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/*
* file_py3.i: Typemaps for FILE* for Python 3
*
* Copyright (c) 2011, Karel Slany (karel.slany AT nic.cz)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * 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.
* * Neither the name of the organization 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.
*/
%{
#include <unistd.h>
#include <fcntl.h>
%}
%types(FILE *);
//#define SWIG_FILE3_DEBUG
/* converts basic file descriptor flags onto a string */
%fragment("fdfl_to_str", "header") {
const char *
fdfl_to_str(int fdfl) {
static const char * const file_mode[] = {"w+", "w", "r"};
if (fdfl & O_RDWR) {
return file_mode[0];
} else if (fdfl & O_WRONLY) {
return file_mode[1];
} else {
return file_mode[2];
}
}
}
%fragment("is_obj_file", "header") {
int
is_obj_file(PyObject *obj) {
int fd, fdfl;
if (!PyLong_Check(obj) && /* is not an integer */
PyObject_HasAttrString(obj, "fileno") && /* has fileno method */
(PyObject_CallMethod(obj, "flush", NULL) != NULL) && /* flush() succeeded */
((fd = PyObject_AsFileDescriptor(obj)) != -1) && /* got file descriptor */
((fdfl = fcntl(fd, F_GETFL)) != -1) /* got descriptor flags */
) {
return 1;
}
else {
return 0;
}
}
}
%fragment("obj_to_file","header", fragment="fdfl_to_str,is_obj_file") {
FILE *
obj_to_file(PyObject *obj) {
int fd, fdfl;
FILE *fp;
if (is_obj_file(obj)) {
fd = PyObject_AsFileDescriptor(obj);
fdfl = fcntl(fd, F_GETFL);
fp = fdopen(dup(fd), fdfl_to_str(fdfl)); /* the FILE* must be flushed
and closed after being used */
#ifdef SWIG_FILE3_DEBUG
fprintf(stderr, "opening fd %d (fl %d \"%s\") as FILE %p\n",
fd, fdfl, fdfl_to_str(fdfl), (void *)fp);
#endif
return fp;
}
return NULL;
}
}
/* returns -1 if error occurred */
/* caused magic SWIG Syntax errors when was commented out */
#if 0
%fragment("dispose_file", "header") {
int
dispose_file(FILE **fp) {
#ifdef SWIG_FILE3_DEBUG
fprintf(stderr, "flushing FILE %p\n", (void *)fp);
#endif
if (*fp == NULL) {
return 0;
}
if ((fflush(*fp) == 0) && /* flush file */
(fclose(*fp) == 0)) { /* close file */
*fp = NULL;
return 0;
}
return -1;
}
}
#endif
%typemap(arginit, noblock = 1) FILE* {
$1 = NULL;
}
/*
* added due to ub_ctx_debugout since since it is overloaded:
* takes void* and FILE*. In reality only FILE* but the wrapper
* and the function is declared in such way.
*/
%typemap(typecheck, noblock = 1, fragment = "is_obj_file", precedence = SWIG_TYPECHECK_POINTER) FILE* {
$1 = is_obj_file($input);
}
%typemap(check, noblock = 1) FILE* {
if ($1 == NULL) {
/* The generated wrapper function raises TypeError on mismatching types. */
SWIG_exception_fail(SWIG_TypeError, "in method '" "$symname" "', argument "
"$argnum"" of type '" "$type""'");
}
}
%typemap(in, noblock = 1, fragment = "obj_to_file") FILE* {
$1 = obj_to_file($input);
}
/*
* Commented out due the way how ub_ctx_debugout() uses the parameter.
* This typemap would cause the FILE* to be closed after return from
* the function. This caused Python interpreter to crash, since the
* function just stores the FILE* internally in ctx and use it for
* logging. So we'll leave the closing of the file on the OS.
*/
/*%typemap(freearg, noblock = 1, fragment = "dispose_file") FILE* {
if (dispose_file(&$1) == -1) {
SWIG_exception_fail(SWIG_IOError, "closing file in method '" "$symname" "', argument "
"$argnum"" of type '" "$type""'");
}
}*/
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