1 files changed, 22 insertions, 0 deletions
diff --git a/source/i18n/regeximp.cpp b/source/i18n/regeximp.cpp
index 32df5fe..395b3fc 100644
--- a/source/i18n/regeximp.cpp
+++ b/source/i18n/regeximp.cpp
@@ -12,6 +12,8 @@
 
 #if !UCONFIG_NO_REGULAR_EXPRESSIONS
 #include "regeximp.h"
+
+#include "uassert.h"
 #include "unicode/utf16.h"
 
 U_NAMESPACE_BEGIN
@@ -113,6 +115,26 @@ int64_t CaseFoldingUCharIterator::getIndex() {
     return fIndex;
 }
 
+// Assemble a pcode instruction from the opcode and operand values.
+// Out-of-range values should not occur - if they do it is from an internal
+// error in the regex compiler. 
+
+// TODO: move into regexcmp, where it has access to fStatus.
+//       NOP cleanly if U_FAILURE.
+//       Set U_REGEX_INTERNAL_ERROR on bad operands.
+
+int32_t URX_BUILD(int32_t type, int32_t val) {
+    if (type < 0 || type > 255) {
+        U_ASSERT(FALSE);
+        type = URX_RESERVED_OP;
+    }
+    if (val > 0x00ffffff) {
+        U_ASSERT(FALSE);
+        val = 0;
+    }
+    return (type << 24) | val;
+}
+
 
 U_NAMESPACE_END