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lou_translateString.c
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lou_translateString.c
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/* liblouis Braille Translation and Back-Translation Library
Based on the Linux screenreader BRLTTY, copyright (C) 1999-2006 by The
BRLTTY Team
Copyright (C) 2004, 2005, 2006 ViewPlus Technologies, Inc. www.viewplus.com
Copyright (C) 2004, 2005, 2006 JJB Software, Inc. www.jjb-software.com
Copyright (C) 2016 Mike Gray, American Printing House for the Blind
Copyright (C) 2016 Davy Kager, Dedicon
This file is part of liblouis.
liblouis is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 2.1 of the License, or
(at your option) any later version.
liblouis 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with liblouis. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file
* @brief Translate to braille
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "louis.h"
/*additional bits in typebuf*/
#define CAPSEMPH 0x8000
#define EMPHASIS 0x3fff // all typeform bits that can be used
/* bits for wordBuffer */
#define WORD_CHAR 0x00000001
#define WORD_RESET 0x00000002
#define WORD_STOP 0x00000004
#define WORD_WHOLE 0x00000008
#define LAST_WORD_AFTER 0x01000000
/* bits for emphasisBuffer */
#define CAPS_BEGIN 0x00000010
#define CAPS_END 0x00000020
#define CAPS_WORD 0x00000040
#define CAPS_SYMBOL 0x00000080
#define CAPS_EMPHASIS 0x000000f0
#define EMPHASIS_BEGIN 0x00000100
#define EMPHASIS_END 0x00000200
#define EMPHASIS_WORD 0x00000400
#define EMPHASIS_SYMBOL 0x00000800
#define EMPHASIS_MASK 0x00000f00
#define COMPBRL_BEGIN 0x10000000
#define COMPBRL_END 0x20000000
/* bits for transNoteBuffer */
#define TRANSNOTE_BEGIN 0x00000001
#define TRANSNOTE_END 0x00000002
#define TRANSNOTE_WORD 0x00000004
#define TRANSNOTE_SYMBOL 0x00000008
#define TRANSNOTE_MASK 0x0000000f
static const TranslationTableHeader *table;
static int src, srcmax;
static int dest, destmax;
static int mode;
static int currentPass = 1;
static const widechar *currentInput;
static widechar *passbuf1 = NULL;
static widechar *passbuf2 = NULL;
static widechar *currentOutput;
static int *prevSrcMapping = NULL;
static int *srcMapping = NULL;
static formtype *typebuf = NULL;
static unsigned int *wordBuffer = NULL;
static unsigned int *emphasisBuffer = NULL;
static unsigned int *transNoteBuffer = NULL;
static unsigned char *srcSpacing = NULL;
static unsigned char *destSpacing = NULL;
static int haveEmphasis = 0;
static TranslationTableOpcode transOpcode;
static TranslationTableOpcode prevTransOpcode;
static const TranslationTableRule *transRule;
static int transCharslen;
static int checkAttr (const widechar c,
const TranslationTableCharacterAttributes a, int nm);
static int putCharacter (widechar c);
static int makeCorrections ();
static int passDoTest ();
static int passDoAction ();
static int passVariables[NUMVAR];
static int passCharDots;
static int passSrc;
static widechar const *passInstructions;
static int passIC; /*Instruction counter */
static int startMatch;
static int endMatch;
static int startReplace;
static int endReplace;
static int realInlen;
static int srcIncremented;
static int *outputPositions;
static int *inputPositions;
static int cursorPosition;
static int cursorStatus;
static const TranslationTableRule **appliedRules;
static int maxAppliedRules;
static int appliedRulesCount;
static TranslationTableCharacter *
findCharOrDots (widechar c, int m)
{
/*Look up character or dot pattern in the appropriate
* table. */
static TranslationTableCharacter noChar =
{ 0, 0, 0, CTC_Space, 32, 32, 32 };
static TranslationTableCharacter noDots =
{ 0, 0, 0, CTC_Space, B16, B16, B16 };
TranslationTableCharacter *notFound;
TranslationTableCharacter *character;
TranslationTableOffset bucket;
unsigned long int makeHash = (unsigned long int) c % HASHNUM;
if (m == 0)
{
bucket = table->characters[makeHash];
notFound = &noChar;
}
else
{
bucket = table->dots[makeHash];
notFound = &noDots;
}
while (bucket)
{
character = (TranslationTableCharacter *) & table->ruleArea[bucket];
if (character->realchar == c)
return character;
bucket = character->next;
}
notFound->realchar = notFound->uppercase = notFound->lowercase = c;
return notFound;
}
static int
checkAttr (const widechar c, const TranslationTableCharacterAttributes
a, int m)
{
static widechar prevc = 0;
static TranslationTableCharacterAttributes preva = 0;
if (c != prevc)
{
preva = (findCharOrDots (c, m))->attributes;
prevc = c;
}
return ((preva & a) ? 1 : 0);
}
static int
checkAttr_safe (const widechar *currentInput, int src,
const TranslationTableCharacterAttributes a, int m)
{
return ((src < srcmax) ? checkAttr(currentInput[src], a, m) : 0);
}
static int
findAttribOrSwapRules ()
{
int save_transCharslen = transCharslen;
const TranslationTableRule *save_transRule = transRule;
TranslationTableOpcode save_transOpcode = transOpcode;
TranslationTableOffset ruleOffset;
ruleOffset = table->attribOrSwapRules[currentPass];
transCharslen = 0;
while (ruleOffset)
{
transRule = (TranslationTableRule *) & table->ruleArea[ruleOffset];
transOpcode = transRule->opcode;
if (passDoTest ())
return 1;
ruleOffset = transRule->charsnext;
}
transCharslen = save_transCharslen;
transRule = save_transRule;
transOpcode = save_transOpcode;
return 0;
}
static int
compareChars (const widechar * address1, const widechar * address2, int
count, int m)
{
int k;
if (!count)
return 0;
for (k = 0; k < count; k++)
if ((findCharOrDots (address1[k], m))->lowercase !=
(findCharOrDots (address2[k], m))->lowercase)
return 0;
return 1;
}
static int
makeCorrections ()
{
if (!table->corrections)
return 1;
src = 0;
dest = 0;
srcIncremented = 1;
memset (passVariables, 0, sizeof(int) * NUMVAR);
while (src < srcmax)
{
int length = srcmax - src;
const TranslationTableCharacter *character = findCharOrDots
(currentInput[src], 0);
const TranslationTableCharacter *character2;
int tryThis = 0;
if (!findAttribOrSwapRules ())
while (tryThis < 3)
{
TranslationTableOffset ruleOffset = 0;
unsigned long int makeHash = 0;
switch (tryThis)
{
case 0:
if (!(length >= 2))
break;
makeHash = (unsigned long int) character->lowercase << 8;
character2 = findCharOrDots (currentInput[src + 1], 0);
makeHash += (unsigned long int) character2->lowercase;
makeHash %= HASHNUM;
ruleOffset = table->forRules[makeHash];
break;
case 1:
if (!(length >= 1))
break;
length = 1;
ruleOffset = character->otherRules;
break;
case 2: /*No rule found */
transOpcode = CTO_Always;
ruleOffset = 0;
break;
}
while (ruleOffset)
{
transRule =
(TranslationTableRule *) & table->ruleArea[ruleOffset];
transOpcode = transRule->opcode;
transCharslen = transRule->charslen;
if (tryThis == 1 || (transCharslen <= length &&
compareChars (&transRule->
charsdots[0],
¤tInput[src],
transCharslen, 0)))
{
if (srcIncremented && transOpcode == CTO_Correct &&
passDoTest ())
{
tryThis = 4;
break;
}
}
ruleOffset = transRule->charsnext;
}
tryThis++;
}
srcIncremented = 1;
switch (transOpcode)
{
case CTO_Always:
if (dest >= destmax)
goto failure;
srcMapping[dest] = prevSrcMapping[src];
currentOutput[dest++] = currentInput[src++];
break;
case CTO_Correct:
if (appliedRules != NULL && appliedRulesCount < maxAppliedRules)
appliedRules[appliedRulesCount++] = transRule;
if (!passDoAction ())
goto failure;
if (endReplace == src)
srcIncremented = 0;
src = endReplace;
break;
default:
break;
}
}
{ // We have to transform typebuf accordingly
int pos;
formtype *typebuf_temp;
if ((typebuf_temp = malloc (dest * sizeof (formtype))) == NULL)
outOfMemory ();
for (pos = 0; pos < dest; pos++)
typebuf_temp[pos] = typebuf[srcMapping[pos]];
memcpy (typebuf, typebuf_temp, dest * sizeof (formtype));
free (typebuf_temp);
}
failure:
realInlen = src;
return 1;
}
static int
matchCurrentInput ()
{
int k;
int kk = passSrc;
for (k = passIC + 2; k < passIC + 2 + passInstructions[passIC + 1]; k++)
if (currentInput[kk] == ENDSEGMENT || passInstructions[k] !=
currentInput[kk++])
return 0;
return 1;
}
static int
swapTest (int swapIC, int *callSrc)
{
int curLen;
int curTest;
int curSrc = *callSrc;
TranslationTableOffset swapRuleOffset;
TranslationTableRule *swapRule;
swapRuleOffset =
(passInstructions[swapIC + 1] << 16) | passInstructions[swapIC + 2];
swapRule = (TranslationTableRule *) & table->ruleArea[swapRuleOffset];
for (curLen = 0; curLen < passInstructions[swapIC + 3]; curLen++)
{
if (swapRule->opcode == CTO_SwapDd)
{
for (curTest = 1; curTest < swapRule->charslen; curTest += 2)
{
if (currentInput[curSrc] == swapRule->charsdots[curTest])
break;
}
}
else
{
for (curTest = 0; curTest < swapRule->charslen; curTest++)
{
if (currentInput[curSrc] == swapRule->charsdots[curTest])
break;
}
}
if (curTest >= swapRule->charslen)
return 0;
curSrc++;
}
if (passInstructions[swapIC + 3] == passInstructions[swapIC + 4])
{
*callSrc = curSrc;
return 1;
}
while (curLen < passInstructions[swapIC + 4])
{
if (swapRule->opcode == CTO_SwapDd)
{
for (curTest = 1; curTest < swapRule->charslen; curTest += 2)
{
if (currentInput[curSrc] == swapRule->charsdots[curTest])
break;
}
}
else
{
for (curTest = 0; curTest < swapRule->charslen; curTest++)
{
if (currentInput[curSrc] == swapRule->charsdots[curTest])
break;
}
}
if (curTest >= swapRule->charslen)
{
*callSrc = curSrc;
return 1;
}
curSrc++;
curLen++;
}
*callSrc = curSrc;
return 1;
}
static int
swapReplace (int start, int end)
{
TranslationTableOffset swapRuleOffset;
TranslationTableRule *swapRule;
widechar *replacements;
int curRep;
int curPos;
int curTest;
int curSrc;
swapRuleOffset =
(passInstructions[passIC + 1] << 16) | passInstructions[passIC + 2];
swapRule = (TranslationTableRule *) & table->ruleArea[swapRuleOffset];
replacements = &swapRule->charsdots[swapRule->charslen];
for (curSrc = start; curSrc < end; curSrc++)
{
for (curTest = 0; curTest < swapRule->charslen; curTest++)
if (currentInput[curSrc] == swapRule->charsdots[curTest])
break;
if (curTest == swapRule->charslen)
continue;
curPos = 0;
for (curRep = 0; curRep < curTest; curRep++)
if (swapRule->opcode == CTO_SwapCc)
curPos++;
else
curPos += replacements[curPos];
if (swapRule->opcode == CTO_SwapCc)
{
if ((dest + 1) >= srcmax)
return 0;
srcMapping[dest] = prevSrcMapping[curSrc];
currentOutput[dest++] = replacements[curPos];
}
else
{
int k;
if ((dest + replacements[curPos] - 1) >= destmax)
return 0;
for (k = dest + replacements[curPos] - 1; k >= dest; --k)
srcMapping[k] = prevSrcMapping[curSrc];
memcpy (¤tOutput[dest], &replacements[curPos + 1],
(replacements[curPos]) * CHARSIZE);
dest += replacements[curPos] - 1;
}
}
return 1;
}
static TranslationTableRule *groupingRule;
static widechar groupingOp;
static int
replaceGrouping ()
{
widechar startCharDots = groupingRule->charsdots[2 * passCharDots];
widechar endCharDots = groupingRule->charsdots[2 * passCharDots + 1];
widechar *curin = (widechar *) currentInput;
int curPos;
int level = 0;
TranslationTableOffset replaceOffset = passInstructions[passIC + 1] <<
16 | (passInstructions[passIC + 2] & 0xff);
TranslationTableRule *replaceRule = (TranslationTableRule *) &
table->ruleArea[replaceOffset];
widechar replaceStart = replaceRule->charsdots[2 * passCharDots];
widechar replaceEnd = replaceRule->charsdots[2 * passCharDots + 1];
if (groupingOp == pass_groupstart)
{
curin[startReplace] = replaceStart;
for (curPos = startReplace + 1; curPos < srcmax; curPos++)
{
if (currentInput[curPos] == startCharDots)
level--;
if (currentInput[curPos] == endCharDots)
level++;
if (level == 1)
break;
}
if (curPos == srcmax)
return 0;
curin[curPos] = replaceEnd;
}
else
{
if (transOpcode == CTO_Context)
{
startCharDots = groupingRule->charsdots[2];
endCharDots = groupingRule->charsdots[3];
replaceStart = replaceRule->charsdots[2];
replaceEnd = replaceRule->charsdots[3];
}
currentOutput[dest] = replaceEnd;
for (curPos = dest - 1; curPos >= 0; curPos--)
{
if (currentOutput[curPos] == endCharDots)
level--;
if (currentOutput[curPos] == startCharDots)
level++;
if (level == 1)
break;
}
if (curPos < 0)
return 0;
currentOutput[curPos] = replaceStart;
dest++;
}
return 1;
}
static int
removeGrouping ()
{
widechar startCharDots = groupingRule->charsdots[2 * passCharDots];
widechar endCharDots = groupingRule->charsdots[2 * passCharDots + 1];
widechar *curin = (widechar *) currentInput;
int curPos;
int level = 0;
if (groupingOp == pass_groupstart)
{
for (curPos = startReplace + 1; curPos < srcmax; curPos++)
{
if (currentInput[curPos] == startCharDots)
level--;
if (currentInput[curPos] == endCharDots)
level++;
if (level == 1)
break;
}
if (curPos == srcmax)
return 0;
curPos++;
for (; curPos < srcmax; curPos++)
curin[curPos - 1] = curin[curPos];
srcmax--;
}
else
{
for (curPos = dest - 1; curPos >= 0; curPos--)
{
if (currentOutput[curPos] == endCharDots)
level--;
if (currentOutput[curPos] == startCharDots)
level++;
if (level == 1)
break;
}
if (curPos < 0)
return 0;
curPos++;
for (; curPos < dest; curPos++)
currentOutput[curPos - 1] = currentOutput[curPos];
dest--;
}
return 1;
}
static int searchIC;
static int searchSrc;
static int
doPassSearch ()
{
int level = 0;
int k, kk;
int not = 0;
TranslationTableOffset ruleOffset;
TranslationTableRule *rule;
TranslationTableCharacterAttributes attributes;
int stepper = passSrc;
while (stepper < srcmax)
{
searchIC = passIC + 1;
searchSrc = stepper;
while (searchIC < transRule->dotslen)
{
int itsTrue = 1;
if (searchSrc > srcmax)
return 0;
switch (passInstructions[searchIC])
{
case pass_lookback:
searchSrc -= passInstructions[searchIC + 1];
if (searchSrc < 0)
searchSrc = 0;
searchIC += 2;
break;
case pass_not:
not = 1;
searchIC++;
continue;
case pass_string:
case pass_dots:
kk = searchSrc;
for (k = searchIC + 2;
k < searchIC + 2 + passInstructions[searchIC + 1]; k++)
if (currentInput[kk] == ENDSEGMENT || passInstructions[k] !=
currentInput[kk++])
{
itsTrue = 0;
break;
}
searchSrc += passInstructions[searchIC + 1];
searchIC += passInstructions[searchIC + 1] + 2;
break;
case pass_startReplace:
searchIC++;
break;
case pass_endReplace:
searchIC++;
break;
case pass_attributes:
attributes =
(passInstructions[searchIC + 1] << 16) |
passInstructions[searchIC + 2];
for (k = 0; k < passInstructions[searchIC + 3]; k++)
{
if (currentInput[searchSrc] == ENDSEGMENT)
itsTrue = 0;
else
itsTrue =
(((findCharOrDots (currentInput[searchSrc++],
passCharDots)->
attributes & attributes)) ? 1 : 0);
if (!itsTrue)
break;
}
if (itsTrue)
{
for (k = passInstructions[searchIC + 3]; k <
passInstructions[searchIC + 4]; k++)
{
if (currentInput[searchSrc] == ENDSEGMENT)
{
itsTrue = 0;
break;
}
if (!
(findCharOrDots (currentInput[searchSrc],
passCharDots)->
attributes & attributes))
break;
searchSrc++;
}
}
searchIC += 5;
break;
case pass_groupstart:
case pass_groupend:
ruleOffset = (passInstructions[searchIC + 1] << 16) |
passInstructions[searchIC + 2];
rule = (TranslationTableRule *) & table->ruleArea[ruleOffset];
if (passInstructions[searchIC] == pass_groupstart)
itsTrue =
(currentInput[searchSrc] == rule->charsdots[2 *
passCharDots]) ?
1 : 0;
else
itsTrue =
(currentInput[searchSrc] == rule->charsdots[2 *
passCharDots +
1]) ? 1 : 0;
if (groupingRule != NULL && groupingOp == pass_groupstart
&& rule == groupingRule)
{
if (currentInput[searchSrc] == rule->charsdots[2 *
passCharDots])
level--;
else if (currentInput[searchSrc] ==
rule->charsdots[2 * passCharDots + 1])
level++;
}
searchSrc++;
searchIC += 3;
break;
case pass_swap:
itsTrue = swapTest (searchIC, &searchSrc);
searchIC += 5;
break;
case pass_eq:
if (passVariables[passInstructions[searchIC + 1]] !=
passInstructions[searchIC + 2])
itsTrue = 0;
searchIC += 3;
break;
case pass_lt:
if (passVariables[passInstructions[searchIC + 1]] >=
passInstructions[searchIC + 2])
itsTrue = 0;
searchIC += 3;
break;
case pass_gt:
if (passVariables[passInstructions[searchIC + 1]] <=
passInstructions[searchIC + 2])
itsTrue = 0;
searchIC += 3;
break;
case pass_lteq:
if (passVariables[passInstructions[searchIC + 1]] >
passInstructions[searchIC + 2])
itsTrue = 0;
searchIC += 3;
break;
case pass_gteq:
if (passVariables[passInstructions[searchIC + 1]] <
passInstructions[searchIC + 2])
itsTrue = 0;
searchIC += 3;
break;
case pass_endTest:
if (itsTrue)
{
if ((groupingRule && level == 1) || !groupingRule)
return 1;
}
searchIC = transRule->dotslen;
break;
default:
break;
}
if ((!not && !itsTrue) || (not && itsTrue))
break;
not = 0;
}
stepper++;
}
return 0;
}
static int
passDoTest ()
{
int k;
int not = 0;
TranslationTableOffset ruleOffset = 0;
TranslationTableRule *rule = NULL;
TranslationTableCharacterAttributes attributes = 0;
groupingRule = NULL;
passSrc = src;
passInstructions = &transRule->charsdots[transCharslen];
passIC = 0;
startMatch = endMatch = passSrc;
startReplace = endReplace = -1;
if (transOpcode == CTO_Context || transOpcode == CTO_Correct)
passCharDots = 0;
else
passCharDots = 1;
while (passIC < transRule->dotslen)
{
int itsTrue = 1;
if (passSrc > srcmax)
return 0;
switch (passInstructions[passIC])
{
case pass_first:
if (passSrc != 0)
itsTrue = 0;
passIC++;
break;
case pass_last:
if (passSrc != srcmax)
itsTrue = 0;
passIC++;
break;
case pass_lookback:
passSrc -= passInstructions[passIC + 1];
if (passSrc < 0)
passSrc = 0;
passIC += 2;
break;
case pass_not:
not = 1;
passIC++;
continue;
case pass_string:
case pass_dots:
itsTrue = matchCurrentInput ();
passSrc += passInstructions[passIC + 1];
passIC += passInstructions[passIC + 1] + 2;
break;
case pass_startReplace:
startReplace = passSrc;
passIC++;
break;
case pass_endReplace:
endReplace = passSrc;
passIC++;
break;
case pass_attributes:
attributes =
(passInstructions[passIC + 1] << 16) | passInstructions[passIC +
2];
for (k = 0; k < passInstructions[passIC + 3]; k++)
{
if (currentInput[passSrc] == ENDSEGMENT)
itsTrue = 0;
else
itsTrue =
(((findCharOrDots (currentInput[passSrc++],
passCharDots)->
attributes & attributes)) ? 1 : 0);
if (!itsTrue)
break;
}
if (itsTrue)
{
for (k = passInstructions[passIC + 3]; k <
passInstructions[passIC + 4]; k++)
{
if (currentInput[passSrc] == ENDSEGMENT)
{
itsTrue = 0;
break;
}
else
if (!
(findCharOrDots (currentInput[passSrc],
passCharDots)->
attributes & attributes))
break;
passSrc++;
}
}
passIC += 5;
break;
case pass_groupstart:
case pass_groupend:
ruleOffset = (passInstructions[passIC + 1] << 16) |
passInstructions[passIC + 2];
rule = (TranslationTableRule *) & table->ruleArea[ruleOffset];
if (passIC == 0 || (passIC > 0 && passInstructions[passIC - 1] ==
pass_startReplace))
{
groupingRule = rule;
groupingOp = passInstructions[passIC];
}
if (passInstructions[passIC] == pass_groupstart)
itsTrue = (currentInput[passSrc] == rule->charsdots[2 *
passCharDots])
? 1 : 0;
else
itsTrue = (currentInput[passSrc] == rule->charsdots[2 *
passCharDots +
1]) ? 1 : 0;
passSrc++;
passIC += 3;
break;
case pass_swap:
itsTrue = swapTest (passIC, &passSrc);
passIC += 5;
break;
case pass_eq:
if (passVariables[passInstructions[passIC + 1]] !=
passInstructions[passIC + 2])
itsTrue = 0;
passIC += 3;
break;
case pass_lt:
if (passVariables[passInstructions[passIC + 1]] >=
passInstructions[passIC + 2])
itsTrue = 0;
passIC += 3;
break;
case pass_gt:
if (passVariables[passInstructions[passIC + 1]] <=
passInstructions[passIC + 2])
itsTrue = 0;
passIC += 3;
break;
case pass_lteq:
if (passVariables[passInstructions[passIC + 1]] >
passInstructions[passIC + 2])
itsTrue = 0;
passIC += 3;
break;
case pass_gteq:
if (passVariables[passInstructions[passIC + 1]] <
passInstructions[passIC + 2])
itsTrue = 0;
passIC += 3;
break;
case pass_search:
itsTrue = doPassSearch ();
if ((!not && !itsTrue) || (not && itsTrue))
return 0;
passIC = searchIC;
passSrc = searchSrc;
case pass_endTest:
passIC++;
endMatch = passSrc;
if (startReplace == -1)
{
startReplace = startMatch;
endReplace = endMatch;
}
return 1;
break;
default:
return 0;
}
if ((!not && !itsTrue) || (not && itsTrue))
return 0;
not = 0;
}
return 0;
}
static int
passDoAction ()
{
int k;
TranslationTableOffset ruleOffset = 0;
TranslationTableRule *rule = NULL;
if ((dest + startReplace - startMatch) > destmax)
return 0;
if (transOpcode != CTO_Context)
memmove (&srcMapping[dest], &prevSrcMapping[startMatch],
(startReplace - startMatch) * sizeof (int));
for (k = startMatch; k < startReplace; k++)
if (transOpcode == CTO_Context)
{
if (!putCharacter (currentInput[k]))
return 0;
}
else
currentOutput[dest++] = currentInput[k];
while (passIC < transRule->dotslen)
switch (passInstructions[passIC])
{
case pass_string:
case pass_dots:
if ((dest + passInstructions[passIC + 1]) > destmax)
return 0;
for (k = 0; k < passInstructions[passIC + 1]; ++k)
srcMapping[dest + k] = prevSrcMapping[startReplace];
memcpy (¤tOutput[dest], &passInstructions[passIC + 2],
passInstructions[passIC + 1] * CHARSIZE);
dest += passInstructions[passIC + 1];
passIC += passInstructions[passIC + 1] + 2;
break;
case pass_eq:
passVariables[passInstructions[passIC + 1]] =
passInstructions[passIC + 2];
passIC += 3;
break;
case pass_hyphen:
passVariables[passInstructions[passIC + 1]]--;
if (passVariables[passInstructions[passIC + 1]] < 0)
passVariables[passInstructions[passIC + 1]] = 0;
passIC += 2;
break;
case pass_plus:
passVariables[passInstructions[passIC + 1]]++;
passIC += 2;
break;
case pass_groupstart:
ruleOffset = (passInstructions[passIC + 1] << 16) |
passInstructions[passIC + 2];
rule = (TranslationTableRule *) & table->ruleArea[ruleOffset];
srcMapping[dest] = prevSrcMapping[startMatch];
currentOutput[dest++] = rule->charsdots[2 * passCharDots];
passIC += 3;
break;
case pass_groupend:
ruleOffset = (passInstructions[passIC + 1] << 16) |
passInstructions[passIC + 2];
rule = (TranslationTableRule *) & table->ruleArea[ruleOffset];
srcMapping[dest] = prevSrcMapping[startMatch];
currentOutput[dest++] = rule->charsdots[2 * passCharDots + 1];
passIC += 3;
break;
case pass_swap:
if (!swapReplace (startReplace, endReplace))
return 0;
passIC += 3;
break;
case pass_groupreplace:
if (!groupingRule || !replaceGrouping ())
return 0;
passIC += 3;
break;
case pass_omit:
if (groupingRule)
removeGrouping ();
passIC++;
break;
case pass_copy:
dest -= startReplace - startMatch;
k = endReplace - startReplace;
if ((dest + k) > destmax)
return 0;
memmove (&srcMapping[dest], &prevSrcMapping[startReplace],
k * sizeof (int));
memcpy (¤tOutput[dest], ¤tInput[startReplace],
k * CHARSIZE);
dest += k;
passIC++;
endReplace = passSrc;
break;
default:
return 0;
}
return 1;
}
static int