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-/* blast.h -- interface for blast.c
- Copyright (C) 2003 Mark Adler
- version 1.1, 16 Feb 2003
-
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the author be held liable for any damages
- arising from the use of this software.
-
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
-
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- 3. This notice may not be removed or altered from any source distribution.
-
- Mark Adler madler@alumni.caltech.edu
- */
-
-
-/*
- * blast() decompresses the PKWare Data Compression Library (DCL) compressed
- * format. It provides the same functionality as the explode() function in
- * that library. (Note: PKWare overused the "implode" verb, and the format
- * used by their library implode() function is completely different and
- * incompatible with the implode compression method supported by PKZIP.)
- */
-
-
-typedef unsigned (*blast_in)(void *how, unsigned char **buf);
-typedef int (*blast_out)(void *how, unsigned char *buf, unsigned len);
-/* Definitions for input/output functions passed to blast(). See below for
- * what the provided functions need to do.
- */
-
-
-int blast(blast_in infun, void *inhow, blast_out outfun, void *outhow);
-/* Decompress input to output using the provided infun() and outfun() calls.
- * On success, the return value of blast() is zero. If there is an error in
- * the source data, i.e. it is not in the proper format, then a negative value
- * is returned. If there is not enough input available or there is not enough
- * output space, then a positive error is returned.
- *
- * The input function is invoked: len = infun(how, &buf), where buf is set by
- * infun() to point to the input buffer, and infun() returns the number of
- * available bytes there. If infun() returns zero, then blast() returns with
- * an input error. (blast() only asks for input if it needs it.) inhow is for
- * use by the application to pass an input descriptor to infun(), if desired.
- *
- * The output function is invoked: err = outfun(how, buf, len), where the bytes
- * to be written are buf[0..len-1]. If err is not zero, then blast() returns
- * with an output error. outfun() is always called with len <= 4096. outhow
- * is for use by the application to pass an output descriptor to outfun(), if
- * desired.
- *
- * The return codes are:
- *
- * 2: ran out of input before completing decompression
- * 1: output error before completing decompression
- * 0: successful decompression
- * -1: literal flag not zero or one
- * -2: dictionary size not in 4..6
- * -3: distance is too far back
- *
- * At the bottom of blast.c is an example program that uses blast() that can be
- * compiled to produce a command-line decompression filter by defining TEST.
- */