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Diffstat (limited to 'src/modules/filters/scsuutf8.cpp')
-rw-r--r--src/modules/filters/scsuutf8.cpp381
1 files changed, 199 insertions, 182 deletions
diff --git a/src/modules/filters/scsuutf8.cpp b/src/modules/filters/scsuutf8.cpp
index c68ea1f..73e4a3f 100644
--- a/src/modules/filters/scsuutf8.cpp
+++ b/src/modules/filters/scsuutf8.cpp
@@ -3,9 +3,9 @@
* scsuutf8.cpp - SWFilter descendant to convert a SCSU character to
* UTF-8
*
- * $Id: scsuutf8.cpp 2980 2013-09-14 21:51:47Z scribe $
+ * $Id: scsuutf8.cpp 3472 2017-05-22 04:19:02Z scribe $
*
- * Copyright 2001-2013 CrossWire Bible Society (http://www.crosswire.org)
+ * Copyright 2001-2014 CrossWire Bible Society (http://www.crosswire.org)
* CrossWire Bible Society
* P. O. Box 2528
* Tempe, AZ 85280-2528
@@ -23,223 +23,240 @@
/* 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>
+#include <swbuf.h>
+#ifdef _ICU_
+#include <unicode/unistr.h>
+#endif
+
SWORD_NAMESPACE_START
SCSUUTF8::SCSUUTF8() {
+#ifdef _ICU_
+ // initialize SCSU converter
+ scsuConv = ucnv_open("SCSU", &err);
+ // initialize UTF-8 converter
+ utf8Conv = ucnv_open("UTF-8", &err);
+#else
+ active = 0;
+ mode = 0;
+#endif
}
-
-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;
+SCSUUTF8::~SCSUUTF8() {
+#ifdef _ICU_
+ ucnv_close(scsuConv);
+ ucnv_close(utf8Conv);
+#endif
}
-
-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);
+#ifndef _ICU_
+unsigned short SCSUUTF8::start[] = {0x0000,0x0080,0x0100,0x0300,0x2000,0x2080,0x2100,0x3000};
+unsigned short SCSUUTF8::slide[] = {0x0080,0x00C0,0x0400,0x0600,0x0900,0x3040,0x30A0,0xFF00};
+unsigned short SCSUUTF8::win[] = {
+ 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,
+};
+
+int SCSUUTF8::UTF8Output(unsigned long uchar, SWBuf* utf8Buf)
+{
+ // join UTF-16 surrogates without any pairing sanity checks
+ if (uchar >= 0xd800 && uchar <= 0xdbff) {
+ d = uchar & 0x3ff;
+ return 0;
}
- else if (c >= 0x20 && c <= 0x7F)
- {
- to = UTF8Output (c, to);
+ if (uchar >= 0xdc00 && uchar <= 0xdfff) {
+ uchar = uchar + 0x2400 + d * 0x400;
}
- else if (c == 0x0 || c == 0x9 || c == 0xA || c == 0xC || c == 0xD)
- {
- to = UTF8Output (c, to);
+
+ // output one character as UTF-8 multibyte sequence
+
+ if (uchar < 0x80) {
+ utf8Buf += uchar;
}
- 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 (uchar < 0x800) {
+ utf8Buf += (0xc0 | (uchar>>6));
+ utf8Buf += (0x80 | (uchar & 0x3f));
}
- else if (c >= 0x10 && c <= 0x17) // SCn
- {
- active = c - 0x10; // change window
+ else if (uchar < 0x10000) {
+ utf8Buf += (0xe0 | (uchar>>12));
+ utf8Buf += (0x80 | (uchar>>6 & 0x3f));
+ utf8Buf += (0x80 | (uchar & 0x3f));
}
- else if (c >= 0x18 && c <= 0x1F) // SDn
- {
- active = c - 0x18; // define window
- if (i >= len) break;
- slide [active] = win [from[i++]];
+ else if (uchar < 0x200000) {
+ utf8Buf += (0xf0 | (uchar>>18));
+ utf8Buf += (0x80 | (uchar>>12 & 0x3f));
+ utf8Buf += (0x80 | (uchar>>6 & 0x3f));
+ utf8Buf += (0x80 | (uchar & 0x3f));
}
- else if (c == 0xB) // SDX
- {
- if (i >= len) break;
- c = from[i++];
-
- if (i >= len) break;
- d = from[i++];
+
+ return 0;
+}
+#endif
- slide [active = c>>5] = 0x10000 + (((c & 0x1F) << 8 | d) << 7);
+char SCSUUTF8::processText(SWBuf &text, const SWKey *key, const SWModule *module) {
+ if ((unsigned long)key < 2) // hack, we're en(1)/de(0)ciphering
+ return -1;
+
+#ifdef _ICU_
+ // Try decoding with ICU if possible
+ err = U_ZERO_ERROR;
+ UnicodeString utf16Text(text.getRawData(), text.length(), scsuConv, err);
+ err = U_ZERO_ERROR;
+ int32_t len = utf16Text.extract(text.getRawData(), text.size(), utf8Conv, err);
+ if (len > (int32_t)text.size()+1) {
+ text.setSize(len+1);
+ utf16Text.extract(text.getRawData(), text.size(), utf8Conv, err);
}
- else if (c == 0xE) // SQU
- {
+#else
+ // If ICU is unavailable, decode using Czyborra's decoder
+ SWBuf utf8Buf = "";
+ int len = text.length();
+ const char* scsuString = text.c_str();
+
+ for (int i = 0; i < len;) {
+
if (i >= len) break;
- c = from[i++]; // SQU
-
- if (i >= len) break;
- to = UTF8Output (c << 8 | from[i++], to);
+ c = scsuString[i++];
+
+ if (c >= 0x80)
+ {
+ UTF8Output(c - 0x80 + slide[active], &utf8Buf);
}
- 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)
+ else if (c >= 0x20 && c <= 0x7F)
{
- if (i >= len) break;
- to = UTF8Output (c << 8 | from[i++], to);
+ UTF8Output(c, &utf8Buf);
}
- else if (c == 0xF0) // UQU
+ else if (c == 0x0 || c == 0x9 || c == 0xA || c == 0xC || c == 0xD)
{
- if (i >= len) break;
- c = from[i++];
-
- if (i >= len) break;
- to = UTF8Output (c << 8 | from[i++], to);
+ UTF8Output(c, &utf8Buf);
}
- else if (c >= 0xE0 && c <= 0xE7) // UCn
+ else if (c >= 0x1 && c <= 0x8) // SQn
{
- active = c - 0xE0; mode = 0;
+ if (i >= len) break;
+ d = scsuString[i++]; // single quote
+
+ UTF8Output(d < 0x80 ? d + start[c - 0x1] :
+ d - 0x80 + slide[c - 0x1], &utf8Buf);
}
- else if (c >= 0xE8 && c <= 0xEF) // UDn
+ else if (c >= 0x10 && c <= 0x17) // SCn
{
- if (i >= len) break;
- slide [active=c-0xE8] = win [from[i++]]; mode = 0;
+ active = c - 0x10; // change window
}
- else if (c == 0xF1) // UDX
+ else if (c >= 0x18 && c <= 0x1F) // SDn
{
- 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;
+ active = c - 0x18; // define window
+ if (i >= len) break;
+ slide[active] = win[(unsigned char)scsuString[i++]];
+ }
+ else if (c == 0xB) // SDX
+ {
+ if (i >= len) break;
+ c = scsuString[i++];
+
+ if (i >= len) break;
+ d = scsuString[i++];
+
+ slide[active = c>>5] = 0x10000 + (((c & 0x1F) << 8 | d) << 7);
+ }
+ else if (c == 0xE) // SQU
+ {
+ if (i >= len) break;
+ c = scsuString[i++]; // SQU
+
+ if (i >= len) break;
+ UTF8Output(c << 8 | scsuString[i++], &utf8Buf);
+ }
+ else if (c == 0xF) // SCU
+ {
+ mode = 1; // change to Unicode mode
+
+ while (mode)
+ {
+ if (i >= len) break;
+ c = scsuString[i++];
+
+ if (c <= 0xDF || c >= 0xF3)
+ {
+ if (i >= len) break;
+ UTF8Output(c << 8 | scsuString[i++], &utf8Buf);
+ }
+ else if (c == 0xF0) // UQU
+ {
+ if (i >= len) break;
+ c = scsuString[i++];
+
+ if (i >= len) break;
+ UTF8Output(c << 8 | scsuString[i++], &utf8Buf);
+ }
+ 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[(unsigned char)scsuString[i++]];
+ mode = 0;
+ }
+ else if (c == 0xF1) // UDX
+ {
+ if (i >= len) break;
+ c = scsuString[i++];
+
+ if (i >= len) break;
+ d = scsuString[i++];
+
+ slide[active = c>>5] =
+ 0x10000 + (((c & 0x1F) << 8 | d) << 7);
+ mode = 0;
+ }
+ }
}
- }
}
-
-
- }
-
- *to++ = 0;
- *to = 0;
-*/
- return 0;
+#endif
+
+ return 0;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 07:15:01 +0000