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16 package org.yaml.snakeyaml.scanner;
17
18 import java.util.Arrays;
19
20 public final class Constant {
21 private final static String ALPHA_S = "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-_";
22
23 private final static String LINEBR_S = "\n\u0085\u2028\u2029";
24 private final static String FULL_LINEBR_S = "\r" + LINEBR_S;
25 private final static String NULL_OR_LINEBR_S = "\0" + FULL_LINEBR_S;
26 private final static String NULL_BL_LINEBR_S = " " + NULL_OR_LINEBR_S;
27 private final static String NULL_BL_T_LINEBR_S = "\t" + NULL_BL_LINEBR_S;
28 private final static String NULL_BL_T_S = "\0 \t";
29 private final static String URI_CHARS_S = ALPHA_S + "-;/?:@&=+$,_.!~*\'()[]%";
30
31 public final static Constant LINEBR = new Constant(LINEBR_S);
32 public final static Constant FULL_LINEBR = new Constant(FULL_LINEBR_S);
33 public final static Constant NULL_OR_LINEBR = new Constant(NULL_OR_LINEBR_S);
34 public final static Constant NULL_BL_LINEBR = new Constant(NULL_BL_LINEBR_S);
35 public final static Constant NULL_BL_T_LINEBR = new Constant(NULL_BL_T_LINEBR_S);
36 public final static Constant NULL_BL_T = new Constant(NULL_BL_T_S);
37 public final static Constant URI_CHARS = new Constant(URI_CHARS_S);
38
39 public final static Constant ALPHA = new Constant(ALPHA_S);
40
41 private String content;
42 boolean[] contains = new boolean[128];
43 boolean noASCII = false;
44
45 private Constant(String content) {
46 Arrays.fill(contains, false);
47 StringBuilder sb = new StringBuilder();
48 for (int i = 0; i < content.length(); i++) {
49 char ch = content.charAt(i);
50 if (ch < 128)
51 contains[ch] = true;
52 else
53 sb.append(ch);
54 }
55 if (sb.length() > 0) {
56 noASCII = true;
57 this.content = sb.toString();
58 }
59 }
60
61 public boolean has(char ch) {
62 return (ch < 128) ? contains[ch] : noASCII && content.indexOf(ch, 0) != -1;
63 }
64
65 public boolean hasNo(char ch) {
66 return !has(ch);
67 }
68
69 public boolean has(char ch, String additional) {
70 return has(ch) || additional.indexOf(ch, 0) != -1;
71 }
72
73 public boolean hasNo(char ch, String additional) {
74 return !has(ch, additional);
75 }
76 }