1 /* |
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2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "oops/oop.inline.hpp" |
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27 #include "oops/symbolOop.hpp" |
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28 |
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29 |
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30 // ------------------------------------------------------------------ |
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31 // symbolOopDesc::equals |
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32 // |
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33 // Compares the symbol with a string of the given length. |
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34 bool symbolOopDesc::equals(const char* str, int len) const { |
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35 int l = utf8_length(); |
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36 if (l != len) return false; |
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37 while (l-- > 0) { |
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38 if (str[l] != (char) byte_at(l)) |
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39 return false; |
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40 } |
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41 assert(l == -1, "we should be at the beginning"); |
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42 return true; |
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43 } |
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44 |
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45 |
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46 // ------------------------------------------------------------------ |
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47 // symbolOopDesc::starts_with |
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48 // |
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49 // Tests if the symbol starts with the specified prefix of the given |
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50 // length. |
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51 bool symbolOopDesc::starts_with(const char* prefix, int len) const { |
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52 if (len > utf8_length()) return false; |
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53 while (len-- > 0) { |
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54 if (prefix[len] != (char) byte_at(len)) |
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55 return false; |
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56 } |
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57 assert(len == -1, "we should be at the beginning"); |
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58 return true; |
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59 } |
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60 |
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61 |
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62 // ------------------------------------------------------------------ |
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63 // symbolOopDesc::index_of |
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64 // |
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65 // Finds if the given string is a substring of this symbol's utf8 bytes. |
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66 // Return -1 on failure. Otherwise return the first index where str occurs. |
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67 int symbolOopDesc::index_of_at(int i, const char* str, int len) const { |
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68 assert(i >= 0 && i <= utf8_length(), "oob"); |
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69 if (len <= 0) return 0; |
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70 char first_char = str[0]; |
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71 address bytes = (address) ((symbolOopDesc*)this)->base(); |
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72 address limit = bytes + utf8_length() - len; // inclusive limit |
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73 address scan = bytes + i; |
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74 if (scan > limit) |
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75 return -1; |
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76 for (;;) { |
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77 scan = (address) memchr(scan, first_char, (limit + 1 - scan)); |
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78 if (scan == NULL) |
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79 return -1; // not found |
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80 assert(scan >= bytes+i && scan <= limit, "scan oob"); |
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81 if (memcmp(scan, str, len) == 0) |
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82 return (int)(scan - bytes); |
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83 } |
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84 } |
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85 |
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86 |
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87 char* symbolOopDesc::as_C_string(char* buf, int size) const { |
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88 if (size > 0) { |
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89 int len = MIN2(size - 1, utf8_length()); |
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90 for (int i = 0; i < len; i++) { |
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91 buf[i] = byte_at(i); |
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92 } |
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93 buf[len] = '\0'; |
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94 } |
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95 return buf; |
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96 } |
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97 |
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98 char* symbolOopDesc::as_C_string() const { |
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99 int len = utf8_length(); |
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100 char* str = NEW_RESOURCE_ARRAY(char, len + 1); |
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101 return as_C_string(str, len + 1); |
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102 } |
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103 |
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104 char* symbolOopDesc::as_C_string_flexible_buffer(Thread* t, |
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105 char* buf, int size) const { |
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106 char* str; |
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107 int len = utf8_length(); |
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108 int buf_len = len + 1; |
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109 if (size < buf_len) { |
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110 str = NEW_RESOURCE_ARRAY(char, buf_len); |
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111 } else { |
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112 str = buf; |
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113 } |
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114 return as_C_string(str, buf_len); |
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115 } |
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116 |
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117 void symbolOopDesc::print_symbol_on(outputStream* st) { |
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118 st = st ? st : tty; |
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119 int length = UTF8::unicode_length((const char*)bytes(), utf8_length()); |
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120 const char *ptr = (const char *)bytes(); |
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121 jchar value; |
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122 for (int index = 0; index < length; index++) { |
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123 ptr = UTF8::next(ptr, &value); |
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124 if (value >= 32 && value < 127 || value == '\'' || value == '\\') { |
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125 st->put(value); |
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126 } else { |
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127 st->print("\\u%04x", value); |
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128 } |
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129 } |
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130 } |
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131 |
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132 jchar* symbolOopDesc::as_unicode(int& length) const { |
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133 symbolOopDesc* this_ptr = (symbolOopDesc*)this; |
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134 length = UTF8::unicode_length((char*)this_ptr->bytes(), utf8_length()); |
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135 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); |
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136 if (length > 0) { |
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137 UTF8::convert_to_unicode((char*)this_ptr->bytes(), result, length); |
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138 } |
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139 return result; |
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140 } |
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141 |
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142 const char* symbolOopDesc::as_klass_external_name(char* buf, int size) const { |
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143 if (size > 0) { |
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144 char* str = as_C_string(buf, size); |
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145 int length = (int)strlen(str); |
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146 // Turn all '/'s into '.'s (also for array klasses) |
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147 for (int index = 0; index < length; index++) { |
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148 if (str[index] == '/') { |
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149 str[index] = '.'; |
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150 } |
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151 } |
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152 return str; |
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153 } else { |
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154 return buf; |
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155 } |
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156 } |
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157 |
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158 const char* symbolOopDesc::as_klass_external_name() const { |
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159 char* str = as_C_string(); |
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160 int length = (int)strlen(str); |
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161 // Turn all '/'s into '.'s (also for array klasses) |
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162 for (int index = 0; index < length; index++) { |
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163 if (str[index] == '/') { |
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164 str[index] = '.'; |
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165 } |
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166 } |
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167 return str; |
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168 } |
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