From a4310aa2f592779118912fe5e7f6df4fd6b6d64a Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Mon, 16 Apr 2012 17:17:05 -0400 Subject: [PATCH] avoid hitting eof in wcstol shunget cannot unget eof status, causing wcstol to leave endptr pointing to the wrong place when scanning, for example, L"0x". cheap fix is to make the read function provide an infinite stream of bogus characters rather than eof. really this is something of a design flaw in how the shgetc system is used for strto* and wcsto*; in the long term, I believe multi-character unget should be scrapped and replaced with a function that can subtract from the f->shcnt counter. --- src/stdlib/wcstol.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/src/stdlib/wcstol.c b/src/stdlib/wcstol.c index cbdd8067..822bcf1a 100644 --- a/src/stdlib/wcstol.c +++ b/src/stdlib/wcstol.c @@ -11,6 +11,7 @@ static size_t do_read(FILE *f, unsigned char *buf, size_t len) size_t i; const wchar_t *wcs = f->cookie; + if (!wcs[0]) wcs=L"@"; for (i=0; ibuf_size && wcs[i]; i++) f->buf[i] = wcs[i] < 128 ? wcs[i] : '@'; f->rpos = f->buf; @@ -30,8 +31,8 @@ static unsigned long long wcstox(const wchar_t *s, wchar_t **p, int base, unsign FILE f = {0}; f.flags = 0; f.rpos = f.rend = 0; - f.buf = buf; - f.buf_size = sizeof buf; + f.buf = buf + 4; + f.buf_size = sizeof buf - 4; f.lock = -1; f.read = do_read; f.cookie = (void *)s; -- 2.25.1