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option.c
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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 
25 #include <core/option.h>
26 #include <core/debug.h>
27 
28 /* compares unterminated string 'str' with zero-terminated string 'cmp' */
29 static inline int
30 strncasecmpz(const char *str, const char *cmp, size_t len)
31 {
32  if (strlen(cmp) != len)
33  return len;
34  return strncasecmp(str, cmp, len);
35 }
36 
37 const char *
38 nouveau_stropt(const char *optstr, const char *opt, int *arglen)
39 {
40  while (optstr && *optstr != '\0') {
41  int len = strcspn(optstr, ",=");
42  switch (optstr[len]) {
43  case '=':
44  if (!strncasecmpz(optstr, opt, len)) {
45  optstr += len + 1;
46  *arglen = strcspn(optstr, ",=");
47  return *arglen ? optstr : NULL;
48  }
49  optstr++;
50  break;
51  case ',':
52  optstr++;
53  break;
54  default:
55  break;
56  }
57  optstr += len;
58  }
59 
60  return NULL;
61 }
62 
63 bool
64 nouveau_boolopt(const char *optstr, const char *opt, bool value)
65 {
66  int arglen;
67 
68  optstr = nouveau_stropt(optstr, opt, &arglen);
69  if (optstr) {
70  if (!strncasecmpz(optstr, "0", arglen) ||
71  !strncasecmpz(optstr, "no", arglen) ||
72  !strncasecmpz(optstr, "off", arglen) ||
73  !strncasecmpz(optstr, "false", arglen))
74  value = false;
75  else
76  if (!strncasecmpz(optstr, "1", arglen) ||
77  !strncasecmpz(optstr, "yes", arglen) ||
78  !strncasecmpz(optstr, "on", arglen) ||
79  !strncasecmpz(optstr, "true", arglen))
80  value = true;
81  }
82 
83  return value;
84 }
85 
86 int
87 nouveau_dbgopt(const char *optstr, const char *sub)
88 {
89  int mode = 1, level = CONFIG_NOUVEAU_DEBUG_DEFAULT;
90 
91  while (optstr) {
92  int len = strcspn(optstr, ",=");
93  switch (optstr[len]) {
94  case '=':
95  if (strncasecmpz(optstr, sub, len))
96  mode = 0;
97  optstr++;
98  break;
99  default:
100  if (mode) {
101  if (!strncasecmpz(optstr, "fatal", len))
103  else if (!strncasecmpz(optstr, "error", len))
105  else if (!strncasecmpz(optstr, "warn", len))
106  level = NV_DBG_WARN;
107  else if (!strncasecmpz(optstr, "info", len))
108  level = NV_DBG_INFO;
109  else if (!strncasecmpz(optstr, "debug", len))
111  else if (!strncasecmpz(optstr, "trace", len))
113  else if (!strncasecmpz(optstr, "paranoia", len))
115  else if (!strncasecmpz(optstr, "spam", len))
116  level = NV_DBG_SPAM;
117  }
118 
119  if (optstr[len] != '\0') {
120  optstr++;
121  mode = 1;
122  break;
123  }
124 
125  return level;
126  }
127  optstr += len;
128  }
129 
130  return level;
131 }