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cexpsymsP.h
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/* private interface to cexp symbols (only seen by code implementing the symboltable) */
/* SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
*
* Authorship
* ----------
* This software (CEXP - C-expression interpreter and runtime
* object loader/linker) was created by
*
* Till Straumann <[email protected]>, 2002-2008,
* Stanford Linear Accelerator Center, Stanford University.
*
* Acknowledgement of sponsorship
* ------------------------------
* This software was produced by
* the Stanford Linear Accelerator Center, Stanford University,
* under Contract DE-AC03-76SFO0515 with the Department of Energy.
*
* Government disclaimer of liability
* ----------------------------------
* Neither the United States nor the United States Department of Energy,
* nor any of their employees, makes any warranty, express or implied, or
* assumes any legal liability or responsibility for the accuracy,
* completeness, or usefulness of any data, apparatus, product, or process
* disclosed, or represents that its use would not infringe privately owned
* rights.
*
* Stanford disclaimer of liability
* --------------------------------
* Stanford University makes no representations or warranties, express or
* implied, nor assumes any liability for the use of this software.
*
* Stanford disclaimer of copyright
* --------------------------------
* Stanford University, owner of the copyright, hereby disclaims its
* copyright and all other rights in this software. Hence, anyone may
* freely use it for any purpose without restriction.
*
* Maintenance of notices
* ----------------------
* In the interest of clarity regarding the origin and status of this
* SLAC software, this and all the preceding Stanford University notices
* are to remain affixed to any copy or derivative of this software made
* or distributed by the recipient and are to be affixed to any copy of
* software made or distributed by the recipient that contains a copy or
* derivative of this software.
*
* SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
*/
#ifndef CEXP_CEXPSYMS_P_H
#define CEXP_CEXPSYMS_P_H
#include "cexpsyms.h"
#include <cexp_regex.h>
/* our implementation of the symbol table holds more information
* that we make public
*/
typedef struct CexpStrTblRec_ {
char *chars;
struct CexpStrTblRec_ *next;
} CexpStrTblRec, *CexpStrTbl;
typedef struct CexpSymTblRec_ {
unsigned long nentries;
unsigned long size;
CexpSym syms; /* symbol table, sorted in ascending order (key=name) */
CexpStrTbl strtbl;
CexpSym *aindex; /* an index sorted to ascending addresses */
CexpSymTbl next; /* linked list of tables */
} CexpSymTblRec;
int
_cexp_addrcomp(const void *a, const void *b);
int
_cexp_namecomp(const void *a, const void *b);
char *
rshLoad(char *host, char *user, char *cmd, long *size_p);
/* Determine if we want to keep the external symbol 'ext_sym'.
* Must return a pointer to the symbol name if YES and 0 if NO
*/
typedef const char * (*CexpSymFilterProc)(void *ext_sym, void *closure);
/* Assign the internal representation fields to 'intSym' */
typedef void (CexpSymAssignProc)(void *ext_sym, CexpSym int_sym, void *closure);
/* Allocate a new symbol table capable of holding 'n_entries' slots
* (n_entries may be zero if a pre-fabricated symbol array is installed
* into this table).
*
* RETURNS: symbol table or NULL on failure.
*/
CexpSymTbl
cexpNewSymTbl(unsigned n_entries);
/* Sort symbols and addresses */
void
cexpSortSymTbl(CexpSymTbl stbl);
/* Build sorted index of addresses
* RETURNS 0 on success, nonzero on error (no memory of index table)
*/
int
cexpIndexSymTbl(CexpSymTbl stbl);
/* Convert 'nsyms' external symbols to internal representation and add to table;
*
* NOTES: - 'stbl' may be NULL in which case a new table is allocated.
* - routine does not sort entries (the idea is that multiple external
* tables are added and eventually sorted).
* - symbols should only be looked up *after* all necessary calls
* of this routine are executed and the symbol table sorted.
* It is NOT SAFE to change the structure of the table once
* users hold references into the table.
*
* - if the CEXP_SYMTBL_FLAG_NO_STRCPY is set in 'flags' then
* no copy of the symbol name is made. It is assumed that the
* external symbol table holds static strings which are safe
* to be re-used.
*/
#define CEXP_SYMTBL_FLAG_NO_STRCPY (1<<0)
CexpSymTbl
cexpAddSymTbl(CexpSymTbl stbl, void *syms, int symSize, int nsyms, CexpSymFilterProc filter, CexpSymAssignProc assign, void *closure, unsigned flags);
/* create and sort a Cexp symbol table from external representation */
CexpSymTbl
cexpCreateSymTbl(
void *syms, /* pointer to external symtab */
int symSize, /* size of one slot */
int nsyms, /* number of syms in external tab */
CexpSymFilterProc filter, /* routine to filter external syms */
CexpSymAssignProc assign, /* routine to assign the relevant fields to internal representation */
void *closure /* aux pointer passed to filter/assign */
);
/* release all resources associated with the symbol table
* (as well as the CexpSymTblRec itself).
* *tbl is set to 0.
*/
void
cexpFreeSymTbl(CexpSymTbl *tbl);
/* do a binary search for a symbol's aindex number */
int
cexpSymTblLkAddrIdx(void *addr, int margin, FILE *f, CexpSymTbl t);
/* a semi-public routine which takes a precompiled regexp.
* The reason this is not public is that we try to keep
* the public from having to deal with/know about the regexp
* implementation, i.e. which variant, which headers etc.
*/
CexpSym
_cexpSymTblLookupRegex(cexp_regex *rc, int *pmax, CexpSym s, FILE *f, CexpSymTbl t);
#define LOAD_CHUNK 2000
typedef struct CexpSymXtraInfoRec_ {
char *help;
} CexpSymXtraInfoRec;
typedef struct CexpSymXtraVeneerInfoRec_ {
CexpSymXtraInfoRec base;
void *veneer;
} CexpSymXtraVeneerInfoRec, *CexpSymXtraVeneerInfo;
#endif