aboutsummaryrefslogtreecommitdiff
path: root/zlib/contrib/infback9/inflate9.h
diff options
context:
space:
mode:
Diffstat (limited to 'zlib/contrib/infback9/inflate9.h')
-rw-r--r--zlib/contrib/infback9/inflate9.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/zlib/contrib/infback9/inflate9.h b/zlib/contrib/infback9/inflate9.h
new file mode 100644
index 000000000..ee9a79394
--- /dev/null
+++ b/zlib/contrib/infback9/inflate9.h
@@ -0,0 +1,47 @@
+/* inflate9.h -- internal inflate state definition
+ * Copyright (C) 1995-2003 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.
+ */
+
+/* Possible inflate modes between inflate() calls */
+typedef enum {
+ TYPE, /* i: waiting for type bits, including last-flag bit */
+ STORED, /* i: waiting for stored size (length and complement) */
+ TABLE, /* i: waiting for dynamic block table lengths */
+ LEN, /* i: waiting for length/lit code */
+ DONE, /* finished check, done -- remain here until reset */
+ BAD /* got a data error -- remain here until reset */
+} inflate_mode;
+
+/*
+ State transitions between above modes -
+
+ (most modes can go to the BAD mode -- not shown for clarity)
+
+ Read deflate blocks:
+ TYPE -> STORED or TABLE or LEN or DONE
+ STORED -> TYPE
+ TABLE -> LENLENS -> CODELENS -> LEN
+ Read deflate codes:
+ LEN -> LEN or TYPE
+ */
+
+/* state maintained between inflate() calls. Approximately 7K bytes. */
+struct inflate_state {
+ /* sliding window */
+ unsigned char FAR *window; /* allocated sliding window, if needed */
+ /* dynamic table building */
+ unsigned ncode; /* number of code length code lengths */
+ unsigned nlen; /* number of length code lengths */
+ unsigned ndist; /* number of distance code lengths */
+ unsigned have; /* number of code lengths in lens[] */
+ code FAR *next; /* next available space in codes[] */
+ unsigned short lens[320]; /* temporary storage for code lengths */
+ unsigned short work[288]; /* work area for code table building */
+ code codes[ENOUGH]; /* space for code tables */
+};