summaryrefslogtreecommitdiff
path: root/lib/zlib_inflate/inftrees.h
diff options
context:
space:
mode:
Diffstat (limited to 'lib/zlib_inflate/inftrees.h')
-rw-r--r--lib/zlib_inflate/inftrees.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/lib/zlib_inflate/inftrees.h b/lib/zlib_inflate/inftrees.h
new file mode 100644
index 000000000000..e37705adc008
--- /dev/null
+++ b/lib/zlib_inflate/inftrees.h
@@ -0,0 +1,64 @@
+/* inftrees.h -- header to use inftrees.c
+ * Copyright (C) 1995-1998 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). */
+
+#ifndef _INFTREES_H
+#define _INFTREES_H
+
+typedef struct inflate_huft_s inflate_huft;
+
+struct inflate_huft_s {
+ union {
+ struct {
+ Byte Exop; /* number of extra bits or operation */
+ Byte Bits; /* number of bits in this code or subcode */
+ } what;
+ uInt pad; /* pad structure to a power of 2 (4 bytes for */
+ } word; /* 16-bit, 8 bytes for 32-bit int's) */
+ uInt base; /* literal, length base, distance base,
+ or table offset */
+};
+
+/* Maximum size of dynamic tree. The maximum found in a long but non-
+ exhaustive search was 1004 huft structures (850 for length/literals
+ and 154 for distances, the latter actually the result of an
+ exhaustive search). The actual maximum is not known, but the
+ value below is more than safe. */
+#define MANY 1440
+
+extern int zlib_inflate_trees_bits (
+ uInt *, /* 19 code lengths */
+ uInt *, /* bits tree desired/actual depth */
+ inflate_huft **, /* bits tree result */
+ inflate_huft *, /* space for trees */
+ z_streamp); /* for messages */
+
+extern int zlib_inflate_trees_dynamic (
+ 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 */
+ inflate_huft *, /* space for trees */
+ z_streamp); /* for messages */
+
+extern int zlib_inflate_trees_fixed (
+ uInt *, /* literal desired/actual bit depth */
+ uInt *, /* distance desired/actual bit depth */
+ inflate_huft **, /* literal/length tree result */
+ inflate_huft **, /* distance tree result */
+ inflate_huft *, /* space for trees */
+ z_streamp); /* for memory allocation */
+
+#endif /* _INFTREES_H */