mir/lm-sensors
2
0
Fork 0
mirror of https://github.com/lm-sensors/lm-sensors synced 2025-09-05 00:35:35 +00:00
Code Issues Releases Wiki Activity
Files
8138489a72f314166fb8606d3ed66b1a66fa62a0
lm-sensors/lib/data.c
Jean Delvare 8138489a72 struct sensors_proc_chips_entry now has a single member, so we may 
as well use this member directly for slightly more simple code.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/branches/lm-sensors-3.0.0@4474 7894878c-1315-0410-8ee3-d5d059ff63e0
2007-06-26 11:33:09 +00:00

277 lines
8.2 KiB
C
Raw Blame History

/*
data.c - Part of libsensors, a Linux library for reading sensor data.
Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <string.h>
#include "error.h"
#include "data.h"
#include "sensors.h"
#include "../version.h"
const char *libsensors_version = LM_VERSION;
const char *libsensors_date = LM_DATE;
sensors_chip *sensors_config_chips = NULL;
int sensors_config_chips_count = 0;
int sensors_config_chips_max = 0;
sensors_bus *sensors_config_busses = NULL;
int sensors_config_busses_count = 0;
int sensors_config_busses_max = 0;
sensors_chip_name *sensors_proc_chips = NULL;
int sensors_proc_chips_count = 0;
int sensors_proc_chips_max = 0;
sensors_bus *sensors_proc_bus = NULL;
int sensors_proc_bus_count = 0;
int sensors_proc_bus_max = 0;
static int sensors_substitute_chip(sensors_chip_name *name,int lineno);
/* Wow, this must be one of the ugliest functions I have ever written.
The idea is that it parses a chip name. These are valid names:
lm78-i2c-10-5e *-i2c-10-5e
lm78-i2c-10-* *-i2c-10-*
lm78-i2c-*-5e *-i2c-*-5e
lm78-i2c-*-* *-i2c-*-*
lm78-isa-10dd *-isa-10dd
lm78-isa-* *-isa-*
lm78-* *-*
*
Here 'lm78' can be any prefix. To complicate matters, such a prefix
can also contain dashes (like lm78-j, for example!). 'i2c' and 'isa' are
literal strings, just like all dashes '-' and wildcards '*'. '10' can
be any decimal i2c bus number. '5e' can be any hexadecimal i2c device
address, and '10dd' any hexadecimal isa address.
If '*' is used in prefixes, together with dashes, ambigious parses are
introduced. In that case, the prefix is kept as small as possible.
The 'prefix' part in the result is freshly allocated. All old contents
of res is overwritten. res itself is not allocated. In case of an error
return (ie. != 0), res is undefined, but all allocations are undone.
Don't tell me there are bugs in here, because I'll start screaming :-)
*/
int sensors_parse_chip_name(const char *orig_name, sensors_chip_name *res)
{
char *part2, *part3, *part4;
char *name = strdup(orig_name);
int i;
/* Play it safe */
res->busname = NULL;
if (! name)
sensors_fatal_error("sensors_parse_chip_name","Allocating new name");
/* First split name in upto four pieces. */
if ((part4 = strrchr(name,'-')))
*part4++ = '\0';
if ((part3 = strrchr(name,'-')))
*part3++ = '\0';
if ((part2 = strrchr(name,'-')))
*part2++ = '\0';
/* No dashes found? */
if (! part4) {
if (!strcmp(name,"*")) {
res->prefix = SENSORS_CHIP_NAME_PREFIX_ANY;
res->bus = SENSORS_CHIP_NAME_BUS_ANY;
res->addr = SENSORS_CHIP_NAME_ADDR_ANY;
goto SUCCES;
} else
goto ERROR;
}
/* At least one dash found. Now part4 is either '*', or an address */
if (!strcmp(part4,"*"))
res->addr = SENSORS_CHIP_NAME_ADDR_ANY;
else {
if ((strlen(part4) > 4) || (strlen(part4) == 0))
goto ERROR;
res->addr = 0;
for (i = 0; ; i++) {
switch (part4[i]) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
res->addr = res->addr * 16 + part4[i] - '0';
break;
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
res->addr = res->addr * 16 + part4[i] - 'a' + 10;
break;
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
res->addr = res->addr * 16 + part4[i] - 'A' + 10;
break;
case 0:
goto DONE;
default:
goto ERROR;
}
}
DONE:;
}
/* OK. So let's look at part3. It must either be the number of the
i2c bus (and then part2 *must* be "i2c"), or it must be "isa",
or, if part4 was "*", it belongs to 'prefix'. Or no second dash
was found at all, of course. */
if (! part3) {
if (res->addr == SENSORS_CHIP_NAME_ADDR_ANY) {
res->bus = SENSORS_CHIP_NAME_BUS_ANY;
} else
goto ERROR;
} else if (!strcmp(part3,"isa")) {
res->bus = SENSORS_CHIP_NAME_BUS_ISA;
if (part2)
*(part2-1) = '-';
} else if (!strcmp(part3,"pci")) {
res->bus = SENSORS_CHIP_NAME_BUS_PCI;
if (part2)
*(part2-1) = '-';
} else if (part2 && !strcmp(part2,"i2c") && !strcmp(part3,"*"))
res->bus = SENSORS_CHIP_NAME_BUS_ANY_I2C;
else if (part2 && !strcmp(part2,"i2c")) {
if ((strlen(part3) > 3) || (strlen(part3) == 0))
goto ERROR;
res->bus = 0;
for (i = 0; ; i++) {
switch (part3[i]) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
res->bus = res->bus * 10 + part3[i] - '0';
break;
case 0:
goto DONE2;
default:
goto ERROR;
}
}
DONE2:;
} else if (res->addr == SENSORS_CHIP_NAME_ADDR_ANY) {
res->bus = SENSORS_CHIP_NAME_BUS_ANY;
if (part2)
*(part2-1) = '-';
*(part3-1) = '-';
} else if(part3 && part4) {
res->bus = SENSORS_CHIP_NAME_BUS_DUMMY;
if (! (res->busname = strdup(part3)))
sensors_fatal_error("sensors_parse_chip_name","Allocating new busname");
} else
goto ERROR;
if (!strcmp(name,"*"))
res->prefix = SENSORS_CHIP_NAME_PREFIX_ANY;
else if (! (res->prefix = strdup(name)))
sensors_fatal_error("sensors_parse_chip_name","Allocating new name");
goto SUCCES;
SUCCES:
free(name);
return 0;
ERROR:
free(name);
return -SENSORS_ERR_CHIP_NAME;
}
int sensors_parse_i2cbus_name(const char *name, int *res)
{
int i;
if (! strcmp(name,"isa")) {
*res = SENSORS_CHIP_NAME_BUS_ISA;
return 0;
}
if (strncmp(name,"i2c-",4)) {
*res = SENSORS_CHIP_NAME_BUS_DUMMY;
return 0;
}
name += 4;
if ((strlen(name) > 3) || (strlen(name) == 0))
return -SENSORS_ERR_BUS_NAME;
*res = 0;
for (i = 0; ; i++) {
switch (name[i]) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
*res = *res * 10 + name[i] - '0';
break;
case 0:
return 0;
default:
return -SENSORS_ERR_BUS_NAME;
}
}
}
int sensors_substitute_chip(sensors_chip_name *name,int lineno)
{
int i,j;
for (i = 0; i < sensors_config_busses_count; i++)
if (sensors_config_busses[i].number == name->bus)
break;
if (i == sensors_config_busses_count) {
sensors_parse_error("Undeclared i2c bus referenced",lineno);
name->bus = sensors_proc_bus_count;
return -SENSORS_ERR_BUS_NAME;
}
/* Compare the adapter names */
for (j = 0; j < sensors_proc_bus_count; j++) {
if (!strcmp(sensors_config_busses[i].adapter,
sensors_proc_bus[j].adapter)) {
name->bus = sensors_proc_bus[j].number;
return 0;
}
}
/* We did not find anything. sensors_proc_bus_count is not a valid
bus number, so it will never be matched. Good. */
name->bus = sensors_proc_bus_count;
return 0;
}
int sensors_substitute_busses(void)
{
int err,i,j,lineno;
sensors_chip_name_list *chips;
int res=0;
for(i = 0; i < sensors_config_chips_count; i++) {
lineno = sensors_config_chips[i].lineno;
chips = &sensors_config_chips[i].chips;
for(j = 0; j < chips->fits_count; j++)
if ((chips->fits[j].bus != SENSORS_CHIP_NAME_BUS_ISA) &&
(chips->fits[j].bus != SENSORS_CHIP_NAME_BUS_PCI) &&
(chips->fits[j].bus != SENSORS_CHIP_NAME_BUS_DUMMY) &&
(chips->fits[j].bus != SENSORS_CHIP_NAME_BUS_ANY) &&
(chips->fits[j].bus != SENSORS_CHIP_NAME_BUS_ANY_I2C))
if ((err = sensors_substitute_chip(chips->fits+j, lineno)))
res = err;
}
return res;
}
Reference in New Issue View Git Blame Copy Permalink