jdk8-mips64-public/hotspot: src/share/vm/utilities/utf8.cpp@e5003079dfa5 (annotated)

src/share/vm/utilities/utf8.cpp@e5003079dfa5 (annotated)

src/share/vm/utilities/utf8.cpp

Fri, 16 Aug 2013 10:06:58 -0700

author: dcubed
date: Fri, 16 Aug 2013 10:06:58 -0700
changeset 5529: e5003079dfa5
parent 4851: 8c03fc47511d
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #include "precompiled.hpp"
 #include "utilities/utf8.hpp"
 // Assume the utf8 string is in legal form and has been
 // checked in the class file parser/format checker.
 char* UTF8::next(const char* str, jchar* value) {
   unsigned const char *ptr = (const unsigned char *)str;
   unsigned char ch, ch2, ch3;
   int length = -1;              /* bad length */
   jchar result;
   switch ((ch = ptr[0]) >> 4) {
     default:
     result = ch;
     length = 1;
     break;
   case 0x8: case 0x9: case 0xA: case 0xB: case 0xF:
     /* Shouldn't happen. */
     break;
   case 0xC: case 0xD:
     /* 110xxxxx  10xxxxxx */
     if (((ch2 = ptr[1]) & 0xC0) == 0x80) {
       unsigned char high_five = ch & 0x1F;
       unsigned char low_six = ch2 & 0x3F;
       result = (high_five << 6) + low_six;
       length = 2;
       break;
     }
     break;
   case 0xE:
     /* 1110xxxx 10xxxxxx 10xxxxxx */
     if (((ch2 = ptr[1]) & 0xC0) == 0x80) {
       if (((ch3 = ptr[2]) & 0xC0) == 0x80) {
         unsigned char high_four = ch & 0x0f;
         unsigned char mid_six = ch2 & 0x3f;
         unsigned char low_six = ch3 & 0x3f;
         result = (((high_four << 6) + mid_six) << 6) + low_six;
         length = 3;
       }
     }
     break;
   } /* end of switch */
   if (length <= 0) {
     *value = ptr[0];    /* default bad result; */
     return (char*)(ptr + 1); // make progress somehow
   }
   *value = result;
   // The assert is correct but the .class file is wrong
   // assert(UNICODE::utf8_size(result) == length, "checking reverse computation");
   return (char *)(ptr + length);
 }
 char* UTF8::next_character(const char* str, jint* value) {
   unsigned const char *ptr = (const unsigned char *)str;
   /* See if it's legal supplementary character:
      11101101 1010xxxx 10xxxxxx 11101101 1011xxxx 10xxxxxx */
   if (is_supplementary_character(ptr)) {
     *value = get_supplementary_character(ptr);
     return (char *)(ptr + 6);
   }
   jchar result;
   char* next_ch = next(str, &result);
   *value = result;
   return next_ch;
 }
 // Count bytes of the form 10xxxxxx and deduct this count
 // from the total byte count.  The utf8 string must be in
 // legal form which has been verified in the format checker.
 int UTF8::unicode_length(const char* str, int len) {
   int num_chars = len;
   for (int i = 0; i < len; i++) {
     if ((str[i] & 0xC0) == 0x80) {
       --num_chars;
     }
   }
   return num_chars;
 }
 // Count bytes of the utf8 string except those in form
 // 10xxxxxx which only appear in multibyte characters.
 // The utf8 string must be in legal form and has been
 // verified in the format checker.
 int UTF8::unicode_length(const char* str) {
   int num_chars = 0;
   for (const char* p = str; *p; p++) {
     if (((*p) & 0xC0) != 0x80) {
       num_chars++;
     }
   }
   return num_chars;
 }
 // Writes a jchar a utf8 and returns the end
 static u_char* utf8_write(u_char* base, jchar ch) {
   if ((ch != 0) && (ch <=0x7f)) {
     base[0] = (u_char) ch;
     return base + 1;
   }
   if (ch <= 0x7FF) {
     /* 11 bits or less. */
     unsigned char high_five = ch >> 6;
     unsigned char low_six = ch & 0x3F;
     base[0] = high_five | 0xC0; /* 110xxxxx */
     base[1] = low_six | 0x80;   /* 10xxxxxx */
     return base + 2;
   }
   /* possibly full 16 bits. */
   char high_four = ch >> 12;
   char mid_six = (ch >> 6) & 0x3F;
   char low_six = ch & 0x3f;
   base[0] = high_four | 0xE0; /* 1110xxxx */
   base[1] = mid_six | 0x80;   /* 10xxxxxx */
   base[2] = low_six | 0x80;   /* 10xxxxxx */
   return base + 3;
 }
 void UTF8::convert_to_unicode(const char* utf8_str, jchar* unicode_str, int unicode_length) {
   unsigned char ch;
   const char *ptr = utf8_str;
   int index = 0;
   /* ASCII case loop optimization */
   for (; index < unicode_length; index++) {
     if((ch = ptr[0]) > 0x7F) { break; }
     unicode_str[index] = ch;
     ptr = (const char *)(ptr + 1);
   }
   for (; index < unicode_length; index++) {
     ptr = UTF8::next(ptr, &unicode_str[index]);
   }
 }
 // returns the quoted ascii length of a 0-terminated utf8 string
 int UTF8::quoted_ascii_length(const char* utf8_str, int utf8_length) {
   const char *ptr = utf8_str;
   const char* end = ptr + utf8_length;
   int result = 0;
   while (ptr < end) {
     jchar c;
     ptr = UTF8::next(ptr, &c);
     if (c >= 32 && c < 127) {
       result++;
     } else {
       result += 6;
     }
   }
   return result;
 }
 // converts a utf8 string to quoted ascii
 void UTF8::as_quoted_ascii(const char* utf8_str, int utf8_length, char* buf, int buflen) {
   const char *ptr = utf8_str;
   const char *utf8_end = ptr + utf8_length;
   char* p = buf;
   char* end = buf + buflen;
   while (ptr < utf8_end) {
     jchar c;
     ptr = UTF8::next(ptr, &c);
     if (c >= 32 && c < 127) {
       if (p + 1 >= end) break;      // string is truncated
       *p++ = (char)c;
     } else {
       if (p + 6 >= end) break;      // string is truncated
       sprintf(p, "\\u%04x", c);
       p += 6;
     }
   }
   assert(p < end, "sanity");
   *p = '\0';
 }
 const char* UTF8::from_quoted_ascii(const char* quoted_ascii_str) {
   const char *ptr = quoted_ascii_str;
   char* result = NULL;
   while (*ptr != '\0') {
     char c = *ptr;
     if (c < 32 || c >= 127) break;
   }
   if (*ptr == '\0') {
     // nothing to do so return original string
     return quoted_ascii_str;
   }
   // everything up to this point was ok.
   int length = ptr - quoted_ascii_str;
   char* buffer = NULL;
   for (int round = 0; round < 2; round++) {
     while (*ptr != '\0') {
       if (*ptr != '\\') {
         if (buffer != NULL) {
           buffer[length] = *ptr;
         }
         length++;
       } else {
         switch (ptr[1]) {
           case 'u': {
             ptr += 2;
             jchar value=0;
             for (int i=0; i<4; i++) {
               char c = *ptr++;
               switch (c) {
                 case '0': case '1': case '2': case '3': case '4':
                 case '5': case '6': case '7': case '8': case '9':
                   value = (value << 4) + c - '0';
                   break;
                 case 'a': case 'b': case 'c':
                 case 'd': case 'e': case 'f':
                   value = (value << 4) + 10 + c - 'a';
                   break;
                 case 'A': case 'B': case 'C':
                 case 'D': case 'E': case 'F':
                   value = (value << 4) + 10 + c - 'A';
                   break;
                 default:
                   ShouldNotReachHere();
               }
             }
             if (buffer == NULL) {
               char utf8_buffer[4];
               char* next = (char*)utf8_write((u_char*)utf8_buffer, value);
               length += next - utf8_buffer;
             } else {
               char* next = (char*)utf8_write((u_char*)&buffer[length], value);
               length += next - &buffer[length];
             }
             break;
           }
           case 't': if (buffer != NULL) buffer[length] = '\t'; ptr += 2; length++; break;
           case 'n': if (buffer != NULL) buffer[length] = '\n'; ptr += 2; length++; break;
           case 'r': if (buffer != NULL) buffer[length] = '\r'; ptr += 2; length++; break;
           case 'f': if (buffer != NULL) buffer[length] = '\f'; ptr += 2; length++; break;
           default:
             ShouldNotReachHere();
         }
       }
     }
     if (round == 0) {
       buffer = NEW_RESOURCE_ARRAY(char, length + 1);
       ptr = quoted_ascii_str;
     } else {
       buffer[length] = '\0';
     }
   }
   return buffer;
 }
 // Returns NULL if 'c' it not found. This only works as long
 // as 'c' is an ASCII character
 const jbyte* UTF8::strrchr(const jbyte* base, int length, jbyte c) {
   assert(length >= 0, "sanity check");
   assert(c >= 0, "does not work for non-ASCII characters");
   // Skip backwards in string until 'c' is found or end is reached
   while(--length >= 0 && base[length] != c);
   return (length < 0) ? NULL : &base[length];
 }
 bool UTF8::equal(const jbyte* base1, int length1, const jbyte* base2, int length2) {
   // Length must be the same
   if (length1 != length2) return false;
   for (int i = 0; i < length1; i++) {
     if (base1[i] != base2[i]) return false;
   }
   return true;
 }
 bool UTF8::is_supplementary_character(const unsigned char* str) {
   return ((str[0] & 0xFF) == 0xED) && ((str[1] & 0xF0) == 0xA0) && ((str[2] & 0xC0) == 0x80)
       && ((str[3] & 0xFF) == 0xED) && ((str[4] & 0xF0) == 0xB0) && ((str[5] & 0xC0) == 0x80);
 }
 jint UTF8::get_supplementary_character(const unsigned char* str) {
   return 0x10000 + ((str[1] & 0x0f) << 16) + ((str[2] & 0x3f) << 10)
                  + ((str[4] & 0x0f) << 6)  + (str[5] & 0x3f);
 }
 //-------------------------------------------------------------------------------------
 int UNICODE::utf8_size(jchar c) {
   if ((0x0001 <= c) && (c <= 0x007F)) return 1;
   if (c <= 0x07FF) return 2;
   return 3;
 }
 int UNICODE::utf8_length(jchar* base, int length) {
   int result = 0;
   for (int index = 0; index < length; index++) {
     jchar c = base[index];
     if ((0x0001 <= c) && (c <= 0x007F)) result += 1;
     else if (c <= 0x07FF) result += 2;
     else result += 3;
   }
   return result;
 }
 char* UNICODE::as_utf8(jchar* base, int length) {
   int utf8_len = utf8_length(base, length);
   u_char* result = NEW_RESOURCE_ARRAY(u_char, utf8_len + 1);
   u_char* p = result;
   for (int index = 0; index < length; index++) {
     p = utf8_write(p, base[index]);
   }
   *p = '\0';
   assert(p == &result[utf8_len], "length prediction must be correct");
   return (char*) result;
 }
 char* UNICODE::as_utf8(jchar* base, int length, char* buf, int buflen) {
   u_char* p = (u_char*)buf;
   u_char* end = (u_char*)buf + buflen;
   for (int index = 0; index < length; index++) {
     jchar c = base[index];
     if (p + utf8_size(c) >= end) break;      // string is truncated
     p = utf8_write(p, base[index]);
   }
   *p = '\0';
   return buf;
 }
 void UNICODE::convert_to_utf8(const jchar* base, int length, char* utf8_buffer) {
   for(int index = 0; index < length; index++) {
     utf8_buffer = (char*)utf8_write((u_char*)utf8_buffer, base[index]);
   }
   *utf8_buffer = '\0';
 }
 // returns the quoted ascii length of a unicode string
 int UNICODE::quoted_ascii_length(jchar* base, int length) {
   int result = 0;
   for (int i = 0; i < length; i++) {
     jchar c = base[i];
     if (c >= 32 && c < 127) {
       result++;
     } else {
       result += 6;
     }
   }
   return result;
 }
 // converts a utf8 string to quoted ascii
 void UNICODE::as_quoted_ascii(const jchar* base, int length, char* buf, int buflen) {
   char* p = buf;
   char* end = buf + buflen;
   for (int index = 0; index < length; index++) {
     jchar c = base[index];
     if (c >= 32 && c < 127) {
       if (p + 1 >= end) break;      // string is truncated
       *p++ = (char)c;
     } else {
       if (p + 6 >= end) break;      // string is truncated
       sprintf(p, "\\u%04x", c);
       p += 6;
     }
   }
   *p = '\0';
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/utilities/utf8.cpp@e5003079dfa5 (annotated)

src/share/vm/utilities/utf8.cpp