truffle: src/share/vm/utilities/utf8.cpp annotate

annotate src/share/vm/utilities/utf8.cpp @ 8710:9058789475af

7107135: Stack guard pages are no more protected after loading a shared library with executable stack Summary: Detect the execstack attribute of the loaded library and attempt to fix the stack guard using Safepoint op. Reviewed-by: dholmes, zgu Contributed-by: ioi.lam@oracle.com

author	iklam
date	Tue, 05 Mar 2013 13:55:56 -0800
parents	bd7a7ce2e264
children	8c03fc47511d

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
6972 bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 0 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 0 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 0 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	26 #include "utilities/utf8.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	27
a61af66fc99e Initial load duke parents: diff changeset	28 // Assume the utf8 string is in legal form and has been
a61af66fc99e Initial load duke parents: diff changeset	29 // checked in the class file parser/format checker.
a61af66fc99e Initial load duke parents: diff changeset	30 char* UTF8::next(const char* str, jchar* value) {
a61af66fc99e Initial load duke parents: diff changeset	31 unsigned const char ptr = (const unsigned char )str;
a61af66fc99e Initial load duke parents: diff changeset	32 unsigned char ch, ch2, ch3;
a61af66fc99e Initial load duke parents: diff changeset	33 int length = -1; /* bad length */
a61af66fc99e Initial load duke parents: diff changeset	34 jchar result;
a61af66fc99e Initial load duke parents: diff changeset	35 switch ((ch = ptr[0]) >> 4) {
a61af66fc99e Initial load duke parents: diff changeset	36 default:
a61af66fc99e Initial load duke parents: diff changeset	37 result = ch;
a61af66fc99e Initial load duke parents: diff changeset	38 length = 1;
a61af66fc99e Initial load duke parents: diff changeset	39 break;
a61af66fc99e Initial load duke parents: diff changeset	40
a61af66fc99e Initial load duke parents: diff changeset	41 case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
a61af66fc99e Initial load duke parents: diff changeset	42 /* Shouldn't happen. */
a61af66fc99e Initial load duke parents: diff changeset	43 break;
a61af66fc99e Initial load duke parents: diff changeset	44
a61af66fc99e Initial load duke parents: diff changeset	45 case 0xC: case 0xD:
a61af66fc99e Initial load duke parents: diff changeset	46 /* 110xxxxx 10xxxxxx */
a61af66fc99e Initial load duke parents: diff changeset	47 if (((ch2 = ptr[1]) & 0xC0) == 0x80) {
a61af66fc99e Initial load duke parents: diff changeset	48 unsigned char high_five = ch & 0x1F;
a61af66fc99e Initial load duke parents: diff changeset	49 unsigned char low_six = ch2 & 0x3F;
a61af66fc99e Initial load duke parents: diff changeset	50 result = (high_five << 6) + low_six;
a61af66fc99e Initial load duke parents: diff changeset	51 length = 2;
a61af66fc99e Initial load duke parents: diff changeset	52 break;
a61af66fc99e Initial load duke parents: diff changeset	53 }
a61af66fc99e Initial load duke parents: diff changeset	54 break;
a61af66fc99e Initial load duke parents: diff changeset	55
a61af66fc99e Initial load duke parents: diff changeset	56 case 0xE:
a61af66fc99e Initial load duke parents: diff changeset	57 /* 1110xxxx 10xxxxxx 10xxxxxx */
a61af66fc99e Initial load duke parents: diff changeset	58 if (((ch2 = ptr[1]) & 0xC0) == 0x80) {
a61af66fc99e Initial load duke parents: diff changeset	59 if (((ch3 = ptr[2]) & 0xC0) == 0x80) {
a61af66fc99e Initial load duke parents: diff changeset	60 unsigned char high_four = ch & 0x0f;
a61af66fc99e Initial load duke parents: diff changeset	61 unsigned char mid_six = ch2 & 0x3f;
a61af66fc99e Initial load duke parents: diff changeset	62 unsigned char low_six = ch3 & 0x3f;
a61af66fc99e Initial load duke parents: diff changeset	63 result = (((high_four << 6) + mid_six) << 6) + low_six;
a61af66fc99e Initial load duke parents: diff changeset	64 length = 3;
a61af66fc99e Initial load duke parents: diff changeset	65 }
a61af66fc99e Initial load duke parents: diff changeset	66 }
a61af66fc99e Initial load duke parents: diff changeset	67 break;
a61af66fc99e Initial load duke parents: diff changeset	68 } /* end of switch */
a61af66fc99e Initial load duke parents: diff changeset	69
a61af66fc99e Initial load duke parents: diff changeset	70 if (length <= 0) {
a61af66fc99e Initial load duke parents: diff changeset	71 value = ptr[0]; / default bad result; */
a61af66fc99e Initial load duke parents: diff changeset	72 return (char*)(ptr + 1); // make progress somehow
a61af66fc99e Initial load duke parents: diff changeset	73 }
a61af66fc99e Initial load duke parents: diff changeset	74
a61af66fc99e Initial load duke parents: diff changeset	75 *value = result;
a61af66fc99e Initial load duke parents: diff changeset	76
a61af66fc99e Initial load duke parents: diff changeset	77 // The assert is correct but the .class file is wrong
a61af66fc99e Initial load duke parents: diff changeset	78 // assert(UNICODE::utf8_size(result) == length, "checking reverse computation");
a61af66fc99e Initial load duke parents: diff changeset	79 return (char *)(ptr + length);
a61af66fc99e Initial load duke parents: diff changeset	80 }
a61af66fc99e Initial load duke parents: diff changeset	81
a61af66fc99e Initial load duke parents: diff changeset	82 char* UTF8::next_character(const char* str, jint* value) {
a61af66fc99e Initial load duke parents: diff changeset	83 unsigned const char ptr = (const unsigned char )str;
a61af66fc99e Initial load duke parents: diff changeset	84 /* See if it's legal supplementary character:
a61af66fc99e Initial load duke parents: diff changeset	85 11101101 1010xxxx 10xxxxxx 11101101 1011xxxx 10xxxxxx */
a61af66fc99e Initial load duke parents: diff changeset	86 if (is_supplementary_character(ptr)) {
a61af66fc99e Initial load duke parents: diff changeset	87 *value = get_supplementary_character(ptr);
a61af66fc99e Initial load duke parents: diff changeset	88 return (char *)(ptr + 6);
a61af66fc99e Initial load duke parents: diff changeset	89 }
a61af66fc99e Initial load duke parents: diff changeset	90 jchar result;
a61af66fc99e Initial load duke parents: diff changeset	91 char* next_ch = next(str, &result);
a61af66fc99e Initial load duke parents: diff changeset	92 *value = result;
a61af66fc99e Initial load duke parents: diff changeset	93 return next_ch;
a61af66fc99e Initial load duke parents: diff changeset	94 }
a61af66fc99e Initial load duke parents: diff changeset	95
a61af66fc99e Initial load duke parents: diff changeset	96 // Count bytes of the form 10xxxxxx and deduct this count
a61af66fc99e Initial load duke parents: diff changeset	97 // from the total byte count. The utf8 string must be in
a61af66fc99e Initial load duke parents: diff changeset	98 // legal form which has been verified in the format checker.
a61af66fc99e Initial load duke parents: diff changeset	99 int UTF8::unicode_length(const char* str, int len) {
a61af66fc99e Initial load duke parents: diff changeset	100 int num_chars = len;
a61af66fc99e Initial load duke parents: diff changeset	101 for (int i = 0; i < len; i++) {
a61af66fc99e Initial load duke parents: diff changeset	102 if ((str[i] & 0xC0) == 0x80) {
a61af66fc99e Initial load duke parents: diff changeset	103 --num_chars;
a61af66fc99e Initial load duke parents: diff changeset	104 }
a61af66fc99e Initial load duke parents: diff changeset	105 }
a61af66fc99e Initial load duke parents: diff changeset	106 return num_chars;
a61af66fc99e Initial load duke parents: diff changeset	107 }
a61af66fc99e Initial load duke parents: diff changeset	108
a61af66fc99e Initial load duke parents: diff changeset	109 // Count bytes of the utf8 string except those in form
a61af66fc99e Initial load duke parents: diff changeset	110 // 10xxxxxx which only appear in multibyte characters.
a61af66fc99e Initial load duke parents: diff changeset	111 // The utf8 string must be in legal form and has been
a61af66fc99e Initial load duke parents: diff changeset	112 // verified in the format checker.
a61af66fc99e Initial load duke parents: diff changeset	113 int UTF8::unicode_length(const char* str) {
a61af66fc99e Initial load duke parents: diff changeset	114 int num_chars = 0;
a61af66fc99e Initial load duke parents: diff changeset	115 for (const char* p = str; *p; p++) {
a61af66fc99e Initial load duke parents: diff changeset	116 if (((*p) & 0xC0) != 0x80) {
a61af66fc99e Initial load duke parents: diff changeset	117 num_chars++;
a61af66fc99e Initial load duke parents: diff changeset	118 }
a61af66fc99e Initial load duke parents: diff changeset	119 }
a61af66fc99e Initial load duke parents: diff changeset	120 return num_chars;
a61af66fc99e Initial load duke parents: diff changeset	121 }
a61af66fc99e Initial load duke parents: diff changeset	122
a61af66fc99e Initial load duke parents: diff changeset	123 // Writes a jchar a utf8 and returns the end
a61af66fc99e Initial load duke parents: diff changeset	124 static u_char* utf8_write(u_char* base, jchar ch) {
a61af66fc99e Initial load duke parents: diff changeset	125 if ((ch != 0) && (ch <=0x7f)) {
a61af66fc99e Initial load duke parents: diff changeset	126 base[0] = (u_char) ch;
a61af66fc99e Initial load duke parents: diff changeset	127 return base + 1;
a61af66fc99e Initial load duke parents: diff changeset	128 }
a61af66fc99e Initial load duke parents: diff changeset	129
a61af66fc99e Initial load duke parents: diff changeset	130 if (ch <= 0x7FF) {
a61af66fc99e Initial load duke parents: diff changeset	131 /* 11 bits or less. */
a61af66fc99e Initial load duke parents: diff changeset	132 unsigned char high_five = ch >> 6;
a61af66fc99e Initial load duke parents: diff changeset	133 unsigned char low_six = ch & 0x3F;
a61af66fc99e Initial load duke parents: diff changeset	134 base[0] = high_five \| 0xC0; /* 110xxxxx */
a61af66fc99e Initial load duke parents: diff changeset	135 base[1] = low_six \| 0x80; /* 10xxxxxx */
a61af66fc99e Initial load duke parents: diff changeset	136 return base + 2;
a61af66fc99e Initial load duke parents: diff changeset	137 }
a61af66fc99e Initial load duke parents: diff changeset	138 /* possibly full 16 bits. */
a61af66fc99e Initial load duke parents: diff changeset	139 char high_four = ch >> 12;
a61af66fc99e Initial load duke parents: diff changeset	140 char mid_six = (ch >> 6) & 0x3F;
a61af66fc99e Initial load duke parents: diff changeset	141 char low_six = ch & 0x3f;
a61af66fc99e Initial load duke parents: diff changeset	142 base[0] = high_four \| 0xE0; /* 1110xxxx */
a61af66fc99e Initial load duke parents: diff changeset	143 base[1] = mid_six \| 0x80; /* 10xxxxxx */
a61af66fc99e Initial load duke parents: diff changeset	144 base[2] = low_six \| 0x80; /* 10xxxxxx */
a61af66fc99e Initial load duke parents: diff changeset	145 return base + 3;
a61af66fc99e Initial load duke parents: diff changeset	146 }
a61af66fc99e Initial load duke parents: diff changeset	147
a61af66fc99e Initial load duke parents: diff changeset	148 void UTF8::convert_to_unicode(const char* utf8_str, jchar* unicode_str, int unicode_length) {
a61af66fc99e Initial load duke parents: diff changeset	149 unsigned char ch;
6972 bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	150 const char *ptr = utf8_str;
0 a61af66fc99e Initial load duke parents: diff changeset	151 int index = 0;
a61af66fc99e Initial load duke parents: diff changeset	152
a61af66fc99e Initial load duke parents: diff changeset	153 /* ASCII case loop optimization */
a61af66fc99e Initial load duke parents: diff changeset	154 for (; index < unicode_length; index++) {
a61af66fc99e Initial load duke parents: diff changeset	155 if((ch = ptr[0]) > 0x7F) { break; }
a61af66fc99e Initial load duke parents: diff changeset	156 unicode_str[index] = ch;
a61af66fc99e Initial load duke parents: diff changeset	157 ptr = (const char *)(ptr + 1);
a61af66fc99e Initial load duke parents: diff changeset	158 }
a61af66fc99e Initial load duke parents: diff changeset	159
a61af66fc99e Initial load duke parents: diff changeset	160 for (; index < unicode_length; index++) {
a61af66fc99e Initial load duke parents: diff changeset	161 ptr = UTF8::next(ptr, &unicode_str[index]);
a61af66fc99e Initial load duke parents: diff changeset	162 }
a61af66fc99e Initial load duke parents: diff changeset	163 }
a61af66fc99e Initial load duke parents: diff changeset	164
6972 bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	165 // returns the quoted ascii length of a 0-terminated utf8 string
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	166 int UTF8::quoted_ascii_length(const char* utf8_str, int utf8_length) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	167 const char *ptr = utf8_str;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	168 const char* end = ptr + utf8_length;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	169 int result = 0;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	170 while (ptr < end) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	171 jchar c;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	172 ptr = UTF8::next(ptr, &c);
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	173 if (c >= 32 && c < 127) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	174 result++;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	175 } else {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	176 result += 6;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	177 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	178 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	179 return result;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	180 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	181
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	182 // converts a utf8 string to quoted ascii
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	183 void UTF8::as_quoted_ascii(const char* utf8_str, char* buf, int buflen) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	184 const char *ptr = utf8_str;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	185 char* p = buf;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	186 char* end = buf + buflen;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	187 while (*ptr != '\0') {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	188 jchar c;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	189 ptr = UTF8::next(ptr, &c);
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	190 if (c >= 32 && c < 127) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	191 if (p + 1 >= end) break; // string is truncated
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	192 *p++ = (char)c;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	193 } else {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	194 if (p + 6 >= end) break; // string is truncated
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	195 sprintf(p, "\\u%04x", c);
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	196 p += 6;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	197 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	198 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	199 *p = '\0';
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	200 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	201
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	202
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	203 const char* UTF8::from_quoted_ascii(const char* quoted_ascii_str) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	204 const char *ptr = quoted_ascii_str;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	205 char* result = NULL;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	206 while (*ptr != '\0') {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	207 char c = *ptr;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	208 if (c < 32 \|\| c >= 127) break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	209 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	210 if (*ptr == '\0') {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	211 // nothing to do so return original string
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	212 return quoted_ascii_str;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	213 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	214 // everything up to this point was ok.
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	215 int length = ptr - quoted_ascii_str;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	216 char* buffer = NULL;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	217 for (int round = 0; round < 2; round++) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	218 while (*ptr != '\0') {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	219 if (*ptr != '\\') {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	220 if (buffer != NULL) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	221 buffer[length] = *ptr;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	222 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	223 length++;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	224 } else {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	225 switch (ptr[1]) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	226 case 'u': {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	227 ptr += 2;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	228 jchar value=0;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	229 for (int i=0; i<4; i++) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	230 char c = *ptr++;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	231 switch (c) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	232 case '0': case '1': case '2': case '3': case '4':
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	233 case '5': case '6': case '7': case '8': case '9':
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	234 value = (value << 4) + c - '0';
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	235 break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	236 case 'a': case 'b': case 'c':
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	237 case 'd': case 'e': case 'f':
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	238 value = (value << 4) + 10 + c - 'a';
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	239 break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	240 case 'A': case 'B': case 'C':
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	241 case 'D': case 'E': case 'F':
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	242 value = (value << 4) + 10 + c - 'A';
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	243 break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	244 default:
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	245 ShouldNotReachHere();
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	246 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	247 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	248 if (buffer == NULL) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	249 char utf8_buffer[4];
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	250 char* next = (char)utf8_write((u_char)utf8_buffer, value);
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	251 length += next - utf8_buffer;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	252 } else {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	253 char* next = (char)utf8_write((u_char)&buffer[length], value);
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	254 length += next - &buffer[length];
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	255 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	256 break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	257 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	258 case 't': if (buffer != NULL) buffer[length] = '\t'; ptr += 2; length++; break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	259 case 'n': if (buffer != NULL) buffer[length] = '\n'; ptr += 2; length++; break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	260 case 'r': if (buffer != NULL) buffer[length] = '\r'; ptr += 2; length++; break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	261 case 'f': if (buffer != NULL) buffer[length] = '\f'; ptr += 2; length++; break;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	262 default:
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	263 ShouldNotReachHere();
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	264 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	265 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	266 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	267 if (round == 0) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	268 buffer = NEW_RESOURCE_ARRAY(char, length + 1);
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	269 ptr = quoted_ascii_str;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	270 } else {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	271 buffer[length] = '\0';
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	272 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	273 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	274 return buffer;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	275 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	276
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	277
0 a61af66fc99e Initial load duke parents: diff changeset	278 // Returns NULL if 'c' it not found. This only works as long
a61af66fc99e Initial load duke parents: diff changeset	279 // as 'c' is an ASCII character
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	280 const jbyte* UTF8::strrchr(const jbyte* base, int length, jbyte c) {
0 a61af66fc99e Initial load duke parents: diff changeset	281 assert(length >= 0, "sanity check");
a61af66fc99e Initial load duke parents: diff changeset	282 assert(c >= 0, "does not work for non-ASCII characters");
a61af66fc99e Initial load duke parents: diff changeset	283 // Skip backwards in string until 'c' is found or end is reached
a61af66fc99e Initial load duke parents: diff changeset	284 while(--length >= 0 && base[length] != c);
a61af66fc99e Initial load duke parents: diff changeset	285 return (length < 0) ? NULL : &base[length];
a61af66fc99e Initial load duke parents: diff changeset	286 }
a61af66fc99e Initial load duke parents: diff changeset	287
2177 3582bf76420e 6990754: Use native memory and reference counting to implement SymbolTable coleenp parents: 1972 diff changeset	288 bool UTF8::equal(const jbyte* base1, int length1, const jbyte* base2, int length2) {
0 a61af66fc99e Initial load duke parents: diff changeset	289 // Length must be the same
a61af66fc99e Initial load duke parents: diff changeset	290 if (length1 != length2) return false;
a61af66fc99e Initial load duke parents: diff changeset	291 for (int i = 0; i < length1; i++) {
a61af66fc99e Initial load duke parents: diff changeset	292 if (base1[i] != base2[i]) return false;
a61af66fc99e Initial load duke parents: diff changeset	293 }
a61af66fc99e Initial load duke parents: diff changeset	294 return true;
a61af66fc99e Initial load duke parents: diff changeset	295 }
a61af66fc99e Initial load duke parents: diff changeset	296
a61af66fc99e Initial load duke parents: diff changeset	297 bool UTF8::is_supplementary_character(const unsigned char* str) {
a61af66fc99e Initial load duke parents: diff changeset	298 return ((str[0] & 0xFF) == 0xED) && ((str[1] & 0xF0) == 0xA0) && ((str[2] & 0xC0) == 0x80)
a61af66fc99e Initial load duke parents: diff changeset	299 && ((str[3] & 0xFF) == 0xED) && ((str[4] & 0xF0) == 0xB0) && ((str[5] & 0xC0) == 0x80);
a61af66fc99e Initial load duke parents: diff changeset	300 }
a61af66fc99e Initial load duke parents: diff changeset	301
a61af66fc99e Initial load duke parents: diff changeset	302 jint UTF8::get_supplementary_character(const unsigned char* str) {
a61af66fc99e Initial load duke parents: diff changeset	303 return 0x10000 + ((str[1] & 0x0f) << 16) + ((str[2] & 0x3f) << 10)
a61af66fc99e Initial load duke parents: diff changeset	304 + ((str[4] & 0x0f) << 6) + (str[5] & 0x3f);
a61af66fc99e Initial load duke parents: diff changeset	305 }
a61af66fc99e Initial load duke parents: diff changeset	306
a61af66fc99e Initial load duke parents: diff changeset	307
a61af66fc99e Initial load duke parents: diff changeset	308 //-------------------------------------------------------------------------------------
a61af66fc99e Initial load duke parents: diff changeset	309
a61af66fc99e Initial load duke parents: diff changeset	310
a61af66fc99e Initial load duke parents: diff changeset	311 int UNICODE::utf8_size(jchar c) {
a61af66fc99e Initial load duke parents: diff changeset	312 if ((0x0001 <= c) && (c <= 0x007F)) return 1;
a61af66fc99e Initial load duke parents: diff changeset	313 if (c <= 0x07FF) return 2;
a61af66fc99e Initial load duke parents: diff changeset	314 return 3;
a61af66fc99e Initial load duke parents: diff changeset	315 }
a61af66fc99e Initial load duke parents: diff changeset	316
a61af66fc99e Initial load duke parents: diff changeset	317 int UNICODE::utf8_length(jchar* base, int length) {
a61af66fc99e Initial load duke parents: diff changeset	318 int result = 0;
a61af66fc99e Initial load duke parents: diff changeset	319 for (int index = 0; index < length; index++) {
a61af66fc99e Initial load duke parents: diff changeset	320 jchar c = base[index];
a61af66fc99e Initial load duke parents: diff changeset	321 if ((0x0001 <= c) && (c <= 0x007F)) result += 1;
a61af66fc99e Initial load duke parents: diff changeset	322 else if (c <= 0x07FF) result += 2;
a61af66fc99e Initial load duke parents: diff changeset	323 else result += 3;
a61af66fc99e Initial load duke parents: diff changeset	324 }
a61af66fc99e Initial load duke parents: diff changeset	325 return result;
a61af66fc99e Initial load duke parents: diff changeset	326 }
a61af66fc99e Initial load duke parents: diff changeset	327
a61af66fc99e Initial load duke parents: diff changeset	328 char* UNICODE::as_utf8(jchar* base, int length) {
a61af66fc99e Initial load duke parents: diff changeset	329 int utf8_len = utf8_length(base, length);
a61af66fc99e Initial load duke parents: diff changeset	330 u_char* result = NEW_RESOURCE_ARRAY(u_char, utf8_len + 1);
a61af66fc99e Initial load duke parents: diff changeset	331 u_char* p = result;
a61af66fc99e Initial load duke parents: diff changeset	332 for (int index = 0; index < length; index++) {
a61af66fc99e Initial load duke parents: diff changeset	333 p = utf8_write(p, base[index]);
a61af66fc99e Initial load duke parents: diff changeset	334 }
a61af66fc99e Initial load duke parents: diff changeset	335 *p = '\0';
a61af66fc99e Initial load duke parents: diff changeset	336 assert(p == &result[utf8_len], "length prediction must be correct");
a61af66fc99e Initial load duke parents: diff changeset	337 return (char*) result;
a61af66fc99e Initial load duke parents: diff changeset	338 }
a61af66fc99e Initial load duke parents: diff changeset	339
a61af66fc99e Initial load duke parents: diff changeset	340 char* UNICODE::as_utf8(jchar* base, int length, char* buf, int buflen) {
a61af66fc99e Initial load duke parents: diff changeset	341 u_char* p = (u_char*)buf;
a61af66fc99e Initial load duke parents: diff changeset	342 u_char* end = (u_char*)buf + buflen;
a61af66fc99e Initial load duke parents: diff changeset	343 for (int index = 0; index < length; index++) {
a61af66fc99e Initial load duke parents: diff changeset	344 jchar c = base[index];
a61af66fc99e Initial load duke parents: diff changeset	345 if (p + utf8_size(c) >= end) break; // string is truncated
a61af66fc99e Initial load duke parents: diff changeset	346 p = utf8_write(p, base[index]);
a61af66fc99e Initial load duke parents: diff changeset	347 }
a61af66fc99e Initial load duke parents: diff changeset	348 *p = '\0';
a61af66fc99e Initial load duke parents: diff changeset	349 return buf;
a61af66fc99e Initial load duke parents: diff changeset	350 }
a61af66fc99e Initial load duke parents: diff changeset	351
a61af66fc99e Initial load duke parents: diff changeset	352 void UNICODE::convert_to_utf8(const jchar* base, int length, char* utf8_buffer) {
a61af66fc99e Initial load duke parents: diff changeset	353 for(int index = 0; index < length; index++) {
a61af66fc99e Initial load duke parents: diff changeset	354 utf8_buffer = (char)utf8_write((u_char)utf8_buffer, base[index]);
a61af66fc99e Initial load duke parents: diff changeset	355 }
a61af66fc99e Initial load duke parents: diff changeset	356 *utf8_buffer = '\0';
a61af66fc99e Initial load duke parents: diff changeset	357 }
6972 bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	358
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	359 // returns the quoted ascii length of a unicode string
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	360 int UNICODE::quoted_ascii_length(jchar* base, int length) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	361 int result = 0;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	362 for (int i = 0; i < length; i++) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	363 jchar c = base[i];
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	364 if (c >= 32 && c < 127) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	365 result++;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	366 } else {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	367 result += 6;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	368 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	369 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	370 return result;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	371 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	372
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	373 // converts a utf8 string to quoted ascii
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	374 void UNICODE::as_quoted_ascii(const jchar* base, int length, char* buf, int buflen) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	375 char* p = buf;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	376 char* end = buf + buflen;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	377 for (int index = 0; index < length; index++) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	378 jchar c = base[index];
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	379 if (c >= 32 && c < 127) {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	380 if (p + 1 >= end) break; // string is truncated
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	381 *p++ = (char)c;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	382 } else {
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	383 if (p + 6 >= end) break; // string is truncated
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	384 sprintf(p, "\\u%04x", c);
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	385 p += 6;
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	386 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	387 }
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	388 *p = '\0';
bd7a7ce2e264 6830717: replay of compilations would help with debugging minqi parents: 2426 diff changeset	389 }

Mercurial > hg > truffle

annotate src/share/vm/utilities/utf8.cpp @ 8710:9058789475af