From 7ef1662e685abf3650629b13966dc3e25bf8014a Mon Sep 17 00:00:00 2001
From: Paul Marquess <pmqs@outlook.com>
Date: Wed, 4 Feb 2026 22:08:35 +0000
Subject: [PATCH] Update markdown files to reference PPMD compression (#958)

---
 INDEX.md                  | 1 +
 README.md                 | 4 +++-
 doc/mz_compress_method.md | 1 +
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/INDEX.md b/INDEX.md
index 86af188..af626ad 100644
--- a/INDEX.md
+++ b/INDEX.md
@@ -14,6 +14,7 @@
 | mz_strm_libcomp.\* | Apple compression stream                        |
 | mz_strm_lzma.\*    | LZMA stream using liblzma                       |
 | mz_strm_mem.\*     | Memory stream                                   |
+| mz_strm_ppmd.\*    | PPMD stream                                     |
 | mz_strm_split.\*   | Disk splitting stream                           |
 | mz_strm_pkcrypt.\* | PKWARE traditional encryption stream            |
 | mz_strm_os\*       | Platform specific file stream                   |
diff --git a/README.md b/README.md
index 27c9f25..253f471 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@ not been maintained for a long period of time. The code has been largely refacto
 + Read and write raw zip entry data.
 + Reading and writing zip archives from memory.
 + Support for large files with ZIP64 extension.
-+ Zlib, BZIP2, LZMA, XZ, and ZSTD compression methods.
++ Zlib, BZIP2, LZMA, PPMD, XZ and ZSTD compression methods.
 + Password protection through Traditional PKWARE and [WinZIP AES](https://www.winzip.com/aes_info.htm) encryption.
 + Buffered streaming for improved I/O performance.
 + NTFS timestamp support for UTC last modified, last accessed, and creation dates.
@@ -72,6 +72,7 @@ cmake --build build
 | MZ_ZLIB_FLAVOR      | Select ZLIB implementation (auto, zlib-ng, zlib)               |      auto     |
 | MZ_BZIP2            | Enables BZIP2 compression                                      |      ON       |
 | MZ_LZMA             | Enables LZMA & XZ compression                                  |      ON       |
+| MZ_PPMD             | Enables PPMD compression                                       |      ON       |
 | MZ_ZSTD             | Enables ZSTD compression                                       |      ON       |
 | MZ_LIBCOMP          | Enables Apple compression                                      |     APPLE     |
 | MZ_FETCH_LIBS       | Enables fetching third-party libraries if not found            |     WIN32     |
@@ -100,6 +101,7 @@ installed then it will be used, otherwise CMake will retrieve the source code fo
 |-|-|-|-|
 [bzip2](https://www.sourceware.org/bzip2/)|[license](https://github.com/zlib-ng/minizip-ng/blob/develop/lib/bzip2/LICENSE)|`MZ_BZIP2`|Written by Julian Seward.|
 |[liblzma](https://tukaani.org/xz/)|Public domain|`MZ_LZMA`|Written by Igor Pavlov and Lasse Collin.|
+|[ppmd](https://7-zip.org/)|Public domain|`MZ_PPMD`|Written by Igor Pavlov.|
 |[zlib](https://zlib.net/)|zlib|`MZ_ZLIB`|Written by Mark Adler and Jean-loup Gailly. Or alternatively, [zlib-ng](https://github.com/zlib-ng/zlib-ng) by Hans Kristian Rosbach.|
 |[zstd](https://github.com/facebook/zstd)|[BSD](https://github.com/facebook/zstd/blob/dev/LICENSE)|`MZ_ZSTD`|Written by Facebook.|
 
diff --git a/doc/mz_compress_method.md b/doc/mz_compress_method.md
index 9dae2c1..e94ae31 100644
--- a/doc/mz_compress_method.md
+++ b/doc/mz_compress_method.md
@@ -10,5 +10,6 @@ Compression method enumeration.
 |MZ_COMPRESS_METHOD_LZMA|14|LZMA1 compression|
 |MZ_COMPRESS_METHOD_ZSTD|93|ZSTD compression|
 |MZ_COMPRESS_METHOD_XZ|95|XZ compression|
+|MZ_COMPRESS_METHOD_PPMD|98|PPMD compression|
 
 _MZ_COMPRESS_METHOD_AES_ is only for internal use.