1 /*
2  * Copyright 2012 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs
23  */
24 #include <core/option.h>
25 #include <core/debug.h>
26 
27 const char *
28 nvkm_stropt(const char *optstr, const char *opt, int *arglen)
29 {
30 	while (optstr && *optstr != '\0') {
31 		int len = strcspn(optstr, ",=");
32 		switch (optstr[len]) {
33 		case '=':
34 			if (!strncasecmpz(optstr, opt, len)) {
35 				optstr += len + 1;
36 				*arglen = strcspn(optstr, ",=");
37 				return *arglen ? optstr : NULL;
38 			}
39 			optstr++;
40 			break;
41 		case ',':
42 			optstr++;
43 			break;
44 		default:
45 			break;
46 		}
47 		optstr += len;
48 	}
49 
50 	return NULL;
51 }
52 
53 bool
54 nvkm_boolopt(const char *optstr, const char *opt, bool value)
55 {
56 	int arglen;
57 
58 	optstr = nvkm_stropt(optstr, opt, &arglen);
59 	if (optstr) {
60 		if (!strncasecmpz(optstr, "0", arglen) ||
61 		    !strncasecmpz(optstr, "no", arglen) ||
62 		    !strncasecmpz(optstr, "off", arglen) ||
63 		    !strncasecmpz(optstr, "false", arglen))
64 			value = false;
65 		else
66 		if (!strncasecmpz(optstr, "1", arglen) ||
67 		    !strncasecmpz(optstr, "yes", arglen) ||
68 		    !strncasecmpz(optstr, "on", arglen) ||
69 		    !strncasecmpz(optstr, "true", arglen))
70 			value = true;
71 	}
72 
73 	return value;
74 }
75 
76 long
77 nvkm_longopt(const char *optstr, const char *opt, long value)
78 {
79 	long result = value;
80 	int arglen;
81 	char *s;
82 
83 	optstr = nvkm_stropt(optstr, opt, &arglen);
84 	if (optstr && (s = kstrndup(optstr, arglen, GFP_KERNEL))) {
85 		int ret = kstrtol(s, 0, &value);
86 		if (ret == 0)
87 			result = value;
88 		kfree(s);
89 	}
90 
91 	return result;
92 }
93 
94 int
95 nvkm_dbgopt(const char *optstr, const char *sub)
96 {
97 	int mode = 1, level = CONFIG_NOUVEAU_DEBUG_DEFAULT;
98 
99 	while (optstr) {
100 		int len = strcspn(optstr, ",=");
101 		switch (optstr[len]) {
102 		case '=':
103 			if (strncasecmpz(optstr, sub, len))
104 				mode = 0;
105 			optstr++;
106 			break;
107 		default:
108 			if (mode) {
109 				if (!strncasecmpz(optstr, "fatal", len))
110 					level = NV_DBG_FATAL;
111 				else if (!strncasecmpz(optstr, "error", len))
112 					level = NV_DBG_ERROR;
113 				else if (!strncasecmpz(optstr, "warn", len))
114 					level = NV_DBG_WARN;
115 				else if (!strncasecmpz(optstr, "info", len))
116 					level = NV_DBG_INFO;
117 				else if (!strncasecmpz(optstr, "debug", len))
118 					level = NV_DBG_DEBUG;
119 				else if (!strncasecmpz(optstr, "trace", len))
120 					level = NV_DBG_TRACE;
121 				else if (!strncasecmpz(optstr, "paranoia", len))
122 					level = NV_DBG_PARANOIA;
123 				else if (!strncasecmpz(optstr, "spam", len))
124 					level = NV_DBG_SPAM;
125 			}
126 
127 			if (optstr[len] != '\0') {
128 				optstr++;
129 				mode = 1;
130 				break;
131 			}
132 
133 			return level;
134 		}
135 		optstr += len;
136 	}
137 
138 	return level;
139 }
140