Check in the pristine copy of ICU 4.6...

icu46/source/common/ucnv_u16.c

Index: icu46/source/common/ucnv_u16.c
===================================================================
--- icu46/source/common/ucnv_u16.c	(revision 0)
+++ icu46/source/common/ucnv_u16.c	(revision 0)
@@ -0,0 +1,1561 @@
+/*  
+**********************************************************************
+*   Copyright (C) 2002-2010, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+**********************************************************************
+*   file name:  ucnv_u16.c
+*   encoding:   US-ASCII
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 2002jul01
+*   created by: Markus W. Scherer
+*
+*   UTF-16 converter implementation. Used to be in ucnv_utf.c.
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_CONVERSION
+
+#include "unicode/ucnv.h"
+#include "ucnv_bld.h"
+#include "ucnv_cnv.h"
+#include "cmemory.h"
+
+enum {
+    UCNV_NEED_TO_WRITE_BOM=1
+};
+
+/*
+ * The UTF-16 toUnicode implementation is also used for the Java-specific
+ * "with BOM" variants of UTF-16BE and UTF-16LE.
+ */
+static void
+_UTF16ToUnicodeWithOffsets(UConverterToUnicodeArgs *pArgs,
+                           UErrorCode *pErrorCode);
+
+/* UTF-16BE ----------------------------------------------------------------- */
+
+#if U_IS_BIG_ENDIAN
+#   define _UTF16PEFromUnicodeWithOffsets   _UTF16BEFromUnicodeWithOffsets
+#else
+#   define _UTF16PEFromUnicodeWithOffsets   _UTF16LEFromUnicodeWithOffsets
+#endif
+
+
+static void
+_UTF16BEFromUnicodeWithOffsets(UConverterFromUnicodeArgs *pArgs,
+                               UErrorCode *pErrorCode) {
+    UConverter *cnv;
+    const UChar *source;
+    char *target;
+    int32_t *offsets;
+
+    uint32_t targetCapacity, length, sourceIndex;
+    UChar c, trail;
+    char overflow[4];
+
+    source=pArgs->source;
+    length=(int32_t)(pArgs->sourceLimit-source);
+    if(length<=0) {
+        /* no input, nothing to do */
+        return;
+    }
+
+    cnv=pArgs->converter;
+
+    /* write the BOM if necessary */
+    if(cnv->fromUnicodeStatus==UCNV_NEED_TO_WRITE_BOM) {
+        static const char bom[]={ (char)0xfe, (char)0xff };
+        ucnv_fromUWriteBytes(cnv,
+                             bom, 2,
+                             &pArgs->target, pArgs->targetLimit,
+                             &pArgs->offsets, -1,
+                             pErrorCode);
+        cnv->fromUnicodeStatus=0;
+    }
+
+    target=pArgs->target;
+    if(target >= pArgs->targetLimit) {
+        *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+        return;
+    }
+
+    targetCapacity=(uint32_t)(pArgs->targetLimit-target);
+    offsets=pArgs->offsets;
+    sourceIndex=0;
+
+    /* c!=0 indicates in several places outside the main loops that a surrogate was found */
+
+    if((c=(UChar)cnv->fromUChar32)!=0 && U16_IS_TRAIL(trail=*source) && targetCapacity>=4) {
+        /* the last buffer ended with a lead surrogate, output the surrogate pair */
+        ++source;
+        --length;
+        target[0]=(uint8_t)(c>>8);
+        target[1]=(uint8_t)c;
+        target[2]=(uint8_t)(trail>>8);
+        target[3]=(uint8_t)trail;
+        target+=4;
+        targetCapacity-=4;
+        if(offsets!=NULL) {
+            *offsets++=-1;
+            *offsets++=-1;
+            *offsets++=-1;
+            *offsets++=-1;
+        }
+        sourceIndex=1;
+        cnv->fromUChar32=c=0;
+    }
+
+    if(c==0) {
+        /* copy an even number of bytes for complete UChars */
+        uint32_t count=2*length;
+        if(count>targetCapacity) {
+            count=targetCapacity&~1;
+        }
+        /* count is even */
+        targetCapacity-=count;
+        count>>=1;
+        length-=count;
+
+        if(offsets==NULL) {
+            while(count>0) {
+                c=*source++;
+                if(U16_IS_SINGLE(c)) {
+                    target[0]=(uint8_t)(c>>8);
+                    target[1]=(uint8_t)c;
+                    target+=2;
+                } else if(U16_IS_SURROGATE_LEAD(c) && count>=2 && U16_IS_TRAIL(trail=*source)) {
+                    ++source;
+                    --count;
+                    target[0]=(uint8_t)(c>>8);
+                    target[1]=(uint8_t)c;
+                    target[2]=(uint8_t)(trail>>8);
+                    target[3]=(uint8_t)trail;
+                    target+=4;
+                } else {
+                    break;
+                }
+                --count;
+            }
+        } else {
+            while(count>0) {
+                c=*source++;
+                if(U16_IS_SINGLE(c)) {
+                    target[0]=(uint8_t)(c>>8);
+                    target[1]=(uint8_t)c;
+                    target+=2;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex++;
+                } else if(U16_IS_SURROGATE_LEAD(c) && count>=2 && U16_IS_TRAIL(trail=*source)) {
+                    ++source;
+                    --count;
+                    target[0]=(uint8_t)(c>>8);
+                    target[1]=(uint8_t)c;
+                    target[2]=(uint8_t)(trail>>8);
+                    target[3]=(uint8_t)trail;
+                    target+=4;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex;
+                    sourceIndex+=2;
+                } else {
+                    break;
+                }
+                --count;
+            }
+        }
+
+        if(count==0) {
+            /* done with the loop for complete UChars */
+            if(length>0 && targetCapacity>0) {
+                /*
+                 * there is more input and some target capacity -
+                 * it must be targetCapacity==1 because otherwise
+                 * the above would have copied more;
+                 * prepare for overflow output
+                 */
+                if(U16_IS_SINGLE(c=*source++)) {
+                    overflow[0]=(char)(c>>8);
+                    overflow[1]=(char)c;
+                    length=2; /* 2 bytes to output */
+                    c=0;
+                /* } else { keep c for surrogate handling, length will be set there */
+                }
+            } else {
+                length=0;
+                c=0;
+            }
+        } else {
+            /* keep c for surrogate handling, length will be set there */
+            targetCapacity+=2*count;
+        }
+    } else {
+        length=0; /* from here on, length counts the bytes in overflow[] */
+    }
+    
+    if(c!=0) {
+        /*
+         * c is a surrogate, and
+         * - source or target too short
+         * - or the surrogate is unmatched
+         */
+        length=0;
+        if(U16_IS_SURROGATE_LEAD(c)) {
+            if(source<pArgs->sourceLimit) {
+                if(U16_IS_TRAIL(trail=*source)) {
+                    /* output the surrogate pair, will overflow (see conditions comment above) */
+                    ++source;
+                    overflow[0]=(char)(c>>8);
+                    overflow[1]=(char)c;
+                    overflow[2]=(char)(trail>>8);
+                    overflow[3]=(char)trail;
+                    length=4; /* 4 bytes to output */
+                    c=0;
+                } else {
+                    /* unmatched lead surrogate */
+                    *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+                }
+            } else {
+                /* see if the trail surrogate is in the next buffer */
+            }
+        } else {
+            /* unmatched trail surrogate */
+            *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+        }
+        cnv->fromUChar32=c;
+    }
+
+    if(length>0) {
+        /* output length bytes with overflow (length>targetCapacity>0) */
+        ucnv_fromUWriteBytes(cnv,
+                             overflow, length,
+                             (char **)&target, pArgs->targetLimit,
+                             &offsets, sourceIndex,
+                             pErrorCode);
+        targetCapacity=(uint32_t)(pArgs->targetLimit-(char *)target);
+    }
+
+    if(U_SUCCESS(*pErrorCode) && source<pArgs->sourceLimit && targetCapacity==0) {
+        *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+    }
+
+    /* write back the updated pointers */
+    pArgs->source=source;
+    pArgs->target=(char *)target;
+    pArgs->offsets=offsets;
+}
+
+static void
+_UTF16BEToUnicodeWithOffsets(UConverterToUnicodeArgs *pArgs,
+                             UErrorCode *pErrorCode) {
+    UConverter *cnv;
+    const uint8_t *source;
+    UChar *target;
+    int32_t *offsets;
+
+    uint32_t targetCapacity, length, count, sourceIndex;
+    UChar c, trail;
+
+    if(pArgs->converter->mode<8) {
+        _UTF16ToUnicodeWithOffsets(pArgs, pErrorCode);
+        return;
+    }
+
+    cnv=pArgs->converter;
+    source=(const uint8_t *)pArgs->source;
+    length=(int32_t)((const uint8_t *)pArgs->sourceLimit-source);
+    if(length<=0 && cnv->toUnicodeStatus==0) {
+        /* no input, nothing to do */
+        return;
+    }
+
+    target=pArgs->target;
+    if(target >= pArgs->targetLimit) {
+        *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+        return;
+    }
+
+    targetCapacity=(uint32_t)(pArgs->targetLimit-target);
+    offsets=pArgs->offsets;
+    sourceIndex=0;
+    c=0;
+
+    /* complete a partial UChar or pair from the last call */
+    if(cnv->toUnicodeStatus!=0) {
+        /*
+         * special case: single byte from a previous buffer,
+         * where the byte turned out not to belong to a trail surrogate
+         * and the preceding, unmatched lead surrogate was put into toUBytes[]
+         * for error handling
+         */
+        cnv->toUBytes[0]=(uint8_t)cnv->toUnicodeStatus;
+        cnv->toULength=1;
+        cnv->toUnicodeStatus=0;
+    }
+    if((count=cnv->toULength)!=0) {
+        uint8_t *p=cnv->toUBytes;
+        do {
+            p[count++]=*source++;
+            ++sourceIndex;
+            --length;
+            if(count==2) {
+                c=((UChar)p[0]<<8)|p[1];
+                if(U16_IS_SINGLE(c)) {
+                    /* output the BMP code point */
+                    *target++=c;
+                    if(offsets!=NULL) {
+                        *offsets++=-1;
+                    }
+                    --targetCapacity;
+                    count=0;
+                    c=0;
+                    break;
+                } else if(U16_IS_SURROGATE_LEAD(c)) {
+                    /* continue collecting bytes for the trail surrogate */
+                    c=0; /* avoid unnecessary surrogate handling below */
+                } else {
+                    /* fall through to error handling for an unmatched trail surrogate */
+                    break;
+                }
+            } else if(count==4) {
+                c=((UChar)p[0]<<8)|p[1];
+                trail=((UChar)p[2]<<8)|p[3];
+                if(U16_IS_TRAIL(trail)) {
+                    /* output the surrogate pair */
+                    *target++=c;
+                    if(targetCapacity>=2) {
+                        *target++=trail;
+                        if(offsets!=NULL) {
+                            *offsets++=-1;
+                            *offsets++=-1;
+                        }
+                        targetCapacity-=2;
+                    } else /* targetCapacity==1 */ {
+                        targetCapacity=0;
+                        cnv->UCharErrorBuffer[0]=trail;
+                        cnv->UCharErrorBufferLength=1;
+                        *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+                    }
+                    count=0;
+                    c=0;
+                    break;
+                } else {
+                    /* unmatched lead surrogate, handle here for consistent toUBytes[] */
+                    *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+
+                    /* back out reading the code unit after it */
+                    if(((const uint8_t *)pArgs->source-source)>=2) {
+                        source-=2;
+                    } else {
+                        /*
+                         * if the trail unit's first byte was in a previous buffer, then
+                         * we need to put it into a special place because toUBytes[] will be
+                         * used for the lead unit's bytes
+                         */
+                        cnv->toUnicodeStatus=0x100|p[2];
+                        --source;
+                    }
+                    cnv->toULength=2;
+
+                    /* write back the updated pointers */
+                    pArgs->source=(const char *)source;
+                    pArgs->target=target;
+                    pArgs->offsets=offsets;
+                    return;
+                }
+            }
+        } while(length>0);
+        cnv->toULength=(int8_t)count;
+    }
+
+    /* copy an even number of bytes for complete UChars */
+    count=2*targetCapacity;
+    if(count>length) {
+        count=length&~1;
+    }
+    if(c==0 && count>0) {
+        length-=count;
+        count>>=1;
+        targetCapacity-=count;
+        if(offsets==NULL) {
+            do {
+                c=((UChar)source[0]<<8)|source[1];
+                source+=2;
+                if(U16_IS_SINGLE(c)) {
+                    *target++=c;
+                } else if(U16_IS_SURROGATE_LEAD(c) && count>=2 &&
+                          U16_IS_TRAIL(trail=((UChar)source[0]<<8)|source[1])
+                ) {
+                    source+=2;
+                    --count;
+                    *target++=c;
+                    *target++=trail;
+                } else {
+                    break;
+                }
+            } while(--count>0);
+        } else {
+            do {
+                c=((UChar)source[0]<<8)|source[1];
+                source+=2;
+                if(U16_IS_SINGLE(c)) {
+                    *target++=c;
+                    *offsets++=sourceIndex;
+                    sourceIndex+=2;
+                } else if(U16_IS_SURROGATE_LEAD(c) && count>=2 &&
+                          U16_IS_TRAIL(trail=((UChar)source[0]<<8)|source[1])
+                ) {
+                    source+=2;
+                    --count;
+                    *target++=c;
+                    *target++=trail;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex;
+                    sourceIndex+=4;
+                } else {
+                    break;
+                }
+            } while(--count>0);
+        }
+
+        if(count==0) {
+            /* done with the loop for complete UChars */
+            c=0;
+        } else {
+            /* keep c for surrogate handling, trail will be set there */
+            length+=2*(count-1); /* one more byte pair was consumed than count decremented */
+            targetCapacity+=count;
+        }
+    }
+
+    if(c!=0) {
+        /*
+         * c is a surrogate, and
+         * - source or target too short
+         * - or the surrogate is unmatched
+         */
+        cnv->toUBytes[0]=(uint8_t)(c>>8);
+        cnv->toUBytes[1]=(uint8_t)c;
+        cnv->toULength=2;
+
+        if(U16_IS_SURROGATE_LEAD(c)) {
+            if(length>=2) {
+                if(U16_IS_TRAIL(trail=((UChar)source[0]<<8)|source[1])) {
+                    /* output the surrogate pair, will overflow (see conditions comment above) */
+                    source+=2;
+                    length-=2;
+                    *target++=c;
+                    if(offsets!=NULL) {
+                        *offsets++=sourceIndex;
+                    }
+                    cnv->UCharErrorBuffer[0]=trail;
+                    cnv->UCharErrorBufferLength=1;
+                    cnv->toULength=0;
+                    *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+                } else {
+                    /* unmatched lead surrogate */
+                    *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+                }
+            } else {
+                /* see if the trail surrogate is in the next buffer */
+            }
+        } else {
+            /* unmatched trail surrogate */
+            *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+        }
+    }
+
+    if(U_SUCCESS(*pErrorCode)) {
+        /* check for a remaining source byte */
+        if(length>0) {
+            if(targetCapacity==0) {
+                *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+            } else {
+                /* it must be length==1 because otherwise the above would have copied more */
+                cnv->toUBytes[cnv->toULength++]=*source++;
+            }
+        }
+    }
+
+    /* write back the updated pointers */
+    pArgs->source=(const char *)source;
+    pArgs->target=target;
+    pArgs->offsets=offsets;
+}
+
+static UChar32
+_UTF16BEGetNextUChar(UConverterToUnicodeArgs *pArgs, UErrorCode *err) {
+    const uint8_t *s, *sourceLimit;
+    UChar32 c;
+
+    if(pArgs->converter->mode<8) {
+        return UCNV_GET_NEXT_UCHAR_USE_TO_U;
+    }
+
+    s=(const uint8_t *)pArgs->source;
+    sourceLimit=(const uint8_t *)pArgs->sourceLimit;
+
+    if(s>=sourceLimit) {
+        /* no input */
+        *err=U_INDEX_OUTOFBOUNDS_ERROR;
+        return 0xffff;
+    }
+
+    if(s+2>sourceLimit) {
+        /* only one byte: truncated UChar */
+        pArgs->converter->toUBytes[0]=*s++;
+        pArgs->converter->toULength=1;
+        pArgs->source=(const char *)s;
+        *err = U_TRUNCATED_CHAR_FOUND;
+        return 0xffff;
+    }
+
+    /* get one UChar */
+    c=((UChar32)*s<<8)|s[1];
+    s+=2;
+
+    /* check for a surrogate pair */
+    if(U_IS_SURROGATE(c)) {
+        if(U16_IS_SURROGATE_LEAD(c)) {
+            if(s+2<=sourceLimit) {
+                UChar trail;
+
+                /* get a second UChar and see if it is a trail surrogate */
+                trail=((UChar)*s<<8)|s[1];
+                if(U16_IS_TRAIL(trail)) {
+                    c=U16_GET_SUPPLEMENTARY(c, trail);
+                    s+=2;
+                } else {
+                    /* unmatched lead surrogate */
+                    c=-2;
+                }
+            } else {
+                /* too few (2 or 3) bytes for a surrogate pair: truncated code point */
+                uint8_t *bytes=pArgs->converter->toUBytes;
+                s-=2;
+                pArgs->converter->toULength=(int8_t)(sourceLimit-s);
+                do {
+                    *bytes++=*s++;
+                } while(s<sourceLimit);
+
+                c=0xffff;
+                *err=U_TRUNCATED_CHAR_FOUND;
+            }
+        } else {
+            /* unmatched trail surrogate */
+            c=-2;
+        }
+
+        if(c<0) {
+            /* write the unmatched surrogate */
+            uint8_t *bytes=pArgs->converter->toUBytes;
+            pArgs->converter->toULength=2;
+            *bytes=*(s-2);
+            bytes[1]=*(s-1);
+
+            c=0xffff;
+            *err=U_ILLEGAL_CHAR_FOUND;
+        }
+    }
+
+    pArgs->source=(const char *)s;
+    return c;
+} 
+
+static void
+_UTF16BEReset(UConverter *cnv, UConverterResetChoice choice) {
+    if(choice<=UCNV_RESET_TO_UNICODE) {
+        /* reset toUnicode state */
+        if(UCNV_GET_VERSION(cnv)==0) {
+            cnv->mode=8; /* no BOM handling */
+        } else {
+            cnv->mode=0; /* Java-specific "UnicodeBig" requires BE BOM or no BOM */
+        }
+    }
+    if(choice!=UCNV_RESET_TO_UNICODE && UCNV_GET_VERSION(cnv)==1) {
+        /* reset fromUnicode for "UnicodeBig": prepare to output the UTF-16BE BOM */
+        cnv->fromUnicodeStatus=UCNV_NEED_TO_WRITE_BOM;
+    }
+}
+
+static void
+_UTF16BEOpen(UConverter *cnv,
+             UConverterLoadArgs *pArgs,
+             UErrorCode *pErrorCode) {
+    if(UCNV_GET_VERSION(cnv)<=1) {
+        _UTF16BEReset(cnv, UCNV_RESET_BOTH);
+    } else {
+        *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+    }
+}
+
+static const char *
+_UTF16BEGetName(const UConverter *cnv) {
+    if(UCNV_GET_VERSION(cnv)==0) {
+        return "UTF-16BE";
+    } else {
+        return "UTF-16BE,version=1";
+    }
+}
+
+static const UConverterImpl _UTF16BEImpl={
+    UCNV_UTF16_BigEndian,
+
+    NULL,
+    NULL,
+
+    _UTF16BEOpen,
+    NULL,
+    _UTF16BEReset,
+
+    _UTF16BEToUnicodeWithOffsets,
+    _UTF16BEToUnicodeWithOffsets,
+    _UTF16BEFromUnicodeWithOffsets,
+    _UTF16BEFromUnicodeWithOffsets,
+    _UTF16BEGetNextUChar,
+
+    NULL,
+    _UTF16BEGetName,
+    NULL,
+    NULL,
+    ucnv_getNonSurrogateUnicodeSet
+};
+
+static const UConverterStaticData _UTF16BEStaticData={
+    sizeof(UConverterStaticData),
+    "UTF-16BE",
+    1200, UCNV_IBM, UCNV_UTF16_BigEndian, 2, 2,
+    { 0xff, 0xfd, 0, 0 },2,FALSE,FALSE,
+    0,
+    0,
+    { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
+};
+
+
+const UConverterSharedData _UTF16BEData={
+    sizeof(UConverterSharedData), ~((uint32_t) 0),
+    NULL, NULL, &_UTF16BEStaticData, FALSE, &_UTF16BEImpl, 
+    0
+};
+
+/* UTF-16LE ----------------------------------------------------------------- */
+
+static void
+_UTF16LEFromUnicodeWithOffsets(UConverterFromUnicodeArgs *pArgs,
+                               UErrorCode *pErrorCode) {
+    UConverter *cnv;
+    const UChar *source;
+    char *target;
+    int32_t *offsets;
+
+    uint32_t targetCapacity, length, sourceIndex;
+    UChar c, trail;
+    char overflow[4];
+
+    source=pArgs->source;
+    length=(int32_t)(pArgs->sourceLimit-source);
+    if(length<=0) {
+        /* no input, nothing to do */
+        return;
+    }
+
+    cnv=pArgs->converter;
+
+    /* write the BOM if necessary */
+    if(cnv->fromUnicodeStatus==UCNV_NEED_TO_WRITE_BOM) {
+        static const char bom[]={ (char)0xff, (char)0xfe };
+        ucnv_fromUWriteBytes(cnv,
+                             bom, 2,
+                             &pArgs->target, pArgs->targetLimit,
+                             &pArgs->offsets, -1,
+                             pErrorCode);
+        cnv->fromUnicodeStatus=0;
+    }
+
+    target=pArgs->target;
+    if(target >= pArgs->targetLimit) {
+        *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+        return;
+    }
+
+    targetCapacity=(uint32_t)(pArgs->targetLimit-pArgs->target);
+    offsets=pArgs->offsets;
+    sourceIndex=0;
+
+    /* c!=0 indicates in several places outside the main loops that a surrogate was found */
+
+    if((c=(UChar)cnv->fromUChar32)!=0 && U16_IS_TRAIL(trail=*source) && targetCapacity>=4) {
+        /* the last buffer ended with a lead surrogate, output the surrogate pair */
+        ++source;
+        --length;
+        target[0]=(uint8_t)c;
+        target[1]=(uint8_t)(c>>8);
+        target[2]=(uint8_t)trail;
+        target[3]=(uint8_t)(trail>>8);
+        target+=4;
+        targetCapacity-=4;
+        if(offsets!=NULL) {
+            *offsets++=-1;
+            *offsets++=-1;
+            *offsets++=-1;
+            *offsets++=-1;
+        }
+        sourceIndex=1;
+        cnv->fromUChar32=c=0;
+    }
+
+    if(c==0) {
+        /* copy an even number of bytes for complete UChars */
+        uint32_t count=2*length;
+        if(count>targetCapacity) {
+            count=targetCapacity&~1;
+        }
+        /* count is even */
+        targetCapacity-=count;
+        count>>=1;
+        length-=count;
+
+        if(offsets==NULL) {
+            while(count>0) {
+                c=*source++;
+                if(U16_IS_SINGLE(c)) {
+                    target[0]=(uint8_t)c;
+                    target[1]=(uint8_t)(c>>8);
+                    target+=2;
+                } else if(U16_IS_SURROGATE_LEAD(c) && count>=2 && U16_IS_TRAIL(trail=*source)) {
+                    ++source;
+                    --count;
+                    target[0]=(uint8_t)c;
+                    target[1]=(uint8_t)(c>>8);
+                    target[2]=(uint8_t)trail;
+                    target[3]=(uint8_t)(trail>>8);
+                    target+=4;
+                } else {
+                    break;
+                }
+                --count;
+            }
+        } else {
+            while(count>0) {
+                c=*source++;
+                if(U16_IS_SINGLE(c)) {
+                    target[0]=(uint8_t)c;
+                    target[1]=(uint8_t)(c>>8);
+                    target+=2;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex++;
+                } else if(U16_IS_SURROGATE_LEAD(c) && count>=2 && U16_IS_TRAIL(trail=*source)) {
+                    ++source;
+                    --count;
+                    target[0]=(uint8_t)c;
+                    target[1]=(uint8_t)(c>>8);
+                    target[2]=(uint8_t)trail;
+                    target[3]=(uint8_t)(trail>>8);
+                    target+=4;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex;
+                    sourceIndex+=2;
+                } else {
+                    break;
+                }
+                --count;
+            }
+        }
+
+        if(count==0) {
+            /* done with the loop for complete UChars */
+            if(length>0 && targetCapacity>0) {
+                /*
+                 * there is more input and some target capacity -
+                 * it must be targetCapacity==1 because otherwise
+                 * the above would have copied more;
+                 * prepare for overflow output
+                 */
+                if(U16_IS_SINGLE(c=*source++)) {
+                    overflow[0]=(char)c;
+                    overflow[1]=(char)(c>>8);
+                    length=2; /* 2 bytes to output */
+                    c=0;
+                /* } else { keep c for surrogate handling, length will be set there */
+                }
+            } else {
+                length=0;
+                c=0;
+            }
+        } else {
+            /* keep c for surrogate handling, length will be set there */
+            targetCapacity+=2*count;
+        }
+    } else {
+        length=0; /* from here on, length counts the bytes in overflow[] */
+    }
+    
+    if(c!=0) {
+        /*
+         * c is a surrogate, and
+         * - source or target too short
+         * - or the surrogate is unmatched
+         */
+        length=0;
+        if(U16_IS_SURROGATE_LEAD(c)) {
+            if(source<pArgs->sourceLimit) {
+                if(U16_IS_TRAIL(trail=*source)) {
+                    /* output the surrogate pair, will overflow (see conditions comment above) */
+                    ++source;
+                    overflow[0]=(char)c;
+                    overflow[1]=(char)(c>>8);
+                    overflow[2]=(char)trail;
+                    overflow[3]=(char)(trail>>8);
+                    length=4; /* 4 bytes to output */
+                    c=0;
+                } else {
+                    /* unmatched lead surrogate */
+                    *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+                }
+            } else {
+                /* see if the trail surrogate is in the next buffer */
+            }
+        } else {
+            /* unmatched trail surrogate */
+            *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+        }
+        cnv->fromUChar32=c;
+    }
+
+    if(length>0) {
+        /* output length bytes with overflow (length>targetCapacity>0) */
+        ucnv_fromUWriteBytes(cnv,
+                             overflow, length,
+                             &target, pArgs->targetLimit,
+                             &offsets, sourceIndex,
+                             pErrorCode);
+        targetCapacity=(uint32_t)(pArgs->targetLimit-(char *)target);
+    }
+
+    if(U_SUCCESS(*pErrorCode) && source<pArgs->sourceLimit && targetCapacity==0) {
+        *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+    }
+
+    /* write back the updated pointers */
+    pArgs->source=source;
+    pArgs->target=target;
+    pArgs->offsets=offsets;
+}
+
+static void
+_UTF16LEToUnicodeWithOffsets(UConverterToUnicodeArgs *pArgs,
+                             UErrorCode *pErrorCode) {
+    UConverter *cnv;
+    const uint8_t *source;
+    UChar *target;
+    int32_t *offsets;
+
+    uint32_t targetCapacity, length, count, sourceIndex;
+    UChar c, trail;
+
+    if(pArgs->converter->mode<8) {
+        _UTF16ToUnicodeWithOffsets(pArgs, pErrorCode);
+        return;
+    }
+
+    cnv=pArgs->converter;
+    source=(const uint8_t *)pArgs->source;
+    length=(int32_t)((const uint8_t *)pArgs->sourceLimit-source);
+    if(length<=0 && cnv->toUnicodeStatus==0) {
+        /* no input, nothing to do */
+        return;
+    }
+
+    target=pArgs->target;
+    if(target >= pArgs->targetLimit) {
+        *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+        return;
+    }
+
+    targetCapacity=(uint32_t)(pArgs->targetLimit-pArgs->target);
+    offsets=pArgs->offsets;
+    sourceIndex=0;
+    c=0;
+
+    /* complete a partial UChar or pair from the last call */
+    if(cnv->toUnicodeStatus!=0) {
+        /*
+         * special case: single byte from a previous buffer,
+         * where the byte turned out not to belong to a trail surrogate
+         * and the preceding, unmatched lead surrogate was put into toUBytes[]
+         * for error handling
+         */
+        cnv->toUBytes[0]=(uint8_t)cnv->toUnicodeStatus;
+        cnv->toULength=1;
+        cnv->toUnicodeStatus=0;
+    }
+    if((count=cnv->toULength)!=0) {
+        uint8_t *p=cnv->toUBytes;
+        do {
+            p[count++]=*source++;
+            ++sourceIndex;
+            --length;
+            if(count==2) {
+                c=((UChar)p[1]<<8)|p[0];
+                if(U16_IS_SINGLE(c)) {
+                    /* output the BMP code point */
+                    *target++=c;
+                    if(offsets!=NULL) {
+                        *offsets++=-1;
+                    }
+                    --targetCapacity;
+                    count=0;
+                    c=0;
+                    break;
+                } else if(U16_IS_SURROGATE_LEAD(c)) {
+                    /* continue collecting bytes for the trail surrogate */
+                    c=0; /* avoid unnecessary surrogate handling below */
+                } else {
+                    /* fall through to error handling for an unmatched trail surrogate */
+                    break;
+                }
+            } else if(count==4) {
+                c=((UChar)p[1]<<8)|p[0];
+                trail=((UChar)p[3]<<8)|p[2];
+                if(U16_IS_TRAIL(trail)) {
+                    /* output the surrogate pair */
+                    *target++=c;
+                    if(targetCapacity>=2) {
+                        *target++=trail;
+                        if(offsets!=NULL) {
+                            *offsets++=-1;
+                            *offsets++=-1;
+                        }
+                        targetCapacity-=2;
+                    } else /* targetCapacity==1 */ {
+                        targetCapacity=0;
+                        cnv->UCharErrorBuffer[0]=trail;
+                        cnv->UCharErrorBufferLength=1;
+                        *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+                    }
+                    count=0;
+                    c=0;
+                    break;
+                } else {
+                    /* unmatched lead surrogate, handle here for consistent toUBytes[] */
+                    *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+
+                    /* back out reading the code unit after it */
+                    if(((const uint8_t *)pArgs->source-source)>=2) {
+                        source-=2;
+                    } else {
+                        /*
+                         * if the trail unit's first byte was in a previous buffer, then
+                         * we need to put it into a special place because toUBytes[] will be
+                         * used for the lead unit's bytes
+                         */
+                        cnv->toUnicodeStatus=0x100|p[2];
+                        --source;
+                    }
+                    cnv->toULength=2;
+
+                    /* write back the updated pointers */
+                    pArgs->source=(const char *)source;
+                    pArgs->target=target;
+                    pArgs->offsets=offsets;
+                    return;
+                }
+            }
+        } while(length>0);
+        cnv->toULength=(int8_t)count;
+    }
+
+    /* copy an even number of bytes for complete UChars */
+    count=2*targetCapacity;
+    if(count>length) {
+        count=length&~1;
+    }
+    if(c==0 && count>0) {
+        length-=count;
+        count>>=1;
+        targetCapacity-=count;
+        if(offsets==NULL) {
+            do {
+                c=((UChar)source[1]<<8)|source[0];
+                source+=2;
+                if(U16_IS_SINGLE(c)) {
+                    *target++=c;
+                } else if(U16_IS_SURROGATE_LEAD(c) && count>=2 &&
+                          U16_IS_TRAIL(trail=((UChar)source[1]<<8)|source[0])
+                ) {
+                    source+=2;
+                    --count;
+                    *target++=c;
+                    *target++=trail;
+                } else {
+                    break;
+                }
+            } while(--count>0);
+        } else {
+            do {
+                c=((UChar)source[1]<<8)|source[0];
+                source+=2;
+                if(U16_IS_SINGLE(c)) {
+                    *target++=c;
+                    *offsets++=sourceIndex;
+                    sourceIndex+=2;
+                } else if(U16_IS_SURROGATE_LEAD(c) && count>=2 &&
+                          U16_IS_TRAIL(trail=((UChar)source[1]<<8)|source[0])
+                ) {
+                    source+=2;
+                    --count;
+                    *target++=c;
+                    *target++=trail;
+                    *offsets++=sourceIndex;
+                    *offsets++=sourceIndex;
+                    sourceIndex+=4;
+                } else {
+                    break;
+                }
+            } while(--count>0);
+        }
+
+        if(count==0) {
+            /* done with the loop for complete UChars */
+            c=0;
+        } else {
+            /* keep c for surrogate handling, trail will be set there */
+            length+=2*(count-1); /* one more byte pair was consumed than count decremented */
+            targetCapacity+=count;
+        }
+    }
+
+    if(c!=0) {
+        /*
+         * c is a surrogate, and
+         * - source or target too short
+         * - or the surrogate is unmatched
+         */
+        cnv->toUBytes[0]=(uint8_t)c;
+        cnv->toUBytes[1]=(uint8_t)(c>>8);
+        cnv->toULength=2;
+
+        if(U16_IS_SURROGATE_LEAD(c)) {
+            if(length>=2) {
+                if(U16_IS_TRAIL(trail=((UChar)source[1]<<8)|source[0])) {
+                    /* output the surrogate pair, will overflow (see conditions comment above) */
+                    source+=2;
+                    length-=2;
+                    *target++=c;
+                    if(offsets!=NULL) {
+                        *offsets++=sourceIndex;
+                    }
+                    cnv->UCharErrorBuffer[0]=trail;
+                    cnv->UCharErrorBufferLength=1;
+                    cnv->toULength=0;
+                    *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+                } else {
+                    /* unmatched lead surrogate */
+                    *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+                }
+            } else {
+                /* see if the trail surrogate is in the next buffer */
+            }
+        } else {
+            /* unmatched trail surrogate */
+            *pErrorCode=U_ILLEGAL_CHAR_FOUND;
+        }
+    }
+
+    if(U_SUCCESS(*pErrorCode)) {
+        /* check for a remaining source byte */
+        if(length>0) {
+            if(targetCapacity==0) {
+                *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+            } else {
+                /* it must be length==1 because otherwise the above would have copied more */
+                cnv->toUBytes[cnv->toULength++]=*source++;
+            }
+        }
+    }
+
+    /* write back the updated pointers */
+    pArgs->source=(const char *)source;
+    pArgs->target=target;
+    pArgs->offsets=offsets;
+}
+
+static UChar32
+_UTF16LEGetNextUChar(UConverterToUnicodeArgs *pArgs, UErrorCode *err) {
+    const uint8_t *s, *sourceLimit;
+    UChar32 c;
+
+    if(pArgs->converter->mode<8) {
+        return UCNV_GET_NEXT_UCHAR_USE_TO_U;
+    }
+
+    s=(const uint8_t *)pArgs->source;
+    sourceLimit=(const uint8_t *)pArgs->sourceLimit;
+
+    if(s>=sourceLimit) {
+        /* no input */
+        *err=U_INDEX_OUTOFBOUNDS_ERROR;
+        return 0xffff;
+    }
+
+    if(s+2>sourceLimit) {
+        /* only one byte: truncated UChar */
+        pArgs->converter->toUBytes[0]=*s++;
+        pArgs->converter->toULength=1;
+        pArgs->source=(const char *)s;
+        *err = U_TRUNCATED_CHAR_FOUND;
+        return 0xffff;
+    }
+
+    /* get one UChar */
+    c=((UChar32)s[1]<<8)|*s;
+    s+=2;
+
+    /* check for a surrogate pair */
+    if(U_IS_SURROGATE(c)) {
+        if(U16_IS_SURROGATE_LEAD(c)) {
+            if(s+2<=sourceLimit) {
+                UChar trail;
+
+                /* get a second UChar and see if it is a trail surrogate */
+                trail=((UChar)s[1]<<8)|*s;
+                if(U16_IS_TRAIL(trail)) {
+                    c=U16_GET_SUPPLEMENTARY(c, trail);
+                    s+=2;
+                } else {
+                    /* unmatched lead surrogate */
+                    c=-2;
+                }
+            } else {
+                /* too few (2 or 3) bytes for a surrogate pair: truncated code point */
+                uint8_t *bytes=pArgs->converter->toUBytes;
+                s-=2;
+                pArgs->converter->toULength=(int8_t)(sourceLimit-s);
+                do {
+                    *bytes++=*s++;
+                } while(s<sourceLimit);
+
+                c=0xffff;
+                *err=U_TRUNCATED_CHAR_FOUND;
+            }
+        } else {
+            /* unmatched trail surrogate */
+            c=-2;
+        }
+
+        if(c<0) {
+            /* write the unmatched surrogate */
+            uint8_t *bytes=pArgs->converter->toUBytes;
+            pArgs->converter->toULength=2;
+            *bytes=*(s-2);
+            bytes[1]=*(s-1);
+
+            c=0xffff;
+            *err=U_ILLEGAL_CHAR_FOUND;
+        }
+    }
+
+    pArgs->source=(const char *)s;
+    return c;
+} 
+
+static void
+_UTF16LEReset(UConverter *cnv, UConverterResetChoice choice) {
+    if(choice<=UCNV_RESET_TO_UNICODE) {
+        /* reset toUnicode state */
+        if(UCNV_GET_VERSION(cnv)==0) {
+            cnv->mode=8; /* no BOM handling */
+        } else {
+            cnv->mode=0; /* Java-specific "UnicodeLittle" requires LE BOM or no BOM */
+        }
+    }
+    if(choice!=UCNV_RESET_TO_UNICODE && UCNV_GET_VERSION(cnv)==1) {
+        /* reset fromUnicode for "UnicodeLittle": prepare to output the UTF-16LE BOM */
+        cnv->fromUnicodeStatus=UCNV_NEED_TO_WRITE_BOM;
+    }
+}
+
+static void
+_UTF16LEOpen(UConverter *cnv,
+             UConverterLoadArgs *pArgs,
+             UErrorCode *pErrorCode) {
+    if(UCNV_GET_VERSION(cnv)<=1) {
+        _UTF16LEReset(cnv, UCNV_RESET_BOTH);
+    } else {
+        *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+    }
+}
+
+static const char *
+_UTF16LEGetName(const UConverter *cnv) {
+    if(UCNV_GET_VERSION(cnv)==0) {
+        return "UTF-16LE";
+    } else {
+        return "UTF-16LE,version=1";
+    }
+}
+
+static const UConverterImpl _UTF16LEImpl={
+    UCNV_UTF16_LittleEndian,
+
+    NULL,
+    NULL,
+
+    _UTF16LEOpen,
+    NULL,
+    _UTF16LEReset,
+
+    _UTF16LEToUnicodeWithOffsets,
+    _UTF16LEToUnicodeWithOffsets,
+    _UTF16LEFromUnicodeWithOffsets,
+    _UTF16LEFromUnicodeWithOffsets,
+    _UTF16LEGetNextUChar,
+
+    NULL,
+    _UTF16LEGetName,
+    NULL,
+    NULL,
+    ucnv_getNonSurrogateUnicodeSet
+};
+
+
+static const UConverterStaticData _UTF16LEStaticData={
+    sizeof(UConverterStaticData),
+    "UTF-16LE",
+    1202, UCNV_IBM, UCNV_UTF16_LittleEndian, 2, 2,
+    { 0xfd, 0xff, 0, 0 },2,FALSE,FALSE,
+    0,
+    0,
+    { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
+};
+
+
+const UConverterSharedData _UTF16LEData={
+    sizeof(UConverterSharedData), ~((uint32_t) 0),
+    NULL, NULL, &_UTF16LEStaticData, FALSE, &_UTF16LEImpl, 
+    0
+};
+
+/* UTF-16 (Detect BOM) ------------------------------------------------------ */
+
+/*
+ * Detect a BOM at the beginning of the stream and select UTF-16BE or UTF-16LE
+ * accordingly.
+ * This is a simpler version of the UTF-32 converter, with
+ * fewer states for shorter BOMs.
+ *
+ * State values:
+ * 0    initial state
+ * 1    saw first byte
+ * 2..5 -
+ * 6..7 see _UTF16ToUnicodeWithOffsets() comments in state 1
+ * 8    UTF-16BE mode
+ * 9    UTF-16LE mode
+ *
+ * During detection: state==number of initial bytes seen so far.
+ *
+ * On output, emit U+FEFF as the first code point.
+ *
+ * Variants:
+ * - UTF-16,version=1 (Java "Unicode" encoding) treats a missing BOM as an error.
+ * - UTF-16BE,version=1 (Java "UnicodeBig" encoding) and
+ *   UTF-16LE,version=1 (Java "UnicodeLittle" encoding) treat a reverse BOM as an error.
+ */
+
+static void
+_UTF16Reset(UConverter *cnv, UConverterResetChoice choice) {
+    if(choice<=UCNV_RESET_TO_UNICODE) {
+        /* reset toUnicode: state=0 */
+        cnv->mode=0;
+    }
+    if(choice!=UCNV_RESET_TO_UNICODE) {
+        /* reset fromUnicode: prepare to output the UTF-16PE BOM */
+        cnv->fromUnicodeStatus=UCNV_NEED_TO_WRITE_BOM;
+    }
+}
+
+static const UConverterSharedData _UTF16v2Data;
+
+static void
+_UTF16Open(UConverter *cnv,
+           UConverterLoadArgs *pArgs,
+           UErrorCode *pErrorCode) {
+    if(UCNV_GET_VERSION(cnv)<=2) {
+        if(UCNV_GET_VERSION(cnv)==2 && !pArgs->onlyTestIsLoadable) {
+            /*
+             * Switch implementation, and switch the staticData that's different
+             * and was copied into the UConverter.
+             * (See ucnv_createConverterFromSharedData() in ucnv_bld.c.)
+             * UTF-16,version=2 fromUnicode() always writes a big-endian byte stream.
+             */
+            cnv->sharedData=(UConverterSharedData*)&_UTF16v2Data;
+            uprv_memcpy(cnv->subChars, _UTF16v2Data.staticData->subChar, UCNV_MAX_SUBCHAR_LEN);
+        }
+        _UTF16Reset(cnv, UCNV_RESET_BOTH);
+    } else {
+        *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+    }
+}
+
+static const char *
+_UTF16GetName(const UConverter *cnv) {
+    if(UCNV_GET_VERSION(cnv)==0) {
+        return "UTF-16";
+    } else if(UCNV_GET_VERSION(cnv)==1) {
+        return "UTF-16,version=1";
+    } else {
+        return "UTF-16,version=2";
+    }
+}
+
+const UConverterSharedData _UTF16Data;
+
+#define IS_UTF16BE(cnv) ((cnv)->sharedData==&_UTF16BEData)
+#define IS_UTF16LE(cnv) ((cnv)->sharedData==&_UTF16LEData)
+#define IS_UTF16(cnv) ((cnv)->sharedData==&_UTF16Data || (cnv)->sharedData==&_UTF16v2Data)
+
+static void
+_UTF16ToUnicodeWithOffsets(UConverterToUnicodeArgs *pArgs,
+                           UErrorCode *pErrorCode) {
+    UConverter *cnv=pArgs->converter;
+    const char *source=pArgs->source;
+    const char *sourceLimit=pArgs->sourceLimit;
+    int32_t *offsets=pArgs->offsets;
+
+    int32_t state, offsetDelta;
+    uint8_t b;
+
+    state=cnv->mode;
+
+    /*
+     * If we detect a BOM in this buffer, then we must add the BOM size to the
+     * offsets because the actual converter function will not see and count the BOM.
+     * offsetDelta will have the number of the BOM bytes that are in the current buffer.
+     */
+    offsetDelta=0;
+
+    while(source<sourceLimit && U_SUCCESS(*pErrorCode)) {
+        switch(state) {
+        case 0:
+            cnv->toUBytes[0]=(uint8_t)*source++;
+            cnv->toULength=1;
+            state=1;
+            break;
+        case 1:
+            /*
+             * Only inside this switch case can the state variable
+             * temporarily take two additional values:
+             * 6: BOM error, continue with BE
+             * 7: BOM error, continue with LE
+             */
+            b=*source;
+            if(cnv->toUBytes[0]==0xfe && b==0xff) {
+                if(IS_UTF16LE(cnv)) {
+                    state=7; /* illegal reverse BOM for Java "UnicodeLittle" */
+                } else {
+                    state=8; /* detect UTF-16BE */
+                }
+            } else if(cnv->toUBytes[0]==0xff && b==0xfe) {
+                if(IS_UTF16BE(cnv)) {
+                    state=6; /* illegal reverse BOM for Java "UnicodeBig" */
+                } else {
+                    state=9; /* detect UTF-16LE */
+                }
+            } else if((IS_UTF16(cnv) && UCNV_GET_VERSION(cnv)==1)) {
+                state=6; /* illegal missing BOM for Java "Unicode" */
+            }
+            if(state>=8) {
+                /* BOM detected, consume it */
+                ++source;
+                cnv->toULength=0;
+                offsetDelta=(int32_t)(source-pArgs->source);
+            } else if(state<6) {
+                /* ok: no BOM, and not a reverse BOM */
+                if(source!=pArgs->source) {
+                    /* reset the source for a correct first offset */
+                    source=pArgs->source;
+                    cnv->toULength=0;
+                }
+                if(IS_UTF16LE(cnv)) {
+                    /* Make Java "UnicodeLittle" default to LE. */
+                    state=9;
+                } else {
+                    /* Make standard UTF-16 and Java "UnicodeBig" default to BE. */
+                    state=8;
+                }
+            } else {
+                /*
+                 * error: missing BOM, or reverse BOM
+                 * UTF-16,version=1: Java-specific "Unicode" requires a BOM.
+                 * UTF-16BE,version=1: Java-specific "UnicodeBig" requires a BE BOM or no BOM.
+                 * UTF-16LE,version=1: Java-specific "UnicodeLittle" requires an LE BOM or no BOM.
+                 */
+                /* report the non-BOM or reverse BOM as an illegal sequence */
+                cnv->toUBytes[1]=b;
+                cnv->toULength=2;
+                pArgs->source=source+1;
+                /* continue with conversion if the callback resets the error */
+                /*
+                 * Make Java "Unicode" default to BE like standard UTF-16.
+                 * Make Java "UnicodeBig" and "UnicodeLittle" default
+                 * to their normal endiannesses.
+                 */
+                cnv->mode=state+2;
+                *pErrorCode=U_ILLEGAL_ESCAPE_SEQUENCE;
+                return;
+            }
+            /* convert the rest of the stream */
+            cnv->mode=state;
+            continue;
+        case 8:
+            /* call UTF-16BE */
+            pArgs->source=source;
+            _UTF16BEToUnicodeWithOffsets(pArgs, pErrorCode);
+            source=pArgs->source;
+            break;
+        case 9:
+            /* call UTF-16LE */
+            pArgs->source=source;
+            _UTF16LEToUnicodeWithOffsets(pArgs, pErrorCode);
+            source=pArgs->source;
+            break;
+        default:
+            break; /* does not occur */
+        }
+    }
+
+    /* add BOM size to offsets - see comment at offsetDelta declaration */
+    if(offsets!=NULL && offsetDelta!=0) {
+        int32_t *offsetsLimit=pArgs->offsets;
+        while(offsets<offsetsLimit) {
+            *offsets++ += offsetDelta;
+        }
+    }
+
+    pArgs->source=source;
+
+    if(source==sourceLimit && pArgs->flush) {
+        /* handle truncated input */
+        switch(state) {
+        case 0:
+            break; /* no input at all, nothing to do */
+        case 8:
+            _UTF16BEToUnicodeWithOffsets(pArgs, pErrorCode);
+            break;
+        case 9:
+            _UTF16LEToUnicodeWithOffsets(pArgs, pErrorCode);
+            break;
+        default:
+            /* 0<state<8: framework will report truncation, nothing to do here */
+            break;
+        }
+    }
+
+    cnv->mode=state;
+}
+
+static UChar32
+_UTF16GetNextUChar(UConverterToUnicodeArgs *pArgs,
+                   UErrorCode *pErrorCode) {
+    switch(pArgs->converter->mode) {
+    case 8:
+        return _UTF16BEGetNextUChar(pArgs, pErrorCode);
+    case 9:
+        return _UTF16LEGetNextUChar(pArgs, pErrorCode);
+    default:
+        return UCNV_GET_NEXT_UCHAR_USE_TO_U;
+    }
+}
+
+static const UConverterImpl _UTF16Impl = {
+    UCNV_UTF16,
+
+    NULL,
+    NULL,
+
+    _UTF16Open,
+    NULL,
+    _UTF16Reset,
+
+    _UTF16ToUnicodeWithOffsets,
+    _UTF16ToUnicodeWithOffsets,
+    _UTF16PEFromUnicodeWithOffsets,
+    _UTF16PEFromUnicodeWithOffsets,
+    _UTF16GetNextUChar,
+
+    NULL, /* ### TODO implement getStarters for all Unicode encodings?! */
+    _UTF16GetName,
+    NULL,
+    NULL,
+    ucnv_getNonSurrogateUnicodeSet
+};
+
+static const UConverterStaticData _UTF16StaticData = {
+    sizeof(UConverterStaticData),
+    "UTF-16",
+    1204, /* CCSID for BOM sensitive UTF-16 */
+    UCNV_IBM, UCNV_UTF16, 2, 2,
+#if U_IS_BIG_ENDIAN
+    { 0xff, 0xfd, 0, 0 }, 2,
+#else
+    { 0xfd, 0xff, 0, 0 }, 2,
+#endif
+    FALSE, FALSE,
+    0,
+    0,
+    { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
+};
+
+const UConverterSharedData _UTF16Data = {
+    sizeof(UConverterSharedData), ~((uint32_t) 0),
+    NULL, NULL, &_UTF16StaticData, FALSE, &_UTF16Impl, 
+    0
+};
+
+static const UConverterImpl _UTF16v2Impl = {
+    UCNV_UTF16,
+
+    NULL,
+    NULL,
+
+    _UTF16Open,
+    NULL,
+    _UTF16Reset,
+
+    _UTF16ToUnicodeWithOffsets,
+    _UTF16ToUnicodeWithOffsets,
+    _UTF16BEFromUnicodeWithOffsets,
+    _UTF16BEFromUnicodeWithOffsets,
+    _UTF16GetNextUChar,
+
+    NULL, /* ### TODO implement getStarters for all Unicode encodings?! */
+    _UTF16GetName,
+    NULL,
+    NULL,
+    ucnv_getNonSurrogateUnicodeSet
+};
+
+static const UConverterStaticData _UTF16v2StaticData = {
+    sizeof(UConverterStaticData),
+    "UTF-16,version=2",
+    1204, /* CCSID for BOM sensitive UTF-16 */
+    UCNV_IBM, UCNV_UTF16, 2, 2,
+    { 0xff, 0xfd, 0, 0 }, 2,
+    FALSE, FALSE,
+    0,
+    0,
+    { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
+};
+
+static const UConverterSharedData _UTF16v2Data = {
+    sizeof(UConverterSharedData), ~((uint32_t) 0),
+    NULL, NULL, &_UTF16v2StaticData, FALSE, &_UTF16v2Impl, 
+    0
+};
+
+#endif
Property changes on: icu46/source/common/ucnv_u16.c
___________________________________________________________________
Added: svn:eol-style
   + LF