Implement ccdf and improve help for ccd? ##diff

libr/core/cmd_cmp.inc.c

@@ -31,6 +31,7 @@ static RCoreHelpMessage help_msg_c = {
 	"cc", " [at]", "compares in two hexdump columns of block size",
 	"ccc", " [at]", "same as above, but only showing different lines",
 	"ccd", " [at]", "compares in two disasm columns of block size",
+	"ccdf", " [at]", "compares function disasm with the other function",
 	"ccdd", " [at]", "compares decompiler output (e cmd.pdc=pdg|pdd)",
 	"cd", " [dir]", "chdir",
 	// "cc", " [offset]", "code bindiff current block against offset"
@@ -1399,19 +1400,36 @@ static int cmd_cmp(void *data, const char *input) {
 		if (input[1] == '?') { // "cc?"
 			r_core_cmd_help_contains (core, help_msg_c, "cc");
 		} else if (input[1] == 'd') { // "ccd"
-			if (input[2] == 'd') { // "ccdd"
+			if (input[2] == '?') {
+				r_core_cmd_help_contains (core, help_msg_c, "ccd");
+			} else if (input[2] == 'd') { // "ccdd"
 				cmd_cmp_disasm (core, input + 3, 'd');
 			} else {
 				cmd_cmp_disasm (core, input + 2, 'c');
 			}
-		} else {
+		} else if (input[1] == 'f') { // "ccdf"
+			RAnalFunction *fcn = r_anal_get_function_at (core->anal, core->offset);
+			if (fcn) {
+				const int obs = core->blocksize;
+				const int fsz = r_anal_function_linear_size (fcn);
+				r_core_block_size (core, fsz);
+				if (input[2] == ' ') {
+					r_core_cmdf (core, "ccd%s", input + 2);
+				} else {
+					R_LOG_ERROR ("Missing argument");
+				}
+				r_core_block_size (core, obs);
+			} else {
+				R_LOG_ERROR ("Cannot find function");
+			}
+		} else if (!input[1] || input[1] == ' ') {
 			ut32 oflags = core->print->flags;
 			ut64 addr = 0; // TOTHINK: Not sure what default address should be
 			if (input[1] == 'c') { // "ccc"
 				core->print->flags |= R_PRINT_FLAGS_DIFFOUT;
 				addr = r_num_math (core->num, input + 2);
 			} else {
-				if (*input && input[1]) {
+				if (input[0] && input[1]) {
 					addr = r_num_math (core->num, input + 2);
 				}
 			}
@@ -1425,6 +1443,8 @@ static int cmd_cmp(void *data, const char *input) {
 				free (b);
 			}
 			core->print->flags = oflags;
+		} else {
+			r_core_return_invalid_command (core, "cc", input[1]);
 		}
 		break;
 	case 'i': // "ci"