MONGOCRYPT-783 address miscellaneous warnings (#975)

* Silence -Wold-style-cast for C++ compatibility code
* Address -Wmissing-prototype and -Wmissing-variable-declarations warnings
* Address -Wundef warnings
* Address -Wvla warnings
* Address -Wunreachable-code-break warnings
* Address -Wassign-enum warnings
* Address -Wunused-macros warnings

kms-message/src/hexlify.c

@@ -14,7 +14,12 @@
  * limitations under the License.
  */
 
+#include "hexlify.h"
+
+//
+
 #include "kms_message_private.h"
+
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>

kms-message/src/kms_request.c

@@ -744,7 +744,7 @@ kms_request_get_signature (kms_request_t *request)
    return kms_request_str_detach (sig);
 }
 
-void
+static void
 kms_request_validate (kms_request_t *request)
 {
    if (!check_and_prohibit_kmip (request)) {

kms-message/src/kms_request_str.c

@@ -27,8 +27,8 @@
 #include <stdlib.h>
 #include <limits.h> /* CHAR_BIT */
 
-bool rfc_3986_tab[256] = {0};
-bool kms_initialized = false;
+static bool rfc_3986_tab[256] = {0};
+static bool kms_initialized = false;
 
 static void
 tables_init (void)
@@ -126,12 +126,6 @@ kms_request_str_detach (kms_request_str_t *str)
    return r;
 }
 
-const char *
-kms_request_str_get (kms_request_str_t *str)
-{
-   return str->str;
-}
-
 bool
 kms_request_str_reserve (kms_request_str_t *str, size_t size)
 {

kms-message/src/kms_response_parser.c

@@ -81,7 +81,6 @@ kms_response_parser_wants_bytes (kms_response_parser_t *parser, int32_t max)
    default:
       KMS_ASSERT (false && "Invalid kms_response_parser HTTP state");
    }
-   return -1;
 }
 
 static bool

kms-message/src/sort.c

@@ -37,14 +37,17 @@
  * https://github.com/freebsd/freebsd/blob/e7c6cef9514d3bb1f14a30a5ee871231523e43db/lib/libc/stdlib/merge.c
  */
 
+#include "sort.h"
+
+//
+
 #include <stddef.h>
 
 /*
  * This is to avoid out-of-bounds addresses in sorting the
  * last 4 elements.
  */
 
-typedef int (*cmp_t) (const void *, const void *);
 #define CMP(x, y) cmp (x, y)
 #define swap(a, b)   \
    {                 \

kms-message/src/sort.h

@@ -15,6 +15,8 @@
  * limitations under the License.
  */
 
+#include <stddef.h>
+
 typedef int (*cmp_t) (const void *, const void *);
 
 void

kms-message/test/test_kmip_reader_writer.c

@@ -6,7 +6,7 @@
  * You may obtain a copy of the License at
  *
  *   http://www.apache.org/licenses/LICENSE-2.0
- *
+
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -54,6 +54,7 @@ kms_kmip_writer_test_evaluate (kmip_writer_t *writer,
    free (expected_hex);
 }
 
+void kms_kmip_writer_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_writer_test (void)
 {
@@ -140,6 +141,7 @@ kms_kmip_writer_test (void)
    kmip_writer_destroy (writer);
 }
 
+void kms_kmip_reader_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_reader_test (void)
 {
@@ -312,6 +314,7 @@ kms_kmip_reader_test (void)
    free (data);
 }
 
+void kms_kmip_reader_negative_int_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_reader_negative_int_test (void)
 {
@@ -356,6 +359,7 @@ kms_kmip_reader_negative_int_test (void)
    free (data);
 }
 
+void kms_kmip_reader_find_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_reader_find_test (void)
 {
@@ -404,6 +408,7 @@ kms_kmip_reader_find_test (void)
    free (data);
 }
 
+void kms_kmip_reader_find_and_recurse_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_reader_find_and_recurse_test (void)
 {
@@ -438,6 +443,7 @@ kms_kmip_reader_find_and_recurse_test (void)
    free (data);
 }
 
+void kms_kmip_reader_find_and_read_enum_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_reader_find_and_read_enum_test (void)
 {
@@ -470,6 +476,7 @@ kms_kmip_reader_find_and_read_enum_test (void)
    free (data);
 }
 
+void kms_kmip_reader_find_and_read_bytes_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_reader_find_and_read_bytes_test (void)
 {

kms-message/test/test_kms_kmip_request.c

@@ -76,6 +76,7 @@ value="ffa8cc79e8c3763b0121fcd06bb3488c8bf42c0774604640279b16b264194030eeb083962
       0x36, 0xa9, 0x06, 0x6b, 0x4e, 0x10, 0xae, 0xb5, 0x6a, 0x5c, 0xcf, 0x6a, \
       0xa4, 0x69, 0x01, 0xe6, 0x25, 0xe3, 0x40, 0x0c, 0x78, 0x11, 0xd2, 0xec
 
+void kms_kmip_request_register_secretdata_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_request_register_secretdata_test (void)
 {
@@ -98,6 +99,7 @@ kms_kmip_request_register_secretdata_test (void)
    kms_request_destroy (req);
 }
 
+void kms_kmip_request_register_secretdata_invalid_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_request_register_secretdata_invalid_test (void)
 {
@@ -144,6 +146,7 @@ value="7FJYvnV6XkaUCWuY96bCSc6AuhvkPpqI"/>
       0x58, 0x6b, 0x61, 0x55, 0x43, 0x57, 0x75, 0x59, 0x39, 0x36, 0x62, 0x43, \
       0x53, 0x63, 0x36, 0x41, 0x75, 0x68, 0x76, 0x6b, 0x50, 0x70, 0x71, 0x49
 
+void kms_kmip_request_get_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_request_get_test (void)
 {
@@ -200,6 +203,7 @@ value="7FJYvnV6XkaUCWuY96bCSc6AuhvkPpqI"/>
       0x58, 0x6b, 0x61, 0x55, 0x43, 0x57, 0x75, 0x59, 0x39, 0x36, 0x62, 0x43, \
       0x53, 0x63, 0x36, 0x41, 0x75, 0x68, 0x76, 0x6b, 0x50, 0x70, 0x71, 0x49
 
+void kms_kmip_request_activate_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_request_activate_test (void)
 {

kms-message/test/test_kms_kmip_response.c

@@ -56,6 +56,7 @@ static const uint8_t SUCCESS_REGISTER_RESPONSE[] = {
 
 static const char *const SUCCESS_REGISTER_RESPONSE_UNIQUE_IDENTIFIER = "39";
 
+void kms_kmip_response_get_unique_identifier_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_response_get_unique_identifier_test (void)
 {
@@ -141,6 +142,7 @@ static const uint8_t SUCCESS_GET_RESPONSE_SECRETDATA[] = {
    0x36, 0xa9, 0x06, 0x6b, 0x4e, 0x10, 0xae, 0xb5, 0x6a, 0x5c, 0xcf, 0x6a,
    0xa4, 0x69, 0x01, 0xe6, 0x25, 0xe3, 0x40, 0x0c, 0x78, 0x11, 0xd2, 0xec};
 
+void kms_kmip_response_get_secretdata_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_response_get_secretdata_test (void)
 {
@@ -197,6 +199,7 @@ static const uint8_t ERROR_GET_RESPOSE_NOTFOUND[] = {
    0x6c, 0x74, 0x52, 0x65, 0x61, 0x73, 0x6f, 0x6e, 0x49, 0x74, 0x65, 0x6d, 0x4e,
    0x6f, 0x74, 0x46, 0x6f, 0x75, 0x6e, 0x64};
 
+void kms_kmip_response_get_secretdata_notfound_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_response_get_secretdata_notfound_test (void)
 {

kms-message/test/test_kms_kmip_response_parser.c

@@ -36,6 +36,7 @@ static const int SAMPLE_KMIP_FIRST_LENGTH = 32;
 /* SAMPLE_KMIP_LARGE_LENGTH is a byte size larger than the message. */
 static const int SAMPLE_KMIP_LARGE_LENGTH = 1024;
 
+void kms_kmip_response_parser_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_response_parser_test (void)
 {
@@ -118,6 +119,7 @@ feed_full_response (kms_response_parser_t *parser, uint8_t *data)
    }
 }
 
+void kms_kmip_response_parser_reuse_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_response_parser_reuse_test (void)
 {
@@ -150,6 +152,7 @@ kms_kmip_response_parser_reuse_test (void)
    free (data);
 }
 
+void kms_kmip_response_parser_excess_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_response_parser_excess_test (void)
 {
@@ -171,6 +174,7 @@ kms_kmip_response_parser_excess_test (void)
    free (data);
 }
 
+void kms_kmip_response_parser_notenough_test (void); // -Wmissing-prototypes: for testing only.
 void
 kms_kmip_response_parser_notenough_test (void)
 {