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localedef: Update LC_MONETARY handling (Bug 28845)
ISO C17, POSIX Issue 7, and ISO 30112 all allow the char* types to be empty strings i.e. "", integer or char values to be -1 or CHAR_MAX respectively, with the exception of decimal_point which must be non-empty in ISO C. Note that the defaults for mon_grouping vary, but are functionaly equivalent e.g. "\177" (no further grouping reuqired) vs. "" (no grouping defined for all groups). We include a broad comment talking about harmonizing ISO C, POSIX, ISO 30112, and the default C/POSIX locale for glibc. We reorder all setting based on locale/categories.def order. We soften all missing definitions from errors to warnings when defaults exist. Given that ISO C, POSIX and ISO 30112 allow the empty string we change LC_MONETARY handling of mon_decimal_point to allow the empty string. If mon_decimal_point is not defined at all then we pick the existing legacy glibc default value of <U002E> i.e. ".". We also set the default for mon_thousands_sep_wc at the same time as mon_thousands_sep, but this is not a change in behaviour, it is always either a matching value or L'\0', but if in the future we change the default to a non-empty string we would need to update both at the same time. Tested on x86_64 and i686 without regressions. Tested with install-locale-archive target. Tested with install-locale-files target. Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
Carlos O'Donell
parent
ea89d5bbd9
commit
2ab8b74567
@ -196,21 +196,105 @@ No definition for %s category found"), "LC_MONETARY");
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}
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}
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/* Generally speaking there are 3 standards the define the default,
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warning, and error behaviour of LC_MONETARY. They are ISO/IEC TR 30112,
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ISO/IEC 9899:2018 (ISO C17), and POSIX.1-2017. Within 30112 we have the
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definition of a standard i18n FDCC-set, which for LC_MONETARY has the
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following default values:
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int_curr_symbol ""
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currency_symbol ""
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mon_decimal_point "<U002C>" i.e. ","
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mon_thousand_sep ""
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mon_grouping "\177" i.e. CHAR_MAX
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positive_sign ""
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negative_sign "<U002E>" i.e. "."
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int_frac_digits -1
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frac_digits -1
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p_cs_precedes -1
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p_sep_by_space -1
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n_cs_precedes -1
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n_sep_by_space -1
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p_sign_posn -1
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n_sign_posn -1
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Under 30112 a keyword that is not provided implies an empty string ""
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for string values or a -1 for integer values, and indicates the value
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is unspecified with no default implied. No errors are considered.
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The exception is mon_grouping which is a string with a terminating
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CHAR_MAX.
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For POSIX Issue 7 we have:
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https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap07.html
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and again values not provided default to "" or -1, and indicate the value
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is not available to the locale. The exception is mon_grouping which is
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a string with a terminating CHAR_MAX. For the POSIX locale the values of
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LC_MONETARY should be:
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int_curr_symbol ""
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currency_symbol ""
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mon_decimal_point ""
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mon_thousands_sep ""
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mon_grouping "\177" i.e. CHAR_MAX
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positive_sign ""
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negative_sign ""
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int_frac_digits -1
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frac_digits -1
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p_cs_precedes -1
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p_sep_by_space -1
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n_cs_precedes -1
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n_sep_by_space -1
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p_sign_posn -1
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n_sign_posn -1
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int_p_cs_precedes -1
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int_p_sep_by_space -1
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int_n_cs_precedes -1
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int_n_sep_by_space -1
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int_p_sign_posn -1
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int_n_sign_posn -1
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Like with 30112, POSIX also considers no error if the keywords are
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missing, only that if the cateory as a whole is missing the referencing
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of the category results in unspecified behaviour.
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For ISO C17 there is no default value provided, but the localeconv
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specification in 7.11.2.1 admits that members of char * type may point
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to "" to indicate a value is not available or is of length zero.
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The exception is decimal_point (not mon_decimal_point) which must be a
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defined non-empty string. The values of char, which are generally
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mapped to integer values in 30112 and POSIX, must be non-negative
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numbers that map to CHAR_MAX when a value is not available in the
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locale.
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In ISO C17 for the "C" locale all values are empty strings "", or
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CHAR_MAX, with the exception of decimal_point which is "." (defined
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in LC_NUMERIC). ISO C17 makes no exception for mon_grouping like
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30112 and POSIX, but a value of "" is functionally equivalent to
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"\177" since neither defines a grouping (though the latter terminates
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the grouping).
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Lastly, we must consider the legacy C/POSIX locale that implemented
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as a builtin in glibc and wether a default value mapping to the
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C/POSIX locale may benefit the user from a compatibility perspective.
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Thus given 30112, POSIX, ISO C, and the builtin C/POSIX locale we
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need to pick appropriate defaults below. */
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/* The members of LC_MONETARY are handled in the order of their definition
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in locale/categories.def. Please keep them in that order. */
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/* The purpose of TEST_ELEM is to define a default value for the fields
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in the category if the field was not defined in the cateory. If the
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category was present but we didn't see a definition for the field then
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we also issue a warning, otherwise the only warning you get is the one
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earlier when a default category is created (completely missing category).
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This missing field warning is glibc-specific since no standard requires
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this warning, but we consider it valuable to print a warning for all
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missing fields in the category. */
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#define TEST_ELEM(cat, initval) \
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if (monetary->cat == NULL) \
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{ \
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if (! nothing) \
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record_error (0, 0, _("%s: field `%s' not defined"), \
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"LC_MONETARY", #cat); \
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record_warning (_("%s: field `%s' not defined"), \
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"LC_MONETARY", #cat); \
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monetary->cat = initval; \
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}
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/* Keyword: int_curr_symbol. */
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TEST_ELEM (int_curr_symbol, "");
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TEST_ELEM (currency_symbol, "");
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TEST_ELEM (mon_thousands_sep, "");
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TEST_ELEM (positive_sign, "");
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TEST_ELEM (negative_sign, "");
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/* The international currency symbol must come from ISO 4217. */
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if (monetary->int_curr_symbol != NULL)
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{
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@ -247,41 +331,63 @@ not correspond to a valid name in ISO 4217 [--no-warnings=intcurrsym]"),
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}
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}
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/* The decimal point must not be empty. This is not said explicitly
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in POSIX but ANSI C (ISO/IEC 9899) says in 4.4.2.1 it has to be
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!= "". */
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/* Keyword: currency_symbol */
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TEST_ELEM (currency_symbol, "");
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/* Keyword: mon_decimal_point */
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/* ISO C17 7.11.2.1.3 explicitly allows mon_decimal_point to be the
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empty string e.g. "". This indicates the value is not available in the
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current locale or is of zero length. However, if the value was never
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defined then we issue a warning and use a glibc-specific default. ISO
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30112 in the i18n FDCC-Set uses <U002C> ",", and POSIX Issue 7 in the
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POSIX locale uses "". It is specific to glibc that the default is <U002E>
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"."; we retain this existing behaviour for backwards compatibility. */
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if (monetary->mon_decimal_point == NULL)
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{
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if (! nothing)
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record_error (0, 0, _("%s: field `%s' not defined"),
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"LC_MONETARY", "mon_decimal_point");
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record_warning (_("%s: field `%s' not defined, using defaults"),
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"LC_MONETARY", "mon_decimal_point");
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monetary->mon_decimal_point = ".";
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monetary->mon_decimal_point_wc = L'.';
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}
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else if (monetary->mon_decimal_point[0] == '\0' && ! be_quiet && ! nothing)
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/* Keyword: mon_thousands_sep */
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if (monetary->mon_thousands_sep == NULL)
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{
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record_error (0, 0, _("\
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%s: value for field `%s' must not be an empty string"),
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"LC_MONETARY", "mon_decimal_point");
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if (! nothing)
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record_warning (_("%s: field `%s' not defined, using defaults"),
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"LC_MONETARY", "mon_thousands_sep");
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monetary->mon_thousands_sep = "";
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monetary->mon_thousands_sep_wc = L'\0';
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}
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/* Keyword: mon_grouping */
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if (monetary->mon_grouping_len == 0)
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{
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if (! nothing)
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record_error (0, 0, _("%s: field `%s' not defined"),
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"LC_MONETARY", "mon_grouping");
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record_warning (_("%s: field `%s' not defined"),
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"LC_MONETARY", "mon_grouping");
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/* Missing entries are given 1 element in their bytearray with
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a value of CHAR_MAX which indicates that "No further grouping
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is to be performed" (functionally equivalent to ISO C's "C"
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locale default of ""). */
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monetary->mon_grouping = (char *) "\177";
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monetary->mon_grouping_len = 1;
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}
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/* Keyword: positive_sign */
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TEST_ELEM (positive_sign, "");
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/* Keyword: negative_sign */
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TEST_ELEM (negative_sign, "");
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#undef TEST_ELEM
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#define TEST_ELEM(cat, min, max, initval) \
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if (monetary->cat == -2) \
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{ \
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if (! nothing) \
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record_error (0, 0, _("%s: field `%s' not defined"), \
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"LC_MONETARY", #cat); \
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record_warning (_("%s: field `%s' not defined"), \
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"LC_MONETARY", #cat); \
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monetary->cat = initval; \
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} \
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else if ((monetary->cat < min || monetary->cat > max) \
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@ -300,16 +406,11 @@ not correspond to a valid name in ISO 4217 [--no-warnings=intcurrsym]"),
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TEST_ELEM (p_sign_posn, -1, 4, -1);
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TEST_ELEM (n_sign_posn, -1, 4, -1);
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/* The non-POSIX.2 extensions are optional. */
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if (monetary->duo_int_curr_symbol == NULL)
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monetary->duo_int_curr_symbol = monetary->int_curr_symbol;
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if (monetary->duo_currency_symbol == NULL)
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monetary->duo_currency_symbol = monetary->currency_symbol;
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if (monetary->duo_int_frac_digits == -2)
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monetary->duo_int_frac_digits = monetary->int_frac_digits;
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if (monetary->duo_frac_digits == -2)
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monetary->duo_frac_digits = monetary->frac_digits;
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/* Keyword: crncystr */
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monetary->crncystr = (char *) xmalloc (strlen (monetary->currency_symbol)
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+ 2);
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monetary->crncystr[0] = monetary->p_cs_precedes ? '-' : '+';
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strcpy (&monetary->crncystr[1], monetary->currency_symbol);
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#undef TEST_ELEM
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#define TEST_ELEM(cat, alt, min, max) \
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@ -327,6 +428,17 @@ not correspond to a valid name in ISO 4217 [--no-warnings=intcurrsym]"),
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TEST_ELEM (int_p_sign_posn, p_sign_posn, -1, 4);
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TEST_ELEM (int_n_sign_posn, n_sign_posn, -1, 4);
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/* The non-POSIX.2 extensions are optional. */
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if (monetary->duo_int_curr_symbol == NULL)
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monetary->duo_int_curr_symbol = monetary->int_curr_symbol;
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if (monetary->duo_currency_symbol == NULL)
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monetary->duo_currency_symbol = monetary->currency_symbol;
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if (monetary->duo_int_frac_digits == -2)
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monetary->duo_int_frac_digits = monetary->int_frac_digits;
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if (monetary->duo_frac_digits == -2)
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monetary->duo_frac_digits = monetary->frac_digits;
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TEST_ELEM (duo_p_cs_precedes, p_cs_precedes, -1, 1);
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TEST_ELEM (duo_p_sep_by_space, p_sep_by_space, -1, 2);
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TEST_ELEM (duo_n_cs_precedes, n_cs_precedes, -1, 1);
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@ -349,17 +461,15 @@ not correspond to a valid name in ISO 4217 [--no-warnings=intcurrsym]"),
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if (monetary->duo_valid_to == 0)
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monetary->duo_valid_to = 99991231;
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/* Keyword: conversion_rate */
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if (monetary->conversion_rate[0] == 0)
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{
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monetary->conversion_rate[0] = 1;
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monetary->conversion_rate[1] = 1;
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}
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/* Create the crncystr entry. */
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monetary->crncystr = (char *) xmalloc (strlen (monetary->currency_symbol)
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+ 2);
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monetary->crncystr[0] = monetary->p_cs_precedes ? '-' : '+';
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strcpy (&monetary->crncystr[1], monetary->currency_symbol);
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/* A value for monetary-decimal-point-wc was set when
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monetary_decimal_point was set, likewise for monetary-thousands-sep-wc. */
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}
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