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Let Lexer.getNumber treat a single minus sign as zero (bug 1753983)

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This appears to be consistent with the behaviour in both Adobe Reader and PDFium (in Google Chrome); this is essentially the same approach as used for a single decimal point in PR 9827.
This commit is contained in:
Jonas Jenwald 2022-02-07 16:14:45 +01:00
parent acc758c40c
commit 64f3dbeb48
5 changed files with 27 additions and 12 deletions
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17
src/core/parser.js
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@ -908,14 +908,17 @@ class Lexer {
ch = this.nextChar();
}
if (ch < /* '0' = */ 0x30 || ch > /* '9' = */ 0x39) {
if (
divideBy === 10 &&
sign === 0 &&
(isWhiteSpace(ch) || ch === /* EOF = */ -1)
) {
if (isWhiteSpace(ch) || ch === /* EOF = */ -1) {
// This is consistent with Adobe Reader (fixes issue9252.pdf).
warn("Lexer.getNumber - treating a single decimal point as zero.");
return 0;
if (divideBy === 10 && sign === 0) {
warn("Lexer.getNumber - treating a single decimal point as zero.");
return 0;
}
// This is consistent with Adobe Reader (fixes bug1753983.pdf).
if (divideBy === 0 && sign === -1) {
warn("Lexer.getNumber - treating a single minus sign as zero.");
return 0;
}
}
throw new FormatError(
`Invalid number: ${String.fromCharCode(ch)} (charCode ${ch})`