added String::toupper(): minor optimization

 * This is one of the most called functions (although a cheap one),
   so having our own inline implementation speeds up things.
   Benchmarks have shown that parsing is sped up by at least 4%.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/string-utils.h b/src/string-utils.h
index 4eee958..559e590 100644
--- a/src/string-utils.h
+++ b/src/string-utils.h
@@ -27,6 +27,18 @@ namespace SciTECO {
 namespace String {
 
 /**
+ * Upper-case ASCII character.
+ *
+ * There are implementations in glib and libc,
+ * but defining it here ensures it can be inlined.
+ */
+static inline gchar
+toupper(gchar chr)
+{
+	return chr >= 'a' && chr <= 'z' ? chr & ~0x20 : chr;
+}
+
+/**
  * Allocate a string containing a single character chr.
  */
 static inline gchar *