/* Checking of messages in PO files.
Copyright (C) 1995-1998, 2000-2008, 2010-2015 Free Software
Foundation, Inc.
Written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, April 1995.
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/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
/* Specification. */
#include "msgl-check.h"
#include <limits.h>
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include "c-ctype.h"
#include "xalloc.h"
#include "xvasprintf.h"
#include "po-xerror.h"
#include "format.h"
#include "plural-exp.h"
#include "plural-eval.h"
#include "plural-table.h"
#include "c-strstr.h"
#include "message.h"
#include "quote.h"
#include "sentence.h"
#include "unictype.h"
#include "unistr.h"
#include "gettext.h"
#define _(str) gettext (str)
#define SIZEOF(a) (sizeof(a) / sizeof(a[0]))
/* Evaluates the plural formula for min <= n <= max
and returns the estimated number of times the value j was assumed. */
static unsigned int
plural_expression_histogram (const struct plural_distribution *self,
int min, int max, unsigned long j)
{
if (min < 0)
min = 0;
/* Limit the number of evaluations. Nothing interesting happens beyond
1000. */
if (max - min > 1000)
max = min + 1000;
if (min <= max)
{
const struct expression *expr = self->expr;
unsigned long n;
unsigned int count;
/* Protect against arithmetic exceptions. */
install_sigfpe_handler ();
count = 0;
for (n = min; n <= max; n++)
{
unsigned long val = plural_eval (expr, n);
if (val == j)
count++;
}
/* End of protection against arithmetic exceptions. */
uninstall_sigfpe_handler ();
return count;
}
else
return 0;
}
/* Check the values returned by plural_eval.
Signals the errors through po_xerror.
Return the number of errors that were seen.
If no errors, returns in *DISTRIBUTION information about the plural_eval
values distribution. */
int
check_plural_eval (const struct expression *plural_expr,
unsigned long nplurals_value,
const message_ty *header,
struct plural_distribution *distribution)
{
/* Do as if the plural formula assumes a value N infinitely often if it
assumes it at least 5 times. */
#define OFTEN 5
unsigned char * volatile array;
/* Allocate a distribution array. */
if (nplurals_value <= 100)
array = XCALLOC (nplurals_value, unsigned char);
else
/* nplurals_value is nonsense. Don't risk an out-of-memory. */
array = NULL;
if (sigsetjmp (sigfpe_exit, 1) == 0)
{
unsigned long n;
/* Protect against arithmetic exceptions. */
install_sigfpe_handler ();
for (n = 0; n <= 1000; n++)
{
unsigned long val = plural_eval (plural_expr, n);
if ((long) val < 0)
{
/* End of protection against arithmetic exceptions. */
uninstall_sigfpe_handler ();
po_xerror (PO_SEVERITY_ERROR, header, NULL, 0, 0, false,
_("plural expression can produce negative values"));
free (array);
return 1;
}
else if (val >= nplurals_value)
{
char *msg;
/* End of protection against arithmetic exceptions. */
uninstall_sigfpe_handler ();
msg = xasprintf (_("nplurals = %lu but plural expression can produce values as large as %lu"),
nplurals_value, val);
po_xerror (PO_SEVERITY_ERROR, header, NULL, 0, 0, false, msg);
free (msg);
free (array);
return 1;
}
if (array != NULL && array[val] < OFTEN)
array[val]++;
}
/* End of protection against arithmetic exceptions. */
uninstall_sigfpe_handler ();
/* Normalize the array[val] statistics. */
if (array != NULL)
{
unsigned long val;
for (val = 0; val < nplurals_value; val++)
array[val] = (array[val] == OFTEN ? 1 : 0);
}
distribution->expr = plural_expr;
distribution->often = array;
distribution->often_length = (array != NULL ? nplurals_value : 0);
distribution->histogram = plural_expression_histogram;
return 0;
}
else
{
/* Caught an arithmetic exception. */
const char *msg;
/* End of protection against arithmetic exceptions. */
uninstall_sigfpe_handler ();
#if USE_SIGINFO
switch (sigfpe_code)
#endif
{
#if USE_SIGINFO
# ifdef FPE_INTDIV
case FPE_INTDIV:
msg = _("plural expression can produce division by zero");
break;
# endif
# ifdef FPE_INTOVF
case FPE_INTOVF:
msg = _("plural expression can produce integer overflow");
break;
# endif
default:
#endif
msg = _("plural expression can produce arithmetic exceptions, possibly division by zero");
}
po_xerror (PO_SEVERITY_ERROR, header, NULL, 0, 0, false, msg);
free (array);
return 1;
}
#undef OFTEN
}
/* Try to help the translator by looking up the right plural formula for her.
Return a freshly allocated multiline help string, or NULL. */
static char *
plural_help (const char *nullentry)
{
struct plural_table_entry *ptentry = NULL;
{
const char *language;
language = c_strstr (nullentry, "Language: ");
if (language != NULL)
{
size_t len;
language += 10;
len = strcspn (language, " \t\n");
if (len > 0)
{
size_t j;
for (j = 0; j < plural_table_size; j++)
if (len == strlen (plural_table[j].lang)
&& strncmp (language, plural_table[j].lang, len) == 0)
{
ptentry = &plural_table[j];
break;
}
}
}
}
if (ptentry == NULL)
{
const char *language;
language = c_strstr (nullentry, "Language-Team: ");
if (language != NULL)
{
size_t j;
language += 15;
for (j = 0; j < plural_table_size; j++)
if (strncmp (language,
plural_table[j].language,
strlen (plural_table[j].language)) == 0)
{
ptentry = &plural_table[j];
break;
}
}
}
if (ptentry != NULL)
{
char *helpline1 =
xasprintf (_("Try using the following, valid for %s:"),
ptentry->language);
char *help =
xasprintf ("%s\n\"Plural-Forms: %s\\n\"\n",
helpline1, ptentry->value);
free (helpline1);
return help;
}
return NULL;
}
/* Perform plural expression checking.
Return the number of errors that were seen.
If no errors, returns in *DISTRIBUTION information about the plural_eval
values distribution. */
static int
check_plural (message_list_ty *mlp,
int ignore_untranslated_messages,
int ignore_fuzzy_messages,
struct plural_distribution *distributionp)
{
int seen_errors = 0;
const message_ty *has_plural;
unsigned long min_nplurals;
const message_ty *min_pos;
unsigned long max_nplurals;
const message_ty *max_pos;
struct plural_distribution distribution;
size_t j;
message_ty *header;
/* Determine whether mlp has plural entries. */
has_plural = NULL;
min_nplurals = ULONG_MAX;
min_pos = NULL;
max_nplurals = 0;
max_pos = NULL;
distribution.expr = NULL;
distribution.often = NULL;
distribution.often_length = 0;
distribution.histogram = NULL;
for (j = 0; j < mlp->nitems; j++)
{
message_ty *mp = mlp->item[j];
if (!mp->obsolete
&& !(ignore_untranslated_messages && mp->msgstr[0] == '\0')
&& !(ignore_fuzzy_messages && (mp->is_fuzzy && !is_header (mp)))
&& mp->msgid_plural != NULL)
{
const char *p;
const char *p_end;
unsigned long n;
if (has_plural == NULL)
has_plural = mp;
n = 0;
for (p = mp->msgstr, p_end = p + mp->msgstr_len;
p < p_end;
p += strlen (p) + 1)
n++;
if (min_nplurals > n)
{
min_nplurals = n;
min_pos = mp;
}
if (max_nplurals < n)
{
max_nplurals = n;
max_pos = mp;
}
}
}
/* Look at the plural entry for this domain.
Cf, function extract_plural_expression. */
header = message_list_search (mlp, NULL, "");
if (header != NULL && !header->obsolete)
{
const char *nullentry;
const char *plural;
const char *nplurals;
nullentry = header->msgstr;
plural = c_strstr (nullentry, "plural=");
nplurals = c_strstr (nullentry, "nplurals=");
if (plural == NULL && has_plural != NULL)
{
const char *msg1 =
_("message catalog has plural form translations");
const char *msg2 =
_("but header entry lacks a \"plural=EXPRESSION\" attribute");
char *help = plural_help (nullentry);
if (help != NULL)
{
char *msg2ext = xasprintf ("%s\n%s", msg2, help);
po_xerror2 (PO_SEVERITY_ERROR,
has_plural, NULL, 0, 0, false, msg1,
header, NULL, 0, 0, true, msg2ext);
free (msg2ext);
free (help);
}
else
po_xerror2 (PO_SEVERITY_ERROR,
has_plural, NULL, 0, 0, false, msg1,
header, NULL, 0, 0, false, msg2);
seen_errors++;
}
if (nplurals == NULL && has_plural != NULL)
{
const char *msg1 =
_("message catalog has plural form translations");
const char *msg2 =
_("but header entry lacks a \"nplurals=INTEGER\" attribute");
char *help = plural_help (nullentry);
if (help != NULL)
{
char *msg2ext = xasprintf ("%s\n%s", msg2, help);
po_xerror2 (PO_SEVERITY_ERROR,
has_plural, NULL, 0, 0, false, msg1,
header, NULL, 0, 0, true, msg2ext);
free (msg2ext);
free (help);
}
else
po_xerror2 (PO_SEVERITY_ERROR,
has_plural, NULL, 0, 0, false, msg1,
header, NULL, 0, 0, false, msg2);
seen_errors++;
}
if (plural != NULL && nplurals != NULL)
{
const char *endp;
unsigned long int nplurals_value;
struct parse_args args;
const struct expression *plural_expr;
/* First check the number. */
nplurals += 9;
while (*nplurals != '\0' && c_isspace ((unsigned char) *nplurals))
++nplurals;
endp = nplurals;
nplurals_value = 0;
if (*nplurals >= '0' && *nplurals <= '9')
nplurals_value = strtoul (nplurals, (char **) &endp, 10);
if (nplurals == endp)
{
const char *msg = _("invalid nplurals value");
char *help = plural_help (nullentry);
if (help != NULL)
{
char *msgext = xasprintf ("%s\n%s", msg, help);
po_xerror (PO_SEVERITY_ERROR, header, NULL, 0, 0, true,
msgext);
free (msgext);
free (help);
}
else
po_xerror (PO_SEVERITY_ERROR, header, NULL, 0, 0, false, msg);
seen_errors++;
}
/* Then check the expression. */
plural += 7;
args.cp = plural;
if (parse_plural_expression (&args) != 0)
{
const char *msg = _("invalid plural expression");
char *help = plural_help (nullentry);
if (help != NULL)
{
char *msgext = xasprintf ("%s\n%s", msg, help);
po_xerror (PO_SEVERITY_ERROR, header, NULL, 0, 0, true,
msgext);
free (msgext);
free (help);
}
else
po_xerror (PO_SEVERITY_ERROR, header, NULL, 0, 0, false, msg);
seen_errors++;
}
plural_expr = args.res;
/* See whether nplurals and plural fit together. */
if (!seen_errors)
seen_errors =
check_plural_eval (plural_expr, nplurals_value, header,
&distribution);
/* Check the number of plurals of the translations. */
if (!seen_errors)
{
if (min_nplurals < nplurals_value)
{
char *msg1 =
xasprintf (_("nplurals = %lu"), nplurals_value);
char *msg2 =
xasprintf (ngettext ("but some messages have only one plural form",
"but some messages have only %lu plural forms",
min_nplurals),
min_nplurals);
po_xerror2 (PO_SEVERITY_ERROR,
header, NULL, 0, 0, false, msg1,
min_pos, NULL, 0, 0, false, msg2);
free (msg2);
free (msg1);
seen_errors++;
}
else if (max_nplurals > nplurals_value)
{
char *msg1 =
xasprintf (_("nplurals = %lu"), nplurals_value);
char *msg2 =
xasprintf (ngettext ("but some messages have one plural form",
"but some messages have %lu plural forms",
max_nplurals),
max_nplurals);
po_xerror2 (PO_SEVERITY_ERROR,
header, NULL, 0, 0, false, msg1,
max_pos, NULL, 0, 0, false, msg2);
free (msg2);
free (msg1);
seen_errors++;
}
/* The only valid case is max_nplurals <= n <= min_nplurals,
which means either has_plural == NULL or
max_nplurals = n = min_nplurals. */
}
}
else
goto no_plural;
}
else
{
if (has_plural != NULL)
{
po_xerror (PO_SEVERITY_ERROR, has_plural, NULL, 0, 0, false,
_("message catalog has plural form translations, but lacks a header entry with \"Plural-Forms: nplurals=INTEGER; plural=EXPRESSION;\""));
seen_errors++;
}
no_plural:
/* By default, the Germanic formula (n != 1) is used. */
distribution.expr = &germanic_plural;
{
unsigned char *array = XCALLOC (2, unsigned char);
array[1] = 1;
distribution.often = array;
}
distribution.often_length = 2;
distribution.histogram = plural_expression_histogram;
}
/* distribution is not needed if we report errors.
Also, if there was an error due to max_nplurals > nplurals_value,
we must not use distribution because we would be doing out-of-bounds
array accesses. */
if (seen_errors > 0)
free ((unsigned char *) distribution.often);
else
*distributionp = distribution;
return seen_errors;
}
/* Signal an error when checking format strings. */
static const message_ty *curr_mp;
static lex_pos_ty curr_msgid_pos;
static void
formatstring_error_logger (const char *format, ...)
#if defined __GNUC__ && ((__GNUC__ == 2 && __GNUC_MINOR__ >= 7) || __GNUC__ > 2)
__attribute__ ((__format__ (__printf__, 1, 2)))
#endif
;
static void
formatstring_error_logger (const char *format, ...)
{
va_list args;
char *msg;
va_start (args, format);
if (vasprintf (&msg, format, args) < 0)
error (EXIT_FAILURE, 0, _("memory exhausted"));
va_end (args);
po_xerror (PO_SEVERITY_ERROR,
curr_mp, curr_msgid_pos.file_name, curr_msgid_pos.line_number,
(size_t)(-1), false, msg);
free (msg);
}
/* Perform miscellaneous checks on a message.
PLURAL_DISTRIBUTION is either NULL or an array of nplurals elements,
PLURAL_DISTRIBUTION[j] being true if the value j appears to be assumed
infinitely often by the plural formula.
PLURAL_DISTRIBUTION_LENGTH is the length of the PLURAL_DISTRIBUTION
array. */
static int
check_pair (const message_ty *mp,
const char *msgid,
const lex_pos_ty *msgid_pos,
const char *msgid_plural,
const char *msgstr, size_t msgstr_len,
const enum is_format is_format[NFORMATS],
int check_newlines,
int check_format_strings,
const struct plural_distribution *distribution,
int check_compatibility,
int check_accelerators, char accelerator_char)
{
int seen_errors;
int has_newline;
unsigned int j;
/* If the msgid string is empty we have the special entry reserved for
information about the translation. */
if (msgid[0] == '\0')
return 0;
seen_errors = 0;
if (check_newlines)
{
/* Test 1: check whether all or none of the strings begin with a '\n'. */
has_newline = (msgid[0] == '\n');
#define TEST_NEWLINE(p) (p[0] == '\n')
if (msgid_plural != NULL)
{
const char *p;
if (TEST_NEWLINE(msgid_plural) != has_newline)
{
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, _("\
'msgid' and 'msgid_plural' entries do not both begin with '\\n'"));
seen_errors++;
}
for (p = msgstr, j = 0; p < msgstr + msgstr_len; p += strlen (p) + 1, j++)
if (TEST_NEWLINE(p) != has_newline)
{
char *msg =
xasprintf (_("\
'msgid' and 'msgstr[%u]' entries do not both begin with '\\n'"), j);
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, msg);
free (msg);
seen_errors++;
}
}
else
{
if (TEST_NEWLINE(msgstr) != has_newline)
{
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, _("\
'msgid' and 'msgstr' entries do not both begin with '\\n'"));
seen_errors++;
}
}
#undef TEST_NEWLINE
/* Test 2: check whether all or none of the strings end with a '\n'. */
has_newline = (msgid[strlen (msgid) - 1] == '\n');
#define TEST_NEWLINE(p) (p[0] != '\0' && p[strlen (p) - 1] == '\n')
if (msgid_plural != NULL)
{
const char *p;
if (TEST_NEWLINE(msgid_plural) != has_newline)
{
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, _("\
'msgid' and 'msgid_plural' entries do not both end with '\\n'"));
seen_errors++;
}
for (p = msgstr, j = 0; p < msgstr + msgstr_len; p += strlen (p) + 1, j++)
if (TEST_NEWLINE(p) != has_newline)
{
char *msg =
xasprintf (_("\
'msgid' and 'msgstr[%u]' entries do not both end with '\\n'"), j);
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, msg);
free (msg);
seen_errors++;
}
}
else
{
if (TEST_NEWLINE(msgstr) != has_newline)
{
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, _("\
'msgid' and 'msgstr' entries do not both end with '\\n'"));
seen_errors++;
}
}
#undef TEST_NEWLINE
}
if (check_compatibility && msgid_plural != NULL)
{
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, _("\
plural handling is a GNU gettext extension"));
seen_errors++;
}
if (check_format_strings)
/* Test 3: Check whether both formats strings contain the same number
of format specifications. */
{
curr_mp = mp;
curr_msgid_pos = *msgid_pos;
seen_errors +=
check_msgid_msgstr_format (msgid, msgid_plural, msgstr, msgstr_len,
is_format, mp->range, distribution,
formatstring_error_logger);
}
if (check_accelerators && msgid_plural == NULL)
/* Test 4: Check that if msgid is a menu item with a keyboard accelerator,
the msgstr has an accelerator as well. A keyboard accelerator is
designated by an immediately preceding '&'. We cannot check whether
two accelerators collide, only whether the translator has bothered
thinking about them. */
{
const char *p;
/* We are only interested in msgids that contain exactly one '&'. */
p = strchr (msgid, accelerator_char);
if (p != NULL && strchr (p + 1, accelerator_char) == NULL)
{
/* Count the number of '&' in msgstr, but ignore '&&'. */
unsigned int count = 0;
for (p = msgstr; (p = strchr (p, accelerator_char)) != NULL; p++)
if (p[1] == accelerator_char)
p++;
else
count++;
if (count == 0)
{
char *msg =
xasprintf (_("msgstr lacks the keyboard accelerator mark '%c'"),
accelerator_char);
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, msg);
free (msg);
seen_errors++;
}
else if (count > 1)
{
char *msg =
xasprintf (_("msgstr has too many keyboard accelerator marks '%c'"),
accelerator_char);
po_xerror (PO_SEVERITY_ERROR,
mp, msgid_pos->file_name, msgid_pos->line_number,
(size_t)(-1), false, msg);
free (msg);
seen_errors++;
}
}
}
return seen_errors;
}
/* Perform miscellaneous checks on a header entry. */
static int
check_header_entry (const message_ty *mp, const char *msgstr_string)
{
static const char *required_fields[] =
{
"Project-Id-Version", "PO-Revision-Date", "Last-Translator",
"Language-Team", "MIME-Version", "Content-Type",
"Content-Transfer-Encoding",
/* These are recommended but not yet required. */
"Language"
};
static const char *default_values[] =
{
"PACKAGE VERSION", "YEAR-MO-DA HO:MI+ZONE", "FULL NAME <EMAIL@ADDRESS>", "LANGUAGE <LL@li.org>", NULL,
"text/plain; charset=CHARSET", "ENCODING",
""
};
const size_t nfields = SIZEOF (required_fields);
/* FIXME: We could check if a required header field is missing and
report it as error. However, it's could be too rigorous and
break backward compatibility. */
#if 0
const size_t nrequiredfields = nfields - 1;
#endif
int seen_errors = 0;
int cnt;
for (cnt = 0; cnt < nfields; ++cnt)
{
#if 0
int severity =
(cnt < nrequiredfields ? PO_SEVERITY_ERROR : PO_SEVERITY_WARNING);
#else
int severity =
PO_SEVERITY_WARNING;
#endif
const char *field = required_fields[cnt];
size_t len = strlen (field);
const char *line;
for (line = msgstr_string; *line != '\0'; )
{
if (strncmp (line, field, len) == 0 && line[len] == ':')
{
const char *p = line + len + 1;
/* Test whether the field's value, starting at p, is the default
value. */
if (*p == ' ')
p++;
if (default_values[cnt] != NULL
&& strncmp (p, default_values[cnt],
strlen (default_values[cnt])) == 0)
{
p += strlen (default_values[cnt]);
if (*p == '\0' || *p == '\n')
{
char *msg =
xasprintf (_("header field '%s' still has the initial default value\n"),
field);
po_xerror (severity, mp, NULL, 0, 0, true, msg);
free (msg);
if (severity == PO_SEVERITY_ERROR)
seen_errors++;
}
}
break;
}
line = strchrnul (line, '\n');
if (*line == '\n')
line++;
}
if (*line == '\0')
{
char *msg =
xasprintf (_("header field '%s' missing in header\n"),
field);
po_xerror (severity, mp, NULL, 0, 0, true, msg);
free (msg);
if (severity == PO_SEVERITY_ERROR)
seen_errors++;
}
}
return seen_errors;
}
/* Perform all checks on a non-obsolete message.
Return the number of errors that were seen. */
int
check_message (const message_ty *mp,
const lex_pos_ty *msgid_pos,
int check_newlines,
int check_format_strings,
const struct plural_distribution *distribution,
int check_header,
int check_compatibility,
int check_accelerators, char accelerator_char)
{
int seen_errors = 0;
if (check_header && is_header (mp))
seen_errors += check_header_entry (mp, mp->msgstr);
seen_errors += check_pair (mp,
mp->msgid, msgid_pos, mp->msgid_plural,
mp->msgstr, mp->msgstr_len,
mp->is_format,
check_newlines,
check_format_strings,
distribution,
check_compatibility,
check_accelerators, accelerator_char);
return seen_errors;
}
/* Perform all checks on a message list.
Return the number of errors that were seen. */
int
check_message_list (message_list_ty *mlp,
int ignore_untranslated_messages,
int ignore_fuzzy_messages,
int check_newlines,
int check_format_strings,
int check_header,
int check_compatibility,
int check_accelerators, char accelerator_char)
{
int seen_errors = 0;
struct plural_distribution distribution;
size_t j;
distribution.expr = NULL;
distribution.often = NULL;
distribution.often_length = 0;
distribution.histogram = NULL;
if (check_header)
seen_errors += check_plural (mlp, ignore_untranslated_messages,
ignore_fuzzy_messages, &distribution);
for (j = 0; j < mlp->nitems; j++)
{
message_ty *mp = mlp->item[j];
if (!mp->obsolete
&& !(ignore_untranslated_messages && mp->msgstr[0] == '\0')
&& !(ignore_fuzzy_messages && (mp->is_fuzzy && !is_header (mp))))
seen_errors += check_message (mp, &mp->pos,
check_newlines,
check_format_strings,
&distribution,
check_header, check_compatibility,
check_accelerators, accelerator_char);
}
return seen_errors;
}
static int
syntax_check_ellipsis_unicode (const message_ty *mp, const char *msgid)
{
const char *str = msgid;
const char *str_limit = str + strlen (msgid);
int seen_errors = 0;
while (str < str_limit)
{
const char *end, *cp;
ucs4_t ending_char;
end = sentence_end (str, &ending_char);
/* sentence_end doesn't treat '...' specially. */
cp = end - (ending_char == '.' ? 2 : 3);
if (cp >= str && memcmp (cp, "...", 3) == 0)
{
po_xerror (PO_SEVERITY_ERROR, mp, NULL, 0, 0, false,
_("ASCII ellipsis ('...') instead of Unicode"));
seen_errors++;
}
str = end + 1;
}
return seen_errors;
}
static int
syntax_check_space_ellipsis (const message_ty *mp, const char *msgid)
{
const char *str = msgid;
const char *str_limit = str + strlen (msgid);
int seen_errors = 0;
while (str < str_limit)
{
const char *end, *ellipsis = NULL;
ucs4_t ending_char;
end = sentence_end (str, &ending_char);
if (ending_char == 0x2026)
ellipsis = end;
else if (ending_char == '.')
{
/* sentence_end doesn't treat '...' specially. */
const char *cp = end - 2;
if (cp >= str && memcmp (cp, "...", 3) == 0)
ellipsis = cp;
}
else
{
/* Look for a '...'. */
const char *cp = end - 3;
if (cp >= str && memcmp (cp, "...", 3) == 0)
ellipsis = cp;
else
{
ucs4_t uc = 0xfffd;
/* Look for a U+2026. */
for (cp = end - 1; cp >= str; cp--)
{
u8_mbtouc (&uc, (const unsigned char *) cp, ellipsis - cp);
if (uc != 0xfffd)
break;
}
if (uc == 0x2026)
ellipsis = cp;
}
}
if (ellipsis)
{
const char *cp;
ucs4_t uc = 0xfffd;
/* Look at the character before ellipsis. */
for (cp = ellipsis - 1; cp >= str; cp--)
{
u8_mbtouc (&uc, (const unsigned char *) cp, ellipsis - cp);
if (uc != 0xfffd)
break;
}
if (uc != 0xfffd && uc_is_space (uc))
{
po_xerror (PO_SEVERITY_ERROR, mp, NULL, 0, 0, false,
_("\
space before ellipsis found in user visible strings"));
seen_errors++;
}
}
str = end + 1;
}
return seen_errors;
}
struct callback_arg
{
const message_ty *mp;
int seen_errors;
};
static void
syntax_check_quote_unicode_callback (char quote, const char *quoted,
size_t quoted_length, void *data)
{
struct callback_arg *arg = data;
switch (quote)
{
case '"':
po_xerror (PO_SEVERITY_ERROR, arg->mp, NULL, 0, 0, false,
_("ASCII double quote used instead of Unicode"));
arg->seen_errors++;
break;
case '\'':
po_xerror (PO_SEVERITY_ERROR, arg->mp, NULL, 0, 0, false,
_("ASCII single quote used instead of Unicode"));
arg->seen_errors++;
break;
default:
break;
}
}
static int
syntax_check_quote_unicode (const message_ty *mp, const char *msgid)
{
struct callback_arg arg;
arg.mp = mp;
arg.seen_errors = 0;
scan_quoted (msgid, strlen (msgid),
syntax_check_quote_unicode_callback, &arg);
return arg.seen_errors;
}
typedef int (* syntax_check_function) (const message_ty *mp, const char *msgid);
static const syntax_check_function sc_funcs[NSYNTAXCHECKS] =
{
syntax_check_ellipsis_unicode,
syntax_check_space_ellipsis,
syntax_check_quote_unicode
};
/* Perform all syntax checks on a non-obsolete message.
Return the number of errors that were seen. */
static int
syntax_check_message (const message_ty *mp)
{
int seen_errors = 0;
int i;
for (i = 0; i < NSYNTAXCHECKS; i++)
{
if (mp->do_syntax_check[i] == yes)
{
seen_errors += sc_funcs[i] (mp, mp->msgid);
if (mp->msgid_plural)
seen_errors += sc_funcs[i] (mp, mp->msgid_plural);
}
}
return seen_errors;
}
/* Perform all syntax checks on a message list.
Return the number of errors that were seen. */
int
syntax_check_message_list (message_list_ty *mlp)
{
int seen_errors = 0;
size_t j;
for (j = 0; j < mlp->nitems; j++)
{
message_ty *mp = mlp->item[j];
if (!is_header (mp))
seen_errors += syntax_check_message (mp);
}
return seen_errors;
}