285 lines
5.9 KiB
C++
285 lines
5.9 KiB
C++
// natCharacter.cc - Native part of Character class.
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/* Copyright (C) 1998, 1999 Cygnus Solutions
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <cni.h>
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#include <jvm.h>
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#include <java/lang/Character.h>
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#include <java-chartables.h>
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#define asize(x) ((sizeof (x)) / sizeof (x[0]))
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static jchar
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to_lower_title (jchar ch)
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{
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for (unsigned int i = 0; i < asize (title_to_upper_table); ++i)
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{
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// We can assume that the entries in the two tables are
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// parallel. This is checked in the script.
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if (title_to_upper_table[i][1] == ch
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|| title_to_upper_table[i][0] == ch)
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return title_to_lower_table[i][1];
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}
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return ch;
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}
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static jchar
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to_upper_title (jchar ch)
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{
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for (unsigned int i = 0; i < asize (title_to_lower_table); ++i)
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{
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// We can assume that the entries in the two tables are
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// parallel. This is checked in the script.
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if (title_to_lower_table[i][1] == ch
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|| title_to_lower_table[i][0] == ch)
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return title_to_upper_table[i][1];
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}
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return ch;
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}
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jboolean
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java::lang::Character::isTitleCase (jchar ch)
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{
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for (unsigned int i = 0; i < asize (title_to_lower_table); ++i)
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{
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if (title_to_lower_table[i][0] == ch)
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return true;
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}
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return false;
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}
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jchar
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java::lang::Character::toTitleCase (jchar ch)
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{
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// Both titlecase mapping tables have the same length. This is
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// checked in the chartables script.
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for (unsigned int i = 0; i < asize (title_to_lower_table); ++i)
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{
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if (title_to_lower_table[i][0] == ch)
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return ch;
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if (title_to_lower_table[i][1] == ch)
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return title_to_lower_table[i][0];
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if (title_to_upper_table[i][1] == ch)
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return title_to_upper_table[i][0];
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}
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return toUpperCase (ch);
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}
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#ifdef COMPACT_CHARACTER
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static int
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table_search (const jchar table[][2], int table_len, jchar ch)
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{
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int low, high, i, old;
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low = 0;
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high = table_len;
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i = high / 2;
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while (true)
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{
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if (ch < table[i][0])
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high = i;
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else if (ch > table[i][1])
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low = i;
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else
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return i;
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old = i;
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i = (high + low) / 2;
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if (i == old)
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break;
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}
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return -1;
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}
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jint
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java::lang::Character::digit_value (jchar ch)
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{
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int index = table_search (digit_table, asize (digit_table), ch);
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if (index == -1)
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return -1;
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jchar base = digit_table[index][0];
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// Tamil doesn't have a digit `0'. So we special-case it here.
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if (base == TAMIL_DIGIT_ONE)
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return ch - base + 1;
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return ch - base;
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}
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jint
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java::lang::Character::getNumericValue (jchar ch)
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{
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jint d = digit (ch, 36);
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if (d != -1)
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return d;
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for (unsigned int i = 0; i < asize (numeric_table); ++i)
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{
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if (numeric_table[i] == ch)
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return numeric_value[i];
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}
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return -1;
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}
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jint
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java::lang::Character::getType (jchar ch)
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{
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int index = table_search (all_table, asize (all_table), ch);
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if (index != -1)
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return category_table[index];
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return UNASSIGNED;
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}
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jboolean
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java::lang::Character::isLowerCase (jchar ch)
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{
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if (ch >= 0x2000 && ch <= 0x2fff)
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return false;
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if (table_search (lower_case_table, asize (lower_case_table), ch) != -1)
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return true;
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int low, high, i, old;
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low = 0;
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high = asize (lower_anomalous_table);
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i = high / 2;
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while (true)
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{
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if (ch < lower_anomalous_table[i])
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high = i;
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else if (ch > lower_anomalous_table[i])
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low = i;
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else
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return true;
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old = i;
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i = (high + low) / 2;
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if (i == old)
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break;
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}
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return false;
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}
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jboolean
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java::lang::Character::isSpaceChar (jchar ch)
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{
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return table_search (space_table, asize (space_table), ch) != -1;
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}
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jboolean
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java::lang::Character::isUpperCase (jchar ch)
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{
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if (ch >= 0x2000 && ch <= 0x2fff)
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return false;
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return table_search (upper_case_table, asize (upper_case_table), ch) != -1;
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}
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jchar
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java::lang::Character::toLowerCase (jchar ch)
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{
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int index = table_search (upper_case_table, asize (upper_case_table), ch);
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if (index == -1)
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return to_lower_title (ch);
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return (jchar) (ch - upper_case_table[index][0]
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+ upper_case_map_table[index]);
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}
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jchar
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java::lang::Character::toUpperCase (jchar ch)
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{
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int index = table_search (lower_case_table, asize (lower_case_table), ch);
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if (index == -1)
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return to_upper_title (ch);
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return (jchar) (ch - lower_case_table[index][0]
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+ lower_case_map_table[index]);
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}
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#else /* COMPACT_CHARACTER */
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jint
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java::lang::Character::digit_value (jchar ch)
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{
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if (type_table[ch] == DECIMAL_DIGIT_NUMBER)
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return attribute_table[ch];
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return -1;
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}
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jint
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java::lang::Character::getNumericValue (jchar ch)
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{
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jint d = digit (ch, 36);
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if (d != -1)
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return d;
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// Some characters require two attributes. We special-case them here.
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if (ch >= ROMAN_START && ch <= ROMAN_END)
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return secondary_attribute_table[ch - ROMAN_START];
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if (type_table[ch] == LETTER_NUMBER || type_table[ch] == OTHER_NUMBER)
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return attribute_table[ch];
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return -1;
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}
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jint
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java::lang::Character::getType (jchar ch)
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{
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return type_table[ch];
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}
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jboolean
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java::lang::Character::isLowerCase (jchar ch)
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{
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if (ch >= 0x2000 && ch <= 0x2fff)
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return false;
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return type_table[ch] == LOWERCASE_LETTER;
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}
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jboolean
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java::lang::Character::isSpaceChar (jchar ch)
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{
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return (type_table[ch] == SPACE_SEPARATOR
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|| type_table[ch] == LINE_SEPARATOR
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|| type_table[ch] == PARAGRAPH_SEPARATOR);
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}
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jboolean
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java::lang::Character::isUpperCase (jchar ch)
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{
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if (ch >= 0x2000 && ch <= 0x2fff)
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return false;
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return type_table[ch] == UPPERCASE_LETTER;
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}
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jchar
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java::lang::Character::toLowerCase (jchar ch)
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{
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if (type_table[ch] == UPPERCASE_LETTER)
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return attribute_table[ch];
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return to_lower_title (ch);
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}
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jchar
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java::lang::Character::toUpperCase (jchar ch)
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{
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if (type_table[ch] == LOWERCASE_LETTER)
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return attribute_table[ch];
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return to_upper_title (ch);
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}
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#endif /* COMPACT_CHARACTER */
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