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1 /*
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2 * Copyright 1997-2000 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 # include "incls/_precompiled.incl"
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26 # include "incls/_fieldType.cpp.incl"
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27
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28 void FieldType::skip_optional_size(symbolOop signature, int* index) {
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29 jchar c = signature->byte_at(*index);
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30 while (c >= '0' && c <= '9') {
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31 *index = *index + 1;
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32 c = signature->byte_at(*index);
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33 }
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34 }
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35
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36 BasicType FieldType::basic_type(symbolOop signature) {
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37 return char2type(signature->byte_at(0));
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38 }
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39
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40 // Check if it is a valid array signature
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41 bool FieldType::is_valid_array_signature(symbolOop sig) {
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42 assert(sig->utf8_length() > 1, "this should already have been checked");
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43 assert(sig->byte_at(0) == '[', "this should already have been checked");
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44 // The first character is already checked
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45 int i = 1;
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46 int len = sig->utf8_length();
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47 // First skip all '['s
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48 while(i < len - 1 && sig->byte_at(i) == '[') i++;
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49
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50 // Check type
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51 switch(sig->byte_at(i)) {
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52 case 'B': // T_BYTE
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53 case 'C': // T_CHAR
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54 case 'D': // T_DOUBLE
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55 case 'F': // T_FLOAT
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56 case 'I': // T_INT
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57 case 'J': // T_LONG
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58 case 'S': // T_SHORT
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59 case 'Z': // T_BOOLEAN
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60 // If it is an array, the type is the last character
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61 return (i + 1 == len);
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62 case 'L':
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63 // If it is an object, the last character must be a ';'
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64 return sig->byte_at(len - 1) == ';';
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65 }
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66
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67 return false;
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68 }
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69
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70
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71 BasicType FieldType::get_array_info(symbolOop signature, jint* dimension, symbolOop* object_key, TRAPS) {
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72 assert(basic_type(signature) == T_ARRAY, "must be array");
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73 int index = 1;
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74 int dim = 1;
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75 skip_optional_size(signature, &index);
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76 while (signature->byte_at(index) == '[') {
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77 index++;
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78 dim++;
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79 skip_optional_size(signature, &index);
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80 }
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81 ResourceMark rm;
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82 symbolOop element = oopFactory::new_symbol(signature->as_C_string() + index, CHECK_(T_BYTE));
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83 BasicType element_type = FieldType::basic_type(element);
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84 if (element_type == T_OBJECT) {
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85 char* object_type = element->as_C_string();
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86 object_type[element->utf8_length() - 1] = '\0';
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87 *object_key = oopFactory::new_symbol(object_type + 1, CHECK_(T_BYTE));
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88 }
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89 // Pass dimension back to caller
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90 *dimension = dim;
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91 return element_type;
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92 }
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