diff options
| -rw-r--r-- | qemu-option.c | 314 | ||||
| -rw-r--r-- | qemu-option.h | 45 |
2 files changed, 359 insertions, 0 deletions
diff --git a/qemu-option.c b/qemu-option.c index 819b8e56af..73c2175492 100644 --- a/qemu-option.c +++ b/qemu-option.c @@ -182,6 +182,24 @@ static int parse_option_bool(const char *name, const char *value, int *ret) return 0; } +static int parse_option_number(const char *name, const char *value, uint64_t *ret) +{ + char *postfix; + uint64_t number; + + if (value != NULL) { + number = strtoull(value, &postfix, 0); + if (*postfix != '\0') { + fprintf(stderr, "Option '%s' needs a number as parameter\n", name); + return -1; + } + } else { + fprintf(stderr, "Option '%s' needs a parameter\n", name); + return -1; + } + return 0; +} + static int parse_option_size(const char *name, const char *value, uint64_t *ret) { char *postfix; @@ -444,3 +462,299 @@ void print_option_help(QEMUOptionParameter *list) list++; } } + +/* ------------------------------------------------------------------ */ + +struct QemuOpt { + const char *name; + const char *str; + + QemuOptDesc *desc; + union { + int bool; + uint64_t uint; + } value; + + QemuOpts *opts; + TAILQ_ENTRY(QemuOpt) next; +}; + +struct QemuOpts { + const char *id; + QemuOptsList *list; + TAILQ_HEAD(, QemuOpt) head; + TAILQ_ENTRY(QemuOpts) next; +}; + +static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name) +{ + QemuOpt *opt; + + TAILQ_FOREACH(opt, &opts->head, next) { + if (strcmp(opt->name, name) != 0) + continue; + return opt; + } + return NULL; +} + +const char *qemu_opt_get(QemuOpts *opts, const char *name) +{ + QemuOpt *opt = qemu_opt_find(opts, name); + return opt ? opt->str : NULL; +} + +int qemu_opt_get_bool(QemuOpts *opts, const char *name, int defval) +{ + QemuOpt *opt = qemu_opt_find(opts, name); + + if (opt == NULL) + return defval; + assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL); + return opt->value.bool; +} + +uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval) +{ + QemuOpt *opt = qemu_opt_find(opts, name); + + if (opt == NULL) + return defval; + assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER); + return opt->value.uint; +} + +uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval) +{ + QemuOpt *opt = qemu_opt_find(opts, name); + + if (opt == NULL) + return defval; + assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE); + return opt->value.uint; +} + +static int qemu_opt_parse(QemuOpt *opt) +{ + if (opt->desc == NULL) + return 0; + switch (opt->desc->type) { + case QEMU_OPT_STRING: + /* nothing */ + return 0; + case QEMU_OPT_BOOL: + return parse_option_bool(opt->name, opt->str, &opt->value.bool); + case QEMU_OPT_NUMBER: + return parse_option_number(opt->name, opt->str, &opt->value.uint); + case QEMU_OPT_SIZE: + return parse_option_size(opt->name, opt->str, &opt->value.uint); + default: + abort(); + } +} + +static void qemu_opt_del(QemuOpt *opt) +{ + TAILQ_REMOVE(&opt->opts->head, opt, next); + qemu_free((/* !const */ char*)opt->name); + qemu_free((/* !const */ char*)opt->str); + qemu_free(opt); +} + +int qemu_opt_set(QemuOpts *opts, const char *name, const char *value) +{ + QemuOpt *opt; + + opt = qemu_opt_find(opts, name); + if (!opt) { + QemuOptDesc *desc = opts->list->desc; + int i; + + for (i = 0; desc[i].name != NULL; i++) { + if (strcmp(desc[i].name, name) == 0) { + break; + } + } + if (desc[i].name == NULL) { + if (i == 0) { + /* empty list -> allow any */; + } else { + fprintf(stderr, "option \"%s\" is not valid for %s\n", + name, opts->list->name); + return -1; + } + } + opt = qemu_mallocz(sizeof(*opt)); + opt->name = qemu_strdup(name); + opt->opts = opts; + TAILQ_INSERT_TAIL(&opts->head, opt, next); + if (desc[i].name != NULL) { + opt->desc = desc+i; + } + } + qemu_free((/* !const */ char*)opt->str); + opt->str = NULL; + if (value) { + opt->str = qemu_strdup(value); + } + if (qemu_opt_parse(opt) < 0) { + fprintf(stderr, "Failed to parse \"%s\" for \"%s.%s\"\n", opt->str, + opts->list->name, opt->name); + qemu_opt_del(opt); + return -1; + } + return 0; +} + +QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id) +{ + QemuOpts *opts; + + TAILQ_FOREACH(opts, &list->head, next) { + if (!opts->id) { + continue; + } + if (strcmp(opts->id, id) != 0) { + continue; + } + return opts; + } + return NULL; +} + +QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int fail_if_exists) +{ + QemuOpts *opts = NULL; + + if (id) { + opts = qemu_opts_find(list, id); + if (opts != NULL) { + if (fail_if_exists) { + fprintf(stderr, "tried to create id \"%s\" twice for \"%s\"\n", + id, list->name); + return NULL; + } else { + return opts; + } + } + } + opts = qemu_mallocz(sizeof(*opts)); + if (id) { + opts->id = qemu_strdup(id); + } + opts->list = list; + TAILQ_INIT(&opts->head); + TAILQ_INSERT_TAIL(&list->head, opts, next); + return opts; +} + +int qemu_opts_set(QemuOptsList *list, const char *id, + const char *name, const char *value) +{ + QemuOpts *opts; + + opts = qemu_opts_create(list, id, 1); + if (opts == NULL) { + fprintf(stderr, "id \"%s\" not found for \"%s\"\n", + id, list->name); + return -1; + } + return qemu_opt_set(opts, name, value); +} + +void qemu_opts_del(QemuOpts *opts) +{ + QemuOpt *opt; + + for (;;) { + opt = TAILQ_FIRST(&opts->head); + if (opt == NULL) + break; + qemu_opt_del(opt); + } + TAILQ_REMOVE(&opts->list->head, opts, next); + qemu_free(opts); +} + +int qemu_opts_print(QemuOpts *opts, void *dummy) +{ + QemuOpt *opt; + + fprintf(stderr, "%s: %s:", opts->list->name, + opts->id ? opts->id : "<noid>"); + TAILQ_FOREACH(opt, &opts->head, next) { + fprintf(stderr, " %s=\"%s\"", opt->name, opt->str); + } + fprintf(stderr, "\n"); + return 0; +} + +QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, const char *firstname) +{ + char option[128], value[128], *id = NULL; + QemuOpts *opts; + const char *p,*pe,*pc; + + if (get_param_value(value, sizeof(value), "id", params)) + id = qemu_strdup(value); + opts = qemu_opts_create(list, id, 1); + if (opts == NULL) + return NULL; + + p = params; + for(;;) { + pe = strchr(p, '='); + pc = strchr(p, ','); + if (!pe || (pc && pc < pe)) { + /* found "foo,more" */ + if (p == params && firstname) { + /* implicitly named first option */ + pstrcpy(option, sizeof(option), firstname); + p = get_opt_value(value, sizeof(value), p); + } else { + /* option without value, probably a flag */ + p = get_opt_name(option, sizeof(option), p, ','); + if (strncmp(p, "no", 2) == 0) { + memmove(option, option+2, strlen(option+2)+1); + pstrcpy(value, sizeof(value), "off"); + } else { + pstrcpy(value, sizeof(value), "on"); + } + } + } else { + /* found "foo=bar,more" */ + p = get_opt_name(option, sizeof(option), p, '='); + if (*p != '=') { + break; + } + p++; + p = get_opt_value(value, sizeof(value), p); + } + if (strcmp(option, "id") != 0) { + /* store and parse */ + if (-1 == qemu_opt_set(opts, option, value)) { + qemu_opts_del(opts); + return NULL; + } + } + if (*p != ',') { + break; + } + p++; + } + return opts; +} + +int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque, + int abort_on_failure) +{ + QemuOpts *opts; + int rc = 0; + + TAILQ_FOREACH(opts, &list->head, next) { + rc = func(opts, opaque); + if (abort_on_failure && rc != 0) + break; + } + return rc; +} diff --git a/qemu-option.h b/qemu-option.h index 267abae297..428c947946 100644 --- a/qemu-option.h +++ b/qemu-option.h @@ -26,6 +26,8 @@ #ifndef QEMU_OPTIONS_H #define QEMU_OPTIONS_H +#include "sys-queue.h" + enum QEMUOptionParType { OPT_FLAG, OPT_NUMBER, @@ -72,4 +74,47 @@ void free_option_parameters(QEMUOptionParameter *list); void print_option_parameters(QEMUOptionParameter *list); void print_option_help(QEMUOptionParameter *list); +/* ------------------------------------------------------------------ */ + +typedef struct QemuOpt QemuOpt; +typedef struct QemuOpts QemuOpts; +typedef struct QemuOptsList QemuOptsList; + +enum QemuOptType { + QEMU_OPT_STRING = 0, /* no parsing (use string as-is) */ + QEMU_OPT_BOOL, /* on/off */ + QEMU_OPT_NUMBER, /* simple number */ + QEMU_OPT_SIZE, /* size, accepts (K)ilo, (M)ega, (G)iga, (T)era postfix */ +}; + +typedef struct QemuOptDesc { + const char *name; + enum QemuOptType type; + const char *help; +} QemuOptDesc; + +struct QemuOptsList { + const char *name; + TAILQ_HEAD(, QemuOpts) head; + QemuOptDesc desc[]; +}; + +const char *qemu_opt_get(QemuOpts *opts, const char *name); +int qemu_opt_get_bool(QemuOpts *opts, const char *name, int defval); +uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval); +uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval); +int qemu_opt_set(QemuOpts *opts, const char *name, const char *value); + +QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id); +QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int fail_if_exists); +int qemu_opts_set(QemuOptsList *list, const char *id, + const char *name, const char *value); +void qemu_opts_del(QemuOpts *opts); +QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, const char *firstname); + +typedef int (*qemu_opts_loopfunc)(QemuOpts *opts, void *opaque); +int qemu_opts_print(QemuOpts *opts, void *dummy); +int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque, + int abort_on_failure); + #endif |