minor overlay refactoring, syntax changes

1 files changed, 92 insertions, 0 deletions

diff --git a/src/encoding.h b/src/encoding.h
new file mode 100644
index 0000000..955482c
--- /dev/null
+++ b/src/encoding.h
@@ -0,0 +1,92 @@
+#ifndef ENCODING_H
+#define ENCODING_H
+
+#include <inttypes.h>
+
+typedef uint32_t unicode_t;
+
+// order must match the table in encoding.C(!)
+enum codeset {
+  CS_UNKNOWN = 0,
+  CS_US_ASCII,
+
+  CS_ISO8859_1,
+  CS_ISO8859_2,
+  CS_ISO8859_3,
+  CS_ISO8859_4,
+  CS_ISO8859_5,
+  CS_ISO8859_6,
+  CS_ISO8859_7,
+  CS_ISO8859_8,
+  CS_ISO8859_9,
+  CS_ISO8859_10,
+  CS_ISO8859_11,
+  CS_ISO8859_13,
+  CS_ISO8859_14,
+  CS_ISO8859_15,
+  CS_ISO8859_16,
+
+  CS_KOI8_R,
+  CS_KOI8_U,
+  CS_JIS0201_1976_0,
+  CS_JIS0208_1990_0,
+  CS_JIS0212_1990_0,
+  CS_JIS0213_1,
+  CS_JIS0213_2,
+
+  CS_KSC5601_1987_0,
+
+  CS_GB2312_1980_0,
+  CS_GBK_0,
+
+  CS_CNS11643_1992_1,
+  CS_CNS11643_1992_2,
+  CS_CNS11643_1992_3,
+  CS_CNS11643_1992_4,
+  CS_CNS11643_1992_5,
+  CS_CNS11643_1992_6,
+  CS_CNS11643_1992_7,
+  CS_CNS11643_1992_F,
+
+  CS_BIG5,
+  CS_BIG5_EXT,
+  CS_BIG5_PLUS,
+
+  CS_VISCII,
+
+  CS_UNICODE_16, /* 16-bit subset of unicode, for X11 */
+  CS_UNICODE,
+
+  NUM_CODESETS
+};
+
+codeset codeset_from_name (const char *name);
+
+enum {
+  ZERO_WIDTH_CHAR  = 0x200b,
+  REPLACEMENT_CHAR = 0xfffd,
+  NOCHAR           = 0xffff, // must be invalid in ANY codeset (!)
+};
+
+struct rxvt_codeset_conv
+{
+  uint32_t (*from_unicode) (unicode_t unicode);
+#if ENCODING_TO_UNICODE
+  unicode_t (*to_unicode) (uint32_t enc);
+#endif
+};
+
+extern const rxvt_codeset_conv rxvt_codeset[NUM_CODESETS];
+
+extern unicode_t rxvt_compose (unicode_t c1, unicode_t c2);
+
+#define FROM_UNICODE(cs,code) rxvt_codeset[cs].from_unicode (code)
+#define TO_UNICODE(cs,code)   rxvt_codeset[cs].to_unicode   (code)
+
+struct unicode // namespace für arme
+{
+  static bool is_space (unicode_t c);
+};
+
+#endif
+