156 lines
4.5 KiB
C
156 lines
4.5 KiB
C
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/***************************************************************************
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TITLE: ls_sym.h
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----------------------------------------------------------------------------
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FUNCTION: Header file for symbol table routines
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----------------------------------------------------------------------------
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MODULE STATUS: production
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----------------------------------------------------------------------------
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GENEALOGY: Created 930629 by E. B. Jackson
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----------------------------------------------------------------------------
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DESIGNED BY: Bruce Jackson
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CODED BY: same
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MAINTAINED BY:
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----------------------------------------------------------------------------
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MODIFICATION HISTORY:
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DATE PURPOSE BY
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950227 Added header and declarations for ls_print_findsym_error(),
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ls_get_double(), and ls_get_double() routines. EBJ
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950302 Added structure for symbol description. EBJ
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950306 Added ls_get_sym_val() and ls_set_sym_val() routines.
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This is now the production version. EBJ
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CURRENT RCS HEADER:
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$Header$
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$Log$
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Revision 1.1 1997/05/29 00:10:00 curt
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Initial Flight Gear revision.
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* Revision 1.9 1995/03/07 12:52:33 bjax
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* This production version now specified ls_get_sym_val() and ls_put_sym_val().
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*
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* Revision 1.6.1.2 1995/03/06 18:45:41 bjax
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* Added def'n of ls_get_sym_val() and ls_set_sym_val(); changed symbol_rec
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* Addr field from void * to char *.
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* EBJ
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*
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* Revision 1.6.1.1 1995/03/03 01:17:44 bjax
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* Experimental version with just ls_get_double and ls_set_double() routines.
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*
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* Revision 1.6 1995/02/27 19:50:49 bjax
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* Added header and declarations for ls_print_findsym_error(),
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* ls_get_double(), and ls_set_double(). EBJ
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*
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----------------------------------------------------------------------------
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REFERENCES:
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----------------------------------------------------------------------------
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CALLED BY:
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----------------------------------------------------------------------------
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CALLS TO:
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----------------------------------------------------------------------------
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INPUTS:
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----------------------------------------------------------------------------
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OUTPUTS:
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--------------------------------------------------------------------------*/
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/* Return codes */
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#define SYM_NOT_LOADED -2
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#define SYM_UNEXPECTED_ERR -1
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#define SYM_OK 0
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#define SYM_OPEN_ERR 1
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#define SYM_NO_SYMS 2
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#define SYM_MOD_NOT_FOUND 3
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#define SYM_VAR_NOT_FOUND 4
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#define SYM_NOT_SCALAR 5
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#define SYM_NOT_STATIC 6
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#define SYM_MEMORY_ERR 7
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#define SYM_UNMATCHED_PAREN 8
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#define SYM_BAD_SYNTAX 9
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#define SYM_INDEX_BOUNDS_ERR 10
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typedef enum {Unknown, Char, UChar, SHint, USHint, Sint, Uint, Slng, Ulng, flt, dbl} vartype;
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typedef char SYMBOL_NAME[64];
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typedef vartype SYMBOL_TYPE;
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typedef struct
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{
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SYMBOL_NAME Mod_Name;
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SYMBOL_NAME Par_Name;
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SYMBOL_TYPE Par_Type;
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SYMBOL_NAME Alias;
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char *Addr;
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} symbol_rec;
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extern int ls_findsym( const char *modname, const char *varname,
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char **addr, vartype *vtype );
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extern void ls_print_findsym_error(int result,
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char *mod_name,
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char *var_name);
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extern double ls_get_double(vartype sym_type, void *addr );
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extern void ls_set_double(vartype sym_type, void *addr, double value );
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extern double ls_get_sym_val( symbol_rec *symrec, int *error );
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/* This routine attempts to return the present value of the symbol
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described in symbol_rec. If Addr is non-zero, the value of that
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location, interpreted as type double, will be returned. If Addr
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is zero, and Mod_Name and Par_Name are both not null strings,
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the ls_findsym() routine is used to try to obtain the address
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by looking at debugger symbol tables in the executable image, and
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the value of the double contained at that address is returned,
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and the symbol record is updated to contain the address of that
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symbol. If an error is discovered, 'error' will be non-zero and
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and error message is printed on stderr. */
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extern void ls_set_sym_val( symbol_rec *symrec, double value );
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/* This routine sets the value of a double at the location pointed
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to by the symbol_rec's Addr field, if Addr is non-zero. If Addr
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is zero, and Mod_Name and Par_Name are both not null strings,
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the ls_findsym() routine is used to try to obtain the address
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by looking at debugger symbol tables in the executable image, and
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the value of the double contained at that address is returned,
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and the symbol record is updated to contain the address of that
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symbol. If an error is discovered, 'error' will be non-zero and
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and error message is printed on stderr. */
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