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

Refactoring + cleanup, support for creating new files, function to find a file in dir.

Browse Source
master
Ondřej Hruška 9 years ago
parent 0bdc15e1d4
commit 2781148a25
3 changed files with 512 additions and 186 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. 582
      fat16.c
  2. 53
      fat16.h
  3. 63
      main.c

582
fat16.c
Unescape View File

@ -6,122 +6,47 @@
#include "fat16.h"
char* fat16_volume_label(const FAT16* fat, char* str)
{
FAT16_FILE first;
fat16_open_root(fat, &first);
if (first.type == FT_LABEL) {
return fat16_display_name(&first, str);
}
// find where spaces end
uint8_t j = 10;
for (; j >= 0; j--)
{
if (fat->bs.volume_label[j] != ' ') break;
}
// copy all until spaces
uint8_t i;
for (i = 0; i <= j; i++)
{
str[i] = fat->bs.volume_label[i];
}
str[i] = 0; // ender
return str;
}
/**
* 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)
{
// 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)
return NULL;
// find first non-space
uint8_t j = 7;
for (; j >= 0; j--)
{
if (file->name[j] != ' ') break;
}
// j ... last no-space char
uint8_t i;
for (i = 0; i <= j; i++)
{
str[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;
}
// add a dot
if (file->type != FT_LABEL) // volume label has no dot!
str[i++] = '.';
// Add extension chars
for (j = 0; j < 3; j++, i++)
{
const char c = file->ext[j];
if (c == ' ') break;
str[i] = c;
}
str[i] = 0; // end of string
return str;
}
// ============== INTERNAL PROTOTYPES ==================
/** Read boot sector from given address */
void _fat16_read_bs(const BLOCKDEV* dev, Fat16BootSector* info, const uint32_t addr);
/**
* Find absolute address of first BootSector.
* Returns 0 on failure.
*/
uint32_t _fat16_find_bs(const BLOCKDEV* dev);
void read_bs(const BLOCKDEV* dev, Fat16BootSector* info, const uint32_t addr);
/** Find absolute address of first BootSector. Returns 0 on failure. */
uint32_t find_bs(const BLOCKDEV* dev);
/** Get cluster's starting address */
uint32_t _fat16_clu_start(const FAT16* fat, const uint16_t cluster);
uint32_t clu_start(const FAT16* fat, const uint16_t cluster);
/** Find following cluster using FAT for jumps */
uint16_t _fat16_next_clu(const FAT16* fat, uint16_t cluster);
uint16_t next_clu(const FAT16* fat, uint16_t cluster);
/** Find relative address in a file, using FAT for cluster lookup */
uint32_t _fat16_clu_add(const FAT16* fat, uint16_t cluster, uint32_t addr);
uint32_t clu_add(const FAT16* fat, uint16_t cluster, uint32_t addr);
/** Read a file entry from directory (dir starting cluster, entry number) */
void _fat16_fopen(const FAT16* fat, FAT16_FILE* file, const uint16_t dir_cluster, const uint16_t num);
void fat16_fopen(const FAT16* fat, FAT16_FILE* file, const uint16_t dir_cluster, const uint16_t num);
/** Allocate and chain new cluster to a chain starting at given cluster */
bool append_cluster(const FAT16* fat, const uint16_t clu);
/** Allocate a new cluster, clean it, and mark with 0xFFFF in FAT */
uint16_t alloc_cluster(const FAT16* fat);
/** Zero out entire cluster. */
void wipe_cluster(const FAT16* fat, const uint16_t clu);
/**
* Find absolute address of first boot sector.
* Returns 0 on failure.
* Check if there is already a file of given RAW name
* Raw name - name as found on disk, not "display name".
*/
uint32_t _fat16_find_bs(const BLOCKDEV* dev)
bool dir_contains_file_raw(FAT16_FILE* dir, char* fname);
// =========== INTERNAL FUNCTION IMPLEMENTATIONS =========
/** Find absolute address of first boot sector. Returns 0 on failure. */
uint32_t find_bs(const BLOCKDEV* dev)
{
// Reference structure:
//
@ -141,19 +66,21 @@ uint32_t _fat16_find_bs(const BLOCKDEV* dev)
for (uint8_t i = 0; i < 4; i++, addr += 16)
{
// Read partition type
dev->aread(&tmp, 1, addr);
dev->seek(addr);
tmp = dev->read();
// Check if type is valid
if (tmp == 4 || tmp == 6 || tmp == 14)
{
// read MBR address
dev->rseek(3);// skip 3 bytes
dev->read(&tmp, 4);
dev->load(&tmp, 4);
tmp = tmp << 9; // multiply address by 512 (sector size)
// Verify that the boot sector has a valid signature mark
dev->aread(&tmp2, 2, tmp + 510);
dev->seek(tmp + 510);
dev->load(&tmp2, 2);
if (tmp2 != 0xAA55) continue; // continue to next entry
// return absolute MBR address
@ -165,25 +92,26 @@ uint32_t _fat16_find_bs(const BLOCKDEV* dev)
}
void _fat16_read_bs(const BLOCKDEV* dev, Fat16BootSector* info, const uint32_t addr)
/** Read the boot sector */
void read_bs(const BLOCKDEV* dev, Fat16BootSector* info, const uint32_t addr)
{
dev->seek(addr + 13); // skip 13
dev->read(&(info->sectors_per_cluster), 6); // spc, rs, nf, re
dev->load(&(info->sectors_per_cluster), 6); // spc, rs, nf, re
info->total_sectors = 0;
dev->read(&(info->total_sectors), 2); // short sectors
dev->load(&(info->total_sectors), 2); // short sectors
dev->rseek(1); // md
dev->read(&(info->fat_size_sectors), 2);
dev->load(&(info->fat_size_sectors), 2);
dev->rseek(8); // spt, noh, hs
// read or skip long sectors field
if (info->total_sectors == 0)
{
dev->read(&(info->total_sectors), 4);
dev->load(&(info->total_sectors), 4);
} else
{
dev->rseek(4); // tsl
@ -191,50 +119,141 @@ void _fat16_read_bs(const BLOCKDEV* dev, Fat16BootSector* info, const uint32_t a
dev->rseek(7); // dn, ch, bs, vi
dev->read(&(info->volume_label), 11);
}
/** Initialize a FAT16 handle */
void fat16_init(const BLOCKDEV* dev, FAT16* fat)
{
const uint32_t bs_a = _fat16_find_bs(dev);
fat->dev = dev;
_fat16_read_bs(dev, &(fat->bs), bs_a);
fat->fat_addr = bs_a + (fat->bs.reserved_sectors * 512);
fat->rd_addr = bs_a + (fat->bs.reserved_sectors + fat->bs.fat_size_sectors * fat->bs.num_fats) * 512;
fat->data_addr = fat->rd_addr + (fat->bs.root_entries * 32); // entry is 32B long
fat->bs.bytes_per_cluster = (fat->bs.sectors_per_cluster * 512);
dev->load(&(info->volume_label), 11);
}
/** Get cluster starting address */
uint32_t _fat16_clu_start(const FAT16* fat, const uint16_t cluster)
uint32_t clu_start(const FAT16* fat, const uint16_t cluster)
{
if (cluster < 2) return fat->rd_addr;
return fat->data_addr + (cluster - 2) * fat->bs.bytes_per_cluster;
}
uint16_t _fat16_next_clu(const FAT16* fat, uint16_t cluster)
uint16_t next_clu(const FAT16* fat, uint16_t cluster)
{
fat->dev->aread(&cluster, 2, fat->fat_addr + (cluster * 2));
return cluster;
fat->dev->seek(fat->fat_addr + (cluster * 2));
return fat->dev->read16();
}
/** Find file-relative address in fat table */
uint32_t _fat16_clu_add(const FAT16* fat, uint16_t cluster, uint32_t addr)
uint32_t clu_add(const FAT16* fat, uint16_t cluster, uint32_t addr)
{
while (addr >= fat->bs.bytes_per_cluster)
{
cluster = _fat16_next_clu(fat, cluster);
cluster = next_clu(fat, cluster);
if (cluster == 0xFFFF) return 0xFFFF; // fail
addr -= fat->bs.bytes_per_cluster;
}
return _fat16_clu_start(fat, cluster) + addr;
return clu_start(fat, cluster) + addr;
}
/**
* Zero out entire cluster
* This is important only for directory clusters, so we can
* zero only every first byte of each file entry, to indicate
* that it is unused (FT_NONE).
*/
void wipe_cluster(const FAT16* fat, const uint16_t clu)
{
uint32_t addr = clu_start(fat, clu);
const BLOCKDEV* dev = fat->dev;
dev->seek(addr);
for (uint32_t b = 0; b < fat->bs.bytes_per_cluster; b += 32)
{
dev->write(0);
dev->rseek(32);
}
}
/** Allocate a new cluster, clean it, and mark with 0xFFFF in FAT */
uint16_t alloc_cluster(const FAT16* fat)
{
// find new unclaimed cluster that can be added to the chain.
uint16_t i, b;
for (i = 2; i < fat->bs.fat_size_sectors * 256; i++)
{
// read value from FAT
fat->dev->seek(fat->fat_addr + (i * 2));
b = fat->dev->read16();
if (b == 0)
{
// Write FFFF to "i", to mark end of file
b = 0xFFFF;
fat->dev->seek(fat->fat_addr + (i * 2));
fat->dev->write16(b);
// Wipe the cluster
wipe_cluster(fat, i);
return i;
}
}
return 0xFFFF;//error code
}
/** Allocate and chain new cluster to a chain starting at given cluster */
bool append_cluster(const FAT16* fat, const uint16_t clu)
{
uint16_t clu2 = alloc_cluster(fat);
if (clu2 == 0xFFFF) return false;
// Write "i" to "clu"
fat->dev->seek(fat->fat_addr + (clu * 2));
fat->dev->write16(clu2);
return true;
}
/**
* Check if there is already a file of given RAW name
* Raw name - name as found on disk, not "display name".
*/
bool dir_contains_file_raw(FAT16_FILE* dir, char* fname)
{
do {
bool diff = false;
for (uint8_t i = 0; i < 11; i++)
{
if (dir->name[i] != fname[i])
{
diff = true;
break;
}
}
if (!diff) return true;
} while (fat16_next(dir));
return false;
}
// =============== PUBLIC FUNCTION IMPLEMENTATIONS =================
/** Initialize a FAT16 handle */
void fat16_init(const BLOCKDEV* dev, FAT16* fat)
{
const uint32_t bs_a = find_bs(dev);
fat->dev = dev;
read_bs(dev, &(fat->bs), bs_a);
fat->fat_addr = bs_a + (fat->bs.reserved_sectors * 512);
fat->rd_addr = bs_a + (fat->bs.reserved_sectors + fat->bs.fat_size_sectors * fat->bs.num_fats) * 512;
fat->data_addr = fat->rd_addr + (fat->bs.root_entries * 32); // entry is 32B long
fat->bs.bytes_per_cluster = (fat->bs.sectors_per_cluster * 512);
}
@ -253,11 +272,11 @@ bool fat16_fseek(FAT16_FILE* file, uint32_t addr)
while (addr >= file->fat->bs.bytes_per_cluster)
{
file->cur_clu = _fat16_next_clu(file->fat, file->cur_clu);
file->cur_clu = next_clu(file->fat, file->cur_clu);
addr -= file->fat->bs.bytes_per_cluster;
}
file->cur_abs = _fat16_clu_start(file->fat, file->cur_clu) + addr;
file->cur_abs = clu_start(file->fat, file->cur_clu) + addr;
file->cur_ofs = addr;
return true;
@ -270,21 +289,22 @@ bool fat16_fseek(FAT16_FILE* file, uint32_t addr)
* dir_cluster ... directory start cluster
* num ... entry number in the directory
*/
void _fat16_fopen(const FAT16* fat, FAT16_FILE* file, const uint16_t dir_cluster, const uint16_t num)
void fat16_fopen(const FAT16* fat, FAT16_FILE* file, const uint16_t dir_cluster, const uint16_t num)
{
// Resolve starting address
uint32_t addr;
if (dir_cluster == 0)
{
addr = _fat16_clu_start(fat, dir_cluster) + num * 32; // root directory, max 512 entries.
addr = clu_start(fat, dir_cluster) + num * 32; // root directory, max 512 entries.
} else
{
addr = _fat16_clu_add(fat, dir_cluster, num * 32); // cluster + N (wrapping to next cluster if needed)
addr = clu_add(fat, dir_cluster, num * 32); // cluster + N (wrapping to next cluster if needed)
}
fat->dev->aread(file, 12, addr);
fat->dev->seek(addr);
fat->dev->load(file, 12); // name, ext, attribs
fat->dev->rseek(14); // skip 14 bytes
fat->dev->read(((void*)file) + 12, 6); // read remaining bytes
fat->dev->load(((void*)file) + 12, 6); // read remaining bytes
file->clu = dir_cluster;
file->num = num;
@ -364,7 +384,6 @@ bool fat16_is_file_valid(const FAT16_FILE* file)
}
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
bool fat16_fread(FAT16_FILE* file, void* target, uint32_t len)
@ -375,11 +394,15 @@ bool fat16_fread(FAT16_FILE* file, void* target, uint32_t len)
if (file->cur_rel + len > file->size)
return false; // attempt to read outside file size
const FAT16* fat = file->fat;
const BLOCKDEV* dev = fat->dev;
while (len > 0 && file->cur_rel < file->size)
{
uint16_t chunk = MIN(file->size - file->cur_rel, MIN(file->fat->bs.bytes_per_cluster - file->cur_ofs, len));
uint16_t chunk = MIN(file->size - file->cur_rel, MIN(fat->bs.bytes_per_cluster - file->cur_ofs, len));
file->fat->dev->aread(target, chunk, file->cur_abs);
dev->seek(file->cur_abs);
dev->load(target, chunk);
file->cur_abs += chunk;
file->cur_rel += chunk;
@ -387,10 +410,10 @@ bool fat16_fread(FAT16_FILE* file, void* target, uint32_t len)
target += chunk;
if (file->cur_ofs >= file->fat->bs.bytes_per_cluster)
if (file->cur_ofs >= fat->bs.bytes_per_cluster)
{
file->cur_clu = _fat16_next_clu(file->fat, file->cur_clu);
file->cur_abs = _fat16_clu_start(file->fat, file->cur_clu);
file->cur_clu = next_clu(fat, file->cur_clu);
file->cur_abs = clu_start(fat, file->cur_clu);
file->cur_ofs = 0;
}
@ -404,25 +427,26 @@ bool fat16_fread(FAT16_FILE* file, void* target, uint32_t len)
/** Open next file in the directory */
bool fat16_next(FAT16_FILE* file)
{
if (file->clu == 0 && file->num >= file->fat->bs.root_entries)
const FAT16* fat = file->fat;
const BLOCKDEV* dev = fat->dev;
if (file->clu == 0 && file->num >= fat->bs.root_entries)
return false; // attempt to read outside root directory.
uint32_t addr = _fat16_clu_add(file->fat, file->clu, (file->num + 1) * 32);
uint32_t addr = clu_add(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...
// FIXME this may be a problem when creating a new file...?
uint8_t x;
file->fat->dev->aread(&x, 1, addr);
dev->seek(addr);
x = dev->read();
if (x == 0)
return false;
_fat16_fopen(file->fat, file, file->clu, file->num+1);
/* // Skip bad files
if (!fat16_is_file_valid(file))
fat16_next(file);*/
fat16_fopen(fat, file, file->clu, file->num+1);
return true;
}
@ -434,7 +458,7 @@ bool fat16_prev(FAT16_FILE* file)
if (file->num == 0)
return false; // first file already
_fat16_fopen(file->fat, file, file->clu, file->num-1);
fat16_fopen(file->fat, file, file->clu, file->num-1);
/* // Skip bad files
if (!fat16_is_file_valid(file))
@ -444,6 +468,13 @@ bool fat16_prev(FAT16_FILE* file)
}
/** Rewind to first file in directory */
void fat16_first(FAT16_FILE* file)
{
fat16_fopen(file->fat, file, file->clu, 0);
}
/** Open a directory */
bool fat16_opendir(FAT16_FILE* file)
{
@ -451,12 +482,257 @@ bool fat16_opendir(FAT16_FILE* file)
if (!(file->attribs & FA_DIR) || file->type == FT_SELF)
return false;
_fat16_fopen(file->fat, file, file->clu_start, 0);
fat16_fopen(file->fat, file, file->clu_start, 0);
return true;
}
void fat16_open_root(const FAT16* fat, FAT16_FILE* file)
{
_fat16_fopen(fat, file, 0, 0);
fat16_fopen(fat, file, 0, 0);
}
/**
* 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)
{
char fname[11];
fat16_undisplay_name(name, fname);
return dir_contains_file_raw(dir, fname);
}
bool fat16_newfile(FAT16_FILE* dir, FAT16_FILE* file, const char* name)
{
// 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;
// Find free directory entry that can be used
uint16_t clu = dir->clu;
const FAT16* fat = dir->fat;
uint16_t num = 0;
for (; num < 0xFFFF; num++)
{
// root directory has fewer entries, error if trying
// to add one more.
if (dir->clu == 0 && num >= fat->bs.root_entries)
return false;
// Resolve addres of next file entry
uint32_t addr;
do {
addr = clu_add(fat, dir->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 new cluster was just added, repeat.
} while (addr == 0xFFFF);
// Open the file entry
fat16_fopen(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_add(fat, clu, num * 32);
// store the file name
fat->dev->seek(entrystart);
// filename, without dor, zero-padded.
fat->dev->store(fname, 11);
fat->dev->write(0); // attributes
fat->dev->rseek(14);
fat->dev->write16(newclu); // starting cluster
// file size (uint32_t)
fat->dev->write16(0);
fat->dev->write16(0);
// reopen file, load the information just written
fat16_fopen(fat, file, clu, num);
return true;
}
}
return false;
}
char* fat16_volume_label(const FAT16* fat, char* str)
{
FAT16_FILE first;
fat16_open_root(fat, &first);
if (first.type == FT_LABEL) {
return fat16_display_name(&first, str);
}
// find where spaces end
uint8_t j = 10;
for (; j >= 0; j--)
{
if (fat->bs.volume_label[j] != ' ') break;
}
// copy all until spaces
uint8_t i;
for (i = 0; i <= j; i++)
{
str[i] = fat->bs.volume_label[i];
}
str[i] = 0; // ender
return str;
}
char* fat16_display_name(const FAT16_FILE* file, char* str)
{
// 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)
return NULL;
// find first non-space
uint8_t j = 7;
for (; j >= 0; j--)
{
if (file->name[j] != ' ') break;
}
// j ... last no-space char
uint8_t i;
for (i = 0; i <= j; i++)
{
str[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;
}
// add a dot
if (file->type != FT_LABEL) // volume label has no dot!
str[i++] = '.';
// Add extension chars
for (j = 8; j < 11; j++, i++)
{
const char c = file->name[j];
if (c == ' ') break;
str[i] = c;
}
str[i] = 0; // end of string
return str;
}
char* fat16_undisplay_name(const char* name, char* fixed)
{
uint8_t name_c = 0, wr_c = 0;
bool filling = false;
bool at_ext = false;
for (; wr_c < 11; wr_c++)
{
// start filling with spaces if end of filename reached
char c = name[name_c];
// handle special rule for 0xE5
if (name_c == 0 && c == 0xE5) {
c = 0x05;
}
if (c == '.' || c == 0)
{
if (!filling)
{
filling = true;
if (c == '.')
{
name_c++; // skip the dot
c = name[name_c];
at_ext = true;
}
}
}
// if at the start of ext
if (wr_c == 8)
{
if (!at_ext)
{
// try to advance past dot (if any)
while(true)
{
c = name[name_c++];
if (c == 0) break;
if (c == '.') {
// read char PAST the dot
c = name[name_c];
at_ext = true;
break;
}
}
}
// if c has valid char for extension
if (c != 0 && c != '.')
{
// start copying again.
filling = false;
}
}
if (!filling)
{
// copy char of filename
fixed[wr_c] = name[name_c++];
}
else
{
// add a filler space
fixed[wr_c] = ' ';
}
}
return fixed;
}

53
fat16.h
Unescape View File

@ -3,13 +3,17 @@
/** Abstract block device interface */
typedef struct {
// Sequential read
void (*read)(void* dest, const uint16_t len);
// Read at address
void (*aread)(void* dest, const uint16_t len, const uint32_t addr);
void (*load)(void* dest, const uint16_t len);
// Sequential write
void (*write)(const void* src, const uint16_t len);
// Write at address
void (*awrite)(const void* src, const uint16_t len, const uint32_t addr);
void (*store)(const void* src, const uint16_t len);
// Sequential byte write
void (*write)(const uint8_t b);
// Sequential 2-byte write
void (*write16)(const uint16_t b);
// Sequential byte read
uint8_t (*read)(void);
// Sequential 2-byte read
uint16_t (*read16)(void);
// Absolute seek
void (*seek)(const uint32_t);
// Relative seek
@ -89,10 +93,9 @@ typedef struct __attribute__((packed)) {
// Fields loaded directly from disk:
uint8_t name[8]; // Starting 0x05 converted to 0xE5, other "magic chars" left intact
uint8_t ext[3];
uint8_t name[11]; // Starting 0x05 converted to 0xE5, other "magic chars" left intact
uint8_t attribs; // composed of FA_* constants
// 12 bytes skipped
// 14 bytes skipped
uint16_t clu_start;
uint32_t size;
@ -152,6 +155,16 @@ bool fat16_fseek(FAT16_FILE* file, uint32_t addr);
bool fat16_fread(FAT16_FILE* file, void* target, 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
* name ... name of the new file, including extension
*/
bool fat16_newfile(FAT16_FILE* directory, FAT16_FILE* file, const char* name);
// --------- NAVIGATION ------------
@ -159,14 +172,21 @@ bool fat16_fread(FAT16_FILE* file, void* target, uint32_t len);
/** 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) */
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);
// -------- FILE INSPECTION -----------
@ -175,12 +195,15 @@ bool fat16_opendir(FAT16_FILE* file);
bool fat16_is_file_valid(const FAT16_FILE* file);
/** Get opened file's type */
FAT16_FT fat16_get_type(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);
/**
* Convert filename to zero-padded fixed length one
* Returns the passed char*.
*/
char* fat16_undisplay_name(const char* name, char* fixed);

63
main.c
Unescape View File

@ -7,7 +7,7 @@
// ------------- test bed ----------------
// ------------- test ----------------
BLOCKDEV test;
FILE* testf;
@ -22,42 +22,62 @@ void test_rseek(const uint16_t pos)
fseek(testf, pos, SEEK_CUR);
}
void test_read(void* dest, const uint16_t len)
void test_load(void* dest, const uint16_t len)
{
for (int a = 0; a < len; a++) {
fread(dest+a, 1, 1, testf);
}
fread(dest, len, 1, testf);
// for (int a = 0; a < len; a++) {
// fread(dest+a, 1, 1, testf);
// }
}
void test_aread(void* dest, const uint16_t len, const uint32_t addr)
void test_store(const void* source, const uint16_t len)
{
test_seek(addr);
test_read(dest, len);
fwrite(source, len, 1, testf);
// for (int a = 0; a < len; a++) {
// fwrite(source+a, 1, 1, testf);
// }
}
void test_write(const uint8_t b)
{
fwrite(&b, 1, 1, testf);
}
void test_write16(const uint16_t b)
{
fwrite(&b, 2, 1, testf);
}
void test_write(const void* source, const uint16_t len)
uint8_t test_read()
{
for (int a = 0; a < len; a++) {
fwrite(source+a, 1, 1, testf);
}
uint8_t a;
fread(&a, 1, 1, testf);
return a;
}
void test_awrite(const void* source, const uint16_t len, const uint32_t addr)
uint16_t test_read16()
{
test_seek(addr);
test_write(source, len);
uint16_t a;
fread(&a, 2, 1, testf);
return a;
}
void test_open()
{
test.read = &test_read;
test.aread = &test_aread;
test.write = &test_write;
test.awrite = &test_awrite;
test.read16 = &test_read16;
test.write16 = &test_write16;
test.load = &test_load;
test.store = &test_store;
test.seek = &test_seek;
test.rseek = &test_rseek;
testf = fopen("imgs/dump_sd.img", "rb+");
testf = fopen("imgs/hamlet.img", "rb+");
}
void test_close()
@ -97,6 +117,13 @@ int main(int argc, char const *argv[])
} while (fat16_next(&file));
//FAT16_FILE file2;
fat16_open_root(&fat, &file);
//fat16_newfile(&file, &file2, "nuclear.war");
printf("Exists? %d\n", fat16_find_file(&file, "HAMLET.TXT"));
printf("Size: %d\n", file.size);
test_close();
return 0;

Write Preview
Loading…
Cancel
Save