Add temporary range operator @.. (#4986)

libr/core/cmd.c

@@ -1741,6 +1741,44 @@ next_arroba:
 			}
 			//ret = -1; /* do not run out-of-foreach cmd */
 		} else {
+			bool tmpseek = false;
+			const char *fromvars[] = { "anal.from", "diff.from", "graph.from",
+				"io.buffer.from", "lines.from", "search.from", "zoom.from", NULL };
+			const char *tovars[] = { "anal.to", "diff.to", "graph.to",
+				"io.buffer.to", "lines.to", "search.to", "zoom.to", NULL };
+			ut64 curfrom[R_ARRAY_SIZE (fromvars) - 1], curto[R_ARRAY_SIZE (tovars) - 1];
+
+			// @..
+			if (ptr[1] == '.' && ptr[2] == '.') {
+				char *range = ptr + 3;
+				char *p = strchr (range, ' ');
+				if (p == NULL) {
+					eprintf ("Usage: / ABCD @..0x1000 0x3000\n");
+					return false;
+				}
+				*p = '\x00';
+				ut64 from = r_num_math (core->num, range);
+				ut64 to = r_num_math (core->num, p + 1);
+
+				// save current ranges
+				for (i = 0; fromvars[i]; i++) {
+					curfrom[i] = r_config_get_i (core->config, fromvars[i]);
+				}
+				for (i = 0; tovars[i]; i++) {
+					curto[i] = r_config_get_i (core->config, tovars[i]);
+				}
+
+				// set new ranges
+				for (i = 0; fromvars[i]; i++) {
+					r_config_set_i (core->config, fromvars[i], from);
+				}
+				for (i = 0; tovars[i]; i++) {
+					r_config_set_i (core->config, tovars[i], to);
+				}
+
+				tmpseek = true;
+			}
+
 			if (usemyblock) {
 				if (addr != UT64_MAX) {
 					core->offset = addr;
@@ -1751,9 +1789,21 @@ if (addr != UT64_MAX) {
 				if (!ptr[1] || r_core_seek (core, addr, 1)) {
 					r_core_block_read (core, 0);
 					ret = r_cmd_call (core->rcmd, r_str_trim_head (cmd));
-				} else ret = 0;
+				} else {
+					ret = 0;
+				}
 }
 			}
+
+			if (tmpseek) {
+				// restore ranges
+				for (i = 0; fromvars[i]; i++) {
+					r_config_set_i (core->config, fromvars[i], curfrom[i]);
+				}
+				for (i = 0; tovars[i]; i++) {
+					r_config_set_i (core->config, tovars[i], curto[i]);
+				}
+			}
 		}
 		if (ptr2) {
 			*ptr2 = '!';

libr/core/cmd_help.c

@@ -356,7 +356,8 @@ static int cmd_help(void *data, const char *input) {
 			"@f:", "file", "temporary replace block with file contents",
 			"@s:", "string", "same as above but from a string",
 			"@x:", "909192", "from hex pairs string",
-			"@@=", "1 2 3", " run the previous command at offsets 1, 2 and 3",
+			"@..", "from to", "temporary set from and to for commands supporting ranges",
+			"@@=", "1 2 3", "run the previous command at offsets 1, 2 and 3",
 			"@@", " hit*", "run the command on every flag matching 'hit*'",
 			"@@@", " [type]", "run a command on every [type] (see @@@? for help)",
 			">", "file", "pipe output of command to file",

libr/include/r_types.h

@@ -209,6 +209,7 @@ typedef void (*PrintfCallback)(const char *str, ...);
 #define IS_NUMBER(x) (x>='0'&&x<='9')
 #define IS_WHITESPACE(x) (x==' '||x=='\t')
 #define R_MEM_ALIGN(x) ((void *)(size_t)(((ut64)(size_t)x) & 0xfffffffffffff000LL))
+#define R_ARRAY_SIZE(x) (sizeof (x) / sizeof (x)[0])
 
 #define R_PTR_ALIGN(v,t) \
 	((char *)(((size_t)(v) ) \