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Restrict octal escape sequences in character constants and strings to at most three octal digits.

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This is what is required by the C standards.

This partially reverts a change in ORCA/C 2.1.0, which should only have been applied to hexadecimal escape sequences.
This commit is contained in:
Stephen Heumann 2017-10-01 21:15:21 -05:00
parent 75bb522025
commit a69fc2be59
1 changed files with 8 additions and 2 deletions
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10
Scanner.pas
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@ -3236,6 +3236,7 @@ var
label 1;
var
cnt: 0..3; {for counting octal escape sequences}
dig: 0..15; {value of a hex digit}
skipChar: boolean; {get next char when done?}
val: 0..4095; {hex escape code value (scaled to 0..255)}
@ -3248,8 +3249,10 @@ var
case lch of
'0','1','2','3','4','5','6','7': begin
val := 0;
while lch in ['0'..'7'] do begin
cnt := 0;
while (cnt < 3) and (lch in ['0'..'7']) do begin
val := (val << 3) | (ord(lch) & 7);
cnt := cnt+1;
NextCh;
end; {while}
EscapeCh := val & $FF;
@ -3637,6 +3640,7 @@ var
label 1;
var
cnt: 0..3; {for counting octal escape sequences}
dig: 0..15; {value of a hex digit}
skipChar: boolean; {get next char when done?}
val: 0..4095; {hex escape code value (scaled to 0..255)}
@ -3649,8 +3653,10 @@ var
case ch of
'0','1','2','3','4','5','6','7': begin
val := 0;
while ch in ['0'..'7'] do begin
cnt := 0;
while (cnt < 3) and (ch in ['0'..'7']) do begin
val := (val << 3) | (ord(ch) & 7);
cnt := cnt+1;
NextCh;
end; {while}
EscapeCh := val & $FF;