Re: [Qemu-devel] [PATCH V5 3/7] monitor: code move for parse_cmdline()

[Luiz Capitulino <lcapitulino@redhat.com>]

On Sat, 29 Jun 2013 11:52:57 +0800
Wenchao Xia <xiawenc@linux.vnet.ibm.com> wrote:

> get_str() is called by parse_cmdline() so it is moved also. Some
> code style error reported by check script, is also fixed.

Please, explain why you're doing this move.

> 
> Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
> ---
>  monitor.c |  191 +++++++++++++++++++++++++++++++------------------------------
>  1 files changed, 98 insertions(+), 93 deletions(-)
> 
> diff --git a/monitor.c b/monitor.c
> index 68e2e80..03a017d 100644
> --- a/monitor.c
> +++ b/monitor.c
> @@ -733,6 +733,104 @@ static int compare_cmd(const char *name, const char *list)
>      return 0;
>  }
>  
> +static int get_str(char *buf, int buf_size, const char **pp)
> +{
> +    const char *p;
> +    char *q;
> +    int c;
> +
> +    q = buf;
> +    p = *pp;
> +    while (qemu_isspace(*p)) {
> +        p++;
> +    }
> +    if (*p == '\0') {
> +    fail:
> +        *q = '\0';
> +        *pp = p;
> +        return -1;
> +    }
> +    if (*p == '\"') {
> +        p++;
> +        while (*p != '\0' && *p != '\"') {
> +            if (*p == '\\') {
> +                p++;
> +                c = *p++;
> +                switch (c) {
> +                case 'n':
> +                    c = '\n';
> +                    break;
> +                case 'r':
> +                    c = '\r';
> +                    break;
> +                case '\\':
> +                case '\'':
> +                case '\"':
> +                    break;
> +                default:
> +                    qemu_printf("unsupported escape code: '\\%c'\n", c);
> +                    goto fail;
> +                }
> +                if ((q - buf) < buf_size - 1) {
> +                    *q++ = c;
> +                }
> +            } else {
> +                if ((q - buf) < buf_size - 1) {
> +                    *q++ = *p;
> +                }
> +                p++;
> +            }
> +        }
> +        if (*p != '\"') {
> +            qemu_printf("unterminated string\n");
> +            goto fail;
> +        }
> +        p++;
> +    } else {
> +        while (*p != '\0' && !qemu_isspace(*p)) {
> +            if ((q - buf) < buf_size - 1) {
> +                *q++ = *p;
> +            }
> +            p++;
> +        }
> +    }
> +    *q = '\0';
> +    *pp = p;
> +    return 0;
> +}
> +
> +#define MAX_ARGS 16
> +
> +/* NOTE: this parser is an approximate form of the real command parser */
> +static void parse_cmdline(const char *cmdline,
> +                          int *pnb_args, char **args)
> +{
> +    const char *p;
> +    int nb_args, ret;
> +    char buf[1024];
> +
> +    p = cmdline;
> +    nb_args = 0;
> +    for (;;) {
> +        while (qemu_isspace(*p)) {
> +            p++;
> +        }
> +        if (*p == '\0') {
> +            break;
> +        }
> +        if (nb_args >= MAX_ARGS) {
> +            break;
> +        }
> +        ret = get_str(buf, sizeof(buf), &p);
> +        args[nb_args] = g_strdup(buf);
> +        nb_args++;
> +        if (ret < 0) {
> +            break;
> +        }
> +    }
> +    *pnb_args = nb_args;
> +}
> +
>  static void help_cmd_dump(Monitor *mon, const mon_cmd_t *cmds,
>                            const char *prefix, const char *name)
>  {
> @@ -3411,71 +3509,6 @@ static int get_double(Monitor *mon, double *pval, const char **pp)
>      return 0;
>  }
>  
> -static int get_str(char *buf, int buf_size, const char **pp)
> -{
> -    const char *p;
> -    char *q;
> -    int c;
> -
> -    q = buf;
> -    p = *pp;
> -    while (qemu_isspace(*p))
> -        p++;
> -    if (*p == '\0') {
> -    fail:
> -        *q = '\0';
> -        *pp = p;
> -        return -1;
> -    }
> -    if (*p == '\"') {
> -        p++;
> -        while (*p != '\0' && *p != '\"') {
> -            if (*p == '\\') {
> -                p++;
> -                c = *p++;
> -                switch(c) {
> -                case 'n':
> -                    c = '\n';
> -                    break;
> -                case 'r':
> -                    c = '\r';
> -                    break;
> -                case '\\':
> -                case '\'':
> -                case '\"':
> -                    break;
> -                default:
> -                    qemu_printf("unsupported escape code: '\\%c'\n", c);
> -                    goto fail;
> -                }
> -                if ((q - buf) < buf_size - 1) {
> -                    *q++ = c;
> -                }
> -            } else {
> -                if ((q - buf) < buf_size - 1) {
> -                    *q++ = *p;
> -                }
> -                p++;
> -            }
> -        }
> -        if (*p != '\"') {
> -            qemu_printf("unterminated string\n");
> -            goto fail;
> -        }
> -        p++;
> -    } else {
> -        while (*p != '\0' && !qemu_isspace(*p)) {
> -            if ((q - buf) < buf_size - 1) {
> -                *q++ = *p;
> -            }
> -            p++;
> -        }
> -    }
> -    *q = '\0';
> -    *pp = p;
> -    return 0;
> -}
> -
>  /*
>   * Store the command-name in cmdname, and return a pointer to
>   * the remaining of the command string.
> @@ -3532,8 +3565,6 @@ static char *key_get_info(const char *type, char **key)
>  static int default_fmt_format = 'x';
>  static int default_fmt_size = 4;
>  
> -#define MAX_ARGS 16
> -
>  static int is_valid_option(const char *c, const char *typestr)
>  {
>      char option[3];
> @@ -4099,32 +4130,6 @@ static void block_completion_it(void *opaque, BlockDriverState *bs)
>      }
>  }
>  
> -/* NOTE: this parser is an approximate form of the real command parser */
> -static void parse_cmdline(const char *cmdline,
> -                         int *pnb_args, char **args)
> -{
> -    const char *p;
> -    int nb_args, ret;
> -    char buf[1024];
> -
> -    p = cmdline;
> -    nb_args = 0;
> -    for(;;) {
> -        while (qemu_isspace(*p))
> -            p++;
> -        if (*p == '\0')
> -            break;
> -        if (nb_args >= MAX_ARGS)
> -            break;
> -        ret = get_str(buf, sizeof(buf), &p);
> -        args[nb_args] = g_strdup(buf);
> -        nb_args++;
> -        if (ret < 0)
> -            break;
> -    }
> -    *pnb_args = nb_args;
> -}
> -
>  static const char *next_arg_type(const char *typestr)
>  {
>      const char *p = strchr(typestr, ':');