qapi: Drop superfluous qapi_enum_parse() parameter max

The lookup tables have a sentinel, no need to make callers pass their
size.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1503564371-26090-3-git-send-email-armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[Rebased, commit message corrected]

block.c

@@ -1335,7 +1335,6 @@ static int bdrv_open_common(BlockDriverState *bs, BlockBackend *file,
         BlockdevDetectZeroesOptions value =
             qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
                             detect_zeroes,
-                            BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX,
                             BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
                             &local_err);
         if (local_err) {

block/file-posix.c

@@ -439,7 +439,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
                   ? BLOCKDEV_AIO_OPTIONS_NATIVE
                   : BLOCKDEV_AIO_OPTIONS_THREADS;
     aio = qapi_enum_parse(BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"),
-                          BLOCKDEV_AIO_OPTIONS__MAX, aio_default, &local_err);
+                          aio_default, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         ret = -EINVAL;
@@ -448,7 +448,7 @@ static int raw_open_common(BlockDriverState *bs, QDict *options,
     s->use_linux_aio = (aio == BLOCKDEV_AIO_OPTIONS_NATIVE);
 
     locking = qapi_enum_parse(OnOffAuto_lookup, qemu_opt_get(opts, "locking"),
-                              ON_OFF_AUTO__MAX, ON_OFF_AUTO_AUTO, &local_err);
+                              ON_OFF_AUTO_AUTO, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         ret = -EINVAL;
@@ -1975,8 +1975,7 @@ static int raw_create(const char *filename, QemuOpts *opts, Error **errp)
     nocow = qemu_opt_get_bool(opts, BLOCK_OPT_NOCOW, false);
     buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
     prealloc = qapi_enum_parse(PreallocMode_lookup, buf,
-                               PREALLOC_MODE__MAX, PREALLOC_MODE_OFF,
-                               &local_err);
+                               PREALLOC_MODE_OFF, &local_err);
     g_free(buf);
     if (local_err) {
         error_propagate(errp, local_err);

block/file-win32.c

@@ -304,7 +304,7 @@ static bool get_aio_option(QemuOpts *opts, int flags, Error **errp)
     aio_default = (flags & BDRV_O_NATIVE_AIO) ? BLOCKDEV_AIO_OPTIONS_NATIVE
                                               : BLOCKDEV_AIO_OPTIONS_THREADS;
     aio = qapi_enum_parse(BlockdevAioOptions_lookup, qemu_opt_get(opts, "aio"),
-                          BLOCKDEV_AIO_OPTIONS__MAX, aio_default, errp);
+                          aio_default, errp);
 
     switch (aio) {
     case BLOCKDEV_AIO_OPTIONS_NATIVE:

block/gluster.c

@@ -544,8 +544,7 @@ static int qemu_gluster_parse_json(BlockdevOptionsGluster *gconf,
         if (!strcmp(ptr, "tcp")) {
             ptr = "inet";       /* accept legacy "tcp" */
         }
-        type = qapi_enum_parse(SocketAddressType_lookup, ptr,
-                               SOCKET_ADDRESS_TYPE__MAX, -1, NULL);
+        type = qapi_enum_parse(SocketAddressType_lookup, ptr, -1, NULL);
         if (type != SOCKET_ADDRESS_TYPE_INET
             && type != SOCKET_ADDRESS_TYPE_UNIX) {
             error_setg(&local_err,
@@ -1002,8 +1001,7 @@ static int qemu_gluster_create(const char *filename,
                           BDRV_SECTOR_SIZE);
 
     tmp = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
-    prealloc = qapi_enum_parse(PreallocMode_lookup, tmp,
-                               PREALLOC_MODE__MAX, PREALLOC_MODE_OFF,
+    prealloc = qapi_enum_parse(PreallocMode_lookup, tmp, PREALLOC_MODE_OFF,
                                &local_err);
     g_free(tmp);
     if (local_err) {

block/parallels.c

@@ -697,7 +697,8 @@ static int parallels_open(BlockDriverState *bs, QDict *options, int flags,
     s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS);
     buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE);
     s->prealloc_mode = qapi_enum_parse(prealloc_mode_lookup, buf,
-            PRL_PREALLOC_MODE__MAX, PRL_PREALLOC_MODE_FALLOCATE, &local_err);
+                                       PRL_PREALLOC_MODE_FALLOCATE,
+                                       &local_err);
     g_free(buf);
     if (local_err != NULL) {
         goto fail_options;

block/qcow2.c

@@ -2917,8 +2917,7 @@ static int qcow2_create(const char *filename, QemuOpts *opts, Error **errp)
     }
     buf = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
     prealloc = qapi_enum_parse(PreallocMode_lookup, buf,
-                               PREALLOC_MODE__MAX, PREALLOC_MODE_OFF,
-                               &local_err);
+                               PREALLOC_MODE_OFF, &local_err);
     if (local_err) {
         error_propagate(errp, local_err);
         ret = -EINVAL;
@@ -3608,8 +3607,7 @@ static BlockMeasureInfo *qcow2_measure(QemuOpts *opts, BlockDriverState *in_bs,
 
     optstr = qemu_opt_get_del(opts, BLOCK_OPT_PREALLOC);
     prealloc = qapi_enum_parse(PreallocMode_lookup, optstr,
-                               PREALLOC_MODE__MAX, PREALLOC_MODE_OFF,
-                               &local_err);
+                               PREALLOC_MODE_OFF, &local_err);
     g_free(optstr);
     if (local_err) {
         goto err;

blockdev.c

@@ -440,7 +440,6 @@ static void extract_common_blockdev_options(QemuOpts *opts, int *bdrv_flags,
         *detect_zeroes =
             qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
                             qemu_opt_get(opts, "detect-zeroes"),
-                            BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX,
                             BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
                             &local_error);
         if (local_error) {

hmp.c

@@ -1742,7 +1742,7 @@ void hmp_change(Monitor *mon, const QDict *qdict)
         if (read_only) {
             read_only_mode =
                 qapi_enum_parse(BlockdevChangeReadOnlyMode_lookup,
-                                read_only, BLOCKDEV_CHANGE_READ_ONLY_MODE__MAX,
+                                read_only,
                                 BLOCKDEV_CHANGE_READ_ONLY_MODE_RETAIN, &err);
             if (err) {
                 hmp_handle_error(mon, &err);

include/qapi/util.h

@@ -12,7 +12,7 @@
 #define QAPI_UTIL_H
 
 int qapi_enum_parse(const char * const lookup[], const char *buf,
-                    int max, int def, Error **errp);
+                    int def, Error **errp);
 
 int parse_qapi_name(const char *name, bool complete);
 

migration/global_state.c

@@ -89,8 +89,7 @@ static int global_state_post_load(void *opaque, int version_id)
     s->received = true;
     trace_migrate_global_state_post_load(runstate);
 
-    r = qapi_enum_parse(RunState_lookup, runstate, RUN_STATE__MAX,
-                                -1, &local_err);
+    r = qapi_enum_parse(RunState_lookup, runstate, -1, &local_err);
 
     if (r == -1) {
         if (local_err) {

qapi/qapi-util.c

@@ -16,7 +16,7 @@
 #include "qapi/util.h"
 
 int qapi_enum_parse(const char * const lookup[], const char *buf,
-                    int max, int def, Error **errp)
+                    int def, Error **errp)
 {
     int i;
 
@@ -24,7 +24,7 @@ int qapi_enum_parse(const char * const lookup[], const char *buf,
         return def;
     }
 
-    for (i = 0; i < max; i++) {
+    for (i = 0; lookup[i]; i++) {
         if (!strcmp(buf, lookup[i])) {
             return i;
         }

qemu-img.c

@@ -3491,8 +3491,7 @@ static int img_resize(int argc, char **argv)
             break;
         case OPTION_PREALLOCATION:
             prealloc = qapi_enum_parse(PreallocMode_lookup, optarg,
-                                       PREALLOC_MODE__MAX, PREALLOC_MODE__MAX,
-                                       NULL);
+                                       PREALLOC_MODE__MAX, NULL);
             if (prealloc == PREALLOC_MODE__MAX) {
                 error_report("Invalid preallocation mode '%s'", optarg);
                 return 1;

qemu-nbd.c

@@ -641,7 +641,6 @@ int main(int argc, char **argv)
             detect_zeroes =
                 qapi_enum_parse(BlockdevDetectZeroesOptions_lookup,
                                 optarg,
-                                BLOCKDEV_DETECT_ZEROES_OPTIONS__MAX,
                                 BLOCKDEV_DETECT_ZEROES_OPTIONS_OFF,
                                 &local_err);
             if (local_err) {

tests/qmp-test.c

@@ -182,8 +182,7 @@ static void test_query(const void *data)
     } else {
         g_assert(error);
         g_assert_cmpint(qapi_enum_parse(QapiErrorClass_lookup, error_class,
-                                        QAPI_ERROR_CLASS__MAX, -1,
-                                        &error_abort),
+                                        -1, &error_abort),
                         ==, expected_error_class);
     }
     QDECREF(resp);

tests/test-qapi-util.c

@@ -20,25 +20,20 @@ static void test_qapi_enum_parse(void)
     Error *err = NULL;
     int ret;
 
-    ret = qapi_enum_parse(QType_lookup, NULL, QTYPE__MAX, QTYPE_NONE,
-                          &error_abort);
+    ret = qapi_enum_parse(QType_lookup, NULL, QTYPE_NONE, &error_abort);
     g_assert_cmpint(ret, ==, QTYPE_NONE);
 
-    ret = qapi_enum_parse(QType_lookup, "junk", QTYPE__MAX, -1,
-                          NULL);
+    ret = qapi_enum_parse(QType_lookup, "junk", -1, NULL);
     g_assert_cmpint(ret, ==, -1);
 
-    ret = qapi_enum_parse(QType_lookup, "junk", QTYPE__MAX, -1,
-                          &err);
+    ret = qapi_enum_parse(QType_lookup, "junk", -1, &err);
     error_free_or_abort(&err);
 
-    ret = qapi_enum_parse(QType_lookup, "none", QTYPE__MAX, -1,
-                          &error_abort);
+    ret = qapi_enum_parse(QType_lookup, "none", -1, &error_abort);
     g_assert_cmpint(ret, ==, QTYPE_NONE);
 
     ret = qapi_enum_parse(QType_lookup, QType_lookup[QTYPE__MAX - 1],
-                          QTYPE__MAX, QTYPE__MAX - 1,
-                          &error_abort);
+                          QTYPE__MAX - 1, &error_abort);
     g_assert_cmpint(ret, ==, QTYPE__MAX - 1);
 }