summaryrefslogtreecommitdiff
path: root/src/modules/filters/scsuutf8.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/modules/filters/scsuutf8.cpp')
-rw-r--r--src/modules/filters/scsuutf8.cpp246
1 files changed, 246 insertions, 0 deletions
diff --git a/src/modules/filters/scsuutf8.cpp b/src/modules/filters/scsuutf8.cpp
new file mode 100644
index 0000000..c68ea1f
--- /dev/null
+++ b/src/modules/filters/scsuutf8.cpp
@@ -0,0 +1,246 @@
+/******************************************************************************
+ *
+ * scsuutf8.cpp - SWFilter descendant to convert a SCSU character to
+ * UTF-8
+ *
+ * $Id: scsuutf8.cpp 2980 2013-09-14 21:51:47Z scribe $
+ *
+ * Copyright 2001-2013 CrossWire Bible Society (http://www.crosswire.org)
+ * CrossWire Bible Society
+ * P. O. Box 2528
+ * Tempe, AZ 85280-2528
+ *
+ * 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 version 2.
+ *
+ * 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.
+ *
+ */
+
+/* This class is based on:
+ * http://czyborra.com/scsu/scsu.c written by Roman Czyborra@dds.nl
+ * on Andrea's balcony in North Amsterdam on 1998-08-04
+ * Thanks to Richard Verhoeven <rcb5@win.tue.nl> for his suggestion
+ * to correct the haphazard "if" after UQU to "else if" on 1998-10-01
+ *
+ * This is a deflator to UTF-8 output for input compressed in SCSU,
+ * the (Reuters) Standard Compression Scheme for Unicode as described
+ * in http://www.unicode.org/unicode/reports/tr6.html
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <swmodule.h>
+
+#include <scsuutf8.h>
+
+
+SWORD_NAMESPACE_START
+
+
+SCSUUTF8::SCSUUTF8() {
+}
+
+
+unsigned char* SCSUUTF8::UTF8Output(unsigned long uchar, unsigned char* text)
+{
+ /* join UTF-16 surrogates without any pairing sanity checks */
+
+ static int d;
+
+ if (uchar >= 0xd800 && uchar <= 0xdbff) { d = uchar & 0x3f; return text; }
+ if (uchar >= 0xdc00 && uchar <= 0xdfff) { uchar = uchar + 0x2400 + d * 0x400; }
+
+ /* output one character as UTF-8 multibyte sequence */
+
+ if (uchar < 0x80) {
+ *text++ = c;
+ }
+ else if (uchar < 0x800) {
+ *text++ = 0xc0 | uchar >> 6;
+ *text++ = 0x80 | (uchar & 0x3f);
+ }
+ else if (uchar < 0x10000) {
+ *text++ = 0xe0 | uchar >> 12;
+ *text++ = 0x80 | (uchar >> 6 & 0x3f);
+ *text++ = 0x80 | (uchar & 0x3f);
+ }
+ else if (uchar < 0x200000) {
+ *text++ = 0xf0 | uchar >> 18;
+ *text++ = 0x80 | (uchar >> 12 & 0x3f);
+ *text++ = 0x80 | (uchar >> 6 & 0x3f);
+ *text++ = 0x80 | (uchar & 0x3f);
+ }
+
+ return text;
+}
+
+
+char SCSUUTF8::processText(SWBuf &text, const SWKey *key, const SWModule *module) {
+/*
+ unsigned char *to, *from;
+ unsigned long buflen = len * FILTERPAD;
+ char active = 0, mode = 0;
+ if ((unsigned long)key < 2) // hack, we're en(1)/de(0)ciphering
+ return -1;
+
+ static unsigned short start[8] = {0x0000,0x0080,0x0100,0x0300,0x2000,0x2080,0x2100,0x3000};
+ static unsigned short slide[8] = {0x0080,0x00C0,0x0400,0x0600,0x0900,0x3040,0x30A0,0xFF00};
+ static unsigned short win[256] = {
+ 0x0000, 0x0080, 0x0100, 0x0180, 0x0200, 0x0280, 0x0300, 0x0380,
+ 0x0400, 0x0480, 0x0500, 0x0580, 0x0600, 0x0680, 0x0700, 0x0780,
+ 0x0800, 0x0880, 0x0900, 0x0980, 0x0A00, 0x0A80, 0x0B00, 0x0B80,
+ 0x0C00, 0x0C80, 0x0D00, 0x0D80, 0x0E00, 0x0E80, 0x0F00, 0x0F80,
+ 0x1000, 0x1080, 0x1100, 0x1180, 0x1200, 0x1280, 0x1300, 0x1380,
+ 0x1400, 0x1480, 0x1500, 0x1580, 0x1600, 0x1680, 0x1700, 0x1780,
+ 0x1800, 0x1880, 0x1900, 0x1980, 0x1A00, 0x1A80, 0x1B00, 0x1B80,
+ 0x1C00, 0x1C80, 0x1D00, 0x1D80, 0x1E00, 0x1E80, 0x1F00, 0x1F80,
+ 0x2000, 0x2080, 0x2100, 0x2180, 0x2200, 0x2280, 0x2300, 0x2380,
+ 0x2400, 0x2480, 0x2500, 0x2580, 0x2600, 0x2680, 0x2700, 0x2780,
+ 0x2800, 0x2880, 0x2900, 0x2980, 0x2A00, 0x2A80, 0x2B00, 0x2B80,
+ 0x2C00, 0x2C80, 0x2D00, 0x2D80, 0x2E00, 0x2E80, 0x2F00, 0x2F80,
+ 0x3000, 0x3080, 0x3100, 0x3180, 0x3200, 0x3280, 0x3300, 0x3800,
+ 0xE000, 0xE080, 0xE100, 0xE180, 0xE200, 0xE280, 0xE300, 0xE380,
+ 0xE400, 0xE480, 0xE500, 0xE580, 0xE600, 0xE680, 0xE700, 0xE780,
+ 0xE800, 0xE880, 0xE900, 0xE980, 0xEA00, 0xEA80, 0xEB00, 0xEB80,
+ 0xEC00, 0xEC80, 0xED00, 0xED80, 0xEE00, 0xEE80, 0xEF00, 0xEF80,
+ 0xF000, 0xF080, 0xF100, 0xF180, 0xF200, 0xF280, 0xF300, 0xF380,
+ 0xF400, 0xF480, 0xF500, 0xF580, 0xF600, 0xF680, 0xF700, 0xF780,
+ 0xF800, 0xF880, 0xF900, 0xF980, 0xFA00, 0xFA80, 0xFB00, 0xFB80,
+ 0xFC00, 0xFC80, 0xFD00, 0xFD80, 0xFE00, 0xFE80, 0xFF00, 0xFF80,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x00C0, 0x0250, 0x0370, 0x0530, 0x3040, 0x30A0, 0xFF60
+ };
+
+ if (!len)
+ return 0;
+
+ memmove(&text[buflen - len], text, len);
+ from = (unsigned char*)&text[buflen - len];
+ to = (unsigned char *)text;
+
+ // -------------------------------
+
+ for (int i = 0; i < len;) {
+
+
+ if (i >= len) break;
+ c = from[i++];
+
+ if (c >= 0x80)
+ {
+ to = UTF8Output (c - 0x80 + slide[active], to);
+ }
+ else if (c >= 0x20 && c <= 0x7F)
+ {
+ to = UTF8Output (c, to);
+ }
+ else if (c == 0x0 || c == 0x9 || c == 0xA || c == 0xC || c == 0xD)
+ {
+ to = UTF8Output (c, to);
+ }
+ else if (c >= 0x1 && c <= 0x8) // SQn
+ {
+ if (i >= len) break;
+ d = from[i++]; // single quote
+
+ to = UTF8Output (d < 0x80 ? d + start [c - 0x1] :
+ d - 0x80 + slide [c - 0x1], to);
+ }
+ else if (c >= 0x10 && c <= 0x17) // SCn
+ {
+ active = c - 0x10; // change window
+ }
+ else if (c >= 0x18 && c <= 0x1F) // SDn
+ {
+ active = c - 0x18; // define window
+ if (i >= len) break;
+ slide [active] = win [from[i++]];
+ }
+ else if (c == 0xB) // SDX
+ {
+ if (i >= len) break;
+ c = from[i++];
+
+ if (i >= len) break;
+ d = from[i++];
+
+ slide [active = c>>5] = 0x10000 + (((c & 0x1F) << 8 | d) << 7);
+ }
+ else if (c == 0xE) // SQU
+ {
+ if (i >= len) break;
+ c = from[i++]; // SQU
+
+ if (i >= len) break;
+ to = UTF8Output (c << 8 | from[i++], to);
+ }
+ else if (c == 0xF) // SCU
+ {
+ mode = 1; // change to Unicode mode
+
+ while (mode)
+ {
+ if (i >= len) break;
+ c = from[i++];
+
+ if (c <= 0xDF || c >= 0xF3)
+ {
+ if (i >= len) break;
+ to = UTF8Output (c << 8 | from[i++], to);
+ }
+ else if (c == 0xF0) // UQU
+ {
+ if (i >= len) break;
+ c = from[i++];
+
+ if (i >= len) break;
+ to = UTF8Output (c << 8 | from[i++], to);
+ }
+ else if (c >= 0xE0 && c <= 0xE7) // UCn
+ {
+ active = c - 0xE0; mode = 0;
+ }
+ else if (c >= 0xE8 && c <= 0xEF) // UDn
+ {
+ if (i >= len) break;
+ slide [active=c-0xE8] = win [from[i++]]; mode = 0;
+ }
+ else if (c == 0xF1) // UDX
+ {
+ if (i >= len) break;
+ c = from[i++];
+
+ if (i >= len) break;
+ d = from[i++];
+
+ slide [active = c>>5] =
+ 0x10000 + (((c & 0x1F) << 8 | d) << 7); mode = 0;
+ }
+ }
+ }
+
+
+ }
+
+ *to++ = 0;
+ *to = 0;
+*/
+ return 0;
+}
+
+
+SWORD_NAMESPACE_END