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https://github.com/WerWolv/ImHex-Patterns.git
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ba36826e2d
* patterns: add tar support * readme: add tar entry * patterns: update tar file Co-authored-by: favaioos <120850826+favaioos@users.noreply.github.com>
89 lines
2.9 KiB
Rust
89 lines
2.9 KiB
Rust
#pragma MIME application/tar
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#pragma MIME application/x-tar
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#pragma endian little
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#include <std/string.pat>
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#include <std/time.pat>
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#include <std/mem.pat>
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#include <std/sys.pat>
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#define HEADER "ustar "
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#define NULL "\x00"
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fn octal_to_decimal(str value) {
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return std::string::parse_int(value, 8);
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};
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fn get_time(str time) {
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std::time::EpochTime epochtime = octal_to_decimal(time);
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std::time::Time localtime = std::time::to_local(epochtime);
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return std::time::format(localtime, "%c");
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};
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enum typeflagenum : char {
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regular = '0',
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also_regular = '\x00',
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link_to_another_file_already_archived = '1',
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symbolic_link = '2',
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character_special_device = '3',
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block_special_device = '4',
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directory = '5',
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fifo_special_file = '6',
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reserved = '7'
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};
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struct posix_header {
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char name[100] [[name("file name")]];
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char mode[8] [[name("file mode")]];
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char uid[8] [[name("user id of the file")]];
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char gid[8] [[name("group if of the file")]];
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char size[12] [[name("size of the file in octal")]];
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char mtime[12] [[name("modified time of file in epoch time")]];
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char chksum[8] [[name("checksum")]];
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typeflagenum typeflag [[name("type of file")]];
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char linkname[100] [[name("name of link")]];
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char magic[6] [[name("magic bytes that identifies the 'file version'")]];
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char version[2] [[name("version (also used with magic bytes)")]];
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char uname[32] [[name("username of the owner of the file")]];
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char gname[32] [[name("group name of the owner of the file")]];
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char devmajor[8] [[name("major device numbers")]];
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char devminor[8] [[name("minor device numbers")]];
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char prefix[155] [[name("filename prefix")]];
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char reserved[12] [[name("reserved")]];
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};
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struct tar {
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posix_header header_raw;
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char file[octal_to_decimal(header_raw.size)];
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std::print("-" * 50);
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std::print("File Name: {}", header_raw.name);
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std::print("File Permissions: {}" , header_raw.mode);
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std::print("UID: {}", header_raw.uid);
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std::print("GUID: {}", header_raw.gid);
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std::print("Size: {} bytes", octal_to_decimal(header_raw.size));
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std::print("Modified Time: {}", get_time(header_raw.mtime));
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std::print("Checksum: {}", header_raw.chksum);
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std::print("Type of File: {}", header_raw.typeflag);
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std::print("Magic Bytes: {}", header_raw.magic);
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std::print("Version: {}", header_raw.version);
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std::print("uname: {}", header_raw.uname);
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std::print("gname: {}", header_raw.gname);
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std::print("devmajor: {}", header_raw.devmajor);
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std::print("devminor: {}", header_raw.devminor);
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std::print("prefix: {}", header_raw.prefix);
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char empty[while (std::mem::read_string($, 1) == NULL && !std::mem::eof())];
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if (std::mem::eof()) {
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break;
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}
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};
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char magic[6] @ 0x00000101 [[hidden]];
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std::assert(magic == HEADER, "Magic bytes are not correct! Perhaps wrong file?");
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tar tar[while(!std::mem::eof())] @ 0x000;
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