Oops. committing new files

[pspp-builds.git] / src / language / syntax-file.c

diff --git a/src/language/syntax-file.c b/src/language/syntax-file.c
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+/* PSPP - computes sample statistics.
+   Copyright (C) 1997-9, 2000 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
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   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., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA. */
+
+#include <config.h>
+
+#include "syntax-file.h"
+
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include <data/file-name.h>
+#include <data/settings.h>
+#include <data/variable.h>
+#include <language/command.h>
+#include <language/lexer/lexer.h>
+#include <libpspp/alloc.h>
+#include <libpspp/assertion.h>
+#include <libpspp/message.h>
+#include <libpspp/message.h>
+#include <libpspp/str.h>
+#include <libpspp/verbose-msg.h>
+#include <libpspp/version.h>
+#include <output/table.h>
+
+#include <libpspp/ll.h>
+
+#include "prompt.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+#include <libpspp/getl.h>
+
+
+struct syntax_file_source 
+  {
+    struct getl_interface parent ;
+
+    FILE *syntax_file;
+
+    /* Current location. */
+    char *fn;                          /* File name. */
+    int ln;                            /* Line number. */
+  };
+
+static const char *
+name (const struct getl_interface *s)
+{
+  const struct syntax_file_source *sfs = (const struct syntax_file_source *) s;
+  return sfs->fn;
+}
+
+static int
+line_number (const struct getl_interface *s)
+{
+  const struct syntax_file_source *sfs = (const struct syntax_file_source *) s;
+  return sfs->ln;
+}
+
+
+/* Reads a line from syntax file source S into LINE.
+   Returns true if successful, false at end of file. */
+bool
+read_syntax_file (struct getl_interface *s, struct string *line)
+{
+  struct syntax_file_source *sfs = (struct syntax_file_source *) s;
+
+  /* Open file, if not yet opened. */
+  if (sfs->syntax_file == NULL)
+    {
+      verbose_msg (1, _("opening \"%s\" as syntax file"), sfs->fn);
+      sfs->syntax_file = fn_open (sfs->fn, "r");
+
+      if (sfs->syntax_file == NULL)
+        {
+          msg (ME, _("Opening `%s': %s."), sfs->fn, strerror (errno));
+          return false;
+        }
+    }
+
+  /* Read line from file and remove new-line.
+     Skip initial "#! /usr/bin/pspp" line. */
+  do 
+    {
+      sfs->ln++;
+      if (!ds_read_line (line, sfs->syntax_file))
+        {
+          if (ferror (sfs->syntax_file))
+            msg (ME, _("Reading `%s': %s."), sfs->fn, strerror (errno));
+          return false;
+        }
+      ds_chomp (line, '\n');
+    }
+  while (sfs->ln == 1 && !memcmp (ds_cstr (line), "#!", 2));
+
+  /* Echo to listing file, if configured to do so. */
+  if (get_echo ())
+    tab_output_text (TAB_LEFT | TAB_FIX, ds_cstr (line));
+
+  return true;
+}
+
+static void
+syntax_close (struct getl_interface *s)
+{
+  struct syntax_file_source *sfs = (struct syntax_file_source *) s;
+
+  if (sfs->syntax_file && EOF == fn_close (sfs->fn, sfs->syntax_file))
+    msg (MW, _("Closing `%s': %s."), sfs->fn, strerror (errno));
+  free (sfs->fn);
+  free (sfs);
+}
+
+static bool
+always_false (const struct getl_interface *s UNUSED)
+{
+  return false;
+}
+
+
+/* Creates a syntax file source with file name FN. */
+struct getl_interface *
+create_syntax_file_source (const char *fn) 
+{
+  struct syntax_file_source *ss = xzalloc (sizeof (*ss));
+
+  ss->fn = xstrdup (fn);
+
+  ss->parent.interactive = always_false;
+  ss->parent.read = read_syntax_file ;
+  ss->parent.filter = NULL;
+  ss->parent.close = syntax_close ;
+  ss->parent.name = name ;
+  ss->parent.location = line_number;
+
+  return (struct getl_interface *) ss;
+}
+