Bump liberty and termo

Lua detection functions used to cause fatal errors on failure to read.

We could also reconsider treating detection errors as fatal.

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required (VERSION 3.0)
+cmake_minimum_required (VERSION 3.0...3.27)
 project (hex VERSION 0.1.0 LANGUAGES C)
 
 # Moar warnings
@@ -40,7 +40,7 @@ else ()
 endif ()
 
 set (project_libraries ${Unistring_LIBRARIES}
-	${Ncursesw_LIBRARIES} termo-static)
+	${Ncursesw_LIBRARIES} ${Termo_LIBRARIES})
 
 pkg_search_module (lua lua53 lua5.3 lua-5.3 lua54 lua5.4 lua-5.4 lua>=5.3)
 option (WITH_LUA "Enable support for Lua plugins" ${lua_FOUND})
@@ -52,18 +52,9 @@ if (WITH_LUA)
 	list (APPEND project_libraries ${lua_LIBRARIES})
 	include_directories (${lua_INCLUDE_DIRS})
 	link_directories (${lua_LIBRARY_DIRS})
-
-	include (CheckTypeSize)
-	set (CMAKE_REQUIRED_LIBRARIES ${lua_LIBRARIES})
-	set (CMAKE_REQUIRED_INCLUDES ${lua_INCLUDE_DIRS})
-	set (CMAKE_EXTRA_INCLUDE_FILES "lua.h")
-	CHECK_TYPE_SIZE (lua_Integer LUA_INTEGER)
-	if (NOT HAVE_LUA_INTEGER OR LUA_INTEGER LESS 8)
-		message (FATAL_ERROR "Lua must have at least 64-bit integers")
-	endif ()
 endif ()
 
-pkg_check_modules (x11 x11 xrender xft fontconfig)
+pkg_check_modules (x11 x11 xrender xft fontconfig libpng)
 option (WITH_X11 "Build with X11 support" ${x11_FOUND})
 if (WITH_X11)
 	if (NOT x11_FOUND)
@@ -110,6 +101,22 @@ if (WITH_LUA)
 		DESTINATION ${CMAKE_INSTALL_DATADIR}/${PROJECT_NAME})
 endif ()
 if (WITH_X11)
+	include (IconUtils)
+
+	set (icon_base ${PROJECT_BINARY_DIR}/icons)
+	set (icon_png_list)
+	foreach (icon_size 16 32 48)
+		icon_to_png (${PROJECT_NAME} ${PROJECT_SOURCE_DIR}/${PROJECT_NAME}.svg
+			${icon_size} ${icon_base} icon_png)
+		list (APPEND icon_png_list ${icon_png})
+	endforeach ()
+
+	add_custom_target (icons ALL DEPENDS ${icon_png_list})
+
+	install (FILES ${PROJECT_NAME}.svg
+		DESTINATION ${CMAKE_INSTALL_DATADIR}/icons/hicolor/scalable/apps)
+	install (DIRECTORY ${icon_base}
+		DESTINATION ${CMAKE_INSTALL_DATADIR})
 	install (FILES ${PROJECT_NAME}.desktop
 		DESTINATION ${CMAKE_INSTALL_DATADIR}/applications)
 endif ()

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) 2016 - 2023, Přemysl Eric Janouch <p@janouch.name>
+Copyright (c) 2016 - 2024, Přemysl Eric Janouch <p@janouch.name>
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted.

README.adoc

@@ -11,8 +11,10 @@ image::hex.png[align="center"]
 
 Packages
 --------
-Regular releases are sporadic.  git master should be stable enough.  You can get
-a package with the latest development version from Archlinux's AUR.
+Regular releases are sporadic.  git master should be stable enough.
+You can get a package with the latest development version using Arch Linux's
+https://aur.archlinux.org/packages/hex-git[AUR],
+or as a https://git.janouch.name/p/nixexprs[Nix derivation].
 
 Documentation
 -------------
@@ -21,10 +23,11 @@ The rest of this README will concern itself with externalities.
 
 Building and Running
 --------------------
-Build dependencies: CMake, pkg-config, awk, liberty (included),
- termo (included), asciidoctor or asciidoc (recommended but optional) +
+Build-only dependencies: CMake, pkg-config, awk, liberty (included),
+ termo (included), asciidoctor or asciidoc (recommended but optional),
+ rsvg-convert (X11) +
 Runtime dependencies: ncursesw, libunistring, Lua >= 5.3 (for highlighting) +
-Optional runtime dependencies: x11, xft
+Optional runtime dependencies: x11 + xft + libpng (X11)
 
  $ git clone --recursive https://git.janouch.name/p/hex.git
  $ mkdir hex/build

hex.c

@@ -1,7 +1,7 @@
 /*
  * hex -- hex viewer
  *
- * Copyright (c) 2016 - 2023, Přemysl Eric Janouch <p@janouch.name>
+ * Copyright (c) 2016 - 2024, Přemysl Eric Janouch <p@janouch.name>
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted.
@@ -71,6 +71,12 @@ enum
 #include <lua.h>
 #include <lualib.h>
 #include <lauxlib.h>
+
+// This test is too annoying to do in CMake due to CheckTypeSize() being unable
+// to take link_directories(), and the Lua constant is documented.
+#if LUA_MAXINTEGER < INT64_MAX
+#error Lua must have at least 64-bit integers
+#endif
 #endif // WITH_LUA
 
 #define APP_TITLE  PROGRAM_NAME         ///< Left top corner
@@ -164,7 +170,7 @@ g;
 
 // --- Configuration -----------------------------------------------------------
 
-static struct config_schema g_config_colors[] =
+static const struct config_schema g_config_colors[] =
 {
 #define XX(name_, config, fg_, bg_, attrs_) \
 	{ .name = config, .type = CONFIG_ITEM_STRING },
@@ -1205,6 +1211,8 @@ app_lua_load_plugins (const char *plugin_dir)
 		return;
 	}
 
+	lua_pushcfunction (g.L, app_lua_error_handler);
+
 	struct dirent *iter;
 	while ((errno = 0, iter = readdir (dir)))
 	{
@@ -1213,16 +1221,19 @@ app_lua_load_plugins (const char *plugin_dir)
 			continue;
 
 		char *path = xstrdup_printf ("%s/%s", plugin_dir, iter->d_name);
-		lua_pushcfunction (g.L, app_lua_error_handler);
 		if (luaL_loadfile (g.L, path)
 		 || lua_pcall (g.L, 0, 0, -2))
-			exit_fatal ("Lua: %s", lua_tostring (g.L, -1));
+		{
+			print_error ("%s: %s", path, lua_tostring (g.L, -1));
 			lua_pop (g.L, 1);
+		}
 		free (path);
 	}
 	if (errno)
 		exit_fatal ("readdir: %s", strerror (errno));
 	closedir (dir);
+
+	lua_pop (g.L, 1);
 }
 
 static void

hex.svg

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg version="1.0" width="48" height="48" viewBox="0 0 48 48"
+   xmlns="http://www.w3.org/2000/svg">
+  <g transform="translate(24 24) scale(2 2)">
+    <path d="M 0 0 -10 0 -10 -10 0 -10 Z" stroke-width="0" fill="#c6ffd6" />
+    <path d="M 0 0  10 0  10 -10 0 -10 Z" stroke-width="0" fill="#ffd8d8" />
+    <path d="M 0 0 -10 0 -10  10 0  10 Z" stroke-width="0" fill="#d8d8ff" />
+    <path d="M 0 0  10 0  10  10 0  10 Z" stroke-width="0" fill="#ffffac" />
+  </g>
+</svg>

plugins/elf.lua

@@ -18,7 +18,7 @@
 -- See man 5 elf, /usr/include/elf.h and /usr/include/llvm/Support/ELF.h
 
 local detect = function (c)
-	return c:read (4) == "\x7FELF"
+	return #c >= 4 and c:read (4) == "\x7FELF"
 end
 
 local ph_type_table = {

plugins/gzip.lua

@@ -16,7 +16,7 @@
 --
 
 local detect = function (c)
-	return c:read (2) == "\x1f\x8b"
+	return #c >= 2 and c:read (2) == "\x1f\x8b"
 end
 
 local function latin1_to_utf8 (s)

plugins/pcap.lua

@@ -16,11 +16,17 @@
 --
 
 local detect = function (c)
+	if #c < 4 then
+		return false
+	end
 	local magic = c:u32 ()
 	return magic == 0xa1b2c3d4 or magic == 0xd4c3b2a1
 end
 
 local detect_ng = function (c)
+	if #c < 8 then
+		return false
+	end
 	local magic = c (9):u32 ()
 	return c:u32 () == 0x0a0d0d0a
 		and (magic == 0x1a2b3c4d or magic == 0x4d3c2b1a)

plugins/pdf.lua

@@ -335,7 +335,7 @@ end
 -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 
 local detect = function (c)
-	return c:read (5) == "%PDF-"
+	return #c >= 5 and c:read (5) == "%PDF-"
 end
 
 local decode_xref_subsection = function (lex, start, count, result)

plugins/vdi.lua

@@ -16,6 +16,9 @@
 --
 
 local detect = function (c)
+	if #c < 68 then
+		return false
+	end
 	c.position = 65
 	return c:read (4) == "\x7F\x10\xDA\xBE"
 end

plugins/xcursor.lua

@@ -16,7 +16,7 @@
 --
 
 local detect = function (c)
-	return c:read (4) == "Xcur"
+	return #c >= 4 and c:read (4) == "Xcur"
 end
 
 -- https://www.x.org/releases/current/doc/man/man3/Xcursor.3.xhtml