Initial commit

engines/glk/unicode.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "glk/unicode.h"
+#include "glk/unicode_gen.h"
+#include "common/textconsole.h"
+
+namespace Glk {
+
+size_t strlen_uni(const uint32 *s) {
+	size_t len = 0;
+	while (*s++)
+		++len;
+	return len;
+}
+
+uint bufferChangeCase(uint32 *buf, uint len, uint numchars, BufferChangeCase destcase,
+						BufferChangeCond cond, int changerest) {
+	uint ix, jx;
+	uint32 *outbuf;
+	uint32 *newoutbuf;
+	uint outcount;
+	int dest_block_rest = 0, dest_block_first = 0;
+	int dest_spec_rest = 0, dest_spec_first = 0;
+
+	switch (cond) {
+	case COND_ALL:
+		dest_spec_rest = destcase;
+		dest_spec_first = destcase;
+		break;
+	case COND_LINESTART:
+		if (changerest)
+			dest_spec_rest = CASE_LOWER;
+		else
+			dest_spec_rest = CASE_IDENT;
+		dest_spec_first = destcase;
+		break;
+	default:
+		break;
+	}
+
+	dest_block_rest = dest_spec_rest;
+	if (dest_block_rest == CASE_TITLE)
+		dest_block_rest = CASE_UPPER;
+	dest_block_first = dest_spec_first;
+	if (dest_block_first == CASE_TITLE)
+		dest_block_first = CASE_UPPER;
+
+	newoutbuf = nullptr;
+	outcount = 0;
+	outbuf = buf;
+
+	for (ix = 0; ix < numchars; ix++) {
+		int target;
+		int isfirst;
+		uint res;
+		uint *special;
+		uint *ptr;
+		uint speccount;
+		uint32 ch = buf[ix];
+
+		isfirst = (ix == 0);
+
+		target = (isfirst ? dest_block_first : dest_block_rest);
+
+		if (target == CASE_IDENT) {
+			res = ch;
+		} else {
+			gli_case_block_t *block;
+
+			GET_CASE_BLOCK(ch, &block);
+			if (!block)
+				res = ch;
+			else
+				res = block[ch & 0xFF][target];
+		}
+
+		if (res != 0xFFFFFFFF || res == ch) {
+			// simple case
+			if (outcount < len)
+				outbuf[outcount] = res;
+			outcount++;
+			continue;
+		}
+
+		target = (isfirst ? dest_spec_first : dest_spec_rest);
+
+		// complicated cases
+		GET_CASE_SPECIAL(ch, &special);
+		if (!special) {
+			warning("inconsistency in cgunigen.c");
+			continue;
+		}
+		ptr = &unigen_special_array[special[target]];
+		speccount = *(ptr++);
+
+		if (speccount == 1) {
+			// simple after all
+			if (outcount < len)
+				outbuf[outcount] = ptr[0];
+			outcount++;
+			continue;
+		}
+
+		// Now we have to allocate a new buffer, if we haven't already.
+		if (!newoutbuf) {
+			newoutbuf = new uint32[len + 1];
+			if (!newoutbuf)
+				return 0;
+			if (outcount)
+				memcpy(newoutbuf, buf, outcount * sizeof(uint32));
+			outbuf = newoutbuf;
+		}
+
+		for (jx = 0; jx < speccount; jx++) {
+			if (outcount < len)
+				outbuf[outcount] = ptr[jx];
+			outcount++;
+		}
+	}
+
+	if (newoutbuf) {
+		uint finallen = outcount;
+		if (finallen > len)
+			finallen = len;
+		if (finallen)
+			memcpy(buf, newoutbuf, finallen * sizeof(uint));
+		delete[] newoutbuf;
+	}
+
+	return outcount;
+}
+
+} // End of namespace Glk