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(svn r16334) -Codechange: use NeedLength enum

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smatz 2009-05-17 11:43:51 +00:00
parent 88201ccd5c
commit 4876e346d5
1 changed files with 50 additions and 43 deletions
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93
src/saveload/saveload.cpp
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@ -58,10 +58,16 @@ enum SaveLoadAction {
SLA_SAVE, ///< saving
};
enum NeedLength {
NL_NONE = 0, ///< not working in NeedLength mode
NL_WANTLENGTH = 1, ///< writing length and data
NL_CALCLENGTH = 2, ///< need to calculate the length
};
/** The saveload struct, containing reader-writer functions, bufffer, version, etc. */
struct SaveLoadParams {
SaveLoadAction action; ///< are we doing a save or a load atm.
byte need_length; ///< ???
NeedLength need_length; ///< working in NeedLength (Autolength) mode?
byte block_mode; ///< ???
bool error; ///< did an error occur or not
@ -92,9 +98,6 @@ struct SaveLoadParams {
static SaveLoadParams _sl;
enum NeedLengthValues {NL_NONE = 0, NL_WANTLENGTH = 1, NL_CALCLENGTH = 2};
/** Error handler, calls longjmp to simulate an exception.
* @todo this was used to have a central place to handle errors, but it is
* pretty ugly, and seriously interferes with any multithreaded approaches */
@ -399,31 +402,35 @@ void SlSetLength(size_t length)
assert(_sl.action == SLA_SAVE);
switch (_sl.need_length) {
case NL_WANTLENGTH:
_sl.need_length = NL_NONE;
switch (_sl.block_mode) {
case CH_RIFF:
/* Ugly encoding of >16M RIFF chunks
* The lower 24 bits are normal
* The uppermost 4 bits are bits 24:27 */
assert(length < (1 << 28));
SlWriteUint32((uint32)((length & 0xFFFFFF) | ((length >> 24) << 28)));
case NL_WANTLENGTH:
_sl.need_length = NL_NONE;
switch (_sl.block_mode) {
case CH_RIFF:
/* Ugly encoding of >16M RIFF chunks
* The lower 24 bits are normal
* The uppermost 4 bits are bits 24:27 */
assert(length < (1 << 28));
SlWriteUint32((uint32)((length & 0xFFFFFF) | ((length >> 24) << 28)));
break;
case CH_ARRAY:
assert(_sl.last_array_index <= _sl.array_index);
while (++_sl.last_array_index <= _sl.array_index)
SlWriteArrayLength(1);
SlWriteArrayLength(length + 1);
break;
case CH_SPARSE_ARRAY:
SlWriteArrayLength(length + 1 + SlGetArrayLength(_sl.array_index)); // Also include length of sparse index.
SlWriteSparseIndex(_sl.array_index);
break;
default: NOT_REACHED();
}
break;
case CH_ARRAY:
assert(_sl.last_array_index <= _sl.array_index);
while (++_sl.last_array_index <= _sl.array_index)
SlWriteArrayLength(1);
SlWriteArrayLength(length + 1);
break;
case CH_SPARSE_ARRAY:
SlWriteArrayLength(length + 1 + SlGetArrayLength(_sl.array_index)); // Also include length of sparse index.
SlWriteSparseIndex(_sl.array_index);
case NL_CALCLENGTH:
_sl.obj_len += (int)length;
break;
default: NOT_REACHED();
} break;
case NL_CALCLENGTH:
_sl.obj_len += (int)length;
break;
}
}
@ -950,7 +957,7 @@ void SlAutolength(AutolengthProc *proc, void *arg)
{
size_t offs;
assert(_sl.action == SL_SAVE);
assert(_sl.action == SLA_SAVE);
/* Tell it to calculate the length */
_sl.need_length = NL_CALCLENGTH;
@ -1033,22 +1040,22 @@ static void SlSaveChunk(const ChunkHandler *ch)
_sl.block_mode = ch->flags & CH_TYPE_MASK;
switch (ch->flags & CH_TYPE_MASK) {
case CH_RIFF:
_sl.need_length = NL_WANTLENGTH;
proc();
break;
case CH_ARRAY:
_sl.last_array_index = 0;
SlWriteByte(CH_ARRAY);
proc();
SlWriteArrayLength(0); // Terminate arrays
break;
case CH_SPARSE_ARRAY:
SlWriteByte(CH_SPARSE_ARRAY);
proc();
SlWriteArrayLength(0); // Terminate arrays
break;
default: NOT_REACHED();
case CH_RIFF:
_sl.need_length = NL_WANTLENGTH;
proc();
break;
case CH_ARRAY:
_sl.last_array_index = 0;
SlWriteByte(CH_ARRAY);
proc();
SlWriteArrayLength(0); // Terminate arrays
break;
case CH_SPARSE_ARRAY:
SlWriteByte(CH_SPARSE_ARRAY);
proc();
SlWriteArrayLength(0); // Terminate arrays
break;
default: NOT_REACHED();
}
}