support png output, buffered file writing

[dcpu16] / dcpu16.c

diff --git a/dcpu16.c b/dcpu16.c
index b88cf0583a73148840a0b645e843578ded23fa03..23ef53a41747da7aadb9a51baec085033d5e1bab 100644 (file)
--- a/dcpu16.c
+++ b/dcpu16.c
@@ -26,6 +26,8 @@
  *  TODO
  *    change api to print into buffers rather than stdio
  *    refactor opcode functiontables into switch statements
+ *    let callbacks determine whether to override events, or just observe
+ *    sort init callbacks by base addr, to call in-order
  */
 
 static const char * const src_id_ = "$Id$";
@@ -87,7 +89,7 @@ void dcpu16_trace_cb_set(void (*fn)(char *fmt, ...)) {
  *  invokes callbacks for specified event
  */
 static inline
-void acct_event_(struct dcpu16 *vm, dcpu16_acct_event_ ev, DCPU16_WORD addr) {
+void acct_event_(struct dcpu16 *vm, dcpu16_acct_event ev, DCPU16_WORD addr) {
     struct dcpu16_acct_cb *cb = vm->cb_table_;
     size_t i;
 
@@ -691,6 +693,8 @@ void dcpu16_step(struct dcpu16 *d) {
 
     if (!d) return;
 
+    acct_event_(d, DCPU16_ACCT_EV_CYCLE, d->pc);
+
     /*
         PC is advanced while decoding the operands by the opcode functions.
         Things like this could be organized a little better..
@@ -763,7 +767,7 @@ void dcpu16_dump_ram(struct dcpu16 *d, DCPU16_WORD start, DCPU16_WORD end) {
  *  Register callback fn to be triggered whenever event matching any events
  *  in bitwise mask occur.
  */
-int dcpu16_acct_add(struct dcpu16 *vm, dcpu16_acct_event_ mask, void (*fn)(struct dcpu16 *, dcpu16_acct_event_, DCPU16_WORD, void *), void *data) {
+int dcpu16_acct_add(struct dcpu16 *vm, dcpu16_acct_event mask, dcpu16_ev_cb_t *fn, void *data) {
     struct dcpu16_acct_cb cb;
 
     cb.mask = mask;
@@ -788,12 +792,20 @@ int dcpu16_acct_add(struct dcpu16 *vm, dcpu16_acct_event_ mask, void (*fn)(struc
 }
 
 /*  dcpu16_reset
- *  resets a dcpu16 instance to initial state
+ *  signals cpu to reset, clearing runstate and ram, then reload any init callbacks
  */
 void dcpu16_reset(struct dcpu16 *d) {
     if (!d) return;
 
-    memset(d, 0, sizeof *d);
+    d->cycle = 0;
+    memset(d->reg, 0, sizeof d->reg);
+    d->pc = 0;
+    d->sp = 0;
+    d->o = 0;
+    d->skip_ = 0;
+    memset(d->ram, 0, sizeof d->ram);
+
+    acct_event_(d, DCPU16_ACCT_EV_RESET, 0);
 }
 
 /*  dcpu16_new