include/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_OPTION_H
  27 #define QEMU_OPTION_H
  28
  29 #include "qemu/queue.h"
  30 #include "qapi/qmp/qdict.h"
  31
  32 const char *get_opt_name(char *buf, int buf_size, const char *p, char delim);
  33 const char *get_opt_value(char *buf, int buf_size, const char *p);
  34 int get_next_param_value(char *buf, int buf_size,
  35                          const char *tag, const char **pstr);
  36 int get_param_value(char *buf, int buf_size,
  37                     const char *tag, const char *str);
  38
  39
  40 void parse_option_size(const char *name, const char *value,
  41                        uint64_t *ret, Error **errp);
  42 bool has_help_option(const char *param);
  43 bool is_valid_option_list(const char *param);
  44
  45 enum QemuOptType {
  46     QEMU_OPT_STRING = 0,  /* no parsing (use string as-is)                        */
  47     QEMU_OPT_BOOL,        /* on/off                                               */
  48     QEMU_OPT_NUMBER,      /* simple number                                        */
  49     QEMU_OPT_SIZE,        /* size, accepts (K)ilo, (M)ega, (G)iga, (T)era postfix */
  50 };
  51
  52 typedef struct QemuOptDesc {
  53     const char *name;
  54     enum QemuOptType type;
  55     const char *help;
  56     const char *def_value_str;
  57 } QemuOptDesc;
  58
  59 struct QemuOptsList {
  60     const char *name;
  61     const char *implied_opt_name;
  62     bool merge_lists;  /* Merge multiple uses of option into a single list? */
  63     QTAILQ_HEAD(, QemuOpts) head;
  64     QemuOptDesc desc[];
  65 };
  66
  67 const char *qemu_opt_get(QemuOpts *opts, const char *name);
  68 char *qemu_opt_get_del(QemuOpts *opts, const char *name);
  69 /**
  70  * qemu_opt_has_help_opt:
  71  * @opts: options to search for a help request
  72  *
  73  * Check whether the options specified by @opts include one of the
  74  * standard strings which indicate that the user is asking for a
  75  * list of the valid values for a command line option (as defined
  76  * by is_help_option()).
  77  *
  78  * Returns: true if @opts includes 'help' or equivalent.
  79  */
  80 bool qemu_opt_has_help_opt(QemuOpts *opts);
  81 QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name);
  82 bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval);
  83 uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval);
  84 uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval);
  85 bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval);
  86 uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name,
  87                                  uint64_t defval);
  88 uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name,
  89                                uint64_t defval);
  90 int qemu_opt_unset(QemuOpts *opts, const char *name);
  91 void qemu_opt_set(QemuOpts *opts, const char *name, const char *value,
  92                   Error **errp);
  93 void qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val,
  94                        Error **errp);
  95 void qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val,
  96                          Error **errp);
  97 typedef int (*qemu_opt_loopfunc)(void *opaque,
  98                                  const char *name, const char *value,
  99                                  Error **errp);
 100 int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque,
 101                      Error **errp);
 102
 103 typedef struct {
 104     QemuOpts *opts;
 105     QemuOpt *opt;
 106     const char *name;
 107 } QemuOptsIter;
 108
 109 void qemu_opt_iter_init(QemuOptsIter *iter, QemuOpts *opts, const char *name);
 110 const char *qemu_opt_iter_next(QemuOptsIter *iter);
 111
 112 QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id);
 113 QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
 114                            int fail_if_exists, Error **errp);
 115 void qemu_opts_reset(QemuOptsList *list);
 116 void qemu_opts_loc_restore(QemuOpts *opts);
 117 void qemu_opts_set(QemuOptsList *list, const char *id,
 118                    const char *name, const char *value, Error **errp);
 119 const char *qemu_opts_id(QemuOpts *opts);
 120 void qemu_opts_set_id(QemuOpts *opts, char *id);
 121 void qemu_opts_del(QemuOpts *opts);
 122 void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp);
 123 void qemu_opts_do_parse(QemuOpts *opts, const char *params,
 124                         const char *firstname, Error **errp);
 125 QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params,
 126                                   bool permit_abbrev);
 127 QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
 128                           bool permit_abbrev, Error **errp);
 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                                Error **errp);
 133 QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict);
 134 void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp);
 135
 136 typedef int (*qemu_opts_loopfunc)(void *opaque, QemuOpts *opts, Error **errp);
 137 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func,
 138                       void *opaque, Error **errp);
 139 void qemu_opts_print(QemuOpts *opts, const char *sep);
 140 void qemu_opts_print_help(QemuOptsList *list);
 141 void qemu_opts_free(QemuOptsList *list);
 142 QemuOptsList *qemu_opts_append(QemuOptsList *dst, QemuOptsList *list);
 143
 144 QDict *keyval_parse(const char *params, const char *implied_key,
 145                     Error **errp);
 146
 147 #endif