Refactor the process of choosing validators.

src/trusted/validator_ragel/unreviewed/dfa_validate_32.c

Index: src/trusted/validator_ragel/unreviewed/dfa_validate_32.c
diff --git a/src/trusted/validator_ragel/unreviewed/dfa_validate_32.c b/src/trusted/validator_ragel/unreviewed/dfa_validate_32.c
index 33105ffb1e447d6b733f0fed77dc68166539e364..85891e61253d8f16d19d0def1f82d714253d1035 100644
--- a/src/trusted/validator_ragel/unreviewed/dfa_validate_32.c
+++ b/src/trusted/validator_ragel/unreviewed/dfa_validate_32.c
@@ -26,7 +26,7 @@ static void ProcessError(const uint8_t *ptr, void *userdata) {
   UNREFERENCED_PARAMETER(userdata);
 }
 
-NaClValidationStatus NACL_SUBARCH_NAME(ApplyDfaValidator, x86, 32) (
+NaClValidationStatus ApplyDfaValidator_x86_32(
     uintptr_t guest_addr,
     uint8_t *data,
     size_t size,
@@ -48,3 +48,41 @@ NaClValidationStatus NACL_SUBARCH_NAME(ApplyDfaValidator, x86, 32) (
   }
   return NaClValidationFailed;
 }
+
+static NaClValidationStatus ValidatorCopyNotImplemented(
+    uintptr_t guest_addr,
+    uint8_t *data_old,
+    uint8_t *data_new,
+    size_t size,
+    const NaClCPUFeatures *cpu_features) {
+  UNREFERENCED_PARAMETER(guest_addr);
+  UNREFERENCED_PARAMETER(data_old);
+  UNREFERENCED_PARAMETER(data_new);
+  UNREFERENCED_PARAMETER(size);
+  UNREFERENCED_PARAMETER(cpu_features);
+  return NaClValidationFailedNotImplemented;
+}
+
+static NaClValidationStatus ValidatorCodeReplacementNotImplemented(
+    uintptr_t guest_addr,
+    uint8_t *data_old,
+    uint8_t *data_new,
+    size_t size,
+    const NaClCPUFeatures *cpu_features) {
+  UNREFERENCED_PARAMETER(guest_addr);
+  UNREFERENCED_PARAMETER(data_old);
+  UNREFERENCED_PARAMETER(data_new);
+  UNREFERENCED_PARAMETER(size);
+  UNREFERENCED_PARAMETER(cpu_features);
+  return NaClValidationFailedNotImplemented;
+}
+
+static struct NaClValidatorInterface validator = {
+  ApplyDfaValidator_x86_32,
+  ValidatorCopyNotImplemented,
+  ValidatorCodeReplacementNotImplemented,
+};
+
+void NaClDfaValidatorInit_x86_32(struct NaClValidatorInterface **val) {
+  *val = &validator;
+}