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 <stdint.h>
  30 #include "qemu-queue.h"
  31 #include "qdict.h"
  32
  33 enum QEMUOptionParType {
  34     OPT_FLAG,
  35     OPT_NUMBER,
  36     OPT_SIZE,
  37     OPT_STRING,
  38 };
  39
  40 typedef struct QEMUOptionParameter {
  41     const char *name;
  42     enum QEMUOptionParType type;
  43     union {
  44         uint64_t n;
  45         char* s;
  46     } value;
  47     const char *help;
  48 } QEMUOptionParameter;
  49
  50
  51 const char *get_opt_name(char *buf, int buf_size, const char *p, char delim);
  52 const char *get_opt_value(char *buf, int buf_size, const char *p);
  53 int get_next_param_value(char *buf, int buf_size,
  54                          const char *tag, const char **pstr);
  55 int get_param_value(char *buf, int buf_size,
  56                     const char *tag, const char *str);
  57 int check_params(char *buf, int buf_size,
  58                  const char * const *params, const char *str);
  59
  60
  61 /*
  62  * The following functions take a parameter list as input. This is a pointer to
  63  * the first element of a QEMUOptionParameter array which is terminated by an
  64  * entry with entry->name == NULL.
  65  */
  66
  67 QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list,
  68     const char *name);
  69 int set_option_parameter(QEMUOptionParameter *list, const char *name,
  70     const char *value);
  71 int set_option_parameter_int(QEMUOptionParameter *list, const char *name,
  72     uint64_t value);
  73 QEMUOptionParameter *append_option_parameters(QEMUOptionParameter *dest,
  74     QEMUOptionParameter *list);
  75 QEMUOptionParameter *parse_option_parameters(const char *param,
  76     QEMUOptionParameter *list, QEMUOptionParameter *dest);
  77 void free_option_parameters(QEMUOptionParameter *list);
  78 void print_option_parameters(QEMUOptionParameter *list);
  79 void print_option_help(QEMUOptionParameter *list);
  80
  81 /* ------------------------------------------------------------------ */
  82
  83 typedef struct QemuOpt QemuOpt;
  84 typedef struct QemuOpts QemuOpts;
  85 typedef struct QemuOptsList QemuOptsList;
  86
  87 enum QemuOptType {
  88     QEMU_OPT_STRING = 0,  /* no parsing (use string as-is)                        */
  89     QEMU_OPT_BOOL,        /* on/off                                               */
  90     QEMU_OPT_NUMBER,      /* simple number                                        */
  91     QEMU_OPT_SIZE,        /* size, accepts (K)ilo, (M)ega, (G)iga, (T)era postfix */
  92 };
  93
  94 typedef struct QemuOptDesc {
  95     const char *name;
  96     enum QemuOptType type;
  97     const char *help;
  98 } QemuOptDesc;
  99
 100 struct QemuOptsList {
 101     const char *name;
 102     const char *implied_opt_name;
 103     bool merge_lists;  /* Merge multiple uses of option into a single list? */
 104     QTAILQ_HEAD(, QemuOpts) head;
 105     QemuOptDesc desc[];
 106 };
 107
 108 const char *qemu_opt_get(QemuOpts *opts, const char *name);
 109 bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval);
 110 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval);
 111 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval);
 112 int qemu_opt_set(QemuOpts *opts, const char *name, const char *value);
 113 int qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val);
 114 typedef int (*qemu_opt_loopfunc)(const char *name, const char *value, void *opaque);
 115 int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
 116                      int abort_on_failure);
 117
 118 QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id);
 119 QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int fail_if_exists);
 120 void qemu_opts_reset(QemuOptsList *list);
 121 void qemu_opts_loc_restore(QemuOpts *opts);
 122 int qemu_opts_set(QemuOptsList *list, const char *id,
 123                   const char *name, const char *value);
 124 const char *qemu_opts_id(QemuOpts *opts);
 125 void qemu_opts_del(QemuOpts *opts);
 126 int qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc);
 127 int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname);
 128 QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, int permit_abbrev);
 129 void qemu_opts_set_defaults(QemuOptsList *list, const char *params,
 130                             int permit_abbrev);
 131 QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict);
 132 QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict);
 133
 134 typedef int (*qemu_opts_loopfunc)(QemuOpts *opts, void *opaque);
 135 int qemu_opts_print(QemuOpts *opts, void *dummy);
 136 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
 137                       int abort_on_failure);
 138
 139 #endif