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In support of popen(), file objects are now parametrized with a close 

function on creation.  (There's a funny thing about the return
value of the close function that should be resolved.)
Also added 'isatty' method.
This commit is contained in:
Guido van Rossum 1991-06-04 19:37:39 +00:00
parent 067b9c0aef
commit a1ab7fae44
1 changed files with 32 additions and 11 deletions
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43
Objects/fileobject.c
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@ -24,12 +24,6 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
/* File object implementation */
/* XXX This should become a built-in module 'io'. It should support more
functionality, better exception handling for invalid calls, etc.
(Especially reading on a write-only file or vice versa!)
It should also cooperate with posix to support popen(), which should
share most code but have a special close function. */
#include "allobjects.h"
#define BUF(v) GETSTRINGVALUE((stringobject *)v)
@ -44,6 +38,7 @@ typedef struct {
FILE *f_fp;
object *f_name;
object *f_mode;
int (*f_close) PROTO((FILE *));
int f_softspace; /* Flag used by 'print' command */
} fileobject;
@ -59,10 +54,11 @@ getfilefile(f)
}
object *
newopenfileobject(fp, name, mode)
newopenfileobject(fp, name, mode, close)
FILE *fp;
char *name;
char *mode;
int (*close) FPROTO((FILE *));
{
fileobject *f = NEWOBJ(fileobject, &Filetype);
if (f == NULL)
@ -70,6 +66,7 @@ newopenfileobject(fp, name, mode)
f->f_fp = NULL;
f->f_name = newstringobject(name);
f->f_mode = newstringobject(mode);
f->f_close = close;
f->f_softspace = 0;
if (f->f_name == NULL || f->f_mode == NULL) {
DECREF(f);
@ -83,9 +80,10 @@ object *
newfileobject(name, mode)
char *name, *mode;
{
extern int fclose PROTO((FILE *));
fileobject *f;
FILE *fp;
f = (fileobject *) newopenfileobject((FILE *)NULL, name, mode);
f = (fileobject *) newopenfileobject((FILE *)NULL, name, mode, fclose);
if (f == NULL)
return NULL;
#ifdef THINK_C
@ -110,8 +108,8 @@ static void
file_dealloc(f)
fileobject *f;
{
if (f->f_fp != NULL)
fclose(f->f_fp);
if (f->f_fp != NULL && f->f_close != NULL)
(*f->f_close)(f->f_fp);
if (f->f_name != NULL)
DECREF(f->f_name);
if (f->f_mode != NULL)
@ -151,14 +149,24 @@ file_close(f, args)
fileobject *f;
object *args;
{
int sts = 0;
if (args != NULL) {
err_badarg();
return NULL;
}
errno = 0;
if (f->f_fp != NULL) {
fclose(f->f_fp);
if (f->f_close != NULL)
sts = (*f->f_close)(f->f_fp);
f->f_fp = NULL;
}
if (sts == EOF) {
if (errno == 0)
errno = EIO;
return err_errno(RuntimeError);
}
if (sts != 0)
return newintobject((long)sts);
INCREF(None);
return None;
}
@ -232,6 +240,18 @@ file_flush(f, args)
return None;
}
static object *
file_isatty(f, args)
fileobject *f;
object *args;
{
if (args != NULL || f->f_fp == NULL) {
err_badarg();
return NULL;
}
return newintobject((long)isatty(fileno(f->f_fp)));
}
static object *
file_read(f, args)
fileobject *f;
@ -442,6 +462,7 @@ file_write(f, args)
static struct methodlist file_methods[] = {
{"close", file_close},
{"flush", file_flush},
{"isatty", file_isatty},
{"read", file_read},
{"readline", file_readline},
{"readlines", file_readlines},