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DIRECTOR: Factored out XPFloat reading

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This commit is contained in:
Eugene Sandulenko 2024-05-14 18:26:02 +02:00
parent a9e5a2fa01
commit 126cba16cf
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GPG Key ID: 014D387312D34F08
3 changed files with 15 additions and 5 deletions
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6
engines/director/lingo/lingo-bytecode.cpp
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@ -22,7 +22,6 @@
#include "common/config-manager.h"
#include "common/file.h"
#include "common/substream.h"
#include "common/xpfloat.h"
#include "director/director.h"
#include "director/cast.h"
@ -1242,10 +1241,7 @@ ScriptContext *LingoCompiler::compileLingoV4(Common::SeekableReadStreamEndian &s
// Floats are stored as an "80 bit IEEE Standard 754 floating
// point number (Standard Apple Numeric Environment [SANE] data type
// Extended).
uint16 signAndExponent = READ_BE_UINT16(&constsStore[pointer]);
uint64 mantissa = READ_BE_UINT64(&constsStore[pointer+2]);
constant.u.f = Common::XPFloat(signAndExponent, mantissa).toDouble(Common::XPFloat::kSemanticsSANE);
constant.u.f = readAppleFloat80(&constsStore[pointer]);
} else if (length == 8) {
constant.u.f = READ_BE_FLOAT64(&constsStore[pointer]);
} else {

12
engines/director/util.cpp
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@ -26,6 +26,7 @@
#include "common/punycode.h"
#include "common/str-array.h"
#include "common/tokenizer.h"
#include "common/xpfloat.h"
#include "common/compression/deflate.h"
#include "director/types.h"
@ -1650,4 +1651,15 @@ void DirectorEngine::delayMillis(uint32 delay) {
_system->delayMillis(delay);
}
double readAppleFloat80(byte *ptr) {
// Floats in an "80 bit IEEE Standard 754 floating
// point number (Standard Apple Numeric Environment [SANE] data type
// Extended).
uint16 signAndExponent = READ_BE_UINT16(&ptr[0]);
uint64 mantissa = READ_BE_UINT64(&ptr[2]);
return Common::XPFloat(signAndExponent, mantissa).toDouble(Common::XPFloat::kSemanticsSANE);
}
} // End of namespace Director

2
engines/director/util.h
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@ -70,6 +70,8 @@ Common::Path dumpFactoryName(const char *prefix, const char *name, const char *e
bool isButtonSprite(SpriteType spriteType);
double readAppleFloat80(byte *ptr);
class RandomState {
public:
uint32 _seed;