1 files changed, 94 insertions, 0 deletions
diff --git a/src/fgetsintr.c b/src/fgetsintr.c
new file mode 100644
index 0000000..bda1ed8
--- /dev/null
+++ b/src/fgetsintr.c
@@ -0,0 +1,94 @@
+/***********************************************************
+Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
+Netherlands.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the names of Stichting Mathematisch
+Centrum or CWI not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior permission.
+
+STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
+THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
+FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/* Interruptable version of fgets().
+ Return < 0 for interrupted, 1 for EOF, 0 for valid input. */
+
+/* XXX This uses longjmp() from a signal out of fgets().
+ Should use read() instead?! */
+
+#include "pgenheaders.h"
+
+#include <signal.h>
+#include <setjmp.h>
+
+#include "errcode.h"
+#include "sigtype.h"
+#include "fgetsintr.h"
+
+#ifndef AMOEBA
+#define sig_block() /*empty*/
+#define sig_unblock() /*empty*/
+#endif
+
+static jmp_buf jback;
+
+static void catcher PROTO((int));
+
+static void
+catcher(sig)
+ int sig;
+{
+ longjmp(jback, 1);
+}
+
+int
+fgets_intr(buf, size, fp)
+ char *buf;
+ int size;
+ FILE *fp;
+{
+ int ret;
+ SIGTYPE (*sigsave)();
+
+ if (setjmp(jback)) {
+ clearerr(fp);
+ signal(SIGINT, sigsave);
+#ifdef THINK_C_3_0
+ Set_Echo(1);
+#endif
+ return E_INTR;
+ }
+
+ /* The casts to (SIGTYPE(*)()) are needed by THINK_C only */
+
+ sigsave = signal(SIGINT, (SIGTYPE(*)()) SIG_IGN);
+ if (sigsave != (SIGTYPE(*)()) SIG_IGN)
+ signal(SIGINT, (SIGTYPE(*)()) catcher);
+
+#ifndef THINK_C
+ if (intrcheck())
+ ret = E_INTR;
+ else
+#endif
+ {
+ sig_block();
+ ret = (fgets(buf, size, fp) == NULL) ? E_EOF : E_OK;
+ sig_unblock();
+ }
+
+ if (sigsave != (SIGTYPE(*)()) SIG_IGN)
+ signal(SIGINT, (SIGTYPE(*)()) sigsave);
+ return ret;
+}