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increment internal tile values by one so strings can be null-terminated

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This commit is contained in:
ehouse 2007-02-14 15:17:00 +00:00
parent dc204c9aba
commit 326ecb00f4
1 changed files with 11 additions and 7 deletions
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18
dawg/dict2dawg.cpp
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@ -755,13 +755,13 @@ writeOutStartNode( const char* startNodeOut, int firstRootChildOffset )
static void
makeTableHash( void )
{
int i;
int ii;
FILE* TABLEFILE = fopen( gTableFile, "r" );
if ( NULL == TABLEFILE ) {
ERROR_EXIT( "unable to open %s\n", gTableFile );
}
for ( i = 0; ; ++i ) {
for ( ii = 0; ; ++ii ) {
int ch = getc(TABLEFILE);
if ( ch == EOF ) {
break;
@ -777,17 +777,20 @@ makeTableHash( void )
gRevMap.push_back(ch);
if ( ch == 0 ) { // blank
gBlankIndex = i;
gBlankIndex = ii;
// we want to increment i when blank seen since it is a
// tile value
continue;
}
// die "$0: $gTableFile too large\n"
assert( i < 64 );
assert( ii < 64 );
// die "$0: only blank (0) can be 64th char\n" ;
assert( i < 64 || ch == 0 );
assert( ii < 64 || ch == 0 );
gTableHash[ch] = i;
// Add 1 to i so no tile-strings contain 0 and we can treat as
// null-terminated. The 1 is subtracted again in
// outputNode().
gTableHash[ch] = ii + 1;
}
fclose( TABLEFILE );
@ -958,7 +961,8 @@ outputNode( Node node, int nBytes, FILE* outfile )
ERROR_EXIT( "fco not 1 or 0" );
}
unsigned char chIn5 = TrieNodeGetLetter(node);
// - 1 below reverses + 1 in makeTableHash()
unsigned char chIn5 = TrieNodeGetLetter(node) - 1;
unsigned char bits = chIn5;
if ( bits > 0x1F && nBytes == 3 ) {
ERROR_EXIT( "char %d too big", bits );