mirror of
https://github.com/wiiu-env/libfat.git
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Added unicode support
This commit is contained in:
Michael Chisholm
parent
ccb080a071
commit
9deb154adb
@ -49,10 +49,16 @@
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2007-09-01 - Chishm
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* Use CLUSTER_ERROR when an error occurs with the FAT, not CLUSTER_FREE
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2007-11-01 - Chishm
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* Added unicode support
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*/
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#include <string.h>
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#include <ctype.h>
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#include <wchar.h>
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#include <wctype.h>
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#include <stdlib.h>
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#include "directory.h"
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#include "common.h"
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@ -66,8 +72,9 @@
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#define DIR_ENTRY_FREE 0xE5
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#define LAST_LFN_POS (19*13)
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#define LAST_LFN_POS_CORRECTION (MAX_FILENAME_LENGTH-15)
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#define LAST_LFN_POS_CORRECTION (MAX_LFN_LENGTH-15)
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typedef unsigned short ucs2_t;
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// Long file name directory entry
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enum LFN_offset {
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@ -98,75 +105,130 @@ const int LFN_offset_table[13]={0x01,0x03,0x05,0x07,0x09,0x0E,0x10,0x12,0x14,0x1
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const char ILLEGAL_ALIAS_CHARACTERS[] = "\\/:;*?\"<>|&+,=[] ";
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const char ILLEGAL_LFN_CHARACTERS[] = "\\/:*?\"<>|";
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bool _FAT_directory_isValidLfn (const char* name) {
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/*
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Returns number of UCS-2 characters needed to encode an LFN
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Returns -1 if it is an invalid LFN
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*/
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#define ABOVE_UCS_RANGE 0xF0
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static int _FAT_directory_lfnLength (const char* name) {
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u32 i;
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u32 nameLength;
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int ucsLength;
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const char* tempName = name;
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nameLength = strnlen(name, MAX_FILENAME_LENGTH);
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// Make sure the name is short enough to be valid
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if ( strnlen(name, MAX_FILENAME_LENGTH) >= MAX_FILENAME_LENGTH) {
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return false;
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if ( nameLength >= MAX_FILENAME_LENGTH) {
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return -1;
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}
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// Make sure it doesn't contain any invalid characters
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if (strpbrk (name, ILLEGAL_LFN_CHARACTERS) != NULL) {
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return false;
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return -1;
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}
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nameLength = strnlen(name, MAX_FILENAME_LENGTH);
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// Make sure the name doesn't contain any control codes
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// Make sure the name doesn't contain any control codes or codes not representable in UCS-2
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for (i = 0; i < nameLength; i++) {
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if (name[i] < 0x20) {
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return false;
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if (name[i] < 0x20 || name[i] >= ABOVE_UCS_RANGE) {
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return -1;
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}
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}
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// Convert to UCS-2 and get the resulting length
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ucsLength = mbsrtowcs(NULL, &tempName, MAX_LFN_LENGTH, NULL);
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if (ucsLength < 0 || ucsLength >= MAX_LFN_LENGTH) {
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return -1;
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}
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// Otherwise it is valid
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return true;
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return ucsLength;
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}
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bool _FAT_directory_isValidAlias (const char* name) {
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u32 i;
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u32 nameLength;
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const char* dot;
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/*
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Convert a multibyte encoded string into a NUL-terminated UCS-2 string, storing at most len characters
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return number of characters stored
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*/
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static size_t _FAT_directory_mbstoucs2 (ucs2_t* dst, const char* src, size_t len) {
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mbstate_t ps = {0};
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wchar_t tempChar;
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int bytes;
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size_t count = 0;
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// Make sure the name is short enough to be valid
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if ( strnlen(name, MAX_ALIAS_LENGTH) >= MAX_ALIAS_LENGTH) {
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return false;
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}
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// Make sure it doesn't contain any invalid characters
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if (strpbrk (name, ILLEGAL_ALIAS_CHARACTERS) != NULL) {
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return false;
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}
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nameLength = strnlen(name, MAX_ALIAS_LENGTH);
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// Make sure the name doesn't contain any control codes
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for (i = 0; i < nameLength; i++) {
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if (name[i] < 0x20) {
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return false;
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while (count < len-1 && src != '\0') {
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bytes = mbrtowc (&tempChar, src, MB_CUR_MAX, &ps);
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if (bytes > 0) {
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*dst = (ucs2_t)tempChar;
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src += bytes;
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dst++;
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count++;
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} else if (bytes == 0) {
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break;
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} else {
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return -1;
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}
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}
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*dst = '\0';
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dot = strchr ( name, '.');
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// Make sure there is only one '.'
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if ((dot != NULL) && (strrchr ( name, '.') != dot)) {
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return false;
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}
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// If there is a '.':
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if (dot != NULL) {
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// Make sure the filename portion is 1-8 characters long
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if (((dot - 1 - name) > 8) || ((dot - 1 - name) < 1)) {
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return false;
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}
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// Make sure the extension is 1-3 characters long, if it exists
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if ((strnlen(dot + 1, MAX_ALIAS_LENGTH) > 3) || (strnlen(dot + 1, MAX_ALIAS_LENGTH) < 1)) {
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return false;
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}
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} else {
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// Make sure the entire file name is 1-8 characters long
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if ((nameLength > 8) || (nameLength < 1)) {
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return false;
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}
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}
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// Since we made it through all those tests, it must be valid
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return true;
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return count;
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}
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/*
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Convert a UCS-2 string into a NUL-terminated multibyte string, storing at most len chars
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return number of chars stored
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*/
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static size_t _FAT_directory_ucs2tombs (char* dst, const ucs2_t* src, size_t len) {
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mbstate_t ps = {0};
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size_t count = 0;
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int bytes;
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char buff[MB_CUR_MAX];
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int i;
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while (count < len - 1 && src != '\0') {
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bytes = wcrtomb (buff, *src, &ps);
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if (bytes < 0) {
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return -1;
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}
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if (count + bytes < len && bytes > 0) {
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for (i = 0; i < bytes; i++) {
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*dst++ = buff[i];
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}
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src++;
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count += bytes;
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} else {
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break;
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}
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}
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*dst = L'\0';
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return count;
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}
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/*
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Case-independent comparison of two multibyte encoded strings
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*/
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static int _FAT_directory_mbsncasecmp (const char* s1, const char* s2, size_t len1) {
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wchar_t wc1, wc2;
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mbstate_t ps1 = {0};
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mbstate_t ps2 = {0};
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size_t b1 = 0;
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size_t b2 = 0;
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if (len1 == 0) {
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return 0;
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}
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do {
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s1 += b1;
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s2 += b2;
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b1 = mbrtowc(&wc1, s1, MB_CUR_MAX, &ps1);
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b2 = mbrtowc(&wc2, s2, MB_CUR_MAX, &ps2);
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if (b1 < 0 || b2 < 0) {
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break;
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}
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len1 -= b1;
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} while (len1 > 0 && towlower(wc1) == towlower(wc2) && wc1 != 0);
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return towlower(wc1) - towlower(wc2);
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}
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static bool _FAT_directory_entryGetAlias (const u8* entryData, char* destName) {
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int i=0;
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int j=0;
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@ -244,12 +306,13 @@ bool _FAT_directory_getNextEntry (PARTITION* partition, DIR_ENTRY* entry) {
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DIR_ENTRY_POSITION entryEnd;
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u8 entryData[0x20];
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ucs2_t lfn[MAX_LFN_LENGTH];
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bool notFound, found;
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u32 maxSectors;
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int lfnPos;
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u8 lfnChkSum, chkSum;
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char* filename;
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bool lfnExists;
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int i;
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@ -264,7 +327,6 @@ bool _FAT_directory_getNextEntry (PARTITION* partition, DIR_ENTRY* entry) {
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}
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entryEnd = entryStart;
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filename = entry->filename;
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// Can only be FAT16_ROOT_DIR_CLUSTER if it is the root directory on a FAT12 or FAT16 partition
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if (entryStart.cluster == FAT16_ROOT_DIR_CLUSTER) {
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@ -294,10 +356,10 @@ bool _FAT_directory_getNextEntry (PARTITION* partition, DIR_ENTRY* entry) {
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entryStart = entryEnd; // This is the start of a directory entry
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lfnExists = true;
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lfnPos = (entryData[LFN_offset_ordinal] & ~LFN_END) * 13;
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if (lfnPos > MAX_FILENAME_LENGTH - 1) {
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lfnPos = MAX_FILENAME_LENGTH - 1;
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if (lfnPos > MAX_LFN_LENGTH - 1) {
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lfnPos = MAX_LFN_LENGTH - 1;
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}
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filename[lfnPos] = '\0'; // Set end of lfn to null character
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lfn[lfnPos] = '\0'; // Set end of lfn to null character
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lfnChkSum = entryData[LFN_offset_checkSum];
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} if (lfnChkSum != entryData[LFN_offset_checkSum]) {
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lfnExists = false;
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@ -309,7 +371,7 @@ bool _FAT_directory_getNextEntry (PARTITION* partition, DIR_ENTRY* entry) {
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lfnPos = LAST_LFN_POS;
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}
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for (i = 0; i < 13; i++) {
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filename[lfnPos + i] = entryData[LFN_offset_table[i]]; // modify this for unicode support;
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lfn[lfnPos + i] = entryData[LFN_offset_table[i]] | (entryData[LFN_offset_table[i]+1] << 8);
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}
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}
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} else if (entryData[DIR_ENTRY_attributes] & ATTRIB_VOL) {
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@ -326,12 +388,18 @@ bool _FAT_directory_getNextEntry (PARTITION* partition, DIR_ENTRY* entry) {
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}
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if (chkSum != lfnChkSum) {
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lfnExists = false;
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filename[0] = '\0';
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entry->filename[0] = '\0';
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}
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}
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if (!lfnExists) {
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if (lfnExists) {
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if (_FAT_directory_ucs2tombs (entry->filename, lfn, MAX_FILENAME_LENGTH) < 0) {
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// Failed to convert the file name to UTF-8. Maybe the wrong locale is set?
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return false;
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}
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} else {
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entryStart = entryEnd;
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_FAT_directory_entryGetAlias (entryData, filename);
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_FAT_directory_entryGetAlias (entryData, entry->filename);
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}
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found = true;
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}
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@ -389,6 +457,8 @@ bool _FAT_directory_entryFromPosition (PARTITION* partition, DIR_ENTRY* entry) {
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bool entryStillValid;
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bool finished;
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ucs2_t lfn[MAX_LFN_LENGTH];
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int i;
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int lfnPos;
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@ -418,7 +488,7 @@ bool _FAT_directory_entryFromPosition (PARTITION* partition, DIR_ENTRY* entry) {
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lfnPos = LAST_LFN_POS_CORRECTION;
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}
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for (i = 0; i < 13; i++) {
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entry->filename[lfnPos + i] = entryData[LFN_offset_table[i]]; // modify this for unicode support;
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lfn[lfnPos + i] = entryData[LFN_offset_table[i]] | (entryData[LFN_offset_table[i]+1] << 8);
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}
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}
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}
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@ -434,8 +504,13 @@ bool _FAT_directory_entryFromPosition (PARTITION* partition, DIR_ENTRY* entry) {
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if (!_FAT_directory_entryGetAlias (entry->entryData, entry->filename)) {
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return false;
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}
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} else {
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// Encode the long file name into a multibyte string
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if (_FAT_directory_ucs2tombs (entry->filename, lfn, MAX_FILENAME_LENGTH) < 0) {
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return false;
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}
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}
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return true;
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}
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@ -481,7 +556,7 @@ bool _FAT_directory_entryFromPath (PARTITION* partition, DIR_ENTRY* entry, const
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// If the path is only specifying a directory in the form "."
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// and this is the root directory, return it
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if ((dirCluster == partition->rootDirCluster) && (strncasecmp(".", pathPosition, 2) == 0)) {
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if ((dirCluster == partition->rootDirCluster) && (strcmp(".", pathPosition) == 0)) {
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_FAT_directory_getRootEntry (partition, entry);
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found = true;
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}
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@ -506,14 +581,14 @@ bool _FAT_directory_entryFromPath (PARTITION* partition, DIR_ENTRY* entry, const
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while (foundFile && !found && !notFound) { // It hasn't already found the file
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// Check if the filename matches
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if ((dirnameLength == strnlen(entry->filename, MAX_FILENAME_LENGTH))
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&& (strncasecmp(entry->filename, pathPosition, dirnameLength) == 0)) {
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&& (_FAT_directory_mbsncasecmp(pathPosition, entry->filename, dirnameLength) == 0)) {
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found = true;
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}
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// Check if the alias matches
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_FAT_directory_entryGetAlias (entry->entryData, alias);
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if ((dirnameLength == strnlen(alias, MAX_ALIAS_LENGTH))
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&& (strncasecmp(alias, pathPosition, dirnameLength) == 0)) {
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&& (_FAT_directory_mbsncasecmp(pathPosition, alias, dirnameLength) == 0)) {
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found = true;
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}
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@ -680,14 +755,14 @@ static bool _FAT_directory_entryExists (PARTITION* partition, const char* name,
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while (foundFile) { // It hasn't already found the file
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// Check if the filename matches
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if ((dirnameLength == strnlen(tempEntry.filename, MAX_FILENAME_LENGTH))
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&& (strcasecmp(tempEntry.filename, name) == 0)) {
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&& (_FAT_directory_mbsncasecmp(name, tempEntry.filename, dirnameLength) == 0)) {
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return true;
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}
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// Check if the alias matches
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_FAT_directory_entryGetAlias (tempEntry.entryData, alias);
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if ((dirnameLength == strnlen(alias, MAX_ALIAS_LENGTH))
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&& (strcasecmp(alias, name) == 0)) {
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&& (_FAT_directory_mbsncasecmp(name, alias, dirnameLength) == 0)) {
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return true;
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}
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foundFile = _FAT_directory_getNextEntry (partition, &tempEntry);
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@ -695,7 +770,113 @@ static bool _FAT_directory_entryExists (PARTITION* partition, const char* name,
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return false;
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}
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/*
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Creates an alias for a long file name. If the alias is not an exact match for the
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filename, it returns the number of characters in the alias. If the two names match,
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it returns 0. If there was an error, it returns -1.
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*/
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static int _FAT_directory_createAlias (char* alias, const char* lfn) {
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bool lossyConversion = false; // Set when the alias had to be modified to be valid
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int lfnPos = 0;
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int aliasPos = 0;
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wchar_t lfnChar;
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int oemChar;
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mbstate_t ps = {0};
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int bytesUsed = 0;
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const char* lfnExt;
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int aliasExtLen;
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// Strip leading periods
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while (lfn[lfnPos] == '.') {
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lfnPos ++;
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lossyConversion = true;
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}
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// Primary portion of alias
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while (aliasPos < 8 && lfn[lfnPos] != '.' && lfn[lfnPos] != '\0') {
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bytesUsed = mbrtowc(&lfnChar, lfn + lfnPos, MAX_FILENAME_LENGTH - lfnPos, &ps);
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if (bytesUsed < 0) {
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return -1;
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}
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oemChar = wctob(towupper((wint_t)lfnChar));
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if (wctob((wint_t)lfnChar) != oemChar) {
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// Case of letter was changed
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lossyConversion = true;
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}
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if (oemChar == ' ') {
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// Skip spaces in filename
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lossyConversion = true;
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lfnPos += bytesUsed;
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continue;
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}
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if (oemChar == WEOF) {
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oemChar = '_'; // Replace unconvertable characters with underscores
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lossyConversion = true;
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}
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if (strchr (ILLEGAL_ALIAS_CHARACTERS, oemChar) != NULL) {
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// Invalid Alias character
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oemChar = '_'; // Replace illegal characters with underscores
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lossyConversion = true;
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}
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alias[aliasPos] = (char)oemChar;
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aliasPos++;
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lfnPos += bytesUsed;
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}
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// Alias extension
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lfnExt = strrchr (lfn, '.');
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if (lfnExt != NULL && lfnExt != strchr (lfn, '.')) {
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// More than one period in name
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lossyConversion = true;
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}
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if (lfnExt != NULL && lfnExt[1] != '\0') {
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alias[aliasPos] = '.';
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aliasPos++;
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memset (&ps, 0, sizeof(ps));
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for (aliasExtLen = 0; aliasExtLen < MAX_ALIAS_EXT_LENGTH && *lfnExt != '\0'; aliasExtLen++) {
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bytesUsed = mbrtowc(&lfnChar, lfnExt, MAX_FILENAME_LENGTH - lfnPos, &ps);
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if (bytesUsed < 0) {
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return -1;
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}
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oemChar = wctob(towupper((wint_t)lfnChar));
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if (wctob((wint_t)lfnChar) != oemChar) {
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// Case of letter was changed
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lossyConversion = true;
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}
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if (oemChar == ' ') {
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// Skip spaces in alias
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lossyConversion = true;
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lfnExt += bytesUsed;
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continue;
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}
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if (oemChar == WEOF) {
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oemChar = '_'; // Replace unconvertable characters with underscores
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lossyConversion = true;
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}
|
||||
if (strchr (ILLEGAL_ALIAS_CHARACTERS, oemChar) != NULL) {
|
||||
// Invalid Alias character
|
||||
oemChar = '_'; // Replace illegal characters with underscores
|
||||
lossyConversion = true;
|
||||
}
|
||||
|
||||
alias[aliasPos] = (char)oemChar;
|
||||
aliasPos++;
|
||||
lfnExt += bytesUsed;
|
||||
}
|
||||
if (*lfnExt != '\0') {
|
||||
// Extension was more than 3 characters long
|
||||
lossyConversion = true;
|
||||
}
|
||||
}
|
||||
|
||||
alias[aliasPos] = '\0';
|
||||
if (lossyConversion) {
|
||||
return aliasPos;
|
||||
} else {
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
bool _FAT_directory_addEntry (PARTITION* partition, DIR_ENTRY* entry, u32 dirCluster) {
|
||||
u32 entrySize;
|
||||
@ -706,6 +887,8 @@ bool _FAT_directory_addEntry (PARTITION* partition, DIR_ENTRY* entry, u32 dirClu
|
||||
bool entryStillValid;
|
||||
u8 aliasCheckSum = 0;
|
||||
char alias [MAX_ALIAS_LENGTH];
|
||||
int aliasLen;
|
||||
int lfnLen;
|
||||
|
||||
// Make sure the filename is not 0 length
|
||||
if (strnlen (entry->filename, MAX_FILENAME_LENGTH) < 1) {
|
||||
@ -713,7 +896,8 @@ bool _FAT_directory_addEntry (PARTITION* partition, DIR_ENTRY* entry, u32 dirClu
|
||||
}
|
||||
|
||||
// Make sure the filename is at least a valid LFN
|
||||
if ( !(_FAT_directory_isValidLfn (entry->filename))) {
|
||||
lfnLen = _FAT_directory_lfnLength (entry->filename);
|
||||
if (lfnLen < 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
@ -748,97 +932,84 @@ bool _FAT_directory_addEntry (PARTITION* partition, DIR_ENTRY* entry, u32 dirClu
|
||||
entry->entryData[0] = '.';
|
||||
entry->entryData[1] = '.';
|
||||
entrySize = 1;
|
||||
} else if ( _FAT_directory_isValidAlias (entry->filename)) {
|
||||
// Short filename
|
||||
strupr (entry->filename);
|
||||
entrySize = 1;
|
||||
// Copy into alias
|
||||
for (i = 0, j = 0; (j < 8) && (entry->filename[i] != '.') && (entry->filename[i] != '\0'); i++, j++) {
|
||||
entry->entryData[j] = entry->filename[i];
|
||||
}
|
||||
while (j < 8) {
|
||||
entry->entryData[j] = ' ';
|
||||
++ j;
|
||||
}
|
||||
if (entry->filename[i] == '.') {
|
||||
// Copy extension
|
||||
++ i;
|
||||
while ((entry->filename[i] != '\0') && (j < 11)) {
|
||||
entry->entryData[j] = entry->filename[i];
|
||||
++ i;
|
||||
++ j;
|
||||
}
|
||||
}
|
||||
while (j < 11) {
|
||||
entry->entryData[j] = ' ';
|
||||
++ j;
|
||||
}
|
||||
} else {
|
||||
// Long filename needed
|
||||
entrySize = ((strnlen (entry->filename, MAX_FILENAME_LENGTH) + LFN_ENTRY_LENGTH - 1) / LFN_ENTRY_LENGTH) + 1;
|
||||
// Generate alias
|
||||
tmpCharPtr = strrchr (entry->filename, '.');
|
||||
if (tmpCharPtr == NULL) {
|
||||
tmpCharPtr = strrchr (entry->filename, '\0');
|
||||
}
|
||||
for (i = 0, j = 0; (j < 6) && (entry->filename + i < tmpCharPtr); i++) {
|
||||
if ( isalnum(entry->filename[i])) {
|
||||
alias[j] = entry->filename[i];
|
||||
++ j;
|
||||
}
|
||||
}
|
||||
while (j < 8) {
|
||||
alias[j] = '_';
|
||||
++ j;
|
||||
}
|
||||
tmpCharPtr = strrchr (entry->filename, '.');
|
||||
if (tmpCharPtr != NULL) {
|
||||
alias[8] = '.';
|
||||
// Copy extension
|
||||
while ((tmpCharPtr != '\0') && (j < 12)) {
|
||||
alias[j] = tmpCharPtr[0];
|
||||
++ tmpCharPtr;
|
||||
++ j;
|
||||
}
|
||||
alias[j] = '\0';
|
||||
} else {
|
||||
for (j = 8; j < MAX_ALIAS_LENGTH; j++) {
|
||||
alias[j] = '\0';
|
||||
}
|
||||
}
|
||||
|
||||
// Get a valid tail number
|
||||
alias[5] = '~';
|
||||
i = 0;
|
||||
do {
|
||||
i++;
|
||||
alias[6] = '0' + ((i / 10) % 10); // 10's digit
|
||||
alias[7] = '0' + (i % 10); // 1's digit
|
||||
} while (_FAT_directory_entryExists (partition, alias, dirCluster) && (i < 100));
|
||||
if (i == 100) {
|
||||
// Couldn't get a tail number
|
||||
// Normal file name
|
||||
aliasLen = _FAT_directory_createAlias (alias, entry->filename);
|
||||
if (aliasLen < 0) {
|
||||
return false;
|
||||
}
|
||||
|
||||
// Make it upper case
|
||||
strupr (alias);
|
||||
|
||||
// Now copy it into the directory entry data
|
||||
memcpy (entry->entryData, alias, 8);
|
||||
memcpy (entry->entryData + 8, alias + 9, 3);
|
||||
for (i = 0; i < 10; i++) {
|
||||
if (entry->entryData[i] < 0x20) {
|
||||
// Replace null and control characters with spaces
|
||||
entry->entryData[i] = 0x20;
|
||||
} else if (aliasLen == 0) {
|
||||
// It's a normal short filename
|
||||
entrySize = 1;
|
||||
// Copy into alias
|
||||
for (i = 0, j = 0; (j < 8) && (alias[i] != '.') && (alias[i] != '\0'); i++, j++) {
|
||||
entry->entryData[j] = alias[i];
|
||||
}
|
||||
while (j < 8) {
|
||||
entry->entryData[j] = ' ';
|
||||
++ j;
|
||||
}
|
||||
if (entry->filename[i] == '.') {
|
||||
// Copy extension
|
||||
++ i;
|
||||
while ((alias[i] != '\0') && (j < 11)) {
|
||||
entry->entryData[j] = alias[i];
|
||||
++ i;
|
||||
++ j;
|
||||
}
|
||||
}
|
||||
while (j < 11) {
|
||||
entry->entryData[j] = ' ';
|
||||
++ j;
|
||||
}
|
||||
} else {
|
||||
// It's a long filename with an alias
|
||||
entrySize = ((lfnLen + LFN_ENTRY_LENGTH - 1) / LFN_ENTRY_LENGTH) + 1;
|
||||
// expand primary part to 8 characters long by padding the end with underscores
|
||||
i = MAX_ALIAS_LENGTH - MAX_ALIAS_EXT_LENGTH - 2; // 1 char for '.', one for NUL, 3 for extension
|
||||
// Move extension to last 3 characters
|
||||
while (alias[i] != '.' && i > 0) i--;
|
||||
if (i > 0) {
|
||||
j = MAX_ALIAS_LENGTH - MAX_ALIAS_EXT_LENGTH - 2; // 1 char for '.', one for NUL, 3 for extension
|
||||
memmove (alias + j, alias + i, strlen(alias) - i);
|
||||
// Pad primary component
|
||||
memset (alias + i, '_', j - i);
|
||||
}
|
||||
|
||||
// Generate numeric tail
|
||||
for (i = 1; i <= MAX_NUMERIC_TAIL; i++) {
|
||||
j = i;
|
||||
tmpCharPtr = alias + MAX_ALIAS_PRI_LENGTH - 1;
|
||||
while (j > 0) {
|
||||
*tmpCharPtr = j % 10;
|
||||
tmpCharPtr--;
|
||||
j /= 10;
|
||||
}
|
||||
*tmpCharPtr = '~';
|
||||
if (!_FAT_directory_entryExists (partition, alias, dirCluster)) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (i > MAX_NUMERIC_TAIL) {
|
||||
// Couldn't get a valid alias
|
||||
return false;
|
||||
}
|
||||
|
||||
// Now copy it into the directory entry data
|
||||
memcpy (entry->entryData, alias, MAX_ALIAS_PRI_LENGTH);
|
||||
memcpy (entry->entryData + MAX_ALIAS_PRI_LENGTH, alias + MAX_ALIAS_PRI_LENGTH + 1, MAX_ALIAS_EXT_LENGTH);
|
||||
for (i = 0; i < MAX_ALIAS_PRI_LENGTH+MAX_ALIAS_EXT_LENGTH; i++) {
|
||||
if (entry->entryData[i] < ' ') {
|
||||
// Replace null and control characters with spaces
|
||||
entry->entryData[i] = ' ';
|
||||
}
|
||||
}
|
||||
// Generate alias checksum
|
||||
for (i=0; i < MAX_ALIAS_PRI_LENGTH+MAX_ALIAS_EXT_LENGTH; i++)
|
||||
{
|
||||
// NOTE: The operation is an unsigned char rotate right
|
||||
aliasCheckSum = ((aliasCheckSum & 1) ? 0x80 : 0) + (aliasCheckSum >> 1) + entry->entryData[i];
|
||||
}
|
||||
}
|
||||
// Generate alias checksum
|
||||
for (i=0; i < 11; i++)
|
||||
{
|
||||
// NOTE: The operation is an unsigned char rotate right
|
||||
aliasCheckSum = ((aliasCheckSum & 1) ? 0x80 : 0) + (aliasCheckSum >> 1) + entry->entryData[i];
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
// Find or create space for the entry
|
||||
@ -849,32 +1020,38 @@ bool _FAT_directory_addEntry (PARTITION* partition, DIR_ENTRY* entry, u32 dirClu
|
||||
// Write out directory entry
|
||||
curEntryPos = entry->dataStart;
|
||||
|
||||
for (entryStillValid = true, i = entrySize; entryStillValid && i > 0;
|
||||
entryStillValid = _FAT_directory_incrementDirEntryPosition (partition, &curEntryPos, false), -- i )
|
||||
{
|
||||
if (i > 1) {
|
||||
// Long filename entry
|
||||
lfnEntry[LFN_offset_ordinal] = (i - 1) | (i == entrySize ? LFN_END : 0);
|
||||
for (j = 0; j < 13; j++) {
|
||||
if (entry->filename [(i - 2) * 13 + j] == '\0') {
|
||||
if ((j > 1) && (entry->filename [(i - 2) * 13 + (j-1)] == '\0')) {
|
||||
u16_to_u8array (lfnEntry, LFN_offset_table[j], 0xffff); // Padding
|
||||
} else {
|
||||
u16_to_u8array (lfnEntry, LFN_offset_table[j], 0x0000); // Terminating null character
|
||||
}
|
||||
} else {
|
||||
u16_to_u8array (lfnEntry, LFN_offset_table[j], entry->filename [(i - 2) * 13 + j]);
|
||||
}
|
||||
}
|
||||
// lfn is only pushed onto the stack here, reducing overall stack usage
|
||||
ucs2_t lfn[MAX_LFN_LENGTH];
|
||||
_FAT_directory_mbstoucs2 (lfn, entry->filename, MAX_LFN_LENGTH);
|
||||
|
||||
lfnEntry[LFN_offset_checkSum] = aliasCheckSum;
|
||||
lfnEntry[LFN_offset_flag] = ATTRIB_LFN;
|
||||
lfnEntry[LFN_offset_reserved1] = 0;
|
||||
u16_to_u8array (lfnEntry, LFN_offset_reserved2, 0);
|
||||
_FAT_cache_writePartialSector (partition->cache, lfnEntry, _FAT_fat_clusterToSector(partition, curEntryPos.cluster) + curEntryPos.sector, curEntryPos.offset * DIR_ENTRY_DATA_SIZE, DIR_ENTRY_DATA_SIZE);
|
||||
} else {
|
||||
// Alias & file data
|
||||
_FAT_cache_writePartialSector (partition->cache, entry->entryData, _FAT_fat_clusterToSector(partition, curEntryPos.cluster) + curEntryPos.sector, curEntryPos.offset * DIR_ENTRY_DATA_SIZE, DIR_ENTRY_DATA_SIZE);
|
||||
for (entryStillValid = true, i = entrySize; entryStillValid && i > 0;
|
||||
entryStillValid = _FAT_directory_incrementDirEntryPosition (partition, &curEntryPos, false), -- i )
|
||||
{
|
||||
if (i > 1) {
|
||||
// Long filename entry
|
||||
lfnEntry[LFN_offset_ordinal] = (i - 1) | (i == entrySize ? LFN_END : 0);
|
||||
for (j = 0; j < 13; j++) {
|
||||
if (entry->filename [(i - 2) * 13 + j] == '\0') {
|
||||
if ((j > 1) && (entry->filename [(i - 2) * 13 + (j-1)] == '\0')) {
|
||||
u16_to_u8array (lfnEntry, LFN_offset_table[j], 0xffff); // Padding
|
||||
} else {
|
||||
u16_to_u8array (lfnEntry, LFN_offset_table[j], 0x0000); // Terminating null character
|
||||
}
|
||||
} else {
|
||||
u16_to_u8array (lfnEntry, LFN_offset_table[j], lfn [(i - 2) * 13 + j]);
|
||||
}
|
||||
}
|
||||
|
||||
lfnEntry[LFN_offset_checkSum] = aliasCheckSum;
|
||||
lfnEntry[LFN_offset_flag] = ATTRIB_LFN;
|
||||
lfnEntry[LFN_offset_reserved1] = 0;
|
||||
u16_to_u8array (lfnEntry, LFN_offset_reserved2, 0);
|
||||
_FAT_cache_writePartialSector (partition->cache, lfnEntry, _FAT_fat_clusterToSector(partition, curEntryPos.cluster) + curEntryPos.sector, curEntryPos.offset * DIR_ENTRY_DATA_SIZE, DIR_ENTRY_DATA_SIZE);
|
||||
} else {
|
||||
// Alias & file data
|
||||
_FAT_cache_writePartialSector (partition->cache, entry->entryData, _FAT_fat_clusterToSector(partition, curEntryPos.cluster) + curEntryPos.sector, curEntryPos.offset * DIR_ENTRY_DATA_SIZE, DIR_ENTRY_DATA_SIZE);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
@ -28,6 +28,9 @@
|
||||
|
||||
2006-07-11 - Chishm
|
||||
* Original release
|
||||
|
||||
2007-11-01 - Chishm
|
||||
* Added unicode support
|
||||
*/
|
||||
|
||||
#ifndef _DIRECTORY_H
|
||||
@ -39,9 +42,13 @@
|
||||
#include "partition.h"
|
||||
|
||||
#define DIR_ENTRY_DATA_SIZE 0x20
|
||||
#define MAX_FILENAME_LENGTH 256
|
||||
#define MAX_LFN_LENGTH 256
|
||||
#define MAX_FILENAME_LENGTH 768 // 256 UCS-2 characters encoded into UTF-8 can use up to 768 UTF-8 chars
|
||||
#define MAX_ALIAS_LENGTH 13
|
||||
#define LFN_ENTRY_LENGTH 13
|
||||
#define MAX_ALIAS_EXT_LENGTH 3
|
||||
#define MAX_ALIAS_PRI_LENGTH 8
|
||||
#define MAX_NUMERIC_TAIL 999999
|
||||
#define FAT16_ROOT_DIR_CLUSTER 0
|
||||
|
||||
#define DIR_SEPARATOR '/'
|
||||
|
||||
Loading…
Reference in New Issue
Block a user