A small `GZIP` unpacker. Example: import "core:bytes" import "core:os" import "core:compress" import "core:compress/gzip" import "core:fmt" // Small GZIP file with fextra, fname and fcomment present. @private TEST: []u8 = { 0x1f, 0x8b, 0x08, 0x1c, 0xcb, 0x3b, 0x3a, 0x5a, 0x02, 0x03, 0x07, 0x00, 0x61, 0x62, 0x03, 0x00, 0x63, 0x64, 0x65, 0x66, 0x69, 0x6c, 0x65, 0x6e, 0x61, 0x6d, 0x65, 0x00, 0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x61, 0x20, 0x63, 0x6f, 0x6d, 0x6d, 0x65, 0x6e, 0x74, 0x00, 0x2b, 0x48, 0xac, 0xcc, 0xc9, 0x4f, 0x4c, 0x01, 0x00, 0x15, 0x6a, 0x2c, 0x42, 0x07, 0x00, 0x00, 0x00, } main :: proc() { // Set up output buffer. buf: bytes.Buffer defer bytes.buffer_destroy(&buf) stdout :: proc(s: string) { os.write_string(os.stdout, s) } stderr :: proc(s: string) { os.write_string(os.stderr, s) } if len(os.args) < 2 { stderr("No input file specified.\n") err := gzip.load(data=TEST, buf=&buf, known_gzip_size=len(TEST)) if err == nil { stdout("Displaying test vector: \"") stdout(bytes.buffer_to_string(&buf)) stdout("\"\n") } else { fmt.printf("gzip.load returned %v\n", err) } bytes.buffer_destroy(&buf) os.exit(0) } for file in os.args[1:] { err: gzip.Error if file == "-" { // Read from stdin ctx := &compress.Context_Stream_Input{ input = os.stdin.stream, } err = gzip.load(ctx, &buf) } else { err = gzip.load(file, &buf) } switch err { case nil: stdout(bytes.buffer_to_string(&buf)) case gzip.E_General.File_Not_Found: stderr("File not found: ") stderr(file) stderr("\n") os.exit(1) case: stderr("GZIP returned an error.\n") os.exit(2) } } }

Collection Info

View Source
Collection
core
Path
compress/gzip
Entries
18
Constants 2
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GZIP_MAX_PAYLOAD_SIZE OS_Name
Types 12
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Compression Compression_Flags E_Deflate E_General E_GZIP E_ZLIB Error Header Header_Flag Header_Flags Magic OS
Procedures 3
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load_from_bytes load_from_context load_from_file
Procedure Groups 1
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load
Variables 0

Source Files

Constants

2

GZIP_MAX_PAYLOAD_SIZE #

Source 
GZIP_MAX_PAYLOAD_SIZE :: i64(max(u32le))

OS_Name #

Source 
OS_Name :: #sparse[OS]string{._Unknown = "", .FAT = "FAT", .Amiga = "Amiga", .VMS = "VMS/OpenVMS", .Unix = "Unix", .VM_CMS = "VM/CMS", .Atari_TOS = "Atari TOS", .HPFS = "HPFS", .Macintosh = "Macintosh", .Z_System = "Z-System", .CP_M = "CP/M", .TOPS_20 = "TOPS-20", .NTFS = "NTFS", .QDOS = "QDOS", .Acorn_RISCOS = "Acorn RISCOS", .Unknown = "Unknown"}

Types

12

Procedures

3

load_from_bytes #

Source 
load_from_bytes :: proc(data: []u8, buf: ^Buffer, known_gzip_size: int = -1, expected_output_size: int = -1, allocator := context.allocator) -> (err: Error) {…}

load_from_context #

Source 
load_from_context :: proc(z: ^$C, buf: ^Buffer, known_gzip_size: int = -1, expected_output_size: int = -1, allocator := context.allocator) -> (err: Error) {…}

Procedure Groups

1