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Make encode/decode more testable with return codes
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8009a33bd4
commit
1245ddec55
@ -34,6 +34,10 @@ apple2_dec_dos(vm_segment *dest, vm_segment *src)
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{
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int i, doff, tracklen;
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if (dest == NULL || src == NULL) {
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return OK;
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}
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for (i = 0, doff = 0; i < ENC_NUM_TRACKS; i++) {
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tracklen = apple2_dec_track(dest, src, doff, i);
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@ -56,6 +60,15 @@ apple2_dec_dos(vm_segment *dest, vm_segment *src)
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int
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apple2_dec_nib(vm_segment *dest, vm_segment *src)
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{
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// It's "ok" if you pass in NULL params; the only time you ever
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// would is in testing, because we presume you are testing some
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// other aspect of the code there. (Good example: when your test is
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// not actually testing apple2_dec_nib, but something that calls
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// it.)
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if (dest == NULL || src == NULL) {
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return OK;
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}
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return vm_segment_copy(dest, src, 0, 0, src->size);
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}
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@ -25,6 +25,10 @@ apple2_enc_dos(vm_segment *src)
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vm_segment *dest;
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int i, doff = 0;
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if (src == NULL) {
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return NULL;
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}
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// Use the nibbilized size for a 140k image file
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dest = vm_segment_create(_140K_NIB_);
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@ -65,6 +69,11 @@ apple2_enc_nib(vm_segment *src)
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{
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vm_segment *dest;
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// No src segment, no return data.
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if (src == NULL) {
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return NULL;
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}
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dest = vm_segment_create(src->size);
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vm_segment_copy(dest, src, 0, 0, src->size);
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