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Add most of the infrastructure to support 64-bit decimal constants.

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Right now, decimal constants can have long long types based on their suffix, but they are still limited to a maximum value of 2^32-1.

This also implements the C99 change where decimal constants without a u suffix always have signed types. Thus, decimal constants of 2^31 and up now have type long long, even if their values could be represented in the type unsigned long.
This commit is contained in:
Stephen Heumann 2021-02-04 00:22:56 -06:00
parent 058c0565c6
commit c37fae0f3b
1 changed files with 19 additions and 6 deletions
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25
Scanner.pas
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@ -3351,22 +3351,35 @@ else if numString[1] <> '0' then begin {convert a decimal integer}
or (not unsigned and (stringIndex = 5) and (numString > '32767'))
or (unsigned and (stringIndex = 5) and (numString > '65535')) then
isLong := true;
if (stringIndex > 10) or
if (stringIndex > 10)
or (not unsigned and (stringIndex = 10) and (numString > '2147483647'))
or (unsigned and (stringIndex = 10) and (numString > '4294967295')) then
isLongLong := true;
if (stringIndex > 10) or {TODO increase limits}
((stringIndex = 10) and (numString > '4294967295')) then begin
numString := '0';
if flagOverflows then
FlagError(6);
end; {if}
if isLong then begin
if isLongLong then begin
token.class := longlongConstant;
token.qval.hi := 0;
token.qval.lo := Convertsl(numString); {TODO support full 64-bit range}
if unsigned then
token.kind := ulonglongConst
else begin
token.kind := longlongConst;
if token.qval.hi < 0 then
FlagError(6);
end; {else}
end {if}
else if isLong then begin
token.class := longConstant;
token.lval := Convertsl(numString);
if unsigned then
token.kind := ulongConst
else begin
else
token.kind := longConst;
if token.lval < 0 then
token.kind := ulongConst;
end; {else}
end {if}
else begin
if unsigned then