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#include <core/option.h>
 25#include <core/debug.h>
 26
 27const char *
 28nvkm_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
 53bool
 54nvkm_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
 76long
 77nvkm_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
 94int
 95nvkm_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}