diff options
Diffstat (limited to 'lib/nl_langinfo.c')
| -rw-r--r-- | lib/nl_langinfo.c | 118 |
1 files changed, 84 insertions, 34 deletions
diff --git a/lib/nl_langinfo.c b/lib/nl_langinfo.c index ea26730..23299cb 100644 --- a/lib/nl_langinfo.c +++ b/lib/nl_langinfo.c @@ -1,6 +1,6 @@ /* nl_langinfo() replacement: query locale dependent information. - Copyright (C) 2007-2018 Free Software Foundation, Inc. + Copyright (C) 2007-2020 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 @@ -28,16 +28,33 @@ # include <stdio.h> #endif +/* nl_langinfo() must be multithread-safe. To achieve this without using + thread-local storage: + 1. We use a specific static buffer for each possible argument. + So that different threads can call nl_langinfo with different arguments, + without interfering. + 2. We use a simple strcpy or memcpy to fill this static buffer. Filling it + through, for example, strcpy + strcat would not be guaranteed to leave + the buffer's contents intact if another thread is currently accessing + it. If necessary, the contents is first assembled in a stack-allocated + buffer. */ + #if !REPLACE_NL_LANGINFO || GNULIB_defined_CODESET /* Return the codeset of the current locale, if this is easily deducible. Otherwise, return "". */ static char * ctype_codeset (void) { - static char buf[2 + 10 + 1]; - char const *locale = setlocale (LC_CTYPE, NULL); - char *codeset = buf; + static char result[2 + 10 + 1]; + char buf[2 + 10 + 1]; + char locale[SETLOCALE_NULL_MAX]; + char *codeset; size_t codesetlen; + + if (setlocale_null_r (LC_CTYPE, locale, sizeof (locale))) + locale[0] = '\0'; + + codeset = buf; codeset[0] = '\0'; if (locale && locale[0]) @@ -76,9 +93,20 @@ ctype_codeset (void) memmove (buf + 2, codeset, codesetlen + 1); else sprintf (buf + 2, "%u", GetACP ()); - codeset = memcpy (buf, "CP", 2); -# endif - return codeset; + /* For a locale name such as "French_France.65001", in Windows 10, + setlocale now returns "French_France.utf8" instead. */ + if (strcmp (buf + 2, "65001") == 0 || strcmp (buf + 2, "utf8") == 0) + return (char *) "UTF-8"; + else + { + memcpy (buf, "CP", 2); + strcpy (result, buf); + return result; + } +# else + strcpy (result, codeset); + return result; +#endif } #endif @@ -169,7 +197,7 @@ rpl_nl_langinfo (nl_item item) char * nl_langinfo (nl_item item) { - static char nlbuf[100]; + char buf[100]; struct tm tmm = { 0 }; switch (item) @@ -209,14 +237,22 @@ nl_langinfo (nl_item item) case T_FMT_AMPM: return (char *) "%I:%M:%S %p"; case AM_STR: - if (!strftime (nlbuf, sizeof nlbuf, "%p", &tmm)) - return (char *) "AM"; - return nlbuf; + { + static char result[80]; + if (!strftime (buf, sizeof result, "%p", &tmm)) + return (char *) "AM"; + strcpy (result, buf); + return result; + } case PM_STR: - tmm.tm_hour = 12; - if (!strftime (nlbuf, sizeof nlbuf, "%p", &tmm)) - return (char *) "PM"; - return nlbuf; + { + static char result[80]; + tmm.tm_hour = 12; + if (!strftime (buf, sizeof result, "%p", &tmm)) + return (char *) "PM"; + strcpy (result, buf); + return result; + } case DAY_1: case DAY_2: case DAY_3: @@ -225,14 +261,16 @@ nl_langinfo (nl_item item) case DAY_6: case DAY_7: { + static char result[7][50]; static char const days[][sizeof "Wednesday"] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" }; tmm.tm_wday = item - DAY_1; - if (!strftime (nlbuf, sizeof nlbuf, "%A", &tmm)) + if (!strftime (buf, sizeof result[0], "%A", &tmm)) return (char *) days[item - DAY_1]; - return nlbuf; + strcpy (result[item - DAY_1], buf); + return result[item - DAY_1]; } case ABDAY_1: case ABDAY_2: @@ -242,13 +280,15 @@ nl_langinfo (nl_item item) case ABDAY_6: case ABDAY_7: { + static char result[7][30]; static char const abdays[][sizeof "Sun"] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" }; tmm.tm_wday = item - ABDAY_1; - if (!strftime (nlbuf, sizeof nlbuf, "%a", &tmm)) + if (!strftime (buf, sizeof result[0], "%a", &tmm)) return (char *) abdays[item - ABDAY_1]; - return nlbuf; + strcpy (result[item - ABDAY_1], buf); + return result[item - ABDAY_1]; } { static char const months[][sizeof "September"] = { @@ -267,10 +307,14 @@ nl_langinfo (nl_item item) case MON_10: case MON_11: case MON_12: - tmm.tm_mon = item - MON_1; - if (!strftime (nlbuf, sizeof nlbuf, "%B", &tmm)) - return (char *) months[item - MON_1]; - return nlbuf; + { + static char result[12][50]; + tmm.tm_mon = item - MON_1; + if (!strftime (buf, sizeof result[0], "%B", &tmm)) + return (char *) months[item - MON_1]; + strcpy (result[item - MON_1], buf); + return result[item - MON_1]; + } case ALTMON_1: case ALTMON_2: case ALTMON_3: @@ -283,15 +327,19 @@ nl_langinfo (nl_item item) case ALTMON_10: case ALTMON_11: case ALTMON_12: - tmm.tm_mon = item - ALTMON_1; - /* The platforms without nl_langinfo() don't support strftime with %OB. - We don't even need to try. */ - #if 0 - if (!strftime (nlbuf, sizeof nlbuf, "%OB", &tmm)) - #endif - if (!strftime (nlbuf, sizeof nlbuf, "%B", &tmm)) - return (char *) months[item - ALTMON_1]; - return nlbuf; + { + static char result[12][50]; + tmm.tm_mon = item - ALTMON_1; + /* The platforms without nl_langinfo() don't support strftime with + %OB. We don't even need to try. */ + #if 0 + if (!strftime (buf, sizeof result[0], "%OB", &tmm)) + #endif + if (!strftime (buf, sizeof result[0], "%B", &tmm)) + return (char *) months[item - ALTMON_1]; + strcpy (result[item - ALTMON_1], buf); + return result[item - ALTMON_1]; + } } case ABMON_1: case ABMON_2: @@ -306,14 +354,16 @@ nl_langinfo (nl_item item) case ABMON_11: case ABMON_12: { + static char result[12][30]; static char const abmonths[][sizeof "Jan"] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Sep", "Oct", "Nov", "Dec" }; tmm.tm_mon = item - ABMON_1; - if (!strftime (nlbuf, sizeof nlbuf, "%b", &tmm)) + if (!strftime (buf, sizeof result[0], "%b", &tmm)) return (char *) abmonths[item - ABMON_1]; - return nlbuf; + strcpy (result[item - ABMON_1], buf); + return result[item - ABMON_1]; } case ERA: return (char *) ""; |