1 files changed, 56 insertions, 0 deletions
diff --git a/src/tutorial/C-code/funcs.c b/src/tutorial/C-code/funcs.c
new file mode 100644
index 00000000000..f91b4d62058
--- /dev/null
+++ b/src/tutorial/C-code/funcs.c
@@ -0,0 +1,56 @@
+#include <string.h>
+#include <stdio.h>
+#include "postgres.h"	  /* for char16, etc. */
+#include "utils/palloc.h" /* for palloc */
+#include "libpq-fe.h" /* for TUPLE */
+
+int
+add_one(int arg)
+{
+    return(arg + 1);
+}
+
+char16 *
+concat16(char16 *arg1, char16 *arg2)
+{
+    char16 *new_c16 = (char16 *) palloc(sizeof(char16));
+
+    memset(new_c16, 0, sizeof(char16));
+    (void) strncpy((char*)new_c16, (char*)arg1, 16);
+    return (char16 *)(strncat((char*)new_c16, (char*)arg2, 16));
+}
+
+text *
+copytext(text *t)
+{
+    /*
+     * VARSIZE is the total size of the struct in bytes.
+     */
+    text *new_t = (text *) palloc(VARSIZE(t));
+    
+    memset(new_t, 0, VARSIZE(t));
+
+    VARSIZE(new_t) = VARSIZE(t);
+    /*
+     * VARDATA is a pointer to the data region of the struct.
+     */
+    memcpy((void *) VARDATA(new_t), /* destination */
+           (void *) VARDATA(t),     /* source */
+           VARSIZE(t)-VARHDRSZ);              /* how many bytes */
+
+    return(new_t);
+}
+
+bool
+c_overpaid(TUPLE t,	/* the current instance of EMP */
+	   int4 limit) 
+{
+    bool isnull = false;
+    int4 salary;
+
+    salary = (int4) GetAttributeByName(t, "salary", &isnull);
+
+    if (isnull)
+	return (false);
+    return(salary > limit);
+}