From 50aa5cd62ef4a66da41d68f4a50ddfca97863c38 Mon Sep 17 00:00:00 2001
From: "Suren A. Chilingaryan" <csa@dside.dyndns.org>
Date: Wed, 3 Aug 2005 18:24:08 +0000
Subject: Multithreading     - Multithreaded access to recoding functions using
 same context     - Engine plugin to select between UTF-8 and ISO8859-1 for
 Western European Languages     - Fix: 'rccTo' converting FS classes     - FS
 class support in 'rccConfigSizedToCharset'

---
 engines/western.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 engines/western.c

(limited to 'engines/western.c')

diff --git a/engines/western.c b/engines/western.c
new file mode 100644
index 0000000..4c6e1aa
--- /dev/null
+++ b/engines/western.c
@@ -0,0 +1,72 @@
+#include <stdio.h>
+#include <string.h>
+
+#include <librcc.h>
+
+#define bit(i) (1<<i)
+
+/* 
+ * Latin unicode subset:
+ * 0x100 - 0x17E
+ * 0x180 - 0x24F
+ * 0x1E00 - 0x1EFF
+ */
+
+static rcc_autocharset_id AutoengineWestern(rcc_engine_context ctx, const char *sbuf, int len) {
+    const unsigned char *buf = sbuf;
+    long i,j;
+    int bytes=0,rflag=0;
+    int res=0;
+
+    if (!len) len = strlen(buf);
+    for (i=0;i<len;i++) {
+	if (buf[i]<128) continue;
+	
+	if (bytes>0) {
+	    if ((buf[i]&0xC0)==0x80) {
+		if (rflag) {
+		    // Western is 0x100-0x17e
+		    res++;
+		}
+		bytes--;
+	    } else {
+		res--;
+		bytes=1-bytes;
+		rflag=0;
+	    }
+	} else {
+	    for (j=6;j>=0;j--)
+		if ((buf[i]&bit(j))==0) break;
+	    
+	    if ((j==0)||(j==6)) {
+		if ((j==6)&&(bytes<0)) bytes++;
+		else res--;
+		continue;
+	    }
+	    bytes=6-j;
+	    if (bytes==1) {
+		// Western Languages (C2-C3)
+		if (buf[i]==0xC2) rflag=1;
+		else if (buf[i]==0xC3) rflag=2;
+	    }
+	}
+	    
+	if ((buf[i]==0xC0)||(buf[i]==0xC1)) {
+	    if (i+1==len) break;
+	    	    
+	}
+    }
+
+    if (res > 0) return (rcc_autocharset_id)0;
+    return (rcc_autocharset_id)1;
+}
+
+static rcc_engine western_engine = {
+    "Western", NULL, NULL, &AutoengineWestern, {"UTF-8","ISO8859-1", NULL}
+};
+
+rcc_engine *rccGetInfo(const char *lang) {
+    if (!lang) return NULL;
+
+    return &western_engine;
+}
-- 
cgit v1.2.3