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/****************************************************************************
* include/nuttx/symtab.h
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_NUTTX_SYMTAB_H
#define __INCLUDE_NUTTX_SYMTAB_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Types
****************************************************************************/
/* struct symbtab_s describes one entry in the symbol table. A symbol table
* is a fixed size array of struct symtab_s. The information is intentionally
* minimal and supports only:
*
* 1. Function points as sym_values. Of other kinds of values need to be
* supported, then typing information would also need to be included in
* the structure.
*
* 2. Fixed size arrays. There is no explicit provisional for dyanamically
* adding or removing entries from the symbol table (realloc might be
* used for that purpose if needed). The intention is to support only
* fixed size arrays completely defined at compilation or link time.
*/
struct symtab_s
{
FAR const char *sym_name; /* A pointer to the symbol name string */
FAR const void *sym_value; /* The value associated witht the string */
};
/****************************************************************************
* Public Functions
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C" {
#else
#define EXTERN extern
#endif
/****************************************************************************
* Name: symtab_findbyname
*
* Description:
* Find the symbol in the symbol table with the matching name.
* This version assumes that table is not ordered with respect to symbol
* name and, hence, access time will be linear with respect to nsyms.
*
* Returned Value:
* A reference to the symbol table entry if an entry with the matching
* name is found; NULL is returned if the entry is not found.
*
****************************************************************************/
EXTERN FAR const struct symtab_s *
symtab_findbyname(FAR const struct symtab_s *symtab,
FAR const char *name, int nsyms);
/****************************************************************************
* Name: symtab_findorderedbyname
*
* Description:
* Find the symbol in the symbol table with the matching name.
* This version assumes that table ordered with respect to symbol name.
*
* Returned Value:
* A reference to the symbol table entry if an entry with the matching
* name is found; NULL is returned if the entry is not found.
*
****************************************************************************/
EXTERN FAR const struct symtab_s *
symtab_findorderedbyname(FAR const struct symtab_s *symtab,
FAR const char *name, int nsyms);
/****************************************************************************
* Name: symtab_findbyvalue
*
* Description:
* Find the symbol in the symbol table whose value closest (but not greater
* than), the provided value. This version assumes that table is not ordered
* with respect to symbol name and, hence, access time will be linear with
* respect to nsyms.
*
* Returned Value:
* A reference to the symbol table entry if an entry with the matching
* name is found; NULL is returned if the entry is not found.
*
****************************************************************************/
EXTERN FAR const struct symtab_s *
symtab_findbyvalue(FAR const struct symtab_s *symtab,
FAR void *value, int nsyms);
/****************************************************************************
* Name: symtab_findorderedbyvalue
*
* Description:
* Find the symbol in the symbol table whose value closest (but not greater
* than), the provided value. This version assumes that table is ordered
* with respect to symbol name.
*
* Returned Value:
* A reference to the symbol table entry if an entry with the matching
* name is found; NULL is returned if the entry is not found.
*
****************************************************************************/
EXTERN FAR const struct symtab_s *
symtab_findorderedbyvalue(FAR const struct symtab_s *symtab,
FAR void *value, int nsyms);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_NUTTX_SYMTAB_H */
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