-/* Copyright (C) 2009, 2010
- Free Software Foundation, Inc.
+/* Copyright (C) 2009-2024 Free Software Foundation, Inc.
Contributed by Janne Blomqvist
This file is part of the GNU Fortran runtime library (libgfortran).
#include "io.h"
-
-struct stream
+struct stream_vtable
{
- ssize_t (*read) (struct stream *, void *, ssize_t);
- ssize_t (*write) (struct stream *, const void *, ssize_t);
- gfc_offset (*seek) (struct stream *, gfc_offset, int);
- gfc_offset (*tell) (struct stream *);
+ ssize_t (* const read) (struct stream *, void *, ssize_t);
+ ssize_t (* const write) (struct stream *, const void *, ssize_t);
+ gfc_offset (* const seek) (struct stream *, gfc_offset, int);
+ gfc_offset (* const tell) (struct stream *);
+ gfc_offset (* const size) (struct stream *);
/* Avoid keyword truncate due to AIX namespace collision. */
- int (*trunc) (struct stream *, gfc_offset);
- int (*flush) (struct stream *);
- int (*close) (struct stream *);
+ int (* const trunc) (struct stream *, gfc_offset);
+ int (* const flush) (struct stream *);
+ int (* const close) (struct stream *);
+ int (* const markeor) (struct stream *);
};
-
-typedef struct
+struct stream
{
- stream st;
-
- gfc_offset buffer_offset; /* File offset of the start of the buffer */
- gfc_offset physical_offset; /* Current physical file offset */
- gfc_offset logical_offset; /* Current logical file offset */
- gfc_offset file_length; /* Length of the file, -1 if not seekable. */
-
- char *buffer; /* Pointer to the buffer. */
- int fd; /* The POSIX file descriptor. */
-
- int active; /* Length of valid bytes in the buffer */
-
- int prot;
- int ndirty; /* Dirty bytes starting at buffer_offset */
-
- int special_file; /* =1 if the fd refers to a special file */
-}
-unix_stream;
-
+ const struct stream_vtable *vptr;
+};
/* Inline functions for doing file I/O given a stream. */
static inline ssize_t
-sread (stream * s, void * buf, ssize_t nbyte)
+sread (stream *s, void *buf, ssize_t nbyte)
{
- return s->read (s, buf, nbyte);
+ return s->vptr->read (s, buf, nbyte);
}
static inline ssize_t
-swrite (stream * s, const void * buf, ssize_t nbyte)
+swrite (stream *s, const void *buf, ssize_t nbyte)
{
- return s->write (s, buf, nbyte);
+ return s->vptr->write (s, buf, nbyte);
}
static inline gfc_offset
-sseek (stream * s, gfc_offset offset, int whence)
+sseek (stream *s, gfc_offset offset, int whence)
{
- return s->seek (s, offset, whence);
+ return s->vptr->seek (s, offset, whence);
}
static inline gfc_offset
-stell (stream * s)
+stell (stream *s)
{
- return s->tell (s);
+ return s->vptr->tell (s);
+}
+
+static inline gfc_offset
+ssize (stream *s)
+{
+ return s->vptr->size (s);
}
static inline int
-struncate (stream * s, gfc_offset length)
+struncate (stream *s, gfc_offset length)
{
- return s->trunc (s, length);
+ return s->vptr->trunc (s, length);
}
static inline int
-sflush (stream * s)
+sflush (stream *s)
{
- return s->flush (s);
+ return s->vptr->flush (s);
}
static inline int
-sclose (stream * s)
+sclose (stream *s)
{
- return s->close (s);
+ return s->vptr->close (s);
+}
+
+static inline int
+smarkeor (stream *s)
+{
+ return s->vptr->markeor (s);
}
extern stream *open_external (st_parameter_open *, unit_flags *);
internal_proto(open_external);
-extern stream *open_internal (char *, int, gfc_offset);
+extern stream *open_internal (char *, size_t, gfc_offset);
internal_proto(open_internal);
-extern stream *open_internal4 (char *, int, gfc_offset);
+extern stream *open_internal4 (char *, size_t, gfc_offset);
internal_proto(open_internal4);
-extern char * mem_alloc_w (stream *, int *);
+extern char *mem_alloc_w (stream *, size_t *);
internal_proto(mem_alloc_w);
-extern char * mem_alloc_r (stream *, int *);
+extern char *mem_alloc_r (stream *, size_t *);
internal_proto(mem_alloc_r);
-extern gfc_char4_t * mem_alloc_w4 (stream *, int *);
+extern gfc_char4_t *mem_alloc_w4 (stream *, size_t *);
internal_proto(mem_alloc_w4);
-extern char * mem_alloc_r4 (stream *, int *);
+extern char *mem_alloc_r4 (stream *, size_t *);
internal_proto(mem_alloc_r4);
extern stream *input_stream (void);
extern stream *error_stream (void);
internal_proto(error_stream);
-extern int compare_file_filename (gfc_unit *, const char *, int);
+extern int compare_file_filename (gfc_unit *, const char *, gfc_charlen_type);
internal_proto(compare_file_filename);
extern gfc_unit *find_file (const char *file, gfc_charlen_type file_len);
internal_proto(find_file);
-extern int delete_file (gfc_unit *);
-internal_proto(delete_file);
+extern int close_share (gfc_unit *);
+internal_proto(close_share);
extern int file_exists (const char *file, gfc_charlen_type file_len);
internal_proto(file_exists);
extern GFC_IO_INT file_size (const char *file, gfc_charlen_type file_len);
internal_proto(file_size);
-extern const char *inquire_sequential (const char *, int);
+extern const char *inquire_sequential (const char *, gfc_charlen_type);
internal_proto(inquire_sequential);
-extern const char *inquire_direct (const char *, int);
+extern const char *inquire_direct (const char *, gfc_charlen_type);
internal_proto(inquire_direct);
-extern const char *inquire_formatted (const char *, int);
+extern const char *inquire_formatted (const char *, gfc_charlen_type);
internal_proto(inquire_formatted);
-extern const char *inquire_unformatted (const char *, int);
+extern const char *inquire_unformatted (const char *, gfc_charlen_type);
internal_proto(inquire_unformatted);
-extern const char *inquire_read (const char *, int);
+extern const char *inquire_read (const char *, gfc_charlen_type);
internal_proto(inquire_read);
-extern const char *inquire_write (const char *, int);
+extern const char *inquire_write (const char *, gfc_charlen_type);
internal_proto(inquire_write);
-extern const char *inquire_readwrite (const char *, int);
+extern const char *inquire_readwrite (const char *, gfc_charlen_type);
internal_proto(inquire_readwrite);
-extern gfc_offset file_length (stream *);
-internal_proto(file_length);
-
-extern int is_seekable (stream *);
-internal_proto(is_seekable);
-
-extern int is_special (stream *);
-internal_proto(is_special);
-
extern void flush_if_preconnected (stream *);
internal_proto(flush_if_preconnected);
-extern void empty_internal_buffer(stream *);
-internal_proto(empty_internal_buffer);
-
extern int stream_isatty (stream *);
internal_proto(stream_isatty);
-extern char * stream_ttyname (stream *);
-internal_proto(stream_ttyname);
-
-extern int unpack_filename (char *, const char *, int);
-internal_proto(unpack_filename);
+#ifndef TTY_NAME_MAX
+#ifdef _POSIX_TTY_NAME_MAX
+#define TTY_NAME_MAX _POSIX_TTY_NAME_MAX
+#else
+/* sysconf(_SC_TTY_NAME_MAX) = 32 which should be enough. */
+#define TTY_NAME_MAX 32
+#endif
+#endif
+extern int stream_ttyname (stream *, char *, size_t);
+internal_proto(stream_ttyname);
#endif
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