/* Copyright (C) 1996-2015 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see . */ #if !defined (octave_f77_fcn_h) #define octave_f77_fcn_h 1 #include "quit.h" #ifdef __cplusplus extern "C" { #endif /* Hack to stringize macro results. */ #define xSTRINGIZE(x) #x #define STRINGIZE(x) xSTRINGIZE(x) /* How to print an error for the F77_XFCN macro. */ #define F77_XFCN_ERROR(f, F) \ (*current_liboctave_error_handler) \ ("exception encountered in Fortran subroutine %s", \ STRINGIZE (F77_FUNC (f, F))) /* This can be used to call a Fortran subroutine that might call XSTOPX. XSTOPX will call lonjmp with current_context. Once back here, we'll restore the previous context and return. We may also end up here if an interrupt is processed when the Fortran subroutine is called. In that case, we resotre the context and go to the top level. The error_state should be checked immediately after this macro is used. */ #define F77_XFCN(f, F, args) \ do \ { \ octave_jmp_buf saved_context; \ sig_atomic_t saved_octave_interrupt_immediately = octave_interrupt_immediately; \ f77_exception_encountered = 0; \ octave_save_current_context (saved_context); \ if (octave_set_current_context) \ { \ octave_interrupt_immediately = saved_octave_interrupt_immediately; \ octave_restore_current_context (saved_context); \ if (f77_exception_encountered) \ F77_XFCN_ERROR (f, F); \ else \ octave_rethrow_exception (); \ } \ else \ { \ octave_interrupt_immediately++; \ F77_FUNC (f, F) args; \ octave_interrupt_immediately--; \ octave_restore_current_context (saved_context); \ } \ } \ while (0) /* So we can check to see if an exception has occurred. */ CRUFT_API extern int f77_exception_encountered; #if !defined (F77_FCN) #define F77_FCN(f, F) F77_FUNC (f, F) #endif /* The following macros are used for handling Fortran <-> C calling conventions. They are defined below for three different types of systems, Cray (possibly now obsolete), Visual Fortran, and any system that is compatible with the f2c calling conventions, including g77 and gfortran. Note that gfortran is not completely compatible with the f2c calling conventions, but that we only use the parts that are compatible. For example, f2c and gfortran differ in the way they handle Fortran functions that return complex values, but Octave does not call any Fortran functions like that directly from C or C++. Use these macros to pass character strings from C to Fortran: F77_CHAR_ARG(x) F77_CONST_CHAR_ARG(x) F77_CXX_STRING_ARG(x) F77_CHAR_ARG_LEN(l) F77_CHAR_ARG_DECL F77_CONST_CHAR_ARG_DECL F77_CHAR_ARG_LEN_DECL Use these macros to write C-language functions that accept Fortran-style character strings: F77_CHAR_ARG_DEF(s, len) F77_CONST_CHAR_ARG_DEF(s, len) F77_CHAR_ARG_LEN_DEF(len) F77_CHAR_ARG_USE(s) F77_CHAR_ARG_LEN_USE(s, len) Use this macro to declare the return type of a C-language function that is supposed to act like a Fortran subroutine: F77_RET_T int Use these macros to return from C-language functions that are supposed to act like Fortran subroutines. F77_NORETURN is intended to be used as the last statement of such a function that has been tagged with a "noreturn" attribute. If the compiler supports the "noreturn" attribute or if F77_RET_T is void, then it should expand to nothing so that we avoid warnings about functions tagged as "noreturn" containing a return statement. Otherwise, it should expand to a statement that returns the given value so that we avoid warnings about not returning a value from a function declared to return something. F77_RETURN(retval) F77_NORETURN(retval) */ #if defined (F77_USES_CRAY_CALLING_CONVENTION) #include /* Use these macros to pass character strings from C to Fortran. */ #define F77_CHAR_ARG(x) octave_make_cray_ftn_ch_dsc (x, strlen (x)) #define F77_CONST_CHAR_ARG(x) \ octave_make_cray_const_ftn_ch_dsc (x, strlen (x)) #define F77_CHAR_ARG2(x, l) octave_make_cray_ftn_ch_dsc (x, l) #define F77_CONST_CHAR_ARG2(x, l) octave_make_cray_const_ftn_ch_dsc (x, l) #define F77_CXX_STRING_ARG(x) \ octave_make_cray_const_ftn_ch_dsc (x.c_str (), x.length ()) #define F77_CHAR_ARG_LEN(l) #define F77_CHAR_ARG_DECL octave_cray_ftn_ch_dsc #define F77_CONST_CHAR_ARG_DECL octave_cray_ftn_ch_dsc #define F77_CHAR_ARG_LEN_DECL /* Use these macros to write C-language functions that accept Fortran-style character strings. */ #define F77_CHAR_ARG_DEF(s, len) octave_cray_ftn_ch_dsc s #define F77_CONST_CHAR_ARG_DEF(s, len) octave_cray_ftn_ch_dsc s #define F77_CHAR_ARG_LEN_DEF(len) #define F77_CHAR_ARG_USE(s) s.ptr #define F77_CHAR_ARG_LEN_USE(s, len) (s.mask.len>>3) /* Use this macro to declare the return type of a C-language function that is supposed to act like a Fortran subroutine. */ #define F77_RET_T int /* Use these macros to return from C-language functions that are supposed to act like Fortran subroutines. F77_NORETURN is intended to be used as the last statement of such a function that has been tagged with a "noreturn" attribute. */ #define F77_RETURN(retval) return retval; #if defined (HAVE_ATTR_NORETURN) #define F77_NORETURN(retval) #else #define F77_NORETURN(retval) return retval; #endif /* FIXME -- these should work for SV1 or Y-MP systems but will need to be changed for others. */ typedef union { const char *const_ptr; char *ptr; struct { unsigned off : 6; unsigned len : 26; unsigned add : 32; } mask; } octave_cray_descriptor; typedef void *octave_cray_ftn_ch_dsc; #ifdef __cplusplus #define OCTAVE_F77_FCN_INLINE inline #else #define OCTAVE_F77_FCN_INLINE #endif static OCTAVE_F77_FCN_INLINE octave_cray_ftn_ch_dsc octave_make_cray_ftn_ch_dsc (char *ptr_arg, unsigned long len_arg) { octave_cray_descriptor desc; desc.ptr = ptr_arg; desc.mask.len = len_arg << 3; return *((octave_cray_ftn_ch_dsc *) &desc); } static OCTAVE_F77_FCN_INLINE octave_cray_ftn_ch_dsc octave_make_cray_const_ftn_ch_dsc (const char *ptr_arg, unsigned long len_arg) { octave_cray_descriptor desc; desc.const_ptr = ptr_arg; desc.mask.len = len_arg << 3; return *((octave_cray_ftn_ch_dsc *) &desc); } #ifdef __cplusplus #undef OCTAVE_F77_FCN_INLINE #endif #elif defined (F77_USES_VISUAL_FORTRAN_CALLING_CONVENTION) /* Use these macros to pass character strings from C to Fortran. */ #define F77_CHAR_ARG(x) x, strlen (x) #define F77_CONST_CHAR_ARG(x) F77_CHAR_ARG (x) #define F77_CHAR_ARG2(x, l) x, l #define F77_CONST_CHAR_ARG2(x, l) F77_CHAR_ARG2 (x, l) #define F77_CXX_STRING_ARG(x) F77_CONST_CHAR_ARG2 (x.c_str (), x.length ()) #define F77_CHAR_ARG_LEN(l) #define F77_CHAR_ARG_DECL char *, int #define F77_CONST_CHAR_ARG_DECL const char *, int #define F77_CHAR_ARG_LEN_DECL #define F77_CHAR_ARG_DEF(s, len) char *s, int len #define F77_CONST_CHAR_ARG_DEF(s, len) const char *s, int len #define F77_CHAR_ARG_LEN_DEF(len) #define F77_CHAR_ARG_USE(s) s #define F77_CHAR_ARG_LEN_USE(s, len) len #define F77_RET_T void #define F77_RETURN(retval) return; #define F77_NORETURN(retval) #else /* Assume f2c-compatible calling convention. */ #define F77_CHAR_ARG(x) x #define F77_CONST_CHAR_ARG(x) F77_CHAR_ARG (x) #define F77_CHAR_ARG2(x, l) x #define F77_CONST_CHAR_ARG2(x, l) F77_CHAR_ARG2 (x, l) #define F77_CXX_STRING_ARG(x) F77_CONST_CHAR_ARG2 (x.c_str (), x.length ()) #define F77_CHAR_ARG_LEN(l) , l #define F77_CHAR_ARG_DECL char * #define F77_CONST_CHAR_ARG_DECL const char * #define F77_CHAR_ARG_LEN_DECL , long #define F77_CHAR_ARG_DEF(s, len) char *s #define F77_CONST_CHAR_ARG_DEF(s, len) const char *s #define F77_CHAR_ARG_LEN_DEF(len) , long len #define F77_CHAR_ARG_USE(s) s #define F77_CHAR_ARG_LEN_USE(s, len) len #define F77_RET_T int #define F77_RETURN(retval) return retval; #if defined (HAVE_ATTR_NORETURN) #define F77_NORETURN(retval) #else #define F77_NORETURN(retval) return retval; #endif #endif /* Build a C string local variable CS from the Fortran string parameter S declared as F77_CHAR_ARG_DEF(s, len) or F77_CONST_CHAR_ARG_DEF(s, len). The string will be cleaned up at the end of the current block. Needs to include and . */ #define F77_CSTRING(s, len, cs) \ OCTAVE_LOCAL_BUFFER (char, cs, F77_CHAR_ARG_LEN_USE (s, len) + 1); \ memcpy (cs, F77_CHAR_ARG_USE (s), F77_CHAR_ARG_LEN_USE (s, len)); \ cs[F77_CHAR_ARG_LEN_USE(s, len)] = '\0' extern CRUFT_API F77_RET_T F77_FUNC (xstopx, XSTOPX) (F77_CONST_CHAR_ARG_DECL F77_CHAR_ARG_LEN_DECL) GCC_ATTR_NORETURN; #ifdef __cplusplus } #endif #endif