fixed processing of custom fonts René GARCIA <rene@margar.fr>

[rrdtool.git] / src / rrd_rpncalc.c

diff --git a/src/rrd_rpncalc.c b/src/rrd_rpncalc.c
index 989a108..5bb5e40 100644 (file)
--- a/src/rrd_rpncalc.c
+++ b/src/rrd_rpncalc.c
@@ -1,12 +1,12 @@
 /****************************************************************************
- * RRDtool 1.2.23  Copyright by Tobi Oetiker, 1997-2007
+ * RRDtool 1.3.2  Copyright by Tobi Oetiker, 1997-2008
  ****************************************************************************
  * rrd_rpncalc.c  RPN calculator functions
  ****************************************************************************/
 
 #include "rrd_tool.h"
 #include "rrd_rpncalc.h"
-#include "rrd_graph.h"
+// #include "rrd_graph.h"
 #include <limits.h>
 #include <locale.h>
 
@@ -178,6 +178,7 @@ void rpn_compact2str(
             add_op(OP_DEG2RAD, DEG2RAD)
             add_op(OP_AVG, AVG)
             add_op(OP_ABS, ABS)
+            add_op(OP_ADDNAN, ADDNAN)
 #undef add_op
     }
     (*str)[offset] = '\0';
@@ -374,6 +375,7 @@ rpnp_t   *rpn_parse(
             match_op(OP_DEG2RAD, DEG2RAD)
             match_op(OP_AVG, AVG)
             match_op(OP_ABS, ABS)
+            match_op(OP_ADDNAN, ADDNAN)
 #undef match_op
             else if ((sscanf(expr, DEF_NAM_FMT "%n", vname, &pos) == 1)
                      && ((rpnp[steps].ptr = (*lookup) (key_hash, vname)) !=
@@ -543,6 +545,20 @@ short rpn_calc(
                 + rpnstack->s[stptr];
             stptr--;
             break;
+        case OP_ADDNAN:
+            stackunderflow(1);
+            if (isnan(rpnstack->s[stptr - 1])) {
+                rpnstack->s[stptr - 1] = rpnstack->s[stptr];
+            } else if (isnan(rpnstack->s[stptr])) {
+                /* NOOP */
+                /* rpnstack->s[stptr - 1] = rpnstack->s[stptr - 1]; */
+            } else {
+                rpnstack->s[stptr - 1] = rpnstack->s[stptr - 1]
+                    + rpnstack->s[stptr];
+            }
+
+            stptr--;
+            break;
         case OP_SUB:
             stackunderflow(1);
             rpnstack->s[stptr - 1] = rpnstack->s[stptr - 1]
@@ -690,8 +706,10 @@ short rpn_calc(
             break;
         case OP_IF:
             stackunderflow(2);
-            rpnstack->s[stptr - 2] = rpnstack->s[stptr - 2] != 0.0 ?
-                rpnstack->s[stptr - 1] : rpnstack->s[stptr];
+            rpnstack->s[stptr - 2] = (isnan(rpnstack->s[stptr - 2])
+                                      || rpnstack->s[stptr - 2] ==
+                                      0.0) ? rpnstack->s[stptr] : rpnstack->
+                s[stptr - 1];
             stptr--;
             stptr--;
             break;