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9174f65e54
friends. Since names and other strings are now StrBufs in many places, code for output had to be changed. Added support for string literals to StrBuf. git-svn-id: svn://svn.cc65.org/cc65/trunk@3825 b7a2c559-68d2-44c3-8de9-860c34a00d81
77 lines
3.2 KiB
C
77 lines
3.2 KiB
C
/*****************************************************************************/
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/* */
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/* hashstr.c */
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/* */
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/* Hash function for strings */
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/* */
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/* */
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/* */
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/* (C) 1998-2008 Ullrich von Bassewitz */
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/* Roemerstrasse 52 */
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/* D-70794 Filderstadt */
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/* EMail: uz@cc65.org */
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/* */
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/* */
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/* This software is provided 'as-is', without any expressed or implied */
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/* warranty. In no event will the authors be held liable for any damages */
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/* arising from the use of this software. */
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/* */
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/* Permission is granted to anyone to use this software for any purpose, */
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/* including commercial applications, and to alter it and redistribute it */
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/* freely, subject to the following restrictions: */
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/* */
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/* 1. The origin of this software must not be misrepresented; you must not */
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/* claim that you wrote the original software. If you use this software */
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/* in a product, an acknowledgment in the product documentation would be */
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/* appreciated but is not required. */
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/* 2. Altered source versions must be plainly marked as such, and must not */
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/* be misrepresented as being the original software. */
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/* 3. This notice may not be removed or altered from any source */
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/* distribution. */
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/* */
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/*****************************************************************************/
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/* common */
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#include "hashstr.h"
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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unsigned HashStr (const char* S)
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/* Return a hash value for the given string */
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{
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unsigned L, H;
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/* Do the hash */
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H = L = 0;
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while (*S) {
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H = ((H << 3) ^ ((unsigned char) *S++)) + L++;
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}
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return H;
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}
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unsigned HashBuf (const StrBuf* S)
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/* Return a hash value for the given string buffer */
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{
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unsigned I, L, H;
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/* Do the hash */
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H = L = 0;
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for (I = 0; I < SB_GetLen (S); ++I) {
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H = ((H << 3) ^ ((unsigned char) SB_AtUnchecked (S, I))) + L++;
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}
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return H;
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}
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