Zlib license terms

The license does not require source code to be made available if distributing binary code. Anonymous Not logged in Create account Log in. Hand W iki. From HandWiki. Namespaces Software Discussion. More More Languages. Short description : Permissive free software license.

Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. For over 20 years the Open Source Initiative OSI has worked to raise awareness and adoption of open source software, and build bridges between open source communities of practice. As a global non-profit , the OSI champions software freedom in society through education, collaboration, and infrastructure, stewarding the Open Source Definition OSD , and preventing abuse of the ideals and ethos inherent to the open source movement.

Open source software is made by many people and distributed under an OSD-compliant license which grants all the rights to use, study, change, and share the software in modified and unmodified form.

Software freedom is essential to enabling community development of open source software. For raw deflate or gzip encoding, a request for a byte window is.

The memLevel parameter specifies how much memory should be allocated. The default value is 8. See zconf. The strategy parameter is used to tune the compression algorithm. Use the. Filtered data consists mostly of small values with a somewhat. In this case, the compression algorithm is tuned to. Initializes the compression dictionary from the given byte sequence.

When using the zlib format, this. When doing raw deflate, this. The dictionary should consist of strings byte sequences that are likely.

Using a. Depending on the size of the compression data structures selected by. Thus the strings most likely to be. The Adler value. If a raw deflate was requested, then the. Returns the sliding dictionary being maintained by deflate. If deflateGetDictionary is called with dictionary equal to. It may return up. If the application needs the last window-size bytes of. Sets the destination stream as a complete copy of the source stream. This function can be useful when several compression strategies will be.

The streams that will be discarded should then be freed. Note that deflateCopy duplicates the internal. This function is equivalent to deflateEnd followed by deflateInit, but. The stream.

Dynamically update the compression level and compression strategy. This can be. If the compression approach which is a function of the level or the. There are three approaches. The new level. In this case, deflateParams can be called again with the.

In order to assure a change in the parameters on the first try, the. Then no more input data should be provided before the deflateParams call. If this is done, the old level and strategy will be applied to the data. Note that. A return. Fine tune deflate's internal compression parameters. This should only be. Read the deflate. It must be called after deflateInit or. This would be used. If that first deflate call is provided the.

Note that it is possible for the compressed size to. The bytes not. The number of bits of output not provided are between 0 and 7, where they. If pending. The intent. As such, this.

The text, time, os, extra field, name, and comment information. If hcrc is true, a gzip header crc is included. If deflateSetHeader is not used, the default gzip header has text false,.

The gzip header is returned to the default state by deflateReset. This is another version of inflateInit with an extra parameter. The windowBits parameter is the base two logarithm of the maximum window. The default value is 15 if inflateInit is used. If a compressed stream with a larger window.

Those formats provide their own check values. If a custom. Note that comments. CRC instead of an Adler Unlike the gunzip utility and gzread see. The state. The current implementation. Initializes the decompression dictionary from the given uncompressed byte.

This function must be called immediately after a call of inflate,. The dictionary chosen by the compressor. The compressor and decompressor must use exactly the same dictionary see. For raw inflate, this function can be called at any. If the provided dictionary is smaller than the. The application must insure that the dictionary.

Returns the sliding dictionary being maintained by inflate. If inflateGetDictionary is called with dictionary equal to. Skips invalid compressed data until a possible full flush point see above. No output is provided. All full flush points have this pattern, but not all occurrences of this. In the success case, the application may save the current current value of.

In the. This function can be useful when randomly accessing a large stream. This function is equivalent to inflateEnd followed by inflateInit,. This function is the same as inflateReset, but it also permits changing. The windowBits parameter is interpreted. If the window size is changed, then the.

This function inserts bits in the inflate input stream. The intent is. The provided bits will be used before any bytes are used. This function should only be used with raw inflate, and. If bits is negative, then the input stream bit buffer is emptied. This is used. This function returns two values, one in the lower 16 bits of the return. If the upper value is -1 and the lower value is. If the upper value is -1 and the lower value is non-zero, then inflate is in. If the upper value is not -1, then.

A code is being processed if inflate is waiting for more input to complete. If a zlib stream is. The text, time, xflags, and os fields are filled in with the gzip header. The header CRC. Once done is true,. When any. This allows the use of deflateSetHeader with the returned. However if those fields are set to. If inflateGetHeader is not used, then the header information is simply.

The header is always checked for validity, including the header. CRC if present. The application would need to call inflateGetHeader again to. Initialize the internal stream state for decompression using inflateBack. The fields zalloc, zfree and opaque in strm must be initialized. Except for special applications where it is. See inflateBack for the usage of these routines. This is potentially more efficient than. A raw deflate stream is one with no zlib or gzip header or trailer.

This routine would normally be used in a utility that reads zip or gzip. The utility would decode the. This is different from the default.

The function's. If out. Neither in nor. The length written by out will be at most the window size. Any non-zero. For convenience, inflateBack can be provided input on the first call by. If that input is exhausted, then. Note that inflateBack.