electro
/
c-fat16
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

function to create a directory

Browse Source
master
Ondřej Hruška 9 years ago
parent 927488414a
commit 9b61123c20
5 changed files with 297 additions and 181 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 2
      Makefile
  2. 346
      fat16.c
  3. 71
      fat16.h
  4. 59
      main.c
  5. BIN
      test

2
Makefile
Unescape View File

@ -1,7 +1,7 @@
all: main
main: main.c
gcc -std=gnu99 main.c fat16.c -o test -g
gcc -Wall -std=gnu99 main.c fat16.c -o test -g
run: main
./test

346
fat16.c
Unescape View File

@ -57,16 +57,16 @@ uint16_t read_fat(const FAT16* fat, const uint16_t cluster);
/** Find absolute address of first boot sector. Returns 0 on failure. */
uint32_t find_bs(const BLOCKDEV* dev)
{
// Reference structure:
// Reference structure:
//
// typedef struct __attribute__((packed)) {
// uint8_t first_byte;
// uint8_t start_chs[3];
// uint8_t partition_type;
// uint8_t end_chs[3];
// uint32_t start_sector;
// uint32_t length_sectors;
// } PartitionTable;
// typedef struct __attribute__((packed)) {
// uint8_t first_byte;
// uint8_t start_chs[3];
// uint8_t partition_type;
// uint8_t end_chs[3];
// uint32_t start_sector;
// uint32_t length_sectors;
// } PartitionTable;
uint16_t addr = 0x1BE + 4; // fourth byte of structure is the type.
uint32_t tmp = 0;
@ -121,7 +121,8 @@ void read_bs(const BLOCKDEV* dev, Fat16BootSector* info, const uint32_t addr)
if (info->total_sectors == 0)
{
dev->load(&(info->total_sectors), 4);
} else
}
else
{
dev->rseek(4); // tsl
}
@ -236,19 +237,18 @@ bool append_cluster(const FAT16* fat, const uint16_t clu)
void free_cluster_chain(const FAT16* fat, uint16_t clu)
{
do {
do
{
// get address of the next cluster
const uint16_t clu2 = read_fat(fat, clu);
// mark cluster as unused
write_fat(fat, clu, 0x0000);
printf("Cluster free at %d\n", clu);
// advance
clu = clu2;
} while (clu != 0xFFFF);
}
while (clu != 0xFFFF);
}
@ -258,7 +258,8 @@ void free_cluster_chain(const FAT16* fat, uint16_t clu)
*/
bool dir_contains_file_raw(FAT16_FILE* dir, char* fname)
{
do {
do
{
bool diff = false;
for (uint8_t i = 0; i < 11; i++)
{
@ -271,7 +272,8 @@ bool dir_contains_file_raw(FAT16_FILE* dir, char* fname)
if (!diff) return true;
} while (fat16_next(dir));
}
while (fat16_next(dir));
return false;
}
@ -290,7 +292,8 @@ void open_file(const FAT16* fat, FAT16_FILE* file, const uint16_t dir_cluster, c
if (dir_cluster == 0)
{
addr = clu_addr(fat, dir_cluster) + num * 32; // root directory, max 512 entries.
} else
}
else
{
addr = clu_offs(fat, dir_cluster, num * 32); // cluster + N (wrapping to next cluster if needed)
}
@ -307,7 +310,7 @@ void open_file(const FAT16* fat, FAT16_FILE* file, const uint16_t dir_cluster, c
file->type = FT_FILE;
switch(file->name[0])
switch (file->name[0])
{
case 0x00:
file->type = FT_NONE;
@ -327,7 +330,8 @@ void open_file(const FAT16* fat, FAT16_FILE* file, const uint16_t dir_cluster, c
{
// ".." directory
file->type = FT_PARENT;
} else
}
else
{
// "." directory
file->type = FT_SELF;
@ -382,41 +386,43 @@ void fat16_init(const BLOCKDEV* dev, FAT16* fat)
*/
bool fat16_fseek(FAT16_FILE* file, uint32_t addr)
{
const FAT16* fat = file->fat;
// Store as rel
file->cur_rel = addr;
// Rewind and resolve abs, clu, ofs
file->cur_clu = file->clu_start;
while (addr >= file->fat->bs.bytes_per_cluster)
while (addr >= fat->bs.bytes_per_cluster)
{
uint32_t next;
// Go to next cluster, allocate if needed
do {
next = next_clu(file->fat, file->cur_clu);
do
{
next = next_clu(fat, file->cur_clu);
if (next == 0xFFFF)
{
// reached end of allocated space
// add one more cluster
if (!append_cluster(file->fat, file->cur_clu))
if (!append_cluster(fat, file->cur_clu))
{
return false;
}
printf("Allocating new cluster due to seek past EOF\n");
}
} while(next == 0xFFFF);
}
while (next == 0xFFFF);
file->cur_clu = next;
addr -= file->fat->bs.bytes_per_cluster;
addr -= fat->bs.bytes_per_cluster;
}
file->cur_abs = clu_addr(file->fat, file->cur_clu) + addr;
file->cur_abs = clu_addr(fat, file->cur_clu) + addr;
file->cur_ofs = addr;
// Physically seek to that location
file->fat->dev->seek(file->cur_abs);
fat->dev->seek(file->cur_abs);
return true;
}
@ -427,7 +433,8 @@ bool fat16_fseek(FAT16_FILE* file, uint32_t addr)
*/
bool fat16_is_file_valid(const FAT16_FILE* file)
{
switch (file->type) {
switch (file->type)
{
case FT_FILE:
case FT_SUBDIR:
case FT_SELF:
@ -444,18 +451,11 @@ bool fat16_is_file_valid(const FAT16_FILE* file)
bool fat16_fread(FAT16_FILE* file, void* target, uint32_t len)
{
if (file->cur_abs == 0xFFFF) {
printf("File at 0xFFFF\n");
if (file->cur_abs == 0xFFFF)
return false; // file at the end already
}
if (file->cur_rel + len > file->size)
{
// Attempt to read more than what is available
printf("Attempt to read more than what is available\n");
return false;
}
return false; // Attempt to read more than what is available
const FAT16* fat = file->fat;
const BLOCKDEV* dev = fat->dev;
@ -493,7 +493,7 @@ bool fat16_fread(FAT16_FILE* file, void* target, uint32_t len)
}
bool fat16_fwrite(FAT16_FILE* file, void* src, uint32_t len)
bool fat16_fwrite(FAT16_FILE* file, void* source, uint32_t len)
{
const FAT16* fat = file->fat;
const BLOCKDEV* dev = fat->dev;
@ -507,8 +507,10 @@ bool fat16_fwrite(FAT16_FILE* file, void* src, uint32_t len)
{
const uint32_t pos_start = file->cur_rel;
// Seek to the last position, using fseek to allocate clusters
if (!fat16_fseek(file, pos_start + len)) return false;
// Seek to the last position
// -> fseek will allocate clusters
if (!fat16_fseek(file, pos_start + len))
return false; // error in seek
// Write starts beyond EOF - creating a zero-filled "hole"
if (file->cur_rel > file->size)
@ -532,8 +534,6 @@ bool fat16_fwrite(FAT16_FILE* file, void* src, uint32_t len)
dev->write(0);
}
printf("Wrote %d filler zeros.\n", chunk);
// subtract from "needed" what was just placed
fill -= chunk;
@ -545,7 +545,7 @@ bool fat16_fwrite(FAT16_FILE* file, void* src, uint32_t len)
}
// Save new size
fat16_set_file_size(file, pos_start + len);
fat16_resize(file, pos_start + len);
// Seek back to where it was before
fat16_fseek(file, pos_start);
@ -560,25 +560,25 @@ bool fat16_fwrite(FAT16_FILE* file, void* src, uint32_t len)
// store the chunk
dev->seek(file->cur_abs);
dev->store(src, chunk);
dev->store(source, chunk);
// advance cursors
file->cur_abs += chunk;
file->cur_rel += chunk;
file->cur_ofs += chunk;
src += chunk; // advance the source pointer
// Pointer arith!
source += chunk; // advance the source pointer
// detect cluster overflow
if (file->cur_ofs >= fat->bs.bytes_per_cluster)
{
// advance to following cluster
file->cur_clu = next_clu(fat, file->cur_clu);
file->cur_abs = clu_addr(fat, file->cur_clu);
file->cur_ofs = 0;
}
printf("Stored %d bytes of data.\n", chunk);
// subtract written length
len -= chunk;
}
@ -597,20 +597,16 @@ bool fat16_next(FAT16_FILE* file)
if (file->clu == 0 && file->num >= fat->bs.root_entries)
return false; // attempt to read outside root directory.
uint32_t addr = clu_offs(fat, file->clu, (file->num + 1) * 32);
const uint32_t addr = clu_offs(fat, file->clu, (file->num + 1) * 32);
if (addr == 0xFFFF)
return false; // next file is out of the directory cluster
// read first byte of the file entry; if zero, can't read (file is NONE)
// FIXME this may be a problem when creating a new file...?
uint8_t x;
// read first byte of the file entry
dev->seek(addr);
x = dev->read();
if (x == 0)
return false;
if (dev->read() == 0)
return false; // can't read (file is NONE)
open_file(fat, file, file->clu, file->num+1);
open_file(fat, file, file->clu, file->num + 1);
return true;
}
@ -622,11 +618,7 @@ bool fat16_prev(FAT16_FILE* file)
if (file->num == 0)
return false; // first file already
open_file(file->fat, file, file->clu, file->num-1);
/* // Skip bad files
if (!fat16_is_file_valid(file))
fat16_prev(file);*/
open_file(file->fat, file, file->clu, file->num - 1);
return true;
}
@ -639,7 +631,7 @@ void fat16_first(FAT16_FILE* file)
}
/** Open a directory */
/** Open a directory denoted by the file. */
bool fat16_opendir(FAT16_FILE* file)
{
// Don't open non-dirs and "." directory.
@ -651,7 +643,7 @@ bool fat16_opendir(FAT16_FILE* file)
}
void fat16_open_root(const FAT16* fat, FAT16_FILE* file)
void fat16_root(const FAT16* fat, FAT16_FILE* file)
{
open_file(fat, file, 0, 0);
}
@ -662,104 +654,170 @@ void fat16_open_root(const FAT16* fat, FAT16_FILE* file)
* If file is found, "dir" will contain it's handle.
* Either way, "dir" gets modified and you may need to rewind it afterwards.
*/
bool fat16_find_file(FAT16_FILE* dir, const char* name)
bool fat16_find(FAT16_FILE* dir, const char* name)
{
char fname[11];
fat16_undisplay_name(name, fname);
fat16_rawname(name, fname);
return dir_contains_file_raw(dir, fname);
}
bool fat16_newfile(FAT16_FILE* dir, FAT16_FILE* file, const char* name)
/** Go through a directory, and open first NONE or DELETED file. */
bool find_empty_file_slot(FAT16_FILE* file)
{
// Convert filename to zero padded raw string
char fname[11];
fat16_undisplay_name(name, fname);
// Abort if file already exists
bool exists = dir_contains_file_raw(dir, fname);
fat16_first(dir); // rewind dir
if (exists) return false;
const uint16_t clu = file->clu;
const FAT16* fat = file->fat;
// Find free directory entry that can be used
uint16_t clu = dir->clu;
const FAT16* fat = dir->fat;
for (uint16_t num = 0; num < 0xFFFF; num++)
{
// root directory has fewer entries, error if trying
// to add one more.
if (dir->clu == 0 && num >= fat->bs.root_entries)
if (file->clu == 0 && num >= fat->bs.root_entries)
return false;
// Resolve addres of next file entry
uint32_t addr;
do {
addr = clu_offs(fat, dir->clu, num * 32);
do
{
addr = clu_offs(fat, file->clu, num * 32);
if (addr == 0xFFFF)
{
// end of chain of allocated clusters for the directory
// append new cluster, return false on failure
if (!append_cluster(fat, dir->clu)) return false;
if (!append_cluster(fat, file->clu)) return false;
}
// if new cluster was just added, repeat.
} while (addr == 0xFFFF);
}
while (addr == 0xFFFF);
// Open the file entry
open_file(fat, file, clu, num);
// Check if can be overwritten
if (file->type == FT_DELETED || file->type == FT_NONE)
{
const uint16_t newclu = alloc_cluster(fat);
const uint32_t entrystart = clu_offs(fat, clu, num * 32);
return true;
}
}
// store the file name
fat->dev->seek(entrystart);
return false; // not found.
}
// filename, without dor, zero-padded.
fat->dev->store(fname, 11);
fat->dev->write(0); // attributes
/** Write information into a file header (alloc first cluster). "file" is an open handle. */
void write_file_header(FAT16_FILE* file, const char* fname, const uint8_t attribs, const uint16_t newclu)
{
const FAT16* fat = file->fat;
const BLOCKDEV* dev = fat->dev;
// 10 reserved, 2+2 date & time
for (uint8_t i = 0; i < 14; i++)
{
fat->dev->write(0);
}
const uint32_t entrystart = clu_offs(fat, file->clu, file->num * 32);
fat->dev->write16(newclu); // starting cluster
// store the file name
dev->seek(entrystart);
dev->store(fname, 11);
// file size (uint32_t)
fat->dev->write16(0);
fat->dev->write16(0);
// attributes
dev->write(attribs);
// reopen file, load the information just written
open_file(fat, file, clu, num);
return true;
}
// 10 reserved, 2+2 date & time
// (could just skip, but better to fill with zeros)
for (uint8_t i = 0; i < 14; i++)
{
dev->write(0);
}
return false;
// addr of the first file cluster
dev->write16(newclu);
// file size (uint32_t)
dev->write16(0);
dev->write16(0);
// reopen file - load & parse the information just written
open_file(fat, file, file->clu, file->num);
}
char* fat16_volume_label(const FAT16* fat, char* str)
bool fat16_mkfile(FAT16_FILE* file, const char* name)
{
// Convert filename to zero padded raw string
char fname[11];
fat16_rawname(name, fname);
// Abort if file already exists
bool exists = dir_contains_file_raw(file, fname);
fat16_first(file); // rewind dir
if (exists)
return false; // file already exists in the dir.
if (!find_empty_file_slot(file))
return false; // error finding a slot
// Write into the new slot
const uint16_t newclu = alloc_cluster(file->fat);
write_file_header(file, fname, 0, newclu);
return true;
}
/**
* Create a sub-directory of given name.
* Directory is allocated and populated with entries "." and ".."
*/
bool fat16_mkdir(FAT16_FILE* file, const char* name)
{
// Convert filename to zero padded raw string
char fname[11];
fat16_rawname(name, fname);
// Abort if file already exists
bool exists = dir_contains_file_raw(file, fname);
fat16_first(file); // rewind dir
if (exists)
return false; // file already exusts in the dir.
if (!find_empty_file_slot(file))
return false; // error finding a slot
// Write into the new slot
const uint16_t newclu = alloc_cluster(file->fat);
write_file_header(file, fname, FA_DIR, newclu);
const uint32_t parent_clu = file->clu;
open_file(file->fat, file, file->clu_start, 0);
write_file_header(file, ". ", FA_DIR, newclu);
// Advance to next file slot
find_empty_file_slot(file);
write_file_header(file, ".. ", FA_DIR, parent_clu);
// rewind.
fat16_first(file);
return true;
}
char* fat16_disk_label(const FAT16* fat, char* label_out)
{
FAT16_FILE first;
fat16_open_root(fat, &first);
fat16_root(fat, &first);
if (first.type == FT_LABEL) {
return fat16_display_name(&first, str);
if (first.type == FT_LABEL)
{
return fat16_dispname(&first, label_out);
}
// find where spaces end
uint8_t j = 10;
int8_t j = 10;
for (; j >= 0; j--)
{
if (fat->bs.volume_label[j] != ' ') break;
@ -769,25 +827,25 @@ char* fat16_volume_label(const FAT16* fat, char* str)
uint8_t i;
for (i = 0; i <= j; i++)
{
str[i] = fat->bs.volume_label[i];
label_out[i] = fat->bs.volume_label[i];
}
str[i] = 0; // ender
label_out[i] = 0; // ender
return str;
return label_out;
}
char* fat16_display_name(const FAT16_FILE* file, char* str)
char* fat16_dispname(const FAT16_FILE* file, char* disp_out)
{
// Cannot get name for special files
if (file->type == FT_NONE || // not-yet-used directory location
file->type == FT_DELETED || // deleted file entry
file->attribs == 0x0F) // long name special entry (system, hidden)
file->type == FT_DELETED || // deleted file entry
file->attribs == 0x0F) // long name special entry (system, hidden)
return NULL;
// find first non-space
uint8_t j = 7;
int8_t j = 7;
for (; j >= 0; j--)
{
if (file->name[j] != ' ') break;
@ -798,37 +856,37 @@ char* fat16_display_name(const FAT16_FILE* file, char* str)
uint8_t i;
for (i = 0; i <= j; i++)
{
str[i] = file->name[i];
disp_out[i] = file->name[i];
}
// directory entry, no extension
if (file->type == FT_SUBDIR || file->type == FT_SELF || file->type == FT_PARENT)
{
str[i] = 0; // end of string
return str;
disp_out[i] = 0; // end of string
return disp_out;
}
// add a dot
if (file->type != FT_LABEL) // volume label has no dot!
str[i++] = '.';
disp_out[i++] = '.';
// Add extension chars
for (j = 8; j < 11; j++, i++)
{
const char c = file->name[j];
if (c == ' ') break;
str[i] = c;
disp_out[i] = c;
}
str[i] = 0; // end of string
disp_out[i] = 0; // end of string
return str;
return disp_out;
}
char* fat16_undisplay_name(const char* name, char* fixed)
char* fat16_rawname(const char* disp_in, char* raw_out)
{
uint8_t name_c = 0, wr_c = 0;
bool filling = false;
@ -836,9 +894,10 @@ char* fat16_undisplay_name(const char* name, char* fixed)
for (; wr_c < 11; wr_c++)
{
// start filling with spaces if end of filename reached
char c = name[name_c];
uint8_t c = disp_in[name_c];
// handle special rule for 0xE5
if (name_c == 0 && c == 0xE5) {
if (name_c == 0 && c == 0xE5)
{
c = 0x05;
}
@ -851,7 +910,7 @@ char* fat16_undisplay_name(const char* name, char* fixed)
if (c == '.')
{
name_c++; // skip the dot
c = name[name_c];
c = disp_in[name_c];
at_ext = true;
}
}
@ -863,13 +922,14 @@ char* fat16_undisplay_name(const char* name, char* fixed)
if (!at_ext)
{
// try to advance past dot (if any)
while(true)
while (true)
{
c = name[name_c++];
c = disp_in[name_c++];
if (c == 0) break;
if (c == '.') {
if (c == '.')
{
// read char PAST the dot
c = name[name_c];
c = disp_in[name_c];
at_ext = true;
break;
}
@ -887,21 +947,21 @@ char* fat16_undisplay_name(const char* name, char* fixed)
if (!filling)
{
// copy char of filename
fixed[wr_c] = name[name_c++];
raw_out[wr_c] = disp_in[name_c++];
}
else
{
// add a filler space
fixed[wr_c] = ' ';
raw_out[wr_c] = ' ';
}
}
return fixed;
return raw_out;
}
/** Write new file size (also to the disk). Does not allocate clusters. */
void fat16_set_file_size(FAT16_FILE* file, uint32_t size)
void fat16_resize(FAT16_FILE* file, uint32_t size)
{
const FAT16* fat = file->fat;
const BLOCKDEV* dev = file->fat->dev;
@ -919,8 +979,6 @@ void fat16_set_file_size(FAT16_FILE* file, uint32_t size)
const uint16_t next = next_clu(fat, file->cur_clu);
if (next != 0xFFFF)
{
printf("Trimming file clusters\n");
free_cluster_chain(fat, next);
// Mark that there's no further clusters
@ -929,7 +987,7 @@ void fat16_set_file_size(FAT16_FILE* file, uint32_t size)
}
void fat16_delete_file(FAT16_FILE* file)
void fat16_delete(FAT16_FILE* file)
{
const FAT16* fat = file->fat;

71
fat16.h
Unescape View File

@ -1,7 +1,8 @@
#pragma once
/** Abstract block device interface */
typedef struct {
typedef struct
{
// Sequential read
void (*load)(void* dest, const uint16_t len);
// Sequential write
@ -24,7 +25,8 @@ typedef struct {
// -------------------------------
/** file types (values don't matter) */
typedef enum {
typedef enum
{
FT_NONE = '-',
FT_DELETED = 'x',
FT_SUBDIR = 'D',
@ -46,7 +48,8 @@ typedef enum {
/** Boot Sector structure - INTERNAL! */
typedef struct __attribute__((packed)) {
typedef struct __attribute__((packed))
{
// Fields loaded directly from disk:
@ -66,11 +69,13 @@ typedef struct __attribute__((packed)) {
uint32_t bytes_per_cluster;
} Fat16BootSector;
}
Fat16BootSector;
/** FAT filesystem handle - private fields! */
typedef struct __attribute__((packed)) {
typedef struct __attribute__((packed))
{
// Backing block device
const BLOCKDEV* dev;
@ -85,12 +90,13 @@ typedef struct __attribute__((packed)) {
// Boot sector data struct
Fat16BootSector bs;
} FAT16;
}
FAT16;
/** File handle struct */
typedef struct __attribute__((packed)) {
typedef struct __attribute__((packed))
{
// Fields loaded directly from disk:
uint8_t name[11]; // Starting 0x05 converted to 0xE5, other "magic chars" left intact
@ -117,12 +123,14 @@ typedef struct __attribute__((packed)) {
// pointer to FAT
const FAT16* fat;
} FAT16_FILE;
}
FAT16_FILE;
/** Initialize a filesystem */
void fat16_init(const BLOCKDEV* dev, FAT16* fat);
/**
* Open the first file of the root directory.
* The file may be invalid (eg. a volume label, deleted etc),
@ -130,12 +138,13 @@ void fat16_init(const BLOCKDEV* dev, FAT16* fat);
*
* Either way, the prev and next functions will work as expected.
*/
void fat16_open_root(const FAT16* fat, FAT16_FILE* file);
void fat16_root(const FAT16* fat, FAT16_FILE* file);
/**
* Resolve volume label.
* Resolve the disk label.
*/
char* fat16_volume_label(const FAT16* fat, char* str);
char* fat16_disk_label(const FAT16* fat, char* label_out);
// ----------- FILE I/O -------------
@ -154,29 +163,39 @@ bool fat16_fseek(FAT16_FILE* file, uint32_t addr);
*/
bool fat16_fread(FAT16_FILE* file, void* target, uint32_t len);
/**
* Write into file at a "seek" position.
* "seek" cursor must be within (0..filesize)
*/
bool fat16_fwrite(FAT16_FILE* file, void* src, uint32_t len);
bool fat16_fwrite(FAT16_FILE* file, void* source, uint32_t len);
/**
* Create a new file in given folder
*
* directory ... parent folder's first entry
* file ... where to store info about newly opened file
* file ... open directory; new file is opened into this handle.
* name ... name of the new file, including extension
*/
bool fat16_newfile(FAT16_FILE* directory, FAT16_FILE* file, const char* name);
bool fat16_mkfile(FAT16_FILE* file, const char* name);
/**
* Create a sub-directory of given name.
* Directory is allocated and populated with entries "." and ".."
*/
bool fat16_mkdir(FAT16_FILE* file, const char* name);
/**
* Write new file size (also to the disk).
* Allocates / frees needed clusters, does not erase them.
*/
void fat16_set_file_size(FAT16_FILE* file, uint32_t size);
void fat16_resize(FAT16_FILE* file, uint32_t size);
/** Delete a file entry and free clusters. Does NOT descend into subdirectories. */
void fat16_delete_file(FAT16_FILE* file);
void fat16_delete(FAT16_FILE* file);
// --------- NAVIGATION ------------
@ -184,21 +203,28 @@ void fat16_delete_file(FAT16_FILE* file);
/** Go to previous file in the directory (false = no prev file) */
bool fat16_prev(FAT16_FILE* file);
/** Go to next file in directory (false = no next file) */
bool fat16_next(FAT16_FILE* file);
/** Open a directory (file is a directory entry) */
/**
* Open a subdirectory denoted by the file.
* Provided handle changes to first entry of the directory.
*/
bool fat16_opendir(FAT16_FILE* file);
/** Rewind to first file in directory */
void fat16_first(FAT16_FILE* file);
/**
* Find a file with given "display name" in this directory.
* If file is found, "dir" will contain it's handle.
* Either way, "dir" gets modified and you may need to rewind it afterwards.
*/
bool fat16_find_file(FAT16_FILE* dir, const char* name);
bool fat16_find(FAT16_FILE* dir, const char* name);
// -------- FILE INSPECTION -----------
@ -211,11 +237,12 @@ bool fat16_is_file_valid(const FAT16_FILE* file);
* Resolve a file name, trim spaces and add null terminator.
* Returns the passed char*, or NULL on error.
*/
char* fat16_display_name(const FAT16_FILE* file, char* str);
char* fat16_dispname(const FAT16_FILE* file, char* disp_out);
/**
* Convert filename to zero-padded fixed length one
* Returns the passed char*.
*/
char* fat16_undisplay_name(const char* name, char* fixed);
char* fat16_rawname(const char* disp_in, char* raw_out);

59
main.c
Unescape View File

@ -90,12 +90,8 @@ void test_close()
// --- testing ---
int main(int argc, char const *argv[])
int main()
{
uint32_t i32;
uint16_t i16;
uint8_t i8;
test_open();
// Initialize the FS
@ -103,22 +99,57 @@ int main(int argc, char const *argv[])
fat16_init(&test, &fat);
FAT16_FILE file;
fat16_open_root(&fat, &file);
fat16_root(&fat, &file);
char str[12];
printf("Disk label: %s\n", fat16_volume_label(&fat, str));
printf("Disk label: %s\n", fat16_disk_label(&fat, str));
do {
do
{
if (!fat16_is_file_valid(&file)) continue;
printf("File name: %s, %c, %d B, @ 0x%x\n",
fat16_display_name(&file, str),
file.type, file.size, file.clu_start);
} while (fat16_next(&file));
fat16_open_root(&fat, &file);
fat16_dispname(&file, str),
file.type, file.size, file.clu_start);
}
while (fat16_next(&file));
fat16_root(&fat, &file);
if (fat16_find(&file, "FOLDER"))
{
if (fat16_opendir(&file))
{
printf("Listing FOLDER:\n");
do
{
printf("File name: %s, %c, %d B, @ 0x%x\n",
fat16_dispname(&file, str),
file.type, file.size, file.clu_start);
}
while (fat16_next(&file));
if (fat16_find(&file, "banana.exe"))
{
char m[49];
fat16_fread(&file, m, 49);
printf("%.49s\n", m);
}
}
}
//fat16_mkfile(&file, "banana.exe");
//fat16_fwrite(&file, "THIS IS A STRING STORED IN A FILE CALLED BANANA!\n", 49);
// fat16_find(&file, "banana.exe");
// char m[49];
// fat16_fread(&file, m, 49);
// printf("%.49s\n", m);
//fat16_mkdir(&file, "FOLDER2");
// bool found = fat16_find_file(&file, "NEW_FILE.DAT");
//

BIN
test
View File

Binary file not shown.
Write Preview
Loading…
Cancel
Save