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Use sscanf instead of regex to match the feature names. This is much faster.

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As a side effect, this fixes a memory leak (the regex engine data was never
freed.)


git-svn-id: http://lm-sensors.org/svn/lm-sensors/branches/lm-sensors-3.0.0@4538 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Jean Delvare
2007-07-03 08:18:21 +00:00
parent 5b8b0a0ede
commit dced776a12
1 changed files with 15 additions and 28 deletions
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43
lib/access.c
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@@ -20,7 +20,6 @@
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <regex.h>
#include "access.h"
#include "sensors.h"
#include "data.h"
@@ -28,8 +27,6 @@
#include "proc.h"
#include "general.h"
#define GET_TYPE_REGEX "\\([[:alpha:]]\\{1,\\}\\)[[:digit:]]\\{0,\\}\\(_\\([[:alpha:]]\\{1,\\}\\)\\)\\{0,1\\}"
static int sensors_do_this_chip_sets(sensors_chip_name name);
/* Compare two chips name descriptions, to see whether they could match.
@@ -541,11 +538,10 @@ static struct feature_type_match cpu_matches[] = {
};
static struct feature_type_match matches[] = {
{ "temp", SENSORS_FEATURE_TEMP, temp_matches },
{ "in", SENSORS_FEATURE_IN, in_matches },
{ "fan", SENSORS_FEATURE_FAN, fan_matches },
{ "cpu", SENSORS_FEATURE_UNKNOWN, cpu_matches },
{ "vrm", SENSORS_FEATURE_VRM, 0 },
{ "temp%d%c", SENSORS_FEATURE_TEMP, temp_matches },
{ "in%d%c", SENSORS_FEATURE_IN, in_matches },
{ "fan%d%c", SENSORS_FEATURE_FAN, fan_matches },
{ "cpu%d%c", SENSORS_FEATURE_UNKNOWN, cpu_matches },
{ 0 }
};
@@ -553,39 +549,30 @@ static struct feature_type_match matches[] = {
sensors_feature_type sensors_feature_get_type(
const sensors_feature_data *feature)
{
regmatch_t pmatch[4];
int size_first, size_second, retval, i;
char c;
int i, nr, count;
struct feature_type_match *submatches;
static regex_t reg;
static regex_t *preg = NULL;
if (!preg) {
regcomp(&reg, GET_TYPE_REGEX, 0);
preg = &reg;
}
retval = regexec(preg, feature->name, 4, pmatch, 0);
if (retval == -1)
return SENSORS_FEATURE_UNKNOWN;
size_first = pmatch[1].rm_eo - pmatch[1].rm_so;
size_second = pmatch[3].rm_eo - pmatch[3].rm_so;
/* vrm is special */
if (!strcmp(feature->name, "vrm"))
return SENSORS_FEATURE_VRM;
for(i = 0; matches[i].name != 0; i++)
if (!strncmp(feature->name, matches[i].name, size_first))
if ((count = sscanf(feature->name, matches[i].name, &nr, &c)))
break;
if (matches[i].name == NULL) /* no match */
return SENSORS_FEATURE_UNKNOWN;
else if (size_second == 0) /* single type */
else if (count == 1) /* single type */
return matches[i].type;
else if (matches[i].submatches == NULL) /* not single type, but no submatches */
/* assert: count == 2 */
if (c != '_')
return SENSORS_FEATURE_UNKNOWN;
submatches = matches[i].submatches;
for(i = 0; submatches[i].name != 0; i++)
if (!strcmp(feature->name + pmatch[3].rm_so, submatches[i].name))
if (!strcmp(strchr(feature->name, '_') + 1, submatches[i].name))
return submatches[i].type;
return SENSORS_FEATURE_UNKNOWN;