#include <config.h>
#include <ctype.h>
+#include <errno.h>
#include <float.h>
#include <stdlib.h>
#include "language/lexer/lexer.h"
#include "language/lexer/variable-parser.h"
#include "libpspp/array.h"
+#include "libpspp/hash-functions.h"
+#include "libpspp/i18n.h"
#include "libpspp/message.h"
#include "libpspp/misc.h"
+#include "libpspp/pool.h"
#include "libpspp/string-array.h"
#include "output/tab.h"
+#include "output/text-item.h"
+#include "gl/localcharset.h"
#include "gl/minmax.h"
#include "gl/xalloc.h"
static int describe_variable (const struct variable *v, struct tab_table *t,
int r, int pc, int flags);
+static void report_encodings (const struct file_handle *,
+ const struct sfm_reader *);
+
/* SYSFILE INFO utility. */
int
cmd_sysfile_info (struct lexer *lexer, struct dataset *ds UNUSED)
if (sfm_reader == NULL)
goto error;
+ if (encoding && !strcasecmp (encoding, "detect"))
+ {
+ report_encodings (h, sfm_reader);
+ fh_unref (h);
+ return CMD_SUCCESS;
+ }
+
reader = sfm_decode (sfm_reader, encoding, &d, &info);
if (!reader)
goto error;
: info.compression == SFM_COMP_SIMPLE ? "SAV"
: "ZSAV");
- tab_text (t, 0, r, TAB_LEFT, _("Charset:"));
+ tab_text (t, 0, r, TAB_LEFT, _("Encoding:"));
tab_text (t, 1, r++, TAB_LEFT, dict_get_encoding (d));
tab_submit (t);
free (vl);
}
+\f
+/* Encoding analysis. */
+
+static const char *encoding_names[] = {
+ /* These encodings are from http://encoding.spec.whatwg.org/, as retrieved
+ February 2014. Encodings not supported by glibc and encodings relevant
+ only to HTML have been removed. */
+ "utf-8",
+ "windows-1252",
+ "iso-8859-2",
+ "iso-8859-3",
+ "iso-8859-4",
+ "iso-8859-5",
+ "iso-8859-6",
+ "iso-8859-7",
+ "iso-8859-8",
+ "iso-8859-10",
+ "iso-8859-13",
+ "iso-8859-14",
+ "iso-8859-16",
+ "macintosh",
+ "windows-874",
+ "windows-1250",
+ "windows-1251",
+ "windows-1253",
+ "windows-1254",
+ "windows-1255",
+ "windows-1256",
+ "windows-1257",
+ "windows-1258",
+ "koi8-r",
+ "koi8-u",
+ "ibm866",
+ "gb18030",
+ "big5",
+ "euc-jp",
+ "iso-2022-jp",
+ "shift_jis",
+ "euc-kr",
+
+ /* Added by user request. */
+ "ibm850",
+ "din_66003",
+};
+#define N_ENCODING_NAMES (sizeof encoding_names / sizeof *encoding_names)
+
+struct encoding
+ {
+ uint64_t encodings;
+ char **utf8_strings;
+ unsigned int hash;
+ };
+
+static char **
+recode_strings (struct pool *pool,
+ char **strings, bool *ids, size_t n,
+ const char *encoding)
+{
+ char **utf8_strings;
+ size_t i;
+
+ utf8_strings = pool_alloc (pool, n * sizeof *utf8_strings);
+ for (i = 0; i < n; i++)
+ {
+ struct substring utf8;
+ int error;
+
+ error = recode_pedantically ("UTF-8", encoding, ss_cstr (strings[i]),
+ pool, &utf8);
+ if (!error)
+ {
+ ss_rtrim (&utf8, ss_cstr (" "));
+ utf8.string[utf8.length] = '\0';
+
+ if (ids[i] && !id_is_plausible (utf8.string, false))
+ error = EINVAL;
+ }
+
+ if (error)
+ return NULL;
+
+ utf8_strings[i] = utf8.string;
+ }
+
+ return utf8_strings;
+}
+
+static struct encoding *
+find_duplicate_encoding (struct encoding *encodings, size_t n_encodings,
+ char **utf8_strings, size_t n_strings,
+ unsigned int hash)
+{
+ struct encoding *e;
+
+ for (e = encodings; e < &encodings[n_encodings]; e++)
+ {
+ int i;
+
+ if (e->hash != hash)
+ goto next_encoding;
+
+ for (i = 0; i < n_strings; i++)
+ if (strcmp (utf8_strings[i], e->utf8_strings[i]))
+ goto next_encoding;
+
+ return e;
+ next_encoding:;
+ }
+
+ return NULL;
+}
+
+static bool
+all_equal (const struct encoding *encodings, size_t n_encodings,
+ size_t string_idx)
+{
+ const char *s0;
+ size_t i;
+
+ s0 = encodings[0].utf8_strings[string_idx];
+ for (i = 1; i < n_encodings; i++)
+ if (strcmp (s0, encodings[i].utf8_strings[string_idx]))
+ return false;
+
+ return true;
+}
+
+static int
+equal_prefix (const struct encoding *encodings, size_t n_encodings,
+ size_t string_idx)
+{
+ const char *s0;
+ size_t prefix;
+ size_t i;
+
+ s0 = encodings[0].utf8_strings[string_idx];
+ prefix = strlen (s0);
+ for (i = 1; i < n_encodings; i++)
+ {
+ const char *si = encodings[i].utf8_strings[string_idx];
+ size_t j;
+
+ for (j = 0; j < prefix; j++)
+ if (s0[j] != si[j])
+ {
+ prefix = j;
+ if (!prefix)
+ return 0;
+ break;
+ }
+ }
+
+ while (prefix > 0 && s0[prefix - 1] != ' ')
+ prefix--;
+ return prefix;
+}
+
+static int
+equal_suffix (const struct encoding *encodings, size_t n_encodings,
+ size_t string_idx)
+{
+ const char *s0;
+ size_t s0_len;
+ size_t suffix;
+ size_t i;
+
+ s0 = encodings[0].utf8_strings[string_idx];
+ s0_len = strlen (s0);
+ suffix = s0_len;
+ for (i = 1; i < n_encodings; i++)
+ {
+ const char *si = encodings[i].utf8_strings[string_idx];
+ size_t si_len = strlen (si);
+ size_t j;
+
+ if (si_len < suffix)
+ suffix = si_len;
+ for (j = 0; j < suffix; j++)
+ if (s0[s0_len - j - 1] != si[si_len - j - 1])
+ {
+ suffix = j;
+ if (!suffix)
+ return 0;
+ break;
+ }
+ }
+
+ while (suffix > 0 && s0[s0_len - suffix] != ' ')
+ suffix--;
+ return suffix;
+}
+
+static void
+report_encodings (const struct file_handle *h, const struct sfm_reader *r)
+{
+ char **titles;
+ char **strings;
+ bool *ids;
+ struct encoding encodings[N_ENCODING_NAMES];
+ size_t n_encodings, n_strings, n_unique_strings;
+ size_t i, j;
+ struct tab_table *t;
+ struct text_item *text;
+ struct pool *pool;
+ size_t row;
+
+ pool = pool_create ();
+ n_strings = sfm_get_strings (r, pool, &titles, &ids, &strings);
+
+ n_encodings = 0;
+ for (i = 0; i < N_ENCODING_NAMES; i++)
+ {
+ char **utf8_strings;
+ struct encoding *e;
+ unsigned int hash;
+
+ utf8_strings = recode_strings (pool, strings, ids, n_strings,
+ encoding_names[i]);
+ if (!utf8_strings)
+ continue;
+
+ /* Hash utf8_strings. */
+ hash = 0;
+ for (j = 0; j < n_strings; j++)
+ hash = hash_string (utf8_strings[j], hash);
+
+ /* If there's a duplicate encoding, just mark it. */
+ e = find_duplicate_encoding (encodings, n_encodings,
+ utf8_strings, n_strings, hash);
+ if (e)
+ {
+ e->encodings |= UINT64_C (1) << i;
+ continue;
+ }
+
+ e = &encodings[n_encodings++];
+ e->encodings = UINT64_C (1) << i;
+ e->utf8_strings = utf8_strings;
+ e->hash = hash;
+ }
+ if (!n_encodings)
+ {
+ msg (SW, _("No valid encodings found."));
+ pool_destroy (pool);
+ return;
+ }
+
+ text = text_item_create_format (
+ TEXT_ITEM_PARAGRAPH,
+ _("The following table lists the encodings that can successfully read %s, "
+ "by specifying the encoding name on the GET command's ENCODING "
+ "subcommand. Encodings that yield identical text are listed "
+ "together."), fh_get_name (h));
+ text_item_submit (text);
+
+ t = tab_create (2, n_encodings + 1);
+ tab_title (t, _("Usable encodings for %s."), fh_get_name (h));
+ tab_headers (t, 1, 0, 1, 0);
+ tab_box (t, TAL_1, TAL_1, -1, -1, 0, 0, 1, n_encodings);
+ tab_hline (t, TAL_1, 0, 1, 1);
+ tab_text (t, 0, 0, TAB_RIGHT, "#");
+ tab_text (t, 1, 0, TAB_LEFT, _("Encodings"));
+ for (i = 0; i < n_encodings; i++)
+ {
+ struct string s;
+
+ ds_init_empty (&s);
+ for (j = 0; j < 64; j++)
+ if (encodings[i].encodings & (UINT64_C (1) << j))
+ ds_put_format (&s, "%s, ", encoding_names[j]);
+ ds_chomp (&s, ss_cstr (", "));
+
+ tab_text_format (t, 0, i + 1, TAB_RIGHT, "%zu", i + 1);
+ tab_text (t, 1, i + 1, TAB_LEFT, ds_cstr (&s));
+ ds_destroy (&s);
+ }
+ tab_submit (t);
+
+ n_unique_strings = 0;
+ for (i = 0; i < n_strings; i++)
+ if (!all_equal (encodings, n_encodings, i))
+ n_unique_strings++;
+ if (!n_unique_strings)
+ {
+ pool_destroy (pool);
+ return;
+ }
+
+ text = text_item_create_format (
+ TEXT_ITEM_PARAGRAPH,
+ _("The following table lists text strings in the file dictionary that "
+ "the encodings above interpret differently, along with those "
+ "interpretations."));
+ text_item_submit (text);
+
+ t = tab_create (3, (n_encodings * n_unique_strings) + 1);
+ tab_title (t, _("%s encoded text strings."), fh_get_name (h));
+ tab_headers (t, 1, 0, 1, 0);
+ tab_box (t, TAL_1, TAL_1, -1, -1, 0, 0, 2, n_encodings * n_unique_strings);
+ tab_hline (t, TAL_1, 0, 2, 1);
+
+ tab_text (t, 0, 0, TAB_LEFT, _("Purpose"));
+ tab_text (t, 1, 0, TAB_RIGHT, "#");
+ tab_text (t, 2, 0, TAB_LEFT, _("Text"));
+
+ row = 1;
+ for (i = 0; i < n_strings; i++)
+ if (!all_equal (encodings, n_encodings, i))
+ {
+ int prefix = equal_prefix (encodings, n_encodings, i);
+ int suffix = equal_suffix (encodings, n_encodings, i);
+
+ tab_joint_text (t, 0, row, 0, row + n_encodings - 1,
+ TAB_LEFT, titles[i]);
+ tab_hline (t, TAL_1, 0, 2, row);
+ for (j = 0; j < n_encodings; j++)
+ {
+ const char *s = encodings[j].utf8_strings[i] + prefix;
+
+ tab_text_format (t, 1, row, TAB_RIGHT, "%zu", j + 1);
+ if (prefix || suffix)
+ {
+ size_t len = strlen (s) - suffix;
+ struct string entry;
+
+ ds_init_empty (&entry);
+ if (prefix)
+ ds_put_cstr (&entry, "...");
+ ds_put_substring (&entry, ss_buffer (s, len));
+ if (suffix)
+ ds_put_cstr (&entry, "...");
+ tab_text (t, 2, row, TAB_LEFT, ds_cstr (&entry));
+ }
+ else
+ tab_text (t, 2, row, TAB_LEFT, s);
+ row++;
+ }
+ }
+ tab_submit (t);
+
+ pool_destroy (pool);
+}
projects / pspp / blobdiff