/****************************************************************************
- * RRDtool 1.2.11 Copyright by Tobi Oetiker, 1997-2005
+ * RRDtool 1.2.23 Copyright by Tobi Oetiker, 1997-2007
****************************************************************************
* rrd_rpncalc.c RPN calculator functions
****************************************************************************/
add_op(OP_TREND,TREND)
add_op(OP_RAD2DEG,RAD2DEG)
add_op(OP_DEG2RAD,DEG2RAD)
+ add_op(OP_AVG,AVG)
+ add_op(OP_ABS,ABS)
#undef add_op
}
(*str)[offset] = '\0';
return 0;
}
-void parseCDEF_DS(char *def,rrd_t *rrd, int ds_idx)
+void parseCDEF_DS(const char *def,rrd_t *rrd, int ds_idx)
{
rpnp_t *rpnp = NULL;
rpn_cdefds_t *rpnc = NULL;
rpnp = rpn_parse((void*) rrd, def, &lookup_DS);
if (rpnp == NULL) {
- rrd_set_error("failed to parse computed data source %s", def);
+ rrd_set_error("failed to parse computed data source");
return;
}
/* Check for OP nodes not permitted in COMPUTE DS.
char *expr;
long steps=-1;
rpnp_t *rpnp;
- char vname[30];
+ char vname[MAX_VNAME_LEN+10];
rpnp=NULL;
expr=(char *)expr_const;
}
#define match_op(VV,VVV) \
- else if (strncmp(expr, #VVV, strlen(#VVV))==0){ \
- rpnp[steps].op = VV; \
- expr+=strlen(#VVV); \
+ else if (strncmp(expr, #VVV, strlen(#VVV))==0 && ( expr[strlen(#VVV)] == ',' || expr[strlen(#VVV)] == '\0' )){ \
+ rpnp[steps].op = VV; \
+ expr+=strlen(#VVV); \
}
match_op(OP_TREND,TREND)
match_op(OP_RAD2DEG,RAD2DEG)
match_op(OP_DEG2RAD,DEG2RAD)
+ match_op(OP_AVG,AVG)
+ match_op(OP_ABS,ABS)
#undef match_op
rpnstack -> s[--stptr] = DNAN;
}
break;
+ case OP_AVG:
+ stackunderflow(0);
+ {
+ int i=(int)rpnstack -> s[stptr--];
+ double sum=0;
+ int count=0;
+ stackunderflow(i-1);
+ while(i>0) {
+ double val=rpnstack -> s[stptr--];
+ i--;
+ if (isnan(val)) { continue; }
+ count++;
+ sum+=val;
+ }
+ /* now push the result back on stack */
+ if (count>0) {
+ rpnstack -> s[++stptr]=sum/count;
+ } else {
+ rpnstack -> s[++stptr]=DNAN;
+ }
+ }
+ break;
+ case OP_ABS:
+ stackunderflow(0);
+ rpnstack -> s[stptr] = fabs(rpnstack -> s[stptr]);
+ break;
case OP_END:
break;
}