/* PSPP - computes sample statistics.
Copyright (C) 1997-9, 2000, 2006 Free Software Foundation, Inc.
- Written by Ben Pfaff <blp@gnu.org>.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
02110-1301, USA. */
#include <stdlib.h>
-
#include <config.h>
#include "getl.h"
#include <libpspp/version.h>
#include <libpspp/alloc.h>
-#include <data/file-name.h>
-
struct getl_source
{
struct getl_source *included_from; /* File that this is nested inside. */
struct getl_interface *interface;
};
-/* List of source files. */
-static struct ll_list sources ;
+struct source_stream
+ {
+ struct ll_list sources ; /* List of source files. */
-static struct string the_include_path;
+ struct string the_include_path;
+ };
const char *
-getl_include_path (void)
+getl_include_path (const struct source_stream *ss)
{
- return ds_cstr (&the_include_path);
+ return ds_cstr (&ss->the_include_path);
}
static struct getl_source *
-current_source (struct ll_list *list)
+current_source (const struct source_stream *ss)
{
- const struct ll *ll = ll_head (list);
+ const struct ll *ll = ll_head (&ss->sources);
return ll_data (ll, struct getl_source, ll );
}
/* Initialize getl. */
-void
-getl_initialize (void)
+struct source_stream *
+create_source_stream (const char *initial_include_path)
{
- ll_init (&sources);
- ds_init_cstr (&the_include_path,
+ struct source_stream *ss = xzalloc (sizeof (*ss));
+ ll_init (&ss->sources);
+#if 0
+ ds_init_cstr (&ss->the_include_path,
fn_getenv_default ("STAT_INCLUDE_PATH", include_path));
+#endif
+ ds_init_cstr (&ss->the_include_path, initial_include_path);
+
+ return ss;
}
/* Delete everything from the include path. */
void
-getl_clear_include_path (void)
+getl_clear_include_path (struct source_stream *ss)
{
- ds_clear (&the_include_path);
+ ds_clear (&ss->the_include_path);
}
/* Add to the include path. */
void
-getl_add_include_dir (const char *path)
+getl_add_include_dir (struct source_stream *ss, const char *path)
{
- if (ds_length (&the_include_path))
- ds_put_char (&the_include_path, ':');
+ if (ds_length (&ss->the_include_path))
+ ds_put_char (&ss->the_include_path, ':');
- ds_put_cstr (&the_include_path, path);
+ ds_put_cstr (&ss->the_include_path, path);
}
/* Appends source S to the list of source files. */
void
-getl_append_source (struct getl_interface *i)
+getl_append_source (struct source_stream *ss, struct getl_interface *i)
{
struct getl_source *s = xzalloc (sizeof ( struct getl_source ));
s->interface = i ;
- ll_push_head (&sources, &s->ll);
+ ll_push_head (&ss->sources, &s->ll);
}
/* Nests source S within the current source file. */
void
-getl_include_source (struct getl_interface *i)
+getl_include_source (struct source_stream *ss, struct getl_interface *i)
{
- struct getl_source *current = current_source (&sources);
+ struct getl_source *current = current_source (ss);
struct getl_source *s = xzalloc (sizeof ( struct getl_source ));
s->interface = i;
s->includes = NULL;
current->includes = s;
- ll_push_head (&sources, &s->ll);
+ ll_push_head (&ss->sources, &s->ll);
}
/* Closes the current source, and move the current source to the
next file in the chain. */
static void
-close_source (void)
+close_source (struct source_stream *ss)
{
- struct getl_source *s = current_source (&sources);
+ struct getl_source *s = current_source (ss);
if ( s->interface->close )
s->interface->close (s->interface);
- ll_pop_head (&sources);
+ ll_pop_head (&ss->sources);
if (s->included_from != NULL)
- current_source (&sources)->includes = NULL;
+ current_source (ss)->includes = NULL;
free (s);
}
/* Closes all sources until an interactive source is
encountered. */
void
-getl_abort_noninteractive (void)
+getl_abort_noninteractive (struct source_stream *ss)
{
- while ( ! ll_is_empty (&sources))
+ while ( ! ll_is_empty (&ss->sources))
{
- const struct getl_source *s = current_source (&sources);
+ const struct getl_source *s = current_source (ss);
if ( !s->interface->interactive (s->interface) )
- close_source ();
+ close_source (ss);
}
}
/* Returns true if the current source is interactive,
false otherwise. */
bool
-getl_is_interactive (void)
+getl_is_interactive (const struct source_stream *ss)
{
- const struct getl_source *s = current_source (&sources);
+ const struct getl_source *s = current_source (ss);
- if (ll_is_empty (&sources) )
+ if (ll_is_empty (&ss->sources) )
return false;
return s->interface->interactive (s->interface);
/* Returns the name of the current source, or NULL if there is no
current source */
const char *
-getl_source_name (void)
+getl_source_name (const struct source_stream *ss)
{
- const struct getl_source *s = current_source (&sources);
+ const struct getl_source *s = current_source (ss);
- if ( ll_is_empty (&sources) )
+ if ( ll_is_empty (&ss->sources) )
return NULL;
if ( ! s->interface->name )
/* Returns the location within the current source, or -1 if there is
no current source */
int
-getl_source_location (void)
+getl_source_location (const struct source_stream *ss)
{
- const struct getl_source *s = current_source (&sources);
+ const struct getl_source *s = current_source (ss);
- if ( ll_is_empty (&sources) )
+ if ( ll_is_empty (&ss->sources) )
return -1;
if ( !s->interface->location )
/* Close getl. */
void
-getl_uninitialize (void)
+destroy_source_stream (struct source_stream *ss)
{
- while ( !ll_is_empty (&sources))
- close_source ();
- ds_destroy (&the_include_path);
+ while ( !ll_is_empty (&ss->sources))
+ close_source (ss);
+ ds_destroy (&ss->the_include_path);
+
+ free (ss);
}
/* Reads a single line into LINE.
Returns true when a line has been read, false at end of input.
- If INTERACTIVE is non-null, then when true is returned
- *INTERACTIVE will be set to true if the line was obtained
- interactively, false otherwise. */
+ On success, sets *SYNTAX to the style of the syntax read. */
bool
-do_read_line (struct string *line, bool *interactive)
+getl_read_line (struct source_stream *ss, struct string *line,
+ enum getl_syntax *syntax)
{
- while (!ll_is_empty (&sources))
+ while (!ll_is_empty (&ss->sources))
{
- struct getl_source *s = current_source (&sources);
+ struct getl_source *s = current_source (ss);
ds_clear (line);
- if (s->interface->read (s->interface, line))
+ if (s->interface->read (s->interface, line, syntax))
{
- if (interactive != NULL)
- *interactive = s->interface->interactive (s->interface);
-
while (s)
{
if (s->interface->filter)
- s->interface->filter (s->interface, line);
+ s->interface->filter (s->interface, line, *syntax);
s = s->included_from;
}
-
+
return true;
}
- close_source ();
+ close_source (ss);
}
return false;
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