/* create a temporary file handle */
rc = fat_opendir(IF_MV2(file->volume,) &olddir, file->dircluster, NULL);
if (rc < 0)
return rc * 10 - 1;
/* create new name */
rc = add_dir_entry(dir, &newfile, newname, false, false);
if (rc < 0)
@ -2016,18 +2011,17 @@ int fat_rename(struct fat_file* file,
it points to its parent directory (we don't check if it was a move) */
if(FAT_ATTR_DIRECTORY == attr) {
unsigned char buf[SECTOR_SIZE];
/* open the dir that was renamed, we re-use the olddir struct */
rc = fat_opendir(IF_MV2(file->volume,) &olddir, newfile.firstcluster,
NULL);
/* open the dir that was renamed, we re-use the olddir_file struct */
rc = fat_open(IF_MV2(volume,) newfile.firstcluster, &olddir_file, NULL);
if (rc < 0)
return rc * 10 - 6;
/* get the first sector of the dir */
rc = fat_seek(&olddir.file, 0);
rc = fat_seek(&olddir_file, 0);
if (rc < 0)
return rc * 10 - 7;
rc = fat_readwrite(&olddir.file, 1, buf, false);
rc = fat_readwrite(&olddir_file, 1, buf, false);
if (rc < 0)
return rc * 10 - 8;
@ -2051,11 +2045,11 @@ int fat_rename(struct fat_file* file,
*clusptr = htole16(parentcluster & 0xffff);
/* write back this sector */
rc = fat_seek(&olddir.file, 0);
rc = fat_seek(&olddir_file, 0);
if (rc < 0)
return rc * 10 - 7;
rc = fat_readwrite(&olddir.file, 1, buf, true);
rc = fat_readwrite(&olddir_file, 1, buf, true);
if (rc < 1)
return rc * 10 - 8;
}