Add r2dec.vars option to hide local variable definitions (#381)

Co-authored-by: pancake <[email protected]>

Author: trufae

README.md

@@ -82,6 +82,7 @@ r2dec.debug         | do not catch exceptions in r2dec.
 r2dec.paddr         | if true, all xrefs uses physical addresses compare.
 r2dec.slow          | if true load all the data before to avoid multirequests to r2.
 r2dec.theme         | defines the color theme to be used on r2dec.
+r2dec.vars          | if true, shows local variable definitions.
 r2dec.xrefs         | if true, shows all xrefs in the pseudo code.
 e scr.html          | outputs html data instead of text.
 e scr.color         | enables syntax colors.

c/r2dec-plugin.c

@@ -262,6 +262,7 @@ static bool r_cmd_pdd_init(RCorePluginSession *cps) {
 	SETPREF("r2dec.highlight", "default", "highlights the current address.");
 	SETPREF("r2dec.paddr", "false", "if true, all xrefs uses physical addresses compare.");
 	SETPREF("r2dec.slow", "false", "load all the data before to avoid multirequests to r2.");
+	SETPREF("r2dec.vars", "true", "if true, shows local variable definitions.");
 	SETPREF("r2dec.xrefs", "false", "if true, shows all xrefs in the pseudo code.");
 	r_config_lock (cfg, true);
 
@@ -289,6 +290,7 @@ static int r_cmd_pdd_init(void *user, const char *cmd) {
 	SETPREF("r2dec.highlight", "default", "highlights the current address.");
 	SETPREF("r2dec.paddr", "false", "if true, all xrefs uses physical addresses compare.");
 	SETPREF("r2dec.slow", "false", "load all the data before to avoid multirequests to r2.");
+	SETPREF("r2dec.vars", "true", "if true, shows local variable definitions.");
 	SETPREF("r2dec.xrefs", "false", "if true, shows all xrefs in the pseudo code.");
 	r_config_lock (cfg, true);
 

js/libdec/core/scope.js

@@ -8,6 +8,9 @@ function _print_locals(locals, address, spaced) {
 	if (Global().evars.honor.blocks) {
 		return;
 	}
+	if (!Global().evars.honor.vars) {
+		return;
+	}
 	var a = Global().printer.auto;
 	for (var i = 0; i < locals.length; i++) {
 		var local = Extra.is.string(locals[i]) ? a(locals[i]) : locals[i].toString(true);

js/libdec/r2util.js

@@ -193,6 +193,7 @@ export default (function() {
                 casts: r2pipe.bool('e r2dec.casts') || has_option(args, '--casts'),
                 assembly: r2pipe.bool('e r2dec.asm') || has_option(args, '--assembly'),
                 blocks: r2pipe.bool('e r2dec.blocks') || has_option(args, '--blocks'),
+                vars: r2pipe.bool('e r2dec.vars'),
                 xrefs: r2pipe.bool('e r2dec.xrefs') || has_option(args, '--xrefs'),
                 paddr: r2pipe.bool('e r2dec.paddr') || has_option(args, '--paddr'),
                 offsets: has_option(args, '--offsets'),