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-rw-r--r--.metadata.txt4
-rw-r--r--CVTUTF.C331
-rw-r--r--CVTUTF.H106
-rw-r--r--CVTUTF7.C300
-rw-r--r--CVTUTF7.H80
5 files changed, 821 insertions, 0 deletions
diff --git a/.metadata.txt b/.metadata.txt
new file mode 100644
index 0000000..348ca97
--- /dev/null
+++ b/.metadata.txt
@@ -0,0 +1,4 @@
+CVTUTF.C 1998-01-27 16:51
+CVTUTF.H 1998-01-27 16:51
+CVTUTF7.C 1998-01-27 16:51
+CVTUTF7.H 1998-01-27 16:51
diff --git a/CVTUTF.C b/CVTUTF.C
new file mode 100644
index 0000000..94898bc
--- /dev/null
+++ b/CVTUTF.C
@@ -0,0 +1,331 @@
+/* ================================================================ */
+/*
+File: ConvertUTF.C
+Author: Mark E. Davis
+Copyright (C) 1994 Taligent, Inc. All rights reserved.
+
+This code is copyrighted. Under the copyright laws, this code may not
+be copied, in whole or part, without prior written consent of Taligent.
+
+Taligent grants the right to use or reprint this code as long as this
+ENTIRE copyright notice is reproduced in the code or reproduction.
+The code is provided AS-IS, AND TALIGENT DISCLAIMS ALL WARRANTIES,
+EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN
+NO EVENT WILL TALIGENT BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING,
+WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
+INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY
+LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CODE, EVEN
+IF TALIGENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
+LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE
+LIMITATION MAY NOT APPLY TO YOU.
+
+RESTRICTED RIGHTS LEGEND: Use, duplication, or disclosure by the
+government is subject to restrictions as set forth in subparagraph
+(c)(l)(ii) of the Rights in Technical Data and Computer Software
+clause at DFARS 252.227-7013 and FAR 52.227-19.
+
+This code may be protected by one or more U.S. and International
+Patents.
+
+TRADEMARKS: Taligent and the Taligent Design Mark are registered
+trademarks of Taligent, Inc.
+*/
+/* ================================================================ */
+
+#include "CVTUTF.H"
+
+/* ================================================================ */
+
+const int halfShift = 10;
+const UCS4 halfBase = 0x0010000UL;
+const UCS4 halfMask = 0x3FFUL;
+const UCS4 kSurrogateHighStart = 0xD800UL;
+const UCS4 kSurrogateHighEnd = 0xDBFFUL;
+const UCS4 kSurrogateLowStart = 0xDC00UL;
+const UCS4 kSurrogateLowEnd = 0xDFFFUL;
+
+/* ================================================================ */
+
+ConversionResult ConvertUCS4toUTF16 (
+ UCS4** sourceStart, const UCS4* sourceEnd,
+ UTF16** targetStart, const UTF16* targetEnd) {
+ ConversionResult result = ok;
+ register UCS4* source = *sourceStart;
+ register UTF16* target = *targetStart;
+ while (source < sourceEnd) {
+ register UCS4 ch;
+ if (target >= targetEnd) {
+ result = targetExhausted; break;
+ };
+ ch = *source++;
+ if (ch <= kMaximumUCS2) {
+ *target++ = ch;
+ } else if (ch > kMaximumUTF16) {
+ *target++ = kReplacementCharacter;
+ } else {
+ if (target + 1 >= targetEnd) {
+ result = targetExhausted; break;
+ };
+ ch -= halfBase;
+ *target++ = (ch >> halfShift) + kSurrogateHighStart;
+ *target++ = (ch & halfMask) + kSurrogateLowStart;
+ };
+ };
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+};
+
+/* ================================================================ */
+
+ConversionResult ConvertUTF16toUCS4 (
+ UTF16** sourceStart, UTF16* sourceEnd,
+ UCS4** targetStart, const UCS4* targetEnd) {
+ ConversionResult result = ok;
+ register UTF16* source = *sourceStart;
+ register UCS4* target = *targetStart;
+ while (source < sourceEnd) {
+ register UCS4 ch;
+ ch = *source++;
+ if (ch >= kSurrogateHighStart && ch <= kSurrogateHighEnd && source < sourceEnd) {
+ register UCS4 ch2 = *source;
+ if (ch2 >= kSurrogateLowStart && ch2 <= kSurrogateLowEnd) {
+ ch = ((ch - kSurrogateHighStart) << halfShift)
+ + (ch2 - kSurrogateLowStart) + halfBase;
+ ++source;
+ };
+ };
+ if (target >= targetEnd) {
+ result = targetExhausted; break;
+ };
+ *target++ = ch;
+ };
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+};
+
+/* ================================================================ */
+
+UCS4 offsetsFromUTF8[6] = {0x00000000UL, 0x00003080UL, 0x000E2080UL,
+ 0x03C82080UL, 0xFA082080UL, 0x82082080UL};
+char bytesFromUTF8[256] = {
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+ 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+ 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5};
+
+UTF8 firstByteMark[7] = {0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC};
+
+/* ================================================================ */
+/* This code is similar in effect to making successive calls on the
+mbtowc and wctomb routines in FSS-UTF. However, it is considerably
+different in code:
+* it is adapted to be consistent with UTF16,
+* the interface converts a whole buffer to avoid function-call overhead
+* constants have been gathered.
+* loops & conditionals have been removed as much as possible for
+efficiency, in favor of drop-through switch statements.
+*/
+
+/* ================================================================ */
+ConversionResult ConvertUTF16toUTF8 (
+ UTF16** sourceStart, const UTF16* sourceEnd,
+ UTF8** targetStart, const UTF8* targetEnd)
+{
+ ConversionResult result = ok;
+ register UTF16* source = *sourceStart;
+ register UTF8* target = *targetStart;
+ while (source < sourceEnd) {
+ register UCS4 ch;
+ register unsigned short bytesToWrite = 0;
+ register const UCS4 byteMask = 0xBF;
+ register const UCS4 byteMark = 0x80;
+ ch = *source++;
+ if (ch >= kSurrogateHighStart && ch <= kSurrogateHighEnd
+ && source < sourceEnd) {
+ register UCS4 ch2 = *source;
+ if (ch2 >= kSurrogateLowStart && ch2 <= kSurrogateLowEnd) {
+ ch = ((ch - kSurrogateHighStart) << halfShift)
+ + (ch2 - kSurrogateLowStart) + halfBase;
+ ++source;
+ };
+ };
+ if (ch < 0x80) { bytesToWrite = 1;
+ } else if (ch < 0x800) { bytesToWrite = 2;
+ } else if (ch < 0x10000) { bytesToWrite = 3;
+ } else if (ch < 0x200000) { bytesToWrite = 4;
+ } else if (ch < 0x4000000) { bytesToWrite = 5;
+ } else if (ch <= kMaximumUCS4){ bytesToWrite = 6;
+ } else { bytesToWrite = 2;
+ ch = kReplacementCharacter;
+ }; /* I wish there were a smart way to avoid this conditional */
+
+ target += bytesToWrite;
+ if (target > targetEnd) {
+ target -= bytesToWrite; result = targetExhausted; break;
+ };
+ switch (bytesToWrite) { /* note: code falls through cases! */
+ case 6: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 5: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 4: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 3: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 2: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 1: *--target = ch | firstByteMark[bytesToWrite];
+ };
+ target += bytesToWrite;
+ };
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+};
+
+/* ================================================================ */
+
+ConversionResult ConvertUTF8toUTF16 (
+ UTF8** sourceStart, UTF8* sourceEnd,
+ UTF16** targetStart, const UTF16* targetEnd)
+{
+ ConversionResult result = ok;
+ register UTF8* source = *sourceStart;
+ register UTF16* target = *targetStart;
+ while (source < sourceEnd) {
+ register UCS4 ch = 0;
+ register unsigned short extraBytesToWrite = bytesFromUTF8[*source];
+ if (source + extraBytesToWrite > sourceEnd) {
+ result = sourceExhausted; break;
+ };
+ switch(extraBytesToWrite) { /* note: code falls through cases! */
+ case 5: ch += *source++; ch <<= 6;
+ case 4: ch += *source++; ch <<= 6;
+ case 3: ch += *source++; ch <<= 6;
+ case 2: ch += *source++; ch <<= 6;
+ case 1: ch += *source++; ch <<= 6;
+ case 0: ch += *source++;
+ };
+ ch -= offsetsFromUTF8[extraBytesToWrite];
+
+ if (target >= targetEnd) {
+ result = targetExhausted; break;
+ };
+ if (ch <= kMaximumUCS2) {
+ *target++ = ch;
+ } else if (ch > kMaximumUTF16) {
+ *target++ = kReplacementCharacter;
+ } else {
+ if (target + 1 >= targetEnd) {
+ result = targetExhausted; break;
+ };
+ ch -= halfBase;
+ *target++ = (ch >> halfShift) + kSurrogateHighStart;
+ *target++ = (ch & halfMask) + kSurrogateLowStart;
+ };
+ };
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+};
+
+/* ================================================================ */
+ConversionResult ConvertUCS4toUTF8 (
+ UCS4** sourceStart, const UCS4* sourceEnd,
+ UTF8** targetStart, const UTF8* targetEnd)
+{
+ ConversionResult result = ok;
+ register UCS4* source = *sourceStart;
+ register UTF8* target = *targetStart;
+ while (source < sourceEnd) {
+ register UCS4 ch;
+ register unsigned short bytesToWrite = 0;
+ register const UCS4 byteMask = 0xBF;
+ register const UCS4 byteMark = 0x80;
+ ch = *source++;
+ if (ch >= kSurrogateHighStart && ch <= kSurrogateHighEnd
+ && source < sourceEnd) {
+ register UCS4 ch2 = *source;
+ if (ch2 >= kSurrogateLowStart && ch2 <= kSurrogateLowEnd) {
+ ch = ((ch - kSurrogateHighStart) << halfShift)
+ + (ch2 - kSurrogateLowStart) + halfBase;
+ ++source;
+ };
+ };
+ if (ch < 0x80) { bytesToWrite = 1;
+ } else if (ch < 0x800) { bytesToWrite = 2;
+ } else if (ch < 0x10000) { bytesToWrite = 3;
+ } else if (ch < 0x200000) { bytesToWrite = 4;
+ } else if (ch < 0x4000000) { bytesToWrite = 5;
+ } else if (ch <= kMaximumUCS4){ bytesToWrite = 6;
+ } else { bytesToWrite = 2;
+ ch = kReplacementCharacter;
+ }; /* I wish there were a smart way to avoid this conditional */
+
+ target += bytesToWrite;
+ if (target > targetEnd) {
+ target -= bytesToWrite; result = targetExhausted; break;
+ };
+ switch (bytesToWrite) { /* note: code falls through cases! */
+ case 6: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 5: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 4: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 3: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 2: *--target = (ch | byteMark) & byteMask; ch >>= 6;
+ case 1: *--target = ch | firstByteMark[bytesToWrite];
+ };
+ target += bytesToWrite;
+ };
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+};
+
+/* ================================================================ */
+
+ConversionResult ConvertUTF8toUCS4 (
+ UTF8** sourceStart, UTF8* sourceEnd,
+ UCS4** targetStart, const UCS4* targetEnd)
+{
+ ConversionResult result = ok;
+ register UTF8* source = *sourceStart;
+ register UCS4* target = *targetStart;
+ while (source < sourceEnd) {
+ register UCS4 ch = 0;
+ register unsigned short extraBytesToWrite = bytesFromUTF8[*source];
+ if (source + extraBytesToWrite > sourceEnd) {
+ result = sourceExhausted; break;
+ };
+ switch(extraBytesToWrite) { /* note: code falls through cases! */
+ case 5: ch += *source++; ch <<= 6;
+ case 4: ch += *source++; ch <<= 6;
+ case 3: ch += *source++; ch <<= 6;
+ case 2: ch += *source++; ch <<= 6;
+ case 1: ch += *source++; ch <<= 6;
+ case 0: ch += *source++;
+ };
+ ch -= offsetsFromUTF8[extraBytesToWrite];
+
+ if (target >= targetEnd) {
+ result = targetExhausted; break;
+ };
+ if (ch <= kMaximumUCS2) {
+ *target++ = ch;
+ } else if (ch > kMaximumUCS4) {
+ *target++ = kReplacementCharacter;
+ } else {
+ if (target + 1 >= targetEnd) {
+ result = targetExhausted; break;
+ };
+ ch -= halfBase;
+ *target++ = (ch >> halfShift) + kSurrogateHighStart;
+ *target++ = (ch & halfMask) + kSurrogateLowStart;
+ };
+ };
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+};
diff --git a/CVTUTF.H b/CVTUTF.H
new file mode 100644
index 0000000..85fd8ef
--- /dev/null
+++ b/CVTUTF.H
@@ -0,0 +1,106 @@
+/* ================================================================ */
+/*
+File: ConvertUTF.h
+Author: Mark E. Davis
+Copyright (C) 1994 Taligent, Inc. All rights reserved.
+
+This code is copyrighted. Under the copyright laws, this code may not
+be copied, in whole or part, without prior written consent of Taligent.
+
+Taligent grants the right to use or reprint this code as long as this
+ENTIRE copyright notice is reproduced in the code or reproduction.
+The code is provided AS-IS, AND TALIGENT DISCLAIMS ALL WARRANTIES,
+EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN
+NO EVENT WILL TALIGENT BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING,
+WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
+INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY
+LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CODE, EVEN
+IF TALIGENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
+LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE
+LIMITATION MAY NOT APPLY TO YOU.
+
+RESTRICTED RIGHTS LEGEND: Use, duplication, or disclosure by the
+government is subject to restrictions as set forth in subparagraph
+(c)(l)(ii) of the Rights in Technical Data and Computer Software
+clause at DFARS 252.227-7013 and FAR 52.227-19.
+
+This code may be protected by one or more U.S. and International
+Patents.
+
+TRADEMARKS: Taligent and the Taligent Design Mark are registered
+trademarks of Taligent, Inc.
+*/
+/* ================================================================ */
+
+#include <stdio.h>
+#include <stdlib.h>
+// #include <types.h>
+#include <string.h>
+
+/* ================================================================ */
+/* The following 4 definitions are compiler-specific.
+ I would use wchar_t for UCS2/UTF16, except that the C standard
+ does not guarantee that it has at least 16 bits, so wchar_t is
+ no less portable than unsigned short!
+*/
+
+typedef unsigned long UCS4;
+typedef unsigned short UCS2;
+typedef unsigned short UTF16;
+typedef unsigned char UTF8;
+
+typedef enum {false, true} Boolean;
+
+
+const UCS4 kReplacementCharacter = 0x0000FFFDUL;
+const UCS4 kMaximumUCS2 = 0x0000FFFFUL;
+const UCS4 kMaximumUTF16 = 0x0010FFFFUL;
+const UCS4 kMaximumUCS4 = 0x7FFFFFFFUL;
+
+/* ================================================================ */
+/* Each of these routines converts the text between *sourceStart and
+sourceEnd, putting the result into the buffer between *targetStart and
+targetEnd. Note: the end pointers are *after* the last item: e.g.
+*(sourceEnd - 1) is the last item.
+
+ The return result indicates whether the conversion was successful,
+and if not, whether the problem was in the source or target buffers.
+
+ After the conversion, *sourceStart and *targetStart are both
+updated to point to the end of last text successfully converted in
+the respective buffers.
+*/
+
+typedef enum {
+ ok, /* conversion successful */
+ sourceExhausted, /* partial character in source, but hit end */
+ targetExhausted /* insuff. room in target for conversion */
+} ConversionResult;
+
+ConversionResult ConvertUCS4toUTF16 (
+ UCS4** sourceStart, const UCS4* sourceEnd,
+ UTF16** targetStart, const UTF16* targetEnd);
+
+ConversionResult ConvertUTF16toUCS4 (
+ UTF16** sourceStart, UTF16* sourceEnd,
+ UCS4** targetStart, const UCS4* targetEnd);
+
+ConversionResult ConvertUTF16toUTF8 (
+ UTF16** sourceStart, const UTF16* sourceEnd,
+ UTF8** targetStart, const UTF8* targetEnd);
+
+ConversionResult ConvertUTF8toUTF16 (
+ UTF8** sourceStart, UTF8* sourceEnd,
+ UTF16** targetStart, const UTF16* targetEnd);
+
+ConversionResult ConvertUCS4toUTF8 (
+ UCS4** sourceStart, const UCS4* sourceEnd,
+ UTF8** targetStart, const UTF8* targetEnd);
+
+ConversionResult ConvertUTF8toUCS4 (
+ UTF8** sourceStart, UTF8* sourceEnd,
+ UCS4** targetStart, const UCS4* targetEnd);
+
+/* ================================================================ */
diff --git a/CVTUTF7.C b/CVTUTF7.C
new file mode 100644
index 0000000..09583cb
--- /dev/null
+++ b/CVTUTF7.C
@@ -0,0 +1,300 @@
+/* ================================================================ */
+/*
+File: ConvertUTF7.c
+Author: David B. Goldsmith
+Copyright (C) 1994, 1996 Taligent, Inc. All rights reserved.
+
+This code is copyrighted. Under the copyright laws, this code may not
+be copied, in whole or part, without prior written consent of Taligent.
+
+Taligent grants the right to use this code as long as this ENTIRE
+copyright notice is reproduced in the code. The code is provided
+AS-IS, AND TALIGENT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR
+IMPLIED, INCLUDING, BUT NOT LIMITED TO IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+WILL TALIGENT BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING,
+WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
+INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY
+LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CODE, EVEN
+IF TALIGENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
+LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE
+LIMITATION MAY NOT APPLY TO YOU.
+
+RESTRICTED RIGHTS LEGEND: Use, duplication, or disclosure by the
+government is subject to restrictions as set forth in subparagraph
+(c)(l)(ii) of the Rights in Technical Data and Computer Software
+clause at DFARS 252.227-7013 and FAR 52.227-19.
+
+This code may be protected by one or more U.S. and International
+Patents.
+
+TRADEMARKS: Taligent and the Taligent Design Mark are registered
+trademarks of Taligent, Inc.
+*/
+
+#include "CVTUTF7.H"
+
+static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+static short invbase64[128];
+
+static char direct[] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'(),-./:?";
+static char optional[] = "!\"#$%&*;<=>@[]^_`{|}";
+static char spaces[] = " \011\015\012"; /* space, tab, return, line feed */
+static char mustshiftsafe[128];
+static char mustshiftopt[128];
+
+static int needtables = 1;
+
+#define SHIFT_IN '+'
+#define SHIFT_OUT '-'
+
+static void
+tabinit()
+{
+ int i, limit;
+
+ for (i = 0; i < 128; ++i)
+ {
+ mustshiftopt[i] = mustshiftsafe[i] = 1;
+ invbase64[i] = -1;
+ }
+ limit = strlen(direct);
+ for (i = 0; i < limit; ++i)
+ mustshiftopt[direct[i]] = mustshiftsafe[direct[i]] = 0;
+ limit = strlen(spaces);
+ for (i = 0; i < limit; ++i)
+ mustshiftopt[spaces[i]] = mustshiftsafe[spaces[i]] = 0;
+ limit = strlen(optional);
+ for (i = 0; i < limit; ++i)
+ mustshiftopt[optional[i]] = 0;
+ limit = strlen(base64);
+ for (i = 0; i < limit; ++i)
+ invbase64[base64[i]] = i;
+
+ needtables = 0;
+}
+
+#define DECLARE_BIT_BUFFER register unsigned long BITbuffer = 0, buffertemp = 0; int bufferbits = 0
+#define BITS_IN_BUFFER bufferbits
+#define WRITE_N_BITS(x, n) ((BITbuffer |= ( ((x) & ~(-1L<<(n))) << (32-(n)-bufferbits) ) ), bufferbits += (n) )
+#define READ_N_BITS(n) ((buffertemp = (BITbuffer >> (32-(n)))), (BITbuffer <<= (n)), (bufferbits -= (n)), buffertemp)
+#define TARGETCHECK {if (target >= targetEnd) {result = targetExhausted; break;}}
+
+ConversionResult ConvertUCS2toUTF7(
+ UCS2** sourceStart, UCS2* sourceEnd,
+ char** targetStart, char* targetEnd,
+ int optional, int verbose)
+{
+ ConversionResult result = ok;
+ DECLARE_BIT_BUFFER;
+ int shifted = 0, needshift = 0, done = 0;
+ register UCS2 *source = *sourceStart;
+ register char *target = *targetStart;
+ char *mustshift;
+
+ if (needtables)
+ tabinit();
+
+ if (optional)
+ mustshift = mustshiftopt;
+ else
+ mustshift = mustshiftsafe;
+
+ do
+ {
+ register UCS2 r;
+
+ if (!(done = (source >= sourceEnd)))
+ r = *source++;
+ needshift = (!done && ((r > 0x7f) || mustshift[r]));
+
+ if (needshift && !shifted)
+ {
+ TARGETCHECK;
+ *target++ = SHIFT_IN;
+ /* Special case handling of the SHIFT_IN character */
+ if (r == (UCS2)SHIFT_IN) {
+ TARGETCHECK;
+ *target++ = SHIFT_OUT;
+ }
+ else
+ shifted = 1;
+ }
+
+ if (shifted)
+ {
+ /* Either write the character to the bit buffer, or pad
+ the bit buffer out to a full base64 character.
+ */
+ if (needshift)
+ WRITE_N_BITS(r, 16);
+ else
+ WRITE_N_BITS(0, (6 - (BITS_IN_BUFFER % 6))%6);
+
+ /* Flush out as many full base64 characters as possible
+ from the bit buffer.
+ */
+ while ((target < targetEnd) && BITS_IN_BUFFER >= 6)
+ {
+ *target++ = base64[READ_N_BITS(6)];
+ }
+
+ if (BITS_IN_BUFFER >= 6)
+ TARGETCHECK;
+
+ if (!needshift)
+ {
+ /* Write the explicit shift out character if
+ 1) The caller has requested we always do it, or
+ 2) The directly encoded character is in the
+ base64 set, or
+ 3) The directly encoded character is SHIFT_OUT.
+ */
+ if (verbose || ((!done) && (invbase64[r] >=0 || r == SHIFT_OUT)))
+ {
+ TARGETCHECK;
+ *target++ = SHIFT_OUT;
+ }
+ shifted = 0;
+ }
+ }
+
+ /* The character can be directly encoded as ASCII. */
+ if (!needshift && !done)
+ {
+ TARGETCHECK;
+ *target++ = (char) r;
+ }
+
+ }
+ while (!done);
+
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+}
+
+ConversionResult ConvertUTF7toUCS2(
+ char** sourceStart, char* sourceEnd,
+ UCS2** targetStart, UCS2* targetEnd)
+{
+ ConversionResult result = ok;
+ DECLARE_BIT_BUFFER;
+ int shifted = 0, first = 0, wroteone = 0, base64EOF, base64value, done;
+ unsigned int c, prevc;
+ unsigned long junk;
+ register char *source = *sourceStart;
+ register UCS2 *target = *targetStart;
+
+ if (needtables)
+ tabinit();
+
+ do
+ {
+ /* read an ASCII character c */
+ if (!(done = (source >= sourceEnd)))
+ c = *source++;
+ if (shifted)
+ {
+ /* We're done with a base64 string if we hit EOF, it's not a valid
+ ASCII character, or it's not in the base64 set.
+ */
+ base64EOF = done || (c > 0x7f) || (base64value = invbase64[c]) < 0;
+ if (base64EOF)
+ {
+ shifted = 0;
+ /* If the character causing us to drop out was SHIFT_IN or
+ SHIFT_OUT, it may be a special escape for SHIFT_IN. The
+ test for SHIFT_IN is not necessary, but allows an alternate
+ form of UTF-7 where SHIFT_IN is escaped by SHIFT_IN. This
+ only works for some values of SHIFT_IN.
+ */
+ if (!done && (c == SHIFT_IN || c == SHIFT_OUT))
+ {
+ /* get another character c */
+ prevc = c;
+ if (!(done = (source >= sourceEnd)))
+ c = *source++;
+ /* If no base64 characters were encountered, and the
+ character terminating the shift sequence was
+ SHIFT_OUT, then it's a special escape for SHIFT_IN.
+ */
+ if (first && prevc == SHIFT_OUT)
+ {
+ /* write SHIFT_IN unicode */
+ TARGETCHECK;
+ *target++ = (UCS2)SHIFT_IN;
+ }
+ else if (!wroteone)
+ {
+ result = sourceCorrupt;
+ /* fprintf(stderr, "UTF7: empty sequence near byte %ld in input\n", source-sourceStart) */;
+ }
+ }
+ else if (!wroteone)
+ {
+ result = sourceCorrupt;
+ /* fprintf(stderr, "UTF7: empty sequence near byte %ld in input\n", source-sourceStart) */;
+ }
+ }
+ else
+ {
+ /* Add another 6 bits of base64 to the bit buffer. */
+ WRITE_N_BITS(base64value, 6);
+ first = 0;
+ }
+
+ /* Extract as many full 16 bit characters as possible from the
+ bit buffer.
+ */
+ while (BITS_IN_BUFFER >= 16 && (target < targetEnd))
+ {
+ /* write a unicode */
+ *target++ = READ_N_BITS(16);
+ wroteone = 1;
+ }
+
+ if (BITS_IN_BUFFER >= 16)
+ TARGETCHECK;
+
+ if (base64EOF)
+ {
+ junk = READ_N_BITS(BITS_IN_BUFFER);
+ if (junk)
+ {
+ result = sourceCorrupt;
+ /* fprintf(stderr, "UTF7: non-zero pad bits near byte %ld in input\n", source-sourceStart) */;
+ }
+ }
+ }
+
+ if (!shifted && !done)
+ {
+ if (c == SHIFT_IN)
+ {
+ shifted = 1;
+ first = 1;
+ wroteone = 0;
+ }
+ else
+ {
+ /* It must be a directly encoded character. */
+ if (c > 0x7f)
+ {
+ result = sourceCorrupt;
+ /* fprintf(stderr, "UTF7: non-ASCII character near byte %ld in input\n", source-sourceStart) */;
+ }
+ /* write a unicode */
+ TARGETCHECK;
+ *target++ = c;
+ }
+ }
+ }
+ while (!done);
+
+ *sourceStart = source;
+ *targetStart = target;
+ return result;
+}
diff --git a/CVTUTF7.H b/CVTUTF7.H
new file mode 100644
index 0000000..788e0d1
--- /dev/null
+++ b/CVTUTF7.H
@@ -0,0 +1,80 @@
+/* ================================================================ */
+/*
+File: ConvertUTF7.h
+Author: David B. Goldsmith
+Copyright (C) 1994 Taligent, Inc. All rights reserved.
+
+This code is copyrighted. Under the copyright laws, this code may not
+be copied, in whole or part, without prior written consent of Taligent.
+
+Taligent grants the right to use this code as long as this ENTIRE
+copyright notice is reproduced in the code. The code is provided
+AS-IS, AND TALIGENT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR
+IMPLIED, INCLUDING, BUT NOT LIMITED TO IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
+WILL TALIGENT BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING,
+WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
+INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY
+LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CODE, EVEN
+IF TALIGENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF
+LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE
+LIMITATION MAY NOT APPLY TO YOU.
+
+RESTRICTED RIGHTS LEGEND: Use, duplication, or disclosure by the
+government is subject to restrictions as set forth in subparagraph
+(c)(l)(ii) of the Rights in Technical Data and Computer Software
+clause at DFARS 252.227-7013 and FAR 52.227-19.
+
+This code may be protected by one or more U.S. and International
+Patents.
+
+TRADEMARKS: Taligent and the Taligent Design Mark are registered
+trademarks of Taligent, Inc.
+*/
+/* ================================================================ */
+
+/* ================================================================ */
+/* The following definitions are compiler-specific.
+ I would use wchar_t for UCS2/UTF16, except that the C standard
+ does not guarantee that it has at least 16 bits, so wchar_t is
+ no more portable than unsigned short!
+*/
+
+typedef unsigned short UCS2;
+
+/* ================================================================ */
+/* Each of these routines converts the text between *sourceStart and
+sourceEnd, putting the result into the buffer between *targetStart and
+targetEnd. Note: the end pointers are *after* the last item: e.g.
+*(sourceEnd - 1) is the last item.
+
+ The return result indicates whether the conversion was successful,
+and if not, whether the problem was in the source or target buffers.
+
+ After the conversion, *sourceStart and *targetStart are both
+updated to point to the end of last text successfully converted in
+the respective buffers.
+
+ In ConvertUCS2toUTF7, optional indicates whether UTF-7 optional
+characters should be directly encoded, and verbose controls whether the
+shift-out character, "-", is always emitted at the end of a shifted
+sequence.
+*/
+
+typedef enum {
+ ok, /* conversion successful */
+ sourceCorrupt, /* source contains invalid UTF-7 */
+ targetExhausted /* insuff. room in target for conversion */
+} ConversionResult;
+
+extern ConversionResult ConvertUCS2toUTF7 (
+ UCS2** sourceStart, UCS2* sourceEnd,
+ char** targetStart, char* targetEnd,
+ int optional, int verbose);
+
+extern ConversionResult ConvertUTF7toUCS2 (
+ char** sourceStart, char* sourceEnd,
+ UCS2** targetStart, UCS2* targetEnd);
+
+/* ================================================================ */