qemu-option.h

   1 /*
   2  * Commandline option parsing functions
   3  *
   4  * Copyright (c) 2003-2008 Fabrice Bellard
   5  * Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com>
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #ifndef QEMU_OPTIONS_H
  27 #define QEMU_OPTIONS_H
  28
  29 #include "sys-queue.h"
  30
  31 enum QEMUOptionParType {
  32     OPT_FLAG,
  33     OPT_NUMBER,
  34     OPT_SIZE,
  35     OPT_STRING,
  36 };
  37
  38 typedef struct QEMUOptionParameter {
  39     const char *name;
  40     enum QEMUOptionParType type;
  41     union {
  42         uint64_t n;
  43         char* s;
  44     } value;
  45     const char *help;
  46 } QEMUOptionParameter;
  47
  48
  49 const char *get_opt_name(char *buf, int buf_size, const char *p, char delim);
  50 const char *get_opt_value(char *buf, int buf_size, const char *p);
  51 int get_next_param_value(char *buf, int buf_size,
  52                          const char *tag, const char **pstr);
  53 int get_param_value(char *buf, int buf_size,
  54                     const char *tag, const char *str);
  55 int check_params(char *buf, int buf_size,
  56                  const char * const *params, const char *str);
  57
  58
  59 /*
  60  * The following functions take a parameter list as input. This is a pointer to
  61  * the first element of a QEMUOptionParameter array which is terminated by an
  62  * entry with entry->name == NULL.
  63  */
  64
  65 QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list,
  66     const char *name);
  67 int set_option_parameter(QEMUOptionParameter *list, const char *name,
  68     const char *value);
  69 int set_option_parameter_int(QEMUOptionParameter *list, const char *name,
  70     uint64_t value);
  71 QEMUOptionParameter *parse_option_parameters(const char *param,
  72     QEMUOptionParameter *list, QEMUOptionParameter *dest);
  73 void free_option_parameters(QEMUOptionParameter *list);
  74 void print_option_parameters(QEMUOptionParameter *list);
  75 void print_option_help(QEMUOptionParameter *list);
  76
  77 /* ------------------------------------------------------------------ */
  78
  79 typedef struct QemuOpt QemuOpt;
  80 typedef struct QemuOpts QemuOpts;
  81 typedef struct QemuOptsList QemuOptsList;
  82
  83 enum QemuOptType {
  84     QEMU_OPT_STRING = 0,  /* no parsing (use string as-is)                        */
  85     QEMU_OPT_BOOL,        /* on/off                                               */
  86     QEMU_OPT_NUMBER,      /* simple number                                        */
  87     QEMU_OPT_SIZE,        /* size, accepts (K)ilo, (M)ega, (G)iga, (T)era postfix */
  88 };
  89
  90 typedef struct QemuOptDesc {
  91     const char *name;
  92     enum QemuOptType type;
  93     const char *help;
  94 } QemuOptDesc;
  95
  96 struct QemuOptsList {
  97     const char *name;
  98     TAILQ_HEAD(, QemuOpts) head;
  99     QemuOptDesc desc[];
 100 };
 101
 102 const char *qemu_opt_get(QemuOpts *opts, const char *name);
 103 int qemu_opt_get_bool(QemuOpts *opts, const char *name, int defval);
 104 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval);
 105 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval);
 106 int qemu_opt_set(QemuOpts *opts, const char *name, const char *value);
 107 typedef int (*qemu_opt_loopfunc)(const char *name, const char *value, void *opaque);
 108 int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
 109                      int abort_on_failure);
 110
 111 QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id);
 112 QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int fail_if_exists);
 113 int qemu_opts_set(QemuOptsList *list, const char *id,
 114                   const char *name, const char *value);
 115 const char *qemu_opts_id(QemuOpts *opts);
 116 void qemu_opts_del(QemuOpts *opts);
 117 QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, const char *firstname);
 118
 119 typedef int (*qemu_opts_loopfunc)(QemuOpts *opts, void *opaque);
 120 int qemu_opts_print(QemuOpts *opts, void *dummy);
 121 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
 122                       int abort_on_failure);
 123
 124 #endif