drivers/gpu/drm/nouveau/core/core/option.c

   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))
 102                                         level = NV_DBG_FATAL;
 103                                 else if (!strncasecmpz(optstr, "error", len))
 104                                         level = NV_DBG_ERROR;
 105                                 else if (!strncasecmpz(optstr, "warn", len))
 106                                         level = NV_DBG_WARN;
 107                                 else if (!strncasecmpz(optstr, "info", len))
 108                                         level = NV_DBG_INFO_NORMAL;
 109                                 else if (!strncasecmpz(optstr, "debug", len))
 110                                         level = NV_DBG_DEBUG;
 111                                 else if (!strncasecmpz(optstr, "trace", len))
 112                                         level = NV_DBG_TRACE;
 113                                 else if (!strncasecmpz(optstr, "paranoia", len))
 114                                         level = NV_DBG_PARANOIA;
 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 }