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Fix os.date() for wider libc strftime() compatibility.

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Thanks to Jesper Lundgren.
This commit is contained in:
Mike Pall 2019-01-10 12:47:28 +01:00
parent c4f36ce565
commit fc63c938b5
1 changed files with 2 additions and 2 deletions
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4
src/lib_os.c
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@ -205,12 +205,12 @@ LJLIB_CF(os_date)
setboolfield(L, "isdst", stm->tm_isdst);
} else if (*s) {
SBuf *sb = &G(L)->tmpbuf;
MSize sz = 0;
MSize sz = 0, retry = 4;
const char *q;
for (q = s; *q; q++)
sz += (*q == '%') ? 30 : 1; /* Overflow doesn't matter. */
setsbufL(sb, L);
for (;;) {
while (retry--) { /* Limit growth for invalid format or empty result. */
char *buf = lj_buf_need(sb, sz);
size_t len = strftime(buf, sbufsz(sb), s, stm);
if (len) {