X-Git-Url: http://www.average.org/gitweb/?p=pam_pcsc_cr.git;a=blobdiff_plain;f=serial.c;fp=serial.c;h=0719746a52eb7c001a6605c716e1de62df7c1d11;hp=0000000000000000000000000000000000000000;hb=ecefc4912f36f9153e63e7e0ee90d8ef69898fed;hpb=55045da5118553f462a83ff65540ae026c44bdb0

diff --git a/serial.c b/serial.c
new file mode 100644
index 0000000..0719746
--- /dev/null
+++ b/serial.c
@@ -0,0 +1,47 @@
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include <string.h>
+#include "serial.h"
+
+int serial_init(serializer_t *srl, void *buffer, int size)
+{
+	srl->buffer = srl->cursor = buffer;
+	srl->bufsize = size;
+}
+
+int serial_switch(serializer_t *srl, void *buffer, int size)
+{
+	int used = srl->cursor - srl->buffer;
+
+	memcpy(buffer, srl->buffer, used);
+	srl->buffer = buffer;
+	srl->bufsize = size;
+	srl->cursor = buffer + used;
+}
+
+int serial_put(serializer_t *srl, void *item, int size)
+{
+	int left = srl->bufsize - (srl->cursor - srl->buffer);
+	if (left < size + sizeof(short)) return left - sizeof(short);
+	*((short *)srl->cursor) = size;
+	srl->cursor += 2;
+	if (size) memcpy(srl->cursor, item, size);
+	srl->cursor += size;
+	return size;
+}
+
+int serial_get(serializer_t *srl, void *item, int bufsize)
+{
+	short isize = *((short *)srl->cursor);
+	if (isize > bufsize || isize == 0) return isize;
+	srl->cursor += sizeof(short);
+	memcpy(item, srl->cursor, isize);
+	srl->cursor += isize;
+	return isize;
+}
+
+int serial_size(serializer_t *srl)
+{
+	return srl->cursor - srl->buffer;
+}