128 lines
4.5 KiB
C
128 lines
4.5 KiB
C
/****************************************************************************
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* include/nuttx/symtab.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __INCLUDE_NUTTX_SYMTAB_H
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#define __INCLUDE_NUTTX_SYMTAB_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Types
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****************************************************************************/
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/* struct symbtab_s describes one entry in the symbol table. A symbol table
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* is a fixed size array of struct symtab_s. The information is intentionally
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* minimal and supports only:
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*
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* 1. Function pointers as sym_values. Of other kinds of values need to be
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* supported, then typing information would also need to be included in
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* the structure.
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*
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* 2. Fixed size arrays. There is no explicit provisional for dynamically
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* adding or removing entries from the symbol table (realloc might be
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* used for that purpose if needed). The intention is to support only
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* fixed size arrays completely defined at compilation or link time.
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*/
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struct symtab_s
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{
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FAR const char *sym_name; /* A pointer to the symbol name string */
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FAR const void *sym_value; /* The value associated with the string */
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};
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/****************************************************************************
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* Public Functions Definitions
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Name: symtab_findbyname
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*
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* Description:
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* Find the symbol in the symbol table with the matching name.
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* The implementation will be linear with respect to nsyms if
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* CONFIG_SYMTAB_ORDEREDBYNAME is not selected, and logarithmic
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* if it is.
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*
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* Returned Value:
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* A reference to the symbol table entry if an entry with the matching
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* name is found; NULL is returned if the entry is not found.
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*
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****************************************************************************/
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FAR const struct symtab_s *
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symtab_findbyname(FAR const struct symtab_s *symtab,
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FAR const char *name, int nsyms);
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/****************************************************************************
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* Name: symtab_findbyvalue
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*
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* Description:
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* Find the symbol in the symbol table whose value closest (but not greater
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* than), the provided value. This version assumes that table is not
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* ordered with respect to symbol value and, hence, access time will be
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* linear with respect to nsyms.
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*
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* Returned Value:
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* A reference to the symbol table entry if an entry with the matching
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* name is found; NULL is returned if the entry is not found.
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*
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****************************************************************************/
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FAR const struct symtab_s *
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symtab_findbyvalue(FAR const struct symtab_s *symtab,
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FAR void *value, int nsyms);
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/****************************************************************************
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* Name: symtab_sortbyname
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*
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* Description:
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* Sort the symbol table by name.
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*
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* Returned Value:
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* None.
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*
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****************************************************************************/
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void symtab_sortbyname(FAR struct symtab_s *symtab, int nsyms);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_NUTTX_SYMTAB_H */
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