summaryrefslogtreecommitdiff
path: root/fs/fdos/subdir.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/fdos/subdir.c')
-rw-r--r--fs/fdos/subdir.c270
1 files changed, 135 insertions, 135 deletions
diff --git a/fs/fdos/subdir.c b/fs/fdos/subdir.c
index 5911f2e88..97b25047a 100644
--- a/fs/fdos/subdir.c
+++ b/fs/fdos/subdir.c
@@ -38,11 +38,11 @@ static unsigned char cache [SZ_STD_SECTOR];
#define min(x,y) ((x)<(y)?(x):(y))
static int descend (Slot_t *parent,
- Fs_t *fs,
- char *path);
+ Fs_t *fs,
+ char *path);
/*-----------------------------------------------------------------------------
- * init_subdir --
+ * init_subdir --
*-----------------------------------------------------------------------------
*/
void init_subdir (void)
@@ -50,7 +50,7 @@ void init_subdir (void)
cache_sect = -1;
}
/*-----------------------------------------------------------------------------
- * basename --
+ * basename --
*-----------------------------------------------------------------------------
*/
char *basename (char *name)
@@ -58,32 +58,32 @@ char *basename (char *name)
register char *cptr;
if (!name || !*name) {
- return ("");
+ return ("");
}
-
+
for (cptr= name; *cptr++; );
while (--cptr >= name) {
if (*cptr == '/') {
- return (cptr + 1);
+ return (cptr + 1);
}
}
return(name);
}
/*-----------------------------------------------------------------------------
- * root_map --
+ * root_map --
*-----------------------------------------------------------------------------
*/
static int root_map (Fs_t *fs, Slot_t *file, int where, int *len)
{
*len = min (*len, fs -> dir_len * SZ_STD_SECTOR - where);
if (*len < 0 ) {
- *len = 0;
- return (-1);
+ *len = 0;
+ return (-1);
}
return fs -> dir_start * SZ_STD_SECTOR + where;
}
/*-----------------------------------------------------------------------------
- * normal_map --
+ * normal_map --
*-----------------------------------------------------------------------------
*/
static int normal_map (Fs_t *fs, Slot_t *file, int where, int *len)
@@ -102,60 +102,60 @@ static int normal_map (Fs_t *fs, Slot_t *file, int where, int *len)
*len = min (*len, file -> FileSize - where);
if (*len < 0 ) {
- *len = 0;
- return (0);
+ *len = 0;
+ return (0);
}
if (file -> FirstAbsCluNr < 2){
- *len = 0;
- return (0);
+ *len = 0;
+ return (0);
}
RelCluNr = where / clus_size;
-
+
if (RelCluNr >= file -> PreviousRelCluNr){
- CurCluNr = file -> PreviousRelCluNr;
- AbsCluNr = file -> PreviousAbsCluNr;
+ CurCluNr = file -> PreviousRelCluNr;
+ AbsCluNr = file -> PreviousAbsCluNr;
} else {
- CurCluNr = 0;
- AbsCluNr = file -> FirstAbsCluNr;
+ CurCluNr = 0;
+ AbsCluNr = file -> FirstAbsCluNr;
}
NrClu = (offset + *len - 1) / clus_size;
while (CurCluNr <= RelCluNr + NrClu) {
- if (CurCluNr == RelCluNr){
- /* we have reached the beginning of our zone. Save
- * coordinates */
- file -> PreviousRelCluNr = RelCluNr;
- file -> PreviousAbsCluNr = AbsCluNr;
- }
- NewCluNr = fat_decode (fs, AbsCluNr);
- if (NewCluNr == 1 || NewCluNr == 0) {
- PRINTF("Fat problem while decoding %d %x\n",
- AbsCluNr, NewCluNr);
- return (-1);
- }
- if (CurCluNr == RelCluNr + NrClu) {
- break;
- }
+ if (CurCluNr == RelCluNr){
+ /* we have reached the beginning of our zone. Save
+ * coordinates */
+ file -> PreviousRelCluNr = RelCluNr;
+ file -> PreviousAbsCluNr = AbsCluNr;
+ }
+ NewCluNr = fat_decode (fs, AbsCluNr);
+ if (NewCluNr == 1 || NewCluNr == 0) {
+ PRINTF("Fat problem while decoding %d %x\n",
+ AbsCluNr, NewCluNr);
+ return (-1);
+ }
+ if (CurCluNr == RelCluNr + NrClu) {
+ break;
+ }
- if (CurCluNr < RelCluNr && NewCluNr == FAT12_END) {
- *len = 0;
- return 0;
- }
+ if (CurCluNr < RelCluNr && NewCluNr == FAT12_END) {
+ *len = 0;
+ return 0;
+ }
- if (CurCluNr >= RelCluNr && NewCluNr != AbsCluNr + 1)
- break;
- CurCluNr++;
- AbsCluNr = NewCluNr;
+ if (CurCluNr >= RelCluNr && NewCluNr != AbsCluNr + 1)
+ break;
+ CurCluNr++;
+ AbsCluNr = NewCluNr;
}
*len = min (*len, (1 + CurCluNr - RelCluNr) * clus_size - offset);
return (((file -> PreviousAbsCluNr - 2) * fs -> cluster_size +
- fs -> dir_start + fs -> dir_len) *
- SZ_STD_SECTOR + offset);
+ fs -> dir_start + fs -> dir_len) *
+ SZ_STD_SECTOR + offset);
}
/*-----------------------------------------------------------------------------
* open_subdir -- open the subdir containing the file
@@ -166,13 +166,13 @@ int open_subdir (File_t *desc)
char *pathname;
char *tmp, *s, *path;
char terminator;
-
+
if ((pathname = (char *)malloc (MAX_PATH)) == NULL) {
- return (-1);
+ return (-1);
}
-
+
strcpy (pathname, desc -> name);
-
+
/* Suppress file name */
tmp = basename (pathname);
*tmp = '\0';
@@ -182,68 +182,68 @@ int open_subdir (File_t *desc)
desc -> subdir.FileSize = -1;
desc -> subdir.map = root_map;
desc -> subdir.dir.attr = ATTR_DIRECTORY;
-
+
tmp = pathname;
for (s = tmp; ; ++s) {
- if (*s == '/' || *s == '\0') {
- path = tmp;
- terminator = *s;
- *s = '\0';
- if (s != tmp && strcmp (path,".")) {
- if (descend (&desc -> subdir, desc -> fs, path) < 0) {
- free (pathname);
- return (-1);
- }
- }
- if (terminator == 0) {
- break;
- }
- tmp = s + 1;
- }
+ if (*s == '/' || *s == '\0') {
+ path = tmp;
+ terminator = *s;
+ *s = '\0';
+ if (s != tmp && strcmp (path,".")) {
+ if (descend (&desc -> subdir, desc -> fs, path) < 0) {
+ free (pathname);
+ return (-1);
+ }
+ }
+ if (terminator == 0) {
+ break;
+ }
+ tmp = s + 1;
+ }
}
free (pathname);
return (0);
}
/*-----------------------------------------------------------------------------
- * descend --
+ * descend --
*-----------------------------------------------------------------------------
*/
static int descend (Slot_t *parent,
- Fs_t *fs,
- char *path)
+ Fs_t *fs,
+ char *path)
{
int entry;
Slot_t SubDir;
if(path[0] == '\0' || strcmp (path, ".") == 0) {
- return (0);
+ return (0);
}
-
+
entry = 0;
if (vfat_lookup (parent,
- fs,
- &(SubDir.dir),
- &entry,
- 0,
- path,
- ACCEPT_DIR | SINGLE | DO_OPEN,
- 0,
- &SubDir) == 0) {
- *parent = SubDir;
- return (0);
+ fs,
+ &(SubDir.dir),
+ &entry,
+ 0,
+ path,
+ ACCEPT_DIR | SINGLE | DO_OPEN,
+ 0,
+ &SubDir) == 0) {
+ *parent = SubDir;
+ return (0);
}
if (strcmp(path, "..") == 0) {
- parent -> FileSize = -1;
- parent -> FirstAbsCluNr = 0;
- parent -> map = root_map;
- return (0);
+ parent -> FileSize = -1;
+ parent -> FirstAbsCluNr = 0;
+ parent -> map = root_map;
+ return (0);
}
return (-1);
}
/*-----------------------------------------------------------------------------
- * open_file --
+ * open_file --
*-----------------------------------------------------------------------------
*/
int open_file (Slot_t *file, Directory_t *dir)
@@ -255,17 +255,17 @@ int open_file (Slot_t *file, Directory_t *dir)
if(first == 0 &&
(dir -> attr & ATTR_DIRECTORY) != 0) {
- file -> FirstAbsCluNr = 0;
- file -> FileSize = -1;
- file -> map = root_map;
- return (0);
+ file -> FirstAbsCluNr = 0;
+ file -> FileSize = -1;
+ file -> map = root_map;
+ return (0);
}
-
+
if ((dir -> attr & ATTR_DIRECTORY) != 0) {
- size = (1UL << 31) - 1;
+ size = (1UL << 31) - 1;
}
else {
- size = __le32_to_cpu (dir -> size);
+ size = __le32_to_cpu (dir -> size);
}
file -> map = normal_map;
@@ -275,73 +275,73 @@ int open_file (Slot_t *file, Directory_t *dir)
return (0);
}
/*-----------------------------------------------------------------------------
- * read_file --
+ * read_file --
*-----------------------------------------------------------------------------
*/
int read_file (Fs_t *fs,
- Slot_t *file,
- char *buf,
- int where,
- int len)
+ Slot_t *file,
+ char *buf,
+ int where,
+ int len)
{
int pos;
int read, nb, sect, offset;
-
+
pos = file -> map (fs, file, where, &len);
if (pos < 0) {
- return -1;
+ return -1;
}
if (len == 0) {
- return (0);
+ return (0);
}
/* Compute sector number */
sect = pos / SZ_STD_SECTOR;
offset = pos % SZ_STD_SECTOR;
read = 0;
-
+
if (offset) {
- /* Read doesn't start at the sector beginning. We need to use our */
- /* cache */
- if (sect != cache_sect) {
- if (dev_read (cache, sect, 1) < 0) {
- return (-1);
- }
- cache_sect = sect;
- }
- nb = min (len, SZ_STD_SECTOR - offset);
-
- memcpy (buf, cache + offset, nb);
- read += nb;
- len -= nb;
- sect += 1;
+ /* Read doesn't start at the sector beginning. We need to use our */
+ /* cache */
+ if (sect != cache_sect) {
+ if (dev_read (cache, sect, 1) < 0) {
+ return (-1);
+ }
+ cache_sect = sect;
+ }
+ nb = min (len, SZ_STD_SECTOR - offset);
+
+ memcpy (buf, cache + offset, nb);
+ read += nb;
+ len -= nb;
+ sect += 1;
}
if (len > SZ_STD_SECTOR) {
- nb = (len - 1) / SZ_STD_SECTOR;
- if (dev_read (buf + read, sect, nb) < 0) {
- return ((read) ? read : -1);
- }
- /* update sector position */
- sect += nb;
+ nb = (len - 1) / SZ_STD_SECTOR;
+ if (dev_read (buf + read, sect, nb) < 0) {
+ return ((read) ? read : -1);
+ }
+ /* update sector position */
+ sect += nb;
- /* Update byte position */
- nb *= SZ_STD_SECTOR;
- read += nb;
- len -= nb;
+ /* Update byte position */
+ nb *= SZ_STD_SECTOR;
+ read += nb;
+ len -= nb;
}
if (len) {
- if (sect != cache_sect) {
- if (dev_read (cache, sect, 1) < 0) {
- return ((read) ? read : -1);
- cache_sect = -1;
- }
- cache_sect = sect;
- }
-
- memcpy (buf + read, cache, len);
- read += len;
+ if (sect != cache_sect) {
+ if (dev_read (cache, sect, 1) < 0) {
+ return ((read) ? read : -1);
+ cache_sect = -1;
+ }
+ cache_sect = sect;
+ }
+
+ memcpy (buf + read, cache, len);
+ read += len;
}
return (read);
}
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-10-31 09:01:28 +0000