You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#include <config.h>
#include "file-handle.h"
#include "filename.h"
#include "command.h"
#include "lexer.h"
-#include "getline.h"
+#include "getl.h"
#include "error.h"
#include "magic.h"
#include "var.h"
#include "linked-list.h"
+#include "file-handle-def.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
/* (headers) */
-/* File handle. */
-struct file_handle
- {
- struct file_handle *next; /* Next in global list. */
- char *name; /* File handle identifier. */
- char *filename; /* Filename as provided by user. */
- struct file_identity *identity; /* For checking file identity. */
- struct file_locator where; /* Used for reporting error messages. */
- enum file_handle_mode mode; /* File mode. */
- size_t length; /* Length of fixed-format records. */
- size_t tab_width; /* Tab width, 0=do not expand tabs. */
-
- int open_cnt; /* 0=not open, otherwise # of openers. */
- const char *type; /* If open, type of file. */
- const char *open_mode; /* "[rw][se]". */
- void *aux; /* Aux data pointer for owner if any. */
- };
-
-static struct file_handle *file_handles;
-
-static struct file_handle *create_file_handle (const char *handle_name,
- const char *filename);
/* (specification)
"FILE HANDLE" (fh_):
/* (declarations) */
/* (functions) */
-static struct file_handle *
-get_handle_with_name (const char *handle_name)
-{
- struct file_handle *iter;
-
- for (iter = file_handles; iter != NULL; iter = iter->next)
- if (!strcmp (handle_name, iter->name))
- return iter;
- return NULL;
-}
-
-static struct file_handle *
-get_handle_for_filename (const char *filename)
-{
- struct file_identity *identity;
- struct file_handle *iter;
-
- /* First check for a file with the same identity. */
- identity = fn_get_identity (filename);
- if (identity != NULL)
- {
- for (iter = file_handles; iter != NULL; iter = iter->next)
- if (iter->identity != NULL
- && !fn_compare_file_identities (identity, iter->identity))
- {
- fn_free_identity (identity);
- return iter;
- }
- fn_free_identity (identity);
- }
-
- /* Then check for a file with the same name. */
- for (iter = file_handles; iter != NULL; iter = iter->next)
- if (!strcmp (filename, iter->filename))
- return iter;
-
- return NULL;
-}
int
cmd_file_handle (void)
{
- char handle_name[9];
+ char handle_name[LONG_NAME_LEN + 1];
+ enum file_handle_mode mode = MODE_TEXT;
+ size_t length = 1024;
+ size_t tab_width = 4;
struct cmd_file_handle cmd;
struct file_handle *handle;
if (!lex_force_id ())
return CMD_FAILURE;
- strcpy (handle_name, tokid);
+ str_copy_trunc (handle_name, sizeof handle_name, tokid);
handle = get_handle_with_name (handle_name);
if (handle != NULL)
{
- msg (SE, _("File handle %s already refers to "
- "file %s. File handle cannot be redefined within a "
- "session."),
- tokid, handle->filename);
+ msg (SE, _("File handle %s already refers to file %s. "
+ "File handles cannot be redefined within a session."),
+ handle_name, handle_get_filename(handle));
return CMD_FAILURE;
}
goto lossage;
}
- handle = create_file_handle (handle_name, cmd.s_name);
switch (cmd.mode)
{
case FH_CHARACTER:
- handle->mode = MODE_TEXT;
+ mode = MODE_TEXT;
if (cmd.sbc_tabwidth)
- handle->tab_width = cmd.n_tabwidth[0];
+ tab_width = cmd.n_tabwidth[0];
else
- handle->tab_width = 4;
+ tab_width = 4;
break;
case FH_IMAGE:
- handle->mode = MODE_BINARY;
+ mode = MODE_BINARY;
if (cmd.n_lrecl[0] == NOT_LONG)
{
msg (SE, _("Fixed-length records were specified on /RECFORM, but "
"record length was not specified on /LRECL. "
"Assuming 1024-character records."));
- handle->length = 1024;
+ length = 1024;
}
else if (cmd.n_lrecl[0] < 1)
{
msg (SE, _("Record length (%ld) must be at least one byte. "
- "1-character records will be assumed."), cmd.n_lrecl);
- handle->length = 1;
+ "1-character records will be assumed."), cmd.n_lrecl[0]);
+ length = 1;
}
else
- handle->length = cmd.n_lrecl[0];
+ length = cmd.n_lrecl[0];
break;
default:
assert (0);
}
+ handle = create_file_handle (handle_name, cmd.s_name,
+ mode, length, tab_width);
+
+ free_file_handle (&cmd);
return CMD_SUCCESS;
lossage:
free_file_handle (&cmd);
return CMD_FAILURE;
}
-\f
-/* File handle functions. */
-
-/* Creates and returns a new file handle with the given values
- and defaults for other values. Adds the created file handle
- to the global list. */
-static struct file_handle *
-create_file_handle (const char *handle_name, const char *filename)
-{
- struct file_handle *handle;
- /* Create and initialize file handle. */
- handle = xmalloc (sizeof *handle);
- handle->next = file_handles;
- handle->name = xstrdup (handle_name);
- handle->filename = xstrdup (filename);
- handle->identity = fn_get_identity (filename);
- handle->where.filename = handle->filename;
- handle->where.line_number = 0;
- handle->mode = MODE_TEXT;
- handle->length = 1024;
- handle->tab_width = 4;
- handle->open_cnt = 0;
- handle->type = NULL;
- handle->open_mode = NULL;
- handle->aux = NULL;
- file_handles = handle;
-
- return handle;
-}
-
-static void
-destroy_file_handle(void *fh_, void *aux UNUSED)
-{
- struct file_handle *fh = fh_;
- free (fh->name);
- free (fh->filename);
- fn_free_identity (fh->identity);
- free (fh);
-}
-
-static const char *
-mode_name (const char *mode)
-{
- assert (mode != NULL);
- assert (mode[0] == 'r' || mode[0] == 'w');
-
- return mode[0] == 'r' ? "reading" : "writing";
-}
-
-
-/* Tries to open FILE with the given TYPE and MODE.
-
- TYPE is the sort of file, e.g. "system file". Only one given
- type of access is allowed on a given file handle at once.
-
- MODE combines the read or write mode with the sharing mode.
- The first character is 'r' for read, 'w' for write. The
- second character is 's' to permit sharing, 'e' to require
- exclusive access.
-
- Returns the address of a void * that the caller can use for
- data specific to the file handle if successful, or a null
- pointer on failure. For exclusive access modes the void *
- will always be a null pointer at return. In shared access
- modes the void * will necessarily be null only if no other
- sharers are active.
-
- If successful, references to type and mode are retained, so
- they should probably be string literals. */
-void **
-fh_open (struct file_handle *h, const char *type, const char *mode)
-{
- assert (h != NULL);
- assert (type != NULL);
- assert (mode != NULL);
- assert (mode[0] == 'r' || mode[0] == 'w');
- assert (mode[1] == 's' || mode[1] == 'e');
- assert (mode[2] == '\0');
-
- if (h->open_cnt != 0)
- {
- if (strcmp (h->type, type))
- msg (SE, _("Can't open %s as a %s because it is "
- "already open as a %s"),
- handle_get_name (h), type, h->type);
- else if (strcmp (h->open_mode, mode))
- msg (SE, _("Can't open %s as a %s for %s because it is "
- "already open for %s"),
- handle_get_name (h), type,
- mode_name (mode), mode_name (h->open_mode));
- else if (h->open_mode[1] == 'e')
- msg (SE, _("Can't re-open %s as a %s for %s"),
- handle_get_name (h), type, mode_name (mode));
- }
- else
- {
- h->type = type;
- h->open_mode = mode;
- assert (h->aux == NULL);
- }
- h->open_cnt++;
-
- return &h->aux;
-}
-
-/* Closes file handle H, which must have been open for the
- specified TYPE and MODE of access provided to fh_open().
- Returns zero if the file is now closed, nonzero if it is still
- open due to another reference. */
-int
-fh_close (struct file_handle *h, const char *type, const char *mode)
-{
- assert (h != NULL);
- assert (h->open_cnt > 0);
- assert (type != NULL);
- assert (!strcmp (type, h->type));
- assert (mode != NULL);
- assert (!strcmp (mode, h->open_mode));
-
- h->open_cnt--;
- if (h->open_cnt == 0)
- {
- h->type = NULL;
- h->open_mode = NULL;
- h->aux = NULL;
- }
- return h->open_cnt;
-}
static struct linked_list *handle_list;
char *filename = ds_c_str (&tokstr);
char *handle_name = xmalloc (strlen (filename) + 3);
sprintf (handle_name, "\"%s\"", filename);
- handle = create_file_handle (handle_name, filename);
+ handle = create_file_handle_with_defaults (handle_name, filename);
ll_push_front(handle_list, handle);
free (handle_name);
}
return handle;
}
-/* Returns the identifier of file HANDLE. If HANDLE was created
- by referring to a filename instead of a handle name, returns
- the filename, enclosed in double quotes. Return value is
- owned by the file handle.
-
- Useful for printing error messages about use of file handles. */
-const char *
-handle_get_name (const struct file_handle *handle)
-{
- assert (handle != NULL);
- return handle->name;
-}
-
-/* Returns the name of the file associated with HANDLE. */
-const char *
-handle_get_filename (const struct file_handle *handle)
-{
- assert (handle != NULL);
- return handle->filename;
-}
-
-/* Returns the mode of HANDLE. */
-enum file_handle_mode
-handle_get_mode (const struct file_handle *handle)
-{
- assert (handle != NULL);
- return handle->mode;
-}
-
-/* Returns the width of a logical record on HANDLE. Applicable
- only to MODE_BINARY files. */
-size_t
-handle_get_record_width (const struct file_handle *handle)
-{
- assert (handle != NULL);
- return handle->length;
-}
-
-/* Returns the number of characters per tab stop for HANDLE, or
- zero if tabs are not to be expanded. Applicable only to
- MODE_TEXT files. */
-size_t
-handle_get_tab_width (const struct file_handle *handle)
-{
- assert (handle != NULL);
- return handle->tab_width;
-}
void
void
fh_done(void)
{
- assert(handle_list);
-
- ll_destroy(handle_list);
- handle_list = 0;
+ if ( handle_list )
+ {
+ ll_destroy(handle_list);
+ handle_list = 0;
+ }
}
projects / pspp-builds.git / blobdiff