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// Bindings for [[ libz ; https://zlib.net ]] ZLIB compression library.
package vendor_zlib
import "core:c"
when ODIN_OS == .Windows {
foreign import zlib "libz.lib"
} else when ODIN_OS == .Linux {
foreign import zlib "system:z"
} else {
foreign import zlib "system:z"
}
VERSION :: "1.2.12"
VERNUM :: 0x12c0
VER_MAJOR :: 1
VER_MINOR :: 2
VER_REVISION :: 12
VER_SUBREVISION :: 0
voidp :: rawptr
voidpf :: rawptr
voidpc :: rawptr
Byte :: c.uchar
Bytef :: c.uchar
uInt :: c.uint
uIntf :: c.uint
uLong :: c.ulong
uLongf :: c.ulong
size_t :: c.size_t
off_t :: c.long
off64_t :: i64
crc_t :: u32
alloc_func :: proc "c" (opaque: voidp, items: uInt, size: uInt) -> voidpf
free_func :: proc "c" (opaque: voidp, address: voidpf)
in_func :: proc "c" (rawptr, [^][^]c.uchar) -> c.uint
out_func :: proc "c" (rawptr, [^]c.uchar, c.uint) -> c.int
gzFile_s :: struct {
have: c.uint,
next: [^]c.uchar,
pos: off64_t,
}
gzFile :: ^gzFile_s
z_stream_s :: struct {
next_in: ^Bytef,
avail_in: uInt,
total_in: uLong,
next_out: ^Bytef,
avail_out: uInt,
total_out: uLong,
msg: [^]c.char,
state: rawptr,
zalloc: alloc_func,
zfree: free_func,
opaque: voidpf,
data_type: c.int,
adler: uLong,
reserved: uLong,
}
z_stream :: z_stream_s
z_streamp :: ^z_stream
gz_header_s :: struct {
text: c.int,
time: uLong,
xflags: c.int,
os: c.int,
extra: [^]Bytef,
extra_len: uInt,
extra_max: uInt,
name: [^]Bytef,
name_max: uInt,
comment: [^]Bytef,
comm_max: uInt,
hcrc: c.int,
done: c.int,
}
gz_header :: gz_header_s
gz_headerp :: ^gz_header
// Allowed flush values; see deflate() and inflate() below for details
NO_FLUSH :: 0
PARTIAL_FLUSH :: 1
SYNC_FLUSH :: 2
FULL_FLUSH :: 3
FINISH :: 4
BLOCK :: 5
TREES :: 6
// Return codes for the compression/decompression functions. Negative values are
// errors, positive values are used for special but normal events.
OK :: 0
STREAM_END :: 1
NEED_DICT :: 2
ERRNO :: -1
STREAM_ERROR :: -2
DATA_ERROR :: -3
MEM_ERROR :: -4
BUF_ERROR :: -5
VERSION_ERROR :: -6
// compression levels
NO_COMPRESSION :: 0
BEST_SPEED :: 1
BEST_COMPRESSION :: 9
DEFAULT_COMPRESSION :: -1
// compression strategy; see deflateInit2() below for details
FILTERED :: 1
HUFFMAN_ONLY :: 2
RLE :: 3
FIXED :: 4
DEFAULT_STRATEGY :: 0
// Possible values of the data_type field for deflate()
BINARY :: 0
TEXT :: 1
ASCII :: TEXT // for compatibility with 1.2.2 and earlier
UNKNOWN :: 2
// The deflate compression method (the only one supported in this version)
DEFLATED :: 8
NULL :: 0 // for initializing zalloc, zfree, opaque
version :: Version // for compatibility with versions < 1.0.2
@(default_calling_convention="c")
foreign zlib {
// becase zlib.zlibVersion would be silly to write
@(link_prefix="zlib")
Version :: proc() -> cstring ---
deflate :: proc(strm: z_streamp, flush: c.int) -> c.int ---
deflateEnd :: proc(strm: z_streamp) -> c.int ---
inflate :: proc(strm: z_streamp, flush: c.int) -> c.int ---
inflateEnd :: proc(strm: z_streamp) -> c.int ---
deflateSetDictionary :: proc(strm: z_streamp, dictionary: [^]Bytef, dictLength: uInt) -> c.int ---
deflateGetDictionary :: proc(strm: z_streamp, dictionary: [^]Bytef, dictLength: ^uInt) -> c.int ---
deflateCopy :: proc(dest, source: z_streamp) -> c.int ---
deflateReset :: proc(strm: z_streamp) -> c.int ---
deflateParams :: proc(strm: z_streamp, level, strategy: c.int) -> c.int ---
deflateTune :: proc(strm: z_streamp, good_length, max_lazy, nice_length, max_chain: c.int) -> c.int ---
deflateBound :: proc(strm: z_streamp, sourceLen: uLong) -> uLong ---
deflatePending :: proc(strm: z_streamp, pending: [^]c.uint, bits: [^]c.int) -> c.int ---
deflatePrime :: proc(strm: z_streamp, bits, value: c.int) -> c.int ---
deflateSetHeader :: proc(strm: z_streamp, head: gz_headerp) -> c.int ---
inflateSetDictionary :: proc(strm: z_streamp, dictionary: [^]Bytef, dictLength: uInt) -> c.int ---
inflateGetDictionary :: proc(strm: z_streamp, dictionary: [^]Bytef, dictLength: ^uInt) -> c.int ---
inflateSync :: proc(strm: z_streamp) -> c.int ---
inflateCopy :: proc(dest, source: z_streamp) -> c.int ---
inflateReset :: proc(strm: z_streamp) -> c.int ---
inflateReset2 :: proc(strm: z_streamp, windowBits: c.int) -> c.int ---
inflatePrime :: proc(strm: z_streamp, bits, value: c.int) -> c.int ---
inflateMark :: proc(strm: z_streamp) -> c.long ---
inflateGetHeader :: proc(strm: z_streamp, head: gz_headerp) -> c.int ---
inflateBack :: proc(strm: z_streamp, _in: in_func, in_desc: rawptr, out: out_func, out_desc: rawptr) -> c.int ---
inflateBackEnd :: proc(strm: z_streamp) -> c.int ---
zlibCompileFlags :: proc() -> uLong ---
compress :: proc(dest: [^]Bytef, destLen: ^uLongf, source: [^]Bytef, sourceLen: uLong) -> c.int ---
compress2 :: proc(dest: [^]Bytef, destLen: ^uLongf, source: [^]Bytef, sourceLen: uLong, level: c.int) -> c.int ---
compressBound :: proc(sourceLen: uLong) -> uLong ---
uncompress :: proc(dest: [^]Bytef, destLen: ^uLongf, source: [^]Bytef, sourceLen: uLong) -> c.int ---
uncompress2 :: proc(dest: [^]Bytef, destLen: ^uLongf, source: [^]Bytef, sourceLen: ^uLong) -> c.int ---
gzdopen :: proc(fd: c.int, mode: cstring) -> gzFile ---
gzbuffer :: proc(file: gzFile, size: c.uint) -> c.int ---
gzsetparams :: proc(file: gzFile, level, strategy: c.int) -> c.int ---
gzread :: proc(file: gzFile, buf: voidp, len: c.uint) -> c.int ---
gzfread :: proc(buf: voidp, size, nitems: size_t, file: gzFile) -> size_t ---
gzwrite :: proc(file: gzFile, buf: voidpc, len: c.uint) -> c.int ---
gzfwrite :: proc(buf: voidpc, size, nitems: size_t, file: gzFile) -> size_t ---
gzprintf :: proc(file: gzFile, format: cstring, #c_vararg args: ..any) -> c.int ---
gzputs :: proc(file: gzFile, s: cstring) -> c.int ---
gzgets :: proc(file: gzFile, buf: [^]c.char, len: c.int) -> [^]c.char ---
gzputc :: proc(file: gzFile, ch: c.int) -> c.int ---
gzgetc_ :: proc(file: gzFile) -> c.int --- // backwards compat, not the same as gzget
gzungetc :: proc(ch: c.int, file: gzFile) -> c.int ---
gzflush :: proc(file: gzFile, flush: c.int) -> c.int ---
gzrewind :: proc(file: gzFile) -> c.int ---
gzeof :: proc(file: gzFile) -> c.int ---
gzdirect :: proc(file: gzFile) -> c.int ---
gzclose :: proc(file: gzFile) -> c.int ---
gzclose_r :: proc(file: gzFile) -> c.int ---
gzclose_w :: proc(file: gzFile) -> c.int ---
gzerror :: proc(file: gzFile, errnum: ^c.int) -> cstring ---
gzclearerr :: proc(file: gzFile) ---
adler32 :: proc(adler: uLong, buf: [^]Bytef, len: uInt) -> uLong ---
adler32_z :: proc(adler: uLong, buf: [^]Bytef, len: size_t) -> uLong ---
crc32 :: proc(crc: uLong, buf: [^]Bytef, len: uInt) -> uLong ---
crc32_z :: proc(crc: uLong, buf: [^]Bytef, len: size_t) -> uLong ---
crc32_combine_op :: proc(crc1, crc2, op: uLong) -> uLong ---
gzopen64 :: proc(cstring, cstring) -> gzFile ---
gzseek64 :: proc(gzFile, off64_t, c.int) -> off64_t ---
gztell64 :: proc(gzFile) -> off64_t ---
gzoffset64 :: proc(gzFile) -> off64_t ---
adler32_combine64 :: proc(uLong, uLong, off64_t) -> uLong ---
crc32_combine64 :: proc(uLong, uLong, off64_t) -> uLong ---
crc32_combine_gen64 :: proc(off64_t) -> uLong ---
adler32_combine :: proc(uLong, uLong, off_t) -> uLong ---
crc32_combine :: proc(uLong, uLong, off_t) -> uLong ---
crc32_combine_gen :: proc(off_t) -> uLong ---
zError :: proc(c.int) -> cstring ---
inflateSyncPoint :: proc(z_streamp) -> c.int ---
get_crc_table :: proc() -> [^]crc_t ---
inflateUndermine :: proc(z_streamp, c.int) -> c.int ---
inflateValidate :: proc(z_streamp, c.int) -> c.int ---
inflateCodesUsed :: proc(z_streamp) -> c.ulong ---
inflateResetKeep :: proc(z_streamp) -> c.int ---
deflateResetKeep :: proc(z_streamp) -> c.int ---
}
// Make these private since we create wrappers below passing in version and size
// of the stream structure like zlib.h does
@(private)
@(default_calling_convention="c")
foreign zlib {
deflateInit_ :: proc(strm: z_streamp, level: c.int, version: cstring, stream_size: c.int) -> c.int ---
inflateInit_ :: proc(strm: z_streamp, level: c.int, version: cstring, stream_size: c.int) -> c.int ---
deflateInit2_ :: proc(strm: z_streamp, level, method, windowBits, memLevel, strategy: c.int, version: cstring, stream_size: c.int) -> c.int ---
inflateInit2_ :: proc(strm: z_streamp, windowBits: c.int, version: cstring, stream_size: c.int) -> c.int ---
inflateBackInit_ :: proc(strm: z_streamp, windowBits: c.int, window: [^]c.uchar, version: cstring, stream_size: c.int) -> c.int ---
// see below for explanation
@(link_name="gzgetc")
gzgetc_unique :: proc(file: gzFile) -> c.int ---
}
deflateInit :: #force_inline proc "c" (strm: z_streamp, level: c.int) -> c.int {
return deflateInit_(strm, level, VERSION, c.int(size_of(z_stream)))
}
inflateInit :: #force_inline proc "c" (strm: z_streamp, level: c.int) -> c.int {
return inflateInit_(strm, level, VERSION, c.int(size_of(z_stream)))
}
deflateInit2 :: #force_inline proc "c" (strm: z_streamp, level, method, windowBits, memLevel, strategy: c.int) -> c.int {
return deflateInit2_(strm, level, method, windowBits, memLevel, strategy, VERSION, c.int(size_of(z_stream)))
}
inflateInit2 :: #force_inline proc "c" (strm: z_streamp, windowBits: c.int) -> c.int {
return inflateInit2_(strm, windowBits, VERSION, c.int(size_of(z_stream)))
}
inflateBackInit :: #force_inline proc "c" (strm: z_streamp, windowBits: c.int, window: [^]c.uchar) -> c.int {
return inflateBackInit_(strm, windowBits, window, VERSION, c.int(size_of(z_stream)))
}
// zlib.h redefines gzgetc with a macro and uses (gzgetc)(g) to invoke it from
// inside the same macro (preventing macro expansion), in Odin we give that a
// unique name using link_prefix then implement the body of the macro in our own
// procedure calling the unique named gzgetc instead.
gzgetc :: #force_inline proc(file: gzFile) -> c.int {
if file.have != 0 {
file.have -= 1
file.pos += 1
ch := c.int(file.next[0])
file.next = &file.next[1]
return ch
}
return gzgetc_unique(file)
}
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