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git/gettext.h
Ævar Arnfjörð Bjarmason 153fb49e60 gettext: remove optional non-standard parens in N_() definition
Remove the USE_PARENS_AROUND_GETTEXT_N compile-time option which was
meant to catch an inadvertent mistake which is too obscure to
maintain this facility.

The backstory of how USE_PARENS_AROUND_GETTEXT_N came about is: When I
added the N_() macro in 65784830366 (i18n: add no-op _() and N_()
wrappers, 2011-02-22) it was defined as:

    #define N_(msgid) (msgid)

This is non-standard C, as was noticed and fixed in 642f85faab2 (i18n:
avoid parenthesized string as array initializer, 2011-04-07).
I.e. this needed to be defined as:

    #define N_(msgid) msgid

Then in e62cd35a3e8 (i18n: log: mark parseopt strings for translation,
2012-08-20) when "builtin_log_usage" was marked for translation the
string concatenation for passing to usage() added in 1c370ea4e51
(Show usage string for 'git log -h', 'git show -h' and 'git diff -h',
2009-08-06) was faithfully preserved:

-       "git log [<options>] [<since>..<until>] [[--] <path>...]\n"
-       "   or: git show [options] <object>...",
+       N_("git log [<options>] [<since>..<until>] [[--] <path>...]\n")
+       N_("   or: git show [options] <object>..."),

This was then fixed to be the expected array of usage strings in
e66dc0cc4b1 (log.c: fix translation markings, 2015-01-06) rather than
a string with multiple "\n"-delimited usage strings, and finally in
290c8e7a3fe (gettext.h: add parentheses around N_ expansion if
supported, 2015-01-11) USE_PARENS_AROUND_GETTEXT_N was added to ensure
this mistake didn't happen again.

I think that even if this was a N_()-specific issue this
USE_PARENS_AROUND_GETTEXT_N facility wouldn't be worth it, the issue
would be too rare to worry about.

But I also think that 290c8e7a3fe which introduced
USE_PARENS_AROUND_GETTEXT_N misattributed the problem. The issue
wasn't with the N_() macro added in e62cd35a3e8, but that before the
N_() macro existed in the codebase the initial migration to
parse_options() in 1c370ea4e51 continued passsing in a "\n"-delimited
string, when the new API it was migrating to supported and expected
the passing of an array.

Helped-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-09-03 11:40:30 -07:00

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1.3 KiB
C

/*
* Copyright (c) 2010-2011 Ævar Arnfjörð Bjarmason
*
* This is a skeleton no-op implementation of gettext for Git.
* You can replace it with something that uses libintl.h and wraps
* gettext() to try out the translations.
*/
#ifndef GETTEXT_H
#define GETTEXT_H
#if defined(_) || defined(Q_)
#error "namespace conflict: '_' or 'Q_' is pre-defined?"
#endif
#ifndef NO_GETTEXT
# include <libintl.h>
#else
# ifdef gettext
# undef gettext
# endif
# define gettext(s) (s)
# ifdef ngettext
# undef ngettext
# endif
# define ngettext(s, p, n) ((n == 1) ? (s) : (p))
#endif
#define FORMAT_PRESERVING(n) __attribute__((format_arg(n)))
#ifndef NO_GETTEXT
void git_setup_gettext(void);
int gettext_width(const char *s);
#else
static inline void git_setup_gettext(void)
{
}
static inline int gettext_width(const char *s)
{
return strlen(s);
}
#endif
static inline FORMAT_PRESERVING(1) const char *_(const char *msgid)
{
if (!*msgid)
return "";
return gettext(msgid);
}
static inline FORMAT_PRESERVING(1) FORMAT_PRESERVING(2)
const char *Q_(const char *msgid, const char *plu, unsigned long n)
{
return ngettext(msgid, plu, n);
}
/* Mark msgid for translation but do not translate it. */
#define N_(msgid) msgid
const char *get_preferred_languages(void);
int is_utf8_locale(void);
#endif