/* PSPP - a program for statistical analysis.
- Copyright (C) 2007, 2009, 2010, 2011, 2012 Free Software Foundation, Inc.
+ Copyright (C) 2007, 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
#include "spreadsheet-reader.h"
+#include "c-xvasprintf.h"
+
#if !GNM_SUPPORT
struct casereader *
-gnumeric_open_reader (struct spreadsheet_read_info *gri, struct dictionary **dict)
+gnumeric_open_reader (struct spreadsheet_read_info *gri, struct spreadsheet_read_options *opts, struct dictionary **dict)
{
msg (ME, _("Support for %s files was not compiled into this installation of PSPP"), "Gnumeric");
enum reader_state
{
- STATE_INIT = 0, /* Initial state */
+ STATE_PRE_INIT = 0, /* Initial state */
+ STATE_SHEET_COUNT, /* Found the sheet index */
+ STATE_INIT , /* Other Initial state */
STATE_SHEET_START, /* Found the start of a sheet */
STATE_SHEET_NAME, /* Found the sheet name */
STATE_MAXROW,
+ STATE_MAXCOL,
STATE_SHEET_FOUND, /* Found the sheet that we actually want */
STATE_CELLS_START, /* Found the start of the cell array */
STATE_CELL /* Found a cell */
};
+struct sheet_detail
+{
+ xmlChar *name;
+
+ int start_col;
+ int stop_col;
+ int start_row;
+ int stop_row;
+
+ int maxcol;
+ int maxrow;
+};
+
struct gnumeric_reader
{
+ struct spreadsheet spreadsheet;
+
+ /* The libxml reader for this instance */
xmlTextReaderPtr xtr;
+ /* An internal state variable */
enum reader_state state;
+
int row;
int col;
+ int min_col;
int node_type;
int sheet_index;
+ int start_col;
+ int stop_col;
+ int start_row;
+ int stop_row;
+
+ struct sheet_detail *sheets;
const xmlChar *target_sheet;
int target_sheet_index;
- int start_row;
- int start_col;
- int stop_row;
- int stop_col;
-
struct caseproto *proto;
struct dictionary *dict;
struct ccase *first_case;
bool used_first_case;
};
+
+const char *
+gnumeric_get_sheet_name (struct spreadsheet *s, int n)
+{
+ struct gnumeric_reader *gr = (struct gnumeric_reader *) s;
+ assert (n < s->n_sheets);
+
+ return gr->sheets[n].name;
+}
+
+
static void process_node (struct gnumeric_reader *r);
+char *
+gnumeric_get_sheet_range (struct spreadsheet *s, int n)
+{
+ int ret;
+ struct gnumeric_reader *gr = (struct gnumeric_reader *) s;
+
+ assert (n < s->n_sheets);
+
+ while (
+ (gr->sheets[n].stop_col == -1)
+ &&
+ (1 == (ret = xmlTextReaderRead (gr->xtr)))
+ )
+ {
+ process_node (gr);
+ }
+
+
+ return create_cell_ref (
+ gr->sheets[n].start_col,
+ gr->sheets[n].start_row,
+ gr->sheets[n].stop_col,
+ gr->sheets[n].stop_row);
+}
+
+
static void
gnm_file_casereader_destroy (struct casereader *reader UNUSED, void *r_)
{
+ int i;
struct gnumeric_reader *r = r_;
if ( r == NULL)
return ;
caseproto_unref (r->proto);
+ for (i = 0; i < r->spreadsheet.n_sheets; ++i)
+ {
+ xmlFree (r->sheets[i].name);
+ }
+
+ free (r->sheets);
+
free (r);
}
switch ( r->state)
{
+ case STATE_PRE_INIT:
+ r->sheet_index = -1;
+ if (0 == xmlStrcasecmp (name, _xml("gnm:SheetNameIndex")) &&
+ XML_READER_TYPE_ELEMENT == r->node_type)
+ {
+ r->state = STATE_SHEET_COUNT;
+ r->spreadsheet.n_sheets = 0;
+ }
+ break;
+
+ case STATE_SHEET_COUNT:
+ if (0 == xmlStrcasecmp (name, _xml("gnm:SheetName")) &&
+ XML_READER_TYPE_ELEMENT == r->node_type)
+ {
+ struct sheet_detail *sd ;
+ r->spreadsheet.n_sheets++;
+ r->sheets = xrealloc (r->sheets, r->spreadsheet.n_sheets * sizeof *r->sheets);
+ sd = &r->sheets[r->spreadsheet.n_sheets - 1];
+ sd->start_col = sd->stop_col = sd->start_row = sd->stop_row = -1;
+ }
+ else if (0 == xmlStrcasecmp (name, _xml("gnm:SheetNameIndex")) &&
+ XML_READER_TYPE_END_ELEMENT == r->node_type)
+ {
+ r->state = STATE_INIT;
+ }
+ else if (XML_READER_TYPE_TEXT == r->node_type)
+ {
+ r->sheets [r->spreadsheet.n_sheets - 1].name = xmlTextReaderValue (r->xtr);
+ }
+ break;
+
case STATE_INIT:
if (0 == xmlStrcasecmp (name, _xml("gnm:Sheet")) &&
XML_READER_TYPE_ELEMENT == r->node_type)
{
+ ++r->sheet_index;
r->state = STATE_SHEET_START;
}
break;
{
r->state = STATE_SHEET_NAME;
}
- else if (0 == xmlStrcasecmp (name, _xml("gnm:Name")) &&
- XML_READER_TYPE_END_ELEMENT == r->node_type)
- {
- r->state = STATE_INIT;
- }
break;
case STATE_SHEET_NAME:
if (0 == xmlStrcasecmp (name, _xml("gnm:Name")) &&
XML_READER_TYPE_END_ELEMENT == r->node_type)
{
- r->state = STATE_SHEET_START;
+ r->state = STATE_INIT;
+ }
+ else if (0 == xmlStrcasecmp (name, _xml("gnm:Sheet")) &&
+ XML_READER_TYPE_END_ELEMENT == r->node_type)
+ {
+ r->state = STATE_INIT;
}
else if (XML_READER_TYPE_TEXT == r->node_type)
{
- ++r->sheet_index;
- if ( r->target_sheet != NULL)
+ if ( r->target_sheet != NULL)
{
xmlChar *value = xmlTextReaderValue (r->xtr);
if ( 0 == xmlStrcmp (value, r->target_sheet))
r->state = STATE_SHEET_FOUND;
free (value);
}
- else if (r->target_sheet_index == r->sheet_index)
+ else if (r->target_sheet_index == r->sheet_index + 1)
+ {
+ r->state = STATE_SHEET_FOUND;
+ }
+ else if (r->target_sheet_index == -1)
{
r->state = STATE_SHEET_FOUND;
}
if (0 == xmlStrcasecmp (name, _xml("gnm:Cells")) &&
XML_READER_TYPE_ELEMENT == r->node_type)
{
+ r->min_col = INT_MAX;
if (! xmlTextReaderIsEmptyElement (r->xtr))
r->state = STATE_CELLS_START;
}
{
r->state = STATE_MAXROW;
}
+ else if (0 == xmlStrcasecmp (name, _xml("gnm:MaxCol")) &&
+ XML_READER_TYPE_ELEMENT == r->node_type)
+ {
+ r->state = STATE_MAXCOL;
+ }
else if (0 == xmlStrcasecmp (name, _xml("gnm:Sheet")) &&
XML_READER_TYPE_END_ELEMENT == r->node_type)
{
- r->state = STATE_INIT;
+ r->state = STATE_INIT;
}
break;
case STATE_MAXROW:
{
r->state = STATE_SHEET_FOUND;
}
+ else if (r->node_type == XML_READER_TYPE_TEXT)
+ {
+ xmlChar *value = xmlTextReaderValue (r->xtr);
+ r->sheets[r->sheet_index].maxrow = _xmlchar_to_int (value);
+ xmlFree (value);
+ }
+ break;
+ case STATE_MAXCOL:
+ if (0 == xmlStrcasecmp (name, _xml("gnm:MaxCol")) &&
+ XML_READER_TYPE_END_ELEMENT == r->node_type)
+ {
+ r->state = STATE_SHEET_FOUND;
+ }
+ else if (r->node_type == XML_READER_TYPE_TEXT)
+ {
+ xmlChar *value = xmlTextReaderValue (r->xtr);
+ r->sheets[r->sheet_index].maxcol = _xmlchar_to_int (value);
+ xmlFree (value);
+ }
+ break;
case STATE_CELLS_START:
if (0 == xmlStrcasecmp (name, _xml ("gnm:Cell")) &&
XML_READER_TYPE_ELEMENT == r->node_type)
r->col = _xmlchar_to_int (attr);
free (attr);
+ if (r->col < r->min_col)
+ r->min_col = r->col;
+
attr = xmlTextReaderGetAttribute (r->xtr, _xml ("Row"));
r->row = _xmlchar_to_int (attr);
free (attr);
+ if (r->sheets[r->sheet_index].start_row == -1)
+ {
+ r->sheets[r->sheet_index].start_row = r->row;
+ }
+
+ if (r->sheets[r->sheet_index].start_col == -1)
+ {
+ r->sheets[r->sheet_index].start_col = r->col;
+ }
}
else if (0 == xmlStrcasecmp (name, _xml("gnm:Cells")) &&
XML_READER_TYPE_END_ELEMENT == r->node_type)
- r->state = STATE_SHEET_NAME;
-
+ {
+ r->sheets[r->sheet_index].stop_col = r->col;
+ r->sheets[r->sheet_index].stop_row = r->row;
+ r->state = STATE_SHEET_NAME;
+ }
break;
case STATE_CELL:
if (0 == xmlStrcasecmp (name, _xml("gnm:Cell")) &&
XML_READER_TYPE_END_ELEMENT == r->node_type)
- r->state = STATE_CELLS_START;
+ {
+ r->state = STATE_CELLS_START;
+ }
break;
default:
break;
xmlChar *first_value;
};
-struct casereader *
-gnumeric_open_reader (struct spreadsheet_read_info *gri, struct dictionary **dict)
+
+void
+gnumeric_destroy (struct spreadsheet *s)
{
- unsigned long int vstart = 0;
+ struct gnumeric_reader *r = (struct gnumeric *) s;
+ gnm_file_casereader_destroy (NULL, s);
+}
+
+
+static struct gnumeric_reader *
+gnumeric_reopen (struct gnumeric_reader *r, const char *filename)
+{
int ret;
- casenumber n_cases = CASENUMBER_MAX;
- int i;
- struct var_spec *var_spec = NULL;
- int n_var_specs = 0;
- struct gnumeric_reader *r = NULL;
+ xmlTextReaderPtr xtr;
+ gzFile gz;
- gzFile gz = gzopen (gri->file_name, "r");
+ assert (r == NULL || filename == NULL);
- if ( NULL == gz)
- {
- msg (ME, _("Error opening `%s' for reading as a Gnumeric file: %s."),
- gri->file_name, strerror (errno));
+ if (r && r->xtr)
+ xmlFreeTextReader (r->xtr);
- goto error;
- }
+ if (filename)
+ gz = gzopen (filename, "r");
+ else
+ gz = gzopen ( r->spreadsheet.file_name, "r");
- r = xzalloc (sizeof *r);
+ if (NULL == gz)
+ return NULL;
- r->xtr = xmlReaderForIO ((xmlInputReadCallback) gzread,
+ xtr = xmlReaderForIO ((xmlInputReadCallback) gzread,
(xmlInputCloseCallback) gzclose, gz,
NULL, NULL, 0);
- if ( r->xtr == NULL)
- goto error;
+ if (xtr == NULL)
+ {
+ gzclose (gz);
+ return NULL;
+ }
+
+ if (r == NULL)
+ {
+ r = xzalloc (sizeof *r);
+ r->spreadsheet.n_sheets = -1;
+ r->spreadsheet.file_name = filename;
+ }
+
+ r->target_sheet = NULL;
+ r->target_sheet_index = -1;
- if ( gri->cell_range )
+ r->row = r->col = -1;
+ r->state = STATE_PRE_INIT;
+ r->xtr = xtr;
+
+ /* Advance to the start of the workbook.
+ This gives us some confidence that we are actually dealing with a gnumeric
+ spreadsheet.
+ */
+ while ( (r->state != STATE_INIT )
+ && 1 == (ret = xmlTextReaderRead (r->xtr)))
{
- if ( ! convert_cell_ref (gri->cell_range,
+ process_node (r);
+ }
+
+ r->spreadsheet.type = SPREADSHEET_GNUMERIC;
+
+ return r;
+}
+
+
+struct spreadsheet *
+gnumeric_probe (const char *filename)
+{
+ struct gnumeric_reader *r = gnumeric_reopen (NULL, filename);
+
+ return &r->spreadsheet;
+}
+
+
+struct casereader *
+gnumeric_make_reader (struct spreadsheet *spreadsheet,
+ const struct spreadsheet_read_info *gri,
+ struct spreadsheet_read_options *opts)
+{
+ struct gnumeric_reader *r = NULL;
+ unsigned long int vstart = 0;
+ int ret;
+ casenumber n_cases = CASENUMBER_MAX;
+ int i;
+ struct var_spec *var_spec = NULL;
+ int n_var_specs = 0;
+
+ r = (struct gnumeric_reader *) (spreadsheet);
+
+ if (r->row != -1)
+ r = gnumeric_reopen (r, NULL);
+
+ if ( opts->cell_range )
+ {
+ if ( ! convert_cell_ref (opts->cell_range,
&r->start_col, &r->start_row,
&r->stop_col, &r->stop_row))
{
msg (SE, _("Invalid cell range `%s'"),
- gri->cell_range);
+ opts->cell_range);
goto error;
}
}
else
{
- r->start_col = 0;
+ r->start_col = -1;
r->start_row = 0;
r->stop_col = -1;
r->stop_row = -1;
}
- r->state = STATE_INIT;
- r->target_sheet = BAD_CAST gri->sheet_name;
- r->target_sheet_index = gri->sheet_index;
+ r->target_sheet = BAD_CAST opts->sheet_name;
+ r->target_sheet_index = opts->sheet_index;
r->row = r->col = -1;
- r->sheet_index = 0;
+ r->sheet_index = -1;
/* Advance to the start of the cells for the target sheet */
while ( (r->state != STATE_CELL || r->row < r->start_row )
free (value);
}
-
/* If a range has been given, then use that to calculate the number
of cases */
- if ( gri->cell_range)
+ if ( opts->cell_range)
{
n_cases = MIN (n_cases, r->stop_row - r->start_row + 1);
}
if ( idx >= n_var_specs )
{
+ int i;
+ var_spec = xrealloc (var_spec, sizeof (*var_spec) * (idx + 1));
+ for (i = n_var_specs; i <= idx; ++i)
+ {
+ var_spec [i].name = NULL;
+ var_spec [i].width = -1;
+ var_spec [i].first_value = NULL;
+ }
n_var_specs = idx + 1 ;
- var_spec = xrealloc (var_spec, sizeof (*var_spec) * n_var_specs);
- var_spec [idx].name = NULL;
- var_spec [idx].width = -1;
- var_spec [idx].first_value = NULL;
}
if ( r->node_type == XML_READER_TYPE_TEXT )
}
}
-
- /* Create the dictionary and populate it */
- *dict = r->dict = dict_create (
- CHAR_CAST (const char *, xmlTextReaderConstEncoding (r->xtr)));
+ {
+ const xmlChar *enc = xmlTextReaderConstEncoding (r->xtr);
+ if ( enc == NULL)
+ goto error;
+ /* Create the dictionary and populate it */
+ spreadsheet->dict = r->dict = dict_create (CHAR_CAST (const char *, enc));
+ }
for (i = 0 ; i < n_var_specs ; ++i )
{
char *name;
+ if ( (var_spec[i].name == NULL) && (var_spec[i].first_value == NULL))
+ continue;
+
/* Probably no data exists for this variable, so allocate a
default width */
if ( var_spec[i].width == -1 )
if ( n_var_specs == 0 )
{
msg (MW, _("Selected sheet or range of spreadsheet `%s' is empty."),
- gri->file_name);
+ spreadsheet->file_name);
goto error;
}
r->first_case = case_create (r->proto);
case_set_missing (r->first_case);
+ int x = 0;
for ( i = 0 ; i < n_var_specs ; ++i )
{
- const struct variable *var = dict_get_var (r->dict, i);
+ if ( (var_spec[i].name == NULL) && (var_spec[i].first_value == NULL))
+ continue;
+
+ const struct variable *var = dict_get_var (r->dict, x++);
convert_xml_string_to_value (r->first_case, var,
var_spec[i].first_value);
}
free (var_spec);
-
+
+
+ if (opts->cell_range == NULL)
+ {
+ opts->cell_range = c_xasprintf ("%c%d:%c%ld",
+ r->start_col + 'A',
+ r->start_row,
+ r->stop_col + 'A' + caseproto_get_n_widths (r->proto),
+ r->start_row + n_cases);
+ }
+
return casereader_create_sequential
(NULL,
r->proto,
}
free (var_spec);
- dict_destroy (*dict);
+ dict_destroy (spreadsheet->dict);
+ spreadsheet->dict = NULL;
gnm_file_casereader_destroy (NULL, r);
c = case_create (r->proto);
case_set_missing (c);
+ if (r->start_col == -1)
+ r->start_col = r->min_col;
+
while ((r->state == STATE_CELL || r->state == STATE_CELLS_START )
&& r->row == current_row && (ret = xmlTextReaderRead (r->xtr)))
{
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