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add printing of null %s arguments as "(null)" in wide printf

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this is undefined, but supported in our implementation of the normal
printf, so for consistency the wide variant should support it too.
This commit is contained in:
Rich Felker 2015-06-13 04:42:38 +00:00
parent f9e25d8138
commit f8f565df46
1 changed files with 1 additions and 0 deletions
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src/stdio/vfwprintf.c
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@ -296,6 +296,7 @@ static int wprintf_core(FILE *f, const wchar_t *fmt, va_list *ap, union arg *nl_
case 'm':
arg.p = strerror(errno);
case 's':
if (!arg.p) arg.p = "(null)";
bs = arg.p;
if (p<0) p = INT_MAX;
for (i=l=0; l<p && (i=mbtowc(&wc, bs, MB_LEN_MAX))>0; bs+=i, l++);