1 files changed, 24 insertions, 0 deletions
diff --git a/src/internal/shgetc.c b/src/internal/shgetc.c
new file mode 100644
index 00000000..7c4e58c1
--- /dev/null
+++ b/src/internal/shgetc.c
@@ -0,0 +1,24 @@
+#include "shgetc.h"
+
+void __shlim(FILE *f, off_t lim)
+{
+	f->shlim = lim;
+	f->shcnt = f->rend ? f->rend - f->buf : 0;
+	if (lim && f->rend - f->rpos > lim)
+		f->shend = f->rpos + lim;
+	else
+		f->shend = f->rend;
+}
+
+int __shgetc(FILE *f)
+{
+	int c;
+	if (f->shcnt >= f->shlim) 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;
+	return c;
+}