-/* PSPP - computes sample statistics.
- Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
- Written by Ben Pfaff <blp@gnu.org>.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 1997-9, 2000, 2009 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 2 of the
- License, or (at your option) any later version.
+ 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.
+ 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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
-#include <libpspp/message.h>
+
+#include <language/data-io/inpt-pgm.h>
+
#include <float.h>
#include <stdlib.h>
-#include <libpspp/alloc.h>
+
#include <data/case.h>
+#include <data/caseinit.h>
+#include <data/casereader-provider.h>
+#include <data/dictionary.h>
+#include <data/procedure.h>
+#include <data/transformations.h>
+#include <data/variable.h>
#include <language/command.h>
-#include <libpspp/compiler.h>
-#include <language/data-io/data-list.h>
#include <language/data-io/data-reader.h>
-#include <data/dictionary.h>
-#include <libpspp/message.h>
-#include <language/expressions/public.h>
#include <language/data-io/file-handle.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/message.h>
#include <libpspp/misc.h>
#include <libpspp/str.h>
-#include <data/variable.h>
-#include <procedure.h>
+
+#include "xalloc.h"
#include "gettext.h"
#define _(msgid) gettext (msgid)
+/* Private result codes for use within INPUT PROGRAM. */
+enum cmd_result_extensions
+ {
+ CMD_END_INPUT_PROGRAM = CMD_PRIVATE_FIRST,
+ CMD_END_CASE
+ };
+
/* Indicates how a `union value' should be initialized. */
enum value_init_type
{
INP_NUMERIC = 01, /* Numeric. */
INP_STRING = 0, /* String. */
-
+
INP_INIT_ONCE = 02, /* Initialize only once. */
INP_REINIT = 0, /* Reinitialize for each iteration. */
};
-struct input_program_pgm
+struct input_program_pgm
{
- enum value_init_type *init; /* How to initialize each `union value'. */
- size_t init_cnt; /* Number of elements in inp_init. */
- size_t case_size; /* Size of case in bytes. */
+ struct trns_chain *trns_chain;
+ enum trns_result restart;
+
+ casenumber case_nr; /* Incremented by END CASE transformation. */
+
+ struct caseinit *init;
+ struct caseproto *proto;
};
-static trns_proc_func end_case_trns_proc, reread_trns_proc, end_file_trns_proc;
+static void destroy_input_program (struct input_program_pgm *);
+static trns_proc_func end_case_trns_proc;
+static trns_proc_func reread_trns_proc;
+static trns_proc_func end_file_trns_proc;
static trns_free_func reread_trns_free;
-int
-cmd_input_program (void)
-{
- discard_variables ();
+static const struct casereader_class input_program_casereader_class;
+
+static bool inside_input_program;
- /* FIXME: we shouldn't do this here, but I'm afraid that other
- code will check the class of vfm_source. */
- vfm_source = create_case_source (&input_program_source_class, NULL);
+/* 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;
+}
- return lex_end_of_command ();
+/* Emits an END CASE transformation for INP. */
+static void
+emit_END_CASE (struct dataset *ds, struct input_program_pgm *inp)
+{
+ add_transformation (ds, end_case_trns_proc, NULL, inp);
}
int
-cmd_end_input_program (void)
+cmd_input_program (struct lexer *lexer, struct dataset *ds)
{
struct input_program_pgm *inp;
- size_t i;
+ bool saw_END_CASE = false;
- if (!case_source_is_class (vfm_source, &input_program_source_class))
+ proc_discard_active_file (ds);
+ if (lex_token (lexer) != '.')
+ return lex_end_of_command (lexer);
+
+ inp = xmalloc (sizeof *inp);
+ inp->trns_chain = NULL;
+ inp->init = NULL;
+ inp->proto = NULL;
+
+ inside_input_program = true;
+ for (;;)
{
- msg (SE, _("No matching INPUT PROGRAM command."));
- return CMD_CASCADING_FAILURE;
+ enum cmd_result result = cmd_parse_in_state (lexer, ds, CMD_STATE_INPUT_PROGRAM);
+ if (result == CMD_END_INPUT_PROGRAM)
+ break;
+ else if (result == CMD_END_CASE)
+ {
+ emit_END_CASE (ds, inp);
+ saw_END_CASE = true;
+ }
+ else if (cmd_result_is_failure (result) && result != CMD_FAILURE)
+ {
+ if (result == CMD_EOF)
+ msg (SE, _("Unexpected end-of-file within INPUT PROGRAM."));
+ inside_input_program = false;
+ proc_discard_active_file (ds);
+ destroy_input_program (inp);
+ return result;
+ }
}
-
- if (dict_get_next_value_idx (default_dict) == 0)
- msg (SW, _("No data-input or transformation commands specified "
- "between INPUT PROGRAM and END INPUT PROGRAM."));
+ if (!saw_END_CASE)
+ emit_END_CASE (ds, inp);
+ inside_input_program = false;
- /* Mark the boundary between INPUT PROGRAM transformations and
- ordinary transformations. */
- f_trns = n_trns;
-
- /* Figure out how to initialize each input case. */
- inp = xmalloc (sizeof *inp);
- inp->init_cnt = dict_get_next_value_idx (default_dict);
- inp->init = xnmalloc (inp->init_cnt, sizeof *inp->init);
- for (i = 0; i < inp->init_cnt; i++)
- inp->init[i] = -1;
- for (i = 0; i < dict_get_var_cnt (default_dict); i++)
+ if (dict_get_next_value_idx (dataset_dict (ds)) == 0)
{
- struct variable *var = dict_get_var (default_dict, i);
- enum value_init_type value_init;
- size_t j;
-
- value_init = var->type == NUMERIC ? INP_NUMERIC : INP_STRING;
- value_init |= var->reinit ? INP_REINIT : INP_INIT_ONCE;
-
- for (j = 0; j < var->nv; j++)
- inp->init[j + var->fv] = value_init;
+ msg (SE, _("Input program did not create any variables."));
+ proc_discard_active_file (ds);
+ destroy_input_program (inp);
+ return CMD_FAILURE;
}
- for (i = 0; i < inp->init_cnt; i++)
- assert (inp->init[i] != -1);
- inp->case_size = dict_get_case_size (default_dict);
- /* Put inp into vfm_source for later use. */
- vfm_source->aux = inp;
+ inp->trns_chain = proc_capture_transformations (ds);
+ trns_chain_finalize (inp->trns_chain);
- return lex_end_of_command ();
-}
+ inp->restart = TRNS_CONTINUE;
-/* Initializes case C. Called before the first case is read. */
-static void
-init_case (const struct input_program_pgm *inp, struct ccase *c)
-{
- size_t i;
+ /* Figure out how to initialize each input case. */
+ inp->init = caseinit_create ();
+ caseinit_mark_for_init (inp->init, dataset_dict (ds));
+ inp->proto = caseproto_ref (dict_get_proto (dataset_dict (ds)));
- for (i = 0; i < inp->init_cnt; i++)
- switch (inp->init[i])
- {
- case INP_NUMERIC | INP_INIT_ONCE:
- case_data_rw (c, i)->f = 0.0;
- break;
- case INP_NUMERIC | INP_REINIT:
- case_data_rw (c, i)->f = SYSMIS;
- break;
- case INP_STRING | INP_INIT_ONCE:
- case INP_STRING | INP_REINIT:
- memset (case_data_rw (c, i)->s, ' ', sizeof case_data_rw (c, i)->s);
- break;
- default:
- assert (0);
- }
+ proc_set_active_file_data (
+ ds, casereader_create_sequential (NULL, inp->proto, CASENUMBER_MAX,
+ &input_program_casereader_class, inp));
+
+ return CMD_SUCCESS;
}
-/* Clears case C. Called between reading successive records. */
-static void
-clear_case (const struct input_program_pgm *inp, struct ccase *c)
+int
+cmd_end_input_program (struct lexer *lexer UNUSED, struct dataset *ds UNUSED)
{
- size_t i;
-
- for (i = 0; i < inp->init_cnt; i++)
- switch (inp->init[i])
- {
- case INP_NUMERIC | INP_INIT_ONCE:
- break;
- case INP_NUMERIC | INP_REINIT:
- case_data_rw (c, i)->f = SYSMIS;
- break;
- case INP_STRING | INP_INIT_ONCE:
- break;
- case INP_STRING | INP_REINIT:
- memset (case_data_rw (c, i)->s, ' ', sizeof case_data_rw (c, i)->s);
- break;
- default:
- assert (0);
- }
+ assert (in_input_program ());
+ return CMD_END_INPUT_PROGRAM;
}
-/* Executes each transformation in turn on a `blank' case.
- Returns true if successful, false if an I/O error occurred. */
+/* Returns true if STATE is valid given the transformations that
+ are allowed within INPUT PROGRAM. */
static bool
-input_program_source_read (struct case_source *source,
- struct ccase *c,
- write_case_func *write_case,
- write_case_data wc_data)
+is_valid_state (enum trns_result state)
{
- struct input_program_pgm *inp = source->aux;
- size_t i;
-
- /* Nonzero if there were any END CASE commands in the set of
- transformations. If so, we don't automatically write out
- cases. */
- int end_case = 0;
-
- /* FIXME? This is the number of cases sent out of the input
- program, not the number of cases written to the procedure.
- The difference should only show up in $CASENUM in COMPUTE.
- We should check behavior against SPSS. */
- int cases_written = 0;
-
- assert (inp != NULL);
-
- /* Figure end_case. */
- for (i = 0; i < f_trns; i++)
- if (t_trns[i].proc == end_case_trns_proc)
- end_case = 1;
+ return (state == TRNS_CONTINUE
+ || state == TRNS_ERROR
+ || state == TRNS_END_FILE
+ || state >= 0);
+}
- /* FIXME: This is an ugly kluge. */
- for (i = 0; i < f_trns; i++)
- if (t_trns[i].proc == repeating_data_trns_proc)
- repeating_data_set_write_case (t_trns[i].private, write_case, wc_data);
+/* 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_;
+ struct ccase *c = case_create (inp->proto);
- init_case (inp, c);
- for (;;)
+ do
{
- /* Perform transformations on `blank' case. */
- for (i = 0; i < f_trns; )
- {
- int code;
-
- if (t_trns[i].proc == end_case_trns_proc)
- {
- cases_written++;
- if (!write_case (wc_data))
- return false;
- clear_case (inp, c);
- i++;
- continue;
- }
-
- code = t_trns[i].proc (t_trns[i].private, c, cases_written + 1);
- switch (code)
- {
- case TRNS_CONTINUE:
- i++;
- break;
-
- case TRNS_DROP_CASE:
- abort ();
-
- case TRNS_ERROR:
- return false;
-
- case TRNS_NEXT_CASE:
- goto next_case;
-
- case TRNS_END_FILE:
- return true;
-
- default:
- i = code;
- break;
- }
- }
-
- /* Write the case if appropriate. */
- if (!end_case)
+ assert (is_valid_state (inp->restart));
+ if (inp->restart == TRNS_ERROR || inp->restart == TRNS_END_FILE)
{
- cases_written++;
- if (!write_case (wc_data))
- return false;
+ case_unref (c);
+ return NULL;
}
- /* Blank out the case for the next iteration. */
- next_case:
- clear_case (inp, c);
+ c = case_unshare (c);
+ caseinit_init_vars (inp->init, c);
+ inp->restart = trns_chain_execute (inp->trns_chain, inp->restart,
+ &c, inp->case_nr);
+ assert (is_valid_state (inp->restart));
+ caseinit_update_left_vars (inp->init, c);
}
+ while (inp->restart < 0);
+
+ return c;
}
-/* Destroys an INPUT PROGRAM source. */
static void
-input_program_source_destroy (struct case_source *source)
+destroy_input_program (struct input_program_pgm *pgm)
{
- struct input_program_pgm *inp = source->aux;
-
- cancel_transformations ();
-
- if (inp != NULL)
+ if (pgm != NULL)
{
- free (inp->init);
- free (inp);
+ trns_chain_destroy (pgm->trns_chain);
+ caseinit_destroy (pgm->init);
+ caseproto_unref (pgm->proto);
+ free (pgm);
}
}
-const struct case_source_class input_program_source_class =
+/* Destroys the casereader. */
+static void
+input_program_casereader_destroy (struct casereader *reader UNUSED, void *inp_)
+{
+ struct input_program_pgm *inp = inp_;
+ if (inp->restart == TRNS_ERROR)
+ casereader_force_error (reader);
+ destroy_input_program (inp);
+}
+
+static const struct casereader_class input_program_casereader_class =
{
- "INPUT PROGRAM",
+ input_program_casereader_read,
+ input_program_casereader_destroy,
+ NULL,
NULL,
- input_program_source_read,
- input_program_source_destroy,
};
\f
int
-cmd_end_case (void)
+cmd_end_case (struct lexer *lexer, struct dataset *ds UNUSED)
{
- if (!case_source_is_class (vfm_source, &input_program_source_class))
- {
- msg (SE, _("This command may only be executed between INPUT PROGRAM "
- "and END INPUT PROGRAM."));
- return CMD_CASCADING_FAILURE;
- }
-
- add_transformation (end_case_trns_proc, NULL, NULL);
-
- return lex_end_of_command ();
+ assert (in_input_program ());
+ if (lex_token (lexer) == '.')
+ return CMD_END_CASE;
+ return lex_end_of_command (lexer);
}
-/* Should never be called, because this is handled in
- input_program_source_read(). */
+/* Outputs the current case */
int
-end_case_trns_proc (void *trns_ UNUSED, struct ccase *c UNUSED,
- int case_num UNUSED)
+end_case_trns_proc (void *inp_, struct ccase **c UNUSED,
+ casenumber case_nr UNUSED)
{
- abort ();
+ struct input_program_pgm *inp = inp_;
+ inp->case_nr++;
+ return TRNS_END_CASE;
}
/* REREAD transformation. */
/* Parses REREAD command. */
int
-cmd_reread (void)
+cmd_reread (struct lexer *lexer, struct dataset *ds)
{
struct file_handle *fh; /* File to be re-read. */
struct expression *e; /* Expression for column to set. */
fh = fh_get_default_handle ();
e = NULL;
- while (token != '.')
+ while (lex_token (lexer) != '.')
{
- if (lex_match_id ("COLUMN"))
+ if (lex_match_id (lexer, "COLUMN"))
{
- lex_match ('=');
-
+ lex_match (lexer, '=');
+
if (e)
{
msg (SE, _("COLUMN subcommand multiply specified."));
expr_free (e);
return CMD_CASCADING_FAILURE;
}
-
- e = expr_parse (default_dict, EXPR_NUMBER);
+
+ e = expr_parse (lexer, ds, EXPR_NUMBER);
if (!e)
return CMD_CASCADING_FAILURE;
}
- else if (lex_match_id ("FILE"))
+ else if (lex_match_id (lexer, "FILE"))
{
- lex_match ('=');
- fh = fh_parse (FH_REF_FILE | FH_REF_INLINE);
+ lex_match (lexer, '=');
+ fh_unref (fh);
+ fh = fh_parse (lexer, FH_REF_FILE | FH_REF_INLINE);
if (fh == NULL)
{
expr_free (e);
return CMD_CASCADING_FAILURE;
}
- lex_get ();
}
else
{
- lex_error (NULL);
+ lex_error (lexer, NULL);
expr_free (e);
+ return CMD_CASCADING_FAILURE;
}
}
t = xmalloc (sizeof *t);
- t->reader = dfm_open_reader (fh);
+ t->reader = dfm_open_reader (fh, lexer);
t->column = e;
- add_transformation (reread_trns_proc, reread_trns_free, t);
+ add_transformation (ds, reread_trns_proc, reread_trns_free, t);
+ fh_unref (fh);
return CMD_SUCCESS;
}
/* Executes a REREAD transformation. */
static int
-reread_trns_proc (void *t_, struct ccase *c, int case_num)
+reread_trns_proc (void *t_, struct ccase **c, casenumber case_num)
{
struct reread_trns *t = t_;
dfm_reread_record (t->reader, 1);
else
{
- double column = expr_evaluate_num (t->column, c, case_num);
- if (!finite (column) || column < 1)
+ 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."));
/* Parses END FILE command. */
int
-cmd_end_file (void)
+cmd_end_file (struct lexer *lexer, struct dataset *ds)
{
- if (!case_source_is_class (vfm_source, &input_program_source_class))
- {
- msg (SE, _("This command may only be executed between INPUT PROGRAM "
- "and END INPUT PROGRAM."));
- return CMD_CASCADING_FAILURE;
- }
+ assert (in_input_program ());
- add_transformation (end_file_trns_proc, NULL, NULL);
+ add_transformation (ds, end_file_trns_proc, NULL, NULL);
- return lex_end_of_command ();
+ return lex_end_of_command (lexer);
}
/* Executes an END FILE transformation. */
static int
-end_file_trns_proc (void *trns_ UNUSED, struct ccase *c UNUSED,
- int case_num UNUSED)
+end_file_trns_proc (void *trns_ UNUSED, struct ccase **c UNUSED,
+ casenumber case_num UNUSED)
{
return TRNS_END_FILE;
}
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