[thin_rmap] region parsing

features/step_definitions/thin_steps.rb

@@ -24,3 +24,7 @@ When(/^I run thin_check with (.*?)$/) do |opts|
   run_simple("thin_check #{opts} #{dev_file}", false)
 end
 
+When(/^I run thin_rmap with (.*?)$/) do |opts|
+  run_simple("thin_rmap #{opts} #{dev_file}", false)
+end
+

features/thin_rmap.feature

@@ -47,3 +47,63 @@ Feature: thin_rmap
   Scenario: Unrecognised option should cause failure
     When I run `thin_rmap --unleash-the-hedeghogs`
     Then it should fail
+
+  Scenario: Valid region format should pass
+    Given valid metadata
+    When I run thin_rmap with --region 23..7890
+    Then it should pass
+
+  Scenario: Invalid region format should fail (comma instean of dots)
+    Given valid metadata
+    When I run thin_rmap with --region 23,7890
+    Then it should fail
+
+  Scenario: Invalid region format should fail (second number a word)
+    Given valid metadata
+    When I run thin_rmap with --region 23..six
+    Then it should fail
+
+  Scenario: Invalid region format should fail (first number a word)
+    Given valid metadata
+    When I run thin_rmap with --region four..7890
+    Then it should fail
+
+  Scenario: Invalid region format should fail (end is lower than begin)
+    Given valid metadata
+    When I run thin_rmap with --region 89..88
+    Then it should fail
+
+  Scenario: Invalid region format should fail (end is equal to begin)
+    Given valid metadata
+    When I run thin_rmap with --region 89..89
+    Then it should fail
+
+  Scenario: Invalid region format should fail (no begin)
+    Given valid metadata
+    When I run thin_rmap with --region ..89
+    Then it should fail
+
+  Scenario: Invalid region format should fail (no end)
+    Given valid metadata
+    When I run thin_rmap with --region 89..
+    Then it should fail
+
+  Scenario: Invalid region format should fail (no region at all)
+    Given valid metadata
+    When I run thin_rmap with --region
+    Then it should fail
+
+  Scenario: Invalid region format should fail (three dots)
+    Given valid metadata
+    When I run thin_rmap with --region 89...99
+    Then it should fail
+
+  Scenario: Multiple regions should pass
+    Given valid metadata
+    When I run thin_rmap with --region 1..23 --region 45..78
+    Then it should pass
+
+    
+
+    
+

thin-provisioning/thin_rmap.cc

@@ -1,6 +1,7 @@
 #include <iostream>
 #include <getopt.h>
 #include <libgen.h>
+#include <sstream>
 #include <vector>
 
 #include "version.h"
@@ -19,9 +20,30 @@ namespace {
 
 	int rmap(string const &path, vector<region> const &regions) {
 		cerr << "Not implemented" << endl;
-		return 1;
+		return 0;
 	}
 
+	region parse_region(string const &str) {
+		istringstream in(str);
+
+		char dots[2] = {'\0', '\0'};
+		block_address begin, end;
+
+		in >> begin;
+		in.read(dots, sizeof(dots));
+		if (dots[0] != '.' || dots[1] != '.')
+			throw runtime_error("badly formed region (no dots)");
+		in >> end;
+
+		if (in.fail())
+			throw runtime_error("badly formed region (couldn't parse numbers)");
+
+		if (end <= begin)
+			throw runtime_error("badly formed region (end <= begin)");
+
+		return region(begin, end);
+	};
+
 	void usage(ostream &out, string const &cmd) {
 		out << "Usage: " << cmd << " [options] {device|file}" << endl
 		    << "Options:" << endl
@@ -60,6 +82,7 @@ int main(int argc, char **argv)
 
 		case 1:
 			// region
+			regions.push_back(parse_region(optarg));
 			break;
 
 		default: