diff options
Diffstat (limited to 'examples/zran.h')
| -rw-r--r-- | examples/zran.h | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/examples/zran.h b/examples/zran.h index ebf780d0c1f1..16a84feb9fc0 100644 --- a/examples/zran.h +++ b/examples/zran.h @@ -1,7 +1,7 @@ -/* zran.h -- example of deflated stream indexing and random access - * Copyright (C) 2005, 2012, 2018, 2023 Mark Adler +/* zran.h -- example of deflate stream indexing and random access + * Copyright (C) 2005, 2012, 2018, 2023, 2024, 2025 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h - * Version 1.3 18 Feb 2023 Mark Adler */ + * Version 1.7 16 May 2025 Mark Adler */ #include <stdio.h> #include "zlib.h" @@ -11,7 +11,8 @@ typedef struct point { off_t out; // offset in uncompressed data off_t in; // offset in compressed file of first full byte int bits; // 0, or number of bits (1-7) from byte at in-1 - unsigned char window[32768]; // preceding 32K of uncompressed data + unsigned dict; // number of bytes in window to use as a dictionary + unsigned char *window; // preceding 32K (or less) of uncompressed data } point_t; // Access point list. @@ -20,6 +21,7 @@ struct deflate_index { int mode; // -15 for raw, 15 for zlib, or 31 for gzip off_t length; // total length of uncompressed data point_t *list; // allocated list of access points + z_stream strm; // re-usable inflate engine for extraction }; // Make one pass through a zlib, gzip, or raw deflate compressed stream and @@ -30,7 +32,7 @@ struct deflate_index { // the number of access points on success (>= 1), Z_MEM_ERROR for out of // memory, Z_BUF_ERROR for a premature end of input, Z_DATA_ERROR for a format // or verification error in the input file, or Z_ERRNO for a file read error. -// On success, *built points to the resulting index. +// On success, *built points to the resulting index, otherwise it's NULL. int deflate_index_build(FILE *in, off_t span, struct deflate_index **built); // Use the index to read len bytes from offset into buf. Return the number of |