mirror of https://github.com/cc65/cc65.git
104 lines
4.4 KiB
C
104 lines
4.4 KiB
C
/*****************************************************************************/
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/* */
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/* strpool.h */
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/* */
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/* A string pool */
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/* */
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/* */
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/* */
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/* (C) 2003-2008 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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/* A string pool is used to store identifiers and other strings. Each string
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** stored in the pool has a unique ID, which may be used to access the string
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** in the pool. Identical strings are only stored once in the pool and have
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** identical IDs. This means that instead of comparing strings, just the
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** string pool IDs must be compared.
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*/
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#ifndef STRPOOL_H
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#define STRPOOL_H
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/* common */
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#include "hashtab.h"
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#include "strbuf.h"
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/*****************************************************************************/
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/* Data */
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/*****************************************************************************/
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/* Opaque string pool entry */
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typedef struct StringPoolEntry StringPoolEntry;
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/* A string pool */
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typedef struct StringPool StringPool;
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/*****************************************************************************/
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/* Code */
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/*****************************************************************************/
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StringPool* NewStringPool (unsigned HashSlots);
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/* Allocate, initialize and return a new string pool */
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void FreeStringPool (StringPool* P);
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/* Free a string pool */
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const StrBuf* SP_Get (const StringPool* P, unsigned Index);
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/* Return a string from the pool. Index must exist, otherwise FAIL is called. */
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unsigned SP_Add (StringPool* P, const StrBuf* S);
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/* Add a string buffer to the buffer and return the index. If the string does
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** already exist in the pool, SP_AddBuf will just return the index of the
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** existing string.
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*/
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unsigned SP_AddStr (StringPool* P, const char* S);
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/* Add a string to the buffer and return the index. If the string does already
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** exist in the pool, SP_Add will just return the index of the existing string.
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*/
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unsigned SP_GetCount (const StringPool* P);
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/* Return the number of strings in the pool */
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/* End of strpool.h */
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#endif
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