Merge pull request #296 from fishrdev/literalscanning

ststeiger · web-flow · commit 63ab5239fcfa · 2022-09-22T10:50:27.000+02:00
Ignore single backslash when scanning literal string
diff --git a/PdfSharpCore/Pdf.IO/Lexer.cs b/PdfSharpCore/Pdf.IO/Lexer.cs
@@ -500,7 +500,8 @@ public Symbol ScanLiteralString()
                                     {
                                         // Octal character code.
                                         if (ch >= '8')
-                                            ParserDiagnostics.HandleUnexpectedCharacter(ch);
+                                            break; // Since the first possible octal character is not valid,
+                                                   // the backslash is ignored. 
 
                                         int n = ch - '0';
                                         if (char.IsDigit(_nextChar))  // Second octal character.
@@ -521,12 +522,6 @@ public Symbol ScanLiteralString()
                                         }
                                         ch = (char)n;
                                     }
-                                    else
-                                    {
-                                        //TODO
-                                        // Debug.As sert(false, "Not implemented; unknown escape character.");
-                                        ParserDiagnostics.HandleUnexpectedCharacter(ch);
-                                    }
                                     break;
                             }
                             break;

Original file line number	Diff line number	Diff line change
`@@ -500,7 +500,8 @@ public Symbol ScanLiteralString()`
`500`	`500`	`{`
`501`	`501`	`// Octal character code.`
`502`	`502`	`if (ch >= '8')`
`503`		`- ParserDiagnostics.HandleUnexpectedCharacter(ch);`
	`503`	`+ break; // Since the first possible octal character is not valid,`
	`504`	`+ // the backslash is ignored.`
`504`	`505`
`505`	`506`	`int n = ch - '0';`
`506`	`507`	`if (char.IsDigit(_nextChar)) // Second octal character.`
`@@ -521,12 +522,6 @@ public Symbol ScanLiteralString()`
`521`	`522`	`}`
`522`	`523`	`ch = (char)n;`
`523`	`524`	`}`
`524`		`- else`
`525`		`- {`
`526`		`- //TODO`
`527`		`- // Debug.As sert(false, "Not implemented; unknown escape character.");`
`528`		`- ParserDiagnostics.HandleUnexpectedCharacter(ch);`
`529`		`- }`
`530`	`525`	`break;`
`531`	`526`	`}`
`532`	`527`	`break;`