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strfmon: Fix an edge case when sep_by_space is 2

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Fix an edge case by printing the required space when, the currency
symbol succeeds the value, a space separates the sign from the value and
the sign position precedes the quantity and the currency symbol.

In other words:

    n_cs_precedes = 0
    n_sep_by_space = 2
    n_sign_posn = 1

From The Open Group's localeconv[1]:

> When {p,n,int_p,int_n}_sep_by_space is 2:
> If the currency symbol and sign string are adjacent, a space separates
> them; otherwise, a space separates the sign string from the value.

    Format    Before        After
    [%n]      [-123.45¤]    [- 123.45¤]

[1]: https://pubs.opengroup.org/onlinepubs/9699919799/functions/localeconv.html

Obtained from:	Darwin
Reviewed by:	kib
PR:	267282
Github PR:	#619
MFC after:	1 week
This commit is contained in:
Jose Luis Duran 2022-10-17 23:24:03 -03:00 committed by Konstantin Belousov
parent 947efadc3d
commit 750fe3e6a4
2 changed files with 7 additions and 3 deletions
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8
lib/libc/stdlib/strfmon.c
View File

@ -296,7 +296,8 @@ vstrfmon_l(char * __restrict s, size_t maxsize, locale_t loc,
* non-negative value
* = 1 - space separates the symbol from the value
* = 2 - space separates the symbol and the sign string,
* if adjacent.
* if adjacent; otherwise, a space separates
* the sign string from the value
*
* p_sign_posn & n_sign_posn
*
@ -338,8 +339,11 @@ vstrfmon_l(char * __restrict s, size_t maxsize, locale_t loc,
} else if (sep_by_space == 1)
PRINT(space_char);
}
} else if (sign_posn == 1)
} else if (sign_posn == 1) {
PRINTS(signstr);
if (sep_by_space == 2)
PRINT(' ');
}
PRINTS(asciivalue);

2
lib/libc/tests/stdlib/strfmon_test.c
View File

@ -116,7 +116,7 @@ ATF_TC_BODY(strfmon_cs_precedes_0, tc)
/* sep_by_space x sign_posn */
{ "[(123.00$)] [-123.00$] [123.00$-] [123.00-$] [123.00$-]" },
{ "[(123.00 $)] [-123.00 $] [123.00 $-] [123.00 -$] [123.00 $-]" },
{ "[(123.00$)] [-123.00$] [123.00$ -] [123.00- $] [123.00$ -]" }, /* XXX */
{ "[(123.00$)] [- 123.00$] [123.00$ -] [123.00- $] [123.00$ -]" },
};
size_t i, j;
struct lconv *lc;