+++ /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/data-io/data-reader.h"
-#include "language/data-io/file-handle.h"
-#include "language/data-io/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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