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some minor improvements

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This commit is contained in:
ceriel 1988-04-13 13:05:38 +00:00
parent 24d7026a7a
commit e53d23a925
1 changed files with 7 additions and 7 deletions
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14
modules/src/idf/idf_pkg.body
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@ -10,7 +10,7 @@
#define HASHSIZE 256 /* size of hashtable, must be a power of 2 */ #define HASHSIZE 256 /* size of hashtable, must be a power of 2 */
#ifndef IDF_HSIZE #ifndef IDF_HSIZE
#define IDF_HSIZE 64 /* # of significant characters for hashing. #define IDF_HSIZE 16 /* # of significant characters for hashing.
This is NOT the number of significant This is NOT the number of significant
characters! characters!
*/ */
@ -20,9 +20,9 @@
#define HASH_C 153 /* Knuth's c */ #define HASH_C 153 /* Knuth's c */
#define HASHMASK (HASHSIZE-1) /* since it is a power of 2 */ #define HASHMASK (HASHSIZE-1) /* since it is a power of 2 */
#define STARTHASH() (0) #define STARTHASH(hs) (hs = 0)
#define ENHASH(hs,ch,hm) (hs + (ch ^ hm)) #define ENHASH(hs,ch,hm) (hs += (ch ^ hm))
#define STOPHASH(hs) (hs & HASHMASK) #define STOPHASH(hs) (hs &= HASHMASK)
static char hmask[IDF_HSIZE]; static char hmask[IDF_HSIZE];
@ -106,11 +106,11 @@ str2idf(tg, cpy)
register int hash; register int hash;
int size; int size;
hash = STARTHASH(); STARTHASH(hash);
while (*cp && phm < &hmask[IDF_HSIZE]) { while (*cp && phm < &hmask[IDF_HSIZE]) {
hash = ENHASH(hash, *cp++, *phm++); ENHASH(hash, *cp++, *phm++);
} }
hash = STOPHASH(hash); STOPHASH(hash);
while (*cp++) /* nothing. Find end of string */ ; while (*cp++) /* nothing. Find end of string */ ;
size = cp - tg; size = cp - tg;