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#import "OFDate.h"
#import "OFStream.h"
#import "OFString.h"
#import "OFOutOfRangeException.h"
static OFString *
stringFromBuffer(const unsigned char *buffer, size_t length)
stringFromBuffer(const unsigned char *buffer, size_t length,
of_string_encoding_t encoding)
{
for (size_t i = 0; i < length; i++)
if (buffer[i] == '\0')
length = i;
return [OFString stringWithUTF8String: (const char *)buffer
length: length];
return [OFString stringWithCString: (const char *)buffer
encoding: encoding
length: length];
}
static void
stringToBuffer(unsigned char *buffer, OFString *string, size_t length)
stringToBuffer(unsigned char *buffer, OFString *string, size_t length,
of_string_encoding_t encoding)
{
size_t UTF8StringLength = [string UTF8StringLength];
size_t cStringLength = [string cStringLengthWithEncoding: encoding];
if (UTF8StringLength > length)
if (cStringLength > length)
@throw [OFOutOfRangeException exception];
memcpy(buffer, [string UTF8String], UTF8StringLength);
memcpy(buffer, [string cStringWithEncoding: encoding], cStringLength);
for (size_t i = UTF8StringLength; i < length; i++)
for (size_t i = cStringLength; i < length; i++)
buffer[i] = '\0';
}
static uintmax_t
octalValueFromBuffer(const unsigned char *buffer, size_t length, uintmax_t max)
{
uintmax_t value = 0;
if (length == 0)
return 0;
if (buffer[0] == 0x80) {
for (size_t i = 1; i < length; i++)
value = (value << 8) | buffer[i];
} else
value = [stringFromBuffer(buffer, length) octalValue];
value = [stringFromBuffer(buffer, length,
OF_STRING_ENCODING_ASCII) octalValue];
if (value > max)
@throw [OFOutOfRangeException exception];
return value;
}
@implementation OFTarArchiveEntry
+ (instancetype)entryWithFileName: (OFString *)fileName
{
return [[[self alloc] initWithFileName: fileName] autorelease];
}
- (instancetype)init
{
OF_INVALID_INIT_METHOD
}
- (instancetype)of_initWithHeader: (unsigned char [512])header
encoding: (of_string_encoding_t)encoding
{
self = [super init];
@try {
void *pool = objc_autoreleasePoolPush();
OFString *targetFileName;
_fileName = [stringFromBuffer(header, 100) copy];
_fileName = [stringFromBuffer(header, 100, encoding) copy];
_mode = (uint32_t)octalValueFromBuffer(
header + 100, 8, UINT32_MAX);
_UID = (uint32_t)octalValueFromBuffer(
header + 108, 8, UINT32_MAX);
_GID = (uint32_t)octalValueFromBuffer(
header + 116, 8, UINT32_MAX);
_size = (uint64_t)octalValueFromBuffer(
header + 124, 12, UINT64_MAX);
_modificationDate = [[OFDate alloc]
initWithTimeIntervalSince1970:
(of_time_interval_t)octalValueFromBuffer(
header + 136, 12, UINTMAX_MAX)];
_type = header[156];
targetFileName = stringFromBuffer(header + 157, 100);
targetFileName = stringFromBuffer(header + 157, 100, encoding);
if ([targetFileName length] > 0)
_targetFileName = [targetFileName copy];
if (_type == '\0')
_type = OF_TAR_ARCHIVE_ENTRY_TYPE_FILE;
if (memcmp(header + 257, "ustar\0" "00", 8) == 0) {
OFString *prefix;
_owner = [stringFromBuffer(header + 265, 32) copy];
_group = [stringFromBuffer(header + 297, 32) copy];
_owner = [stringFromBuffer(header + 265, 32, encoding)
copy];
_group = [stringFromBuffer(header + 297, 32, encoding)
copy];
_deviceMajor = (uint32_t)octalValueFromBuffer(
header + 329, 8, UINT32_MAX);
_deviceMinor = (uint32_t)octalValueFromBuffer(
header + 337, 8, UINT32_MAX);
prefix = stringFromBuffer(header + 345, 155);
prefix = stringFromBuffer(header + 345, 155, encoding);
if ([prefix length] > 0) {
OFString *fileName = [OFString
stringWithFormat: @"%@/%@",
prefix, _fileName];
[_fileName release];
_fileName = [fileName copy];
}
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objc_autoreleasePoolPop(pool);
return [ret autorelease];
}
- (void)of_writeToStream: (OFStream *)stream
encoding: (of_string_encoding_t)encoding
{
unsigned char buffer[512];
uint64_t modificationDate;
uint16_t checksum = 0;
stringToBuffer(buffer, _fileName, 100);
stringToBuffer(buffer, _fileName, 100, encoding);
stringToBuffer(buffer + 100,
[OFString stringWithFormat: @"%06" PRIo16 " ", _mode], 8);
[OFString stringWithFormat: @"%06" PRIo16 " ", _mode], 8,
OF_STRING_ENCODING_ASCII);
stringToBuffer(buffer + 108,
[OFString stringWithFormat: @"%06" PRIo16 " ", _UID], 8);
[OFString stringWithFormat: @"%06" PRIo16 " ", _UID], 8,
OF_STRING_ENCODING_ASCII);
stringToBuffer(buffer + 116,
[OFString stringWithFormat: @"%06" PRIo16 " ", _GID], 8);
[OFString stringWithFormat: @"%06" PRIo16 " ", _GID], 8,
OF_STRING_ENCODING_ASCII);
stringToBuffer(buffer + 124,
[OFString stringWithFormat: @"%011" PRIo64 " ", _size], 12);
[OFString stringWithFormat: @"%011" PRIo64 " ", _size], 12,
OF_STRING_ENCODING_ASCII);
modificationDate = [_modificationDate timeIntervalSince1970];
stringToBuffer(buffer + 136,
[OFString stringWithFormat: @"%011" PRIo64 " ", modificationDate],
12);
12, OF_STRING_ENCODING_ASCII);
/*
* During checksumming, the checksum field is expected to be set to 8
* spaces.
*/
memset(buffer + 148, ' ', 8);
buffer[156] = _type;
stringToBuffer(buffer + 157, _targetFileName, 100);
stringToBuffer(buffer + 157, _targetFileName, 100, encoding);
/* ustar */
memcpy(buffer + 257, "ustar\0" "00", 8);
stringToBuffer(buffer + 265, _owner, 32);
stringToBuffer(buffer + 297, _group, 32);
stringToBuffer(buffer + 265, _owner, 32, encoding);
stringToBuffer(buffer + 297, _group, 32, encoding);
stringToBuffer(buffer + 329,
[OFString stringWithFormat: @"%06" PRIo32 " ", _deviceMajor], 8);
[OFString stringWithFormat: @"%06" PRIo32 " ", _deviceMajor], 8,
OF_STRING_ENCODING_ASCII);
stringToBuffer(buffer + 337,
[OFString stringWithFormat: @"%06" PRIo32 " ", _deviceMinor], 8);
[OFString stringWithFormat: @"%06" PRIo32 " ", _deviceMinor], 8,
OF_STRING_ENCODING_ASCII);
memset(buffer + 345, '\0', 155 + 12);
/* Fill in the checksum */
for (size_t i = 0; i < 500; i++)
checksum += buffer[i];
stringToBuffer(buffer + 148,
[OFString stringWithFormat: @"%06" PRIo16, checksum], 7);
[OFString stringWithFormat: @"%06" PRIo16, checksum], 7,
OF_STRING_ENCODING_ASCII);
[stream writeBuffer: buffer
length: sizeof(buffer)];
}
@end
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