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/*
* Name:
* c2f77.c
* Purpose:
* Implement the interface between the C and FORTRAN 77 languages.
* Description:
* This file implements language-specific functions which support
* the FORTRAN 77 interface to the AST library.
*
* Note that this module is not a class implementation, although it
* resembles one.
* Notes:
* - Some of the functions in this module are potentially platform
* dependent and may need to be re-implemented when porting the AST
* library to new platforms.
* Copyright:
* Copyright (C) 1997-2006 Council for the Central Laboratory of the
* Research Councils
* Licence:
* This program is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later
* version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* License along with this program. If not, see
* <http://www.gnu.org/licenses/>.
* Authors:
* DSB: D.S. Berry (Starlink)
* RFWS: R.F. Warren-Smith (Starlink)
* History:
* 15-NOV-1996 (RFWS):
* Original version (based on work by DSB and on code from the
* Starlink CNF library).
*/
/* Define the astCLASS macro (even although this is not a class
implementation) to obtain access to protected interfaces. */
#define astCLASS
/* Include files. */
/* ============== */
/* Interface definitions. */
/* ---------------------- */
#include "error.h" /* Error reporting facilities */
#include "c2f77.h" /* Interface to this module */
/* Function implementations. */
/* ========================= */
void astStringExport_( const char *source_c, char *dest_f, int dest_len ) {
/*
*+
* Name:
* astStringExport
* Purpose:
* Export a C string to a FORTRAN string.
* Type:
* Protected function.
* Synopsis:
* #include "c2f77.h"
* void astStringExport( const char *source_c, char *dest_f, int dest_len )
* Description:
* This function creates a FORTRAN string from a C string, storing
* it in the supplied memory. If the C string is shorter than the
* space allocated for the FORTRAN string, then it is padded with
* blanks. If the C string is longer than the space allocated for
* the FORTRAN string, then the string is truncated.
* Parameters:
* source_c
* A pointer to the input C string.
* dest_f
* A pointer to the output FORTRAN string.
* dest_len
* The length of the output FORTRAN string.
* Notes:
* - This function is potentially platform-specific. For example,
* if FORTRAN strings were passed by descriptor, then the
* descriptor address would be passed as "dest_f" and this must
* then be used to locate the actual FORTRAN character data.
* - This function is described as protected but is in fact
* available through the public interface so that it may be used in
* constructing the FORTRAN 77 public interface.
* - This is the UNIX version of this function.
*-
*/
/* Local Variables:*/
int i; /* Loop counter for characters */
int *status; /* Pointer to inherited status value */
/* Get a pointer to the inherited status value. */
status = astGetStatusPtr;
/* Check the global error status. */
if ( !astOK ) return;
/* Copy the characters of the input C string to the output FORTRAN
string, taking care not to go beyond the end of the FORTRAN
string.*/
for ( i = 0; source_c[ i ] && ( i < dest_len ); i++ ) {
dest_f[ i ] = source_c[ i ];
}
/* Fill the rest of the output FORTRAN string with blanks. */
for ( ; i < dest_len; i++ ) dest_f[ i ] = ' ';
}
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