merge gb branch back

git-svn-id: http://opensvn.csie.org/pttbbs/trunk/pttbbs@1379 63ad8ddf-47c3-0310-b6dd-a9e9d9715204

1 files changed, 66 insertions, 0 deletions

diff --git a/mbbsd/convert.c b/mbbsd/convert.c
new file mode 100644
index 00000000..c7140d03
--- /dev/null
+++ b/mbbsd/convert.c
@@ -0,0 +1,66 @@
+/* $Id: convert.c 1374 2003-11-27 14:11:40Z victor $ */
+/*
+ * The following code is copied and modified from "autoconvert" with GPL.
+ */
+
+#include "convert.h"
+
+#define BtoG_bad1 0xa1
+#define BtoG_bad2 0xf5
+#define GtoB_bad1 0xa1
+#define GtoB_bad2 0xbc
+
+char *hzconvert(char *, int *, char *, void (*dbcvrt)());
+
+extern unsigned char GtoB[], BtoG[];
+
+#define	c1	(unsigned char)(s[0])
+#define	c2	(unsigned char)(s[1])
+
+static void g2b(char *s)
+{
+    unsigned int i;
+
+    if ((c2 >= 0xa1) && (c2 <= 0xfe)) {
+	if ((c1 >= 0xa1) && (c1 <= 0xa9)) {
+	    i = ((c1 - 0xa1) * 94 + (c2 - 0xa1)) * 2;
+	    s[0] = GtoB[i++];  s[1] = GtoB[i];
+	    return;
+	} else if ((c1 >= 0xb0) && (c1 <= 0xf7)) {
+	    i = ((c1 - 0xb0 + 9) * 94 + (c2 - 0xa1)) * 2;
+	    s[0] = GtoB[i++];  s[1] = GtoB[i];
+	    return;
+	}
+    }
+    s[0] = GtoB_bad1;  s[1] = GtoB_bad2;
+}
+
+static void b2g(char *s)
+{
+    int i;
+
+    if ((c1 >= 0xa1) && (c1 <= 0xf9)) {
+	if ((c2 >= 0x40) && (c2 <= 0x7e)) {
+	    i = ((c1 - 0xa1) * 157 + (c2 - 0x40)) * 2;
+	    s[0] = BtoG[i++];  s[1] = BtoG[i];
+	    return;
+	} else if ((c2 >= 0xa1) && (c2 <= 0xfe)) {
+	    i = ((c1 - 0xa1) * 157 + (c2 - 0xa1) + 63) * 2;
+	    s[0] = BtoG[i++];  s[1] = BtoG[i];
+	    return;
+	}
+    }
+    s[0] = BtoG_bad1;  s[1] = BtoG_bad2;
+}
+
+signed char *gb2big(unsigned char *s, int plen)
+{
+    unsigned char c = 0;
+    return hzconvert(s, &plen, &c, g2b);
+}
+
+unsigned char *big2gb(unsigned char *s, int plen)
+{
+    unsigned char c = 0;
+    return hzconvert(s, &plen, &c, b2g);
+}