464 lines
14 KiB
C
464 lines
14 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 1998-1999, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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*
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* ucnv_err.c
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* Implements error behaviour functions called by T_UConverter_{from,to}Unicode
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*
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*
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* Change history:
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*
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* 06/29/2000 helena Major rewrite of the callback APIs.
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*/
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#include "ucmp8.h"
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#include "ucmp16.h"
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#include "unicode/ucnv_err.h"
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#include "ucnv_cnv.h"
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#include "cmemory.h"
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#include "unicode/ucnv.h"
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#define VALUE_STRING_LENGTH 32
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/*Magic # 32 = 4(number of char in value string) * 8(max number of bytes per char for any converter) */
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#define CODEPOINT_STRING_LENGTH 7
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#define UNICODE_PERCENT_SIGN_CODEPOINT 0x0025
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#define UNICODE_U_CODEPOINT 0x0055
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#define UNICODE_X_CODEPOINT 0x0058
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#define ToOffset(a) a<=9?(0x0030+a):(0x0030+a+7)
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UBool
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CONVERSION_U_SUCCESS (UErrorCode err)
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{
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if ((err == U_INVALID_CHAR_FOUND) || (err == U_ILLEGAL_CHAR_FOUND)) return FALSE;
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else return TRUE;
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}
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/*Takes a int32_t and fills in a UChar* string with that number "radix"-based
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* and padded with "pad" zeroes
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*/
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static void itou (UChar * buffer, int32_t i, int32_t radix, int32_t pad)
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{
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int32_t length = 0;
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int32_t num = 0;
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int8_t digit;
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int32_t j;
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UChar temp;
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while (i >= radix)
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{
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num = i / radix;
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digit = (int8_t) (i - num * radix);
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buffer[length++] = (UChar) (ToOffset (digit));
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i = num;
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}
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buffer[length] = (UChar) (ToOffset (i));
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while (length < pad) buffer[++length] = (UChar) 0x0030; /*zero padding */
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buffer[length--] = (UChar) 0x0000;
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/*Reverses the string */
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for (j = 0; j < (pad / 2); j++)
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{
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temp = buffer[length - j];
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buffer[length - j] = buffer[j];
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buffer[j] = temp;
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}
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return;
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}
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/*Function Pointer STOPS at the ILLEGAL_SEQUENCE */
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void UCNV_FROM_U_CALLBACK_STOP (
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void *context,
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UConverterFromUnicodeArgs *fromUArgs,
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const UChar* codeUnits,
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int32_t length,
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UChar32 codePoint,
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UConverterCallbackReason reason,
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UErrorCode * err)
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{
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/* the caller must have set the error code accordingly */
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return;
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}
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/*Function Pointer STOPS at the ILLEGAL_SEQUENCE */
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void UCNV_TO_U_CALLBACK_STOP (
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void *context,
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UConverterToUnicodeArgs *toUArgs,
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const char* codePoints,
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int32_t length,
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UConverterCallbackReason reason,
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UErrorCode * err)
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{
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/* the caller must have set the error code accordingly */
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return;
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}
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void UCNV_FROM_U_CALLBACK_SKIP (
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void *context,
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UConverterFromUnicodeArgs *fromUArgs,
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const UChar* codeUnits,
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int32_t length,
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UChar32 codePoint,
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UConverterCallbackReason reason,
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UErrorCode * err)
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{
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if (reason <= UCNV_IRREGULAR)
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{
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*err = U_ZERO_ERROR;
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}
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}
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void UCNV_FROM_U_CALLBACK_SUBSTITUTE (
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void *context,
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UConverterFromUnicodeArgs *fromArgs,
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const UChar* codeUnits,
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int32_t length,
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UChar32 codePoint,
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UConverterCallbackReason reason,
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UErrorCode * err)
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{
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char togo[5];
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int32_t togoLen;
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if (reason > UCNV_IRREGULAR)
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{
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return;
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}
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/* ### TODO:
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* This should use the new ucnv_cbWrite...() functions instead of doing
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* "tricks" as before we had a good callback API!
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*/
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/*In case we're dealing with a modal converter a la UCNV_EBCDIC_STATEFUL,
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we need to make sure that the emitting of the substitution charater in the right mode*/
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uprv_memcpy(togo, fromArgs->converter->subChar, togoLen = fromArgs->converter->subCharLen);
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if (ucnv_getType(fromArgs->converter) == UCNV_EBCDIC_STATEFUL)
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{
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if ((fromArgs->converter->fromUnicodeStatus)&&(togoLen != 2))
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{
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togo[0] = UCNV_SI;
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togo[1] = fromArgs->converter->subChar[0];
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togo[2] = UCNV_SO;
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togoLen = 3;
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}
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else if (!(fromArgs->converter->fromUnicodeStatus)&&(togoLen != 1))
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{
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togo[0] = UCNV_SO;
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togo[1] = fromArgs->converter->subChar[0];
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togo[2] = fromArgs->converter->subChar[1];
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togo[3] = UCNV_SI;
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togoLen = 4;
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}
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}
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/*if we have enough space on the output buffer we just copy
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the subchar there and update the pointer */
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if ((fromArgs->targetLimit - fromArgs->target) >= togoLen)
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{
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uprv_memcpy (fromArgs->target, togo, togoLen);
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fromArgs->target += togoLen;
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*err = U_ZERO_ERROR;
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if (fromArgs->offsets)
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{
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int i=0;
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for (i=0;i<togoLen;i++) fromArgs->offsets[i]=0;
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fromArgs->offsets += togoLen;
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}
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}
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else
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{
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/*if we don't have enough space on the output buffer
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*we copy as much as we can to it, update that pointer.
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*copy the rest in the internal buffer, and increase the
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*length marker
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*/
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uprv_memcpy (fromArgs->target, togo, (fromArgs->targetLimit - fromArgs->target));
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if (fromArgs->offsets)
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{
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int i=0;
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for (i=0;i<(fromArgs->targetLimit - fromArgs->target);i++) fromArgs->offsets[i]=0;
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fromArgs->offsets += (fromArgs->targetLimit - fromArgs->target);
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}
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uprv_memcpy (fromArgs->converter->charErrorBuffer + fromArgs->converter->charErrorBufferLength,
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togo + (fromArgs->targetLimit - fromArgs->target),
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togoLen - (fromArgs->targetLimit - fromArgs->target));
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fromArgs->converter->charErrorBufferLength += togoLen - (fromArgs->targetLimit - fromArgs->target);
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fromArgs->target += (fromArgs->targetLimit - fromArgs->target);
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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}
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return;
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}
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/*uses itou to get a unicode escape sequence of the offensive sequence,
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*uses a clean copy (resetted) of the converter, to convert that unicode
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*escape sequence to the target codepage (if conversion failure happens then
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*we revert to substituting with subchar)
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*/
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void UCNV_FROM_U_CALLBACK_ESCAPE (
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void *context,
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UConverterFromUnicodeArgs *fromArgs,
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const UChar *codeUnits,
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int32_t length,
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UChar32 codePoint,
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UConverterCallbackReason reason,
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UErrorCode * err)
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{
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UChar valueString[VALUE_STRING_LENGTH];
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int32_t valueStringLength = 0;
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UChar codepoint[CODEPOINT_STRING_LENGTH];
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int32_t i = 0;
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/*Makes a bitwise copy of the converter passwd in */
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UConverter myConverter = *(fromArgs->converter);
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char myTarget[VALUE_STRING_LENGTH];
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char *myTargetAlias = myTarget;
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const UChar *myValueSource = NULL;
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UErrorCode err2 = U_ZERO_ERROR;
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uint32_t myFromUnicodeStatus = fromArgs->converter->fromUnicodeStatus;
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UConverterFromUCallback original = NULL;
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if (reason > UCNV_IRREGULAR)
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{
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return;
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}
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/* ### TODO:
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* This should use the new ucnv_cbWrite...() functions instead of doing
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* "tricks" as before we had a good callback API!
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*/
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ucnv_reset (&myConverter);
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myConverter.fromUnicodeStatus = myFromUnicodeStatus;
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ucnv_setFromUCallBack (&myConverter,
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(UConverterFromUCallback) UCNV_FROM_U_CALLBACK_STOP,
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NULL, /* To Do for HSYS: context is null? */
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&original,
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NULL,
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&err2);
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if (U_FAILURE (err2))
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{
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*err = err2;
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return;
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}
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/*
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* ### TODO:
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* This should actually really work with the codePoint, not with the codeUnits;
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* how do we represent a code point > 0xffff? It should be one single escape, not
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* two for a surrogate pair!
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*/
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codepoint[0] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
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codepoint[1] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
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while (i < length)
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{
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itou (codepoint + 2, codeUnits[i++], 16, 4);
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uprv_memcpy (valueString + valueStringLength, codepoint, sizeof (UChar) * 6);
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valueStringLength += CODEPOINT_STRING_LENGTH - 1;
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}
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myValueSource = valueString;
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/*converts unicode escape sequence */
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ucnv_fromUnicode (&myConverter,
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&myTargetAlias,
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myTargetAlias + VALUE_STRING_LENGTH,
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&myValueSource,
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myValueSource + CODEPOINT_STRING_LENGTH - 1,
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NULL,
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TRUE,
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&err2);
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if (U_FAILURE (err2))
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{
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UCNV_FROM_U_CALLBACK_SUBSTITUTE (
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NULL, /* TO do for HSYS: context */
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fromArgs,
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codeUnits,
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length,
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codePoint,
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reason,
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err);
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return;
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}
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valueStringLength = myTargetAlias - myTarget;
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/*if we have enough space on the output buffer we just copy
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* the subchar there and update the pointer
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*/
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if ((fromArgs->targetLimit - fromArgs->target) >= valueStringLength)
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{
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uprv_memcpy (fromArgs->target, myTarget, valueStringLength);
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fromArgs->target += valueStringLength;
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*err = U_ZERO_ERROR;
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if (fromArgs->offsets)
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{
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int j=0;
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for (j=0;j<valueStringLength;j++) fromArgs->offsets[j]=0;
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fromArgs->offsets += valueStringLength;
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}
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}
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else
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{
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/*if we don't have enough space on the output buffer
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*we copy as much as we can to it, update that pointer.
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*copy the rest in the internal buffer, and increase the
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*length marker
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*/
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if (fromArgs->offsets)
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{
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int j=0;
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for (j=0;j<(fromArgs->targetLimit - fromArgs->target);j++) fromArgs->offsets[j]=0;
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fromArgs->offsets += (fromArgs->targetLimit - fromArgs->target);
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}
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uprv_memcpy (fromArgs->target, myTarget, (fromArgs->targetLimit - fromArgs->target));
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uprv_memcpy (fromArgs->converter->charErrorBuffer + fromArgs->converter->charErrorBufferLength,
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myTarget + (fromArgs->targetLimit - fromArgs->target),
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valueStringLength - (fromArgs->targetLimit - fromArgs->target));
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fromArgs->converter->charErrorBufferLength += valueStringLength - (fromArgs->targetLimit - fromArgs->target);
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fromArgs->target += (fromArgs->targetLimit - fromArgs->target);
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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}
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return;
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}
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void UCNV_TO_U_CALLBACK_SKIP (
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void *context,
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UConverterToUnicodeArgs *toArgs,
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const char* codeUnits,
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int32_t length,
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UConverterCallbackReason reason,
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UErrorCode * err)
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{
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if (reason <= UCNV_IRREGULAR)
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{
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*err = U_ZERO_ERROR;
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}
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}
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void UCNV_TO_U_CALLBACK_SUBSTITUTE (
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void *context,
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UConverterToUnicodeArgs *toArgs,
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const char* codeUnits,
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int32_t length,
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UConverterCallbackReason reason,
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UErrorCode * err)
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{
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if (reason > UCNV_IRREGULAR)
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{
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return;
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}
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/* ### TODO:
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* This should use the new ucnv_cbWrite...() functions instead of doing
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* "tricks" as before we had a good callback API!
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*/
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if ((toArgs->targetLimit - toArgs->target) >= 1)
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{
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*toArgs->target = 0xFFFD;
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(toArgs->target)++;
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if (toArgs->offsets) *(toArgs->offsets) = 0;
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*err = U_ZERO_ERROR;
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}
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else
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{
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toArgs->converter->UCharErrorBuffer[toArgs->converter->UCharErrorBufferLength] = 0xFFFD;
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toArgs->converter->UCharErrorBufferLength++;
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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}
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return;
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}
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/*uses itou to get a unicode escape sequence of the offensive sequence,
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*and uses that as the substitution sequence
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*/
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void UCNV_TO_U_CALLBACK_ESCAPE (
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void *context,
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UConverterToUnicodeArgs *toArgs,
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const char* codeUnits,
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int32_t length,
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UConverterCallbackReason reason,
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UErrorCode * err)
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{
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UChar uniValueString[VALUE_STRING_LENGTH];
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int32_t valueStringLength = 0;
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int32_t i = 0;
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if (reason > UCNV_IRREGULAR)
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{
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return;
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}
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/* ### TODO:
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* This should use the new ucnv_cbWrite...() functions instead of doing
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* "tricks" as before we had a good callback API!
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* (Actually, this function is not all that bad.)
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*/
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while (i < length)
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{
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uniValueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
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uniValueString[valueStringLength++] = (UChar) UNICODE_X_CODEPOINT; /* adding X */
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itou (uniValueString + valueStringLength, codeUnits[i++], 16, 2);
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valueStringLength += 2;
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}
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if ((toArgs->targetLimit - toArgs->target) >= valueStringLength)
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{
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/*if we have enough space on the output buffer we just copy
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* the subchar there and update the pointer
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*/
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uprv_memcpy (toArgs->target, uniValueString, (sizeof (UChar)) * (valueStringLength));
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if (toArgs->offsets)
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{
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for (i = 0; i < valueStringLength; i++) toArgs->offsets[i] = 0;
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}
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toArgs->target += valueStringLength;
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*err = U_ZERO_ERROR;
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}
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else
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{
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/*if we don't have enough space on the output buffer
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*we copy as much as we can to it, update that pointer.
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*copy the rest in the internal buffer, and increase the
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*length marker
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*/
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uprv_memcpy (toArgs->target, uniValueString, (sizeof (UChar)) * (toArgs->targetLimit - toArgs->target));
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if (toArgs->offsets)
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{
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for (i = 0; i < (toArgs->targetLimit - toArgs->target); i++) toArgs->offsets[i] = 0;
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}
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uprv_memcpy (toArgs->converter->UCharErrorBuffer,
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uniValueString + (toArgs->targetLimit - toArgs->target),
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(sizeof (UChar)) * (valueStringLength - (toArgs->targetLimit - toArgs->target)));
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toArgs->converter->UCharErrorBufferLength += valueStringLength - (toArgs->targetLimit - toArgs->target);
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toArgs->target += (toArgs->targetLimit - toArgs->target);
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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}
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return;
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}
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