More library stuff

Nice init and cleanup functions.


git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@97 7894878c-1315-0410-8ee3-d5d059ff63e0

lib/Module.mk

@@ -36,7 +36,8 @@ LIBTARGETS := $(MODULE_DIR)/$(LIBSTLIBNAME) $(MODULE_DIR)/$(LIBSHLIBNAME)
 
 LIBCSOURCES := $(MODULE_DIR)/data.c $(MODULE_DIR)/general.c \
                $(MODULE_DIR)/error.c $(MODULE_DIR)/chips.c \
-               $(MODULE_DIR)/proc.c $(MODULE_DIR)/access.c
+               $(MODULE_DIR)/proc.c $(MODULE_DIR)/access.c \
+               $(MODULE_DIR)/init.c
 LIBOTHEROBJECTS := $(MODULE_DIR)/conf-parse.o $(MODULE_DIR)/conf-lex.o
 LIBSHOBJECTS := $(LIBCSOURCES:.c=.lo) $(LIBOTHEROBJECTS:.o=.lo)
 LIBSTOBJECTS := $(LIBCSOURCES:.c=.ao) $(LIBOTHEROBJECTS:.o=.ao)

lib/access.c

@@ -141,10 +141,12 @@ int sensors_get_label(sensors_chip_name name, int feature, char **result)
   for (chip = NULL; (chip = sensors_for_all_config_chips(name,chip));)
     for (i = 0; i < chip->labels_count; i++)
       if (!strcmp(featureptr->name, chip->labels[i].name)) {
-        *result = strdup(chip->labels[i].name);
+        if (! (*result = strdup(chip->labels[i].name)))
+          sensors_fatal_error("sensors_get_label","Allocating label text");
         return 0;
       }
-  *result = strdup(featureptr->name);
+  if (! (*result = strdup(featureptr->name)))
+    sensors_fatal_error("sensors_get_label","Allocating label text");
   return 0;
 }
 

lib/data.c

@@ -66,6 +66,8 @@ int sensors_parse_chip_name(const char *orig_name, sensors_chip_name *res)
   char *name = strdup(orig_name);
   int i;
 
+  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';
@@ -155,8 +157,8 @@ DONE2:
     
   if (!strcmp(name,"*"))
     res->prefix = SENSORS_CHIP_NAME_PREFIX_ANY;
-  else
-    res->prefix = strdup(name);
+  else if (! (res->prefix = strdup(name)))
+    sensors_fatal_error("sensors_parse_chip_name","Allocating new name");
   goto SUCCES;
 
 SUCCES:

lib/data.h

@@ -22,8 +22,9 @@
 
 #include "sensors.h"
 
-/* This header file contains all kinds of data structures which are
-   internally used. */
+/* This header file contains all kinds of data structures which are used
+   for the representation of the config file data and the /proc/.../chips
+   data. */
 
 typedef enum sensors_operation { 
   sensors_add, sensors_sub, sensors_multiply, sensors_divide, 

lib/error.c

@@ -41,7 +41,7 @@ static const char *errorlist[] =
 
 #define ERROR_LIST_LEN (sizeof(errorlist) / sizeof(char *))
 
-char *sensors_strerror(int errnum)
+const char *sensors_strerror(int errnum)
 {
   if (errnum < 0)
     errnum = -errnum;

lib/error.h

@@ -27,11 +27,12 @@
 #define SENSORS_ERR_DIV_ZERO 5  /* Divide by zero */
 #define SENSORS_ERR_CHIP_NAME 6 /* Can't parse chip name */
 #define SENSORS_ERR_BUS_NAME 7  /* Can't parse bus name */
+#define SENSORS_ERR_PARSE 8     /* General parse error */
 
 /* This function returns a pointer to a string which describes the error.
    errnum may be negative (the corresponding positive error is returned).
    You may not modify the result! */
-extern char *sensors_strerror(int errnum);
+extern const char *sensors_strerror(int errnum);
 
 /* This function is called when a parse error is detected. Give it a new
    value, and your own function is called instead of the default (which

lib/init.c

@@ -0,0 +1,137 @@
+/*
+    init.c - Part of libsensors, a Linux library for reading sensor data.
+    Copyright (c) 1998  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 "sensors.h"
+#include "data.h"
+#include "proc.h"
+#include "error.h"
+
+extern int sensors_yyparse(void);
+
+static void free_proc_chips_entry(sensors_proc_chips_entry entry);
+static void free_chip_name(sensors_chip_name name);
+static void free_bus(sensors_bus bus);
+static void free_chip(sensors_chip chip);
+static void free_label(sensors_label label);
+static void free_set(sensors_set set);
+static void free_compute(sensors_compute compute);
+static void free_expr(sensors_expr *expr);
+
+int sensors_init(void)
+{
+  int res;
+  sensors_cleanup();
+  if ((res = sensors_read_proc_chips()))
+    return res;
+  if ((res = sensors_yyparse()))
+    return SENSORS_ERR_PARSE;
+  return 0;
+}
+
+void sensors_cleanup(void)
+{
+  int i;
+
+  for (i = 0; i < sensors_proc_chips_count; i++)
+    free_proc_chips_entry(sensors_proc_chips[i]);
+  free(sensors_proc_chips);
+  sensors_proc_chips = NULL;
+  sensors_proc_chips_count = sensors_proc_chips_max = 0;
+  
+  for (i = 0; i < sensors_config_busses_count; i++)
+    free_bus(sensors_config_busses[i]);
+  free(sensors_config_busses);
+  sensors_config_busses = NULL;
+  sensors_config_busses_count = sensors_config_busses_max = 0;
+
+  for (i = 0; i < sensors_config_chips_count; i++)
+    free_chip(sensors_config_chips[i]);
+  free(sensors_config_chips);
+  sensors_config_chips = NULL;
+  sensors_config_chips_count = sensors_config_chips_max = 0;
+}
+
+void free_proc_chips_entry(sensors_proc_chips_entry entry)
+{
+    free_chip_name(entry.name);
+}
+
+void free_chip_name(sensors_chip_name name)
+{
+  free(name.prefix);
+}
+
+void free_bus(sensors_bus bus)
+{
+  free(bus.adapter);
+  free(bus.algorithm);
+}
+
+void free_chip(sensors_chip chip)
+{
+  int i;
+
+  for (i = 0; i < chip.labels_count; i++)
+    free_label(chip.labels[i]);
+  free(chip.labels);
+  chip.labels_count = chip.labels_max = 0;
+
+  for (i = 0; i < chip.sets_count; i++)
+    free_set(chip.sets[i]);
+  free(chip.sets);
+  chip.sets_count = chip.sets_max = 0;
+
+  for (i = 0; i < chip.computes_count; i++)
+    free_compute(chip.computes[i]);
+  free(chip.computes);
+  chip.computes_count = chip.computes_max = 0;
+}
+
+void free_label(sensors_label label)
+{
+  free(label.name);
+  free(label.value);
+}
+
+void free_set(sensors_set set)
+{
+  free(set.name);
+  free_expr(set.value);
+}
+
+void free_compute(sensors_compute compute)
+{
+  free(compute.name);
+  free_expr(compute.from_proc);
+  free_expr(compute.to_proc);
+}
+
+void free_expr(sensors_expr *expr)
+{
+  if ((expr->kind) == sensors_kind_var)
+    free(expr->data.var);
+  else if ((expr->kind) == sensors_kind_sub) {
+    if (expr->data.subexpr.sub1)
+      free_expr(expr->data.subexpr.sub1);
+    if (expr->data.subexpr.sub2)
+      free_expr(expr->data.subexpr.sub2);
+  }
+  free(expr);
+}

lib/sensors.h

@@ -34,6 +34,14 @@ typedef struct sensors_chip_name {
   int addr;
 } sensors_chip_name;
 
+/* (Re)load the configuration file and the detected chips list. */
+extern int sensors_init(void);
+
+/* Strictly optional clean-up function: You can't access anything after
+   this, until the next sensors_init() call! */
+extern void sensors_cleanup(void);
+
+
 /* Parse a chip name to the internal representation. Return 0 on succes, <0
    on error. */
 extern int sensors_parse_chip_name(const char *orig_name,