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/*
* Copyright © 2015 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <errno.h>
#include <string.h>
#include "debug.h"
#include "u_string.h"
uint64_t
parse_debug_string(const char *debug,
const struct debug_control *control)
{
uint64_t flag = 0;
if (debug != NULL) {
for (; control->string != NULL; control++) {
if (!strcmp(debug, "all")) {
flag |= control->flag;
} else {
const char *s = debug;
unsigned n;
for (; n = strcspn(s, ", "), *s; s += MAX2(1, n)) {
if (strlen(control->string) == n &&
!strncmp(control->string, s, n))
flag |= control->flag;
}
}
}
}
return flag;
}
bool
comma_separated_list_contains(const char *list, const char *s)
{
assert(list);
const size_t len = strlen(s);
for (unsigned n; n = strcspn(list, ","), *list; list += MAX2(1, n)) {
if (n == len && !strncmp(list, s, n))
return true;
}
return false;
}
/**
* Reads an environment variable and interprets its value as a boolean.
*
* Recognizes 0/false/no and 1/true/yes. Other values result in the default value.
*/
bool
env_var_as_boolean(const char *var_name, bool default_value)
{
const char *str = getenv(var_name);
if (str == NULL)
return default_value;
if (strcmp(str, "1") == 0 ||
strcasecmp(str, "true") == 0 ||
strcasecmp(str, "y") == 0 ||
strcasecmp(str, "yes") == 0) {
return true;
} else if (strcmp(str, "0") == 0 ||
strcasecmp(str, "false") == 0 ||
strcasecmp(str, "n") == 0 ||
strcasecmp(str, "no") == 0) {
return false;
} else {
return default_value;
}
}
/**
* Reads an environment variable and interprets its value as a unsigned.
*/
unsigned
env_var_as_unsigned(const char *var_name, unsigned default_value)
{
char *str = getenv(var_name);
if (str) {
char *end;
unsigned long result;
errno = 0;
result = strtoul(str, &end, 0);
if (errno == 0 && end != str && *end == '\0')
return result;
}
return default_value;
}