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Ensured SSD and ADFs are grown if required.

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This commit is contained in:
Thomas Harte 2016-12-30 18:08:12 -05:00
parent 07dacff42d
commit 3b29e6a473
4 changed files with 25 additions and 2 deletions
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4
Storage/Disk/Formats/AcornADF.cpp
View File

@ -111,6 +111,8 @@ void AcornADF::store_updated_track_at_position(unsigned int head, unsigned int p
}
std::lock_guard<std::mutex> lock_guard(file_access_mutex);
fseek(file_, get_file_offset_for_position(head, position), SEEK_SET);
long file_offset = get_file_offset_for_position(head, position);
ensure_file_is_at_least_length(file_offset);
fseek(file_, file_offset, SEEK_SET);
fwrite(parsed_track.data(), 1, parsed_track.size(), file_);
}

4
Storage/Disk/Formats/SSD.cpp
View File

@ -106,6 +106,8 @@ void SSD::store_updated_track_at_position(unsigned int head, unsigned int positi
}
std::lock_guard<std::mutex> lock_guard(file_access_mutex);
fseek(file_, get_file_offset_for_position(head, position), SEEK_SET);
long file_offset = get_file_offset_for_position(head, position);
ensure_file_is_at_least_length(file_offset);
fseek(file_, file_offset, SEEK_SET);
fwrite(parsed_track.data(), 1, parsed_track.size(), file_);
}

13
Storage/FileHolder.cpp
View File

@ -85,3 +85,16 @@ uint16_t FileHolder::fgetc16be()
return result;
}
void FileHolder::ensure_file_is_at_least_length(long length)
{
fseek(file_, 0, SEEK_END);
long bytes_to_write = length - ftell(file_);
if(bytes_to_write > 0)
{
uint8_t *empty = new uint8_t[bytes_to_write];
memset(empty, 0, bytes_to_write);
fwrite(empty, sizeof(uint8_t), (size_t)bytes_to_write, file_);
delete[] empty;
}
}

6
Storage/FileHolder.hpp
View File

@ -65,6 +65,12 @@ class FileHolder {
*/
uint16_t fgetc16be();
/*!
Ensures the file is at least @c length bytes long, appending 0s until it is
if necessary.
*/
void ensure_file_is_at_least_length(long length);
FILE *file_;
struct stat file_stats_;
bool is_read_only_;