Add CJK codecs support as discussed on python-dev. (SF #873597)
Several style fixes are suggested by Martin v. Loewis and
Marc-Andre Lemburg. Thanks!
diff --git a/Modules/cjkcodecs/_cp950.c b/Modules/cjkcodecs/_cp950.c
new file mode 100644
index 0000000..b0644f0
--- /dev/null
+++ b/Modules/cjkcodecs/_cp950.c
@@ -0,0 +1,72 @@
+/*
+ * _cp950.c: the CP950 codec
+ *
+ * Written by Hye-Shik Chang <perky@FreeBSD.org>
+ * $CJKCodecs: _cp950.c,v 1.2 2003/12/31 05:46:55 perky Exp $
+ */
+
+#include "codeccommon.h"
+
+ENCMAP(big5)
+ENCMAP(cp950ext)
+DECMAP(big5)
+DECMAP(cp950ext)
+
+ENCODER(cp950)
+{
+ while (inleft > 0) {
+ Py_UNICODE c = IN1;
+ DBCHAR code;
+
+ if (c < 0x80) {
+ WRITE1(c)
+ NEXT(1, 1)
+ continue;
+ }
+ UCS4INVALID(c)
+
+ RESERVE_OUTBUF(2)
+ TRYMAP_ENC(cp950ext, code, c);
+ else TRYMAP_ENC(big5, code, c);
+ else return 1;
+
+ OUT1(code >> 8)
+ OUT2(code & 0xFF)
+ NEXT(1, 2)
+ }
+
+ return 0;
+}
+
+DECODER(cp950)
+{
+ while (inleft > 0) {
+ unsigned char c = IN1;
+
+ RESERVE_OUTBUF(1)
+
+ if (c < 0x80) {
+ OUT1(c)
+ NEXT(1, 1)
+ continue;
+ }
+
+ RESERVE_INBUF(2)
+
+ TRYMAP_DEC(cp950ext, **outbuf, c, IN2);
+ else TRYMAP_DEC(big5, **outbuf, c, IN2);
+ else return 2;
+
+ NEXT(2, 1)
+ }
+
+ return 0;
+}
+
+#include "codecentry.h"
+BEGIN_CODEC_REGISTRY(cp950)
+ MAPOPEN(zh_TW)
+ IMPORTMAP_ENCDEC(big5)
+ IMPORTMAP_ENCDEC(cp950ext)
+ MAPCLOSE()
+END_CODEC_REGISTRY(cp950)