--- /dev/null
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 1997-9, 2000, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc.
+
+ 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 3 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, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include <float.h>
+#include <stdlib.h>
+
+#include "data/case.h"
+#include "data/caseinit.h"
+#include "data/casereader-provider.h"
+#include "data/dataset.h"
+#include "data/dictionary.h"
+#include "data/session.h"
+#include "data/transformations.h"
+#include "data/variable.h"
+#include "language/command.h"
+#include "language/commands/data-reader.h"
+#include "language/commands/file-handle.h"
+#include "language/commands/inpt-pgm.h"
+#include "language/expressions/public.h"
+#include "language/lexer/lexer.h"
+#include "libpspp/assertion.h"
+#include "libpspp/compiler.h"
+#include "libpspp/message.h"
+#include "libpspp/misc.h"
+#include "libpspp/str.h"
+
+#include "gl/xalloc.h"
+
+#include "gettext.h"
+#define _(msgid) gettext (msgid)
+
+/* Indicates how a `union value' should be initialized. */
+struct input_program_pgm
+ {
+ struct session *session;
+ struct dataset *ds;
+
+ struct trns_chain xforms;
+ size_t idx;
+ bool eof;
+
+ casenumber case_nr; /* Incremented by END CASE transformation. */
+
+ struct caseinit *init;
+ struct caseproto *proto;
+ };
+
+static void destroy_input_program (struct input_program_pgm *);
+static const struct trns_class end_case_trns_class;
+static const struct trns_class reread_trns_class;
+static const struct trns_class end_file_trns_class;
+
+static const struct casereader_class input_program_casereader_class;
+
+static bool inside_input_program;
+static bool saw_END_CASE;
+static bool saw_END_FILE;
+static bool saw_DATA_LIST;
+
+/* Returns true if we're parsing the inside of a INPUT
+ PROGRAM...END INPUT PROGRAM construct, false otherwise. */
+bool
+in_input_program (void)
+{
+ return inside_input_program;
+}
+
+void
+data_list_seen (void)
+{
+ saw_DATA_LIST = true;
+}
+
+/* Emits an END CASE transformation for INP. */
+static void
+emit_END_CASE (struct dataset *ds)
+{
+ add_transformation (ds, &end_case_trns_class, xzalloc (sizeof (bool)));
+}
+
+int
+cmd_input_program (struct lexer *lexer, struct dataset *ds)
+{
+ struct msg_location *location = lex_ofs_location (lexer, 0, 1);
+ if (!lex_match (lexer, T_ENDCMD))
+ {
+ msg_location_destroy (location);
+ return lex_end_of_command (lexer);
+ }
+
+ struct session *session = session_create (dataset_session (ds));
+ struct dataset *inp_ds = dataset_create (session, "INPUT PROGRAM");
+
+ struct input_program_pgm *inp = xmalloc (sizeof *inp);
+ *inp = (struct input_program_pgm) { .session = session, .ds = inp_ds };
+
+ proc_push_transformations (inp->ds);
+ inside_input_program = true;
+ saw_END_CASE = saw_END_FILE = saw_DATA_LIST = false;
+ while (!lex_match_phrase (lexer, "END INPUT PROGRAM"))
+ {
+ enum cmd_result result;
+
+ result = cmd_parse_in_state (lexer, inp->ds, CMD_STATE_INPUT_PROGRAM);
+ if (result == CMD_EOF
+ || result == CMD_FINISH
+ || result == CMD_CASCADING_FAILURE)
+ {
+ proc_pop_transformations (inp->ds, &inp->xforms);
+
+ if (result == CMD_EOF)
+ msg (SE, _("Unexpected end-of-file within %s."), "INPUT PROGRAM");
+ inside_input_program = false;
+ destroy_input_program (inp);
+ msg_location_destroy (location);
+ return result;
+ }
+ }
+ if (!saw_END_CASE)
+ emit_END_CASE (inp->ds);
+ inside_input_program = false;
+ proc_pop_transformations (inp->ds, &inp->xforms);
+
+ struct msg_location *end = lex_ofs_location (lexer, 0, 2);
+ msg_location_merge (&location, end);
+ location->omit_underlines = true;
+ msg_location_destroy (end);
+
+ if (!saw_DATA_LIST && !saw_END_FILE)
+ {
+ msg_at (SE, location, _("Input program does not contain %s or %s."),
+ "DATA LIST", "END FILE");
+ destroy_input_program (inp);
+ msg_location_destroy (location);
+ return CMD_FAILURE;
+ }
+ if (dict_get_next_value_idx (dataset_dict (inp->ds)) == 0)
+ {
+ msg_at (SE, location, _("Input program did not create any variables."));
+ destroy_input_program (inp);
+ msg_location_destroy (location);
+ return CMD_FAILURE;
+ }
+ msg_location_destroy (location);
+
+ /* Figure out how to initialize each input case. */
+ inp->init = caseinit_create ();
+ caseinit_mark_for_init (inp->init, dataset_dict (inp->ds));
+ inp->proto = caseproto_ref (dict_get_proto (dataset_dict (inp->ds)));
+
+ dataset_set_dict (ds, dict_clone (dataset_dict (inp->ds)));
+ dataset_set_source (
+ ds, casereader_create_sequential (NULL, inp->proto, CASENUMBER_MAX,
+ &input_program_casereader_class, inp));
+
+ return CMD_SUCCESS;
+}
+
+/* Reads and returns one case.
+ Returns the case if successful, null at end of file or if an
+ I/O error occurred. */
+static struct ccase *
+input_program_casereader_read (struct casereader *reader UNUSED, void *inp_)
+{
+ struct input_program_pgm *inp = inp_;
+
+ if (inp->eof || !inp->xforms.n)
+ return NULL;
+
+ struct ccase *c = case_create (inp->proto);
+ caseinit_init_vars (inp->init, c);
+
+ for (size_t i = inp->idx < inp->xforms.n ? inp->idx : 0; ; i++)
+ {
+ if (i >= inp->xforms.n)
+ {
+ i = 0;
+ c = case_unshare (c);
+ caseinit_update_left_vars (inp->init, c);
+ caseinit_init_vars (inp->init, c);
+ }
+
+ const struct transformation *trns = &inp->xforms.xforms[i];
+ switch (trns->class->execute (trns->aux, &c, inp->case_nr))
+ {
+ case TRNS_END_CASE:
+ inp->case_nr++;
+ inp->idx = i;
+ return c;
+
+ case TRNS_ERROR:
+ casereader_force_error (reader);
+ /* Fall through. */
+ case TRNS_END_FILE:
+ inp->eof = true;
+ case_unref (c);
+ return NULL;
+
+ case TRNS_CONTINUE:
+ break;
+
+ default:
+ NOT_REACHED ();
+ }
+ }
+}
+
+static void
+destroy_input_program (struct input_program_pgm *pgm)
+{
+ if (pgm != NULL)
+ {
+ session_destroy (pgm->session);
+ trns_chain_uninit (&pgm->xforms);
+ caseinit_destroy (pgm->init);
+ caseproto_unref (pgm->proto);
+ free (pgm);
+ }
+}
+
+/* Destroys the casereader. */
+static void
+input_program_casereader_destroy (struct casereader *reader UNUSED, void *inp_)
+{
+ struct input_program_pgm *inp = inp_;
+ destroy_input_program (inp);
+}
+
+static const struct casereader_class input_program_casereader_class =
+ {
+ input_program_casereader_read,
+ input_program_casereader_destroy,
+ NULL,
+ NULL,
+ };
+\f
+int
+cmd_end_case (struct lexer *lexer UNUSED, struct dataset *ds)
+{
+ assert (in_input_program ());
+ emit_END_CASE (ds);
+ saw_END_CASE = true;
+ return CMD_SUCCESS;
+}
+
+/* Outputs the current case */
+static enum trns_result
+end_case_trns_proc (void *resume_, struct ccase **c UNUSED,
+ casenumber case_nr UNUSED)
+{
+ bool *resume = resume_;
+ enum trns_result retval = *resume ? TRNS_CONTINUE : TRNS_END_CASE;
+ *resume = !*resume;
+ return retval;
+}
+
+static bool
+end_case_trns_free (void *resume)
+{
+ free (resume);
+ return true;
+}
+
+static const struct trns_class end_case_trns_class = {
+ .name = "END CASE",
+ .execute = end_case_trns_proc,
+ .destroy = end_case_trns_free,
+};
+
+/* REREAD transformation. */
+struct reread_trns
+ {
+ struct dfm_reader *reader; /* File to move file pointer back on. */
+ struct expression *column; /* Column to reset file pointer to. */
+ };
+
+/* Parses REREAD command. */
+int
+cmd_reread (struct lexer *lexer, struct dataset *ds)
+{
+ char *encoding = NULL;
+ struct file_handle *fh = fh_get_default_handle ();
+ struct expression *e = NULL;
+ while (lex_token (lexer) != T_ENDCMD)
+ {
+ if (lex_match_id (lexer, "COLUMN"))
+ {
+ lex_match (lexer, T_EQUALS);
+
+ if (e)
+ {
+ lex_sbc_only_once (lexer, "COLUMN");
+ goto error;
+ }
+
+ e = expr_parse (lexer, ds, VAL_NUMERIC);
+ if (!e)
+ goto error;
+ }
+ else if (lex_match_id (lexer, "FILE"))
+ {
+ lex_match (lexer, T_EQUALS);
+ fh_unref (fh);
+ fh = fh_parse (lexer, FH_REF_FILE | FH_REF_INLINE, NULL);
+ if (fh == NULL)
+ goto error;
+ }
+ else if (lex_match_id (lexer, "ENCODING"))
+ {
+ lex_match (lexer, T_EQUALS);
+ if (!lex_force_string (lexer))
+ goto error;
+
+ free (encoding);
+ encoding = ss_xstrdup (lex_tokss (lexer));
+
+ lex_get (lexer);
+ }
+ else
+ {
+ lex_error_expecting (lexer, "COLUMN", "FILE", "ENCODING");
+ goto error;
+ }
+ }
+
+ struct reread_trns *t = xmalloc (sizeof *t);
+ *t = (struct reread_trns) {
+ .reader = dfm_open_reader (fh, lexer, encoding),
+ .column = e,
+ };
+ add_transformation (ds, &reread_trns_class, t);
+
+ fh_unref (fh);
+ free (encoding);
+ return CMD_SUCCESS;
+
+error:
+ expr_free (e);
+ free (encoding);
+ return CMD_CASCADING_FAILURE;
+}
+
+/* Executes a REREAD transformation. */
+static enum trns_result
+reread_trns_proc (void *t_, struct ccase **c, casenumber case_num)
+{
+ struct reread_trns *t = t_;
+
+ if (t->column == NULL)
+ dfm_reread_record (t->reader, 1);
+ else
+ {
+ double column = expr_evaluate_num (t->column, *c, case_num);
+ if (!isfinite (column) || column < 1)
+ {
+ msg (SE, _("REREAD: Column numbers must be positive finite "
+ "numbers. Column set to 1."));
+ dfm_reread_record (t->reader, 1);
+ }
+ else
+ dfm_reread_record (t->reader, column);
+ }
+ return TRNS_CONTINUE;
+}
+
+/* Frees a REREAD transformation.
+ Returns true if successful, false if an I/O error occurred. */
+static bool
+reread_trns_free (void *t_)
+{
+ struct reread_trns *t = t_;
+ expr_free (t->column);
+ dfm_close_reader (t->reader);
+ return true;
+}
+
+static const struct trns_class reread_trns_class = {
+ .name = "REREAD",
+ .execute = reread_trns_proc,
+ .destroy = reread_trns_free,
+};
+
+/* Parses END FILE command. */
+int
+cmd_end_file (struct lexer *lexer UNUSED, struct dataset *ds)
+{
+ assert (in_input_program ());
+
+ add_transformation (ds, &end_file_trns_class, NULL);
+ saw_END_FILE = true;
+
+ return CMD_SUCCESS;
+}
+
+/* Executes an END FILE transformation. */
+static enum trns_result
+end_file_trns_proc (void *trns_ UNUSED, struct ccase **c UNUSED,
+ casenumber case_num UNUSED)
+{
+ return TRNS_END_FILE;
+}
+
+static const struct trns_class end_file_trns_class = {
+ .name = "END FILE",
+ .execute = end_file_trns_proc,
+};
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