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comparison src/symbols.c @ 24:4103f0995bd7 r19-15b95

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Import from CVS: tag r19-15b95
author cvs
date Mon, 13 Aug 2007 08:51:03 +0200
parents 859a2309aef8
children 131b0175ea99
comparison
equal deleted inserted replaced
23:0edd3412f124 24:4103f0995bd7
326 break; 326 break;
327 } 327 }
328 return (make_int (hash)); 328 return (make_int (hash));
329 } 329 }
330 330
331 #if 0 /* Emacs 19.34 */
331 int 332 int
332 hash_string (CONST Bufbyte *ptr, Bytecount len) 333 hash_string (CONST Bufbyte *ptr, Bytecount len)
333 { 334 {
334 CONST Bufbyte *p = ptr; 335 CONST Bufbyte *p = ptr;
335 CONST Bufbyte *end = p + len; 336 CONST Bufbyte *end = p + len;
339 while (p != end) 340 while (p != end)
340 { 341 {
341 c = *p++; 342 c = *p++;
342 if (c >= 0140) c -= 40; 343 if (c >= 0140) c -= 40;
343 hash = ((hash<<3) + (hash>>28) + c); 344 hash = ((hash<<3) + (hash>>28) + c);
345 }
346 return hash & 07777777777;
347 }
348 #endif
349
350 /* derived from hashpjw, Dragon Book P436. */
351 int
352 hash_string (CONST Bufbyte *ptr, Bytecount len)
353 {
354 CONST Bufbyte *p = ptr;
355 int hash = 0, g;
356 Bytecount count = len;
357
358 while (count-- > 0)
359 {
360 hash = (hash << 4) + *p++;
361 if (g = (hash & 0xf0000000)) {
362 hash = hash ^ (g >> 24);
363 hash = hash ^ g;
364 }
344 } 365 }
345 return hash & 07777777777; 366 return hash & 07777777777;
346 } 367 }
347 368
348 void 369 void