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Improve tests and behavior of string.indexOf operations.

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This commit is contained in:
James Roseborough
2013-01-27 18:42:21 +00:00
parent 1f89f30239
commit cef619cb40
2 changed files with 134 additions and 9 deletions
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16
src/core/org/luaj/vm2/LuaString.java
View File

@@ -501,8 +501,8 @@ public class LuaString extends LuaValue {
* @return index of first match found, or -1 if not found.
*/
public int indexOf( byte b, int start ) {
for ( int i=0, j=m_offset+start; i < m_length; ++i ) {
if ( m_bytes[j++] == b )
for ( int i=start; i < m_length; ++i ) {
if ( m_bytes[m_offset+i] == b )
return i;
}
return -1;
@@ -517,10 +517,9 @@ public class LuaString extends LuaValue {
public int indexOf( LuaString s, int start ) {
final int slen = s.length();
final int limit = m_length - slen;
for ( int i = start; i <= limit; ++i ) {
if ( equals( m_bytes, m_offset + i, s.m_bytes, s.m_offset, slen ) ) {
for ( int i=start; i <= limit; ++i ) {
if ( equals( m_bytes, m_offset+i, s.m_bytes, s.m_offset, slen ) )
return i;
}
}
return -1;
}
@@ -532,11 +531,10 @@ public class LuaString extends LuaValue {
*/
public int lastIndexOf( LuaString s ) {
final int slen = s.length();
final int limit = m_offset + m_length - slen;
for ( int i = limit; i >= m_offset; --i ) {
if ( equals( m_bytes, i, s.m_bytes, s.m_offset, slen ) ) {
final int limit = m_length - slen;
for ( int i=limit; i >= 0; --i ) {
if ( equals( m_bytes, m_offset+i, s.m_bytes, s.m_offset, slen ) )
return i;
}
}
return -1;
}

127
test/junit/org/luaj/vm2/StringTest.java
View File

@@ -222,4 +222,131 @@ public class StringTest extends TestCase {
assertFalse(sub1 == sub2);
assertFalse(src.m_bytes == sub1.m_bytes);
}
public void testIndexOfByteInSubstring() {
LuaString str = LuaString.valueOf("abcdef:ghi");
LuaString sub = str.substring(2, 10);
assertEquals(10, str.m_length);
assertEquals(8, sub.m_length);
assertEquals(0, str.m_offset);
assertEquals(2, sub.m_offset);
assertEquals(6, str.indexOf((byte) ':', 0));
assertEquals(6, str.indexOf((byte) ':', 2));
assertEquals(6, str.indexOf((byte) ':', 6));
assertEquals(-1, str.indexOf((byte) ':', 7));
assertEquals(-1, str.indexOf((byte) ':', 9));
assertEquals(9, str.indexOf((byte) 'i', 0));
assertEquals(9, str.indexOf((byte) 'i', 2));
assertEquals(9, str.indexOf((byte) 'i', 9));
assertEquals(-1, str.indexOf((byte) 'z', 0));
assertEquals(-1, str.indexOf((byte) 'z', 2));
assertEquals(-1, str.indexOf((byte) 'z', 9));
assertEquals(4, sub.indexOf((byte) ':', 0));
assertEquals(4, sub.indexOf((byte) ':', 2));
assertEquals(4, sub.indexOf((byte) ':', 4));
assertEquals(-1, sub.indexOf((byte) ':', 5));
assertEquals(-1, sub.indexOf((byte) ':', 7));
assertEquals(7, sub.indexOf((byte) 'i', 0));
assertEquals(7, sub.indexOf((byte) 'i', 2));
assertEquals(7, sub.indexOf((byte) 'i', 7));
assertEquals(-1, sub.indexOf((byte) 'z', 0));
assertEquals(-1, sub.indexOf((byte) 'z', 2));
assertEquals(-1, sub.indexOf((byte) 'z', 7));
}
public void testIndexOfPatternInSubstring() {
LuaString str = LuaString.valueOf("abcdef:ghi");
LuaString sub = str.substring(2, 10);
assertEquals(10, str.m_length);
assertEquals(8, sub.m_length);
assertEquals(0, str.m_offset);
assertEquals(2, sub.m_offset);
LuaString pat = LuaString.valueOf(":");
LuaString i = LuaString.valueOf("i");
LuaString xyz = LuaString.valueOf("xyz");
assertEquals(6, str.indexOf(pat, 0));
assertEquals(6, str.indexOf(pat, 2));
assertEquals(6, str.indexOf(pat, 6));
assertEquals(-1, str.indexOf(pat, 7));
assertEquals(-1, str.indexOf(pat, 9));
assertEquals(9, str.indexOf(i, 0));
assertEquals(9, str.indexOf(i, 2));
assertEquals(9, str.indexOf(i, 9));
assertEquals(-1, str.indexOf(xyz, 0));
assertEquals(-1, str.indexOf(xyz, 2));
assertEquals(-1, str.indexOf(xyz, 9));
assertEquals(4, sub.indexOf(pat, 0));
assertEquals(4, sub.indexOf(pat, 2));
assertEquals(4, sub.indexOf(pat, 4));
assertEquals(-1, sub.indexOf(pat, 5));
assertEquals(-1, sub.indexOf(pat, 7));
assertEquals(7, sub.indexOf(i, 0));
assertEquals(7, sub.indexOf(i, 2));
assertEquals(7, sub.indexOf(i, 7));
assertEquals(-1, sub.indexOf(xyz, 0));
assertEquals(-1, sub.indexOf(xyz, 2));
assertEquals(-1, sub.indexOf(xyz, 7));
}
public void testLastIndexOfPatternInSubstring() {
LuaString str = LuaString.valueOf("abcdef:ghi");
LuaString sub = str.substring(2, 10);
assertEquals(10, str.m_length);
assertEquals(8, sub.m_length);
assertEquals(0, str.m_offset);
assertEquals(2, sub.m_offset);
LuaString pat = LuaString.valueOf(":");
LuaString i = LuaString.valueOf("i");
LuaString xyz = LuaString.valueOf("xyz");
assertEquals(6, str.lastIndexOf(pat));
assertEquals(9, str.lastIndexOf(i));
assertEquals(-1, str.lastIndexOf(xyz));
assertEquals(4, sub.lastIndexOf(pat));
assertEquals(7, sub.lastIndexOf(i));
assertEquals(-1, sub.lastIndexOf(xyz));
}
public void testIndexOfAnyInSubstring() {
LuaString str = LuaString.valueOf("abcdef:ghi");
LuaString sub = str.substring(2, 10);
assertEquals(10, str.m_length);
assertEquals(8, sub.m_length);
assertEquals(0, str.m_offset);
assertEquals(2, sub.m_offset);
LuaString ghi = LuaString.valueOf("ghi");
LuaString ihg = LuaString.valueOf("ihg");
LuaString ijk = LuaString.valueOf("ijk");
LuaString kji= LuaString.valueOf("kji");
LuaString xyz = LuaString.valueOf("xyz");
LuaString ABCdEFGHIJKL = LuaString.valueOf("ABCdEFGHIJKL");
LuaString EFGHIJKL = ABCdEFGHIJKL.substring(4, 12);
LuaString CdEFGHIJ = ABCdEFGHIJKL.substring(2, 10);
assertEquals(4, EFGHIJKL.m_offset);
assertEquals(2, CdEFGHIJ.m_offset);
assertEquals(7, str.indexOfAny(ghi));
assertEquals(7, str.indexOfAny(ihg));
assertEquals(9, str.indexOfAny(ijk));
assertEquals(9, str.indexOfAny(kji));
assertEquals(-1, str.indexOfAny(xyz));
assertEquals(3, str.indexOfAny(CdEFGHIJ));
assertEquals(-1, str.indexOfAny(EFGHIJKL));
assertEquals(5, sub.indexOfAny(ghi));
assertEquals(5, sub.indexOfAny(ihg));
assertEquals(7, sub.indexOfAny(ijk));
assertEquals(7, sub.indexOfAny(kji));
assertEquals(-1, sub.indexOfAny(xyz));
assertEquals(1, sub.indexOfAny(CdEFGHIJ));
assertEquals(-1, sub.indexOfAny(EFGHIJKL));
}
}