use a case-insensitive regex in strptime; fixes #2324

src/library.js

@@ -5782,7 +5782,7 @@ LibraryManager.library = {
       pattern = pattern.replace(new RegExp('\\%'+pattern[i+1], 'g'), '');
     }
 
-    var matches = new RegExp('^'+pattern).exec(Pointer_stringify(buf))
+    var matches = new RegExp('^'+pattern, "i").exec(Pointer_stringify(buf))
     // Module['print'](Pointer_stringify(buf)+ ' is matched by '+((new RegExp('^'+pattern)).source)+' into: '+JSON.stringify(matches));
 
     function initDate() {

tests/core/test_strptime_tm.in

@@ -2,6 +2,15 @@
 #include <stdio.h>
 #include <string.h>
 
+void ReadMonth(const char *month)
+{
+    tm value = {0};
+    if(strptime(month, "%b", &value))
+    {
+        printf("%s: %d\n", month, value.tm_mon);
+    }
+}
+
 int main() {
   struct tm tm;
   char *ptr = strptime("17410105012000", "%H%M%S%d%m%Y", &tm);
@@ -24,4 +33,26 @@ int main() {
                                                                 : "ERR")))))),
       tm.tm_mon + 1, tm.tm_mday, tm.tm_year + 1900, tm.tm_hour, tm.tm_min,
       tm.tm_sec);
+
+  printf("\n");
+
+  ReadMonth("jan");
+  ReadMonth("january");
+  ReadMonth("feb");
+  ReadMonth("february");
+  ReadMonth("march");
+  ReadMonth("mar");
+  ReadMonth("april");
+  ReadMonth("may");
+  ReadMonth("may");
+  ReadMonth("june");
+  ReadMonth("jul");
+  ReadMonth("august");
+  ReadMonth("september");
+  ReadMonth("oct");
+  ReadMonth("nov");
+  ReadMonth("november");
+  ReadMonth("december");
+
+  return 0;
 }

tests/core/test_strptime_tm.out

@@ -1 +1,18 @@
-OK: Wed, 1/5/2000 17:41:1
+OK: Wed, 1/5/2000 17:41:1
+jan: 0
+january: 0
+feb: 1
+february: 1
+march: 2
+mar: 2
+april: 3
+may: 4
+may: 4
+june: 5
+jul: 6
+august: 7
+september: 8
+oct: 9
+nov: 10
+november: 10
+december: 11