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e368dc9c85
This patch was generated by a script. Here's the source of the script for
future reference:
function convert() {
echo "Converting $1 to $2..."
find . ! -wholename "*nsprpub*" \
! -wholename "*security/nss*" \
! -wholename "*/.hg*" \
! -wholename "obj-ff-dbg*" \
! -name nsXPCOMCID.h \
! -name prtypes.h \
-type f \
\( -iname "*.cpp" \
-o -iname "*.h" \
-o -iname "*.c" \
-o -iname "*.cc" \
-o -iname "*.idl" \
-o -iname "*.ipdl" \
-o -iname "*.ipdlh" \
-o -iname "*.mm" \) | \
xargs -n 1 sed -i -e "s/\b$1\b/$2/g"
}
convert PRInt8 int8_t
convert PRUint8 uint8_t
convert PRInt16 int16_t
convert PRUint16 uint16_t
convert PRInt32 int32_t
convert PRUint32 uint32_t
convert PRInt64 int64_t
convert PRUint64 uint64_t
convert PRIntn int
convert PRUintn unsigned
convert PRSize size_t
convert PROffset32 int32_t
convert PROffset64 int64_t
convert PRPtrdiff ptrdiff_t
convert PRFloat64 double
459 lines
16 KiB
C++
459 lines
16 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:expandtab:shiftwidth=2:tabstop=2:
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*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsUnicodeToTSCII.h"
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#include "nsMemory.h"
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#include "tamil.h"
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/*
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* TSCII is an 8-bit encoding consisting of:
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* 0x00..0x7F: ASCII
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* 0x80..0x90, 0x95..0x9F, 0xAB..0xFE:
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* Tamil letters and glyphs
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* 0xA1..0xA5, 0xAA: Tamil combining letters (after the base character)
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* 0xA6..0xA8: Tamil combining letters (before the base character)
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* 0x91..0x94: Punctuation
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* 0xA9: Symbols
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*/
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//----------------------------------------------------------------------
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// Class nsUnicodeToTSCII [implementation]
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NS_IMPL_ISUPPORTS1(nsUnicodeToTSCII, nsIUnicodeEncoder)
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/*
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* During UCS-4 to TSCII conversion, mState contains
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* the last byte (or sometimes the last two bytes) to be output.
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* This can be:
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* 0x00 Nothing pending.
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* 0xB8..0xC9, 0x83..0x86 A consonant.
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* 0xEC, 0x8A A consonant with VIRAMA sign (final or joining).
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* 0x87, 0xC38A Two consonants combined through a VIRAMA sign.
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*/
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static const uint8_t UnicharToTSCII[] =
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{
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0, 0, 0, 0xb7, 0, 0xab, 0xac, 0xfe, // 0x0B80..0x0B87
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0xae, 0xaf, 0xb0, 0, 0, 0, 0xb1, 0xb2, // 0x0B88..0x0B8F
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0xb3, 0, 0xb4, 0xb5, 0xb6, 0xb8, 0, 0, // 0x0B90..0x0B97
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0, 0xb9, 0xba, 0, 0x83, 0, 0xbb, 0xbc, // 0x0B98..0x0B9F
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0, 0, 0, 0xbd, 0xbe, 0, 0, 0, // 0x0BA0..0x0BA7
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0xbf, 0xc9, 0xc0, 0, 0, 0, 0xc1, 0xc2, // 0x0BA8..0x0BAF
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0xc3, 0xc8, 0xc4, 0xc7, 0xc6, 0xc5, 0, 0x84, // 0x0BB0..0x0BB7
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0x85, 0x86, 0, 0, 0, 0, 0xa1, 0xa2, // 0x0BB8..0x0BBF
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0xa3, 0xa4, 0xa5, 0, 0, 0, 0xa6, 0xa7, // 0x0BC0..0x0BC7
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0xa8, 0, 0, 0, 0, 0, 0, 0, // 0x0BC8..0x0BCF
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0, 0, 0, 0, 0, 0, 0, 0xaa, // 0x0BD0..0x0BD7
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0, 0, 0, 0, 0, 0, 0, 0, // 0x0BD8..0x0BDF
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0, 0, 0, 0, 0, 0, 0x80, 0x81, // 0x0BE0..0x0BE7
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0x8d, 0x8e, 0x8f, 0x90, 0x95, 0x96, 0x97, 0x98, // 0x0BE8..0x0BEF
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0x9d, 0x9e, 0x9f, 0, 0, 0, 0, 0, // 0x0BF0..0x0BF7
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0, 0, 0, 0, 0, 0, 0, 0 // 0x0BF8..0x0BFF
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};
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static const uint8_t consonant_with_u[] =
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{
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0xcc, 0x99, 0xcd, 0x9a, 0xce, 0xcf, 0xd0, 0xd1, 0xd2,
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0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb
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};
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static const uint8_t consonant_with_uu[] =
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{
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0xdc, 0x9b, 0xdd, 0x9c, 0xde, 0xdf, 0xe0, 0xe1, 0xe2,
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0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb
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};
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static const uint8_t consonant_with_virama[18] =
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{
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0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4,
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0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd
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};
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// Modified implementation of Unicode to TSCII converter in glibc by
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// Bruno Haible. My modifications are based on Unicode 3.0 chap. 9 and
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// the code chart for Tamil.
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NS_IMETHODIMP
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nsUnicodeToTSCII::Convert(const PRUnichar * aSrc, int32_t * aSrcLength,
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char * aDest, int32_t * aDestLength)
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{
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const PRUnichar * src = aSrc;
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const PRUnichar * srcEnd = aSrc + *aSrcLength;
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char * dest = aDest;
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char * destEnd = dest + *aDestLength;
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nsresult rv = NS_OK;
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while (src < srcEnd && dest < destEnd) {
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PRUnichar ch = *src;
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if (mBuffer) {
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// Attempt to combine the last character with this one.
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uint32_t last = mBuffer;
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// last : consonant
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if (IS_TSC_CONSONANT(last)) {
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if (ch == UNI_VOWELSIGN_U && IS_TSC_CONSONANT1(last)) {
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*dest++ = consonant_with_u[last - TSC_KA];
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mBuffer = 0;
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++src;
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continue;
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}
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if (ch == UNI_VOWELSIGN_UU && IS_TSC_CONSONANT1(last)) {
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*dest++ = consonant_with_uu[last - TSC_KA];
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mBuffer = 0;
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++src;
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continue;
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}
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// reorder. vowel sign goes to the left of consonant
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if (IS_UNI_LEFT_VOWELSIGN(ch)) {
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if (dest + 2 > destEnd)
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goto error_more_output;
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*dest++ = TSC_LEFT_VOWELSIGN(ch);
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*dest++ = last;
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mBuffer = 0;
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++src;
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continue;
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}
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// split and reorder. consonant goes bet. two parts
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if (IS_UNI_2PARTS_VOWELSIGN(ch)) {
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if (dest + 3 > destEnd)
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goto error_more_output;
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*dest++ = TSC_LEFT_VOWEL_PART(ch);
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*dest++ = last;
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*dest++ = TSC_RIGHT_VOWEL_PART(ch);
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mBuffer = 0;
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++src;
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continue;
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}
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// Virama
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if (ch == UNI_VIRAMA) {
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// consonant KA can form a conjunct with consonant SSA(SHA).
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// buffer dead consonant 'K' for the now.
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if (last == TSC_KA) {
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mBuffer = TSC_KA_DEAD;
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}
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// SA can form a conjunct when followed by 'RA'.
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// buffer dead consonant 'S' for the now.
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else if (last == TSC_SA) {
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mBuffer = TSC_SA_DEAD;
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}
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else {
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*dest++ = IS_TSC_CONSONANT1(last) ?
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consonant_with_virama[last - TSC_KA] : last + 5;
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mBuffer = 0;
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}
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++src;
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continue;
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}
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// consonant TA forms a ligature with vowel 'I' or 'II'.
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if (last == TSC_TA && (ch == UNI_VOWELSIGN_I || ch == UNI_VOWELSIGN_II)) {
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*dest++ = ch - (UNI_VOWELSIGN_I - TSC_TI_LIGA);
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mBuffer = 0;
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++src;
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continue;
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}
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}
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else if (last == TSC_KA_DEAD) {
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// Kd + SSA = K.SSA
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if (ch == UNI_SSA) {
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mBuffer = TSC_KSSA;
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++src;
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continue;
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}
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}
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else if (last == TSC_SA_DEAD) {
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// Sd + RA = S.RA. Buffer RA + Sd.
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if (ch == UNI_RA) {
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mBuffer = 0xc38a;
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++src;
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continue;
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}
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}
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else if (last == TSC_KSSA) {
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if (ch == UNI_VIRAMA) {
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*dest++ = (char) TSC_KSSA_DEAD;
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mBuffer = 0;
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++src;
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continue;
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}
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// vowel splitting/reordering should be done around conjuncts as well.
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// reorder. vowel sign goes to the left of consonant
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if (IS_UNI_LEFT_VOWELSIGN(ch)) {
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if (dest + 2 > destEnd)
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goto error_more_output;
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*dest++ = TSC_LEFT_VOWELSIGN(ch);
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*dest++ = last;
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mBuffer = 0;
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++src;
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continue;
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}
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// split and reorder. consonant goes bet. two parts
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if (IS_UNI_2PARTS_VOWELSIGN(ch)) {
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if (dest + 3 > destEnd)
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goto error_more_output;
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*dest++ = TSC_LEFT_VOWEL_PART(ch);
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*dest++ = last;
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*dest++ = TSC_RIGHT_VOWEL_PART(ch);
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mBuffer = 0;
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++src;
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continue;
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}
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}
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else {
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NS_ASSERTION(last == 0xc38a, "No other value can be buffered");
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if (ch == UNI_VOWELSIGN_II) {
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*dest++ = (char) TSC_SRII_LIGA;
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mBuffer = 0;
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++src;
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continue;
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}
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else {
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// put back TSC_SA_DEAD and TSC_RA
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*dest++ = (char) TSC_SA_DEAD;
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mBuffer = TSC_RA;
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++src;
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continue;
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}
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}
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/* Output the buffered character. */
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if (last >> 8) {
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if (dest + 2 > destEnd)
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goto error_more_output;
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*dest++ = last & 0xff;
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*dest++ = (last >> 8) & 0xff;
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}
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else
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*dest++ = last & 0xff;
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mBuffer = 0;
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continue;
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}
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if (ch < 0x80) // Plain ASCII character.
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*dest++ = (char)ch;
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else if (IS_UNI_TAMIL(ch)) {
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uint8_t t = UnicharToTSCII[ch - UNI_TAMIL_START];
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if (t != 0) {
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if (IS_TSC_CONSONANT(t))
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mBuffer = (uint32_t) t;
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else
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*dest++ = t;
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}
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else if (IS_UNI_2PARTS_VOWELSIGN(ch)) {
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// actually this is an illegal sequence.
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if (dest + 2 > destEnd)
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goto error_more_output;
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*dest++ = TSC_LEFT_VOWEL_PART(ch);
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*dest++ = TSC_RIGHT_VOWEL_PART(ch);
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}
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else {
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*aDestLength = dest - aDest;
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return NS_ERROR_UENC_NOMAPPING;
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}
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}
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else if (ch == 0x00A9)
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*dest++ = (char)ch;
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else if (IS_UNI_SINGLE_QUOTE(ch))
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*dest++ = ch - UNI_LEFT_SINGLE_QUOTE + TSC_LEFT_SINGLE_QUOTE;
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else if (IS_UNI_DOUBLE_QUOTE(ch))
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*dest++ = ch - UNI_LEFT_DOUBLE_QUOTE + TSC_LEFT_DOUBLE_QUOTE;
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else {
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*aDestLength = dest - aDest;
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return NS_ERROR_UENC_NOMAPPING;
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}
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/* Now that we wrote the output increment the input pointer. */
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++src;
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}
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// flush the buffer
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if (mBuffer >> 8) {
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// Write out the last character, two bytes.
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if (dest + 2 > destEnd)
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goto error_more_output;
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*dest++ = (mBuffer >> 8) & 0xff;
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*dest++ = mBuffer & 0xff;
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mBuffer = 0;
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}
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else if (mBuffer) {
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// Write out the last character, a single byte.
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if (dest >= destEnd)
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goto error_more_output;
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*dest++ = mBuffer & 0xff;
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mBuffer = 0;
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}
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*aSrcLength = src - aSrc;
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*aDestLength = dest - aDest;
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return rv;
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error_more_output:
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*aSrcLength = src - aSrc;
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*aDestLength = dest - aDest;
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return NS_OK_UENC_MOREOUTPUT;
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}
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NS_IMETHODIMP
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nsUnicodeToTSCII::Finish(char* aDest, int32_t* aDestLength)
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{
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if (!mBuffer) {
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*aDestLength = 0;
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return NS_OK;
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}
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if (mBuffer >> 8) {
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// Write out the last character, two bytes.
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if (*aDestLength < 2) {
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*aDestLength = 0;
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return NS_OK_UENC_MOREOUTPUT;
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}
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*aDest++ = (mBuffer >> 8) & 0xff;
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*aDest++ = mBuffer & 0xff;
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mBuffer = 0;
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*aDestLength = 2;
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}
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else {
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// Write out the last character, a single byte.
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if (*aDestLength < 1) {
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*aDestLength = 0;
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return NS_OK_UENC_MOREOUTPUT;
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}
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*aDest++ = mBuffer & 0xff;
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mBuffer = 0;
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*aDestLength = 1;
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}
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return NS_OK;
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}
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//================================================================
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NS_IMETHODIMP
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nsUnicodeToTSCII::Reset()
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{
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mBuffer = 0;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsUnicodeToTSCII::GetMaxLength(const PRUnichar * aSrc, int32_t aSrcLength,
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int32_t * aDestLength)
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{
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// Some Tamil letters can be decomposed into 2 glyphs in TSCII.
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*aDestLength = aSrcLength * 2;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsUnicodeToTSCII::SetOutputErrorBehavior(int32_t aBehavior,
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nsIUnicharEncoder *aEncoder,
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PRUnichar aChar)
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{
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return NS_OK;
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}
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// same as the mapping of the C1(0x80-0x9f) part of Windows-1252 to Unicode
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const static PRUnichar gTSCIIToTTF[] = {
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0x20AC, 0x0081, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021,
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0x02C6, 0x2030, 0x0160, 0x2039, 0x0152, 0x008D, 0x017D, 0x008F,
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0x0090, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014,
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0x02DC, 0x2122, 0x0161, 0x203A, 0x0153, 0x009D, 0x017E, 0x0178
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};
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//----------------------------------------------------------------------
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// Class nsUnicodeToTamilTTF [implementation]
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//
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NS_IMPL_ISUPPORTS_INHERITED0(nsUnicodeToTamilTTF, nsUnicodeToTSCII)
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NS_IMETHODIMP
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nsUnicodeToTamilTTF::Convert(const PRUnichar * aSrc,
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int32_t * aSrcLength, char * aDest,
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int32_t * aDestLength)
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{
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int32_t medLen, destLen;
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char *med;
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GetMaxLength(aSrc, *aSrcLength, &destLen);
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NS_ASSERTION(destLen <= *aDestLength, "insufficient dest. buffer size");
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// TSCII converter is a single byte encoder and takes half the space
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// taken by TamilTTF encoder.
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medLen = destLen / 2;
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if (medLen > CHAR_BUFFER_SIZE) {
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med = (char *) nsMemory::Alloc(medLen);
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if (!med)
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return NS_ERROR_OUT_OF_MEMORY;
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}
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else
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med = mStaticBuffer;
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nsresult rv = nsUnicodeToTSCII::Convert(aSrc, aSrcLength, med, &medLen);
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if (NS_FAILED(rv)) {
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if (med != mStaticBuffer)
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nsMemory::Free(med);
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return rv;
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}
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int32_t i, j;
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// widen 8bit TSCII to pseudo-Unicode font encoding of TSCII-Tamil font
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for (i = 0, j = 0; i < medLen; i++) {
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// Only C1 part(0x80-0x9f) needs to be mapped as if they're CP1251.
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PRUnichar ucs2 = (med[i] & 0xe0) == 0x80 ?
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gTSCIIToTTF[med[i] & 0x7f] : uint8_t(med[i]);
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// A lot of TSCII fonts are still based on TSCII 1.6 so that
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// they have Tamil vowel 'I' at 0xad instead of 0xfe.
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if (ucs2 == 0xfe) ucs2 = 0xad;
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aDest[j++] = uint8_t((ucs2 & 0xff00) >> 8);
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aDest[j++] = uint8_t(ucs2 & 0x00ff);
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}
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*aDestLength = j;
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if (med != mStaticBuffer)
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nsMemory::Free(med);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsUnicodeToTamilTTF::GetMaxLength(const PRUnichar * aSrc, int32_t aSrcLength, int32_t * aDestLength)
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{
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// Each Tamil character can generate at most two presentation forms,
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// but we're 'extending' them to 16bit shorts, which accounts for
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// additional factor of 2.
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*aDestLength = (aSrcLength + 1) * 4;
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsUnicodeToTamilTTF::SetOutputErrorBehavior(int32_t aBehavior,
|
|
nsIUnicharEncoder *aEncoder,
|
|
PRUnichar aChar)
|
|
{
|
|
if (aBehavior == kOnError_CallBack && aEncoder == nullptr)
|
|
return NS_ERROR_NULL_POINTER;
|
|
mErrEncoder = aEncoder;
|
|
mErrBehavior = aBehavior;
|
|
mErrChar = aChar;
|
|
return NS_OK;
|
|
}
|
|
|