Module: Zlib

Defined in:
zlib.c

Overview

GZIP_SUPPORT

Defined Under Namespace

Classes: BufError, DataError, Deflate, Error, GzipFile, GzipReader, GzipWriter, Inflate, MemError, NeedDict, StreamEnd, StreamError, VersionError, ZStream

Constant Summary collapse

VERSION = 
rb_str_new2(RUBY_ZLIB_VERSION)
ZLIB_VERSION = 
rb_str_new2(ZLIB_VERSION)
BINARY = 
INT2FIX(Z_BINARY)
ASCII = 
INT2FIX(Z_ASCII)
UNKNOWN = 
INT2FIX(Z_UNKNOWN)
NO_COMPRESSION = 
INT2FIX(Z_NO_COMPRESSION)
BEST_SPEED = 
INT2FIX(Z_BEST_SPEED)
BEST_COMPRESSION = 
INT2FIX(Z_BEST_COMPRESSION)
DEFAULT_COMPRESSION = 
INT2FIX(Z_DEFAULT_COMPRESSION)
FILTERED = 
INT2FIX(Z_FILTERED)
HUFFMAN_ONLY = 
INT2FIX(Z_HUFFMAN_ONLY)
DEFAULT_STRATEGY = 
INT2FIX(Z_DEFAULT_STRATEGY)
MAX_WBITS = 
INT2FIX(MAX_WBITS)
DEF_MEM_LEVEL = 
INT2FIX(DEF_MEM_LEVEL)
MAX_MEM_LEVEL = 
INT2FIX(MAX_MEM_LEVEL)
NO_FLUSH = 
INT2FIX(Z_NO_FLUSH)
SYNC_FLUSH = 
INT2FIX(Z_SYNC_FLUSH)
FULL_FLUSH = 
INT2FIX(Z_FULL_FLUSH)
FINISH = 
INT2FIX(Z_FINISH)
OS_CODE = 
INT2FIX(OS_CODE)
OS_MSDOS = 
INT2FIX(OS_MSDOS)
OS_AMIGA = 
INT2FIX(OS_AMIGA)
OS_VMS = 
INT2FIX(OS_VMS)
OS_UNIX = 
INT2FIX(OS_UNIX)
OS_ATARI = 
INT2FIX(OS_ATARI)
OS_OS2 = 
INT2FIX(OS_OS2)
OS_MACOS = 
INT2FIX(OS_MACOS)
OS_TOPS20 = 
INT2FIX(OS_TOPS20)
OS_WIN32 = 
INT2FIX(OS_WIN32)
OS_VMCMS = 
INT2FIX(OS_VMCMS)
OS_ZSYSTEM = 
INT2FIX(OS_ZSYSTEM)
OS_CPM = 
INT2FIX(OS_CPM)
OS_QDOS = 
INT2FIX(OS_QDOS)
OS_RISCOS = 
INT2FIX(OS_RISCOS)
OS_UNKNOWN = 
INT2FIX(OS_UNKNOWN)

Class Method Summary collapse

Class Method Details

.adler32(string, adler) ⇒ Object

Calculates Alder-32 checksum for string, and returns updated value of adler. If string is omitted, it returns the Adler-32 initial value. If adler is omitted, it assumes that the initial value is given to adler.

FIXME: expression.




# File 'zlib.c'

/*
 * call-seq: Zlib.adler32(string, adler)
 *
 * Calculates Alder-32 checksum for +string+, and returns updated value of
 * +adler+. If +string+ is omitted, it returns the Adler-32 initial value. If
 * +adler+ is omitted, it assumes that the initial value is given to +adler+.
 *
 * FIXME: expression.
 */
static VALUE
rb_zlib_adler32(argc, argv, klass)
    int argc;
    VALUE *argv;
    VALUE klass;
{
    return do_checksum(argc, argv, adler32);
}

.crc32(string, adler) ⇒ Object

Calculates CRC checksum for string, and returns updated value of crc. If string is omitted, it returns the CRC initial value. If crc is omitted, it assumes that the initial value is given to crc.

FIXME: expression.




# File 'zlib.c'

/*
 * call-seq: Zlib.crc32(string, adler)
 *
 * Calculates CRC checksum for +string+, and returns updated value of +crc+. If
 * +string+ is omitted, it returns the CRC initial value. If +crc+ is omitted, it
 * assumes that the initial value is given to +crc+.
 *
 * FIXME: expression.
 */
static VALUE
rb_zlib_crc32(argc, argv, klass)
    int argc;
    VALUE *argv;
    VALUE klass;
{
    return do_checksum(argc, argv, crc32);
}

.crc_table ⇒ Object

Returns the table for calculating CRC checksum as an array.




# File 'zlib.c'

/*
 * Returns the table for calculating CRC checksum as an array.
 */
static VALUE
rb_zlib_crc_table(obj)
    VALUE obj;
{
    const unsigned long *crctbl;
    VALUE dst;
    int i;

    crctbl = get_crc_table();
    dst = rb_ary_new2(256);

    for (i = 0; i < 256; i++) {
    rb_ary_push(dst, rb_uint2inum(crctbl[i]));
    }
    return dst;
}

.zlib_version ⇒ Object

Returns the string which represents the version of zlib library.




# File 'zlib.c'

/*
 * Returns the string which represents the version of zlib library.
 */
static VALUE
rb_zlib_version(klass)
    VALUE klass;
{
    VALUE str;

    str = rb_str_new2(zlibVersion());
    OBJ_TAINT(str);  /* for safe */
    return str;
}