globbing supports character classes now and ^EN string building construct to escape glob patterns

 * globbing is fnmatch(3) compatible, now on every supported platform.
 * which means that escaping of glob patterns is possible now.
   ^ENq has been introduced to ease this task.
 * This finally allows you to pass unmodified filenames to EB.
   Previously it was impossible to open file names containing glob wildcards.
 * this was achieved by moving from GPattern to GRegex as the underlying
   implementation.
 * The glob pattern is converted to a regular expression before being
   compiled to a GRegex.
   This turned out to be trickier than anticipated (~140 lines of code)
   and has a runtime penalty of course (complexity is O(2*n) over the
   pattern length).
   It is IMHO still better than the alternatives, like importing
   external code from libiberty, which is potentially non-cross-platform.
 * Using GRegex also opens the potential of supporting brace "expansions"
   later in the form of glob pattern constructs
   (they won't actually expand but match alternatives).
 * is_glob_pattern() has been simplified and moved to Globber::is_pattern().
   It makes sense to reuse the Globber class namespace instead of using
   plain functions for functions working on glob patterns.
 * The documentation has a new subsection on glob patterns now.
 * Testsuite extended with glob pattern test cases

1 files changed, 15 insertions, 0 deletions

diff --git a/src/parser.cpp b/src/parser.cpp
index a9e9213..1936837 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -463,6 +463,10 @@ StateCtlE:
 		undo.push_obj(qregspec_machine) = new QRegSpecMachine;
 		set(&&StateCtlEQuote);
 		break;
+	case 'N':
+		undo.push_obj(qregspec_machine) = new QRegSpecMachine;
+		set(&&StateCtlEN);
+		break;
 	default:
 		result = (gchar *)g_malloc(3);
 
@@ -513,6 +517,17 @@ StateCtlEQuote:
 	g_free(str);
 	return true;
 
+StateCtlEN:
+	if (!qregspec_machine->input(chr, reg))
+		return false;
+
+	undo.push_obj(qregspec_machine) = NULL;
+	set(StateStart);
+	str = reg->get_string();
+	result = Globber::escape_pattern(str);
+	g_free(str);
+	return true;
+
 StateEscaped:
 	set(StateStart);
 	result = String::chrdup(chr);