-/* 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 <float.h>
#include <limits.h>
#include <stdlib.h>
-#ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
-#endif
-#include <data/case-sink.h>
-#include <data/case-source.h>
#include <data/case.h>
+#include <data/casereader.h>
+#include <data/casereader-provider.h>
#include <data/dictionary.h>
#include <data/procedure.h>
#include <data/settings.h>
+#include <data/short-names.h>
#include <data/value.h>
#include <data/variable.h>
#include <language/command.h>
#include <language/lexer/lexer.h>
#include <language/lexer/variable-parser.h>
-#include <libpspp/alloc.h>
#include <libpspp/array.h>
#include <libpspp/assertion.h>
#include <libpspp/message.h>
-#include <libpspp/message.h>
#include <libpspp/misc.h>
#include <libpspp/pool.h>
#include <libpspp/str.h>
-
+#include <data/data-in.h>
+#include <data/data-out.h>
#include "intprops.h"
+#include "minmax.h"
+#include "xalloc.h"
#include "gettext.h"
#define _(msgid) gettext (msgid)
/* List of variable names. */
-struct varname
+struct var_names
{
- struct varname *next;
- char name[SHORT_NAME_LEN + 1];
+ const char **names;
+ size_t n_names, allocated_names;
};
+static void var_names_init (struct var_names *);
+static void var_names_add (struct pool *, struct var_names *, const char *);
+
/* Represents a FLIP input program. */
-struct flip_pgm
+struct flip_pgm
{
struct pool *pool; /* Pool containing FLIP data. */
- struct variable **var; /* Variables to transpose. */
- int *idx_to_fv; /* var[]->index to compacted sink case fv. */
- size_t var_cnt; /* Number of elements in `var'. */
- int case_cnt; /* Pre-flip case count. */
- size_t case_size; /* Post-flip bytes per case. */
-
- union value *output_buf; /* Case output buffer. */
+ size_t n_vars; /* Pre-flip number of variables. */
+ int n_cases; /* Pre-flip number of cases. */
- struct variable *new_names; /* Variable containing new variable names. */
- struct varname *new_names_head; /* First new variable. */
- struct varname *new_names_tail; /* Last new variable. */
+ struct variable *new_names_var; /* Variable with new variable names. */
+ struct dictionary *dict; /* Dictionary of the names */
+ struct var_names old_names; /* Variable names before FLIP. */
+ struct var_names new_names; /* Variable names after FLIP. */
FILE *file; /* Temporary file containing data. */
+ size_t cases_read; /* Number of cases already read. */
+ bool error; /* Error reading temporary file? */
};
+static const struct casereader_class flip_casereader_class;
+
static void destroy_flip_pgm (struct flip_pgm *);
-static struct case_sink *flip_sink_create (struct flip_pgm *);
-static struct case_source *flip_source_create (struct flip_pgm *);
static bool flip_file (struct flip_pgm *);
-static int build_dictionary (struct flip_pgm *);
-
-static const struct case_source_class flip_source_class;
-static const struct case_sink_class flip_sink_class;
+static void make_new_var (struct dictionary *, const char *name);
/* Parses and executes FLIP. */
int
-cmd_flip (void)
+cmd_flip (struct lexer *lexer, struct dataset *ds)
{
+ struct dictionary *dict = dataset_dict (ds);
+ const struct variable **vars;
struct flip_pgm *flip;
- struct case_sink *sink;
+ struct casereader *input, *reader;
+ struct ccase *c;
+ size_t i;
bool ok;
- if (proc_make_temporary_transformations_permanent ())
+ if (proc_make_temporary_transformations_permanent (ds))
msg (SW, _("FLIP ignores TEMPORARY. "
"Temporary transformations will be made permanent."));
flip = pool_create_container (struct flip_pgm, pool);
- flip->var = NULL;
- flip->idx_to_fv = dict_get_compacted_idx_to_fv (default_dict);
- pool_register (flip->pool, free, flip->idx_to_fv);
- flip->var_cnt = 0;
- flip->case_cnt = 0;
- flip->new_names = NULL;
- flip->new_names_head = NULL;
- flip->new_names_tail = NULL;
+ flip->n_vars = 0;
+ flip->n_cases = 0;
+ flip->new_names_var = NULL;
+ var_names_init (&flip->old_names);
+ var_names_init (&flip->new_names);
flip->file = NULL;
+ flip->cases_read = 0;
+ flip->error = false;
+ flip->dict = dict;
- lex_match ('/');
- if (lex_match_id ("VARIABLES"))
+ lex_match (lexer, '/');
+ if (lex_match_id (lexer, "VARIABLES"))
{
- lex_match ('=');
- if (!parse_variables (default_dict, &flip->var, &flip->var_cnt,
- PV_NO_DUPLICATE))
+ lex_match (lexer, '=');
+ if (!parse_variables_const (lexer, dict, &vars, &flip->n_vars,
+ PV_NO_DUPLICATE))
goto error;
- lex_match ('/');
+ lex_match (lexer, '/');
}
else
- dict_get_vars (default_dict, &flip->var, &flip->var_cnt, 1u << DC_SYSTEM);
- pool_register (flip->pool, free, flip->var);
+ dict_get_vars (dict, &vars, &flip->n_vars, DC_SYSTEM);
+ pool_register (flip->pool, free, vars);
- lex_match ('/');
- if (lex_match_id ("NEWNAMES"))
+ lex_match (lexer, '/');
+ if (lex_match_id (lexer, "NEWNAMES"))
{
- lex_match ('=');
- flip->new_names = parse_variable ();
- if (!flip->new_names)
+ lex_match (lexer, '=');
+ flip->new_names_var = parse_variable (lexer, dict);
+ if (!flip->new_names_var)
goto error;
}
else
- flip->new_names = dict_lookup_var (default_dict, "CASE_LBL");
+ flip->new_names_var = dict_lookup_var (dict, "CASE_LBL");
- if (flip->new_names)
+ if (flip->new_names_var)
{
- size_t i;
-
- for (i = 0; i < flip->var_cnt; i++)
- if (flip->var[i] == flip->new_names)
+ for (i = 0; i < flip->n_vars; i++)
+ if (vars[i] == flip->new_names_var)
{
- remove_element (flip->var, flip->var_cnt, sizeof *flip->var, i);
- flip->var_cnt--;
+ remove_element (vars, flip->n_vars, sizeof *vars, i);
+ flip->n_vars--;
break;
}
}
+ flip->file = pool_tmpfile (flip->pool);
+ if (flip->file == NULL)
+ {
+ msg (SE, _("Could not create temporary file for FLIP."));
+ goto error;
+ }
+
+ /* Save old variable names for use as values of CASE_LBL
+ variable in flipped file. */
+ for (i = 0; i < flip->n_vars; i++)
+ var_names_add (flip->pool, &flip->old_names,
+ pool_strdup (flip->pool, var_get_name (vars[i])));
+
/* Read the active file into a flip_sink. */
- flip->case_cnt = 0;
- proc_make_temporary_transformations_permanent ();
- sink = flip_sink_create (flip);
- if (sink == NULL)
- goto error;
- proc_set_sink (sink);
- flip->new_names_tail = NULL;
- ok = procedure (NULL, NULL);
+ proc_discard_output (ds);
- /* Flip the data we read. */
- if (!flip_file (flip))
+ input = proc_open (ds);
+ while ((c = casereader_read (input)) != NULL)
{
- discard_variables ();
- goto error;
+ flip->n_cases++;
+ for (i = 0; i < flip->n_vars; i++)
+ {
+ const struct variable *v = vars[i];
+ double out = var_is_numeric (v) ? case_num (c, v) : SYSMIS;
+ fwrite (&out, sizeof out, 1, flip->file);
+ }
+ if (flip->new_names_var != NULL)
+ {
+ const union value *value = case_data (c, flip->new_names_var);
+ const char *name;
+ if (var_is_numeric (flip->new_names_var))
+ {
+ double f = value->f;
+ name = (f == SYSMIS ? "VSYSMIS"
+ : f < INT_MIN ? "VNEGINF"
+ : f > INT_MAX ? "VPOSINF"
+ : pool_asprintf (flip->pool, "V%d", (int) f));
+ }
+ else
+ {
+ name = data_out_pool (value, dict_get_encoding (flip->dict), var_get_write_format (flip->new_names_var),
+ flip->pool);
+
+ }
+ var_names_add (flip->pool, &flip->new_names, name);
+ }
+ case_unref (c);
}
+ ok = casereader_destroy (input);
+ ok = proc_commit (ds) && ok;
- /* Flip the dictionary. */
- dict_clear (default_dict);
- if (!build_dictionary (flip))
+ /* Flip the data we read. */
+ if (!ok || !flip_file (flip))
{
- discard_variables ();
+ proc_discard_active_file (ds);
goto error;
}
- flip->case_size = dict_get_case_size (default_dict);
- /* Set up flipped data for reading. */
- proc_set_source (flip_source_create (flip));
+ /* Flip the dictionary. */
+ dict_clear (dict);
+ dict_create_var_assert (dict, "CASE_LBL", 8);
+ for (i = 0; i < flip->n_cases; i++)
+ if (flip->new_names.n_names)
+ make_new_var (dict, flip->new_names.names[i]);
+ else
+ {
+ char s[VAR_NAME_LEN + 1];
+ sprintf (s, "VAR%03d", i);
+ dict_create_var_assert (dict, s, 0);
+ }
- return ok ? lex_end_of_command () : CMD_CASCADING_FAILURE;
+ /* Set up flipped data for reading. */
+ reader = casereader_create_sequential (NULL, dict_get_proto (dict),
+ flip->n_vars,
+ &flip_casereader_class, flip);
+ proc_set_active_file_data (ds, reader);
+ return lex_end_of_command (lexer);
error:
destroy_flip_pgm (flip);
/* Destroys FLIP. */
static void
-destroy_flip_pgm (struct flip_pgm *flip)
+destroy_flip_pgm (struct flip_pgm *flip)
{
if (flip != NULL)
pool_destroy (flip->pool);
}
/* Make a new variable with base name NAME, which is bowdlerized and
- mangled until acceptable, and returns success. */
-static int
-make_new_var (char name[])
+ mangled until acceptable. */
+static void
+make_new_var (struct dictionary *dict, const char *name_)
{
+ char *name = xstrdup (name_);
char *cp;
/* Trim trailing spaces. */
*--cp = '\0';
/* Fix invalid characters. */
- for (cp = name; *cp && cp < name + SHORT_NAME_LEN; cp++)
- if (cp == name)
+ for (cp = name; *cp && cp < name + VAR_NAME_LEN; cp++)
+ if (cp == name)
{
if (!lex_is_id1 (*cp) || *cp == '$')
*cp = 'V';
else
{
if (!lex_is_idn (*cp))
- *cp = '_';
+ *cp = '_';
}
*cp = '\0';
str_uppercase (name);
-
- if (dict_create_var (default_dict, name, 0))
- return 1;
-
- /* Add numeric extensions until acceptable. */
- {
- const int len = (int) strlen (name);
- char n[SHORT_NAME_LEN + 1];
- int i;
-
- for (i = 1; i < 10000000; i++)
- {
- int ofs = min (7 - intlog10 (i), len);
- memcpy (n, name, ofs);
- sprintf (&n[ofs], "%d", i);
-
- if (dict_create_var (default_dict, n, 0))
- return 1;
- }
- }
-
- msg (SE, _("Could not create acceptable variant for variable %s."), name);
- return 0;
-}
-
-/* Make a new dictionary for all the new variable names. */
-static int
-build_dictionary (struct flip_pgm *flip)
-{
- dict_create_var_assert (default_dict, "CASE_LBL", 8);
- if (flip->new_names_head == NULL)
+ /* Use the mangled name, if it is available, or add numeric
+ extensions until we find one that is. */
+ if (!dict_create_var (dict, name, 0))
{
+ int len = strlen (name);
int i;
-
- if (flip->case_cnt > 99999)
- {
- msg (SE, _("Cannot create more than 99999 variable names."));
- return 0;
- }
-
- for (i = 0; i < flip->case_cnt; i++)
- {
- struct variable *v;
- char s[SHORT_NAME_LEN + 1];
-
- sprintf (s, "VAR%03d", i);
- v = dict_create_var_assert (default_dict, s, 0);
- }
- }
- else
- {
- struct varname *v;
-
- for (v = flip->new_names_head; v; v = v->next)
- if (!make_new_var (v->name))
- return 0;
- }
-
- return 1;
-}
-
-/* Creates a flip sink based on FLIP. */
-static struct case_sink *
-flip_sink_create (struct flip_pgm *flip)
-{
- size_t i;
-
- flip->output_buf = pool_nalloc (flip->pool,
- flip->var_cnt, sizeof *flip->output_buf);
-
- flip->file = pool_tmpfile (flip->pool);
- if (flip->file == NULL)
- {
- msg (SE, _("Could not create temporary file for FLIP."));
- return NULL;
- }
-
- /* Write variable names as first case. */
- for (i = 0; i < flip->var_cnt; i++)
- buf_copy_str_rpad (flip->output_buf[i].s, MAX_SHORT_STRING,
- flip->var[i]->name);
- if (fwrite (flip->output_buf, sizeof *flip->output_buf,
- flip->var_cnt, flip->file) != (size_t) flip->var_cnt)
- {
- msg (SE, _("Error writing FLIP file: %s."), strerror (errno));
- return NULL;
- }
-
- flip->case_cnt = 1;
-
- return create_case_sink (&flip_sink_class, default_dict, flip);
-}
-
-/* Writes case C to the FLIP sink.
- Returns true if successful, false if an I/O error occurred. */
-static bool
-flip_sink_write (struct case_sink *sink, const struct ccase *c)
-{
- struct flip_pgm *flip = sink->aux;
- size_t i;
-
- flip->case_cnt++;
-
- if (flip->new_names != NULL)
- {
- struct varname *v = pool_alloc (flip->pool, sizeof *v);
- v->next = NULL;
- if (flip->new_names->type == NUMERIC)
+ for (i = 1; ; i++)
{
- double f = case_num (c, flip->idx_to_fv[flip->new_names->index]);
-
- if (f == SYSMIS)
- strcpy (v->name, "VSYSMIS");
- else if (f < INT_MIN)
- strcpy (v->name, "VNEGINF");
- else if (f > INT_MAX)
- strcpy (v->name, "VPOSINF");
- else
- snprintf (v->name, sizeof v->name, "V%d", (int) f);
- }
- else
- {
- int width = min (flip->new_names->width, MAX_SHORT_STRING);
- memcpy (v->name, case_str (c, flip->idx_to_fv[flip->new_names->index]),
- width);
- v->name[width] = 0;
- }
-
- if (flip->new_names_head == NULL)
- flip->new_names_head = v;
- else
- flip->new_names_tail->next = v;
- flip->new_names_tail = v;
- }
+ char n[VAR_NAME_LEN + 1];
+ int ofs = MIN (VAR_NAME_LEN - 1 - intlog10 (i), len);
+ strncpy (n, name, ofs);
+ sprintf (&n[ofs], "%d", i);
- /* Write to external file. */
- for (i = 0; i < flip->var_cnt; i++)
- {
- double out;
-
- if (flip->var[i]->type == NUMERIC)
- out = case_num (c, flip->idx_to_fv[flip->var[i]->index]);
- else
- out = SYSMIS;
- flip->output_buf[i].f = out;
- }
-
- if (fwrite (flip->output_buf, sizeof *flip->output_buf,
- flip->var_cnt, flip->file) != (size_t) flip->var_cnt)
- {
- msg (SE, _("Error writing FLIP file: %s."), strerror (errno));
- return false;
+ if (dict_create_var (dict, n, 0))
+ break;
+ }
}
- return true;
+ free (name);
}
/* Transposes the external file into a new file. */
size_t case_bytes;
size_t case_capacity;
size_t case_idx;
- union value *input_buf, *output_buf;
+ double *input_buf, *output_buf;
FILE *input_file, *output_file;
/* Allocate memory for many cases. */
- case_bytes = flip->var_cnt * sizeof *input_buf;
- case_capacity = get_workspace () / case_bytes;
- if (case_capacity > flip->case_cnt * 2)
- case_capacity = flip->case_cnt * 2;
+ case_bytes = flip->n_vars * sizeof *input_buf;
+ case_capacity = settings_get_workspace () / case_bytes;
+ if (case_capacity > flip->n_cases * 2)
+ case_capacity = flip->n_cases * 2;
if (case_capacity < 2)
case_capacity = 2;
for (;;)
/* Use half the allocated memory for input_buf, half for
output_buf. */
case_capacity /= 2;
- output_buf = input_buf + flip->var_cnt * case_capacity;
+ output_buf = input_buf + flip->n_vars * case_capacity;
input_file = flip->file;
- if (fseek (input_file, 0, SEEK_SET) != 0)
+ if (fseek (input_file, 0, SEEK_SET) != 0)
{
msg (SE, _("Error rewinding FLIP file: %s."), strerror (errno));
return false;
}
-
+
output_file = pool_tmpfile (flip->pool);
- if (output_file == NULL)
+ if (output_file == NULL)
{
msg (SE, _("Error creating FLIP source file."));
return false;
}
-
- for (case_idx = 0; case_idx < flip->case_cnt; )
+
+ for (case_idx = 0; case_idx < flip->n_cases; )
{
- unsigned long read_cases = min (flip->case_cnt - case_idx,
+ unsigned long read_cases = MIN (flip->n_cases - case_idx,
case_capacity);
size_t i;
- if (read_cases != fread (input_buf, case_bytes, read_cases, input_file))
+ if (read_cases != fread (input_buf, case_bytes, read_cases, input_file))
{
- msg (SE, _("Error reading FLIP file: %s."), strerror (errno));
+ if (ferror (input_file))
+ msg (SE, _("Error reading FLIP file: %s."), strerror (errno));
+ else
+ msg (SE, _("Unexpected end of file reading FLIP file."));
return false;
}
- for (i = 0; i < flip->var_cnt; i++)
+ for (i = 0; i < flip->n_vars; i++)
{
unsigned long j;
-
- for (j = 0; j < read_cases; j++)
- output_buf[j] = input_buf[i + j * flip->var_cnt];
-#ifndef HAVE_FSEEKO
-#define fseeko fseek
-#endif
-
-#ifndef HAVE_OFF_T
-#define off_t long int
-#endif
+ for (j = 0; j < read_cases; j++)
+ output_buf[j] = input_buf[i + j * flip->n_vars];
if (fseeko (output_file,
sizeof *input_buf * (case_idx
- + (off_t) i * flip->case_cnt),
- SEEK_SET) != 0)
+ + (off_t) i * flip->n_cases),
+ SEEK_SET) != 0)
{
msg (SE, _("Error seeking FLIP source file: %s."),
strerror (errno));
}
if (fwrite (output_buf, sizeof *output_buf, read_cases, output_file)
- != read_cases)
+ != read_cases)
{
msg (SE, _("Error writing FLIP source file: %s."),
strerror (errno));
- return false;
+ return false;
}
}
}
pool_unregister (flip->pool, input_buf);
free (input_buf);
-
- if (fseek (output_file, 0, SEEK_SET) != 0)
+
+ if (fseek (output_file, 0, SEEK_SET) != 0)
{
msg (SE, _("Error rewinding FLIP source file: %s."), strerror (errno));
- return false;
+ return false;
}
flip->file = output_file;
return true;
}
-/* FLIP sink class. */
-static const struct case_sink_class flip_sink_class =
- {
- "FLIP",
- NULL,
- flip_sink_write,
- NULL,
- NULL,
- };
-
-/* Creates and returns a FLIP source based on PGM,
- which should have already been used as a sink. */
-static struct case_source *
-flip_source_create (struct flip_pgm *pgm)
-{
- return create_case_source (&flip_source_class, pgm);
-}
-
-/* Reads the FLIP stream. Copies each case into C and calls
- WRITE_CASE passing WC_DATA.
- Returns true if successful, false if an I/O error occurred. */
-static bool
-flip_source_read (struct case_source *source,
- struct ccase *c,
- write_case_func *write_case, write_case_data wc_data)
+/* Reads and returns one case.
+ Returns a null pointer at end of file or if an I/O error occurred. */
+static struct ccase *
+flip_casereader_read (struct casereader *reader, void *flip_)
{
- struct flip_pgm *flip = source->aux;
- union value *input_buf;
+ struct flip_pgm *flip = flip_;
+ struct ccase *c;
size_t i;
- bool ok = true;
- input_buf = xnmalloc (flip->case_cnt, sizeof *input_buf);
- for (i = 0; ok && i < flip->var_cnt; i++)
+ if (flip->error || flip->cases_read >= flip->n_vars)
+ return false;
+
+ c = case_create (casereader_get_proto (reader));
+ data_in (ss_cstr (flip->old_names.names[flip->cases_read]), dict_get_encoding (flip->dict),
+ FMT_A, 0,
+ 0, 0,
+ flip->dict,
+ case_data_rw_idx (c, 0), 8);
+
+ for (i = 0; i < flip->n_cases; i++)
{
- size_t j;
-
- if (fread (input_buf, sizeof *input_buf, flip->case_cnt,
- flip->file) != flip->case_cnt)
+ double in;
+ if (fread (&in, sizeof in, 1, flip->file) != 1)
{
+ case_unref (c);
if (ferror (flip->file))
msg (SE, _("Error reading FLIP temporary file: %s."),
strerror (errno));
msg (SE, _("Unexpected end of file reading FLIP temporary file."));
else
NOT_REACHED ();
- ok = false;
- break;
+ flip->error = true;
+ return NULL;
}
-
- for (j = 0; j < flip->case_cnt; j++)
- case_data_rw (c, j)->f = input_buf[j].f;
- ok = write_case (wc_data);
+ case_data_rw_idx (c, i + 1)->f = in;
}
- free (input_buf);
- return ok;
+ flip->cases_read++;
+
+ return c;
}
-/* Destroy internal data in SOURCE. */
+/* Destroys the source.
+ Returns true if successful read, false if an I/O occurred
+ during destruction or previously. */
static void
-flip_source_destroy (struct case_source *source)
+flip_casereader_destroy (struct casereader *reader UNUSED, void *flip_)
{
- struct flip_pgm *flip = source->aux;
-
+ struct flip_pgm *flip = flip_;
+ if (flip->error)
+ casereader_force_error (reader);
destroy_flip_pgm (flip);
}
-static const struct case_source_class flip_source_class =
+static const struct casereader_class flip_casereader_class =
{
- "FLIP",
+ flip_casereader_read,
+ flip_casereader_destroy,
+ NULL,
NULL,
- flip_source_read,
- flip_source_destroy
};
+\f
+static void
+var_names_init (struct var_names *vn)
+{
+ vn->names = NULL;
+ vn->n_names = 0;
+ vn->allocated_names = 0;
+}
+
+static void
+var_names_add (struct pool *pool, struct var_names *vn, const char *name)
+{
+ if (vn->n_names >= vn->allocated_names)
+ vn->names = pool_2nrealloc (pool, vn->names, &vn->allocated_names,
+ sizeof *vn->names);
+ vn->names[vn->n_names++] = name;
+}
+
projects / pspp-builds.git / blobdiff