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, 12 insertions, 19 deletions

diff --git a/src/glob.h b/src/glob.h
index 6222520..1577242 100644
--- a/src/glob.h
+++ b/src/glob.h
@@ -18,6 +18,8 @@
 #ifndef __GLOB_H
 #define __GLOB_H
 
+#include <string.h>
+
 #include <glib.h>
 #include <glib/gstdio.h>
 
@@ -26,29 +28,11 @@
 
 namespace SciTECO {
 
-/*
- * Auxiliary functions
- */
-static inline bool
-is_glob_pattern(const gchar *str)
-{
-	if (!str)
-		return false;
-
-	while (*str) {
-		if (*str == '*' || *str == '?')
-			return true;
-		str++;
-	}
-
-	return false;
-}
-
 class Globber {
 	GFileTest test;
 	gchar *dirname;
 	GDir *dir;
-	GPatternSpec *pattern;
+	GRegex *pattern;
 
 public:
 	Globber(const gchar *pattern,
@@ -56,6 +40,15 @@ public:
 	~Globber();
 
 	gchar *next(void);
+
+	static inline bool
+	is_pattern(const gchar *str)
+	{
+		return str && strpbrk(str, "*?[") != NULL;
+	}
+
+	static gchar *escape_pattern(const gchar *pattern);
+	static GRegex *compile_pattern(const gchar *pattern);
 };
 
 /*