1 /*****************************************************************************/
9 /* (C) 2003 Ullrich von Bassewitz */
10 /* Römerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
36 /* A string pool is used to store identifiers and other strings. Each string
37 * stored in the pool has a unique id, which may be used to access the string
38 * in the pool. Identical strings are only stored once in the pool and have
39 * identical ids. This means that instead of comparing strings, just the
40 * string pool ids must be compared.
57 /*****************************************************************************/
59 /*****************************************************************************/
63 /* Opaque string pool entry */
64 typedef struct StringPoolEntry StringPoolEntry;
67 typedef struct StringPool StringPool;
69 Collection Entries; /* Entries sorted by number */
70 unsigned TotalSize; /* Total size of all string data */
71 StringPoolEntry* Tab[4177]; /* Entry hash table */
74 /* A string pool initializer. We do only initialize the first field, all
75 * others will get zeroed out by the compiler.
77 #define STATIC_STRINGPOOL_INITIALIZER { \
78 STATIC_COLLECTION_INITIALIZER, \
85 /*****************************************************************************/
87 /*****************************************************************************/
91 StringPool* InitStringPool (StringPool* P);
92 /* Initialize a string pool */
94 void DoneStringPool (StringPool* P);
95 /* Free the data of a string pool (but not the data itself) */
97 StringPool* NewStringPool (void);
98 /* Allocate, initialize and return a new string pool */
100 void FreeStringPool (StringPool* P);
101 /* Free a string pool */
103 const char* SP_Get (const StringPool* P, unsigned Index);
104 /* Return a string from the pool. Index must exist, otherwise FAIL is called. */
106 unsigned SP_Add (StringPool* P, const char* S);
107 /* Add a string to the buffer and return the index. If the string does already
108 * exist in the pool, SP_Add will just return the index of the existing string.
111 #if defined(HAVE_INLINE)
112 INLINE unsigned SP_GetCount (const StringPool* P)
113 /* Return the number of strings in the pool */
115 return CollCount (&P->Entries);
118 # define SP_GetCount(P) CollCount (&(P)->Entries)
123 /* End of strpool.h */