Mercurial > hg > truffle
annotate src/share/vm/utilities/utf8.cpp @ 17977:0b9500028980
8029381: assert(is_method_type()) failed: bad cast
Summary: Access to method_type and appendix from constant pool (cpcache) needs to be guarded by is_f1_null() because of racy update/initialization.
Reviewed-by: kvn, coleenp, jrose
author | drchase |
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date | Mon, 02 Jun 2014 14:32:29 -0400 |
parents | 8c03fc47511d |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "utilities/utf8.hpp" | |
0 | 27 |
28 // Assume the utf8 string is in legal form and has been | |
29 // checked in the class file parser/format checker. | |
30 char* UTF8::next(const char* str, jchar* value) { | |
31 unsigned const char *ptr = (const unsigned char *)str; | |
32 unsigned char ch, ch2, ch3; | |
33 int length = -1; /* bad length */ | |
34 jchar result; | |
35 switch ((ch = ptr[0]) >> 4) { | |
36 default: | |
37 result = ch; | |
38 length = 1; | |
39 break; | |
40 | |
41 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF: | |
42 /* Shouldn't happen. */ | |
43 break; | |
44 | |
45 case 0xC: case 0xD: | |
46 /* 110xxxxx 10xxxxxx */ | |
47 if (((ch2 = ptr[1]) & 0xC0) == 0x80) { | |
48 unsigned char high_five = ch & 0x1F; | |
49 unsigned char low_six = ch2 & 0x3F; | |
50 result = (high_five << 6) + low_six; | |
51 length = 2; | |
52 break; | |
53 } | |
54 break; | |
55 | |
56 case 0xE: | |
57 /* 1110xxxx 10xxxxxx 10xxxxxx */ | |
58 if (((ch2 = ptr[1]) & 0xC0) == 0x80) { | |
59 if (((ch3 = ptr[2]) & 0xC0) == 0x80) { | |
60 unsigned char high_four = ch & 0x0f; | |
61 unsigned char mid_six = ch2 & 0x3f; | |
62 unsigned char low_six = ch3 & 0x3f; | |
63 result = (((high_four << 6) + mid_six) << 6) + low_six; | |
64 length = 3; | |
65 } | |
66 } | |
67 break; | |
68 } /* end of switch */ | |
69 | |
70 if (length <= 0) { | |
71 *value = ptr[0]; /* default bad result; */ | |
72 return (char*)(ptr + 1); // make progress somehow | |
73 } | |
74 | |
75 *value = result; | |
76 | |
77 // The assert is correct but the .class file is wrong | |
78 // assert(UNICODE::utf8_size(result) == length, "checking reverse computation"); | |
79 return (char *)(ptr + length); | |
80 } | |
81 | |
82 char* UTF8::next_character(const char* str, jint* value) { | |
83 unsigned const char *ptr = (const unsigned char *)str; | |
84 /* See if it's legal supplementary character: | |
85 11101101 1010xxxx 10xxxxxx 11101101 1011xxxx 10xxxxxx */ | |
86 if (is_supplementary_character(ptr)) { | |
87 *value = get_supplementary_character(ptr); | |
88 return (char *)(ptr + 6); | |
89 } | |
90 jchar result; | |
91 char* next_ch = next(str, &result); | |
92 *value = result; | |
93 return next_ch; | |
94 } | |
95 | |
96 // Count bytes of the form 10xxxxxx and deduct this count | |
97 // from the total byte count. The utf8 string must be in | |
98 // legal form which has been verified in the format checker. | |
99 int UTF8::unicode_length(const char* str, int len) { | |
100 int num_chars = len; | |
101 for (int i = 0; i < len; i++) { | |
102 if ((str[i] & 0xC0) == 0x80) { | |
103 --num_chars; | |
104 } | |
105 } | |
106 return num_chars; | |
107 } | |
108 | |
109 // Count bytes of the utf8 string except those in form | |
110 // 10xxxxxx which only appear in multibyte characters. | |
111 // The utf8 string must be in legal form and has been | |
112 // verified in the format checker. | |
113 int UTF8::unicode_length(const char* str) { | |
114 int num_chars = 0; | |
115 for (const char* p = str; *p; p++) { | |
116 if (((*p) & 0xC0) != 0x80) { | |
117 num_chars++; | |
118 } | |
119 } | |
120 return num_chars; | |
121 } | |
122 | |
123 // Writes a jchar a utf8 and returns the end | |
124 static u_char* utf8_write(u_char* base, jchar ch) { | |
125 if ((ch != 0) && (ch <=0x7f)) { | |
126 base[0] = (u_char) ch; | |
127 return base + 1; | |
128 } | |
129 | |
130 if (ch <= 0x7FF) { | |
131 /* 11 bits or less. */ | |
132 unsigned char high_five = ch >> 6; | |
133 unsigned char low_six = ch & 0x3F; | |
134 base[0] = high_five | 0xC0; /* 110xxxxx */ | |
135 base[1] = low_six | 0x80; /* 10xxxxxx */ | |
136 return base + 2; | |
137 } | |
138 /* possibly full 16 bits. */ | |
139 char high_four = ch >> 12; | |
140 char mid_six = (ch >> 6) & 0x3F; | |
141 char low_six = ch & 0x3f; | |
142 base[0] = high_four | 0xE0; /* 1110xxxx */ | |
143 base[1] = mid_six | 0x80; /* 10xxxxxx */ | |
144 base[2] = low_six | 0x80; /* 10xxxxxx */ | |
145 return base + 3; | |
146 } | |
147 | |
148 void UTF8::convert_to_unicode(const char* utf8_str, jchar* unicode_str, int unicode_length) { | |
149 unsigned char ch; | |
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150 const char *ptr = utf8_str; |
0 | 151 int index = 0; |
152 | |
153 /* ASCII case loop optimization */ | |
154 for (; index < unicode_length; index++) { | |
155 if((ch = ptr[0]) > 0x7F) { break; } | |
156 unicode_str[index] = ch; | |
157 ptr = (const char *)(ptr + 1); | |
158 } | |
159 | |
160 for (; index < unicode_length; index++) { | |
161 ptr = UTF8::next(ptr, &unicode_str[index]); | |
162 } | |
163 } | |
164 | |
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165 // returns the quoted ascii length of a 0-terminated utf8 string |
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166 int UTF8::quoted_ascii_length(const char* utf8_str, int utf8_length) { |
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167 const char *ptr = utf8_str; |
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168 const char* end = ptr + utf8_length; |
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169 int result = 0; |
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170 while (ptr < end) { |
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171 jchar c; |
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172 ptr = UTF8::next(ptr, &c); |
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173 if (c >= 32 && c < 127) { |
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174 result++; |
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175 } else { |
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176 result += 6; |
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177 } |
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178 } |
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179 return result; |
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180 } |
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181 |
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182 // converts a utf8 string to quoted ascii |
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183 void UTF8::as_quoted_ascii(const char* utf8_str, int utf8_length, char* buf, int buflen) { |
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184 const char *ptr = utf8_str; |
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185 const char *utf8_end = ptr + utf8_length; |
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186 char* p = buf; |
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187 char* end = buf + buflen; |
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188 while (ptr < utf8_end) { |
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189 jchar c; |
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190 ptr = UTF8::next(ptr, &c); |
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191 if (c >= 32 && c < 127) { |
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192 if (p + 1 >= end) break; // string is truncated |
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193 *p++ = (char)c; |
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194 } else { |
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195 if (p + 6 >= end) break; // string is truncated |
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196 sprintf(p, "\\u%04x", c); |
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197 p += 6; |
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198 } |
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199 } |
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200 assert(p < end, "sanity"); |
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201 *p = '\0'; |
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202 } |
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203 |
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204 |
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205 const char* UTF8::from_quoted_ascii(const char* quoted_ascii_str) { |
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206 const char *ptr = quoted_ascii_str; |
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207 char* result = NULL; |
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208 while (*ptr != '\0') { |
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209 char c = *ptr; |
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210 if (c < 32 || c >= 127) break; |
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211 } |
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212 if (*ptr == '\0') { |
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213 // nothing to do so return original string |
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214 return quoted_ascii_str; |
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215 } |
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216 // everything up to this point was ok. |
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217 int length = ptr - quoted_ascii_str; |
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218 char* buffer = NULL; |
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219 for (int round = 0; round < 2; round++) { |
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220 while (*ptr != '\0') { |
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221 if (*ptr != '\\') { |
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222 if (buffer != NULL) { |
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223 buffer[length] = *ptr; |
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224 } |
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225 length++; |
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226 } else { |
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227 switch (ptr[1]) { |
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228 case 'u': { |
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229 ptr += 2; |
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230 jchar value=0; |
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231 for (int i=0; i<4; i++) { |
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232 char c = *ptr++; |
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233 switch (c) { |
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234 case '0': case '1': case '2': case '3': case '4': |
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235 case '5': case '6': case '7': case '8': case '9': |
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236 value = (value << 4) + c - '0'; |
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237 break; |
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238 case 'a': case 'b': case 'c': |
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239 case 'd': case 'e': case 'f': |
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240 value = (value << 4) + 10 + c - 'a'; |
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241 break; |
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242 case 'A': case 'B': case 'C': |
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243 case 'D': case 'E': case 'F': |
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244 value = (value << 4) + 10 + c - 'A'; |
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245 break; |
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246 default: |
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247 ShouldNotReachHere(); |
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248 } |
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249 } |
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250 if (buffer == NULL) { |
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251 char utf8_buffer[4]; |
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252 char* next = (char*)utf8_write((u_char*)utf8_buffer, value); |
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253 length += next - utf8_buffer; |
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254 } else { |
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255 char* next = (char*)utf8_write((u_char*)&buffer[length], value); |
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256 length += next - &buffer[length]; |
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257 } |
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258 break; |
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259 } |
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260 case 't': if (buffer != NULL) buffer[length] = '\t'; ptr += 2; length++; break; |
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261 case 'n': if (buffer != NULL) buffer[length] = '\n'; ptr += 2; length++; break; |
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262 case 'r': if (buffer != NULL) buffer[length] = '\r'; ptr += 2; length++; break; |
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263 case 'f': if (buffer != NULL) buffer[length] = '\f'; ptr += 2; length++; break; |
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264 default: |
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265 ShouldNotReachHere(); |
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266 } |
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267 } |
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268 } |
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269 if (round == 0) { |
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270 buffer = NEW_RESOURCE_ARRAY(char, length + 1); |
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271 ptr = quoted_ascii_str; |
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272 } else { |
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273 buffer[length] = '\0'; |
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274 } |
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275 } |
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276 return buffer; |
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277 } |
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278 |
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279 |
0 | 280 // Returns NULL if 'c' it not found. This only works as long |
281 // as 'c' is an ASCII character | |
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282 const jbyte* UTF8::strrchr(const jbyte* base, int length, jbyte c) { |
0 | 283 assert(length >= 0, "sanity check"); |
284 assert(c >= 0, "does not work for non-ASCII characters"); | |
285 // Skip backwards in string until 'c' is found or end is reached | |
286 while(--length >= 0 && base[length] != c); | |
287 return (length < 0) ? NULL : &base[length]; | |
288 } | |
289 | |
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290 bool UTF8::equal(const jbyte* base1, int length1, const jbyte* base2, int length2) { |
0 | 291 // Length must be the same |
292 if (length1 != length2) return false; | |
293 for (int i = 0; i < length1; i++) { | |
294 if (base1[i] != base2[i]) return false; | |
295 } | |
296 return true; | |
297 } | |
298 | |
299 bool UTF8::is_supplementary_character(const unsigned char* str) { | |
300 return ((str[0] & 0xFF) == 0xED) && ((str[1] & 0xF0) == 0xA0) && ((str[2] & 0xC0) == 0x80) | |
301 && ((str[3] & 0xFF) == 0xED) && ((str[4] & 0xF0) == 0xB0) && ((str[5] & 0xC0) == 0x80); | |
302 } | |
303 | |
304 jint UTF8::get_supplementary_character(const unsigned char* str) { | |
305 return 0x10000 + ((str[1] & 0x0f) << 16) + ((str[2] & 0x3f) << 10) | |
306 + ((str[4] & 0x0f) << 6) + (str[5] & 0x3f); | |
307 } | |
308 | |
309 | |
310 //------------------------------------------------------------------------------------- | |
311 | |
312 | |
313 int UNICODE::utf8_size(jchar c) { | |
314 if ((0x0001 <= c) && (c <= 0x007F)) return 1; | |
315 if (c <= 0x07FF) return 2; | |
316 return 3; | |
317 } | |
318 | |
319 int UNICODE::utf8_length(jchar* base, int length) { | |
320 int result = 0; | |
321 for (int index = 0; index < length; index++) { | |
322 jchar c = base[index]; | |
323 if ((0x0001 <= c) && (c <= 0x007F)) result += 1; | |
324 else if (c <= 0x07FF) result += 2; | |
325 else result += 3; | |
326 } | |
327 return result; | |
328 } | |
329 | |
330 char* UNICODE::as_utf8(jchar* base, int length) { | |
331 int utf8_len = utf8_length(base, length); | |
332 u_char* result = NEW_RESOURCE_ARRAY(u_char, utf8_len + 1); | |
333 u_char* p = result; | |
334 for (int index = 0; index < length; index++) { | |
335 p = utf8_write(p, base[index]); | |
336 } | |
337 *p = '\0'; | |
338 assert(p == &result[utf8_len], "length prediction must be correct"); | |
339 return (char*) result; | |
340 } | |
341 | |
342 char* UNICODE::as_utf8(jchar* base, int length, char* buf, int buflen) { | |
343 u_char* p = (u_char*)buf; | |
344 u_char* end = (u_char*)buf + buflen; | |
345 for (int index = 0; index < length; index++) { | |
346 jchar c = base[index]; | |
347 if (p + utf8_size(c) >= end) break; // string is truncated | |
348 p = utf8_write(p, base[index]); | |
349 } | |
350 *p = '\0'; | |
351 return buf; | |
352 } | |
353 | |
354 void UNICODE::convert_to_utf8(const jchar* base, int length, char* utf8_buffer) { | |
355 for(int index = 0; index < length; index++) { | |
356 utf8_buffer = (char*)utf8_write((u_char*)utf8_buffer, base[index]); | |
357 } | |
358 *utf8_buffer = '\0'; | |
359 } | |
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360 |
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361 // returns the quoted ascii length of a unicode string |
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362 int UNICODE::quoted_ascii_length(jchar* base, int length) { |
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363 int result = 0; |
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364 for (int i = 0; i < length; i++) { |
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365 jchar c = base[i]; |
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366 if (c >= 32 && c < 127) { |
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367 result++; |
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368 } else { |
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369 result += 6; |
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370 } |
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371 } |
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372 return result; |
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373 } |
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374 |
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375 // converts a utf8 string to quoted ascii |
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376 void UNICODE::as_quoted_ascii(const jchar* base, int length, char* buf, int buflen) { |
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377 char* p = buf; |
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378 char* end = buf + buflen; |
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379 for (int index = 0; index < length; index++) { |
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380 jchar c = base[index]; |
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381 if (c >= 32 && c < 127) { |
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382 if (p + 1 >= end) break; // string is truncated |
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383 *p++ = (char)c; |
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384 } else { |
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385 if (p + 6 >= end) break; // string is truncated |
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386 sprintf(p, "\\u%04x", c); |
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387 p += 6; |
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388 } |
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389 } |
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390 *p = '\0'; |
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391 } |