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