1 files changed, 41 insertions, 0 deletions
diff --git a/src/setjmp/__setjmp.c b/src/setjmp/__setjmp.c
new file mode 100644
index 00000000..cbd6a144
--- /dev/null
+++ b/src/setjmp/__setjmp.c
@@ -0,0 +1,41 @@
+#include <setjmp.h>
+#include <string.h>
+#include "_setjmp.h"
+#include "_safety.h"
+
+/** save program state **/
+
+int __setjmp(jmp_buf env)
+{
+	int ret = 0;
+	extern int ___setjmp(jmp_buf);
+	SIGNAL_SAFE(0);
+	memset(env, 0, sizeof(jmp_buf));
+	ret = ___setjmp(env);
+	ADD_JMP_BUF(env);
+	return ret;
+}
+
+CHECK_1(int, 0, __setjmp, jmp_buf)
+
+/***
+saves the current state of the calling environment
+in the TYPEDEF(jmp_buf) ARGUMENT(env).
+***/
+
+/*
+RETURN(0, the environment has been saved by THIS())
+RETURN(NONZERO, the environment has been restored by FUNCTION(longjmp))
+
+CONSTRAINT: entire controlling expression of a selection or iteration statement
+CONSTRAINT: one operand of a relational or equality operator which is the entire controlling expression of a selction or iteration statement
+CONSTRAINT: the operand of a unary ! as the entire controlling expression of a selection or iteration statement
+CONSTRAINT: an entire expression statement
+
+UNSPECIFIED(Whether THIS() is a macro or identifier with external linkage)
+
+UNDEFINED(A macro definition of THIS() is suppressed in order to access an actual function)
+UNDEFINED(A program defines an external identifier named LITERAL(setjmp))
+
+STDC(1)
+*/