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4062-core_scan-Stricten-tests-for-integers.patch
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File 4062-core_scan-Stricten-tests-for-integers.patch of Package erlang
From eaf1183fe7d81caacd80f04781a54cc1f7bbc483 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= <bjorn@erlang.org> Date: Thu, 30 Jun 2022 05:17:07 +0200 Subject: [PATCH 2/6] core_scan: Stricten tests for integers --- lib/compiler/src/core_scan.erl | 45 +++++++++++++++++++++++----------- 1 file changed, 31 insertions(+), 14 deletions(-) diff --git a/lib/compiler/src/core_scan.erl b/lib/compiler/src/core_scan.erl index a50a2ffa8d..a7f06b8da4 100644 --- a/lib/compiler/src/core_scan.erl +++ b/lib/compiler/src/core_scan.erl @@ -58,6 +58,12 @@ -type error_description() :: term(). -type error_info() :: {erl_anno:location(), module(), error_description()}. +-define(IS_UNICODE(C), + (is_integer(C) andalso + (C >= 0 andalso C < 16#D800 orelse + C > 16#DFFF andalso C < 16#FFFE orelse + C > 16#FFFF andalso C =< 16#10FFFF))). + %% string([Char]) -> %% string([Char], StartPos) -> %% {ok, [Tok], EndPos} | @@ -256,6 +262,8 @@ scan(Cs, Pos) -> %% scan1(Characters, TokenStack, Position) %% Scan a list of characters into tokens. +scan1([C|_s], _Toks, _Pos) when not ?IS_UNICODE(C) -> + error({badchar,C}); scan1([$\n|Cs], Toks, Pos) -> %Skip newline scan1(Cs, Toks, Pos+1); scan1([C|Cs], Toks, Pos) when C >= $\000, C =< $\s -> %Skip control chars @@ -272,9 +280,9 @@ scan1([C|Cs], Toks, Pos) when C >= $À, C =< $Þ, C /= $× -> scan_variable(C, Cs, Toks, Pos); scan1([C|Cs], Toks, Pos) when C >= $0, C =< $9 -> %Numbers scan_number(C, Cs, Toks, Pos); -scan1([$-,C|Cs], Toks, Pos) when C >= $0, C =< $9 -> %Signed numbers +scan1([$-,C|Cs], Toks, Pos) when is_integer(C), C >= $0, C =< $9 -> %Signed numbers scan_signed_number($-, C, Cs, Toks, Pos); -scan1([$+,C|Cs], Toks, Pos) when C >= $0, C =< $9 -> %Signed numbers +scan1([$+,C|Cs], Toks, Pos) when is_integer(C), C >= $0, C =< $9 -> %Signed numbers scan_signed_number($+, C, Cs, Toks, Pos); scan1([$_|Cs], Toks, Pos) -> %_ variables scan_variable($_, Cs, Toks, Pos); @@ -338,6 +346,8 @@ scan_name([C|Cs], Ncs) -> scan_name([], Ncs) -> {Ncs,[]}. +name_char(C) when not ?IS_UNICODE(C) -> + error({badchar,C}); name_char(C) when C >= $a, C =< $z -> true; name_char(C) when C >= $ß, C =< $ÿ, C /= $÷ -> true; name_char(C) when C >= $A, C =< $Z -> true; @@ -374,15 +384,18 @@ scan_char([C|Cs], Pos) -> {C,Cs,Pos}. scan_escape([O1,O2,O3|Cs], Pos) when %\<1-3> octal digits - O1 >= $0, O1 =< $7, O2 >= $0, O2 =< $7, O3 >= $0, O3 =< $7 -> + is_integer(O1), O1 >= $0, O1 =< $7, + is_integer(O2), O2 >= $0, O2 =< $7, + is_integer(O3), O3 >= $0, O3 =< $7 -> Val = (O1*8 + O2)*8 + O3 - 73*$0, {Val,Cs,Pos}; scan_escape([O1,O2|Cs], Pos) when - O1 >= $0, O1 =< $7, O2 >= $0, O2 =< $7 -> + is_integer(O1), O1 >= $0, O1 =< $7, + is_integer(O2), O2 >= $0, O2 =< $7 -> Val = (O1*8 + O2) - 9*$0, {Val,Cs,Pos}; scan_escape([O1|Cs], Pos) when - O1 >= $0, O1 =< $7 -> + is_integer(O1), O1 >= $0, O1 =< $7 -> {O1 - $0,Cs,Pos}; scan_escape([$^,C|Cs], Pos) -> %\^X -> CTL-X Val = C band 31, @@ -422,7 +435,8 @@ escape_char(C) -> C. %% SPos == Start position %% CPos == Current position -scan_number(C, Cs0, Toks, Pos) -> +scan_number(C, Cs0, Toks, Pos) when + is_integer(C), C >= $0, C =< $9 -> {Ncs,Cs,Pos1} = scan_integer(Cs0, [C], Pos), scan_after_int(Cs, Ncs, Toks, Pos, Pos1). @@ -430,17 +444,19 @@ scan_signed_number(S, C, Cs0, Toks, Pos) -> {Ncs,Cs,Pos1} = scan_integer(Cs0, [C,S], Pos), scan_after_int(Cs, Ncs, Toks, Pos, Pos1). -scan_integer([C|Cs], Stack, Pos) when C >= $0, C =< $9 -> +scan_integer([C|Cs], Stack, Pos) when + is_integer(C), C >= $0, C =< $9 -> scan_integer(Cs, [C|Stack], Pos); scan_integer(Cs, Stack, Pos) -> {Stack,Cs,Pos}. -scan_after_int([$.,C|Cs0], Ncs0, Toks, SPos, CPos) when C >= $0, C =< $9 -> +scan_after_int([$.,C|Cs0], Ncs0, Toks, SPos, CPos) when + is_integer(C), C >= $0, C =< $9 -> {Ncs,Cs,CPos1} = scan_integer(Cs0, [C,$.|Ncs0], CPos), - scan_after_fraction(Cs, Ncs, Toks, SPos, CPos1); + scan_after_fraction(Cs, Ncs, Toks, SPos, CPos1); scan_after_int([$#|Cs], Ncs, Toks, SPos, CPos) -> case list_to_integer(reverse(Ncs)) of - Base when Base >= 2, Base =< 16 -> + Base when is_integer(Base), Base >= 2, Base =< 16 -> scan_based_int(Cs, 0, Base, Toks, SPos, CPos); Base -> scan_error({base,Base}, CPos) @@ -450,15 +466,15 @@ scan_after_int(Cs, Ncs, Toks, SPos, CPos) -> scan1(Cs, [{integer,SPos,N}|Toks], CPos). scan_based_int([C|Cs], SoFar, Base, Toks, SPos, CPos) when - C >= $0, C =< $9, C < Base + $0 -> + is_integer(C), C >= $0, C =< $9, C < Base + $0 -> Next = SoFar * Base + (C - $0), scan_based_int(Cs, Next, Base, Toks, SPos, CPos); scan_based_int([C|Cs], SoFar, Base, Toks, SPos, CPos) when - C >= $a, C =< $f, C < Base + $a - 10 -> + is_integer(C), C >= $a, C =< $f, C < Base + $a - 10 -> Next = SoFar * Base + (C - $a + 10), scan_based_int(Cs, Next, Base, Toks, SPos, CPos); scan_based_int([C|Cs], SoFar, Base, Toks, SPos, CPos) when - C >= $A, C =< $F, C < Base + $A - 10 -> + is_integer(C), C >= $A, C =< $F, C < Base + $A - 10 -> Next = SoFar * Base + (C - $A + 10), scan_based_int(Cs, Next, Base, Toks, SPos, CPos); scan_based_int(Cs, SoFar, _, Toks, SPos, CPos) -> @@ -485,7 +501,8 @@ scan_exponent([$-|Cs], Ncs, Toks, SPos, CPos) -> scan_exponent(Cs, Ncs, Toks, SPos, CPos) -> scan_exponent1(Cs, Ncs, Toks, SPos, CPos). -scan_exponent1([C|Cs0], Ncs0, Toks, SPos, CPos) when C >= $0, C =< $9 -> +scan_exponent1([C|Cs0], Ncs0, Toks, SPos, CPos) when + is_integer(C), C >= $0, C =< $9 -> {Ncs,Cs,CPos1} = scan_integer(Cs0, [C|Ncs0], CPos), case catch list_to_float(reverse(Ncs)) of N when is_float(N) -> -- 2.35.3
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