Re: [Qemu-devel] [PATCH trival] vl.c: clean up code

[Chen Gang]

Hello Maintainers:

In main switch of main(), it contents several styles for "{...}" code block.

If it is necessary to use unique style within a function, please let me
know, I will/should clean up it. And also better to tell me which style
we need choose -- for me, I don't know which style is the best to Qemu.


Thanks.

On 03/30/2014 10:34 PM, Chen Gang wrote:
> in get_boot_device()
> 
>  - remove 'res' to simplify code
> 
> in main():
> 
>  - remove useless 'continue'.
> 
>  - in main switch():
> 
>    - remove or adjust all useless 'break'.
> 
>    - remove useless '{' and '}'.
> 
>  - use assignment directly to replace useless 'args'
>    (which is defined in the middle of code block).
> 
> 
> Signed-off-by: Chen Gang <address@hidden>
> ---
>  vl.c | 36 +++++++++++++-----------------------
>  1 file changed, 13 insertions(+), 23 deletions(-)
> 
> diff --git a/vl.c b/vl.c
> index 9975e5a..9c733cb 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -1188,18 +1188,16 @@ DeviceState *get_boot_device(uint32_t position)
>  {
>      uint32_t counter = 0;
>      FWBootEntry *i = NULL;
> -    DeviceState *res = NULL;
>  
>      if (!QTAILQ_EMPTY(&fw_boot_order)) {
>          QTAILQ_FOREACH(i, &fw_boot_order, link) {
>              if (counter == position) {
> -                res = i->dev;
> -                break;
> +                return i->dev;
>              }
>              counter++;
>          }
>      }
> -    return res;
> +    return NULL;
>  }
>  
>  /*
> @@ -3034,7 +3032,6 @@ int main(int argc, char **argv, char **envp)
>          if (argv[optind][0] != '-') {
>              /* disk image */
>              optind++;
> -            continue;
>          } else {
>              const QEMUOption *popt;
>  
> @@ -3204,11 +3201,11 @@ int main(int argc, char **argv, char **envp)
>              case QEMU_OPTION_curses:
>  #ifdef CONFIG_CURSES
>                  display_type = DT_CURSES;
> +                break;
>  #else
>                  fprintf(stderr, "Curses support is disabled\n");
>                  exit(1);
>  #endif
> -                break;
>              case QEMU_OPTION_portrait:
>                  graphic_rotate = 90;
>                  break;
> @@ -3286,7 +3283,6 @@ int main(int argc, char **argv, char **envp)
>              case QEMU_OPTION_audio_help:
>                  AUD_help ();
>                  exit (0);
> -                break;
>              case QEMU_OPTION_soundhw:
>                  select_soundhw (optarg);
>                  break;
> @@ -3296,7 +3292,6 @@ int main(int argc, char **argv, char **envp)
>              case QEMU_OPTION_version:
>                  version();
>                  exit(0);
> -                break;
>              case QEMU_OPTION_m: {
>                  int64_t value;
>                  uint64_t sz;
> @@ -3638,11 +3633,10 @@ int main(int argc, char **argv, char **envp)
>                  olist = qemu_find_opts("machine");
>                  qemu_opts_parse(olist, "accel=tcg", 0);
>                  break;
> -            case QEMU_OPTION_no_kvm_pit: {
> +            case QEMU_OPTION_no_kvm_pit:
>                  fprintf(stderr, "Warning: KVM PIT can no longer be disabled "
>                                  "separately.\n");
>                  break;
> -            }
>              case QEMU_OPTION_no_kvm_pit_reinjection: {
>                  static GlobalProperty kvm_pit_lost_tick_policy[] = {
>                      {
> @@ -3681,11 +3675,11 @@ int main(int argc, char **argv, char **envp)
>  #ifdef CONFIG_VNC
>                  display_remote++;
>                  vnc_display = optarg;
> +                break;
>  #else
>                  fprintf(stderr, "VNC support is disabled\n");
>                  exit(1);
>  #endif
> -                break;
>              case QEMU_OPTION_no_acpi:
>                  acpi_enabled = 0;
>                  break;
> @@ -3811,7 +3805,6 @@ int main(int argc, char **argv, char **envp)
>                  xen_mode = XEN_ATTACH;
>                  break;
>              case QEMU_OPTION_trace:
> -            {
>                  opts = qemu_opts_parse(qemu_find_opts("trace"), optarg, 0);
>                  if (!opts) {
>                      exit(1);
> @@ -3819,7 +3812,6 @@ int main(int argc, char **argv, char **envp)
>                  trace_events = qemu_opt_get(opts, "events");
>                  trace_file = qemu_opt_get(opts, "file");
>                  break;
> -            }
>              case QEMU_OPTION_readconfig:
>                  {
>                      int ret = qemu_read_config_file(optarg);
> @@ -3876,12 +3868,12 @@ int main(int argc, char **argv, char **envp)
>                  if (!opts) {
>                      exit(1);
>                  }
> +                break;
>  #else
>                  error_report("File descriptor passing is disabled on this "
>                               "platform");
>                  exit(1);
>  #endif
> -                break;
>              case QEMU_OPTION_object:
>                  opts = qemu_opts_parse(qemu_find_opts("object"), optarg, 1);
>                  if (!opts) {
> @@ -4371,15 +4363,13 @@ int main(int argc, char **argv, char **envp)
>  
>      qdev_machine_init();
>  
> -    QEMUMachineInitArgs args = { .machine = machine,
> -                                 .ram_size = ram_size,
> -                                 .boot_order = boot_order,
> -                                 .kernel_filename = kernel_filename,
> -                                 .kernel_cmdline = kernel_cmdline,
> -                                 .initrd_filename = initrd_filename,
> -                                 .cpu_model = cpu_model };
> -
> -    current_machine->init_args = args;
> +    current_machine->init_args.machine = machine;
> +    current_machine->init_args.ram_size = ram_size;
> +    current_machine->init_args.boot_order = boot_order;
> +    current_machine->init_args.kernel_filename = kernel_filename;
> +    current_machine->init_args.kernel_cmdline = kernel_cmdline;
> +    current_machine->init_args.initrd_filename = initrd_filename;
> +    current_machine->init_args.cpu_model = cpu_model;
>      machine->init(&current_machine->init_args);
>  
>      audio_init();
> 


-- 
Chen Gang

Open, share and attitude like air, water and life which God blessed