[version] Show runtime version of decompression libraries

src/encoding/brotli.c

@@ -175,6 +175,23 @@ brotli_close(struct stream_encoded *stream)
 	}
 }
 
+const char *
+get_brotli_version(void)
+{
+	static char version[16];
+
+	if (!version[0]) {
+		int v = BrotliDecoderVersion();
+		int major = v >> 24;
+		int minor = (v >> 12) & 0xFFF;
+		int patch = v & 0xFFF;
+
+		snprintf(version, 15, "%d.%d.%d", major, minor, patch);
+	}
+
+	return version;
+}
+
 static const char *const brotli_extensions[] = { ".br", NULL };
 
 const struct decoding_backend brotli_decoding_backend = {

src/encoding/brotli.h

@@ -9,6 +9,8 @@ extern "C" {
 
 #ifdef CONFIG_BROTLI
 extern const struct decoding_backend brotli_decoding_backend;
+const char *get_brotli_version(void);
+
 #else
 #define brotli_decoding_backend dummy_decoding_backend
 #endif

src/encoding/bzip2.c

@@ -212,6 +212,22 @@ bzip2_close(struct stream_encoded *stream)
 	}
 }
 
+const char *
+get_bzip2_version(void)
+{
+	static char version[16];
+
+	if (!version[0]) {
+		strncpy(version, BZ2_bzlibVersion(), 15);
+
+		size_t ok = strspn(version, "0123456789.");
+
+		version[ok] = '\0';
+	}
+
+	return version;
+}
+
 static const char *const bzip2_extensions[] = { ".bz2", ".tbz", NULL };
 
 const struct decoding_backend bzip2_decoding_backend = {

src/encoding/bzip2.h

@@ -9,6 +9,7 @@ extern "C" {
 
 #ifdef CONFIG_BZIP2
 extern const struct decoding_backend bzip2_decoding_backend;
+const char *get_bzip2_version(void);
 #else
 #define bzip2_decoding_backend dummy_decoding_backend
 #endif

src/encoding/gzip.c

@@ -250,6 +250,12 @@ deflate_close(struct stream_encoded *stream)
 	}
 }
 
+const char *
+get_gzip_version(void)
+{
+	return zlibVersion();
+}
+
 static const char *const gzip_extensions[] = { ".gz", ".tgz", NULL };
 
 const struct decoding_backend gzip_decoding_backend = {

src/encoding/gzip.h

@@ -9,6 +9,7 @@ extern "C" {
 
 #ifdef CONFIG_GZIP
 extern const struct decoding_backend gzip_decoding_backend;
+const char *get_gzip_version(void);
 #else
 #define gzip_decoding_backend dummy_decoding_backend
 #endif

src/encoding/lzma.c

@@ -176,6 +176,12 @@ lzma_close(struct stream_encoded *stream)
 	}
 }
 
+const char *
+get_lzma_version(void)
+{
+	return lzma_version_string();
+}
+
 static const char *const lzma_extensions[] = { ".lzma", ".xz", NULL };
 
 const struct decoding_backend lzma_decoding_backend = {

src/encoding/lzma.h

@@ -9,6 +9,7 @@ extern "C" {
 
 #ifdef CONFIG_LZMA
 extern const struct decoding_backend lzma_decoding_backend;
+const char *get_lzma_version(void);
 #else
 #define lzma_decoding_backend dummy_decoding_backend
 #endif

src/encoding/zstd.c

@@ -170,6 +170,12 @@ zstd_close(struct stream_encoded *stream)
 	}
 }
 
+const char *
+get_zstd_version(void)
+{
+	return ZSTD_versionString();
+}
+
 static const char *const zstd_extensions[] = { ".zst", NULL };
 
 const struct decoding_backend zstd_decoding_backend = {

src/encoding/zstd.h

@@ -9,6 +9,7 @@ extern "C" {
 
 #ifdef CONFIG_ZSTD
 extern const struct decoding_backend zstd_decoding_backend;
+const char *get_zstd_version(void);
 #else
 #define zstd_decoding_backend dummy_decoding_backend
 #endif

src/main/version.c

@@ -13,6 +13,22 @@
 
 #include "elinks.h"
 
+#ifdef CONFIG_BROTLI
+#include "encoding/brotli.h"
+#endif
+#ifdef CONFIG_GZIP
+#include "encoding/gzip.h"
+#endif
+#ifdef CONFIG_BZIP2
+#include "encoding/bzip2.h"
+#endif
+#ifdef CONFIG_LZMA
+#include "encoding/lzma.h"
+#endif
+#ifdef CONFIG_ZSTD
+#include "encoding/zstd.h"
+#endif
+
 #include "intl/libintl.h"
 #include "main/module.h"
 #include "main/version.h"
@@ -132,19 +148,19 @@ get_dyn_full_version(struct terminal *term, int more)
 		comma, "IPv6",
 #endif
 #ifdef CONFIG_BROTLI
-		comma, "brotli",
+		comma, "brotli(", get_brotli_version(),")",
 #endif
 #ifdef CONFIG_GZIP
-		comma, "gzip",
+		comma, "gzip(", get_gzip_version(),")",
 #endif
 #ifdef CONFIG_BZIP2
-		comma, "bzip2",
+		comma, "bzip2(", get_bzip2_version(), ")",
 #endif
 #ifdef CONFIG_LZMA
-		comma, "lzma",
+		comma, "lzma(", get_lzma_version(), ")",
 #endif
 #ifdef CONFIG_ZSTD
-		comma, "zstd",
+		comma, "zstd(", get_zstd_version(), ")",
 #endif
 #ifndef CONFIG_MOUSE
 		comma, _("No mouse", term),