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/*
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* Commandline option parsing functions
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2009 Kevin Wolf <kwolf@redhat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h> |
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#include <string.h> |
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#include "qemu-common.h" |
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#include "qemu-error.h" |
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#include "qemu-objects.h" |
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#include "qemu-option.h" |
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#include "qerror.h" |
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/*
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* Extracts the name of an option from the parameter string (p points at the
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* first byte of the option name)
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*
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* The option name is delimited by delim (usually , or =) or the string end
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* and is copied into buf. If the option name is longer than buf_size, it is
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* truncated. buf is always zero terminated.
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*
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* The return value is the position of the delimiter/zero byte after the option
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* name in p.
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*/
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const char *get_opt_name(char *buf, int buf_size, const char *p, char delim) |
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{ |
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char *q;
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q = buf; |
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while (*p != '\0' && *p != delim) { |
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if (q && (q - buf) < buf_size - 1) |
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*q++ = *p; |
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p++; |
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} |
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if (q)
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*q = '\0';
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return p;
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} |
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|
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/*
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* Extracts the value of an option from the parameter string p (p points at the
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* first byte of the option value)
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*
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* This function is comparable to get_opt_name with the difference that the
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* delimiter is fixed to be comma which starts a new option. To specify an
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* option value that contains commas, double each comma.
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*/
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const char *get_opt_value(char *buf, int buf_size, const char *p) |
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{ |
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char *q;
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|
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q = buf; |
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while (*p != '\0') { |
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if (*p == ',') { |
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if (*(p + 1) != ',') |
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break;
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p++; |
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} |
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if (q && (q - buf) < buf_size - 1) |
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*q++ = *p; |
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p++; |
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} |
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if (q)
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*q = '\0';
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return p;
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} |
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int get_next_param_value(char *buf, int buf_size, |
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const char *tag, const char **pstr) |
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{ |
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const char *p; |
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char option[128]; |
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p = *pstr; |
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for(;;) {
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p = get_opt_name(option, sizeof(option), p, '='); |
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if (*p != '=') |
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break;
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p++; |
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if (!strcmp(tag, option)) {
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*pstr = get_opt_value(buf, buf_size, p); |
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if (**pstr == ',') { |
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(*pstr)++; |
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} |
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return strlen(buf);
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} else {
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p = get_opt_value(NULL, 0, p); |
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} |
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if (*p != ',') |
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break;
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p++; |
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} |
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return 0; |
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} |
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int get_param_value(char *buf, int buf_size, |
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const char *tag, const char *str) |
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{ |
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return get_next_param_value(buf, buf_size, tag, &str);
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} |
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int check_params(char *buf, int buf_size, |
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const char * const *params, const char *str) |
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{ |
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const char *p; |
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int i;
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p = str; |
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while (*p != '\0') { |
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p = get_opt_name(buf, buf_size, p, '=');
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if (*p != '=') { |
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return -1; |
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} |
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p++; |
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for (i = 0; params[i] != NULL; i++) { |
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if (!strcmp(params[i], buf)) {
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break;
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} |
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} |
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if (params[i] == NULL) { |
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return -1; |
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} |
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p = get_opt_value(NULL, 0, p); |
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if (*p != ',') { |
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break;
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} |
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p++; |
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} |
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return 0; |
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} |
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|
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/*
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* Searches an option list for an option with the given name
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*/
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QEMUOptionParameter *get_option_parameter(QEMUOptionParameter *list, |
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const char *name) |
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{ |
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while (list && list->name) {
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if (!strcmp(list->name, name)) {
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return list;
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} |
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list++; |
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} |
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return NULL; |
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} |
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static int parse_option_bool(const char *name, const char *value, int *ret) |
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{ |
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if (value != NULL) { |
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if (!strcmp(value, "on")) { |
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*ret = 1;
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} else if (!strcmp(value, "off")) { |
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*ret = 0;
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} else {
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qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "'on' or 'off'");
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return -1; |
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} |
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} else {
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*ret = 1;
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} |
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return 0; |
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} |
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static int parse_option_number(const char *name, const char *value, uint64_t *ret) |
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{ |
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char *postfix;
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uint64_t number; |
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if (value != NULL) { |
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number = strtoull(value, &postfix, 0);
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if (*postfix != '\0') { |
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qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a number");
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return -1; |
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} |
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*ret = number; |
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} else {
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qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a number");
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return -1; |
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} |
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return 0; |
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} |
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static int parse_option_size(const char *name, const char *value, uint64_t *ret) |
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{ |
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char *postfix;
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double sizef;
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if (value != NULL) { |
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sizef = strtod(value, &postfix); |
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switch (*postfix) {
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case 'T': |
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sizef *= 1024;
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case 'G': |
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sizef *= 1024;
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case 'M': |
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sizef *= 1024;
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case 'K': |
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case 'k': |
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sizef *= 1024;
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case 'b': |
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case '\0': |
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*ret = (uint64_t) sizef; |
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break;
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default:
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qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a size");
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error_printf_unless_qmp("You may use k, M, G or T suffixes for "
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"kilobytes, megabytes, gigabytes and terabytes.\n");
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return -1; |
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} |
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} else {
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qerror_report(QERR_INVALID_PARAMETER_VALUE, name, "a size");
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return -1; |
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} |
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return 0; |
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} |
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/*
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* Sets the value of a parameter in a given option list. The parsing of the
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* value depends on the type of option:
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*
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* OPT_FLAG (uses value.n):
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* If no value is given, the flag is set to 1.
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* Otherwise the value must be "on" (set to 1) or "off" (set to 0)
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*
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* OPT_STRING (uses value.s):
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* value is strdup()ed and assigned as option value
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*
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* OPT_SIZE (uses value.n):
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* The value is converted to an integer. Suffixes for kilobytes etc. are
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* allowed (powers of 1024).
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*
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* Returns 0 on succes, -1 in error cases
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*/
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int set_option_parameter(QEMUOptionParameter *list, const char *name, |
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const char *value) |
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{ |
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int flag;
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// Find a matching parameter
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list = get_option_parameter(list, name); |
265 |
if (list == NULL) { |
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fprintf(stderr, "Unknown option '%s'\n", name);
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return -1; |
268 |
} |
269 |
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// Process parameter
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switch (list->type) {
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case OPT_FLAG:
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if (parse_option_bool(name, value, &flag) == -1) |
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return -1; |
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list->value.n = flag; |
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break;
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case OPT_STRING:
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if (value != NULL) { |
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list->value.s = qemu_strdup(value); |
281 |
} else {
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fprintf(stderr, "Option '%s' needs a parameter\n", name);
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return -1; |
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} |
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break;
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case OPT_SIZE:
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if (parse_option_size(name, value, &list->value.n) == -1) |
289 |
return -1; |
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break;
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default:
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fprintf(stderr, "Bug: Option '%s' has an unknown type\n", name);
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return -1; |
295 |
} |
296 |
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return 0; |
298 |
} |
299 |
|
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/*
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* Sets the given parameter to an integer instead of a string.
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* This function cannot be used to set string options.
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*
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* Returns 0 on success, -1 in error cases
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*/
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int set_option_parameter_int(QEMUOptionParameter *list, const char *name, |
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uint64_t value) |
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{ |
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// Find a matching parameter
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list = get_option_parameter(list, name); |
311 |
if (list == NULL) { |
312 |
fprintf(stderr, "Unknown option '%s'\n", name);
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return -1; |
314 |
} |
315 |
|
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// Process parameter
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switch (list->type) {
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case OPT_FLAG:
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case OPT_NUMBER:
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320 |
case OPT_SIZE:
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list->value.n = value; |
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break;
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323 |
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default:
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return -1; |
326 |
} |
327 |
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return 0; |
329 |
} |
330 |
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/*
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* Frees a option list. If it contains strings, the strings are freed as well.
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*/
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void free_option_parameters(QEMUOptionParameter *list)
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{ |
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QEMUOptionParameter *cur = list; |
337 |
|
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while (cur && cur->name) {
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if (cur->type == OPT_STRING) {
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340 |
qemu_free(cur->value.s); |
341 |
} |
342 |
cur++; |
343 |
} |
344 |
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qemu_free(list); |
346 |
} |
347 |
|
348 |
/*
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* Count valid options in list
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*/
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351 |
static size_t count_option_parameters(QEMUOptionParameter *list)
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{ |
353 |
size_t num_options = 0;
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354 |
|
355 |
while (list && list->name) {
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356 |
num_options++; |
357 |
list++; |
358 |
} |
359 |
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360 |
return num_options;
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361 |
} |
362 |
|
363 |
/*
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364 |
* Append an option list (list) to an option list (dest).
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365 |
*
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* If dest is NULL, a new copy of list is created.
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367 |
*
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368 |
* Returns a pointer to the first element of dest (or the newly allocated copy)
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369 |
*/
|
370 |
QEMUOptionParameter *append_option_parameters(QEMUOptionParameter *dest, |
371 |
QEMUOptionParameter *list) |
372 |
{ |
373 |
size_t num_options, num_dest_options; |
374 |
|
375 |
num_options = count_option_parameters(dest); |
376 |
num_dest_options = num_options; |
377 |
|
378 |
num_options += count_option_parameters(list); |
379 |
|
380 |
dest = qemu_realloc(dest, (num_options + 1) * sizeof(QEMUOptionParameter)); |
381 |
dest[num_dest_options].name = NULL;
|
382 |
|
383 |
while (list && list->name) {
|
384 |
if (get_option_parameter(dest, list->name) == NULL) { |
385 |
dest[num_dest_options++] = *list; |
386 |
dest[num_dest_options].name = NULL;
|
387 |
} |
388 |
list++; |
389 |
} |
390 |
|
391 |
return dest;
|
392 |
} |
393 |
|
394 |
/*
|
395 |
* Parses a parameter string (param) into an option list (dest).
|
396 |
*
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397 |
* list is the template option list. If dest is NULL, a new copy of list is
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398 |
* created. If list is NULL, this function fails.
|
399 |
*
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400 |
* A parameter string consists of one or more parameters, separated by commas.
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401 |
* Each parameter consists of its name and possibly of a value. In the latter
|
402 |
* case, the value is delimited by an = character. To specify a value which
|
403 |
* contains commas, double each comma so it won't be recognized as the end of
|
404 |
* the parameter.
|
405 |
*
|
406 |
* For more details of the parsing see above.
|
407 |
*
|
408 |
* Returns a pointer to the first element of dest (or the newly allocated copy)
|
409 |
* or NULL in error cases
|
410 |
*/
|
411 |
QEMUOptionParameter *parse_option_parameters(const char *param, |
412 |
QEMUOptionParameter *list, QEMUOptionParameter *dest) |
413 |
{ |
414 |
QEMUOptionParameter *allocated = NULL;
|
415 |
char name[256]; |
416 |
char value[256]; |
417 |
char *param_delim, *value_delim;
|
418 |
char next_delim;
|
419 |
|
420 |
if (list == NULL) { |
421 |
return NULL; |
422 |
} |
423 |
|
424 |
if (dest == NULL) { |
425 |
dest = allocated = append_option_parameters(NULL, list);
|
426 |
} |
427 |
|
428 |
while (*param) {
|
429 |
|
430 |
// Find parameter name and value in the string
|
431 |
param_delim = strchr(param, ',');
|
432 |
value_delim = strchr(param, '=');
|
433 |
|
434 |
if (value_delim && (value_delim < param_delim || !param_delim)) {
|
435 |
next_delim = '=';
|
436 |
} else {
|
437 |
next_delim = ',';
|
438 |
value_delim = NULL;
|
439 |
} |
440 |
|
441 |
param = get_opt_name(name, sizeof(name), param, next_delim);
|
442 |
if (value_delim) {
|
443 |
param = get_opt_value(value, sizeof(value), param + 1); |
444 |
} |
445 |
if (*param != '\0') { |
446 |
param++; |
447 |
} |
448 |
|
449 |
// Set the parameter
|
450 |
if (set_option_parameter(dest, name, value_delim ? value : NULL)) { |
451 |
goto fail;
|
452 |
} |
453 |
} |
454 |
|
455 |
return dest;
|
456 |
|
457 |
fail:
|
458 |
// Only free the list if it was newly allocated
|
459 |
free_option_parameters(allocated); |
460 |
return NULL; |
461 |
} |
462 |
|
463 |
/*
|
464 |
* Prints all options of a list that have a value to stdout
|
465 |
*/
|
466 |
void print_option_parameters(QEMUOptionParameter *list)
|
467 |
{ |
468 |
while (list && list->name) {
|
469 |
switch (list->type) {
|
470 |
case OPT_STRING:
|
471 |
if (list->value.s != NULL) { |
472 |
printf("%s='%s' ", list->name, list->value.s);
|
473 |
} |
474 |
break;
|
475 |
case OPT_FLAG:
|
476 |
printf("%s=%s ", list->name, list->value.n ? "on" : "off"); |
477 |
break;
|
478 |
case OPT_SIZE:
|
479 |
case OPT_NUMBER:
|
480 |
printf("%s=%" PRId64 " ", list->name, list->value.n); |
481 |
break;
|
482 |
default:
|
483 |
printf("%s=(unkown type) ", list->name);
|
484 |
break;
|
485 |
} |
486 |
list++; |
487 |
} |
488 |
} |
489 |
|
490 |
/*
|
491 |
* Prints an overview of all available options
|
492 |
*/
|
493 |
void print_option_help(QEMUOptionParameter *list)
|
494 |
{ |
495 |
printf("Supported options:\n");
|
496 |
while (list && list->name) {
|
497 |
printf("%-16s %s\n", list->name,
|
498 |
list->help ? list->help : "No description available");
|
499 |
list++; |
500 |
} |
501 |
} |
502 |
|
503 |
/* ------------------------------------------------------------------ */
|
504 |
|
505 |
struct QemuOpt {
|
506 |
const char *name; |
507 |
const char *str; |
508 |
|
509 |
const QemuOptDesc *desc;
|
510 |
union {
|
511 |
int boolean;
|
512 |
uint64_t uint; |
513 |
} value; |
514 |
|
515 |
QemuOpts *opts; |
516 |
QTAILQ_ENTRY(QemuOpt) next; |
517 |
}; |
518 |
|
519 |
struct QemuOpts {
|
520 |
char *id;
|
521 |
QemuOptsList *list; |
522 |
Location loc; |
523 |
QTAILQ_HEAD(QemuOptHead, QemuOpt) head; |
524 |
QTAILQ_ENTRY(QemuOpts) next; |
525 |
}; |
526 |
|
527 |
static QemuOpt *qemu_opt_find(QemuOpts *opts, const char *name) |
528 |
{ |
529 |
QemuOpt *opt; |
530 |
|
531 |
QTAILQ_FOREACH_REVERSE(opt, &opts->head, QemuOptHead, next) { |
532 |
if (strcmp(opt->name, name) != 0) |
533 |
continue;
|
534 |
return opt;
|
535 |
} |
536 |
return NULL; |
537 |
} |
538 |
|
539 |
const char *qemu_opt_get(QemuOpts *opts, const char *name) |
540 |
{ |
541 |
QemuOpt *opt = qemu_opt_find(opts, name); |
542 |
return opt ? opt->str : NULL; |
543 |
} |
544 |
|
545 |
int qemu_opt_get_bool(QemuOpts *opts, const char *name, int defval) |
546 |
{ |
547 |
QemuOpt *opt = qemu_opt_find(opts, name); |
548 |
|
549 |
if (opt == NULL) |
550 |
return defval;
|
551 |
assert(opt->desc && opt->desc->type == QEMU_OPT_BOOL); |
552 |
return opt->value.boolean;
|
553 |
} |
554 |
|
555 |
uint64_t qemu_opt_get_number(QemuOpts *opts, const char *name, uint64_t defval) |
556 |
{ |
557 |
QemuOpt *opt = qemu_opt_find(opts, name); |
558 |
|
559 |
if (opt == NULL) |
560 |
return defval;
|
561 |
assert(opt->desc && opt->desc->type == QEMU_OPT_NUMBER); |
562 |
return opt->value.uint;
|
563 |
} |
564 |
|
565 |
uint64_t qemu_opt_get_size(QemuOpts *opts, const char *name, uint64_t defval) |
566 |
{ |
567 |
QemuOpt *opt = qemu_opt_find(opts, name); |
568 |
|
569 |
if (opt == NULL) |
570 |
return defval;
|
571 |
assert(opt->desc && opt->desc->type == QEMU_OPT_SIZE); |
572 |
return opt->value.uint;
|
573 |
} |
574 |
|
575 |
static int qemu_opt_parse(QemuOpt *opt) |
576 |
{ |
577 |
if (opt->desc == NULL) |
578 |
return 0; |
579 |
switch (opt->desc->type) {
|
580 |
case QEMU_OPT_STRING:
|
581 |
/* nothing */
|
582 |
return 0; |
583 |
case QEMU_OPT_BOOL:
|
584 |
return parse_option_bool(opt->name, opt->str, &opt->value.boolean);
|
585 |
case QEMU_OPT_NUMBER:
|
586 |
return parse_option_number(opt->name, opt->str, &opt->value.uint);
|
587 |
case QEMU_OPT_SIZE:
|
588 |
return parse_option_size(opt->name, opt->str, &opt->value.uint);
|
589 |
default:
|
590 |
abort(); |
591 |
} |
592 |
} |
593 |
|
594 |
static void qemu_opt_del(QemuOpt *opt) |
595 |
{ |
596 |
QTAILQ_REMOVE(&opt->opts->head, opt, next); |
597 |
qemu_free((/* !const */ char*)opt->name); |
598 |
qemu_free((/* !const */ char*)opt->str); |
599 |
qemu_free(opt); |
600 |
} |
601 |
|
602 |
int qemu_opt_set(QemuOpts *opts, const char *name, const char *value) |
603 |
{ |
604 |
QemuOpt *opt; |
605 |
const QemuOptDesc *desc = opts->list->desc;
|
606 |
int i;
|
607 |
|
608 |
for (i = 0; desc[i].name != NULL; i++) { |
609 |
if (strcmp(desc[i].name, name) == 0) { |
610 |
break;
|
611 |
} |
612 |
} |
613 |
if (desc[i].name == NULL) { |
614 |
if (i == 0) { |
615 |
/* empty list -> allow any */;
|
616 |
} else {
|
617 |
qerror_report(QERR_INVALID_PARAMETER, name); |
618 |
return -1; |
619 |
} |
620 |
} |
621 |
|
622 |
opt = qemu_mallocz(sizeof(*opt));
|
623 |
opt->name = qemu_strdup(name); |
624 |
opt->opts = opts; |
625 |
QTAILQ_INSERT_TAIL(&opts->head, opt, next); |
626 |
if (desc[i].name != NULL) { |
627 |
opt->desc = desc+i; |
628 |
} |
629 |
if (value) {
|
630 |
opt->str = qemu_strdup(value); |
631 |
} |
632 |
if (qemu_opt_parse(opt) < 0) { |
633 |
qemu_opt_del(opt); |
634 |
return -1; |
635 |
} |
636 |
return 0; |
637 |
} |
638 |
|
639 |
int qemu_opt_foreach(QemuOpts *opts, qemu_opt_loopfunc func, void *opaque, |
640 |
int abort_on_failure)
|
641 |
{ |
642 |
QemuOpt *opt; |
643 |
int rc = 0; |
644 |
|
645 |
QTAILQ_FOREACH(opt, &opts->head, next) { |
646 |
rc = func(opt->name, opt->str, opaque); |
647 |
if (abort_on_failure && rc != 0) |
648 |
break;
|
649 |
} |
650 |
return rc;
|
651 |
} |
652 |
|
653 |
QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id) |
654 |
{ |
655 |
QemuOpts *opts; |
656 |
|
657 |
QTAILQ_FOREACH(opts, &list->head, next) { |
658 |
if (!opts->id) {
|
659 |
continue;
|
660 |
} |
661 |
if (strcmp(opts->id, id) != 0) { |
662 |
continue;
|
663 |
} |
664 |
return opts;
|
665 |
} |
666 |
return NULL; |
667 |
} |
668 |
|
669 |
static int id_wellformed(const char *id) |
670 |
{ |
671 |
int i;
|
672 |
|
673 |
if (!qemu_isalpha(id[0])) { |
674 |
return 0; |
675 |
} |
676 |
for (i = 1; id[i]; i++) { |
677 |
if (!qemu_isalnum(id[i]) && !strchr("-._", id[i])) { |
678 |
return 0; |
679 |
} |
680 |
} |
681 |
return 1; |
682 |
} |
683 |
|
684 |
QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id, int fail_if_exists) |
685 |
{ |
686 |
QemuOpts *opts = NULL;
|
687 |
|
688 |
if (id) {
|
689 |
if (!id_wellformed(id)) {
|
690 |
qerror_report(QERR_INVALID_PARAMETER_VALUE, "id", "an identifier"); |
691 |
error_printf_unless_qmp("Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.\n");
|
692 |
return NULL; |
693 |
} |
694 |
opts = qemu_opts_find(list, id); |
695 |
if (opts != NULL) { |
696 |
if (fail_if_exists) {
|
697 |
qerror_report(QERR_DUPLICATE_ID, id, list->name); |
698 |
return NULL; |
699 |
} else {
|
700 |
return opts;
|
701 |
} |
702 |
} |
703 |
} |
704 |
opts = qemu_mallocz(sizeof(*opts));
|
705 |
if (id) {
|
706 |
opts->id = qemu_strdup(id); |
707 |
} |
708 |
opts->list = list; |
709 |
loc_save(&opts->loc); |
710 |
QTAILQ_INIT(&opts->head); |
711 |
QTAILQ_INSERT_TAIL(&list->head, opts, next); |
712 |
return opts;
|
713 |
} |
714 |
|
715 |
void qemu_opts_reset(QemuOptsList *list)
|
716 |
{ |
717 |
QemuOpts *opts, *next_opts; |
718 |
|
719 |
QTAILQ_FOREACH_SAFE(opts, &list->head, next, next_opts) { |
720 |
qemu_opts_del(opts); |
721 |
} |
722 |
} |
723 |
|
724 |
void qemu_opts_loc_restore(QemuOpts *opts)
|
725 |
{ |
726 |
loc_restore(&opts->loc); |
727 |
} |
728 |
|
729 |
int qemu_opts_set(QemuOptsList *list, const char *id, |
730 |
const char *name, const char *value) |
731 |
{ |
732 |
QemuOpts *opts; |
733 |
|
734 |
opts = qemu_opts_create(list, id, 1);
|
735 |
if (opts == NULL) { |
736 |
return -1; |
737 |
} |
738 |
return qemu_opt_set(opts, name, value);
|
739 |
} |
740 |
|
741 |
const char *qemu_opts_id(QemuOpts *opts) |
742 |
{ |
743 |
return opts->id;
|
744 |
} |
745 |
|
746 |
void qemu_opts_del(QemuOpts *opts)
|
747 |
{ |
748 |
QemuOpt *opt; |
749 |
|
750 |
for (;;) {
|
751 |
opt = QTAILQ_FIRST(&opts->head); |
752 |
if (opt == NULL) |
753 |
break;
|
754 |
qemu_opt_del(opt); |
755 |
} |
756 |
QTAILQ_REMOVE(&opts->list->head, opts, next); |
757 |
qemu_free(opts->id); |
758 |
qemu_free(opts); |
759 |
} |
760 |
|
761 |
int qemu_opts_print(QemuOpts *opts, void *dummy) |
762 |
{ |
763 |
QemuOpt *opt; |
764 |
|
765 |
fprintf(stderr, "%s: %s:", opts->list->name,
|
766 |
opts->id ? opts->id : "<noid>");
|
767 |
QTAILQ_FOREACH(opt, &opts->head, next) { |
768 |
fprintf(stderr, " %s=\"%s\"", opt->name, opt->str);
|
769 |
} |
770 |
fprintf(stderr, "\n");
|
771 |
return 0; |
772 |
} |
773 |
|
774 |
int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname) |
775 |
{ |
776 |
char option[128], value[1024]; |
777 |
const char *p,*pe,*pc; |
778 |
|
779 |
for (p = params; *p != '\0'; p++) { |
780 |
pe = strchr(p, '=');
|
781 |
pc = strchr(p, ',');
|
782 |
if (!pe || (pc && pc < pe)) {
|
783 |
/* found "foo,more" */
|
784 |
if (p == params && firstname) {
|
785 |
/* implicitly named first option */
|
786 |
pstrcpy(option, sizeof(option), firstname);
|
787 |
p = get_opt_value(value, sizeof(value), p);
|
788 |
} else {
|
789 |
/* option without value, probably a flag */
|
790 |
p = get_opt_name(option, sizeof(option), p, ','); |
791 |
if (strncmp(option, "no", 2) == 0) { |
792 |
memmove(option, option+2, strlen(option+2)+1); |
793 |
pstrcpy(value, sizeof(value), "off"); |
794 |
} else {
|
795 |
pstrcpy(value, sizeof(value), "on"); |
796 |
} |
797 |
} |
798 |
} else {
|
799 |
/* found "foo=bar,more" */
|
800 |
p = get_opt_name(option, sizeof(option), p, '='); |
801 |
if (*p != '=') { |
802 |
break;
|
803 |
} |
804 |
p++; |
805 |
p = get_opt_value(value, sizeof(value), p);
|
806 |
} |
807 |
if (strcmp(option, "id") != 0) { |
808 |
/* store and parse */
|
809 |
if (qemu_opt_set(opts, option, value) == -1) { |
810 |
return -1; |
811 |
} |
812 |
} |
813 |
if (*p != ',') { |
814 |
break;
|
815 |
} |
816 |
} |
817 |
return 0; |
818 |
} |
819 |
|
820 |
QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, |
821 |
int permit_abbrev)
|
822 |
{ |
823 |
const char *firstname; |
824 |
char value[1024], *id = NULL; |
825 |
const char *p; |
826 |
QemuOpts *opts; |
827 |
|
828 |
assert(!permit_abbrev || list->implied_opt_name); |
829 |
firstname = permit_abbrev ? list->implied_opt_name : NULL;
|
830 |
|
831 |
if (strncmp(params, "id=", 3) == 0) { |
832 |
get_opt_value(value, sizeof(value), params+3); |
833 |
id = value; |
834 |
} else if ((p = strstr(params, ",id=")) != NULL) { |
835 |
get_opt_value(value, sizeof(value), p+4); |
836 |
id = value; |
837 |
} |
838 |
opts = qemu_opts_create(list, id, 1);
|
839 |
if (opts == NULL) |
840 |
return NULL; |
841 |
|
842 |
if (qemu_opts_do_parse(opts, params, firstname) != 0) { |
843 |
qemu_opts_del(opts); |
844 |
return NULL; |
845 |
} |
846 |
|
847 |
return opts;
|
848 |
} |
849 |
|
850 |
static void qemu_opts_from_qdict_1(const char *key, QObject *obj, void *opaque) |
851 |
{ |
852 |
char buf[32]; |
853 |
const char *value; |
854 |
int n;
|
855 |
|
856 |
if (!strcmp(key, "id")) { |
857 |
return;
|
858 |
} |
859 |
|
860 |
switch (qobject_type(obj)) {
|
861 |
case QTYPE_QSTRING:
|
862 |
value = qstring_get_str(qobject_to_qstring(obj)); |
863 |
break;
|
864 |
case QTYPE_QINT:
|
865 |
n = snprintf(buf, sizeof(buf), "%" PRId64, |
866 |
qint_get_int(qobject_to_qint(obj))); |
867 |
assert(n < sizeof(buf));
|
868 |
value = buf; |
869 |
break;
|
870 |
case QTYPE_QFLOAT:
|
871 |
n = snprintf(buf, sizeof(buf), "%.17g", |
872 |
qfloat_get_double(qobject_to_qfloat(obj))); |
873 |
assert(n < sizeof(buf));
|
874 |
value = buf; |
875 |
break;
|
876 |
case QTYPE_QBOOL:
|
877 |
pstrcpy(buf, sizeof(buf),
|
878 |
qbool_get_int(qobject_to_qbool(obj)) ? "on" : "off"); |
879 |
value = buf; |
880 |
break;
|
881 |
default:
|
882 |
return;
|
883 |
} |
884 |
qemu_opt_set(opaque, key, value); |
885 |
} |
886 |
|
887 |
/*
|
888 |
* Create QemuOpts from a QDict.
|
889 |
* Use value of key "id" as ID if it exists and is a QString.
|
890 |
* Only QStrings, QInts, QFloats and QBools are copied. Entries with
|
891 |
* other types are silently ignored.
|
892 |
*/
|
893 |
QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict)
|
894 |
{ |
895 |
QemuOpts *opts; |
896 |
|
897 |
opts = qemu_opts_create(list, qdict_get_try_str(qdict, "id"), 1); |
898 |
if (opts == NULL) |
899 |
return NULL; |
900 |
|
901 |
qdict_iter(qdict, qemu_opts_from_qdict_1, opts); |
902 |
return opts;
|
903 |
} |
904 |
|
905 |
/*
|
906 |
* Convert from QemuOpts to QDict.
|
907 |
* The QDict values are of type QString.
|
908 |
* TODO We'll want to use types appropriate for opt->desc->type, but
|
909 |
* this is enough for now.
|
910 |
*/
|
911 |
QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict) |
912 |
{ |
913 |
QemuOpt *opt; |
914 |
QObject *val; |
915 |
|
916 |
if (!qdict) {
|
917 |
qdict = qdict_new(); |
918 |
} |
919 |
if (opts->id) {
|
920 |
qdict_put(qdict, "id", qstring_from_str(opts->id));
|
921 |
} |
922 |
QTAILQ_FOREACH(opt, &opts->head, next) { |
923 |
val = QOBJECT(qstring_from_str(opt->str)); |
924 |
qdict_put_obj(qdict, opt->name, val); |
925 |
} |
926 |
return qdict;
|
927 |
} |
928 |
|
929 |
/* Validate parsed opts against descriptions where no
|
930 |
* descriptions were provided in the QemuOptsList.
|
931 |
*/
|
932 |
int qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc) |
933 |
{ |
934 |
QemuOpt *opt; |
935 |
|
936 |
assert(opts->list->desc[0].name == NULL); |
937 |
|
938 |
QTAILQ_FOREACH(opt, &opts->head, next) { |
939 |
int i;
|
940 |
|
941 |
for (i = 0; desc[i].name != NULL; i++) { |
942 |
if (strcmp(desc[i].name, opt->name) == 0) { |
943 |
break;
|
944 |
} |
945 |
} |
946 |
if (desc[i].name == NULL) { |
947 |
qerror_report(QERR_INVALID_PARAMETER, opt->name); |
948 |
return -1; |
949 |
} |
950 |
|
951 |
opt->desc = &desc[i]; |
952 |
|
953 |
if (qemu_opt_parse(opt) < 0) { |
954 |
return -1; |
955 |
} |
956 |
} |
957 |
|
958 |
return 0; |
959 |
} |
960 |
|
961 |
int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque, |
962 |
int abort_on_failure)
|
963 |
{ |
964 |
Location loc; |
965 |
QemuOpts *opts; |
966 |
int rc = 0; |
967 |
|
968 |
loc_push_none(&loc); |
969 |
QTAILQ_FOREACH(opts, &list->head, next) { |
970 |
loc_restore(&opts->loc); |
971 |
rc |= func(opts, opaque); |
972 |
if (abort_on_failure && rc != 0) |
973 |
break;
|
974 |
} |
975 |
loc_pop(&loc); |
976 |
return rc;
|
977 |
} |