zlib 0.71

inftrees.h

@@ -0,0 +1,62 @@
+/* inftrees.h -- header to use inftrees.c
+ * Copyright (C) 1995 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h 
+ */
+
+/* WARNING: this file should *not* be used by applications. It is
+   part of the implementation of the compression library and is
+   subject to change. Applications should only use zlib.h.
+ */
+
+/* Huffman code lookup table entry--this entry is four bytes for machines
+   that have 16-bit pointers (e.g. PC's in the small or medium model).
+   Valid extra bits (exop) are 0..13.  exop == -64 is EOB (end of block),
+   exop == 16 means that v is a literal, exop < 0 means that v is a pointer
+   to the next table, which codes -exop bits, and lastly exop == -128
+   indicates an unused code.  If a code with exop == -128 is looked up,
+   this implies an error in the data. */
+
+typedef struct inflate_huft_s inflate_huft;
+struct inflate_huft_s {
+  union {
+    struct {
+      char Exop;        /* number of extra bits or operation */
+      char Bits;        /* number of bits in this code or subcode */
+    } what;
+    Byte *pad;          /* pad structure to a power of 2 (4 bytes for */
+  } word;               /*  16-bit, 8 bytes for 32-bit machines) */
+  union {
+    uInt Base;          /* literal, length base, or distance base */
+    inflate_huft *Next; /* pointer to next level of table */
+  } more;
+};
+
+#ifdef DEBUG
+  extern uInt inflate_hufts;
+#endif
+
+extern int inflate_trees_bits __P((
+    uInt *,			/* 19 code lengths */
+    uInt *,			/* bits tree desired/actual depth */
+    inflate_huft **,		/* bits tree result */
+    z_stream *));		/* for zalloc, zfree functions */
+
+extern int inflate_trees_dynamic __P((
+    uInt,			/* number of literal/length codes */
+    uInt,			/* number of distance codes */
+    uInt *,			/* that many (total) code lengths */
+    uInt *,			/* literal desired/actual bit depth */
+    uInt *,			/* distance desired/actual bit depth */
+    inflate_huft **,		/* literal/length tree result */
+    inflate_huft **,		/* distance tree result */
+    z_stream *));		/* for zalloc, zfree functions */
+
+extern int inflate_trees_fixed __P((
+    uInt *,			/* literal desired/actual bit depth */
+    uInt *,			/* distance desired/actual bit depth */
+    inflate_huft **,		/* literal/length tree result */
+    inflate_huft **));		/* distance tree result */
+
+extern int inflate_trees_free __P((
+    inflate_huft *,		/* tables to free */
+    z_stream *));		/* for zfree function */