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gettext/source/gettext-tools/src/format-boost.c
Anatol Belski 1649dd1da7 updated to gettext 0.18.3
2014-02-13 05:17:49 -08:00

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/* Boost format strings.
Copyright (C) 2001-2004, 2006-2007, 2009 Free Software Foundation, Inc.
Written by Bruno Haible <haible@clisp.cons.org>, 2006.
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
#include <stdbool.h>
#include <stdlib.h>
#include "format.h"
#include "c-ctype.h"
#include "xalloc.h"
#include "xvasprintf.h"
#include "format-invalid.h"
#include "gettext.h"
#define _(str) gettext (str)
/* Boost format strings are described in
boost_1_33_1/libs/format/doc/format.html
and implemented in
boost_1_33_1/boost/format/parsing.hpp.
A directive (other than '%%')
- starts with '%' or '%|'; in the latter case it must end in '|',
- is continued either by
- 'm%' where m is a positive integer, starting with a nonzero digit;
in this case the directive must not have started with '%|'; or
- the following:
- optional: 'm$' where m is a positive integer, starting with a
nonzero digit,
- optional: any of the characters '#', '0', '-', ' ', '+', "'",
'_', '=', 'h', 'l',
- optional: a width specification: '*' (reads an argument) or '*m$'
or a nonempty digit sequence,
- optional: a '.' and a precision specification: '*' (reads an
argument) or '*m$' or a nonempty digit sequence,
- optional: any of the characters 'h', 'l', 'L',
- if the directive started with '%|':
an optional specifier and a final '|',
otherwise
a mandatory specifier.
If no specifier is given, it needs an argument of any type.
The possible specifiers are:
- 'c', 'C', that need a character argument,
- 's', 'S', that need an argument of any type,
- 'i', 'd', 'o', 'u', 'x', 'X', that need an integer argument,
- 'e', 'E', 'f', 'g', 'G', that need a floating-point argument,
- 'p', that needs a 'void *' argument,
- 't', that doesn't need an argument,
- 'TX', where X is any character, that doesn't need an argument,
- 'n', that needs a pointer to integer.
The Boost format string interpreter doesn't actually care about
the argument types, but we do, because it increases the likelihood
of detecting translator mistakes.
Numbered ('%m%' or '%m$' or '*m$') and unnumbered argument specifications
cannot be used in the same string.
*/
enum format_arg_type
{
FAT_NONE = 0,
/* Basic types */
FAT_INTEGER = 1,
FAT_DOUBLE = 2,
FAT_CHAR = 3,
FAT_POINTER = 4,
FAT_ANY = 5
};
struct numbered_arg
{
unsigned int number;
enum format_arg_type type;
};
struct spec
{
unsigned int directives;
unsigned int numbered_arg_count;
unsigned int allocated;
struct numbered_arg *numbered;
};
/* Locale independent test for a decimal digit.
Argument can be 'char' or 'unsigned char'. (Whereas the argument of
<ctype.h> isdigit must be an 'unsigned char'.) */
#undef isdigit
#define isdigit(c) ((unsigned int) ((c) - '0') < 10)
static int
numbered_arg_compare (const void *p1, const void *p2)
{
unsigned int n1 = ((const struct numbered_arg *) p1)->number;
unsigned int n2 = ((const struct numbered_arg *) p2)->number;
return (n1 > n2 ? 1 : n1 < n2 ? -1 : 0);
}
static void *
format_parse (const char *format, bool translated, char *fdi,
char **invalid_reason)
{
const char *const format_start = format;
struct spec spec;
unsigned int unnumbered_arg_count;
struct spec *result;
spec.directives = 0;
spec.numbered_arg_count = 0;
spec.allocated = 0;
spec.numbered = NULL;
unnumbered_arg_count = 0;
for (; *format != '\0';)
if (*format++ == '%')
{
/* A directive. */
FDI_SET (format - 1, FMTDIR_START);
spec.directives++;
if (*format == '%')
format++;
else
{
bool brackets = false;
bool done = false;
unsigned int number = 0;
enum format_arg_type type = FAT_NONE;
if (*format == '|')
{
format++;
brackets = true;
}
if (isdigit (*format) && *format != '0')
{
const char *f = format;
unsigned int m = 0;
do
{
m = 10 * m + (*f - '0');
f++;
}
while (isdigit (*f));
if ((!brackets && *f == '%') || *f == '$')
{
if (m == 0) /* can happen if m overflows */
{
*invalid_reason = INVALID_ARGNO_0 (spec.directives);
FDI_SET (f, FMTDIR_ERROR);
goto bad_format;
}
number = m;
if (*f == '%')
{
type = FAT_ANY;
done = true;
}
format = ++f;
}
}
if (!done)
{
/* Parse flags. */
for (;;)
{
if (*format == ' ' || *format == '+' || *format == '-'
|| *format == '#' || *format == '0' || *format == '\''
|| *format == '_' || *format == '=' || *format == 'h'
|| *format == 'l')
format++;
else
break;
}
/* Parse width. */
if (*format == '*')
{
unsigned int width_number = 0;
format++;
if (isdigit (*format))
{
const char *f = format;
unsigned int m = 0;
do
{
m = 10 * m + (*f - '0');
f++;
}
while (isdigit (*f));
if (*f == '$')
{
if (m == 0)
{
*invalid_reason =
INVALID_WIDTH_ARGNO_0 (spec.directives);
FDI_SET (f, FMTDIR_ERROR);
goto bad_format;
}
width_number = m;
format = ++f;
}
}
if (width_number)
{
/* Numbered argument. */
/* Numbered and unnumbered specifications are
exclusive. */
if (unnumbered_arg_count > 0)
{
*invalid_reason =
INVALID_MIXES_NUMBERED_UNNUMBERED ();
FDI_SET (format - 1, FMTDIR_ERROR);
goto bad_format;
}
if (spec.allocated == spec.numbered_arg_count)
{
spec.allocated = 2 * spec.allocated + 1;
spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
}
spec.numbered[spec.numbered_arg_count].number = width_number;
spec.numbered[spec.numbered_arg_count].type = FAT_INTEGER;
spec.numbered_arg_count++;
}
else
{
/* Unnumbered argument. */
/* Numbered and unnumbered specifications are
exclusive. */
if (spec.numbered_arg_count > 0)
{
*invalid_reason =
INVALID_MIXES_NUMBERED_UNNUMBERED ();
FDI_SET (format - 1, FMTDIR_ERROR);
goto bad_format;
}
if (spec.allocated == unnumbered_arg_count)
{
spec.allocated = 2 * spec.allocated + 1;
spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
}
spec.numbered[unnumbered_arg_count].number = unnumbered_arg_count + 1;
spec.numbered[unnumbered_arg_count].type = FAT_INTEGER;
unnumbered_arg_count++;
}
}
else if (isdigit (*format))
{
do format++; while (isdigit (*format));
}
/* Parse precision. */
if (*format == '.')
{
format++;
if (*format == '*')
{
unsigned int precision_number = 0;
format++;
if (isdigit (*format))
{
const char *f = format;
unsigned int m = 0;
do
{
m = 10 * m + (*f - '0');
f++;
}
while (isdigit (*f));
if (*f == '$')
{
if (m == 0)
{
*invalid_reason =
INVALID_PRECISION_ARGNO_0 (spec.directives);
FDI_SET (f, FMTDIR_ERROR);
goto bad_format;
}
precision_number = m;
format = ++f;
}
}
if (precision_number)
{
/* Numbered argument. */
/* Numbered and unnumbered specifications are
exclusive. */
if (unnumbered_arg_count > 0)
{
*invalid_reason =
INVALID_MIXES_NUMBERED_UNNUMBERED ();
FDI_SET (format - 1, FMTDIR_ERROR);
goto bad_format;
}
if (spec.allocated == spec.numbered_arg_count)
{
spec.allocated = 2 * spec.allocated + 1;
spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
}
spec.numbered[spec.numbered_arg_count].number = precision_number;
spec.numbered[spec.numbered_arg_count].type = FAT_INTEGER;
spec.numbered_arg_count++;
}
else
{
/* Unnumbered argument. */
/* Numbered and unnumbered specifications are
exclusive. */
if (spec.numbered_arg_count > 0)
{
*invalid_reason =
INVALID_MIXES_NUMBERED_UNNUMBERED ();
FDI_SET (format - 1, FMTDIR_ERROR);
goto bad_format;
}
if (spec.allocated == unnumbered_arg_count)
{
spec.allocated = 2 * spec.allocated + 1;
spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
}
spec.numbered[unnumbered_arg_count].number = unnumbered_arg_count + 1;
spec.numbered[unnumbered_arg_count].type = FAT_INTEGER;
unnumbered_arg_count++;
}
}
else if (isdigit (*format))
{
do format++; while (isdigit (*format));
}
}
/* Parse size. */
for (;;)
{
if (*format == 'h' || *format == 'l' || *format == 'L')
format++;
else
break;
}
switch (*format++)
{
case 'c': case 'C':
type = FAT_CHAR;
break;
case 's': case 'S':
type = FAT_ANY;
break;
case 'i': case 'd': case 'o': case 'u': case 'x': case 'X':
type = FAT_INTEGER;
break;
case 'e': case 'E': case 'f': case 'g': case 'G':
type = FAT_DOUBLE;
break;
case 'p':
type = FAT_POINTER;
break;
case 't':
type = FAT_NONE;
break;
case 'T':
if (*format == '\0')
{
*invalid_reason = INVALID_UNTERMINATED_DIRECTIVE ();
FDI_SET (format - 1, FMTDIR_ERROR);
goto bad_format;
}
format++;
type = FAT_NONE;
break;
case 'n':
type = FAT_NONE;
break;
case '|':
if (brackets)
{
--format;
type = FAT_ANY;
break;
}
/*FALLTHROUGH*/
default:
--format;
if (*format == '\0')
{
*invalid_reason = INVALID_UNTERMINATED_DIRECTIVE ();
FDI_SET (format - 1, FMTDIR_ERROR);
}
else
{
*invalid_reason =
INVALID_CONVERSION_SPECIFIER (spec.directives,
*format);
FDI_SET (format, FMTDIR_ERROR);
}
goto bad_format;
}
if (brackets)
{
if (*format != '|')
{
if (*format == '\0')
{
*invalid_reason = INVALID_UNTERMINATED_DIRECTIVE ();
FDI_SET (format - 1, FMTDIR_ERROR);
}
else
{
*invalid_reason =
xasprintf (_("The directive number %u starts with | but does not end with |."),
spec.directives);
FDI_SET (format, FMTDIR_ERROR);
}
goto bad_format;
}
format++;
}
}
if (type != FAT_NONE)
{
if (number)
{
/* Numbered argument. */
/* Numbered and unnumbered specifications are exclusive. */
if (unnumbered_arg_count > 0)
{
*invalid_reason = INVALID_MIXES_NUMBERED_UNNUMBERED ();
FDI_SET (format - 1, FMTDIR_ERROR);
goto bad_format;
}
if (spec.allocated == spec.numbered_arg_count)
{
spec.allocated = 2 * spec.allocated + 1;
spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
}
spec.numbered[spec.numbered_arg_count].number = number;
spec.numbered[spec.numbered_arg_count].type = type;
spec.numbered_arg_count++;
}
else
{
/* Unnumbered argument. */
/* Numbered and unnumbered specifications are exclusive. */
if (spec.numbered_arg_count > 0)
{
*invalid_reason = INVALID_MIXES_NUMBERED_UNNUMBERED ();
FDI_SET (format - 1, FMTDIR_ERROR);
goto bad_format;
}
if (spec.allocated == unnumbered_arg_count)
{
spec.allocated = 2 * spec.allocated + 1;
spec.numbered = (struct numbered_arg *) xrealloc (spec.numbered, spec.allocated * sizeof (struct numbered_arg));
}
spec.numbered[unnumbered_arg_count].number = unnumbered_arg_count + 1;
spec.numbered[unnumbered_arg_count].type = type;
unnumbered_arg_count++;
}
}
}
FDI_SET (format - 1, FMTDIR_END);
}
/* Convert the unnumbered argument array to numbered arguments. */
if (unnumbered_arg_count > 0)
spec.numbered_arg_count = unnumbered_arg_count;
/* Sort the numbered argument array, and eliminate duplicates. */
else if (spec.numbered_arg_count > 1)
{
unsigned int i, j;
bool err;
qsort (spec.numbered, spec.numbered_arg_count,
sizeof (struct numbered_arg), numbered_arg_compare);
/* Remove duplicates: Copy from i to j, keeping 0 <= j <= i. */
err = false;
for (i = j = 0; i < spec.numbered_arg_count; i++)
if (j > 0 && spec.numbered[i].number == spec.numbered[j-1].number)
{
enum format_arg_type type1 = spec.numbered[i].type;
enum format_arg_type type2 = spec.numbered[j-1].type;
enum format_arg_type type_both;
if (type1 == type2 || type2 == FAT_ANY)
type_both = type1;
else if (type1 == FAT_ANY)
type_both = type2;
else
{
/* Incompatible types. */
type_both = FAT_NONE;
if (!err)
*invalid_reason =
INVALID_INCOMPATIBLE_ARG_TYPES (spec.numbered[i].number);
err = true;
}
spec.numbered[j-1].type = type_both;
}
else
{
if (j < i)
{
spec.numbered[j].number = spec.numbered[i].number;
spec.numbered[j].type = spec.numbered[i].type;
}
j++;
}
spec.numbered_arg_count = j;
if (err)
/* *invalid_reason has already been set above. */
goto bad_format;
}
result = XMALLOC (struct spec);
*result = spec;
return result;
bad_format:
if (spec.numbered != NULL)
free (spec.numbered);
return NULL;
}
static void
format_free (void *descr)
{
struct spec *spec = (struct spec *) descr;
if (spec->numbered != NULL)
free (spec->numbered);
free (spec);
}
static int
format_get_number_of_directives (void *descr)
{
struct spec *spec = (struct spec *) descr;
return spec->directives;
}
static bool
format_check (void *msgid_descr, void *msgstr_descr, bool equality,
formatstring_error_logger_t error_logger,
const char *pretty_msgid, const char *pretty_msgstr)
{
struct spec *spec1 = (struct spec *) msgid_descr;
struct spec *spec2 = (struct spec *) msgstr_descr;
bool err = false;
if (spec1->numbered_arg_count + spec2->numbered_arg_count > 0)
{
unsigned int i, j;
unsigned int n1 = spec1->numbered_arg_count;
unsigned int n2 = spec2->numbered_arg_count;
/* Check the argument names are the same.
Both arrays are sorted. We search for the first difference. */
for (i = 0, j = 0; i < n1 || j < n2; )
{
int cmp = (i >= n1 ? 1 :
j >= n2 ? -1 :
spec1->numbered[i].number > spec2->numbered[j].number ? 1 :
spec1->numbered[i].number < spec2->numbered[j].number ? -1 :
0);
if (cmp > 0)
{
if (error_logger)
error_logger (_("a format specification for argument %u, as in '%s', doesn't exist in '%s'"),
spec2->numbered[j].number, pretty_msgstr,
pretty_msgid);
err = true;
break;
}
else if (cmp < 0)
{
if (equality)
{
if (error_logger)
error_logger (_("a format specification for argument %u doesn't exist in '%s'"),
spec1->numbered[i].number, pretty_msgstr);
err = true;
break;
}
else
i++;
}
else
j++, i++;
}
/* Check the argument types are the same. */
if (!err)
for (i = 0, j = 0; j < n2; )
{
if (spec1->numbered[i].number == spec2->numbered[j].number)
{
if (spec1->numbered[i].type != spec2->numbered[j].type)
{
if (error_logger)
error_logger (_("format specifications in '%s' and '%s' for argument %u are not the same"),
pretty_msgid, pretty_msgstr,
spec2->numbered[j].number);
err = true;
break;
}
j++, i++;
}
else
i++;
}
}
return err;
}
struct formatstring_parser formatstring_boost =
{
format_parse,
format_free,
format_get_number_of_directives,
NULL,
format_check
};
#ifdef TEST
/* Test program: Print the argument list specification returned by
format_parse for strings read from standard input. */
#include <stdio.h>
static void
format_print (void *descr)
{
struct spec *spec = (struct spec *) descr;
unsigned int last;
unsigned int i;
if (spec == NULL)
{
printf ("INVALID");
return;
}
printf ("(");
last = 1;
for (i = 0; i < spec->numbered_arg_count; i++)
{
unsigned int number = spec->numbered[i].number;
if (i > 0)
printf (" ");
if (number < last)
abort ();
for (; last < number; last++)
printf ("_ ");
switch (spec->numbered[i].type)
{
case FAT_INTEGER:
printf ("i");
break;
case FAT_DOUBLE:
printf ("f");
break;
case FAT_CHAR:
printf ("c");
break;
case FAT_POINTER:
printf ("p");
break;
case FAT_ANY:
printf ("*");
break;
default:
abort ();
}
last = number + 1;
}
printf (")");
}
int
main ()
{
for (;;)
{
char *line = NULL;
size_t line_size = 0;
int line_len;
char *invalid_reason;
void *descr;
line_len = getline (&line, &line_size, stdin);
if (line_len < 0)
break;
if (line_len > 0 && line[line_len - 1] == '\n')
line[--line_len] = '\0';
invalid_reason = NULL;
descr = format_parse (line, false, NULL, &invalid_reason);
format_print (descr);
printf ("\n");
if (descr == NULL)
printf ("%s\n", invalid_reason);
free (invalid_reason);
free (line);
}
return 0;
}
/*
* For Emacs M-x compile
* Local Variables:
* compile-command: "/bin/sh ../libtool --tag=CC --mode=link gcc -o a.out -static -O -g -Wall -I.. -I../gnulib-lib -I../intl -DHAVE_CONFIG_H -DTEST format-boost.c ../gnulib-lib/libgettextlib.la"
* End:
*/
#endif /* TEST */
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