1 files changed, 95 insertions, 0 deletions
diff --git a/app/tools/halibut/charset/xenc.c b/app/tools/halibut/charset/xenc.c
new file mode 100644
index 0000000..d27dafb
--- /dev/null
+++ b/app/tools/halibut/charset/xenc.c
@@ -0,0 +1,95 @@
+/*
+ * xenc.c - translate our internal character set codes to and from
+ * X11 character encoding names.
+ * 
+ */
+
+#include <ctype.h>
+#include "charset.h"
+#include "internal.h"
+
+static const struct {
+    const char *name;
+    int charset;
+} xencs[] = {
+    /*
+     * Officially registered encoding names. This list is derived
+     * from the font encodings section of
+     * 
+     *   http://ftp.x.org/pub/DOCS/registry
+     * 
+     * Where multiple encoding names map to the same encoding id
+     * (such as iso8859-15 and fcd8859-15), the first is considered
+     * canonical and will be returned when translating the id to a
+     * string.
+     */
+    { "iso646.1991-irv", CS_ASCII },
+    { "iso8859-1", CS_ISO8859_1 },
+    { "iso8859-2", CS_ISO8859_2 },
+    { "iso8859-3", CS_ISO8859_3 },
+    { "iso8859-4", CS_ISO8859_4 },
+    { "iso8859-5", CS_ISO8859_5 },
+    { "iso8859-6", CS_ISO8859_6 },
+    { "iso8859-7", CS_ISO8859_7 },
+    { "iso8859-8", CS_ISO8859_8 },
+    { "iso8859-9", CS_ISO8859_9 },
+    { "iso8859-10", CS_ISO8859_10 },
+    { "iso8859-13", CS_ISO8859_13 },
+    { "iso8859-14", CS_ISO8859_14 },
+    { "iso8859-15", CS_ISO8859_15 },
+    { "fcd8859-15", CS_ISO8859_15 },
+    { "hp-roman8", CS_HP_ROMAN8 },
+    { "koi8-r", CS_KOI8_R },
+    { "jisx0201.1976-0", CS_JISX0201 },
+    /*
+     * Unofficial encoding names found in the wild.
+     */
+    { "iso8859-16", CS_ISO8859_16 },
+    { "koi8-u", CS_KOI8_U },
+    { "ibm-cp437", CS_CP437 },
+    { "ibm-cp850", CS_CP850 },
+    { "ibm-cp866", CS_CP866 },
+    { "microsoft-cp1250", CS_CP1250 },
+    { "microsoft-cp1251", CS_CP1251 },
+    { "microsoft-cp1252", CS_CP1252 },
+    { "microsoft-cp1253", CS_CP1253 },
+    { "microsoft-cp1254", CS_CP1254 },
+    { "microsoft-cp1255", CS_CP1255 },
+    { "microsoft-cp1256", CS_CP1256 },
+    { "microsoft-cp1257", CS_CP1257 },
+    { "microsoft-cp1258", CS_CP1258 },
+    { "mac-roman", CS_MAC_ROMAN },
+    { "viscii1.1-1", CS_VISCII },
+    { "viscii1-1", CS_VISCII },
+};
+
+const char *charset_to_xenc(int charset)
+{
+    int i;
+
+    for (i = 0; i < (int)lenof(xencs); i++)
+	if (charset == xencs[i].charset)
+	    return xencs[i].name;
+
+    return NULL;		       /* not found */
+}
+
+int charset_from_xenc(const char *name)
+{
+    int i;
+
+    for (i = 0; i < (int)lenof(xencs); i++) {
+	const char *p, *q;
+	p = name;
+	q = xencs[i].name;
+	while (*p || *q) {
+	    if (tolower(*p) != tolower(*q))
+		break;
+	    p++; q++;
+	}
+	if (!*p && !*q)
+	    return xencs[i].charset;
+    }
+
+    return CS_NONE;		       /* not found */
+}