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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| // | ||
| // GLLASCIIScanner.m | ||
| // GLLara | ||
| // | ||
| // Created by Torsten Kammer on 01.09.12. | ||
| // Copyright (c) 2012 Torsten Kammer. All rights reserved. | ||
| // | ||
| import Foundation | ||
|
|
||
| /*! | ||
| * @abstract Reader for the .mesh.ascii format. | ||
| * @discussion It was deliberately designed to have the same interface as the | ||
| * TRInDataStream. Thus, it can read integers in different widths, although | ||
| * parsing them from an ASCII file is always the same work. | ||
| */ | ||
| class GLLASCIIScanner: GLLDataReader { | ||
| init(string: String) { | ||
| scanner = Scanner(string: string) | ||
| // Use american english at all times, because that is the number format used. | ||
| scanner.locale = Locale(identifier: "en_US") | ||
| } | ||
|
|
||
| private let scanner: Scanner | ||
|
|
||
| func readUint32() -> UInt32 { | ||
| return UInt32(readInteger()) | ||
| } | ||
|
|
||
| func readUint16() -> UInt16 { | ||
| return UInt16(readInteger()) | ||
| } | ||
|
|
||
| func readUint8() -> UInt8 { | ||
| return UInt8(readInteger()) | ||
| } | ||
|
|
||
| func readFloat32() -> Float32 { | ||
| skipComments() | ||
| if scanner.isAtEnd { | ||
| isValid = false | ||
| return 0.0 | ||
| } | ||
|
|
||
| guard let result = scanner.scanFloat() else { | ||
| if (scanner.scanString("NaN") != nil) { | ||
| // Haha, very funny. Idiots. | ||
| return Float.nan | ||
| } else { | ||
| isValid = false | ||
| return 0.0 | ||
| } | ||
| } | ||
| return result | ||
| } | ||
|
|
||
| func readPascalString() -> String { | ||
| skipComments() | ||
| if scanner.isAtEnd { | ||
| isValid = false | ||
| return "" | ||
| } | ||
|
|
||
| _ = scanner.scanCharacters(from: CharacterSet.whitespacesAndNewlines) | ||
| guard let result = scanner.scanUpToCharacters(from: CharacterSet.newlines) else { | ||
| isValid = false | ||
| return "" | ||
| } | ||
| return result | ||
| } | ||
|
|
||
| func hasNewline() -> Bool { | ||
| // Skip only whitespace, not newline, because the scanner won't recognize the newline otherwise | ||
| scanner.charactersToBeSkipped = CharacterSet.whitespaces | ||
| if scanner.scanString("#") != nil { | ||
| // Has a comment, which ends a line. | ||
| _ = scanner.scanUpToCharacters(from: CharacterSet.newlines) | ||
| scanner.charactersToBeSkipped = CharacterSet.whitespacesAndNewlines | ||
| return true | ||
| } else if scanner.scanCharacters(from: CharacterSet.newlines) != nil { | ||
| // Has newline, which obviously ends a line. | ||
| scanner.charactersToBeSkipped = CharacterSet.whitespacesAndNewlines | ||
| return true | ||
| } | ||
| scanner.charactersToBeSkipped = CharacterSet.whitespacesAndNewlines | ||
| return false | ||
| } | ||
|
|
||
| var isValid: Bool = true | ||
|
|
||
| private func skipComments() { | ||
| while scanner.scanString("#") != nil { | ||
| _ = scanner.scanUpToCharacters(from: CharacterSet.newlines) | ||
| } | ||
| } | ||
|
|
||
| private func readInteger() -> Int { | ||
| skipComments() | ||
| if scanner.isAtEnd { | ||
| isValid = false | ||
| return 0 | ||
| } | ||
|
|
||
| guard let result = scanner.scanInt() else { | ||
| isValid = false | ||
| return 0 | ||
| } | ||
| return result | ||
| } | ||
| } |
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