--- /dev/null
+/*
+ * sbcs.c - routines to handle single-byte character sets.
+ */
+
+#include "charset.h"
+#include "internal.h"
+
+/*
+ * The charset_spec for any single-byte character set should
+ * provide read_sbcs() as its read function, and its `data' field
+ * should be a wchar_t string constant containing the 256 entries
+ * of the translation table.
+ */
+
+void read_sbcs(charset_spec const *charset, long int input_chr,
+ charset_state *state,
+ void (*emit)(void *ctx, long int output), void *emitctx)
+{
+ wchar_t const *table = (wchar_t const *)charset->data;
+
+ UNUSEDARG(state);
+
+ emit(emitctx, table[input_chr]);
+}
+
+void write_sbcs(charset_spec const *charset, long int input_chr,
+ charset_state *state,
+ void (*emit)(void *ctx, long int output), void *emitctx)
+{
+ wchar_t const *table = (wchar_t const *)charset->data;
+ int i;
+
+ UNUSEDARG(state);
+
+ /*
+ * FIXME: this should work, but it's ludicrously inefficient.
+ * We should be using the ucs2sbcs table.
+ */
+ for (i = 0; i < 256; i++)
+ if (table[i] == input_chr) {
+ emit(emitctx, i);
+ return;
+ }
+ emit(emitctx, ERROR);
+}