- break;
- case OP_PREV:
- if ((output_idx-1) <= 0) {
- rpnstack -> s[++stptr] = DNAN;
- } else {
- rpnstack -> s[++stptr] = output[output_idx-1];
- }
- break;
- case OP_UNKN:
- rpnstack -> s[++stptr] = DNAN;
- break;
- case OP_INF:
- rpnstack -> s[++stptr] = DINF;
- break;
- case OP_NEGINF:
- rpnstack -> s[++stptr] = -DINF;
- break;
- case OP_NOW:
- rpnstack -> s[++stptr] = (double)time(NULL);
- break;
- case OP_TIME:
- /* HACK: this relies on the data_idx being the time,
- * which the within-function scope is unaware of */
- rpnstack -> s[++stptr] = (double) data_idx;
- break;
- case OP_LTIME:
- rpnstack -> s[++stptr] = (double) tzoffset(data_idx) + (double)data_idx;
- break;
- case OP_ADD:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr-1]
- + rpnstack -> s[stptr];
- stptr--;
- break;
- case OP_SUB:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr-1] - rpnstack -> s[stptr];
- stptr--;
- break;
- case OP_MUL:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr-1] = (rpnstack -> s[stptr-1]) * (rpnstack -> s[stptr]);
- stptr--;
- break;
- case OP_DIV:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr-1] / rpnstack -> s[stptr];
- stptr--;
- break;
- case OP_MOD:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr-1] = fmod(rpnstack -> s[stptr-1],rpnstack -> s[stptr]);
- stptr--;
- break;
- case OP_SIN:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr] = sin(rpnstack -> s[stptr]);
- break;
- case OP_COS:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr] = cos(rpnstack -> s[stptr]);
- break;
- case OP_CEIL:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr] = ceil(rpnstack -> s[stptr]);
- break;
- case OP_FLOOR:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr] = floor(rpnstack -> s[stptr]);
- break;
- case OP_LOG:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr] = log(rpnstack -> s[stptr]);
- break;
- case OP_DUP:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr+1] = rpnstack -> s[stptr];
- stptr++;
- break;
- case OP_POP:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- stptr--;
- break;
- case OP_EXC:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- } else {
- double dummy;
- dummy = rpnstack -> s[stptr] ;
- rpnstack -> s[stptr] = rpnstack -> s[stptr-1];
- rpnstack -> s[stptr-1] = dummy;
- }
- break;
- case OP_EXP:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack -> s[stptr] = exp(rpnstack -> s[stptr]);
- break;
- case OP_LT:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- if (isnan(rpnstack -> s[stptr-1]))
- ;
- else if (isnan(rpnstack -> s[stptr]))
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr];
- else
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr-1] < rpnstack -> s[stptr] ? 1.0 : 0.0;
- stptr--;
- break;
- case OP_LE:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- if (isnan(rpnstack -> s[stptr-1]))
- ;
- else if (isnan(rpnstack -> s[stptr]))
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr];
- else
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr-1] <= rpnstack -> s[stptr] ? 1.0 : 0.0;
- stptr--;
- break;
- case OP_GT:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- if (isnan(rpnstack -> s[stptr-1]))
- ;
- else if (isnan(rpnstack -> s[stptr]))
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr];
- else
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr-1] > rpnstack -> s[stptr] ? 1.0 : 0.0;
- stptr--;
- break;
- case OP_GE:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- if (isnan(rpnstack -> s[stptr-1]))
- ;
- else if (isnan(rpnstack -> s[stptr]))
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr];
- else
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr-1] >= rpnstack -> s[stptr] ? 1.0 : 0.0;
- stptr--;
- break;
- case OP_EQ:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- if (isnan(rpnstack -> s[stptr-1]))
- ;
- else if (isnan(rpnstack -> s[stptr]))
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr];
- else
- rpnstack -> s[stptr-1] = rpnstack -> s[stptr-1] == rpnstack -> s[stptr] ? 1.0 : 0.0;
- stptr--;
- break;
- case OP_IF:
- if(stptr<2){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- rpnstack->s[stptr-2] = rpnstack->s[stptr-2] != 0.0 ? rpnstack->s[stptr-1] : rpnstack->s[stptr];
- stptr--;
- stptr--;
- break;
- case OP_MIN:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- if (isnan(rpnstack->s[stptr-1]))
- ;
- else if (isnan(rpnstack->s[stptr]))
- rpnstack->s[stptr-1] = rpnstack->s[stptr];
- else if (rpnstack->s[stptr-1] > rpnstack->s[stptr])
- rpnstack->s[stptr-1] = rpnstack->s[stptr];
- stptr--;
- break;
- case OP_MAX:
- if(stptr<1){
- rrd_set_error("RPN stack underflow");
- return -1;
- }
- if (isnan(rpnstack->s[stptr-1]))
- ;
- else if (isnan(rpnstack->s[stptr]))
- rpnstack->s[stptr-1] = rpnstack->s[stptr];
- else if (rpnstack->s[stptr-1] < rpnstack->s[stptr])
- rpnstack->s[stptr-1] = rpnstack->s[stptr];
- stptr--;
- break;
- case OP_LIMIT:
- if(stptr<2){
- rrd_set_error("RPN stack underflow");
- free(rpnstack->s);
- return -1;
- }
- if (isnan(rpnstack->s[stptr-2]))
- ;
- else if (isnan(rpnstack->s[stptr-1]))
- rpnstack->s[stptr-2] = rpnstack->s[stptr-1];
- else if (isnan(rpnstack->s[stptr]))
- rpnstack->s[stptr-2] = rpnstack->s[stptr];
- else if (rpnstack->s[stptr-2] < rpnstack->s[stptr-1])
- rpnstack->s[stptr-2] = DNAN;
- else if (rpnstack->s[stptr-2] > rpnstack->s[stptr])
- rpnstack->s[stptr-2] = DNAN;
- stptr-=2;
- break;
- case OP_UN:
- if(stptr<0){
- rrd_set_error("RPN stack underflow");
- return -1;