1 /*
2 * Copyright © 2012 Kristian Høgsberg
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining
5 * a copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sublicense, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the
13 * next paragraph) shall be included in all copies or substantial
14 * portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
20 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
21 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 */
25
26 #include "config.h"
27
28 #include <stdbool.h>
29 #include <stdlib.h>
30 #include <stdint.h>
31 #include <stdio.h>
32 #include <string.h>
33 #include <assert.h>
34 #include <errno.h>
35
36 #include <libweston/config-parser.h>
37 #include "string-helpers.h"
38
39 static bool
handle_option(const struct weston_option * option,char * value)40 handle_option(const struct weston_option *option, char *value)
41 {
42 char* p;
43
44 switch (option->type) {
45 case WESTON_OPTION_INTEGER:
46 if (!safe_strtoint(value, option->data))
47 return false;
48 return true;
49 case WESTON_OPTION_UNSIGNED_INTEGER:
50 errno = 0;
51 * (uint32_t *) option->data = strtoul(value, &p, 10);
52 if (errno != 0 || p == value || *p != '\0')
53 return false;
54 return true;
55 case WESTON_OPTION_STRING:
56 * (char **) option->data = strdup(value);
57 return true;
58 default:
59 assert(0);
60 return false;
61 }
62 }
63
64 static bool
long_option(const struct weston_option * options,int count,char * arg)65 long_option(const struct weston_option *options, int count, char *arg)
66 {
67 int k, len;
68
69 for (k = 0; k < count; k++) {
70 if (!options[k].name)
71 continue;
72
73 len = strlen(options[k].name);
74 if (strncmp(options[k].name, arg + 2, len) != 0)
75 continue;
76
77 if (options[k].type == WESTON_OPTION_BOOLEAN) {
78 if (!arg[len + 2]) {
79 * (bool *) options[k].data = true;
80
81 return true;
82 }
83 } else if (arg[len+2] == '=') {
84 return handle_option(options + k, arg + len + 3);
85 }
86 }
87
88 return false;
89 }
90
91 static bool
long_option_with_arg(const struct weston_option * options,int count,char * arg,char * param)92 long_option_with_arg(const struct weston_option *options, int count, char *arg,
93 char *param)
94 {
95 int k, len;
96
97 for (k = 0; k < count; k++) {
98 if (!options[k].name)
99 continue;
100
101 len = strlen(options[k].name);
102 if (strncmp(options[k].name, arg + 2, len) != 0)
103 continue;
104
105 /* Since long_option() should handle all booleans, we should
106 * never reach this
107 */
108 assert(options[k].type != WESTON_OPTION_BOOLEAN);
109
110 return handle_option(options + k, param);
111 }
112
113 return false;
114 }
115
116 static bool
short_option(const struct weston_option * options,int count,char * arg)117 short_option(const struct weston_option *options, int count, char *arg)
118 {
119 int k;
120
121 if (!arg[1])
122 return false;
123
124 for (k = 0; k < count; k++) {
125 if (options[k].short_name != arg[1])
126 continue;
127
128 if (options[k].type == WESTON_OPTION_BOOLEAN) {
129 if (!arg[2]) {
130 * (bool *) options[k].data = true;
131
132 return true;
133 }
134 } else if (arg[2]) {
135 return handle_option(options + k, arg + 2);
136 } else {
137 return false;
138 }
139 }
140
141 return false;
142 }
143
144 static bool
short_option_with_arg(const struct weston_option * options,int count,char * arg,char * param)145 short_option_with_arg(const struct weston_option *options, int count, char *arg, char *param)
146 {
147 int k;
148
149 if (!arg[1])
150 return false;
151
152 for (k = 0; k < count; k++) {
153 if (options[k].short_name != arg[1])
154 continue;
155
156 if (options[k].type == WESTON_OPTION_BOOLEAN)
157 continue;
158
159 return handle_option(options + k, param);
160 }
161
162 return false;
163 }
164
165 int
parse_options(const struct weston_option * options,int count,int * argc,char * argv[])166 parse_options(const struct weston_option *options,
167 int count, int *argc, char *argv[])
168 {
169 int i, j;
170
171 for (i = 1, j = 1; i < *argc; i++) {
172 if (argv[i][0] == '-') {
173 if (argv[i][1] == '-') {
174 /* Long option, e.g. --foo or --foo=bar */
175 if (long_option(options, count, argv[i]))
176 continue;
177
178 /* ...also handle --foo bar */
179 if (i + 1 < *argc &&
180 long_option_with_arg(options, count,
181 argv[i], argv[i+1])) {
182 i++;
183 continue;
184 }
185 } else {
186 /* Short option, e.g -f or -f42 */
187 if (short_option(options, count, argv[i]))
188 continue;
189
190 /* ...also handle -f 42 */
191 if (i+1 < *argc &&
192 short_option_with_arg(options, count, argv[i], argv[i+1])) {
193 i++;
194 continue;
195 }
196 }
197 }
198 argv[j++] = argv[i];
199 }
200 argv[j] = NULL;
201 *argc = j;
202
203 return j;
204 }
205