[PATCH v6 03/36] command-line: refractor parser code

[elena . ufimtseva]

From: Elena Ufimtseva <address@hidden>

Refactor command-line parser code so that it could be used by
other processes as well.

Signed-off-by: Elena Ufimtseva <address@hidden>
Signed-off-by: Jagannathan Raman <address@hidden>
Signed-off-by: John G Johnson <address@hidden>
---
 MAINTAINERS          |  2 +
 Makefile.objs        |  2 +
 include/qemu-parse.h | 42 ++++++++++++++++++++
 qemu-parse.c         | 93 ++++++++++++++++++++++++++++++++++++++++++++
 softmmu/vl.c         | 84 +--------------------------------------
 5 files changed, 140 insertions(+), 83 deletions(-)
 create mode 100644 include/qemu-parse.h
 create mode 100644 qemu-parse.c

diff --git a/MAINTAINERS b/MAINTAINERS
index b5c86ec494..611d9a64b0 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2003,6 +2003,8 @@ F: tests/test-keyval.c
 F: tests/test-qemu-opts.c
 F: util/keyval.c
 F: util/qemu-option.c
+F: include/qemu-parse.h
+F: qemu-parse.c
 
 Coverity model
 M: Markus Armbruster <address@hidden>
diff --git a/Makefile.objs b/Makefile.objs
index bfb9271862..f29c60c59d 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -78,6 +78,8 @@ qemu-seccomp.o-libs := $(SECCOMP_LIBS)
 
 common-obj-$(CONFIG_FDT) += device_tree.o
 
+common-obj-y += qemu-parse.o
+
 common-obj-y += qapi/
 common-obj-y += util/machine-notify.o
 
diff --git a/include/qemu-parse.h b/include/qemu-parse.h
new file mode 100644
index 0000000000..156b238db6
--- /dev/null
+++ b/include/qemu-parse.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright © 2018, 2020 Oracle and/or its affiliates.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef VL_H
+#define VL_H
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+
+/***********************************************************/
+/* QEMU Block devices */
+
+#define HD_OPTS "media=disk"
+#define CDROM_OPTS "media=cdrom"
+#define FD_OPTS ""
+#define PFLASH_OPTS ""
+#define MTD_OPTS ""
+#define SD_OPTS ""
+
+#define HAS_ARG 0x0001
+
+typedef struct QEMUOption {
+    const char *name;
+    int flags;
+    int index;
+    uint32_t arch_mask;
+} QEMUOption;
+
+const QEMUOption *lookup_opt(int argc, char **argv, const char **poptarg,
+                             int *poptind);
+
+int drive_init_func(void *opaque, QemuOpts *opts, Error **errp);
+
+int device_init_func(void *opaque, QemuOpts *opts, Error **errp);
+
+#endif /* VL_H */
+
diff --git a/qemu-parse.c b/qemu-parse.c
new file mode 100644
index 0000000000..2535374fdd
--- /dev/null
+++ b/qemu-parse.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright © 2018, 2020 Oracle and/or its affiliates.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+
+#include "sysemu/blockdev.h"
+#include "sysemu/arch_init.h"
+#include "qemu/option.h"
+#include "qemu-options.h"
+#include "qapi/error.h"
+#include "qemu/error-report.h"
+#include "monitor/qdev.h"
+#include "qom/object.h"
+#include "qemu-parse.h"
+
+/***********************************************************/
+/* QEMU Block devices */
+
+static const QEMUOption qemu_options[] = {
+    { "h", 0, QEMU_OPTION_h, QEMU_ARCH_ALL },
+#define QEMU_OPTIONS_GENERATE_OPTIONS
+#include "qemu-options-wrapper.h"
+    { NULL },
+};
+
+const QEMUOption *lookup_opt(int argc, char **argv, const char **poptarg,
+                             int *poptind)
+{
+    const QEMUOption *popt;
+    int optind = *poptind;
+    char *r = argv[optind];
+    const char *optarg;
+
+    loc_set_cmdline(argv, optind, 1);
+    optind++;
+    /* Treat --foo the same as -foo.  */
+    if (r[1] == '-') {
+        r++;
+    }
+    popt = qemu_options;
+    for (;;) {
+        if (!popt->name) {
+            error_report("invalid option");
+            exit(1);
+        }
+        if (!strcmp(popt->name, r + 1)) {
+            break;
+        }
+        popt++;
+    }
+    if (popt->flags & HAS_ARG) {
+        if (optind >= argc) {
+            error_report("requires an argument");
+            exit(1);
+        }
+        optarg = argv[optind++];
+        loc_set_cmdline(argv, optind - 2, 2);
+    } else {
+        optarg = NULL;
+    }
+
+    *poptarg = optarg;
+    *poptind = optind;
+
+    return popt;
+}
+
+int drive_init_func(void *opaque, QemuOpts *opts, Error **errp)
+{
+    BlockInterfaceType *block_default_type = opaque;
+
+    return drive_new(opts, *block_default_type, errp) == NULL;
+}
+
+int device_init_func(void *opaque, QemuOpts *opts, Error **errp)
+{
+    DeviceState *dev;
+
+    dev = qdev_device_add(opts, errp);
+    if (!dev && *errp) {
+        error_report_err(*errp);
+        return -1;
+    } else if (dev) {
+        object_unref(OBJECT(dev));
+    }
+    return 0;
+}
diff --git a/softmmu/vl.c b/softmmu/vl.c
index 380aefd56e..33568108b0 100644
--- a/softmmu/vl.c
+++ b/softmmu/vl.c
@@ -36,6 +36,7 @@
 #include "sysemu/runstate.h"
 #include "sysemu/seccomp.h"
 #include "sysemu/tcg.h"
+#include "qemu-parse.h"
 
 #include "qemu/error-report.h"
 #include "qemu/sockets.h"
@@ -970,20 +971,6 @@ static int cleanup_add_fd(void *opaque, QemuOpts *opts, 
Error **errp)
 /***********************************************************/
 /* QEMU Block devices */
 
-#define HD_OPTS "media=disk"
-#define CDROM_OPTS "media=cdrom"
-#define FD_OPTS ""
-#define PFLASH_OPTS ""
-#define MTD_OPTS ""
-#define SD_OPTS ""
-
-static int drive_init_func(void *opaque, QemuOpts *opts, Error **errp)
-{
-    BlockInterfaceType *block_default_type = opaque;
-
-    return drive_new(opts, *block_default_type, errp) == NULL;
-}
-
 static int drive_enable_snapshot(void *opaque, QemuOpts *opts, Error **errp)
 {
     if (qemu_opt_get(opts, "snapshot") == NULL) {
@@ -1691,21 +1678,6 @@ static void help(int exitcode)
     exit(exitcode);
 }
 
-#define HAS_ARG 0x0001
-
-typedef struct QEMUOption {
-    const char *name;
-    int flags;
-    int index;
-    uint32_t arch_mask;
-} QEMUOption;
-
-static const QEMUOption qemu_options[] = {
-    { "h", 0, QEMU_OPTION_h, QEMU_ARCH_ALL },
-#define QEMU_OPTIONS_GENERATE_OPTIONS
-#include "qemu-options-wrapper.h"
-    { NULL },
-};
 
 typedef struct VGAInterfaceInfo {
     const char *opt_name;    /* option name */
@@ -2067,20 +2039,6 @@ static int device_help_func(void *opaque, QemuOpts 
*opts, Error **errp)
     return qdev_device_help(opts);
 }
 
-static int device_init_func(void *opaque, QemuOpts *opts, Error **errp)
-{
-    DeviceState *dev;
-
-    dev = qdev_device_add(opts, errp);
-    if (!dev && *errp) {
-        error_report_err(*errp);
-        return -1;
-    } else if (dev) {
-        object_unref(OBJECT(dev));
-    }
-    return 0;
-}
-
 static int chardev_init_func(void *opaque, QemuOpts *opts, Error **errp)
 {
     Error *local_err = NULL;
@@ -2332,46 +2290,6 @@ static void qemu_unlink_pidfile(Notifier *n, void *data)
 
 bool machine_init_done;
 
-static const QEMUOption *lookup_opt(int argc, char **argv,
-                                    const char **poptarg, int *poptind)
-{
-    const QEMUOption *popt;
-    int optind = *poptind;
-    char *r = argv[optind];
-    const char *optarg;
-
-    loc_set_cmdline(argv, optind, 1);
-    optind++;
-    /* Treat --foo the same as -foo.  */
-    if (r[1] == '-')
-        r++;
-    popt = qemu_options;
-    for(;;) {
-        if (!popt->name) {
-            error_report("invalid option");
-            exit(1);
-        }
-        if (!strcmp(popt->name, r + 1))
-            break;
-        popt++;
-    }
-    if (popt->flags & HAS_ARG) {
-        if (optind >= argc) {
-            error_report("requires an argument");
-            exit(1);
-        }
-        optarg = argv[optind++];
-        loc_set_cmdline(argv, optind - 2, 2);
-    } else {
-        optarg = NULL;
-    }
-
-    *poptarg = optarg;
-    *poptind = optind;
-
-    return popt;
-}
-
 static MachineClass *select_machine(void)
 {
     GSList *machines = object_class_get_list(TYPE_MACHINE, false);
-- 
2.25.GIT