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Common: Add a helper function to generate a 8.3 filename from a long one.

Core: Fix the SDMC Directory implementation to make blargSnes work.
This commit is contained in:
Emmanuel Gil Peyrot 2014-09-29 08:34:37 +00:00
parent 19c2a96ab0
commit fbd72fd6bf
5 changed files with 80 additions and 29 deletions

View File

@ -780,6 +780,48 @@ size_t ReadFileToString(bool text_file, const char *filename, std::string &str)
return file.ReadArray(&str[0], str.size());
}
/**
* Splits the filename into 8.3 format
* Loosely implemented following https://en.wikipedia.org/wiki/8.3_filename
* @param filename The normal filename to use
* @param short_name A 9-char array in which the short name will be written
* @param extension A 4-char array in which the extension will be written
*/
void SplitFilename83(const std::string& filename, std::array<char, 9>& short_name,
std::array<char, 4>& extension) {
const std::string forbidden_characters = ".\"/\\[]:;=, ";
// On a FAT32 partition, 8.3 names are stored as a 11 bytes array, filled with spaces.
short_name = {' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', '\0'};
extension = {' ', ' ', ' ', '\0'};
std::string::size_type point = filename.rfind('.');
if (point == filename.size() - 1)
point = filename.rfind('.', point);
// Get short name.
int j = 0;
for (char letter : filename.substr(0, point)) {
if (forbidden_characters.find(letter, 0) != std::string::npos)
continue;
if (j == 8) {
// TODO(Link Mauve): also do that for filenames containing a space.
// TODO(Link Mauve): handle multiple files having the same short name.
short_name[6] = '~';
short_name[7] = '1';
break;
}
short_name[j++] = toupper(letter);
}
// Get extension.
if (point != std::string::npos) {
j = 0;
for (char letter : filename.substr(point + 1, 3))
extension[j++] = toupper(letter);
}
}
IOFile::IOFile()
: m_file(NULL), m_good(true)
{}

View File

@ -4,6 +4,7 @@
#pragma once
#include <array>
#include <fstream>
#include <cstdio>
#include <cstring>
@ -131,6 +132,16 @@ std::string &GetExeDirectory();
size_t WriteStringToFile(bool text_file, const std::string &str, const char *filename);
size_t ReadFileToString(bool text_file, const char *filename, std::string &str);
/**
* Splits the filename into 8.3 format
* Loosely implemented following https://en.wikipedia.org/wiki/8.3_filename
* @param filename The normal filename to use
* @param short_name A 9-char array in which the short name will be written
* @param extension A 4-char array in which the extension will be written
*/
void SplitFilename83(const std::string& filename, std::array<char, 9>& short_name,
std::array<char, 4>& extension);
// simple wrapper for cstdlib file functions to
// hopefully will make error checking easier
// and make forgetting an fclose() harder

View File

@ -19,9 +19,9 @@ namespace FileSys {
const size_t FILENAME_LENGTH = 0x20C / 2;
struct Entry {
char16_t filename[FILENAME_LENGTH]; // Entry name (UTF-16, null-terminated)
char short_name[9]; // 8.3 file name ('longfilename' -> 'LONGFI~1', null-terminated)
std::array<char, 9> short_name; // 8.3 file name ('longfilename' -> 'LONGFI~1', null-terminated)
char unknown1; // unknown (observed values: 0x0A, 0x70, 0xFD)
char extension[4]; // 8.3 file extension (set to spaces for directories, null-terminated)
std::array<char, 4> extension; // 8.3 file extension (set to spaces for directories, null-terminated)
char unknown2; // unknown (always 0x01)
char unknown3; // unknown (0x00 or 0x08)
char is_directory; // directory flag

View File

@ -20,8 +20,8 @@ Directory_SDMC::Directory_SDMC(const Archive_SDMC* archive, const std::string& p
// the root directory we set while opening the archive.
// For example, opening /../../usr/bin can give the emulated program your installed programs.
std::string absolute_path = archive->GetMountPoint() + path;
entry_count = FileUtil::ScanDirectoryTree(absolute_path, entry);
current_entry = 0;
FileUtil::ScanDirectoryTree(absolute_path, directory);
children_iterator = directory.children.begin();
}
Directory_SDMC::~Directory_SDMC() {
@ -35,44 +35,39 @@ Directory_SDMC::~Directory_SDMC() {
* @return Number of entries listed
*/
u32 Directory_SDMC::Read(const u32 count, Entry* entries) {
u32 i;
for (i = 0; i < count && current_entry < entry_count; ++i) {
FileUtil::FSTEntry file = entry.children[current_entry];
std::string filename = file.virtualName;
WARN_LOG(FILESYS, "File %s: size=%d dir=%d", filename.c_str(), file.size, file.isDirectory);
u32 entries_read = 0;
Entry* entry = &entries[i];
while (entries_read < count && children_iterator != directory.children.cend()) {
const FileUtil::FSTEntry& file = *children_iterator;
const std::string& filename = file.virtualName;
Entry& entry = entries[entries_read];
WARN_LOG(FILESYS, "File %s: size=%d dir=%d", filename.c_str(), file.size, file.isDirectory);
// TODO(Link Mauve): use a proper conversion to UTF-16.
for (int j = 0; j < FILENAME_LENGTH; ++j) {
entry->filename[j] = filename[j];
entry.filename[j] = filename[j];
if (!filename[j])
break;
}
// Split the filename into 8.3 format.
// TODO(Link Mauve): move that to common, I guess, and make it more robust to long filenames.
std::string::size_type n = filename.rfind('.');
if (n == std::string::npos) {
strncpy(entry->short_name, filename.c_str(), 8);
memset(entry->extension, '\0', 3);
} else {
strncpy(entry->short_name, filename.substr(0, n).c_str(), 8);
strncpy(entry->extension, filename.substr(n + 1).c_str(), 8);
}
FileUtil::SplitFilename83(filename, entry.short_name, entry.extension);
entry->is_directory = file.isDirectory;
entry->file_size = file.size;
entry.is_directory = file.isDirectory;
entry.is_hidden = (filename[0] == '.');
entry.is_read_only = 0;
entry.file_size = file.size;
// We emulate a SD card where the archive bit has never been cleared, as it would be on
// most user SD cards.
// Some homebrews (blargSNES for instance) are known to mistakenly use the archive bit as a
// file bit.
entry->is_archive = !file.isDirectory;
entry.is_archive = !file.isDirectory;
++current_entry;
++entries_read;
++children_iterator;
}
return i;
return entries_read;
}
/**

View File

@ -37,9 +37,12 @@ public:
bool Close() const override;
private:
u32 entry_count;
u32 current_entry;
FileUtil::FSTEntry entry;
u32 total_entries_in_directory;
FileUtil::FSTEntry directory;
// We need to remember the last entry we returned, so a subsequent call to Read will continue
// from the next one. This iterator will always point to the next unread entry.
std::vector<FileUtil::FSTEntry>::iterator children_iterator;
};
} // namespace FileSys