From 3d4765569e009b6bb02add493d5abfe727709ec5 Mon Sep 17 00:00:00 2001
From: reinelt <>
Date: Mon, 12 Jan 2004 03:51:01 +0000
Subject: [lcd4linux @ 2004-01-12 03:51:01 by reinelt] evaluating the
 'Variables' section in the config file

---
 evaluator.c | 20 +++++++++++++++-----
 evaluator.h |  7 ++++++-
 expr.c      | 20 +++++++++++++-------
 layout.c    |  6 +++++-
 lcd4linux.c |  6 +++++-
 5 files changed, 44 insertions(+), 15 deletions(-)

diff --git a/evaluator.c b/evaluator.c
index 2b84dd6..ce0623d 100644
--- a/evaluator.c
+++ b/evaluator.c
@@ -1,4 +1,4 @@
-/* $Id: evaluator.c,v 1.7 2004/01/07 10:15:41 reinelt Exp $
+/* $Id: evaluator.c,v 1.8 2004/01/12 03:51:01 reinelt Exp $
  *
  * expression evaluation
  *
@@ -10,6 +10,9 @@
  * FIXME: GPL or not GPL????
  *
  * $Log: evaluator.c,v $
+ * Revision 1.8  2004/01/12 03:51:01  reinelt
+ * evaluating the 'Variables' section in the config file
+ *
  * Revision 1.7  2004/01/07 10:15:41  reinelt
  * small glitch in evaluator fixed
  * made config table sorted and access with bsearch(),
@@ -77,6 +80,13 @@
 /* 
  * exported functions:
  *
+ * void DelResult (RESULT *result)
+ *   sets a result to none
+ *   frees a probably allocated memory
+ *
+ * int SetVariable (char *name, RESULT *value)
+ *   adds a generic variable to the evaluator
+ *
  * int AddNumericVariable(char *name, double value)
  *   adds a numerical variable to the evaluator
  *
@@ -168,7 +178,7 @@ char* ErrMsg[] = {
 
 
 
-static void DelResult (RESULT *result)
+void DelResult (RESULT *result)
 {
   result->type=0;
   result->number=0.0;
@@ -348,7 +358,7 @@ static int GetVariable (char *name, RESULT *value)
 }
 
 
-static int SetVariable (char *name, RESULT *value)
+int SetVariable (char *name, RESULT *value)
 {
   VARIABLE *V;
 
@@ -819,7 +829,7 @@ int Eval (char* expression, RESULT *result)
   int i, err;
   
   if ((err=setjmp(jb))) {
-    error ("Error: %s in expression <%s>", ErrMsg[err], expression);
+    error ("Evaluator: %s in expression <%s>", ErrMsg[err], expression);
     return -1;
   }
   
@@ -830,7 +840,7 @@ int Eval (char* expression, RESULT *result)
     // sanity check: two functions with the same name?
     for (i=1; i<nFunction; i++) {
       if (strcmp(Function[i].name, Function[i-1].name)==0) {
-	error ("internal error: Function '%s' defined twice!", Function[i].name);
+	error ("Evaluator: internal error: Function '%s' defined twice!", Function[i].name);
       }
     }
   }
diff --git a/evaluator.h b/evaluator.h
index f15ee32..9ace102 100644
--- a/evaluator.h
+++ b/evaluator.h
@@ -1,4 +1,4 @@
-/* $Id: evaluator.h,v 1.2 2003/10/11 06:01:53 reinelt Exp $
+/* $Id: evaluator.h,v 1.3 2004/01/12 03:51:01 reinelt Exp $
  *
  * expression evaluation
  *
@@ -10,6 +10,9 @@
  * FIXME: GPL or not GPL????
  *
  * $Log: evaluator.h,v $
+ * Revision 1.3  2004/01/12 03:51:01  reinelt
+ * evaluating the 'Variables' section in the config file
+ *
  * Revision 1.2  2003/10/11 06:01:53  reinelt
  *
  * renamed expression.{c,h} to client.{c,h}
@@ -84,6 +87,8 @@ typedef struct {
 #define E_EMPTY   8 /* Empty expression */
 
 
+void DelResult         (RESULT *result);
+int SetVariable        (char *name, RESULT *value);
 int AddNumericVariable (char *name, double value);
 int AddStringVariable  (char *name, char *value);
 int AddFunction        (char *name, int args, void (*func)());
diff --git a/expr.c b/expr.c
index 2464a99..1b1c5b7 100644
--- a/expr.c
+++ b/expr.c
@@ -1,4 +1,4 @@
-/* $Id: expr.c,v 1.2 2004/01/09 04:16:06 reinelt Exp $
+/* $Id: expr.c,v 1.3 2004/01/12 03:51:01 reinelt Exp $
  *
  * expr ('y*') functions
  * This is only a workaround to make the Evaluator usable until
@@ -24,6 +24,9 @@
  *
  *
  * $Log: expr.c,v $
+ * Revision 1.3  2004/01/12 03:51:01  reinelt
+ * evaluating the 'Variables' section in the config file
+ *
  * Revision 1.2  2004/01/09 04:16:06  reinelt
  * added 'section' argument to cfg_get(), but NULLed it on all calls by now.
  *
@@ -45,9 +48,9 @@
 #include "cfg.h"
 
 
-int Expr(int index, char result[EXPR_TXT_LEN], double *val)
+int Expr(int index, char string[EXPR_TXT_LEN], double *val)
 {
-  RESULT Result = {0, 0.0, NULL};
+  RESULT result = {0, 0.0, NULL};
   static int errs[EXPRS+1];
   char *expression;
   char yn[4];
@@ -67,14 +70,14 @@ int Expr(int index, char result[EXPR_TXT_LEN], double *val)
     return -1;
   }
 
-  Eval(expression, &Result);
-  strcpy(result, R2S(&Result));
+  Eval(expression, &result);
+  strcpy(string, R2S(&result));
   
   debug("%s: <%s> = '%s'",yn, expression, result);
 
-  if (isdigit(*result)) {
+  if (isdigit(*string)) {
     double max, min;
-    *val = atof(result);
+    *val = atof(string);
     sprintf(yn, "Max_y%d", index);
     max = atof(cfg_get(NULL, yn, "100"));
     sprintf(yn, "Min_y%d", index);
@@ -82,6 +85,9 @@ int Expr(int index, char result[EXPR_TXT_LEN], double *val)
     if (max != min)
       *val = (*val - min)/(max - min);
   }
+
+  DelResult (&result);
+
   return 0;
 }
 
diff --git a/layout.c b/layout.c
index 13d05f9..5ea84ca 100644
--- a/layout.c
+++ b/layout.c
@@ -1,4 +1,4 @@
-/* $Id: layout.c,v 1.3 2004/01/11 18:26:02 reinelt Exp $
+/* $Id: layout.c,v 1.4 2004/01/12 03:51:01 reinelt Exp $
  *
  * new layouter framework
  *
@@ -23,6 +23,9 @@
  *
  *
  * $Log: layout.c,v $
+ * Revision 1.4  2004/01/12 03:51:01  reinelt
+ * evaluating the 'Variables' section in the config file
+ *
  * Revision 1.3  2004/01/11 18:26:02  reinelt
  * further widget and layout processing
  *
@@ -54,6 +57,7 @@
 
 #include "debug.h"
 #include "cfg.h"
+#include "widget.h"
 #include "layout.h"
 
 
diff --git a/lcd4linux.c b/lcd4linux.c
index 255d94a..a69e546 100644
--- a/lcd4linux.c
+++ b/lcd4linux.c
@@ -1,4 +1,4 @@
-/* $Id: lcd4linux.c,v 1.58 2004/01/10 20:22:33 reinelt Exp $
+/* $Id: lcd4linux.c,v 1.59 2004/01/12 03:51:01 reinelt Exp $
  *
  * LCD4Linux
  *
@@ -22,6 +22,9 @@
  *
  *
  * $Log: lcd4linux.c,v $
+ * Revision 1.59  2004/01/12 03:51:01  reinelt
+ * evaluating the 'Variables' section in the config file
+ *
  * Revision 1.58  2004/01/10 20:22:33  reinelt
  * added new function 'cfg_list()' (not finished yet)
  * added layout.c (will replace processor.c someday)
@@ -564,6 +567,7 @@ int main (int argc, char *argv[])
 	} else if (result.type==R_STRING) {
 	  printf ("'%s'\n", R2S(&result));
 	}
+	DelResult (&result);
       }
       printf("eval> ");
     }
-- 
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