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remove.js
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Created
Sun, Nov 10, 19:55
Size
1 KB
Mime Type
text/x-java
Expires
Tue, Nov 12, 19:55 (1 d, 23 h)
Engine
blob
Format
Raw Data
Handle
22247206
Attached To
rOACCT Open Access Compliance Check Tool (OACCT)
remove.js
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import
{
traverse
,
getSectionMetadatas
,
shiftSection
}
from
"@webassemblyjs/ast"
;
import
{
overrideBytesInBuffer
}
from
"@webassemblyjs/helper-buffer"
;
export
function
removeSections
(
ast
,
uint8Buffer
,
section
)
{
var
sectionMetadatas
=
getSectionMetadatas
(
ast
,
section
);
if
(
sectionMetadatas
.
length
===
0
)
{
throw
new
Error
(
"Section metadata not found"
);
}
return
sectionMetadatas
.
reverse
().
reduce
(
function
(
uint8Buffer
,
sectionMetadata
)
{
var
startsIncludingId
=
sectionMetadata
.
startOffset
-
1
;
var
ends
=
section
===
"start"
?
sectionMetadata
.
size
.
loc
.
end
.
column
+
1
:
sectionMetadata
.
startOffset
+
sectionMetadata
.
size
.
value
+
1
;
var
delta
=
-
(
ends
-
startsIncludingId
);
/**
* update AST
*/
// Once we hit our section every that is after needs to be shifted by the delta
var
encounteredSection
=
false
;
traverse
(
ast
,
{
SectionMetadata
:
function
SectionMetadata
(
path
)
{
if
(
path
.
node
.
section
===
section
)
{
encounteredSection
=
true
;
return
path
.
remove
();
}
if
(
encounteredSection
===
true
)
{
shiftSection
(
ast
,
path
.
node
,
delta
);
}
}
});
// replacement is nothing
var
replacement
=
[];
return
overrideBytesInBuffer
(
uint8Buffer
,
startsIncludingId
,
ends
,
replacement
);
},
uint8Buffer
);
}
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