Im sogenannten NCSA extended/combined log format finden sich folgende Informationen:

1. %h...Remote host
2. %l...Remote logname (from identd, if supplied)
3. %u...Remote user (from auth, may be bogus if returnstatus (%s) is 401)
4. %t...Time, in common log format time format (standard english format)
5. %r...First line of request
6. %>s...Status of the last request (%s would be the original request, which could be "follow" or what ever)
   
7. %\{Referer\}i...Inserts the Referer-String from the user's browser (without the backslashes)
8. %\{User-agent\}i...Inserts the User's Browsername (without the backslashes)

...somit so ziemlich alles, was von Interesse sein könnte.

Folgender Eintrag in die httpd.conf aktiviert dieses Format:

     # CustomLog with format nickname

     LogFormat "%h %l %u %t \"%r\" %>s %b \"%\{Referer\}i\" \"%i\{User-agent\}\"" ncsa

     CustomLog logs/access_log ncsa

Ich habe für jeden Knoten eine eigene Behandlungsroutine geschrieben, die Folgende ist beispielsweise für die Behandlung von "add"-Befehlen zuständig. Das gezeigte Prinzip sollte aber für so ziemlich alle binären Operationen anwendbar sein.

83 /*              arithmetics
84 */
85 
86 
87 node_add(treenodep a, treenodep b, treenodep dest) {
88 
89         if((a->regnr!=-1) && (b->regnr!=-1)) {
90 
91                 if(is_work_reg(a->regnr))
92                         dest->regnr=a->regnr;
93                 else
94                 if(is_work_reg(b->regnr))
95                         dest->regnr=b->regnr;
96                 else
97                         dest->regnr=alloc_register();
98 
99                 print_add(a->regnr, b->regnr, dest->regnr);
100 
101         } else
102         if(a->regnr!=-1) {
103 
104                 if(is_work_reg(a->regnr)) {
105 
106                         dest->regnr=a->regnr;
107                         print_add_const(a->regnr, b->num, a->regnr);
108 
109                 } else {
110 
111                         dest->regnr=alloc_register();
112                         print_add_const(a->regnr, b->num, dest->regnr);
113                 }
114 
115         } else
116         if(b->regnr!=-1) {
117 
118 
119                 if(is_work_reg(b->regnr)) {
120 
121                         dest->regnr=b->regnr;
122                         print_add_const(b->regnr, a->num, b->regnr);
123 
124                 } else {
125 
126                         dest->regnr=alloc_register();
127                         print_add_const(b->regnr, a->num, dest->regnr);
128                 }
129 
130         } else {
131 
132                 /* herzlichen Dank an Peter / Informatik-Forum
133                    für diese GENIALE Idee! :-) */
134 
135                 if(((a->num+b->num)>-254) &&
136                    ((a->num+b->num)< 255)) {
137 
138                         dest->num=a->num+b->num;
139                         dest->regnr=-1;
140 
141                 } else {
142 
143                         dest->regnr=alloc_register();
144                         print_store_const(a->num, dest->regnr);
145                         print_add_const(dest->regnr, b->num, dest->regnr);
146 
147                 }
148 
149         }
150 }