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comparison src/org/tmatesoft/hg/internal/DigestHelper.java @ 266:0a2f445de774

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Improve manifest parsing: reduce number of arrays instantiated for Nodeid
author Artem Tikhomirov <tikhomirov.artem@gmail.com>
date Fri, 19 Aug 2011 04:59:32 +0200
parents a3a2e5deb320
children 981f9f50bb6c
comparison
equal deleted inserted replaced
265:3dd953c65619 266:0a2f445de774
120 result[j++] = hexDigits.charAt((data[i] >>> 4) & 0x0F); 120 result[j++] = hexDigits.charAt((data[i] >>> 4) & 0x0F);
121 result[j++] = hexDigits.charAt(data[i] & 0x0F); 121 result[j++] = hexDigits.charAt(data[i] & 0x0F);
122 } 122 }
123 return new String(result); 123 return new String(result);
124 } 124 }
125
126 public static boolean ascii2bin(byte[] ascii, int offset, int len, byte[] binary) {
127 assert len % 2 == 0;
128 assert binary.length >= len >>> 1;
129
130 boolean zeroBytes = true;
131 for (int i = 0, j = offset; i < len >>> 1; i++) {
132 int b = ascii[j++] & 0xCF; // -0x30 to get decimal digit out from their char, and to uppercase if a letter
133 int hiNibble = b > 64 ? b - 55 : b;
134 b = ascii[j++] & 0xCF;
135 int lowNibble = b > 64 ? b - 55 : b;
136 if (hiNibble >= 16 || lowNibble >= 16) {
137 throw new IllegalArgumentException(String.format("Characters '%c%c' (%1$d and %2$d) at index %d are not valid hex digits", ascii[j-2], ascii[j-1], j-2));
138 }
139 b = (((hiNibble << 4) | lowNibble) & 0xFF);
140 binary[i] = (byte) b;
141 zeroBytes = zeroBytes && b == 0;
142 }
143 return zeroBytes;
144 }
125 } 145 }