option.h (6661B)
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 31/** 32 * get_opt_value 33 * @p: a pointer to the option name, delimited by commas 34 * @value: a non-NULL pointer that will received the delimited options 35 * 36 * The @value char pointer will be allocated and filled with 37 * the delimited options. 38 * 39 * Returns the position of the comma delimiter/zero byte after the 40 * option name in @p. 41 * The memory pointer in @value must be released with a call to g_free() 42 * when no longer required. 43 */ 44const char *get_opt_value(const char *p, char **value); 45 46bool parse_option_size(const char *name, const char *value, 47 uint64_t *ret, Error **errp); 48bool has_help_option(const char *param); 49 50enum QemuOptType { 51 QEMU_OPT_STRING = 0, /* no parsing (use string as-is) */ 52 QEMU_OPT_BOOL, /* on/off */ 53 QEMU_OPT_NUMBER, /* simple number */ 54 QEMU_OPT_SIZE, /* size, accepts (K)ilo, (M)ega, (G)iga, (T)era postfix */ 55}; 56 57typedef struct QemuOptDesc { 58 const char *name; 59 enum QemuOptType type; 60 const char *help; 61 const char *def_value_str; 62} QemuOptDesc; 63 64struct QemuOptsList { 65 const char *name; 66 const char *implied_opt_name; 67 bool merge_lists; /* Merge multiple uses of option into a single list? */ 68 QTAILQ_HEAD(, QemuOpts) head; 69 QemuOptDesc desc[]; 70}; 71 72const char *qemu_opt_get(QemuOpts *opts, const char *name); 73char *qemu_opt_get_del(QemuOpts *opts, const char *name); 74/** 75 * qemu_opt_has_help_opt: 76 * @opts: options to search for a help request 77 * 78 * Check whether the options specified by @opts include one of the 79 * standard strings which indicate that the user is asking for a 80 * list of the valid values for a command line option (as defined 81 * by is_help_option()). 82 * 83 * Returns: true if @opts includes 'help' or equivalent. 84 */ 85bool qemu_opt_has_help_opt(QemuOpts *opts); 86QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name); 87bool qemu_opt_get_bool(QemuOpts *opts, const char *name, bool defval); 88uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval); 89uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval); 90bool qemu_opt_get_bool_del(QemuOpts *opts, const char *name, bool defval); 91uint64_t qemu_opt_get_number_del(QemuOpts *opts, const char *name, 92 uint64_t defval); 93uint64_t qemu_opt_get_size_del(QemuOpts *opts, const char *name, 94 uint64_t defval); 95int qemu_opt_unset(QemuOpts *opts, const char *name); 96bool qemu_opt_set(QemuOpts *opts, const char *name, const char *value, 97 Error **errp); 98bool qemu_opt_set_bool(QemuOpts *opts, const char *name, bool val, 99 Error **errp); 100bool qemu_opt_set_number(QemuOpts *opts, const char *name, int64_t val, 101 Error **errp); 102typedef int (*qemu_opt_loopfunc)(void *opaque, 103 const char *name, const char *value, 104 Error **errp); 105int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque, 106 Error **errp); 107 108typedef struct { 109 QemuOpts *opts; 110 QemuOpt *opt; 111 const char *name; 112} QemuOptsIter; 113 114void qemu_opt_iter_init(QemuOptsIter *iter, QemuOpts *opts, const char *name); 115const char *qemu_opt_iter_next(QemuOptsIter *iter); 116 117QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id); 118QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, 119 int fail_if_exists, Error **errp); 120void qemu_opts_reset(QemuOptsList *list); 121void qemu_opts_loc_restore(QemuOpts *opts); 122const char *qemu_opts_id(QemuOpts *opts); 123void qemu_opts_set_id(QemuOpts *opts, char *id); 124void qemu_opts_del(QemuOpts *opts); 125bool qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp); 126bool qemu_opts_do_parse(QemuOpts *opts, const char *params, 127 const char *firstname, Error **errp); 128QemuOpts *qemu_opts_parse_noisily(QemuOptsList *list, const char *params, 129 bool permit_abbrev); 130QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, 131 bool permit_abbrev, Error **errp); 132QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict, 133 Error **errp); 134QDict *qemu_opts_to_qdict_filtered(QemuOpts *opts, QDict *qdict, 135 QemuOptsList *list, bool del); 136QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict); 137bool qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp); 138 139typedef int (*qemu_opts_loopfunc)(void *opaque, QemuOpts *opts, Error **errp); 140int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, 141 void *opaque, Error **errp); 142void qemu_opts_print(QemuOpts *opts, const char *sep); 143void qemu_opts_print_help(QemuOptsList *list, bool print_caption); 144void qemu_opts_free(QemuOptsList *list); 145QemuOptsList *qemu_opts_append(QemuOptsList *dst, QemuOptsList *list); 146 147QDict *keyval_parse_into(QDict *qdict, const char *params, const char *implied_key, 148 bool *p_help, Error **errp); 149QDict *keyval_parse(const char *params, const char *implied_key, 150 bool *help, Error **errp); 151void keyval_merge(QDict *old, const QDict *new, Error **errp); 152 153#endif