fix buggy limiter handling in shgetc
this is needed for upcoming new scanf
diff --git a/src/internal/shgetc.c b/src/internal/shgetc.c
index e85d38a..96f72b6 100644
--- a/src/internal/shgetc.c
+++ b/src/internal/shgetc.c
@@ -4,7 +4,7 @@
{
f->shlim = lim;
f->shcnt = f->rend - f->rpos;
- if (lim && f->rend - f->rpos > lim)
+ if (lim && f->shcnt > lim)
f->shend = f->rpos + lim;
else
f->shend = f->rend;
@@ -13,15 +13,14 @@
int __shgetc(FILE *f)
{
int c;
- if (f->shlim && f->shcnt >= f->shlim) {
+ if (f->shlim && f->shcnt >= f->shlim || (c=__uflow(f)) < 0) {
f->shend = 0;
return EOF;
}
- c = __uflow(f);
if (f->shlim && f->rend - f->rpos > f->shlim - f->shcnt - 1)
f->shend = f->rpos + (f->shlim - f->shcnt - 1);
else
f->shend = f->rend;
- if (f->rend) f->shcnt += f->rend - f->buf;
+ if (f->rend) f->shcnt += f->rend - f->rpos + 1;
return c;
}